CN207831332U - The micro- stove heat system quickly started for Subcritical Units - Google Patents
The micro- stove heat system quickly started for Subcritical Units Download PDFInfo
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- CN207831332U CN207831332U CN201721714953.XU CN201721714953U CN207831332U CN 207831332 U CN207831332 U CN 207831332U CN 201721714953 U CN201721714953 U CN 201721714953U CN 207831332 U CN207831332 U CN 207831332U
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- pressure heater
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Abstract
The utility model provides a kind of micro- stove heat system quickly started for Subcritical Units, comb and economizer one end are determined in drum connection, the economizer other end connects No. 1 high-pressure heater one end, and 1,2, No. 3 high-pressure heater is sequentially connected, and No. 3 high-pressure heaters connect oxygen-eliminating device；Drum connects distributor by down-comer, and distributor connects lower collecting box, and lower collecting box connects drum by water-cooling wall, and lower collecting box connects oxygen-eliminating device；Oxygen-eliminating device connects auxiliary decatize vapour incoming pipeline, No. 2 adjacent stove steam incoming pipelines of high-pressure heater connection.The working medium in the former circulatory system is led into oxygen-eliminating device from lower collecting box in start-up course, form working medium circulation, and working medium is heated using level-one high-pressure heater, accelerate the working medium temperature rise rate in start-up course, it realizes to shorten and starts the time, saves the effect for starting energy consumption, improve unit economy.
Description
Technical field
The utility model is related to a kind of micro- stove heat system and methods quickly started for Subcritical Units, face for Asia
Boundary's fired power generating unit heating boiler internal working medium on startup, belongs to power station technology field.
Background technology
Under new energy-saving and emission-reduction situation, for the requirement for adapting to new, it is ensured that power plant's technological precedence, unit efficiency height, resource
It consumes less, is good in economic efficiency, further increasing competitiveness, should actively create conditions using advanced, ripe technology to existing
Machine set technology is transformed, and is made great efforts to excavate internal potential, is improved the reliability and economy of unit, reduces cost, and further
The requirement of power grid depth peak regulation is adapted to, the raising of power generation plant technology equipment is promoted, mitigates the pollution to environment.
Currently, unit generally existing during cold start is thrown, oil mass is big, starts the disadvantage of time length, normal primary cold
State startup needs 70~80 tons of oil supply, from ignition of the boiler to the set grid-connection time about at 8 hours or so, it is seen that when startup
Between length, consumption it is big.By taking annual unit averagely starts 5 times as an example, often it is only the oil mass of start-up course consumption in tons up to a hundred, together
When due to starting overlong time, unit denitration device cannot reach the reaction temperature of SCR reactors in start-up course, lead to denitration
Equipment cannot put into operation, and power plant faces the pressure of environmental protection examination.
The existing activation system of Subcritical Units as shown in Figure 1, unit be respectively completed in start-up course cold conditions cleaning and
Hot cleaning, in start-up course, boiler first heats oxygen-eliminating device, and water supply is heated to defined upper coolant-temperature gage (one
As at 105 DEG C), cold conditions cleaning is completed while boiler water filling, row is determined by drum and lower collecting box in cold conditions cleaning process
Valve A and platoon valve B discharge upper water, and then gradually heating reaches coolant-temperature gage, and Subcritical Units cold conditions was cleaned
Journey is than very fast；After completing cold conditions cleaning, valve door A and platoon valve B are determined in closing, and preparing igniting after starting trouble air and flue system rises
Temperature, when water-cooling wall reaches 180 DEG C or so, boiler starts hot cleaning until water quality is qualified.
The Chinese patent of Patent No. 201310739154.8 disclose a kind of super (super-) critical unit it is energy-saving quickly
Startup method, its source steam of patent utilization simple in start-up course heat certain grade of high-pressure heater heating water supply, with
The moisturizing of start-up course, its source steam consumption increase, this is bound to cause, and feed temperature promotion rate is limited, and energy-saving effect is limited.
Utility model content
The technical problems to be solved in the utility model is how to shorten boiler startup process time, realizes quickly opening for unit
The dynamic and denitration device that puts into operation before grid-connected.
In order to solve the above-mentioned technical problem, the technical solution of the utility model is to provide a kind of quick for Subcritical Units
The micro- stove heat system started, it is characterised in that：Including drum, comb and economizer one end are determined in drum connection, and economizer is another
End No. 1 high-pressure heater one end of connection, No. 1 high-pressure heater other end connect No. 2 high-pressure heater one end, No. 2 hyperbaric heatings
The device other end connects No. 3 high-pressure heater one end, and No. 3 high-pressure heater other ends connect oxygen-eliminating device；Drum is connected by down-comer
Distributor is connect, distributor connects lower collecting box, and lower collecting box connects drum by water-cooling wall, and lower collecting box also connects deoxygenation by platoon pipe
Device；Oxygen-eliminating device connects auxiliary decatize vapour incoming pipeline, No. 2 adjacent stove steam incoming pipelines of high-pressure heater connection.
Preferably, it is described determine comb be equipped with determine valve door.
Preferably, No. 2 inlet of high pressure heater ends are equipped with regulating valve with adjacent stove steam incoming line connection.
Preferably, the pipeline that the economizer arrival end is connect with No. 1 high-pressure heater is equipped with regulating valve.
Preferably, the oxygen-eliminating device arrival end is equipped with regulating valve with auxiliary decatize vapour incoming line connection.
Preferably, the platoon pipe that the lower collecting box exit is connect with oxygen-eliminating device is equipped with platoon valve, shut-off valve, flow
Regulating valve.
Preferably, No. 2 high-pressure heaters are heated by adjacent stove steam in start-up course.
Preferably, working medium is drawn in start-up course and is entered in oxygen-eliminating device by the lower collecting box.
The above-mentioned micro- stove heat system quickly started for Subcritical Units is using step：
Step 1：It intakes to oxygen-eliminating device, and is introduced into auxiliary decatize vapour incoming and the water supply in oxygen-eliminating device is heated,
Cold conditions cleaning is completed during heating water supply；
Step 2：After meeting upper water condition, the water supply that adjacent stove steam incoming heats No. 2 high-pressure heaters is introduced；Gradually open
It opens economizer inlet adjustment valve and carries out boiler water filling, while opening the valve on lower collecting box exit to deaerator connecting pipe section,
Working medium in down-comer and water-cooling wall is introduced into oxygen-eliminating device, duplex matter system is established at this time, and water supply is followed by deoxygenation
Device --- economizer --- drum --- down-comer --- lower collecting box --- oxygen-eliminating device；
Step 3：When the corresponding saturation temperature of the adjacent stove steam pressure of feed temperature arrival, closes lower collecting box exit and remove
Oxygen device connects all valves on pipeline section, after water cooling wall outlet reaches setting pressure, increases feedwater flow to minimum ignition flow
More than, the oil gun that starts to put into operation at this time is lighted a fire；Wind turbine is opened after fuel ignition, is increased coal-fired thermic load, is reached in thermic load
It is minimum exit fuel oil thermic load after cut off fuel oil, complete start-up course at this time.
Preferably, in the step 1, be introduced into auxiliary decatize vapour incoming and the water supply in oxygen-eliminating device heated, by water supply plus
Heat is to 105 DEG C.
System provided by the utility model draws the working medium in the former circulatory system from lower collecting box pipeline section in start-up course
To oxygen-eliminating device, working medium circulation is thus formed in start-up course, and heated to working medium using level-one high-pressure heater, added
Working medium temperature rise rate in fast start-up course, realizes to shorten and starts the time, saves the effect for starting energy consumption.
System provided by the utility model overcomes the deficiencies in the prior art, reduces work when Power Plant Thermal System starts
Matter and loss of oil volume shorten the startup time of unit, improve unit economy.
Description of the drawings
Fig. 1 is the existing activation system schematic diagram of Subcritical Units；
Fig. 2 is the micro- stove heat system schematic provided in this embodiment quickly started for Subcritical Units.
Specific implementation mode
With reference to specific embodiment, the utility model is expanded on further.
Fig. 2 is the micro- stove heat system schematic provided in this embodiment quickly started for Subcritical Units, described
The micro- stove heat system quickly started for Subcritical Units includes drum, and drum connection determines comb and economizer one end, saves coal
The device other end connects No. 1 high-pressure heater one end, and No. 1 high-pressure heater other end connects No. 2 high-pressure heater one end, No. 2 height
The heater other end is pressed to connect No. 3 high-pressure heater one end, No. 3 high-pressure heater other ends connect oxygen-eliminating device；Under drum passes through
It drops pipe and connects distributor, distributor connects lower collecting box, and lower collecting box connects drum by water-cooling wall, and lower collecting box also passes through platoon Guan Lian
Connect oxygen-eliminating device；Oxygen-eliminating device connects auxiliary decatize vapour incoming pipeline, No. 2 adjacent stove steam incoming pipelines of high-pressure heater connection.
No. 2 high-pressure heaters are heated by adjacent stove steam in start-up course.Lower collecting box draws working medium in start-up course
Go out to enter in oxygen-eliminating device.
Determine to be equipped on comb and determines valve door A.
No. 2 inlet of high pressure heater ends are equipped with regulating valve with adjacent stove steam incoming line connection.
The pipeline that economizer arrival end is connect with No. 1 high-pressure heater is equipped with regulating valve.
Oxygen-eliminating device arrival end is equipped with regulating valve with auxiliary decatize vapour incoming line connection.
Platoon valve B, shut-off valve, flow-rate adjustment are equipped on the platoon pipe that lower collecting box exit is connect with oxygen-eliminating device successively
Valve.
The application method of the micro- stove heat system provided in this embodiment quickly started for Subcritical Units is as follows：
First, it intakes to oxygen-eliminating device, and opens the regulating valve of auxiliary decatize vapour incoming flow pipe road, to giving in oxygen-eliminating device
Water carries out being heated to 105 DEG C, and cold conditions cleaning is completed during heating water supply；
Then, after meeting upper water condition, the regulating valve of adjacent stove steam incoming flow pipe road is opened, heats No. 2 hyperbaric heatings
The water supply of device gradually opens economizer inlet adjustment valve and carries out boiler water filling, while opening lower collecting box exit and connecting to oxygen-eliminating device
Working medium in down-comer and water-cooling wall is introduced oxygen-eliminating device, at this time working medium circulation system by shut-off valve, flow control valve on nozzle belt
Construction in a systematic way is vertical, water supply is followed by oxygen-eliminating device --- economizer --- drum --- down-comer --- lower collecting box --- oxygen-eliminating device；
When feed temperature is close to 180 DEG C of the corresponding saturation temperature of adjacent stove steam pressure, closes lower collecting box exit and remove
Platoon valve B, shut-off valve, flow control valve on oxygen device connection pipeline section add after water cooling wall outlet reaches certain pressure 1.3MPa
More than big feedwater flow to minimum ignition flow, the oil gun that starts to put into operation at this time is lighted a fire, due to the working medium in water-cooling wall
Reach very high temperature, wind turbine can be quickly opened after fuel ignition, increases coal-fired thermic load, reach minimum in thermic load and exit fuel oil
Fuel oil is cut off after thermic load, completes start-up course at this time.
The above, the only preferred embodiment of the utility model, it is in any form and substantive not to the utility model
On limitation, it is noted that for those skilled in the art, in the premise for not departing from the utility model method
Under, several improvement and supplement can be also made, these are improved and supplement also should be regarded as the scope of protection of the utility model.It is all ripe
Professional and technical personnel is known, in the case where not departing from the spirit and scope of the utility model, when using disclosed above
Technology contents and the equivalent variations of a little variation, modification and evolution made, be the equivalent embodiment of the utility model；Together
When, all substantial technologicals according to the utility model to the variation, modification and evolution of any equivalent variations made by above-described embodiment,
In the range of still falling within the technical solution of the utility model.
Claims (6)
1. a kind of micro- stove heat system quickly started for Subcritical Units, it is characterised in that：Including drum, drum connection is fixed
Comb and economizer one end, the economizer other end connect No. 1 high-pressure heater one end, and No. 1 high-pressure heater other end connects No. 2
High-pressure heater one end, No. 2 high-pressure heater other ends connect No. 3 high-pressure heater one end, and No. 3 high-pressure heater other ends connect
Connect oxygen-eliminating device；Drum connects distributor by down-comer, and distributor connects lower collecting box, and lower collecting box connects drum by water-cooling wall,
Lower collecting box also connects oxygen-eliminating device by platoon pipe；Oxygen-eliminating device connects auxiliary decatize vapour incoming pipeline, No. 2 adjacent stoves of high-pressure heater connection
Steam incoming pipeline.
2. a kind of micro- stove heat system quickly started for Subcritical Units as described in claim 1, it is characterised in that：Institute
State determine comb be equipped with determine valve door.
3. a kind of micro- stove heat system quickly started for Subcritical Units as described in claim 1, it is characterised in that：Institute
It states No. 2 inlet of high pressure heater ends and is equipped with regulating valve with adjacent stove steam incoming line connection.
4. a kind of micro- stove heat system quickly started for Subcritical Units as described in claim 1, it is characterised in that：Institute
It states the pipeline that economizer arrival end is connect with No. 1 high-pressure heater and is equipped with regulating valve.
5. a kind of micro- stove heat system quickly started for Subcritical Units as described in claim 1, it is characterised in that：Institute
It states oxygen-eliminating device arrival end and is equipped with regulating valve with auxiliary decatize vapour incoming line connection.
6. a kind of micro- stove heat system quickly started for Subcritical Units as described in claim 1, it is characterised in that：Institute
It states the platoon pipe that lower collecting box exit is connect with oxygen-eliminating device and is equipped with platoon valve, shut-off valve, flow control valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721714953.XU CN207831332U (en) | 2017-12-11 | 2017-12-11 | The micro- stove heat system quickly started for Subcritical Units |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721714953.XU CN207831332U (en) | 2017-12-11 | 2017-12-11 | The micro- stove heat system quickly started for Subcritical Units |
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| CN207831332U true CN207831332U (en) | 2018-09-07 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110056853A (en) * | 2019-05-13 | 2019-07-26 | 国家电投集团电站运营技术（北京）有限公司 | Boiler thermodynamic system and its control method |
| CN111256105A (en) * | 2020-01-20 | 2020-06-09 | 上海发电设备成套设计研究院有限责任公司 | Micro-furnace heating system and method for quickly starting ultra-supercritical unit |
-
2017
- 2017-12-11 CN CN201721714953.XU patent/CN207831332U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110056853A (en) * | 2019-05-13 | 2019-07-26 | 国家电投集团电站运营技术（北京）有限公司 | Boiler thermodynamic system and its control method |
| CN111256105A (en) * | 2020-01-20 | 2020-06-09 | 上海发电设备成套设计研究院有限责任公司 | Micro-furnace heating system and method for quickly starting ultra-supercritical unit |
| CN111256105B (en) * | 2020-01-20 | 2022-01-07 | 上海发电设备成套设计研究院有限责任公司 | Micro-furnace heating system and method for quickly starting ultra-supercritical unit |
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