CN109404883A - A kind of accumulation of heat regulation distributed combined heat and power generation system - Google Patents
A kind of accumulation of heat regulation distributed combined heat and power generation system Download PDFInfo
- Publication number
- CN109404883A CN109404883A CN201811209626.8A CN201811209626A CN109404883A CN 109404883 A CN109404883 A CN 109404883A CN 201811209626 A CN201811209626 A CN 201811209626A CN 109404883 A CN109404883 A CN 109404883A
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- steam
- heat
- power generation
- accumulator
- accumulation
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- 238000010248 power generation Methods 0.000 title claims abstract description 43
- 238000009825 accumulation Methods 0.000 title claims abstract description 22
- 230000033228 biological regulation Effects 0.000 title description 10
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 20
- 230000008020 evaporation Effects 0.000 claims description 9
- 238000001704 evaporation Methods 0.000 claims description 9
- 239000007788 liquid Substances 0.000 claims description 9
- 238000007664 blowing Methods 0.000 claims description 5
- 230000005611 electricity Effects 0.000 claims description 5
- 238000000034 method Methods 0.000 claims description 4
- 229920006395 saturated elastomer Polymers 0.000 claims description 4
- 230000013632 homeostatic process Effects 0.000 claims description 3
- 230000008676 import Effects 0.000 claims description 3
- 230000035939 shock Effects 0.000 abstract 1
- 238000002485 combustion reaction Methods 0.000 description 6
- 238000010438 heat treatment Methods 0.000 description 6
- 238000010025 steaming Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000006837 decompression Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 238000005338 heat storage Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000004321 preservation Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
- F22B33/00—Steam-generation plants, e.g. comprising steam boilers of different types in mutual association
- F22B33/18—Combinations of steam boilers with other apparatus
- F22B33/185—Combinations of steam boilers with other apparatus in combination with a steam accumulator
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D15/00—Adaptations of machines or engines for special use; Combinations of engines with devices driven thereby
- F01D15/10—Adaptations for driving, or combinations with, electric generators
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Control Of Steam Boilers And Waste-Gas Boilers (AREA)
Abstract
The invention discloses a kind of accumulation of heats to regulate and control distributed combined heat and power generation system, it is made of differential pressure power generation machine, steam accumulator and corresponding control unit, the Multi-class propagation of the energy and the use gas inhomogeneities of heat user are fully considered, differential pressure power generation machine and steam accumulator are effectively combined, take full advantage of boiler efficiency, the boiler oil consumption for saving about 10%, efficiently solves peak load to the shock problem of system, also mitigates the workload and degree of fatigue of worker.
Description
Technical field
The invention belongs to distributed heat accumulation regulation and control field, in particular to a kind of differential pressure power generation, steam stores regulator control system.
Background technique
Current boiler air supply system is constituted simply, and efficiency of energy utilization is lower, because steam load is in fluctuation status,
Blowing out even is wanted when load is lower, this makes boiler combustion very unstable, and boiler worker need to add on demand according to steam pressure gauge
Refuelling is adjusted, this undoubtedly increases the work load of worker, and can reduce boiler service life.
Patent of invention content
In order to overcome the above-mentioned deficiencies of the prior art, the present invention proposes a kind of accumulation of heat regulation distributed combined heat and power generation system,
It is big to solve current steam load fluctuation, the far super boiler capacity of peak load, the lower problem of efficiency of energy utilization.
In order to achieve the above object, the invention proposes technical solutions below:
A kind of accumulation of heat regulation distributed combined heat and power generation system, including steam boiler, differential pressure power generation machine, steam accumulator, institute
The steam (vapor) outlet of differential pressure power generation machine connection steam boiler is stated, the steam (vapor) outlet of the differential pressure power generation machine passes through the pipe with control valve
Road connects import and the heat user of the steam accumulator；The steam (vapor) outlet of the steam accumulator passes through the pipeline with control valve
It is connected to heat user, the differential pressure power generation machine is generated electricity using the high pressure of the hot steam of the steam boiler, and power supply user makes
With.
Non-return is provided on pipeline between the steam (vapor) outlet of the differential pressure power generation machine and the entrance of the steam accumulator
Valve is provided with pressure reducing valve on the pipeline between the steam (vapor) outlet and heat user of the steam accumulator.
The pipeline of control valve in parallel one is had between the differential pressure power generation machine steam (vapor) outlet and the steam accumulator entrance
Bypass conduit.
Pipeline between the steam (vapor) outlet and heat user of the steam accumulator is parallel with a bypass conduit.
Drain valve is equipped with close to the side of the steam boiler in the steam accumulator, it is ensured that the water in steam accumulator
Liquid level keeps homeostasis.
The steam accumulator far from the steam boiler side be equipped with liquid level indicator, the liquid level indicator with
The steam boiler connection, while monitoring the water in steam boiler and steam accumulator.
Further, the steam accumulator amount of capacity is determined by following calculation method:
Wherein, M is the maximum continuous evaporation amount of the steam boiler, MmaxFor the steam peak load of the steam boiler,
T is peak load duration,For the condensed water heat under the steam accumulator the blowing pressure P1,For institute
State the condensed water heat under steam accumulator outlet pressure P2, hfgFor the generation 1kg under the steam accumulator outlet pressure P2
Heat needed for saturated water, F are flash-off steam ratio.
Still further, the steam accumulator uses horizontal steam accumulator, size meets the following conditions:
Wherein, L is steam accumulator length, and D is steam accumulator diameter, also needs to meet simultaneously: water entrained by steam does not occur
Maximum evaporation rate S (kg/m2h) be 220 times of operating pressure P (bar g),
The present invention compared to the prior art, have it is following the utility model has the advantages that
Storage of the heat reservoir of the present invention for distributed combined heat and power generation thermal energy discharges, according to the actual load feelings of heat user
Condition and design, steam when by underload stores, and carries out decompression release when required by flash principle, and amount of storage should expire
Any peak condition of foot.Storage heater has good heat preservation property, and heat loss is small, and does not influence steam quality.Heat accumulation of the present invention
System effectively increases the utilization efficiency and comprehensive utilization rate of energy source of boiler；Meanwhile by the adjusting of system, steam can be made
Load curve is gentler, reduces part of fuel consumption, improves the economy of system.
Detailed description of the invention
Fig. 1 is the schematic diagram of accumulation of heat regulation distributed combined heat and power generation system of the present invention.
Fig. 2 is the topology diagram of accumulation of heat regulation distributed combined heat and power generation system in embodiment.
Fig. 3 is the boiler heating system boiler combustion rate curve graph in embodiment without steam accumulator.
Fig. 4 is the boiler heating system boiler combustion rate curve graph for having steam accumulator in embodiment.
Appended drawing reference:
100- steam boiler, 200- differential pressure power generation machine, 300- steam accumulator, 10- bypass conduit, 20- check-valves, 30-
Pressure reducing valve, 40- drain valve, 50- liquid level indicator, 60- control valve.
Specific embodiment
The contents of the present invention are described in further details with reference to the accompanying drawings and detailed description.
As shown in Figure 1, a kind of accumulation of heat regulation distributed combined heat and power generation system includes boiler system, steam stocking system two
Point.It is formed by connecting by steam boiler 100, differential pressure power generation machine 200, steam accumulator 300 and all kinds of control valves.User's steam load
It is provided by the steam that boiler and storage heater store, wherein storage heater only provides steam when steam load is more than boiler load.
Differential pressure power generation machine 200 connects the steam (vapor) outlet of steam boiler 100, and the steam (vapor) outlet of differential pressure power generation machine 200 passes through band
There are import and the heat user of the piping connection steam accumulator 300 of control valve 60；The steam (vapor) outlet of steam accumulator 300 passes through band
The piping connection of control valve 60 is generated electricity in heat user, differential pressure power generation machine 200 using the high pressure of the hot steam of steam boiler, is supplied
Electric user uses.
Further, in order to be convenient for control in system operation, in the steam (vapor) outlet and steam of differential pressure power generation machine 200
Check-valves 20 is provided on pipeline between the entrance of storage heater 300, between the steam (vapor) outlet and heat user of steam accumulator
Pressure reducing valve 30 is provided on pipeline.
Drain valve 40 is equipped with close to the side of steam boiler 100 in steam accumulator 300, it is ensured that the water in steam accumulator
Liquid level keeps homeostasis.
Liquid level indicator 50, liquid level indicator 50 and steaming are equipped with far from the side of steam boiler 100 in steam accumulator 300
Boiler furnace 100 is connected to, while monitoring the water in steam boiler and steam accumulator.
The principle of accumulation of heat regulation distributed combined heat and power generation system of the present invention are as follows: steam is passed through in steam accumulator 300, is added
Water in hot steam storage heater 300, with being constantly filled with for steam, the temperature and pressure in steam accumulator all constantly rises,
Until inflation is completed by the saturation temperature under water temperature heating to the blowing pressure；When discharging steam, according to flash principle, by subtracting
Pressure valve reduces the pressure in steam accumulator, and steam evaporates immediately, and control steam accumulator maximum steam release rate is less than maximum
Evaporation rate guarantees that the steam of release is dry saturated steam.
Further, in order to avoid the O&M expense in later period, and working efficiency is improved, in the steaming of differential pressure power generation machine 200
Pipeline between vapor outlet and the steam inlet of steam accumulator 300 bypass conduit 10 in parallel, in the steaming of steam accumulator 300
Also a bypass conduit 10 is parallel on pipeline between vapor outlet and heat user.The design of bypass conduit 10 is to go out in valve
It is conducive to repair when existing failure and does not influence to supply.
When user's steam load is relatively gentle, the variation of day part gas consumption less, then can not use steam accumulator
300, steam directly passes through pipeline and is transported to heat user end by pipeline from the steam (vapor) outlet end of differential pressure power generation machine.
Since steam accumulator 300 can only provide the supply of steam in short-term, only play a role in the peak load period,
If day part steam consumption changes greatly, there are Wave crest and wave troughs, then the steady load of steam accumulator can be used.
When load is gentle, selection can make boiler efficiency in the boiler of 60% or more size, i.e. stabilizing heat load heat
Load should be greater than the 60% of boiler continuous evaporation amount, and peak load is less than boiler maximum continuous rating.
When existing with gas, when fluctuating, extra steam is entered steam accumulator 300 from the flow path by opens check valve 20
In, according to the thermic load in heat user production time section, analysis obtains the amount and its duration of steam peak load, most
The difference of big peak load and maximum boiler continuous evaporation amount is the heat storage capacity (ton/hour) of steam accumulator 300.
The size selection of steam accumulator 300 can be carried out according to following methods:
The volume of steam accumulator is calculated according to the following formula:
Wherein, M is the maximum continuous evaporation amount of steam boiler, and Mmax is the steam peak load of steam boiler, and t is peak value
Load duration,For the condensed water heat under steam accumulator the blowing pressure P1,Go out for steam accumulator
Condensed water heat under mouth pressure P2, hfgFor heat needed for the generation 1kg saturated water under steam accumulator outlet pressure P2, F
For flash-off steam ratio.
In addition, the size of horizontal steam accumulator need to meet the following conditions:
Wherein, L is steam accumulator length, and D is steam accumulator diameter, also needs to meet simultaneously: water entrained by steam does not occur
Maximum evaporation rate S (kg/m2h) be 220 times of operating pressure P (bar g), S < 220P.
In accumulation of heat regulation distributed combined heat and power generation system operational process, in the heating system of no steam accumulator,
Steam boiler combustion rate curve is as shown in Figure 2；Have in the heating system of steam accumulator, steam boiler combustion rate such as Fig. 3 institute
Show, it is known that there is its steam boiler combustion rate of the heating system of steam accumulator gentler, steam boiler burning is more stable, for
Load curve plays the effect of peak load shifting.
The high pressure for the high-pressure hot steam that differential pressure power generation machine 200 is come out during the whole service of system using steam boiler
It generates electricity, power supply user terminal uses.While being generated electricity using high steam, steam quality is not influenced, is realized to steam
It is further utilized, plays good energy-saving effect, reduce operating cost.
Above-listed detailed description is illustrating for possible embodiments of the present invention, and the embodiment is not to limit this hair
Bright the scope of the patents, all equivalence enforcements or change without departing from carried out by the present invention, is intended to be limited solely by the scope of the patents of this case.
Claims (8)
1. a kind of accumulation of heat regulates and controls distributed combined heat and power generation system, it is characterised in that: including steam boiler, differential pressure power generation machine, steam
Storage heater, the steam (vapor) outlet of the differential pressure power generation machine connection steam boiler, the steam (vapor) outlet of the differential pressure power generation machine is by having
The import of steam accumulator described in the piping connection of control valve and heat user；The steam (vapor) outlet of the steam accumulator passes through band control
The piping connection of valve processed is generated electricity in heat user, the differential pressure power generation machine using the high steam of the steam boiler, power supply
User uses.
2. accumulation of heat according to claim 1 regulates and controls distributed combined heat and power generation system, it is characterised in that: the differential pressure power generation machine
Steam (vapor) outlet and the steam accumulator entrance between pipeline on be provided with check-valves, the steam of the steam accumulator
Pressure reducing valve is provided on pipeline between outlet and heat user.
3. accumulation of heat according to claim 2 regulates and controls distributed combined heat and power generation system, it is characterised in that: the differential pressure power generation machine
With the pipeline of a control valve bypass conduit in parallel between steam (vapor) outlet and the steam accumulator entrance.
4. accumulation of heat according to claim 2 regulates and controls distributed combined heat and power generation system, it is characterised in that: the steam accumulator
Steam (vapor) outlet and heat user between pipeline be parallel with a bypass conduit.
5. accumulation of heat according to claim 1 regulates and controls distributed combined heat and power generation system, it is characterised in that: in the steam accumulation of heat
Device is equipped with drain valve close to the side of the steam boiler, it is ensured that the water level in steam accumulator keeps homeostasis.
6. accumulation of heat according to claim 1 regulates and controls distributed combined heat and power generation system, it is characterised in that: in the steam accumulation of heat
Device is equipped with liquid level indicator far from the side of the steam boiler, and the liquid level indicator is connected to the steam boiler, simultaneously
Monitor the water in steam boiler and steam accumulator.
7. accumulation of heat according to claim 1 regulates and controls distributed combined heat and power generation system, it is characterised in that: the steam accumulator
Capacity is determined according to following methods:
Wherein, M is the maximum continuous evaporation amount of the steam boiler, MmaxFor the steam peak load of the steam boiler, t is
Peak load duration, hf1For the condensed water heat under the steam accumulator the blowing pressure P1, hf2For the steam
Condensed water heat under accumulator outlet pressure P2, hfgFor the generation 1kg saturated water under the steam accumulator outlet pressure P2
Required heat, F are flash-off steam ratio.
8. accumulation of heat according to claim 7 regulates and controls distributed combined heat and power generation system, it is characterised in that:
The steam accumulator uses horizontal steam accumulator, and size meets the following conditions:
Wherein, L is steam accumulator length, and D is steam accumulator diameter, also needs to meet simultaneously: water entrained by steam not occurring most
Big evaporation rate S is 220 times of operating pressure P, S < 220P.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811209626.8A CN109404883A (en) | 2018-10-17 | 2018-10-17 | A kind of accumulation of heat regulation distributed combined heat and power generation system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811209626.8A CN109404883A (en) | 2018-10-17 | 2018-10-17 | A kind of accumulation of heat regulation distributed combined heat and power generation system |
Publications (1)
| Publication Number | Publication Date |
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| CN109404883A true CN109404883A (en) | 2019-03-01 |
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| CN201811209626.8A Pending CN109404883A (en) | 2018-10-17 | 2018-10-17 | A kind of accumulation of heat regulation distributed combined heat and power generation system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110131001A (en) * | 2019-04-24 | 2019-08-16 | 中国神华能源股份有限公司 | The regulation method of electricity generation system and electricity generation system |
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2018
- 2018-10-17 CN CN201811209626.8A patent/CN109404883A/en active Pending
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