CN108868923A - A kind of threeway jet stream pressure and temperature reducing control system for heat supply network heat supply - Google Patents
A kind of threeway jet stream pressure and temperature reducing control system for heat supply network heat supply Download PDFInfo
- Publication number
- CN108868923A CN108868923A CN201810726936.0A CN201810726936A CN108868923A CN 108868923 A CN108868923 A CN 108868923A CN 201810726936 A CN201810726936 A CN 201810726936A CN 108868923 A CN108868923 A CN 108868923A
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- 230000001603 reducing effect Effects 0.000 title claims abstract description 12
- 239000003638 chemical reducing agent Substances 0.000 claims abstract description 35
- 238000000605 extraction Methods 0.000 claims abstract description 16
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 6
- 230000000694 effects Effects 0.000 claims abstract description 5
- 230000005540 biological transmission Effects 0.000 claims description 4
- 238000010025 steaming Methods 0.000 claims description 3
- 238000010438 heat treatment Methods 0.000 abstract description 2
- 230000005611 electricity Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000001816 cooling Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
- F01K17/00—Using steam or condensate extracted or exhausted from steam engine plant
- F01K17/02—Using steam or condensate extracted or exhausted from steam engine plant for heating purposes, e.g. industrial, domestic
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
- F01K13/00—General layout or general methods of operation of complete plants
- F01K13/02—Controlling, e.g. stopping or starting
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Control Of Turbines (AREA)
- Control Of Steam Boilers And Waste-Gas Boilers (AREA)
Abstract
The invention discloses a kind of threeway jet stream pressure and temperature reducing control systems for heat supply network heat supply, the threeway jet stream temperature-decreased pressure reducer directly carries out steam extraction from the steam inlet pipe road of steam turbine high-pressure cylinder and Steam Turbine Through IP Admission front end, it is sufficiently mixed the low-voltage high-temperature steam in the high-pressure and high-temperature steam and reheated steam pipeline in major steam line to obtain mesolow high-temperature steam by the effect of threeway jet stream temperature-decreased pressure reducer, after being cooled down using desuperheating water, the steam for heat supply network heat supply is obtained.The present invention is sufficiently mixed high-pressure and high-temperature steam and low-voltage high-temperature steam in threeway temperature-decreased pressure reducer with threeway temperature-decreased pressure reducer, obtain the low pressure steam for being suitble to heating, this mode compares with the steam extraction of steam turbine rear end, can be bigger with steam extraction amount, can be used for peak regulation of power plant and depth peak regulation.
Description
Technical field
The present invention relates to thermal power plant's thermal power plant unit monitoring technology fields more particularly to a kind of threeway for heat supply network heat supply to penetrate
Flow pressure and temperature reducing control system.
Background technique
In recent years since, as the significant changes and installed capacity in power grid of network load structure increase rapidly, power grid is daily
The peak-valley difference of load increasingly increases in operation, while the scarce capacity of power grid abandonment consumption.Cogeneration units " electricity determining by heat "
Mode is run, and peak modulation capacity is limited.Peak regulation difficulty has become in operation of power networks distinct issues the most.Peak load regulation network and thermal motor
Contradiction processing between group heat supply is bad, may influence resident's heat supply in winter safety, the relationship people's livelihood.In order to meet peak load regulation network need
It asks and living necessities of the power plant in keen competition, depth peak regulation is imperative.
Power plant mainly takes out using by pressure type steam turbine, extraction steam turbine, main steam line for heat supply network heat supply at present
Vapour is used for heat supply network heat supply.Defect by pressure type steam turbine, extraction steam turbine for heat supply network is that steam extraction amount is few, can not meet electricity
Common steam converter valve is mainly used in the purpose of factory's depth peak regulation, main steam line steam extraction, and this common steam converter valve lacks
Point is that the pressure loss is big, and energy loss is high.
Summary of the invention
According to problem of the existing technology, the invention discloses a kind of threeway jet stream pressure and temperature reducings for heat supply network heat supply
Control system, including：Boiler, balance threeway jet stream temperature-decreased pressure reducer and threeway jet stream temperature-decreased pressure reducer；The boiler it is defeated
Exit port is connected by major steam line with steam turbine high-pressure cylinder, and the output end of the steam turbine high-pressure cylinder is connected with reheater
It connects, the reheater is connected by reheated steam pipeline with Steam Turbine Through IP Admission, and the Steam Turbine Through IP Admission is low with steam turbine
Cylinder pressure is connected, and the turbine low pressure cylinder is connected with the admission end of boiler；It is pressed in the steam turbine high-pressure cylinder and steam turbine
The output vapor transmission of cylinder to balance is used in threeway jet stream temperature-decreased pressure reducer and threeway jet stream temperature-decreased pressure reducer, the threeway jet stream
The output steam of temperature-decreased pressure reducer is sent to heat supply network end by heat supply network steam pipework, connects on the threeway jet stream temperature-decreased pressure reducer
There is Electric Actuator, the Electric Actuator receives the control instruction information of the flow of control cabinet transmission；
Under working condition：The threeway jet stream temperature-decreased pressure reducer directly from steam turbine high-pressure cylinder and Steam Turbine Through IP Admission into
Steam pipe road carries out steam extraction, by the effect of threeway jet stream temperature-decreased pressure reducer by major steam line high-pressure and high-temperature steam and
Low-voltage high-temperature steam in reheated steam pipeline is sufficiently mixed to obtain mesolow high-temperature steam, is dropped using desuperheating water
Wen Hou obtains the steam for heat supply network heat supply.
Be connected on the major steam line, reheated steam pipeline and heat supply network steam pipework flowmeter, pressure transmitter and
Temperature transmitter.
The steam extraction branch of the main steam pipe road is provided with flow control valve.
The steam extraction branch road of the reheated steam pipeline is provided with shut-off valve.
By adopting the above-described technical solution, a kind of threeway jet stream pressure and temperature reducing for heat supply network heat supply provided by the invention
Control system, the present invention make high-pressure and high-temperature steam and low-voltage high-temperature steam in threeway temperature-decreased pressure reducer with threeway temperature-decreased pressure reducer
It is inside sufficiently mixed, obtains the low pressure steam for being suitble to heating, this mode compares with the steam extraction of steam turbine rear end, can be with steam extraction amount
It is bigger, it can be used for peak regulation of power plant and depth peak regulation.This mode is compared with common reducing-and-cooling plant on heat supply network, effect
Rate is high, and energy loss is low, and energy conservation is good.
Detailed description of the invention
In order to illustrate the technical solutions in the embodiments of the present application or in the prior art more clearly, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
The some embodiments recorded in application, for those of ordinary skill in the art, without creative efforts,
It is also possible to obtain other drawings based on these drawings.
Fig. 1 is the structural schematic diagram of system disclosed by the invention.
In figure：1 reheater, 2 boiler, 3 major steam line, 4 reheated steam pipeline 5 balance threeway jet stream pressure and temperature reducing
9 reheated steam pipeline branch pipeline of device 6 flow control valve, 7 shut-off valve, 8 major steam line branch pipeline, 10 threeway jet stream desuperheat subtracts
15 temperature transmitter of depressor 11 Electric Actuator, 12 heat supply network steam pipework, 13 flowmeter, 14 pressure transmitter, 16 control cabinet
17 steam turbine high-pressure cylinder, 18 Steam Turbine Through IP Admission, 19 turbine low pressure cylinder.
Specific embodiment
To keep technical solution of the present invention and advantage clearer, with reference to the attached drawing in the embodiment of the present invention, to this
Technical solution in inventive embodiments carries out clear and complete description：
A kind of threeway jet stream pressure and temperature reducing control system for heat supply network heat supply as shown in Figure 1, including boiler 2, balance
With threeway jet stream temperature-decreased pressure reducer 5, threeway jet stream temperature-decreased pressure reducer 10, steam turbine high-pressure cylinder 17, Steam Turbine Through IP Admission 18 and vapour
Turbine low pressure (LP) cylinder 19.Wherein the output port of boiler 2 is connected by major steam line 3 with the air intake of steam turbine high-pressure cylinder 17
It connects, the steam drain of the steam turbine high-pressure cylinder 17 is connected with reheater 1, and the reheater 1 passes through reheated steam pipeline 4 and vapour
The air intake of turbine intermediate pressure cylinder 18 is connected.The Steam Turbine Through IP Admission 18 is connected with turbine low pressure cylinder 19, the steamer
The steam drain of machine low pressure (LP) cylinder 19 is connected with the admission end of boiler 2.Steaming in the major steam line 3 and reheated steam pipeline 4
Vapour is sucked up in balance threeway jet stream temperature-decreased pressure reducer 5 and threeway jet stream temperature-decreased pressure reducer 10.The threeway jet stream desuperheat
The output steam of pressure reducer 10 is sent to heat supply network end by heat supply network steam pipework 12.Connect on the threeway jet stream temperature-decreased pressure reducer 10
It is connected to Electric Actuator 11, the Electric Actuator 11 receives the control instruction information for the flow that control cabinet 16 transmits.
Under working condition：Two ports of threeway jet stream temperature-decreased pressure reducer 10 are directly and the major steam line 3 of Steam Turbine
It is connected with reheated steam pipeline 4, directly from the 18 front end steam extraction of steam turbine high-pressure cylinder 17 and Steam Turbine Through IP Admission.It is penetrated by threeway
The effect of temperature-decreased pressure reducer 10 is flowed to steam the low-voltage high-temperature in the high-pressure and high-temperature steam and reheated steam pipeline 4 in major steam line 3
Vapour is sufficiently mixed, and obtains mesolow high-temperature steam, then after the desuperheating water of rear end is cooled down, and is obtained for heat supply network heat supply
Steam.
Further, it is the balance of guarantee steam turbine high-pressure cylinder 17 and the throttle flow of Steam Turbine Through IP Admission 18, installs balance additional
Control is adjusted with threeway jet stream temperature-decreased pressure reducer 5.
Further, stream is connected separately on the major steam line 3, reheated steam pipeline 4 and heat supply network steam pipework 12
Scale 13, pressure transmitter 14 and temperature transmitter 15.Under working condition：The demand of the quantity of steam of heat supply network heat supply, according to temperature
The measured value of transmitter 15, pressure transmitter 14 and flowmeter 13 issues Electric Actuator 11 by control cabinet and instructs, and adjusts
The flow of high-pressure and high-temperature steam；Instruction is issued to flow control valve 6 and shut-off valve 7 by control cabinet 16, low-voltage high-temperature is adjusted and steams
The flow of vapour and the flow of desuperheating water.
Further, into the main steam flow of threeway jet stream temperature-decreased pressure reducer 10, into threeway jet stream temperature-decreased pressure reducer
Reheated steam flow and enter the attemperation water flow of threeway jet stream temperature-decreased pressure reducer and intelligent control or can manually adjust, side
Just the flexible control of user.
Further, threeway jet stream temperature-decreased pressure reducer 10 according to heat supply network area of heat-supply service can more parallel connections meet thermic load
It is required that.
The foregoing is only a preferred embodiment of the present invention, but scope of protection of the present invention is not limited thereto,
Anyone skilled in the art in the technical scope disclosed by the present invention, according to the technique and scheme of the present invention and its
Inventive concept is subject to equivalent substitution or change, should be covered by the protection scope of the present invention.
Claims (4)
1. a kind of threeway jet stream pressure and temperature reducing control system for heat supply network heat supply, it is characterised in that including：Boiler (2), balance
With threeway jet stream temperature-decreased pressure reducer (5) and threeway jet stream temperature-decreased pressure reducer (10)；The output port of the boiler (2) passes through main steaming
Vapor pipeline (3) is connected with steam turbine high-pressure cylinder (17), and the output end of the steam turbine high-pressure cylinder (17) is connected with reheater (1)
It connects, the reheater (1) is connected by reheated steam pipeline (4) with Steam Turbine Through IP Admission (18), the Steam Turbine Through IP Admission
(18) it is connected with turbine low pressure cylinder (19), the turbine low pressure cylinder (19) is connected with the admission end of boiler (2)；It is described
The output vapor transmission of steam turbine high-pressure cylinder (17) and Steam Turbine Through IP Admission (18) extremely balance threeway jet stream temperature-decreased pressure reducer (5)
With in threeway jet stream temperature-decreased pressure reducer (10), the output steam of the threeway jet stream temperature-decreased pressure reducer (10) passes through heat supply network steam pipe
Road (12) is sent to heat supply network end, is connected with Electric Actuator (11) on the threeway jet stream temperature-decreased pressure reducer (10), described electronic
Actuator (11) receives the control instruction information of the flow of control cabinet (16) transmission；
Under working condition：The threeway jet stream temperature-decreased pressure reducer (10) is directly from steam turbine high-pressure cylinder (17) and Steam Turbine Through IP Admission
(18) steam inlet pipe road carries out steam extraction, will be in major steam line (3) by the effect of threeway jet stream temperature-decreased pressure reducer (10)
High-pressure and high-temperature steam and reheated steam pipeline (4) in low-voltage high-temperature steam be sufficiently mixed to obtain the steaming of mesolow high temperature
Vapour after being cooled down using desuperheating water, obtains the steam for heat supply network heat supply.
2. a kind of threeway jet stream pressure and temperature reducing control system for heat supply network heat supply according to claim 1, feature is also
It is：Flowmeter (13), pressure are connected on the major steam line (3), reheated steam pipeline (4) and heat supply network steam pipework (12)
Power transmitter (14) and temperature transmitter (15).
3. a kind of threeway jet stream pressure and temperature reducing control system for heat supply network heat supply according to claim 2, feature is also
It is：Steam extraction branch on the major steam line (3) is provided with flow control valve (6).
4. a kind of threeway jet stream pressure and temperature reducing control system for heat supply network heat supply according to claim 2, feature is also
It is：The steam extraction branch road of the reheated steam pipeline (4) is provided with shut-off valve (7).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810726936.0A CN108868923B (en) | 2018-07-05 | 2018-07-05 | Three-way jet flow temperature and pressure reducing control system for heat supply of heat supply network |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810726936.0A CN108868923B (en) | 2018-07-05 | 2018-07-05 | Three-way jet flow temperature and pressure reducing control system for heat supply of heat supply network |
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| Publication Number | Publication Date |
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| CN108868923A true CN108868923A (en) | 2018-11-23 |
| CN108868923B CN108868923B (en) | 2024-01-30 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112555803A (en) * | 2020-12-08 | 2021-03-26 | 西安热工研究院有限公司 | Thermoelectric generator set feed water bypass and variable main reheat steam temperature wide-range adjusting system |
| CN112682828A (en) * | 2021-01-11 | 2021-04-20 | 北京京诚科林环保科技有限公司 | Coal gas power generation double-heat-source heat supply system and method |
| CN113587175A (en) * | 2021-06-08 | 2021-11-02 | 华能国际电力江苏能源开发有限公司南通电厂 | Heat supply system and heat supply method under unit deep peak regulation state |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112555803A (en) * | 2020-12-08 | 2021-03-26 | 西安热工研究院有限公司 | Thermoelectric generator set feed water bypass and variable main reheat steam temperature wide-range adjusting system |
| CN112555803B (en) * | 2020-12-08 | 2022-11-22 | 西安热工研究院有限公司 | Thermoelectric unit feedwater bypass and become owner reheat steam temperature wide region adjustment system |
| CN112682828A (en) * | 2021-01-11 | 2021-04-20 | 北京京诚科林环保科技有限公司 | Coal gas power generation double-heat-source heat supply system and method |
| CN112682828B (en) * | 2021-01-11 | 2024-09-20 | 北京京诚科林环保科技有限公司 | Gas power generation double-heat-source heat supply system and method |
| CN113587175A (en) * | 2021-06-08 | 2021-11-02 | 华能国际电力江苏能源开发有限公司南通电厂 | Heat supply system and heat supply method under unit deep peak regulation state |
| CN113587175B (en) * | 2021-06-08 | 2023-09-29 | 华能国际电力江苏能源开发有限公司南通电厂 | Heat supply system and heat supply method in deep peak regulation state of unit |
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| CN108868923B (en) | 2024-01-30 |
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