CN207962804U - A kind of thermoelectricity decoupled system of electric boiler and heat-accumulator tank cooperation - Google Patents
A kind of thermoelectricity decoupled system of electric boiler and heat-accumulator tank cooperation Download PDFInfo
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- CN207962804U CN207962804U CN201820284833.9U CN201820284833U CN207962804U CN 207962804 U CN207962804 U CN 207962804U CN 201820284833 U CN201820284833 U CN 201820284833U CN 207962804 U CN207962804 U CN 207962804U
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Abstract
The utility model is related to a kind of electric boiler and the thermoelectricity decoupled systems of heat-accumulator tank cooperation, including electric boiler, heat-accumulator tank, limit pressure water feeding equipment heat exchanger, water circulating pump and heat supply initial station, heat supply user, the heat-accumulator tank is connected to the electric boiler, the return pipe of the heat supply user is divided into two-way, it is connect all the way with the electric boiler by valve, another way is connect by valve with heat supply initial station；The outlet pipe of the electric boiler is connect by valve with the water inlet pipe of the heat supply initial station, if the heat-accumulator tank includes dryvalve, flow measurement device, outflow regenerative apparatus.
Description
Technical field
The utility model is related to a kind of thermoelectricity decoupled systems, and in particular, to a kind of electric boiler and heat-accumulator tank cooperation
Thermoelectricity decoupled system.
Background technology
With the new energy high speed development such as wind, light, wind-powered electricity generation is gradually increased in energy resource supply proportion, because its generated output is bullied
Time condition is affected, it is desirable that the fired power generating unit in power grid has enough peak modulation capacities to ensure, wind is abandoned in reduction.The Winter heat supply phase
Between, thermal power plant unit " electricity determining by heat " mode is run, the limitation of generated output affected by hot loading, and the long-term underrun of generator is special
It is not thermic load low-valley interval to peak load regulation network scarce capacity, restricts new energy consumption and network system balanced adjustment.Although a
Super high voltage direct current electricity transmission is taken in other region, but heat supply period wind-powered electricity generation wind-abandoning phenomenon still without be improved significantly, contradiction is increasingly prominent
Go out.
The shortcomings that above-mentioned technology in the prior art, is that carrying out peak regulation by thermal power plant unit itself has 2 fatal defects, nothing
Method realizes steam power plant's thermoelectricity decoupling, cannot meet the needs of power grid depth peak regulation；Most thermal power plant units are influenced nothing by heating demand
Peak modulation capacity.Meanwhile individual thermal power plant unit peak modulation capacities are limited, cannot be satisfied the demand of power grid depth peak regulation.
Utility model content
Thoroughly to solve the above problems, the utility model provides the thermoelectricity decoupling of a kind of electric boiler and heat-accumulator tank cooperation
System can implement the decoupling of thermal power plant unit thermoelectricity, increase unit depth peak modulation capacity, solve alleviation new energy and dissolve difficult ask
Topic.
The concrete scheme of the utility model is as follows：
The thermoelectricity decoupled system of a kind of electric boiler and heat-accumulator tank cooperation, including electric boiler, heat-accumulator tank, constant pressure supply water are set
Standby heat exchanger, water circulating pump and heat supply initial station, heat supply user, the heat-accumulator tank are connected to the electric boiler, and the heat supply is used
The return pipe at family is divided into two-way, is connect all the way with the electric boiler by valve, and another way is connect by valve with heat supply initial station；It is described
The outlet pipe of electric boiler is connect by valve with the water inlet pipe of the heat supply initial station, if the heat-accumulator tank includes dryvalve, flow measurement
Device, outflow regenerative apparatus.
In a specific embodiment, the electric boiler is electric pole type hot-water boiler, electrode type steam boiler, resistance-type
One kind of boiler.
In another embodiment, the heat-accumulator tank can with electric boiler Cascade System, it is in parallel or use connection in series-parallel
Switching mode.
The system that the utility model has abandoned traditional electric boiler and the tank isolated operation that saves up strength, and used cooperation
Thermoelectricity decoupled system, system operation principle are：
1. carrying out electric-thermal energy conversion using electric boiler, then heating demand demand, electric boiler electricity are met by media for heat exchange
Source is derived from generator generator terminal, and unit online power will be reduced when electric boiler is run.
2. using electric boiler and the cooperation of heat-accumulator tank, in latter stage at the beginning of heat supply and heat supply mid-term partial period, meets and adjust
Electric energy more than needed is stored in a manner of heat to heat-accumulator tank while peak spike phase heat demand, to reduce unit online power,
The digestion capability for improving new energy, reaches power grid depth peak regulation demand.Heat and grill pan are discharged in peak regulation low-valley interval heat-accumulator tank
Stove combined heat meets peak regulation low ebb phase heat supply, peak regulation demand.This engineering uses more mature electric pole type hot-water boiler,
Water is heated using high-field electrode.It is the energy conversion device for converting electrical energy into thermal energy and transferring thermal energy to medium,
After electrode is powered, electric current makes water temperature increase by electrode and aquatic products heat amount, enters under the action of primary side water circulating pump and changes
Hot device, a hydro-thermal amount is constantly absorbed by heat exchanger secondary media (water) to be taken away, medium (water) by low-temperature-rise to high temperature, then by
Water circulating pump is sent to heat user, releases energy, and a water of electric boiler is down to low temperature by high temperature again, into electrode boiler, with this
It is reciprocal to keep heat balance.
Electrode boiler itself does not have heat storage capacity, and configuration accumulation of heat can system is as its regenerative apparatus, grill pan furnace system
The heat of generation can be stored in hot water heat storage can in the form of heat supply network recirculated water, and externally be released whenever necessary in heat supply network.
Electric boiler and heat-accumulator tank combining operation mode, cardinal principle：First, thermal loads are met by electric boiler, electricity
Boiler power supply is derived from generator generator terminal, and unit online power will be reduced when electric boiler is run.Two are reduction of unit takes out to meet
The minimum operational mode of vapour heat demand, most time unit can be run in a manner of pure condensate, to make unit have depth tune
Peak energy power.Steam power plant's thermoelectricity decoupling is realized by such method of operation.
The advantages of the utility model can obtain and effect：
1. the method for operation is flexible, according to different duty requirements, it is independent that electric boiler independent heat supply mode, heat-accumulator tank can be used
The fortune such as heat-supplying mode, electric boiler+heat-accumulator tank heat storage type, electric boiler+heat-accumulator tank exotherm, heat-accumulator tank+extraction for heat supply mode
Line mode fully achieves unit extraction for heat supply, electric boiler heat supply, heat-accumulator tank storage heat release cooperation without dead angle, according to power grid tune
Peak and the real-time continuous adjustment of heat supply network workload demand, the speed of response is fast, and the reliability of heat-supply system and safety in operation of system are high.
2. influencing smaller, unit self generating efficiency and stable on the normal operation of original unit and control logic
Property, safety also have certain promotion；
3. electric pole type electric boiler and heat-accumulator tank combining operation mode, peak regulation and heat capacity is strong, efficient, floor space
It is small, investment it is low.
4. unit load rate is higher, it is transformed without the concern for flue gas denitrification system.
5. the primary benefits using hold over system are when can further increase power plant's low ebb under same thermic load state
Section heat capacity, improves steam power plant's peak load regulation network depth.Heat-accumulator tank is seen as the buffering between heat source and heat user at this time
Device is mainly used for balancing thermic load (eliminating peak value) and provides flexibility for heat source (with transmission ＆ distribution).
6. heat-accumulator tank plays an important roll the stabilization of whole system with economical operation, in the heat supply network peakload period, store
Hot tank can be with electric boiler combined heat, flexible operation；In the heat supply network low ebb load period, heat-accumulator tank can regenerative operation, absorb grill pan
Stove after-heat.
7. other electric boiler is because so when stopping heat supply, heat-accumulator tank can carry out complementary heating in time, meet heat supply network heat supply
Demand, power grid depth peak regulation need.
8. when the explosion suddenly of heat supply network somewhere when a large amount of dehydrations, the heat-accumulator tank being directly connected to heat supply network is immediately to heat supply network moisturizing
Maintain system pressure, the accident to prevent entire heat network system and stoppage in transit.
9. one important function of heat-accumulator tank is the peak load shifting to heating system, its peak modulation capacity may replace construction spike
Heat source saves the fuel consumption of spike heat supply factory.
Since electric boiler and heat-accumulator tank start operation more flexibly, as long as power grid needs power plant to carry out depth tune
Peak, so that it may to start electric boiler, realize that thermoelectricity decoupling, depth peak modulation capacity and depth can fully meet power grid demand, from
And obtain peak regulation ancillary service compensation.
Description of the drawings
Fig. 1 is the thermoelectricity decoupled system of electric boiler and heat-accumulator tank cooperation.
Fig. 2 is the schematic diagram of accumulation of heat can system.
Specific implementation mode
To make those skilled in the art more fully understand the technical solution of the utility model, below in conjunction with the accompanying drawings and specifically
Embodiment is described in further detail the thermoelectricity decoupled system of the utility model.
Fig. 1 is the schematic diagram of the thermoelectricity decoupling system operation of electric boiler and heat-accumulator tank cooperation.
The utility model thermoelectricity decouples form, and there are two types of operational modes：
1. series operation pattern:The return water of heat user enters electric boiler 4 (closing of valve 3,4) by valve 1, adds through electric boiler 4
Enter 2 (determining whether heat-accumulator tank 1 stores heat release according to thermic load at this time) of heat supply initial station by valve 2 after heat, it is true according to heat supply situation
Fixed whether in heat supply initial station, 2 progress steam extraction continues to heat, and medium is fed directly to heat supply user 3 behind initial station.
2. parallel running mode:The return water of heat user passes through valve 1 and enters electric boiler 4 (closing of valve 2) all the way, through electric boiler 4
Enter heat supply 2 water supply pipes of initial station (determining whether heat-accumulator tank stores heat release according to thermic load at this time) by valve 3 after heating；Heat user
Return water another way by valve 4 enter heat supply initial station 2, heat supply initial station 2 carry out steam extractions continue heating confesses.Two-way, which supplies water, to be merged
Heat supply user 3 is supplied afterwards.
Fig. 2 is the schematic diagram of accumulation of heat can system.Heat-accumulator tank operating mode is divided into accumulation of heat, exothermic process.
1. heat-accumulating process：V7, V8 valve are opened, and V9 valves are closed.V2, V3, V5 valve are opened, V1, V4, and V6 valves are closed.T2 valve controls
System is surveyed into the hot water flow of heat-accumulator tank by the Q3 flows of the Q1 flow measurement devices and outflow regenerative apparatus that enter regenerative apparatus
Amount device co- controlling regenerative apparatus booster passes through flow.
2. exothermic process：V7, V8 valve are opened, and V9 valves are closed.V2, V3, V5 valve are closed, V1, V4, and V6 valves are opened.T1 valve controls
System is surveyed into the cold water flow of heat-accumulator tank by the Q1 flows of the Q3 flow measurement devices and outflow regenerative apparatus that enter regenerative apparatus
Amount device co- controlling regenerative apparatus booster passes through flow.
The carrying out practically mode of the thermoelectricity decoupled system of the present embodiment electric boiler and heat-accumulator tank cooperation includes：
Obtain depth peak regulation instruction after, operation maintenance personnel according to instruction gradually input electric boiler, electric boiler band heating demand by
Cumulative to add, the heating demand of unit steam extraction band gradually decreases, and to ensure that heating parameter is stablized during putting into operation, while gradually decreasing hair
The active power of motor carries out unit depth peak regulation, meets peak load regulation network need until power will be run down to generator minimum
It asks.
Heat supply just, latter stage, when heating demand be less than the total heating demand of electric boiler, and peak load regulation network need put into electric boiler it is complete
When portion is run, unit is run without extraction for heat supply in a manner of pure condensate, realizes the decoupling of 100% thermoelectricity, but electric boiler affected by hot loading
Limitation needs to put into heat-accumulator tank accumulation of heat, and electric boiler puts into maximum power=thermic load+regenerative load.
Heat supply mid-term, for heating demand in total heating demand of electric boiler or more, electric boiler does not have surplus capacity accumulation of heat, is not required to
Put into operation heat-accumulator tank.When heating demand heating demand total more than electric boiler, unit extraction for heat supply is needed to supplement, heating demand=electricity
Boiler puts into operation load+unit steam extraction thermic load.
In the peak regulation depth requirements relatively low period, if electric boiler operation power is less than heating demand, then heat-accumulator tank heat release is put into,
If heating parameter has not been met thermic load requirement, insufficient section is supplemented by unit steam extraction, this period is heat-accumulator tank heat release, electric boiler
Heating and unit extraction for heat supply combining operation mode, heating demand=heat-accumulator tank heat release power+electric boiler power+unit steam extraction supply
Thermal power.
It is understood that embodiment of above is merely to illustrate that the principles of the present invention and uses exemplary
Embodiment, however the utility model is not limited thereto.For those skilled in the art, this is not being departed from
In the case of the spirit and essence of utility model, various changes and modifications can be made therein, these variations and modifications are also considered as this reality
With novel protection domain.
Claims (3)
1. the thermoelectricity decoupled system of a kind of electric boiler and heat-accumulator tank cooperation, including electric boiler, heat-accumulator tank, limit pressure water feeding equipment
Heat exchanger, water circulating pump and heat supply initial station, heat supply user, the heat-accumulator tank are connected to the electric boiler, the heat supply user
Return pipe be divided into two-way, connect all the way with the electric boiler by valve, another way is connect at first stop by valve and heat supply；The electricity
The outlet pipe of boiler is connect by valve with the water inlet pipe of the heat supply initial station, if the heat-accumulator tank includes dryvalve, flow measurement dress
It sets, flow out regenerative apparatus.
2. the thermoelectricity decoupled system of a kind of electric boiler according to claim 1 and heat-accumulator tank cooperation, which is characterized in that
The electric boiler is one kind of electric pole type hot-water boiler, electrode type steam boiler, resistance-type boiler.
3. the thermoelectricity decoupled system of a kind of electric boiler according to claim 1 and heat-accumulator tank cooperation, which is characterized in that
The heat-accumulator tank can be with electric boiler Cascade System, in parallel or use connection in series-parallel switching mode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820284833.9U CN207962804U (en) | 2018-03-01 | 2018-03-01 | A kind of thermoelectricity decoupled system of electric boiler and heat-accumulator tank cooperation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820284833.9U CN207962804U (en) | 2018-03-01 | 2018-03-01 | A kind of thermoelectricity decoupled system of electric boiler and heat-accumulator tank cooperation |
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| CN207962804U true CN207962804U (en) | 2018-10-12 |
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| CN201820284833.9U Active CN207962804U (en) | 2018-03-01 | 2018-03-01 | A kind of thermoelectricity decoupled system of electric boiler and heat-accumulator tank cooperation |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109945268A (en) * | 2019-01-28 | 2019-06-28 | 太原理工大学 | A kind of heating system of Gas-steam Combined Cycle steam power plant |
-
2018
- 2018-03-01 CN CN201820284833.9U patent/CN207962804U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109945268A (en) * | 2019-01-28 | 2019-06-28 | 太原理工大学 | A kind of heating system of Gas-steam Combined Cycle steam power plant |
| CN109945268B (en) * | 2019-01-28 | 2020-08-07 | 太原理工大学 | Heating system of gas-steam combined cycle thermal power plant |
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Address after: 1113, No.5-2 Tianci street, Hunnan New District, Shenyang City, Liaoning Province Patentee after: Shenyang huizhiyuan Electric Power Development Group Co.,Ltd. Address before: 1113, No.5-2 Tianci street, Hunnan New District, Shenyang City, Liaoning Province Patentee before: SHENYANG HUIZHIYUAN POWER ENGINEERING TECHNOLOGY SERVICE Co.,Ltd. |
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Effective date of registration: 20220420 Address after: 110179 No. 863-15, shangshengou village, Hunnan District, Shenyang City, Liaoning Province (521) Patentee after: Shenyang huizhiyuan Electric Power Development Group Co.,Ltd. Patentee after: CPI northeast Energy Technology Co., Ltd Address before: 1113, No.5-2 Tianci street, Hunnan New District, Shenyang City, Liaoning Province Patentee before: Shenyang huizhiyuan Electric Power Development Group Co.,Ltd. |