CN208222561U - A kind of heat supply network is hydrophobic with steam air heater UTILIZATION OF VESIDUAL HEAT IN energy conserving system - Google Patents
A kind of heat supply network is hydrophobic with steam air heater UTILIZATION OF VESIDUAL HEAT IN energy conserving system Download PDFInfo
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- CN208222561U CN208222561U CN201820474714.XU CN201820474714U CN208222561U CN 208222561 U CN208222561 U CN 208222561U CN 201820474714 U CN201820474714 U CN 201820474714U CN 208222561 U CN208222561 U CN 208222561U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/34—Indirect CO2mitigation, i.e. by acting on non CO2directly related matters of the process, e.g. pre-heating or heat recovery
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Abstract
The utility model relates to Saving energy in Steam Turbine consumption-reducing technological fields, more specifically, it is hydrophobic with steam air heater UTILIZATION OF VESIDUAL HEAT IN energy conserving system to be related to a kind of heat supply network, the system includes pressure fan, the first steam air heater, air preheater, heat exchangers for district heating, the first drainage pump, oxygen-eliminating device, steam trap and gas trap, by two concatenated steam air heaters, when guaranteeing boiler startup and non-heating period can heating boiler First air and Secondary Air.The utility model is according to the subcritical hydrophobic operating condition of thermal power plant unit heat supply network, using the hydrophobic heating boiler steam air heater of heat supply network, wind-warm syndrome is improved, reduces the auxiliary vapour dosage of unit high-quality, the hydrophobic waste heat of heat exchangers for district heating is recycled simultaneously, effectively improves unit economy and working efficiency.
Description
Technical field
The utility model relates to Saving energy in Steam Turbine consumption-reducing technological fields, more specifically, be related to a kind of heat supply network it is hydrophobic with it is warm
Wind device UTILIZATION OF VESIDUAL HEAT IN energy conserving system.
Background technique
Subcritical thermal power plant unit heat-supplying mode, which is mainly extracted steam from turbine, heats a heat supply network recirculated water through heat exchangers for district heating,
Heat exchangers for district heating is hydrophobic to be recycled to unit oxygen-eliminating device through drainage pump boosting.The country's subcritical cogeneration of heat and power machine of 2 300MW of certain power plant
Group undertakes about 15,000,000 m of concentrated supply of heating in the city area2, it is 525t/h that single unit, which designs specified steam extraction amount, and heat exchangers for district heating is dredged
Water is recycled to oxygen-eliminating device through drainage pump boosting, and design drain temperature is 104 DEG C, and design conditions oxygen-eliminating device condensed water inflow temperature is
139.4 DEG C, about 168.5 DEG C of oxygen-eliminating device leaving water temperature.
Under actual operating mode, about 110 DEG C of heat exchangers for district heating leaving water temperature, heat exchangers for district heating drain temperature about 90-100
DEG C, heat supply network is hydrophobic to be recycled to oxygen-eliminating device through drainage pump boosting, and oxygen-eliminating device is into about 136 DEG C of condensing water temperature, and oxygen-eliminating device goes out water temperature
About 168 DEG C of degree.About 90 DEG C of heat supply network drain temperature are recycled to oxygen-eliminating device through drainage pump boosting, than practical oxygen-eliminating device incoming condensing water temperature
136 DEG C relatively low 36-46 DEG C, heat exchangers for district heating hydrophobic amount about 500t/h, oxygen-eliminating device throttle flow in actual motion is caused to increase, four take out
Steam consumption increases, and increases thermal loss of steam turbine rate, affects the economy of unit.
To prevent heated surface at the end of boiler from low-temperature corrosion occurs, boiler First air, Secondary Air can be by being arranged steam air heater
Mode improves the temperature of air preheater entrance cold air, mitigates the low-temperature corrosion of air preheater.Conventional coal-fired plant boiler warm wind
The heat source of device is steam turbine low-pressure steam extraction, and steam heat is transmitted to air, reaches raising air by generally four sections or five sections of steam extractions
The purpose of temperature.Steam air heater vapour source steam generally has 100 DEG C or so of the degree of superheat, and there are biggish heat exchange temperature with cold air
There is very big loss in efficiency in difference, while steam type steam air heater can consume the steam of certain flow, increase unit heat consumption rate.
Although coming into operation for steam air heater alleviates the low-temperature corrosion of air preheater, since inlet air temperature improves, exhaust gas temperature rises,
The steam extraction of steam turbine is consumed simultaneously, so that full factory's efficiency be caused to decline.
Utility model content
In the presence of overcoming the shortcomings of the prior art, it is hydrophobic with steam air heater waste heat that the utility model provides a kind of heat supply network
Using energy conserving system,
In order to solve the above-mentioned technical problem, the technology employed by the present utility model is
A kind of heat supply network is hydrophobic with steam air heater UTILIZATION OF VESIDUAL HEAT IN energy conserving system, it is characterised in that: the system includes pressure fan, first
Steam air heater, air preheater, heat exchangers for district heating, the first drainage pump, oxygen-eliminating device, steam trap and gas trap, cold air is through pressure fan
It is sent into the first steam air heater, the air heated through the first steam air heater enters air preheater；
Bleeder steam exchanges heat through heat exchangers for district heating, heats a heat supply network recirculated water, and heat supply network recirculated water is dredged through first
It is divided into two-way after water pump boosting, is recycled to oxygen-eliminating device all the way, another way is sent to the first steam air heater, passes through and dredge after the first steam air heater of heating
Hydrophone gravity flow enters steam turbine gas trap；
First drainage pump to the first steam air heater pipeline is provided with the first isolating valve, and the first drainage pump to oxygen-eliminating device pipeline is arranged
There is the second isolating valve, third isolating valve is provided on the first steam air heater to steam trap pipeline.
Preferably, first steam air heater is water-heating type steam air heater.
Preferably, which is additionally provided with steam warming machine, in non-heating period, closes the first isolating valve and third isolation
Valve, the first steam air heater system shutdown, put into operation steam type steam air heater, is heated by auxiliary steam, it is hydrophobic through the second drainage pump enter remove
Oxygen device.
Preferably, the steam warming machine and the first steam air heater are connected on inlet air of boiler pipeline, and with pressure fan and air
Preheater connection.
Preferably, the 4th isolating valve, steam warming machine to the second drainage pump are provided on the auxiliary steam heating pipe
On be provided with the 5th isolating valve.
Preferably, after boiler startup, the first isolating valve, the second isolating valve and third isolating valve, the first steam air heater is opened and is opened
Beginning work；The 4th isolating valve and the 5th isolating valve are closed, steam warming machine stops working.
Compared with prior art, it is had the beneficial effect that possessed by the utility model
The utility model utilizes the hydrophobic heating boiler warm wind of heat supply network according to the subcritical hydrophobic operating condition of thermal power plant unit heat supply network
Device improves wind-warm syndrome, reduces the auxiliary vapour dosage of unit high-quality, while recycling the hydrophobic waste heat of heat exchangers for district heating, steam air heater is hydrophobic
Temperature and gas trap condensing water temperature are close, avoid that heat supply network is hydrophobic to enter oxygen-eliminating device, cause four pumping steam consumptions to increase, reduce four
The steam consumption of pumping reduces the steam turbine steam consumption, effectively improves unit economy and working efficiency.Heat supply network drain temperature is lower than auxiliary
Vapor (steam) temperature, hot-water type steam air heater heat transfer temperature difference are lower than steam type steam air heater, reduce loss in efficiency caused by heat transfer temperature difference.
Detailed description of the invention
Fig. 1 is that a kind of heat supply network provided by the utility model is hydrophobic with steam air heater UTILIZATION OF VESIDUAL HEAT IN energy conserving system figure.
In figure: 1 being pressure fan, 2 be the first steam air heater, 3 be air preheater, 4 be heat exchangers for district heating, 5 be first hydrophobic
Pump, 6 be oxygen-eliminating device, 7 be steam trap, 8 be gas trap, 9 be the first isolating valve, 10 be the second isolating valve, 11 be third isolating valve,
12 it is steam warming machine, 13 be the second drainage pump, 14 be the 4th isolating valve, 15 is the 5th isolating valve.
Specific embodiment
The following will be combined with the drawings in the embodiments of the present invention, carries out the technical scheme in the embodiment of the utility model
Clearly and completely describe, it is clear that the described embodiments are only a part of the embodiments of the utility model, rather than whole
Embodiment.Based on the embodiments of the present invention, those of ordinary skill in the art are without making creative work
Every other embodiment obtained, fall within the protection scope of the utility model.
As shown in Figure 1, a kind of heat supply network is hydrophobic with steam air heater UTILIZATION OF VESIDUAL HEAT IN energy conserving system, which includes pressure fan 1, first
Steam air heater 2, air preheater 3, heat exchangers for district heating 4, the first drainage pump 5, oxygen-eliminating device 6, steam trap 7 and gas trap 8, cold air warp
Pressure fan 1 is sent into the first steam air heater 2, and the air heated through the first steam air heater 2 enters air preheater 3；Bleeder steam is through heat
Net heater 4 heats a heat supply network recirculated water, and heat exchangers for district heating 4 is hydrophobic to be divided into two-way after the boosting of the first drainage pump 5, returns all the way
It receives to oxygen-eliminating device 6, another way is sent to the first steam air heater 2, coagulates through the gravity flow of steam trap 7 into steam turbine after heating the first steam air heater 2
Gas device 8；First drainage pump, 5 to the first steam air heater, 2 pipeline is provided with the first isolating valve 9, the first drainage pump 5 to 6 pipeline of oxygen-eliminating device
It is provided with the second isolating valve 10, is provided with third isolating valve 11 on the first steam air heater 2 to 7 pipeline of steam trap.The system is also set
It is equipped with steam warming machine 12, in non-heating period, the first isolating valve 9 of closing and third isolating valve 11, the first steam air heater system shutdown,
Put into operation steam type steam air heater 12, is heated by auxiliary steam, hydrophobic to enter oxygen-eliminating device, auxiliary steam heating tube through the second drainage pump 13
It is provided with the 4th isolating valve 14 on road, is provided with the 5th isolating valve 15 on 12 to the second drainage pump 13 of steam warming machine.
In the present embodiment, first steam air heater 2 is water-heating type steam air heater.
In the present embodiment, steam warming machine 12 and the first steam air heater 2 are connected on inlet air of boiler pipeline, and with pressure fan 1
It is connected with air preheater 3.
After boiler startup, the first isolating valve 9, the second isolating valve 10 and third isolating valve 11 are opened, the first steam air heater 2 starts
Work；The 4th isolating valve 14 and the 5th isolating valve 15 are closed, steam warming machine 12 stops working.
In the present embodiment, when system is run, heat supply steam extraction (0.4MPa, 245 DEG C) enters heat exchangers for district heating 4 and is changed
Heat, heats heat supply network recirculated water, and steam condensation after heat release is 104 DEG C hydrophobic, hydrophobic after the first drainage pump 5 is pressurized to 1MPa
It send to boiler water-heating type steam air heater 2, improves wind-warm syndrome to 30 DEG C, the drain temperature after heat exchange is down to 50 DEG C, and hydrophobic utilization weight position is pressed
Difference gravity flow enters steam turbine gas trap 8.In non-heating period, it is hydrophobic to the 4th isolating valve 14 of water-heating type steam air heater pipeline to close heat supply network
With steam air heater to the 5th isolating valve 15 of gas trap pipeline, the hydrophobic heating steam air heater system shutdown of heat supply network.Put into operation steam type steam air heater
2, by auxiliary steam (0.4MPa, 245 DEG C) heat, after heat release steam condensation be 140 DEG C it is hydrophobic, it is hydrophobic through the first drainage pump 5 into
Enter oxygen-eliminating device 6.
Only the preferred embodiment of the utility model is explained in detail above, but the utility model be not limited to it is above-mentioned
Embodiment can also not depart from the utility model aims within the knowledge of a person skilled in the art
Under the premise of various changes can be made, various change should be included within the scope of protection of this utility model.
Claims (6)
1. a kind of heat supply network is hydrophobic with steam air heater UTILIZATION OF VESIDUAL HEAT IN energy conserving system, it is characterised in that: the system includes pressure fan (1), the
One steam air heater (2), air preheater (3), heat exchangers for district heating (4), the first drainage pump (5), oxygen-eliminating device (6), steam trap (7) and solidifying
Gas device (8), cold air are sent into the first steam air heater (2) through pressure fan (1), and the air heated through the first steam air heater (2) enters air
Preheater (3)；
Bleeder steam heats a heat supply network recirculated water through heat exchangers for district heating (4), and heat exchangers for district heating (4) is hydrophobic through the first drainage pump
(5) it is divided into two-way after boosting, is recycled to all the way oxygen-eliminating device (6), another way is sent to the first steam air heater (2), heats the first steam air heater
(2) enter steam turbine gas trap (8) by steam trap (7) gravity flow；
First drainage pump (5) to the first steam air heater (2) pipeline is provided with the first isolating valve (9), the first drainage pump (5) to oxygen-eliminating device
(6) pipeline is provided with the second isolating valve (10), is provided with third isolating valve on the first steam air heater (2) to steam trap (7) pipeline
(11).
2. a kind of heat supply network according to claim 1 is hydrophobic with steam air heater UTILIZATION OF VESIDUAL HEAT IN energy conserving system, it is characterised in that: described
First steam air heater (2) is water-heating type steam air heater.
3. a kind of heat supply network according to claim 1 is hydrophobic with steam air heater UTILIZATION OF VESIDUAL HEAT IN energy conserving system, it is characterised in that: also set
Steam warming machine (12) are equipped with, in non-heating period, close the first isolating valve (9) and third isolating valve (11), the first steam air heater system
System is stopped transport, and is put into operation steam type steam air heater (12), is heated by auxiliary steam, hydrophobic to enter oxygen-eliminating device through the second drainage pump (13).
4. a kind of heat supply network according to claim 3 is hydrophobic with steam air heater UTILIZATION OF VESIDUAL HEAT IN energy conserving system, it is characterised in that: described
Steam warming machine (12) and the first steam air heater (2) are connected on inlet air of boiler pipeline, and with pressure fan (1) and air preheater (3)
Connection.
5. a kind of heat supply network according to claim 3 is hydrophobic with steam air heater UTILIZATION OF VESIDUAL HEAT IN energy conserving system, it is characterised in that: described
It is provided with the 4th isolating valve (14) on auxiliary steam heating pipe, is provided on steam warming machine (12) to the second drainage pump (13)
5th isolating valve (15).
6. a kind of heat supply network according to claim 5 is hydrophobic with steam air heater UTILIZATION OF VESIDUAL HEAT IN energy conserving system, it is characterised in that: boiler
After starting, the first isolating valve (9), the second isolating valve (10) and third isolating valve (11) are opened, the first steam air heater (2) starts work
Make；The 4th isolating valve (14) and the 5th isolating valve (15) are closed, steam warming machine (12) stops working.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820474714.XU CN208222561U (en) | 2018-04-04 | 2018-04-04 | A kind of heat supply network is hydrophobic with steam air heater UTILIZATION OF VESIDUAL HEAT IN energy conserving system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820474714.XU CN208222561U (en) | 2018-04-04 | 2018-04-04 | A kind of heat supply network is hydrophobic with steam air heater UTILIZATION OF VESIDUAL HEAT IN energy conserving system |
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| Publication Number | Publication Date |
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| CN208222561U true CN208222561U (en) | 2018-12-11 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201820474714.XU Active CN208222561U (en) | 2018-04-04 | 2018-04-04 | A kind of heat supply network is hydrophobic with steam air heater UTILIZATION OF VESIDUAL HEAT IN energy conserving system |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111288531A (en) * | 2020-03-31 | 2020-06-16 | 西安西热节能技术有限公司 | Emergency heating system and method based on high-low pressure bypass combined heating |
| CN111895488A (en) * | 2019-05-06 | 2020-11-06 | 河北大唐国际张家口热电有限责公司 | Steam inlet regulating valve applied to heat supply network system and control method |
| CN113513766A (en) * | 2021-06-02 | 2021-10-19 | 西安热工研究院有限公司 | System for heating air heater by using waste heat of industrial steam supply and working method |
-
2018
- 2018-04-04 CN CN201820474714.XU patent/CN208222561U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111895488A (en) * | 2019-05-06 | 2020-11-06 | 河北大唐国际张家口热电有限责公司 | Steam inlet regulating valve applied to heat supply network system and control method |
| CN111288531A (en) * | 2020-03-31 | 2020-06-16 | 西安西热节能技术有限公司 | Emergency heating system and method based on high-low pressure bypass combined heating |
| CN113513766A (en) * | 2021-06-02 | 2021-10-19 | 西安热工研究院有限公司 | System for heating air heater by using waste heat of industrial steam supply and working method |
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