CN209325759U - A kind of deaerator feedwater return-flow system - Google Patents
A kind of deaerator feedwater return-flow system Download PDFInfo
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- CN209325759U CN209325759U CN201821785280.1U CN201821785280U CN209325759U CN 209325759 U CN209325759 U CN 209325759U CN 201821785280 U CN201821785280 U CN 201821785280U CN 209325759 U CN209325759 U CN 209325759U
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- water
- feed
- preheater
- flow system
- boiler
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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
- Y02E20/30—Technologies for a more efficient combustion or heat usage
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- Control Of Steam Boilers And Waste-Gas Boilers (AREA)
Abstract
The utility model relates to a kind of deaerator feedwater return-flow systems, the system includes sequentially connected feed water preheater, feed pump, oxygen-eliminating device, boiler feed pump, economizer and boiler, the feed water preheater is connected by circulation circulating pump, heat exchanger and condensate tank by bypass duct, and cold water is heated into the hot water of life by the heat exchanger.Compared with prior art, the utility model is avoided that the water for flowing to oxygen-eliminating device from feed water preheater water hammer occurs or generates vapour lock, to improve the safety of boiler operatiopn；The utilization rate of heat is improved simultaneously.
Description
Technical field
The utility model relates to boiler technology fields, and in particular to a kind of deaerator feedwater return-flow system.
Background technique
Boiler is a kind of energy conversion, and the energy inputted to boiler has chemical energy, electric energy in fuel, boiler output
Steam, high-temperature water or organic heat carrier with certain thermal energy.In the water inlet system of boiler, generally includes oxygen-eliminating device and save coal
Device.Wherein, oxygen-eliminating device is for removing the oxygen for being dissolved in water supply and other gases, prevent and reduce boiler feed pipe, economizer and
The corrosion of other auxiliary devices；Economizer is the heat exchanger that water supply is heated using boiler exhaust gas waste heat, due to entering drum
Water supply, improve water temperature by economizer, reduce the thermal stress of the drum wall because of caused by the temperature difference, so as to improve drum
Operating condition, extend the service life of drum.
The connection of the existing feed water system of boiler carries out as shown in Figure 1, purified water squeezes into feed water preheater 1 through pump
It is pumped into oxygen-eliminating device 3 after preheating by feed pump 2 and carries out deoxygenation, economizer 5 is then squeezed by boiler feed pump 4.Due to deoxygenation
The water inlet of device is according to oxygen-eliminating device liquid level not timing start and stop, and feed water preheater is water inlet free of discontinuities, this results in entering
It is low when high when the temperature of the water supply of oxygen-eliminating device, it is easy to produce water hammer and water supply vapour lock.
Utility model content
The purpose of this utility model is exactly to provide a kind of more stable, hot to overcome the problems of the above-mentioned prior art
Measure the higher deaerator feedwater return-flow system of utilization rate.
The purpose of this utility model can be achieved through the following technical solutions: a kind of deaerator feedwater return-flow system, should
System includes sequentially connected feed water preheater, feed pump, oxygen-eliminating device, boiler feed pump, economizer and boiler, and the water supply is pre-
Hot device is connected by circulation circulating pump, heat exchanger and condensate tank by bypass duct, and cold water is heated into life by the heat exchanger
The hot water applied flexibly.The utility model takes away the heat in feed water preheater, so that feed-water preheating by setting bypass duct in time
Water temperature in device is kept constant, and avoids generating water hammer and water supply vapour lock.Furthermore it is possible to which the heat in feed water preheater is filled
Divide and utilizes.
The heat exchanger is shell-and-tube heat exchanger, and tube side water inlet connect with circulating pump, tube side water outlet with coagulate
Case connection is born water, shell side water inlet is connect with cold water, and shell side water outlet is connect with hot water for life user.
No.1 solenoid valve is equipped on the connecting line of the feed pump and feed water preheater, in the circulating pump and water supply
The connecting line of preheater is equipped with No. two solenoid valves, and the No.1 solenoid valve and No. two solenoid valves are alternately opened.
The system is equipped with controller, and the controller is connect with No.1 solenoid valve and No. two solenoid valves, the oxygen-eliminating device
Interior to be equipped with liquid level sensor, the liquid level sensor is connect with controller.The utility model passes through liquid level sensor and controller
The switch of No.1 solenoid valve and No. two solenoid valves is controlled, so that the flow direction of water in feed water preheater is realized, when water in oxygen-eliminating device
When position is too low, liquid level sensor provides signal, and controller controls No.1 solenoid valve and opens, and the water in feed water preheater passes through water supply
Pump flows to oxygen-eliminating device, until the liquid level in oxygen-eliminating device reaches the upper limit, at this point, No. two electromagnetic switch are closed.When liquid level in oxygen-eliminating device
When reaching the upper limit, liquid level sensor provides signal, and controller controls No.1 solenoid valve and disconnects, and No. two solenoid valves are opened, to make
The heat obtained in feed water preheater flows to hot water for life.
Preferably, the controller is PLC controller.
The flue gas of the boiler successively discharges after economizer and feed water preheater, the design so that boiler smoke heat
Amount is fully utilized.
Compared with prior art, the beneficial effects of the utility model are embodied in following several respects:
(1) water for flowing to oxygen-eliminating device from feed water preheater is avoided water hammer occur or generate vapour lock, to improve boiler operatiopn
Safety；
(2) utilization rate of heat is improved.
Detailed description of the invention
Fig. 1 is existing boiler feed water connection schematic diagram；
Fig. 2 is the boiler feed water connection schematic diagram of the utility model.
Wherein, 1 is feed water preheater, and 2 be feed pump, and 3 be oxygen-eliminating device, and 4 be boiler feed pump, and 5 be economizer, and 6 be pot
Furnace, 7 be circulating pump, and 8 be heat exchanger, and 9 be condensate tank, and 10 be controller, and 11 be No.1 solenoid valve, and 12 be No. two electromagnetism
Valve.
Specific embodiment
It elaborates below to the embodiments of the present invention, the present embodiment before being with technical solutions of the utility model
It puts and is implemented, the detailed implementation method and specific operation process are given, but the protection scope of the utility model is unlimited
In following embodiments.
Embodiment 1
A kind of 3 water supply return-flow system of oxygen-eliminating device, process is as shown in Fig. 2, including sequentially connected feed water preheater 1, giving
Water pump 2, oxygen-eliminating device 3, boiler feed pump 42, economizer 5 and boiler 6, feed water preheater 1 are connected by circulation circulation by bypass duct
Cold water is heated into the hot water of life by pump 7, heat exchanger 8 and condensate tank 9, heat exchanger 8.
Heat exchanger 8 is shell-and-tube heat exchanger, and tube side water inlet is connect with circulating pump 7, tube side water outlet and condensed water
Case 9 connects, and shell side water inlet is connect with cold water, and shell side water outlet is connect with hot water for life user.
No.1 solenoid valve 11 is equipped on the connecting line of feed pump 2 and feed water preheater 1, it is pre- in circulating pump 7 and water supply
The connecting line of hot device 1 is equipped with No. two solenoid valves 12, and No.1 solenoid valve 11 and No. two solenoid valves 12 are alternately opened.
System is equipped with PLC controller 10, and PLC controller 10 is connect with No.1 solenoid valve 11 and No. two solenoid valves 12, deoxygenation
Liquid level sensor is equipped in device 3, liquid level sensor is connect with PLC controller 10.By liquid level sensor and PLC controller 10 come
The switch for controlling No.1 solenoid valve 11 and No. two solenoid valves 12, so that the flow direction of water in feed water preheater 1 is realized, when oxygen-eliminating device 3
When middle water level is too low, liquid level sensor provides signal, and PLC controller 10 controls No.1 solenoid valve 11 and opens, in feed water preheater 1
Water oxygen-eliminating device 3 is flowed to by feed pump 2, until the liquid level in oxygen-eliminating device 3 reaches the upper limit, at this point, No. two electromagnetic switch are closed.
When liquid level reaches the upper limit in oxygen-eliminating device 3, liquid level sensor provides signal, and PLC controller 10 controls No.1 solenoid valve 11 and disconnects,
No. two solenoid valves 12 are opened, so that the heat in feed water preheater 1 flows to hot water for life.
The flue gas of boiler successively discharges after economizer 5 and feed water preheater 1, the design so that boiler smoke heat
It is fully utilized.
Claims (6)
1. a kind of deaerator feedwater return-flow system, which includes sequentially connected feed water preheater, feed pump, oxygen-eliminating device, pot
Furnace feed pump, economizer and boiler, which is characterized in that the feed water preheater is connected by circulation circulating pump, heat by bypass duct
Cold water is heated into the hot water of life by exchanger and condensate tank, the heat exchanger.
2. a kind of deaerator feedwater return-flow system according to claim 1, which is characterized in that the heat exchanger is pipe
Shell heat exchanger, tube side water inlet are connect with circulating pump, and tube side water outlet is connect with condensate tank, shell side water inlet with it is cold
Water connection, shell side water outlet are connect with hot water for life user.
3. a kind of deaerator feedwater return-flow system according to claim 1, which is characterized in that in the feed pump and water supply
The connecting line of preheater is equipped with No.1 solenoid valve, and No. two are equipped on the connecting line of the circulating pump and feed water preheater
Solenoid valve, the No.1 solenoid valve and No. two solenoid valves are alternately opened.
4. a kind of deaerator feedwater return-flow system according to claim 3, which is characterized in that the system is equipped with control
Device, the controller are connect with No.1 solenoid valve and No. two solenoid valves, and liquid level sensor, the liquid level are equipped in the oxygen-eliminating device
Sensor is connect with controller.
5. a kind of deaerator feedwater return-flow system according to claim 4, which is characterized in that the controller is PLC control
Device processed.
6. a kind of deaerator feedwater return-flow system according to claim 1, which is characterized in that the flue gas of the boiler is successively
It is discharged after economizer and feed water preheater.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821785280.1U CN209325759U (en) | 2018-10-31 | 2018-10-31 | A kind of deaerator feedwater return-flow system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821785280.1U CN209325759U (en) | 2018-10-31 | 2018-10-31 | A kind of deaerator feedwater return-flow system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209325759U true CN209325759U (en) | 2019-08-30 |
Family
ID=67709078
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821785280.1U Active CN209325759U (en) | 2018-10-31 | 2018-10-31 | A kind of deaerator feedwater return-flow system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209325759U (en) |
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2018
- 2018-10-31 CN CN201821785280.1U patent/CN209325759U/en active Active
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