CN205481101U - Adopt steam power boiler fan heater drainage system - Google Patents

Adopt steam power boiler fan heater drainage system Download PDF

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Publication number
CN205481101U
CN205481101U CN201620212453.5U CN201620212453U CN205481101U CN 205481101 U CN205481101 U CN 205481101U CN 201620212453 U CN201620212453 U CN 201620212453U CN 205481101 U CN205481101 U CN 205481101U
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China
Prior art keywords
steam
hydrophobic
fan heater
air heater
condenser
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CN201620212453.5U
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Chinese (zh)
Inventor
杨志勇
石磊
粘志宇
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Northeast Electric Power Design Institute of China Power Engineering Consulting Group
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Northeast Electric Power Design Institute of China Power Engineering Consulting Group
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Priority to CN201620212453.5U priority Critical patent/CN205481101U/en
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    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E20/00Combustion technologies with mitigation potential
    • Y02E20/34Indirect CO2mitigation, i.e. by acting on non CO2directly related matters of the process, e.g. pre-heating or heat recovery

Abstract

The utility model provides an adopt steam power boiler fan heater drainage system, includes wind fan heater, overgrate air fan heater, oxygen -eliminating device, condenser, its characterized in that: it has hydrophobic follow -up pressure ware to link to each other with wind fan heater and overgrate air fan heater, condensation that wind fan heater and overgrate air fan heater produced is hydrophobic flows automatically to hydrophobic follow -up pressure ware by gravity, carry all the way after the hydrophobic follow -up pressure ware pressurization to the oxygen -eliminating device and retrieve completely, another way is carried to the condenser or the drainage pipe system to the factory of directly discharging, it draws gas to be used for pressor steam to take from the steam turbine three -section, connect to hydrophobic follow -up pressure ware through drawing after the relief pressure valve decompression, the steam extraction of hydrophobic follow -up pressure ware draws connecing to condenser vapour side to be retrieved. The utility model discloses the system is simple, moves reliable and stablely, the investment reduces, and the operation maintenance cost reduce, equipment is small, and light in weight is convenient for arrange and install, hydrophobic follow -up pressure ware noiseless in service, it is shockproof, accord with national environmental protection policy.

Description

A kind of employing steam power Boiler Air Heater's draining system
Technical field
This utility model relates to power station and heating boiler draining system for steam air heater of utility.
Background technology
Boiler Air Heater's commonly uses at northern China station boiler and heating boiler, its operation principle is to use steam as thermal source heating cold air, improve the inlet temperature of boiler air preheater primary and secondary air, avoid air preheater cold-end air heat exchange element generation cold end corrosion, heat exchange element surface can be avoided to cause the stifled ash of air preheater because of dust stratification, fouling, cause the increase etc. of air and gas system resistance.Boiler Air Heater's draining system is that boiler primary and secondary air steam air heater adds the vapours recovery system by cold air cooling generation condensation water, its objective is to reclaim demineralized water and working medium heat, improves the thermal efficiency of unit.
The at present design of Boiler Air Heater's draining system mainly has two kinds of forms:
The first form is to arrange steam air heater drain tank and electric dredging devices water pump (such as Fig. 1), by hydrophobic pressurized delivered to oxygen-eliminating device.This kind of form is widely used at station boiler warm air system, can efficient recovery is hydrophobic and heat, but it is more complicated to there is system, and water pump vane easily occurs cavitation phenomenons, the problems such as system operation maintenance amount is bigger.For ensureing hydrophobic NPSH, drain tank relative hydrophobic pump wants a high position to arrange, for this part engineering is arranged on the ground by drain tank, drainage pump is arranged in the melt pit of about 3 meters, underground, therefore there is also equipment arrangement requirement condition high, takes up an area bigger problem.
The second form is to arrange steam trap (such as Fig. 2), is directly discharged to steam turbine condenser by hydrophobic.This kind of mode system is simple but is unfavorable for the recovery of heat, there is blocked drain, hydrophobic pipeline freezes to block and freeze in steam air heater heat exchanger tube and the potential safety hazard such as blocks, and is not therefore used in north cold area.
Utility model content
The purpose of this utility model is to provide one and utilizes hydrophobic automatic pressurizing device by hydrophobic for steam air heater collection and to utilize middle pressure steam to be delivered to boiler feed, simple in construction, and reliable, reduction investment, saving is taken up an area, it is simple to arranges and installs.
For achieving the above object, this utility model provides one to use steam power Boiler Air Heater's draining system, including First air steam air heater, secondary wind steam air heater, oxygen-eliminating device, condenser, it is characterized in that: be connected with hydrophobic automatic pressurizing device with First air steam air heater and secondary wind steam air heater, the condensation that First air steam air heater and secondary wind steam air heater produce is hydrophobic by flow by gravity to hydrophobic automatic pressurizing device, the outlet of hydrophobic automatic pressurizing device connects oxygen-eliminating device and condenser, after the pressurization of hydrophobic automatic pressurizing device, a road is delivered to oxygen-eliminating device and reclaims completely, another road is delivered to condenser or does not reclaim the drainage pipeline being directly discharged to plant area;Hydrophobic automatic pressurizing device is simultaneously connected with steam turbine, and the steam for pressurization is taken from three sections of steam turbine and drawn gas, and draws and be connected to hydrophobic automatic pressurizing device after being reduced pressure by air relief valve, and the steam discharge of hydrophobic automatic pressurizing device draws and is connected to Steam Side of Condenser and reclaims.
This utility model replaces steam air heater drain tank and steam air heater drainage pump by hydrophobic automatic pressurizing device, automatically runs, and only need to access a road and control power supply, stable and reliable operation;Utilize steam to instead of water pump and motor, the most there is not water pump maintenance and motor power consumption problem, there is not the problem such as noise, vibrations, therefore can improve the working condition at scene, meet national environmental protection policy, operation and maintenance cost 60,000 yuan can be saved every year;The engineering initial cost using traditional design scheme (the first form) equipment and civil engineering etc. is about 550,000 yuan, only need to be about 150,000 yuan as used hydrophobic automatic pressurizing device investment of equipment instead;Automatic pressurizing device for drainage can arrange the optional position in Factory Building as required, tradition steam air heater system arranges steam air heater drain tank and drainage pump, must take into drainage pump net positive suction head (must assure that the setting height(from bottom) of more than 3 meters between drainage pump and drain tank) on year-on-year basis, and the equipment of this system is arranged unrestricted and installs convenient, can effectively to save boiler Factory Building space.
Accompanying drawing illustrates:
Fig. 1 is the draining system figure that certain 350MW power station unit Boiler Air Heater's uses steam regulation;
Fig. 2 is the system diagram that certain 350MW power station unit Boiler Air Heater's draining system uses steam trap form;
Fig. 3 is hydrophobic automatic pressurizing device schematic diagram;
Fig. 4 is the Boiler Air Heater's draining system figure using hydrophobic automatic pressurizing device.
Detailed description of the invention
With reference to Fig. 1,1-First air steam air heater;2-secondary wind steam air heater;3-drain tank;4-drainage pump;5-oxygen-eliminating device;6-condenser;7-drainage pipeline;8-steam air heater adds vapours (equalizing main);9-shut-off valve;10-non-return valve;The electronic shut-off valve of 11-;12-electric control valve 13-restricting orifice.Medium flows to press the direction of arrow in figure.
Boiler Air Heater's uses steam regulation, and first steam air heater is hydrophobic is collected by steam air heater drain tank, is delivered to oxygen-eliminating device, in particular cases can be emitted into condenser or be emitted into plant area's drainage pipeline after being pressurizeed by drainage pump under normal circumstances.Drainage pump arranges two, and a fortune one is standby, and pump discharge pipeline sets the valve member such as non-return valve and electric control valve.
Northern area overwhelming majority boiler controller system draining system for steam air heater of utility all uses this kind of form.
With reference to Fig. 2,1-First air steam air heater;2-secondary wind steam air heater;6-condenser;7-drainage pipeline;14-steam trap;9-shut-off valve;The electronic shut-off valve of 11-.Medium flows to press the direction of arrow in figure.
This system uses steam trap form.Boiler Air Heater's uses steam regulation, and steam air heater is hydrophobic under normal circumstances flow to steam turbine condenser hydroecium after steam trap certainly, in particular cases can be emitted into plant area's drainage pipeline.
The draining system of this form is unfavorable for the recovery of heat, and safety is poor, and northern area boiler controller system seldom uses.
With reference to Fig. 3,15-water tank;16-compression chamber;17-control chamber;18-drain water piping;14-steam trap;9-shut-off valve;The electronic shut-off valve of 11-.Medium flows to press the direction of arrow in figure.
Water tank is for steam-water separation and stores part condensation water, and condensation water is flowed to compression chamber.Side, compression chamber dress Liquid level display, when liquid level reaches controller high point, inlet valve is opened, and exhaust steam valve cuts out subsequently, and pressurization gas enters, and condenses water and is discharged by check-valves pressurized;When liquid level reaches controller low spot, inlet valve cuts out, and exhaust steam valve is opened subsequently, and the gas that pressurizes is cut off, and the most indoor remaining vapour is discharged, and condensation water, by action of gravity, enters compression chamber from water tank by check-valves.
With reference to Fig. 4,1-First air steam air heater;2-secondary wind steam air heater;The hydrophobic automatic pressurizing device of 19-;5-oxygen-eliminating device;6-condenser;7-drainage pipeline;9-shut-off valve;10-non-return valve;The electronic shut-off valve of 11-;19-steam under pressure (draws gas from three sections of steam turbine);20-air relief valve;The hydrophobic automatic pressurizing device of 21-.Medium flows to press the direction of arrow in figure.
This utility model is the Boiler Air Heater's draining system using hydrophobic automatic pressurizing device, and in figure, steam air heater is hydrophobic is reclaimed by hydrophobic automatic pressurizing device and pressurizes, and is emitted into oxygen-eliminating device under normal circumstances, and special circumstances can be emitted into condenser or not reclaim and be emitted into drainage pipeline.Steam under pressure draws gas from three sections of steam turbine, causes hydrophobic automatic pressurizing device through decompression;Steam discharge after acting draw be connected to oxygen-eliminating device vapour side reclaim.
The basic engineering condition of this engineering is: boiler primary and secondary air steam air heater adds up to heating steam consumption to be 35t/h, and steam pressure 0.5MPa, vapo(u)rous temperature is 152 DEG C, oxygen-eliminating device operating pressure 0.857MPa.Being computed utilizing Power trap to be emitted into oxygen-eliminating device needs the on-way resistance overcome to be 0.86MPa, it is 1.6MPa through linking up the hydrophobic automatic pressurizing device design pressure of this engineering with producer, exert oneself 38.5t/h, and needing steam under pressure pressure is 0.96MPa, and steam consumption is about 140kg/h.Three sections of steam pressures drawn gas of this engineering steam turbine are 2.13MPa, temperature 214 DEG C, and three sections are drawn gas and need to can meet the needs of this engineering completely through decompression, and the exhaust steam after acting can be emitted into the vapour side of condenser and reclaim.

Claims (1)

1. one kind uses steam power Boiler Air Heater's draining system, including First air steam air heater, secondary wind steam air heater, oxygen-eliminating device, condenser, it is characterized in that: be connected with hydrophobic automatic pressurizing device with First air steam air heater and secondary wind steam air heater, the condensation that First air steam air heater and secondary wind steam air heater produce is hydrophobic by flow by gravity to hydrophobic automatic pressurizing device, the outlet of hydrophobic automatic pressurizing device connects oxygen-eliminating device and condenser, after the pressurization of hydrophobic automatic pressurizing device, a road is delivered to oxygen-eliminating device and reclaims completely, another road is delivered to condenser or does not reclaim the drainage pipeline being directly discharged to plant area;Hydrophobic automatic pressurizing device is simultaneously connected with steam turbine, and the steam for pressurization is taken from three sections of steam turbine and drawn gas, and draws and be connected to hydrophobic automatic pressurizing device after being reduced pressure by air relief valve, and the steam discharge of hydrophobic automatic pressurizing device draws and is connected to Steam Side of Condenser and reclaims.
CN201620212453.5U 2016-03-21 2016-03-21 Adopt steam power boiler fan heater drainage system Active CN205481101U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201620212453.5U CN205481101U (en) 2016-03-21 2016-03-21 Adopt steam power boiler fan heater drainage system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201620212453.5U CN205481101U (en) 2016-03-21 2016-03-21 Adopt steam power boiler fan heater drainage system

Publications (1)

Publication Number Publication Date
CN205481101U true CN205481101U (en) 2016-08-17

Family

ID=56653711

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201620212453.5U Active CN205481101U (en) 2016-03-21 2016-03-21 Adopt steam power boiler fan heater drainage system

Country Status (1)

Country Link
CN (1) CN205481101U (en)

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