CN208967784U - CFB boiler material returning device bed material power loss loosens air feed system - Google Patents
CFB boiler material returning device bed material power loss loosens air feed system Download PDFInfo
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- CN208967784U CN208967784U CN201821721248.7U CN201821721248U CN208967784U CN 208967784 U CN208967784 U CN 208967784U CN 201821721248 U CN201821721248 U CN 201821721248U CN 208967784 U CN208967784 U CN 208967784U
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Abstract
The utility model gives a kind of CFB boiler material returning device bed material power loss loosening air feed system, including at least sequentially connected stream-jet ejector and surge tank, the outlet of the surge tank is connected to material returning device blast pipe, the steam inlet of the stream-jet ejector is connected with cold reheat vapour system or other vapour systems for meeting pressure requirements, connecting line is equipped with pneumatic on-off valve, air inlet is additionally provided on stream-jet ejector, surge tank outlet sets gradually check-valves and pneumatic air door, the meter pressure that the vapour gas gaseous mixture of material returning device is eventually entered into after surge tank is ~ 50kPa, temperature is ~ 90 DEG C, the utility model is in material return blower power loss, utilize steam pumping unit air, it forms vapour gas mixture and substitutes returning charge wind, phenomenon is killed to eliminate revert system material stock, convenient for being again started up.
Description
Technical field
The utility model relates to CFB boilers, belong to field of dynamic engineering.
Background technique
CFB boiler material returning device is one of key component of circulating fluidized bed boiler, including the charging of material returning device ontology, material returning device
Standpipe and to burner hearth discharge nozzle.By material flow pattern, material returning device can be divided into U, J or L-type, and J or L-type are initial production, substantially
It eliminates, U-shaped body lower part left and right sides is matched there are two regulating valve, and left side is feed back air-valve, and aperture is big, makes on the left of U-shaped body fluidized bed
Particle is in intensive fluidization condition；And right side loosening valve area is smaller, as long as regulated quantity guarantees on the right side of U-shaped internal fluidized bed
Particle loosen.
In this way, the particle column of splicing leg on the right side of U-shaped body is made to be in inflation slip state；And it is able to maintain in dipleg and stablizes height
It the particle column of degree and is not influenced by load fluctuation.The pressure head as possessed by the close phase particle column of this in dipleg in burner hearth than expanding
Spend pressure head caused by high opposite Discrete solid particles column and want high, thus easily cause particle automatically through on the left of U-shaped body into
Enter burner hearth, realizes that material reliably recycles.Therefore material returning device is the important portion for being related to boiler combustion, overheating steam temperature and load
Part.Good material returning device can guarantee material normal through maintaining the fast fluidized condition of combustion chamber, guarantee fuel and desulfurizing agent
It repeatedly recycles, burn repeatedly, be conducive to reach ideal burning and desulfuration efficiency.
But the material return system of many CFB boilers is abnormal in the presence of running at present, and the not smooth phenomenon of feed back especially works as electricity
When Chang Quan factory power loss or material return blower power loss, if cannot divulge information in time, material returning device is fed in standpipe and material returning device ontology and is deposited
Material carries out loose type cooling, and only leans on the natural cooling of system, it will causing material stock to kill phenomenon, (i.e. material loses flowing
Property).When electricity consumption recovery, when material returning device is again started up, returning charge wind is depended merely on, it is difficult to reach the requirement of material normal circulation power, no
Normal Matter Transfer state can be set up, the circulation of especially charging standpipe needs to carry out artificial treatment, time-consuming and laborious.
When boiler power loss, existing processing mode usually adopts low capacity material return blower since its power of motor is small
With low voltage motor, backup power source can be connected to diesel-driven generator；But for large capacity material return blower, since its power of motor is big, lead to
Frequently with high-voltage motor, and high pressure backup power source it is difficult to ensure that.At the same time, when boiler power loss, material and wear-resisting in bed
Refractory material will continue to heat release, and boiler circuit is heated in furnace, pressure rise, and when being more than safety valve jumping up pressure, boiler steam discharge is let out
Pressure, there is presently no be utilized effectively for this part working medium and energy.Therefore, the full factory's power loss of power plant or material return blower how to be avoided
Material stock caused by when power loss kills the generation of phenomenon, at the same when reducing boiler steam discharge pressure release caused by heat loss, be at present urgently
It solves the problems, such as.
Utility model content
The technical issues of the utility model is solved is providing a kind of CFB boiler material returning device bed material power loss loosening air feed system
System.
Technological means used by the utility model is as described below.
A kind of CFB boiler material returning device bed material power loss loosening air feed system, includes at least sequentially connected stream-jet ejector 12
With surge tank 13, the outlet of the surge tank is connected to material returning device blast pipe.
The steam inlet of the stream-jet ejector 12 and cold reheat vapour system 11 or other steamings for meeting pressure requirements
Vapour system is connected.
The stream-jet ejector 12 is provided with air inlet.
The surge tank outlet sets gradually check-valves and pneumatic air door.
It is arranged before the steam inlet of the stream-jet ejector 12.
The material returning device is U-shaped material returning device.
Meter pressure into the vapour gas gaseous mixture of material returning device is ~ 50kPa, and temperature is ~ 90 DEG C.
The beneficial effects of the utility model are as follows.
1, air feed when the utility model can effectively solve the problems, such as CFB boiler material returning device bed material power loss, and can be effective
Working medium and energy loss caused by boiler steam discharge pressure release when eliminating or reducing power loss.
2, air feed problem mainly passes through CFB boiler cold reheat vapour system or other when CFB boiler material return blower power loss
Meeting the energy stored by the vapour system of pressure requirements replaces electric energy to utilize steam pumping unit in material return blower power loss
Air forms vapour gas mixture substitution returning charge wind and introduces material returning device.
3, after the utility model is implemented, it is ensured that after material returning device will not be because of unexpected power loss when working normally, thermal material is long
Time calm loosening, and only cause material stock to kill phenomenon by static cooling.
4, the utility model is because of unrelated electric energy, and backup power source voltage and capacity needed for by motor are not limited, capacity configuration
Flexibly, to reduce engineering initial cost and operation power consumption.
Detailed description of the invention
Fig. 1 is that CFB boiler material returning device bed material power loss loosens air feed system schematic diagram.
Specific embodiment
The utility model protects a kind of CFB boiler material returning device bed material power loss to loosen air feed system.
As shown in Fig. 1, it is full to be mainly derived from CFB boiler cold reheat vapour system 11 or other for steam in power vapour source
The vapour system of sufficient pressure requirements, the portion of energy replace electric energy to be done in the full factory's power loss of power plant or material return blower power loss
Function.Material returning device 14 therein can be U-shaped material returning device or other material returning device types that can be used cooperatively.
It includes stream-jet ejector 12 and surge tank 13, surge tank 13 that CFB boiler material returning device bed material power loss, which loosens air feed system,
Outlet pipe is connected to the blast pipe of material returning device 14.
Safety valve 131 and drain valve 132 are provided on surge tank 13, to adjust the pressure and temperature of vapour gas gaseous mixture,
Pressure and temperature when gaseous mixture being made to discharge is respectively ~ 50kPa, ~ 90 DEG C.
In actual use, the other steam for meeting pressure requirements of steam in the cold system again of CFB boiler pass through jettron
Valve 111 enters stream-jet ejector 12 and aspirates the air of air inlet entrance, forms vapour gas gaseous mixture, which enters equal
Pressure case 13 and is adjusted to ~ 50kPa, ~ 90 DEG C of vapour gas gaseous mixture.Vapour gas mixture adjusted in the full factory's power loss of power plant or will return
Expect to replace returning charge wind to introduce in material returning device through 13 gas outlet pipe of surge tank when blower power loss, the material in material returning device is carried out
Dynamic is cooled to 260 DEG C or so, avoids thermal material calm loosening for a long time after material returning device power loss, and only occurs by static cooling
Kill phenomenon, to guarantee the noncoking in loopback of material device, keep its flowing smooth.
The utility model can effectively solve the problems, such as air feed when CFB boiler material return blower power loss, and superpressure can be made to arrange
Its working medium of some vapor put and energy are effectively utilized, and air feed problem is mainly led to when CFB boiler material return blower power loss
It crosses the cold system again of CFB boiler or other energy met stored by the vapour system of pressure requirements replaces electric energy, in material return blower
When power loss, using steam pumping unit air, forms vapour gas mixture substitution returning charge wind and spray into material returning device.To guarantee material returning device
After will not be because of unexpected power loss when normal work, thermal material calm loosening for a long time, and only material stock pressure is caused by static cooling
Dead phenomenon.After the utility model is implemented, working medium caused by the pressure release of boiler steam discharge and energy damage when can effectively eliminate or reduce power loss
It loses.
In addition, the utility model is limited as not backup power source voltage and capacity needed for by motor, capacity configuration is flexible,
Low cost, so as to reduce engineering initial cost and operation power consumption.
Claims (7)
1. a kind of CFB boiler material returning device bed material power loss loosens air feed system, which is characterized in that penetrate vapour including at least sequentially connected
Air ejector (12) and surge tank (13), the outlet of the surge tank are connected to material returning device blast pipe.
2. CFB boiler material returning device bed material power loss as described in claim 1 loosens air feed system, which is characterized in that described to penetrate vapour
The steam inlet of air ejector (12) and cold reheat vapour system (11) or other vapour systems for meeting pressure requirements are connected.
3. CFB boiler material returning device bed material power loss as described in claim 1 loosens air feed system, which is characterized in that described to penetrate vapour
Air ejector (12) is provided with air inlet.
4. CFB boiler material returning device bed material power loss as described in claim 1 loosens air feed system, which is characterized in that described to press
Case outlet sets gradually check-valves and pneumatic air door.
5. CFB boiler material returning device bed material power loss as claimed in claim 2 loosens air feed system, which is characterized in that described to penetrate vapour
Pneumatic on-off valve (111) are set before the steam inlet of air ejector (12).
6. CFB boiler material returning device bed material power loss as described in claim 1 loosens air feed system, which is characterized in that the returning charge
Device is U-shaped material returning device.
7. the CFB boiler material returning device bed material power loss as described in claim 1 to 6 is any loosens air feed system, which is characterized in that into
The meter pressure for entering the vapour gas gaseous mixture of material returning device is 50kPa, and temperature is 90 DEG C.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821721248.7U CN208967784U (en) | 2018-10-23 | 2018-10-23 | CFB boiler material returning device bed material power loss loosens air feed system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821721248.7U CN208967784U (en) | 2018-10-23 | 2018-10-23 | CFB boiler material returning device bed material power loss loosens air feed system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208967784U true CN208967784U (en) | 2019-06-11 |
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ID=66760535
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821721248.7U Active CN208967784U (en) | 2018-10-23 | 2018-10-23 | CFB boiler material returning device bed material power loss loosens air feed system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208967784U (en) |
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2018
- 2018-10-23 CN CN201821721248.7U patent/CN208967784U/en active Active
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