CN208504376U

CN208504376U - Cinerary device for circulating fluidized bed boiler

Info

Publication number: CN208504376U
Application number: CN201820426290.XU
Authority: CN
Inventors: 吴文伟; 张星; 夏茹
Original assignee: Wuxi Huaguang Boiler Co Ltd
Current assignee: Wuxi Huaguang Environment and Energy Group Co Ltd
Priority date: 2018-03-28
Filing date: 2018-03-28
Publication date: 2019-02-15
Anticipated expiration: 2028-03-28

Abstract

The utility model relates to Circulating Fluidized Bed Boiler Equipment technical fields, specially a kind of cinerary device for circulating fluidized bed boiler, its heat that can absorb returning charge ash, ash is put in automatic control, improve security reliability, it includes putting grey cylinder, described put is ash inlet at the top of grey cylinder, bottom is ash hole, it is characterized in that, it is described to put grey cylinder and be made of the sealed connection plate between external heat-exchanging coil pipe and the pipe seam of the external heat-exchanging coil pipe, electronic Ash valve is installed at the ash inlet for putting grey cylinder, described put is equipped with internal heat coil pipe in grey cylinder, external heat-exchanging coil pipe one end is inlet, the other end protrudes into described put and connects internal heat coil pipe one end in grey cylinder, the internal heat coil pipe other end puts grey cylinder as liquid outlet through described, coolant liquid is passed through in the external heat-exchanging coil pipe and the internal heat coil pipe Body.

Description

Cinerary device for circulating fluidized bed boiler

Technical field

The utility model relates to Circulating Fluidized Bed Boiler Equipment technical fields, specially a kind of to be used for circulating fluidized bed boiler Cinerary device.

Background technique

Technology of Circulating Fluidized Bed Boiler is the efficient, clean-burning technology developed rapidly at present.It is ciculation fluidized Relatively conventional failure is coking in bed boiler operatiopn, can directly influence the safe and economic operation of boiler.Wherein, material returning device Coking is the most important thing entirely recycled.If lime-ash is accumulated excessively in material returning device, local lime-ash blocking, coking will cause, Increase abrasion, reduces boiler thermal efficiency, the serious consequence of unit outage can be caused when serious.

The ash of putting of present China recirculating fluidized bed material returning device is frequently a kind of abnormal phenomenon, because design is reasonable CFB boiler, returning charge amount with internal circulating load be it is matched, do not need frequently to put ash.For this problem, there are many problems, such as Boiler bed temperature is lower, coal adaptability is poor, load regulation range reduces (especially underrun is difficult), material return blower power output The reasons such as deficiency, boiler design defect, bed material excessive addition.Design, the operation of circulating fluidized bed boiler all need constantly to be accumulated Experience is gone perfect.Present circulating fluidized bed boiler is that interim dust leg is arranged at material returning device or puts grey cylinder, usually basic place It in closed state, needs manually to open, the grey mobility of heat is high when putting ash, easily causes the personal injury of operator.

Summary of the invention

In order to solve not accomplishing that recycling heat and automatic control put ash, the problem of security reliability difference, the utility model A kind of cinerary device for circulating fluidized bed boiler is provided, the heat of returning charge ash can be absorbed, automatic control is put ash, mentioned High safety reliability.

Its technical solution is such that a kind of cinerary device for circulating fluidized bed boiler comprising grey cylinder is put, it is described Putting at the top of grey cylinder is ash inlet, bottom is ash hole, which is characterized in that described to put grey cylinder by external heat-exchanging coil pipe and the outside Sealed connection plate between the pipe seam of heat exchange coil is constituted, and is equipped with electronic Ash valve at the ash inlet for putting grey cylinder, described It puts and internal heat coil pipe is installed in grey cylinder, external heat-exchanging coil pipe one end is that inlet, the other end protrude into and described put grey cylinder Interior connection internal heat coil pipe one end, the internal heat coil pipe other end put grey cylinder as liquid outlet, institute through described It states in external heat-exchanging coil pipe and the internal heat coil pipe and is passed through cooling liquid.

It is further characterized by the external heat-exchanging coil pipe is membrane type coil pipe；

The ash inlet is connected into ash bucket, and the electronic Ash valve is set at the top of ash bucket；

The ash hole connects ash hopper, and loose ash pipe is installed on the ash hopper side wall, and the pine ash pipe passes through wind Pipe connection loosens wind blower.

After the device of the utility model, electronic Ash valve is automatically opened when putting ash, through changing when over-discharge ash cylinder with outside Hot coil and the contact of internal heat coil pipe exchange heat, and absorb the heat of returning charge ash, and lime-ash carries out ash discharge after being cooled down again, Improve security reliability.

Detailed description of the invention

Fig. 1 is the utility model main view；

Fig. 2 is the utility model schematic diagram of internal structure.

Specific embodiment

See Fig. 1, shown in Fig. 2, a kind of cinerary device for circulating fluidized bed boiler comprising put grey cylinder 1, put grey cylinder 1 Top is connected into ash bucket 2 as ash inlet, bottom connection ash hopper 3 as ash hole, puts grey cylinder 1 by 4 He of external heat-exchanging coil pipe Sealed connection plate 5 between the pipe seam of external heat-exchanging coil pipe 4 is constituted, and sealed connection plate 5 can be effectively prevented lime-ash and change from outside Leaked out between the pipe seam of hot coil 4, into ash bucket 2 at electronic Ash valve 6 is installed, may be implemented automatically control put ash manipulation, put Internal heat coil pipe 7 is installed, 4 one end of external heat-exchanging coil pipe is inlet 11, the other end protrudes into put in grey cylinder 1 and connect in grey cylinder 1 7 one end of internal heat coil pipe is connect, 7 other end of internal heat coil pipe is used as liquid outlet 12, external heat-exchanging coil pipe 4 through ash hopper 3 With cooling liquid is passed through in internal heat coil pipe 7, generally use cooling water.External heat-exchanging coil pipe 4 uses membrane type coil pipe；Ash hopper Loose ash pipe 8 is installed on 3 side walls, loose ash pipe 8 loosens wind blower 10 by the connection of air hose 9, here uses roots blower, passes through The loosening wind of loose ash pipe 8 can be effectively prevented lime-ash and block in ash hopper 3.13 be loosening wind control valve in figure.

Due to increasing the coil pipe of heat exchange, lime-ash can be cooled down, when boiler operatiopn can be automatic in real time according to operating condition It adjusts into furnace returning charge ash quantity, easily adjusts boiler combustion and safe and reliable.Following benefit can specifically be brought: 1. adjust bed Temperature can arbitrarily adjust boiler combustion bed temperature by adjusting furnace circulating ash quantity is entered；2. adjusting load (underrun), boiler Load span section is big, by putting ash, easily realizes and runs compared with underload (about 30% boiler load)；It, can 3. coal adaptability is strong To use the biggish fuel of ash content, fuel tolerance increases；4. recycling heat, improves efficiency: the heat of returning charge ash can be absorbed Realize other utilization；5. high degree of automation, safe and reliable operation, boiler operatiopn is stablized, and is not in that burner hearth collapses grey phenomenon；6. Without manually putting ash, personal injury is avoided；7. reducing abrasion, by reducing into ashes amount, it is possible to reduce in-furnace dust concentration reduces Heating surface wear.

Claims

1. a kind of cinerary device for circulating fluidized bed boiler comprising put grey cylinder, described put is ash inlet, bottom at the top of grey cylinder Portion is ash hole, which is characterized in that described to put grey cylinder by between external heat-exchanging coil pipe and the pipe seam of the external heat-exchanging coil pipe It is tightly connected plate to constitute, electronic Ash valve is installed at the ash inlet for putting grey cylinder, described put is equipped with inside in grey cylinder and changes Hot coil, external heat-exchanging coil pipe one end is inlet, the other end protrudes into described put and connects the internal heat disk in grey cylinder Pipe one end, the internal heat coil pipe other end put grey cylinder as liquid outlet through described, the external heat-exchanging coil pipe with it is described Cooling liquid is passed through in internal heat coil pipe.

2. a kind of cinerary device for circulating fluidized bed boiler according to claim 1, which is characterized in that the outside Heat exchange coil is membrane type coil pipe.

3. a kind of cinerary device for circulating fluidized bed boiler according to claim 1, which is characterized in that described into ash Mouth is connected into ash bucket, and the electronic Ash valve is set at the top of ash bucket.

4. a kind of cinerary device for circulating fluidized bed boiler according to claim 1, which is characterized in that the ash discharge Mouth connects ash hopper, and loose ash pipe is installed on the ash hopper side wall, and the pine ash pipe passes through air hose and connects loosening wind blower.