CN210824452U - Pneumatic ash conveying system of biomass boiler - Google Patents
Pneumatic ash conveying system of biomass boiler Download PDFInfo
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- CN210824452U CN210824452U CN201921486119.9U CN201921486119U CN210824452U CN 210824452 U CN210824452 U CN 210824452U CN 201921486119 U CN201921486119 U CN 201921486119U CN 210824452 U CN210824452 U CN 210824452U
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Abstract
The utility model discloses a biomass boiler pneumatic ash conveying system, include: the ash storehouse, the ash conveying units and the ash conveying units are respectively connected with the ash storehouse through ash conveying pipes; the ash conveying unit comprises a main fan, an ash hopper and a sealing pump, an ash inlet, an ash outlet and an air inlet are formed in the sealing pump, the ash hopper is connected with the ash inlet in a sealing mode, the main fan is connected with the air inlet in a sealing mode through an air conveying pipe, and the ash outlet is connected with an ash conveying pipe in a sealing mode. According to the technical scheme, low-pressure continuous conveying is realized through the air conveying pipe and the sealing pump, dry ash directly enters the sealing pump from the ash bucket, the sealing pump provides an air source through the main fan, fly ash is directly and continuously conveyed into the ash storehouse through the ash conveying pipe, and the number of valves can be effectively reduced. And the whole system adopts the main fan continuous conveying mode, does not need to switch valves, is stable in operation, safe and reliable, prolongs the service life of equipment, can effectively reduce the maintenance workload, and reduces the material cost, time cost and labor cost of maintenance or replacement.
Description
Technical Field
The utility model relates to a biomass boiler ash handling field, specificly relate to a biomass boiler pneumatic ash conveying system.
Background
At present biomass boiler generally adopts storehouse pump air conveying's mode, its system schematic diagram is shown in fig. 2, current storehouse pump air conveying system includes ash storehouse (70), dust remover ash bucket (71), storehouse pump (72), air compressor machine (73), desiccator and feeding dome valve (74), dust input storehouse pump is passed through to the dust remover ash bucket through the dome valve, the air compressor machine is used for interior pressure boost of storehouse pump, can store the dust of certain quantity temporarily in the storehouse pump when the dust is not many, the desiccator prevents that the dust of storing in the storehouse pump from weing, storehouse pump transport is a discontinuous transportation process, its concrete step is:
1. opening a feeding dome valve and an exhaust valve, and inputting dust by a bin pump at normal pressure;
2. closing the feeding dome valve and the exhaust valve, then opening the high-pressure air valve, and pressurizing the interior of the pump through an air compressor;
3. when the operation pressure is reached, the discharge valve is opened, and the dust enters the dust storage from the dust conveying pipe through the pressure.
According to the characteristics of biomass fuel, the fly ash content of a boiler is high, a pneumatic ash conveying system is in a long-term continuous operation state in the normal operation stage of the boiler, the dome valve needs to be opened and closed every time dust is added, frequent opening and closing of the dome valve can cause abrasion of a sealing ring of the dome valve, a sealing element of the dome valve of the pneumatic ash conveying system belongs to a wearing part, and once the sealing element is damaged, the pneumatic ash conveying system cannot normally operate. The problems that the ash blocking of an ash conveying system is serious, the pressure difference of a bag-type dust collector is increased, the output of an air compressor is increased, the smoke emission index exceeds the standard and the like are caused frequently. And the sealing ring of the feeding valve is frequently replaced, the feeding half-ball valve is repeatedly repaired and has poor effect, the replacement cost of the feeding valve is higher, and the maintenance difficulty is higher.
The investigation shows that 22 dome valve sealing rings are required to be replaced in a certain biomass power plant adopting a pneumatic ash conveying system of a bin pump on average every month, and at least 2 dome valve hemispherical surfaces need to be repaired every month, the maintenance workload is high, the cost is high, at least 4 hours are required for repairing and replacing the dome valve sealing rings every time, the operation of 3 bin pumps on the same side must be quitted in the period, the automation and environmental protection requirements of the power plant are difficult to meet, in addition, the load reduction operation is required for every maintenance, the operation efficiency of the power plant is reduced, the energy consumption of an air compressor and a dryer is high, and the cost is not saved.
SUMMERY OF THE UTILITY MODEL
In order to solve the problem, the utility model aims at providing a biomass boiler pneumatic ash conveying system which is suitable for the characteristics of high fly ash content of a biomass boiler, can continuously convey dust and has low cost.
The utility model adopts the technical proposal that:
a biomass boiler pneumatic ash conveying system comprises: the ash storehouse and the ash conveying units are respectively connected with the ash storehouse through ash conveying pipes; the ash conveying unit comprises a main fan, an ash hopper and a sealing pump, an ash inlet, an ash outlet and an air inlet are formed in the sealing pump, the ash hopper is connected with the ash inlet in a sealing mode, the main fan is connected with the air inlet in a sealing mode through an air conveying pipe, and the ash outlet is connected with an ash conveying pipe in a sealing mode.
Further, the main blower is a roots blower.
Furthermore, a pressure gauge is arranged on the air delivery pipe.
Furthermore, a fluidization pipe is arranged between the air conveying pipe and the material sealing pump.
Furthermore, the ash conveying unit comprises a first ash conveying unit and a second ash conveying unit, an air conveying pipe of the first ash conveying unit is connected with an air conveying pipe of the second ash conveying unit through an intermediate pipe, outlet valves are arranged at the joints of the intermediate pipe and the two air conveying pipes, and a standby fan is arranged on the intermediate pipe.
The beneficial effects of the utility model reside in that:
according to the technical scheme, low-pressure continuous conveying is realized through the air conveying pipe and the sealing pump, dry ash directly enters the sealing pump from the ash bucket, the sealing pump provides an air source through the fan, fly ash is directly and continuously conveyed into the ash storehouse through the ash conveying pipe, a dome valve is not required to be arranged at the inlet of the sealing pump, and the number of valves can be effectively reduced. And the whole system adopts the fan continuous conveying mode, does not need to switch the valve, does not have the valve phenomenon of jamming, and whole system operates steadily, and the intraductal velocity of flow of defeated ash is lower and invariable, and wearing and tearing are few, avoids stifled pipe phenomenon, and safe and reliable has improved the life of equipment, can effectively reduce maintenance work load, alleviates the material cost, the time cost and the cost of labor of maintenance or replacement.
In addition, the system conveys dust into the dust warehouse through the fan, an air compressor and a dryer do not need to be configured, the power consumption of the fan is far less than that of the air compressor and the dryer, the station service power is greatly reduced, and the operation cost of a power plant is reduced.
Drawings
FIG. 1 is a schematic view of a pneumatic ash conveying system of a biomass boiler according to the present invention;
fig. 2 is a schematic view of a conventional ash conveying system.
Detailed Description
In order to explain the technical content, the objects and the effects of the present invention in detail, the following description is made with reference to the accompanying drawings in combination with the embodiments.
As shown in fig. 1, the utility model discloses a biomass boiler pneumatic ash conveying system, include: the ash storehouse comprises an ash storehouse 1, a first ash conveying unit, a second ash conveying unit and a third ash conveying unit; defeated grey unit includes main blower 2, ash bucket 3, seal material pump 4 and defeated tuber pipe 21, seal material pump 4 top is provided with into the ash mouth, one end is provided with the ash hole, the other end is provided with the air intake, ash bucket 3 with go into ash hole sealing connection, main blower 2 passes through defeated tuber pipe 21 and air intake sealing connection, the ash hole is connected with defeated ash pipe 11 sealing connection, be provided with manometer 6 on the defeated tuber pipe 21 in order to detect pipeline pressure, defeated tuber pipe 21 is close to the bottom of being connected seal material pump 4 through fluidization pipe 5 with the one end of seal material pump 4.
In order to ensure that the ash conveying unit can continue to work when a single fan is damaged, a standby fan 24 is further arranged in the embodiment, the air conveying pipe 21 of the first ash conveying unit is hermetically connected with the air conveying pipe 21 of the second ash conveying unit through an intermediate pipe 22, the connecting parts of the intermediate pipe 22 and the two air conveying pipes 21 are provided with outlet valves 23, and the standby fan 24 is arranged on the intermediate pipe 22.
When the fan of the first ash conveying unit is damaged, the first ash conveying unit can continue to work by opening the outlet gate 23 between the middle pipe 22 and the first ash conveying unit; similarly, when the main fan 2 of the second ash conveying unit is damaged, the second ash conveying unit can continue to work by opening the outlet gate 23 between the intermediate pipe 22 and the second ash conveying unit, and the intermediate pipe 22 is provided with the standby fan 24.
Preferably, the main blower 2 and the backup blower 24 are roots blowers in this embodiment.
The ash conveying system of a certain biomass power plant can be obviously reduced in cost and improved in economic benefit after being transformed according to the technical scheme, and the reason is as follows:
firstly, the material replacement cost of the dome valve sealing ring can be saved, in the past, 22 dome valve sealing rings need to be replaced every month, the unit price is 200, therefore, the material cost can be saved by 4400 yuan every month, and about 5 ten thousand yuan can be saved all year round.
And secondly, the electric energy is saved, an air compressor and a drying machine are not required to be configured, the power of the air compressor is 55KW, the drying machine is 4KW, 1416KW is saved one day, and 516840KW is saved all the year round.
And thirdly, the manual maintenance cost can be saved, the maintenance is carried out 2 times per month on average, two persons at a time need 8 hours, the working hour cost is 300 days/person, and the manual maintenance cost is saved by 14400 yuan all the year.
And fourthly, the conventional ash conveying system needs to be maintained every month, the load of the boiler needs to be reduced for 8 hours in each maintenance, and the ash conveying system can obviously reduce the maintenance times and improve the operation efficiency of a power plant.
To sum up, the embodiment of the utility model provides a realize low pressure continuous transport through defeated tuber pipe 21 and seal material pump 4, in dry ash directly entered seal material pump 4 from ash bucket 3, seal material pump 4 provided the air supply through main fan 2, directly carry ash storehouse 1 with the flying dust through defeated ash pipe 21 in succession, the entry of seal material pump 4 need not to dispose the dome valve, can effectively reduce valve quantity. And the whole system adopts the main fan 2 continuous conveying mode, does not need to switch valves, does not have the phenomenon of valve jamming, and the whole system operates steadily, and the flow rate is lower and invariable in the ash conveying pipe 21, and wearing and tearing are few, avoid stifled pipe phenomenon, and safe and reliable has improved the life of equipment, can effectively reduce maintenance work load, alleviates the material cost, the time cost and the cost of labor of maintenance or replacement.
The above embodiments are only embodiments of the present invention, not limiting the scope of the present invention, all the equivalent transformations made by the contents of the specification and the drawings, or directly or indirectly applied to the related technical fields, are included in the protection scope of the present invention.
Claims (5)
1. A biomass boiler pneumatic ash conveying system is characterized by comprising: the ash storehouse (1) and a plurality of ash conveying units are respectively connected with the ash storehouse (1) through ash conveying pipes (11); defeated grey unit includes main fan (2), ash bucket (3) and sealing pump (4), be provided with into grey mouth, ash outlet and air intake on sealing pump (4), ash bucket (3) with go into grey mouthful sealing connection, main fan (2) are through defeated tuber pipe (21) and air intake sealing connection, ash outlet and defeated grey pipe (11) sealing connection.
2. The biomass boiler pneumatic ash conveying system according to claim 1, characterized in that: the main blower (2) is a Roots blower.
3. The biomass boiler pneumatic ash conveying system according to claim 1, characterized in that: and a pressure gauge (6) is arranged on the air delivery pipe (21).
4. The biomass boiler pneumatic ash conveying system according to claim 1, characterized in that: a fluidization pipe (5) is arranged between the air delivery pipe (21) and the material sealing pump (4).
5. The biomass boiler pneumatic ash conveying system according to claim 1, characterized in that: the ash conveying unit comprises a first ash conveying unit and a second ash conveying unit, an air conveying pipe (21) of the first ash conveying unit is connected with an air conveying pipe (21) of the second ash conveying unit through an intermediate pipe (22), outlet valves (23) are arranged at the joints of the intermediate pipe (22) and the two air conveying pipes (21), and a standby fan (24) is arranged on the intermediate pipe (22).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921486119.9U CN210824452U (en) | 2019-09-06 | 2019-09-06 | Pneumatic ash conveying system of biomass boiler |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921486119.9U CN210824452U (en) | 2019-09-06 | 2019-09-06 | Pneumatic ash conveying system of biomass boiler |
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| CN210824452U true CN210824452U (en) | 2020-06-23 |
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| CN201921486119.9U Active CN210824452U (en) | 2019-09-06 | 2019-09-06 | Pneumatic ash conveying system of biomass boiler |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112413578A (en) * | 2020-11-25 | 2021-02-26 | 安化华晟生物能源有限责任公司 | Biological generator set |
| CN112573210A (en) * | 2020-11-25 | 2021-03-30 | 安化华晟生物能源有限责任公司 | Ash conveying system |
| CN114906621A (en) * | 2022-06-30 | 2022-08-16 | 苏州娄城新材料科技有限公司 | Modified fly ash pressure conveying and mixing system and process |
-
2019
- 2019-09-06 CN CN201921486119.9U patent/CN210824452U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112413578A (en) * | 2020-11-25 | 2021-02-26 | 安化华晟生物能源有限责任公司 | Biological generator set |
| CN112573210A (en) * | 2020-11-25 | 2021-03-30 | 安化华晟生物能源有限责任公司 | Ash conveying system |
| CN112413578B (en) * | 2020-11-25 | 2023-08-08 | 安化华晟生物能源有限责任公司 | Biological generator set |
| CN114906621A (en) * | 2022-06-30 | 2022-08-16 | 苏州娄城新材料科技有限公司 | Modified fly ash pressure conveying and mixing system and process |
| CN114906621B (en) * | 2022-06-30 | 2023-12-19 | 苏州娄城新材料科技有限公司 | Modified fly ash pressure conveying mixing system and process |
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