CN210107380U - Fly ash secondary combustion air port for circulating fluidized bed boiler - Google Patents
Fly ash secondary combustion air port for circulating fluidized bed boiler Download PDFInfo
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- CN210107380U CN210107380U CN201920893693.XU CN201920893693U CN210107380U CN 210107380 U CN210107380 U CN 210107380U CN 201920893693 U CN201920893693 U CN 201920893693U CN 210107380 U CN210107380 U CN 210107380U
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Abstract
The utility model relates to a fly ash postcombustion wind gap for circulating fluidized bed boiler, including the honeycomb duct, the drainage tube, the kuppe, the water conservancy diversion awl, the filling tube, the direction slide rail, bearing spring, wherein the honeycomb duct is cylindric hollow tubular structure, its preceding terminal surface and drainage tube rear end face interconnect and coaxial distribution, terminal surface interconnect before rear end face and the kuppe, the direction slide rail encircle the honeycomb duct axis all and with honeycomb duct lateral wall internal surface interconnect, water conservancy diversion awl and the coaxial distribution of honeycomb duct, including reposition of redundant personnel cover, the conveyer pipe, connect the gusset and spray the mouth. This novel one side can effectively satisfy simultaneously and supply air and carry the needs of fly ash operation to the boiler, and on the other hand can be realized under the air supply fan power prerequisite that does not increase, effectively improve the pressure of carrying air current and fly ash in the boiler when, effectively prevent in addition in the boiler that high temperature air current from flowing back to the air supply pipeline through the wind gap and the equipment damage and the heat energy loss that cause.
Description
Technical Field
The utility model relates to an air supply device, in particular to a fly ash secondary combustion air port for a circulating fluidized bed boiler.
Background
At present, in order to effectively reduce the fly ash amount generated by boiler combustion and the phenomena of large combustible waste and the like caused by fly ash in the operation of equipment such as a circulating fluidized bed boiler and the like, the main method is to intensively collect fly ash generated by boiler combustion and then return the fly ash to the boiler again through an air supply system of the boiler for combustion so as to achieve the purposes of reducing the fly ash amount and effectively realizing full combustion of the fly ash, but in actual use, the conventional air supply port is often adopted when the fly ash is conveyed to the boiler through the air supply system, although the requirement of use can be met to a certain extent, the combustion position of the fly ash in the boiler can not be flexibly adjusted due to improper mixing ratio of the fly ash and air supply flow, so that the combustion efficiency of the fly ash is greatly influenced, and the problem is solved, although the existing mixing device is used for mixing air flow and powder fully and then delivering the mixture to a boiler for combustion through a supercharging device by means of a traditional air port device, the fly ash combustion efficiency is effectively improved, the fly ash and air flow mixing and adjusting system is complex, the operation efficiency is low, the operation energy consumption is large, the occupied area is large, the operation cost of the boiler device is increased, and the environment influence is very easy to receive, so that the fly ash cannot be reused.
Therefore, in order to solve the problem, it is urgently needed to develop a novel tuyere device to meet the requirement of practical use.
SUMMERY OF THE UTILITY MODEL
Aiming at the defects existing in the prior art, the utility model provides a fly ash secondary combustion air port for a circulating fluidized bed boiler, the novel structure is simple, the universality is good, on one hand, the requirements of air supply and fly ash conveying operation of the boiler can be effectively met, in addition, in the operation and adjustment process, no additional driving mechanism is needed, the operation energy consumption is low, the reliability is good, on the other hand, the requirement of synchronous air supply and fly ash conveying operation of the boiler is met, the mixing proportion of the airflow and the fly ash can be flexibly adjusted according to the use requirement, the combustion efficiency of the fly ash in the boiler is improved, the pressure of the airflow and the fly ash conveyed to the boiler is effectively improved on the premise of not increasing the power of an air supply fan, in addition, the device damage and the heat energy loss caused by the backflow of high-temperature air flow in the boiler to the air supply pipeline through the air port are effectively prevented.
In order to achieve the above purpose, the present invention is realized by the following technical solution:
a fly ash secondary combustion air port for a circulating fluidized bed boiler comprises a flow guide pipe, a flow guide cover, flow guide cones, a feed pipe, guide slide rails and a bearing spring, wherein the flow guide pipe is of a cylindrical hollow tubular structure, the front end surface of the flow guide pipe is connected with and coaxially distributed with the rear end surface of the flow guide pipe, the rear end surface of the flow guide pipe is connected with and coaxially distributed with the front end surface of the flow guide cover, the flow guide pipe and the flow guide cover are of a round platform-shaped hollow tubular structure, the diameter of the rear end surface is 2.5-5 times of the diameter of the front end surface, at least two guide slide rails are arranged around the axis of the flow guide pipe and are mutually connected with the inner surface of the side wall of the flow guide pipe, each guide slide rail is distributed in parallel with the axis of the flow guide pipe, the flow guide cones and, the delivery pipe is a hollow tubular structure which is coaxially distributed with the draft tube, the distance between the front end surface of the delivery pipe and the rear end surface of the drainage tube is 0-50 mm, the delivery pipe is mutually communicated with the shunt cover, the rear end surface of the delivery pipe is positioned in the draft cover, the diameter of the rear end surface of the draft cover is 3-10 times of the maximum diameter of the delivery pipe, the shunt cover is a spherical crown structure which is coaxially distributed with the delivery pipe, the distance between the shunt cover and the inner surface of the side wall of the drainage pipe is 0-30 mm, the diameter of the rear end surface of the shunt cover is 0-10 mm smaller than that of the front end surface of the drainage pipe and at least 20 mm larger than the outer diameter of the delivery pipe, a plurality of through holes are uniformly distributed on the shunt cover and are mutually communicated with the delivery pipe through the through holes, the aperture of the through holes is 1-10 mm, the axes of the through holes are all distributed in, and each sprays and connects each other in parallel and communicate each other with the filling tube between the mouth, bearing spring quantity is unanimous with direction slide rail quantity, all establish a bearing spring in every direction slide rail, and bearing spring and direction slide rail axis parallel distribution, both ends respectively with direction slide rail and connection gusset interconnect, the filling tube is at least, with honeycomb duct surface interconnect, and all establish a locating hole on the drainage tube that the filling tube corresponds and the conveyer pipe lateral wall, and through locating hole respectively with drainage tube and conveyer pipe interconnect.
Furthermore, the outer surface of the flow guide pipe is provided with a bearing keel, the cross section of the bearing keel is of a rectangular frame structure, the bearing keel is coated outside the flow guide pipe and is mutually hinged with the outer surface of the flow guide pipe through a turntable mechanism, and the axis of the flow guide pipe and the axis of the bearing keel form an included angle of 0-60 degrees.
Furthermore, a plurality of diversion holes are uniformly distributed on the side surface of the part of the conveying pipe, which is positioned in the diversion pipe, the aperture of each diversion hole is 3-5 mm, the distance between every two adjacent diversion holes is not less than 5 mm, and the axes of the diversion holes are vertically distributed with the axes of the conveying pipe.
Furthermore, when the distance between the front end face of the delivery pipe and the front end face of the flow guide pipe is 0, the distance between the flow distribution cover and the inner surface of the flow guide pipe is 0, and the front end face of the flow distribution cover and the front end face of the flow guide pipe are distributed in parallel.
Furthermore, the transverse end face of the connecting rib plate is of any one of a drop-shaped structure and a shuttle-shaped structure.
This novel simple structure, the commonality is good, can effectively satisfy the needs of supplying air and carrying the fly ash operation to the boiler simultaneously on the one hand, and in operation and accommodation process, need not to increase extra actuating mechanism, the operation energy consumption is low and good reliability, on the other hand satisfies during supplying air and fly ash synchronous transportation operation to the boiler, can be according to the use needs, nimble adjustment air current and the mixing ratio between fly ash, improve fly ash combustion efficiency in the boiler, still can realize under the air supply fan power prerequisite that does not increase, when effectively improving the pressure of carrying to the interior air current of boiler and fly ash, effectively prevent in addition that the interior high temperature air current of boiler from flowing back to the air supply pipeline through the wind gap and the equipment damage and the heat energy loss that cause.
Drawings
The present invention will be described in detail with reference to the accompanying drawings and specific embodiments.
Fig. 1 is a schematic structural diagram of the present invention.
Detailed Description
In order to make the technical means, creation features, achievement purposes and functions of the present invention easy to understand, the present invention is further described below with reference to the following embodiments.
The fly ash secondary combustion air port for the circulating fluidized bed boiler as shown in figure 1 comprises a flow guide pipe 1, a flow guide pipe 2, a flow guide cover 3, a flow guide cone 4, a feeding pipe 5, guide slide rails 6 and a bearing spring 7, wherein the flow guide pipe 1 is of a cylindrical hollow tubular structure, the front end surface of the flow guide pipe 1 is mutually connected and coaxially distributed with the rear end surface of the flow guide pipe 2, the rear end surface of the flow guide pipe 1 is mutually connected and coaxially distributed with the front end surface of the flow guide cover 3, the flow guide pipe 1 and the flow guide cover 2 are of a truncated cone-shaped hollow tubular structure, the diameter of the rear end surface is 2.5-5 times of the diameter of the front end surface, at least two guide slide rails 6 are arranged around the axis of the flow guide pipe 1 and mutually connected with the inner surface of the side wall of the flow guide pipe 1, each guide slide rail 6 is parallelly distributed with, wherein the delivery pipe 42 is positioned in the draft tube 1 and is connected with each guide slide rail 6 in the draft tube 1 in a sliding way through a connecting rib plate 43, the delivery pipe 42 is a hollow tubular structure which is distributed coaxially with the draft tube 1, the distance between the front end surface of the delivery pipe 42 and the rear end surface of the draft tube 2 is 0-50 mm and is communicated with the diversion cover 41, the rear end surface of the delivery pipe 42 is positioned in the diversion cover 3, the diameter of the rear end surface of the diversion cover 3 is 3-10 times of the maximum diameter of the delivery pipe 42, the diversion cover 41 is a spherical crown structure which is distributed coaxially with the delivery pipe 42, the distance between the diversion cover 41 which is positioned in the draft tube 2 and the inner surface of the side wall of the draft tube 2 is 0-30 mm, the diameter of the rear end surface of the diversion cover 41 and the diameter of the front end surface of the draft tube 2 is 0-10 mm smaller than the diameter of the delivery pipe 42, the axes of the through holes 45 are distributed in parallel with the axis of the conveying pipe 42, at least three spraying ports 44 are embedded in the inner surface of the conveying pipe 42 and are uniformly distributed around the axis of the conveying pipe 42, the axes of the spraying ports 44 are intersected with the axis of the conveying pipe 42 and form an included angle of 30-90 degrees, the spraying ports 44 are mutually connected in parallel and are mutually communicated with the feeding pipe 5, the number of the bearing springs 7 is consistent with that of the guide slide rails 6, one bearing spring 7 is arranged in each guide slide rail 6, the bearing springs 7 are distributed in parallel with the axes of the guide slide rails 6, two ends of each bearing spring are respectively connected with the guide slide rails 6 and the connecting rib plates 43, at least one feeding pipe 5 is connected with the outer surface of the guide pipe 1, the side walls of the drainage pipe 2 and the conveying pipe 42 corresponding to the feeding pipe 5 are respectively provided with a positioning.
The outer surface of the honeycomb duct 1 is provided with a bearing keel 1, the cross section of the bearing keel 1 is of a rectangular frame structure, the bearing keel is coated outside the honeycomb duct 1 and is mutually hinged with the outer surface of the honeycomb duct 1 through a turntable mechanism 9, and the axis of the honeycomb duct 1 and the axis of the bearing keel 1 form an included angle of 0-60 degrees.
Meanwhile, the conveying pipe 42 is positioned on the partial side surface of the draft tube 1, a plurality of guide holes 10 are uniformly distributed on the partial side surface, the aperture of each guide hole 10 is 3-5 mm, the distance between every two adjacent guide holes 10 is not less than 5 mm, and the axes of the guide holes 10 are vertically distributed with the axis of the conveying pipe 42.
It is important to point out that, when the distance between the front end surface of the delivery pipe 42 and the front end surface of the draft tube 1 is 0, the distance between the diversion cover 41 and the inner surface of the draft tube 42 is 0, and the front end surface of the diversion cover 41 and the front end surface of the draft tube 2 are distributed in parallel.
Preferably, the transverse end face of the connecting rib plate 43 is in any one of a drop-shaped structure and a shuttle-shaped structure.
This is novel in concrete implementation, at first constitutes this neotype honeycomb duct, drainage tube, kuppe, water conservancy diversion awl, filling tube, direction slide rail, bearing spring and assembles, then will assemble this neotype bearing fossil fragments outside the draft tube and be connected the location with the boiler, then communicate each other in outside air supply system through the drainage tube, through filling tube and fly ash collection system intercommunication, communicate through kuppe and boiler furnace to accomplish this novel assembly.
When synchronous air supply and fly ash adding operation are carried out, firstly, according to the air supply amount and air pressure of a plurality of high-speed jet air flows, the fly ash in a fly ash collecting system is conveyed to a spraying opening of a flow guide cone through a charging pipe and is directly sprayed into a conveying pipe through the spraying opening, then high-pressure air flow in an external air supply system is conveyed into a flow guide pipe through a drainage pipe, under the action of air flow pressure, a part of air flow on one side passes through a plurality of high-speed jet air flows of a through hole stroke on a flow distribution cover of the flow guide cone, the plurality of high-speed jet air flows directly mix and drive the fly ash sprayed in the conveying pipe, the mixed air flow is conveyed into a boiler furnace after being guided by a flow guide cover through the conveying pipe, so that the combustion operation of the fly ash conveyed into the furnace is completed, the other part of air flow drives the flow guide cover to move along a direction of the rear end surface, and the pulverized fuel enters a boiler furnace after sequentially flowing through the flow guide pipe and the flow guide sleeve, so that the purposes of air flow conveying and supplementing operation of the boiler are realized, and the combustion efficiency of fuel in the boiler and pulverized fuel ash synchronously supplemented into the boiler is improved.
In this novel operation process, the air current is drunk in the air current pressure regulation and all drives through outside air supply system wind pressure and amount of wind and this neotype carrier spring's elasticity jointly with fly ash mixed transport power, has effectively avoided the use of equipment such as auxiliary drive system to very big simplification fly ash mixed operation equipment structure, and reduced the purpose of equipment operation energy consumption.
This novel simple structure, the commonality is good, can effectively satisfy the needs of supplying air and carrying the fly ash operation to the boiler simultaneously on the one hand, and in operation and accommodation process, need not to increase extra actuating mechanism, the operation energy consumption is low and good reliability, on the other hand satisfies during supplying air and fly ash synchronous transportation operation to the boiler, can be according to the use needs, nimble adjustment air current and the mixing ratio between fly ash, improve fly ash combustion efficiency in the boiler, still can realize under the air supply fan power prerequisite that does not increase, when effectively improving the pressure of carrying to the interior air current of boiler and fly ash, effectively prevent in addition that the interior high temperature air current of boiler from flowing back to the air supply pipeline through the wind gap and the equipment damage and the heat energy loss that cause. Those skilled in the art should understand that the present invention is not limited by the above embodiments. The foregoing embodiments and description have been made only for the purpose of illustrating the principles of the invention. The present invention can be further modified and improved without departing from the spirit and scope of the present invention. Such changes and modifications are intended to be within the scope of the claimed invention. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (5)
1. A fly ash secondary combustion wind gap for a circulating fluidized bed boiler is characterized in that: the fly ash secondary combustion air port for the circulating fluidized bed boiler comprises a flow guide pipe, a flow guide cover, a flow guide cone, a feeding pipe, guide slide rails and a bearing spring, wherein the flow guide pipe is of a cylindrical hollow tubular structure, the front end surface of the flow guide pipe is connected with and coaxially distributed with the rear end surface of the flow guide pipe, the rear end surface of the flow guide pipe is connected with and coaxially distributed with the front end surface of the flow guide cover, the flow guide pipe and the flow guide cover are of a round platform-shaped hollow tubular structure, the diameter of the rear end surface is 2.5-5 times of the diameter of the front end surface, at least two guide slide rails surround the axis of the flow guide pipe and are mutually connected with the inner surface of the side wall of the flow guide pipe, each guide slide rail is parallel to the axis of the flow guide pipe, the flow guide cone and the flow guide pipe are coaxially distributed, the conveying pipe is of a hollow tubular structure which is coaxially distributed with the flow guide pipe, the distance between the front end face of the conveying pipe and the rear end face of the drainage pipe is 0-50 mm, the conveying pipe is communicated with the flow distribution cover, the rear end face of the conveying pipe is positioned in the flow guide cover, the diameter of the rear end face of the flow guide cover is 3-10 times of the maximum diameter of the conveying pipe, the flow distribution cover is of a spherical crown structure which is coaxially distributed with the conveying pipe, the distance between the flow distribution cover and the inner surface of the side wall of the drainage pipe is 0-30 mm, the diameter of the rear end face of the flow distribution cover and the diameter of the front end face of the drainage pipe are 0-10 mm smaller and at least 20 mm larger than the outer diameter of the conveying pipe, a plurality of through holes are uniformly distributed on the flow distribution cover and are communicated with the conveying pipe through the through holes, the aperture of the through, spraying mouthful axis and conveyer pipe axis and crossing and being 30-90 contained angles, and each sprays and to be interconnected and communicate each other with the filling tube between mouthful, bearing spring quantity is unanimous with direction slide rail quantity, all establishes a bearing spring in every direction slide rail, just bearing spring and direction slide rail axis parallel distribution, both ends respectively with direction slide rail and be connected gusset interconnect, the filling tube is at least, with honeycomb duct surface interconnect, and all establishes a locating hole on the drainage tube that the filling tube corresponds and the conveyer pipe lateral wall to through the locating hole respectively with drainage tube and conveyer pipe interconnect.
2. The fly ash post-combustion tuyere for the circulating fluidized bed boiler according to claim 1, wherein: the outer surface of the flow guide pipe is provided with a bearing keel, the cross section of the bearing keel is of a rectangular frame structure, the bearing keel is coated outside the flow guide pipe and is mutually hinged with the outer surface of the flow guide pipe through a rotary table mechanism, and the axis of the flow guide pipe and the axis of the bearing keel form an included angle of 0-60 degrees.
3. The fly ash post-combustion tuyere for the circulating fluidized bed boiler according to claim 1, wherein: the delivery pipe be located the honeycomb duct part on the lateral surface a plurality of water conservancy diversion holes of equipartition, water conservancy diversion hole aperture is 3-5 millimeters, and the interval is not less than 5 millimeters between two adjacent water conservancy diversion holes, and water conservancy diversion hole axis and delivery pipe axis vertical distribution.
4. The fly ash post-combustion tuyere for the circulating fluidized bed boiler according to claim 1, wherein: when the distance between the front end surface of the delivery pipe and the front end surface of the flow guide pipe is 0, the distance between the flow distribution cover and the inner surface of the drainage pipe is 0, and the front end surface of the flow distribution cover and the front end surface of the drainage pipe are distributed in parallel.
5. The fly ash post-combustion tuyere for the circulating fluidized bed boiler according to claim 1, wherein: the transverse end face of the connecting rib plate is of any one of a drop-shaped structure and a fusiform structure.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201920893693.XU CN210107380U (en) | 2019-06-14 | 2019-06-14 | Fly ash secondary combustion air port for circulating fluidized bed boiler |
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| CN201920893693.XU CN210107380U (en) | 2019-06-14 | 2019-06-14 | Fly ash secondary combustion air port for circulating fluidized bed boiler |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113161031A (en) * | 2021-04-26 | 2021-07-23 | 中国核动力研究设计院 | Buffer frame for cylindrical transport container |
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2019
- 2019-06-14 CN CN201920893693.XU patent/CN210107380U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113161031A (en) * | 2021-04-26 | 2021-07-23 | 中国核动力研究设计院 | Buffer frame for cylindrical transport container |
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