CN217154232U - Hot primary air pipeline device - Google Patents
Hot primary air pipeline device Download PDFInfo
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- CN217154232U CN217154232U CN202220057906.7U CN202220057906U CN217154232U CN 217154232 U CN217154232 U CN 217154232U CN 202220057906 U CN202220057906 U CN 202220057906U CN 217154232 U CN217154232 U CN 217154232U
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- primary air
- hot primary
- primary
- hot air
- pipe
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- Y—GENERAL 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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/34—Indirect CO2mitigation, i.e. by acting on non CO2directly related matters of the process, e.g. pre-heating or heat recovery
Abstract
The utility model discloses a hot primary air piping installation, including hot primary air mother pipe, hot primary air collection box, hot primary air branch pipe, collection box flow straightener, collection box flow field optimizing device and branch pipe guiding device, the entry linkage air heater hot primary air storehouse export of the mother pipe of hot primary air, the entry linkage hot primary air collection box of the exit linkage of the mother pipe of hot primary air, the junction of the mother pipe of hot primary air and hot primary air collection box is the arc, set up multiple exports on the hot primary air collection box, connect the entry of hot primary air branch pipe, the junction of hot primary air collection box and hot primary air branch pipe is the arc, the exit linkage coal pulverizer of hot primary air branch pipe; the header flow equalizing device is arranged at the joint of the hot primary air main pipe and the hot primary air header, the header flow field optimizing device is arranged in the hot primary air header, and the branch pipe flow guiding device is arranged at the inlet of the hot primary air branch pipe, so that the pipe blocking phenomenon of the powder feeding pipe can be effectively eliminated, the phenomenon of increasing primary air volume due to pipe blocking is reduced, and boiler combustion is facilitated.
Description
Technical Field
The utility model relates to a hot primary air pipe device.
Background
At present, the direct-fired pulverizing system is widely applied to a coal-fired boiler. In a direct-blowing pulverizing system, two air blowers send air to two three-bin rotary air preheaters through air heaters, hot flue gas leaving a boiler transfers heat of the hot flue gas to the entering air, and heated primary air and bypass cold primary air are mixed and then enter a coal mill and carry pulverized coal to enter a pulverized coal burner; the heated secondary air enters a secondary air big air box and enters a hearth through a pulverized coal burner and an over-fire air regulator.
The coal-fired boiler adopting the direct-fired pulverizing system has two technical problems: firstly, heated primary air flows out of an outlet of the air preheater, passes through a primary air channel, is mixed in a hot primary air collection box and then is distributed to each coal mill, and due to the three-way structure characteristic of an inlet of the hot primary air collection box, vortexes are generated on two sides when the inlet of the collection box enters the collection box to generate a three-way effect, so that the inlet fluid flow rate of a nearby primary air branch pipe is high, the pressure is low, the primary air flow is low, the primary air channels at other positions are high, and the primary air flow entering the coal mills is uneven; secondly, the flow of each powder feeding pipe is uneven due to the uneven primary air volume of each coal mill, especially the phenomenon of pipe blockage caused by low air volume of the longer powder feeding pipe occurs, and the combustion of the boiler is also influenced by the uneven flow of each powder feeding pipe.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to overcome the above-mentioned not enough that exists among the prior art, and provide a hot primary air pipe device that structural design is reasonable to solve the uneven and powder feeding pipe amount of wind that arouses because of the amount of wind is uneven, stifled pipe problem of hot primary air duct amount of wind.
The utility model provides a technical scheme that above-mentioned problem adopted is: a hot primary air pipeline device is characterized by comprising a hot primary air main pipe, a hot primary air collecting box, a hot primary air branch pipe, a collecting box flow equalizing device, a collecting box flow field optimizing device and a branch pipe flow guiding device, wherein an inlet of the hot primary air main pipe is connected with an outlet of a hot primary air bin of an air preheater, an outlet of the hot primary air main pipe is connected with an inlet of the hot primary air collecting box, the joint of the hot primary air main pipe and the hot primary air collecting box is of an arc structure, a plurality of outlets are formed in the hot primary air collecting box, the outlet of the hot primary air collecting box is connected with the inlet of the hot primary air branch pipe, the joint of the hot primary air collecting box and the hot primary air branch pipe is of the arc structure, and the outlet of the hot primary air branch pipe is connected with a coal mill; the header flow equalizing device is arranged in the joint of the primary hot air main pipe and the primary hot air header, the header flow field optimizing device is arranged in the primary hot air header, the header flow field optimizing device faces the outlet of the primary hot air main pipe, and the branch pipe flow guiding device is arranged in the inlet of the primary hot air branch pipe.
Furthermore, the header flow equalizing device and the header flow field optimizing device are coaxially arranged.
Compared with the prior art, the utility model, have following advantage and effect:
1. the outlet of the primary hot air main pipe is arc-shaped, so that the vortex in the header can be effectively inhibited, and the influence of the tee joint effect on the air pressure at the inlet of the primary hot air branch pipe is eliminated;
2. the flow equalizing device is arranged in the hot primary air header, so that the flow distribution can be optimized, and the flow of each branch pipe is more even;
3. the inlet of the hot primary air branch pipe is provided with a flow guide device, so that the influence of high flow speed on the inlet of the branch pipe can be reduced, and the air inlet volume of the branch pipe is increased;
4. the air inlet amount of each coal mill is uniform, the phenomenon that the pipe of the powder feeding pipe is blocked can be effectively eliminated, the phenomenon that the primary air amount is increased due to pipe blocking is avoided, the air pressure of each powder feeding pipe is balanced, and boiler combustion is facilitated;
5. the device is static equipment, and the overhaul and maintenance amount is small.
Drawings
Fig. 1 is a schematic structural diagram of embodiment 1 of the present invention.
Fig. 2 is a schematic structural diagram of embodiment 2 of the present invention.
In the figure: the system comprises a primary hot air main pipe 1, a primary hot air collecting box 2, primary hot air branch pipes 3, a collecting box flow equalizing device 4, a collecting box flow field optimizing device 5 and branch pipe flow guiding devices 6.
Detailed Description
The present invention will be described in further detail by way of examples with reference to the accompanying drawings, which are illustrative of the present invention and are not intended to limit the present invention.
Example 1.
Referring to fig. 1, in this embodiment, a primary hot air pipeline device includes a primary hot air main pipe 1, a primary hot air collecting tank 2, primary hot air branch pipes 3, a collecting tank flow equalizing device 4, a collecting tank flow field optimizing device 5 and a branch pipe flow guiding device 6, an inlet of the primary hot air main pipe 1 is connected to an outlet of a primary hot air bin of an air preheater, an outlet of the primary hot air main pipe 1 is connected to an inlet of the primary hot air collecting tank 2, a joint of the primary hot air main pipe 1 and the primary hot air collecting tank 2 is of an arc structure, 6 outlets are arranged on the primary hot air collecting tank 2 and respectively connected to inlets of the 6 primary hot air branch pipes 3, a joint of the primary hot air collecting tank 2 and the primary hot air branch pipes 3 is of an arc structure, and outlets of the primary hot air branch pipes 3 are connected to a coal mill; the header flow equalizing device 4 is arranged in the joint of the primary hot air main pipe 1 and the primary hot air header 2, the header flow field optimizing device 5 is arranged in the primary hot air header 2, the header flow field optimizing device 5 faces the outlet of the primary hot air main pipe 1, the branch pipe flow guiding device 6 is arranged in the inlet of the primary hot air branch pipe 3, and the header flow equalizing device 4 and the header flow field optimizing device 5 are coaxially arranged.
The working principle is as follows: the hot primary air passing through the air preheater of the boiler enters the hot primary air collecting box 2 through the hot primary air main pipe 1, because the joint of the hot primary air main pipe 1 and the hot primary air collecting box 2 is in a circular arc structure, and the header flow equalizing device 4 and the header flow field optimizing device 5 are arranged, so that the vortex generated by the tee structure in the primary hot air header 2 can be effectively eliminated, the influence of the tee effect on the pressure in the primary hot air header 2 is eliminated, the flow distribution of each hot primary air branch pipe 3 can be more uniform, meanwhile, the connecting part of each hot primary air branch pipe 3 and the hot primary air header 2 is in an arc-shaped structure, and the branch pipe flow guide devices 6 are arranged at the inlets of the hot primary air branch pipes 3, so that hot primary air can enter the hot primary air branch pipes 3 more smoothly, the pressure drop is reduced, and the hot primary air finally enters the coal mills to participate in conveying and burning of coal powder. Through reasonable structure, can effectively eliminate the stifled pipe phenomenon of powder feeding pipe, reduce the phenomenon that increases once amount of wind because of avoiding stifled pipe, also make each powder feeding pipe wind pressure balanced, help the boiler burning, the device is static equipment, overhauls the maintenance volume little.
Example 2.
Referring to fig. 2, in this embodiment, a primary hot air pipeline device includes a primary hot air main pipe 1, a primary hot air collecting tank 2, primary hot air branch pipes 3, a collecting tank flow equalizing device 4, a collecting tank flow field optimizing device 5 and a branch pipe flow guiding device 6, an inlet of the primary hot air main pipe 1 is connected to an outlet of a primary hot air bin of an air preheater, an outlet of the primary hot air main pipe 1 is connected to an inlet of the primary hot air collecting tank 2, a joint of the primary hot air main pipe 1 and the primary hot air collecting tank 2 is of an arc structure, 4 outlets are arranged on the primary hot air collecting tank 2 and respectively connected to inlets of the 4 primary hot air branch pipes 3, a joint of the primary hot air collecting tank 2 and the primary hot air branch pipes 3 is of an arc structure, and outlets of the primary hot air branch pipes 3 are connected to a coal mill; the header flow equalizing device 4 is arranged in the joint of the primary hot air main pipe 1 and the primary hot air header 2, the header flow field optimizing device 5 is arranged in the primary hot air header 2, the header flow field optimizing device 5 faces the outlet of the primary hot air main pipe 1, the branch pipe flow guiding device 6 is arranged in the inlet of the primary hot air branch pipe 3, and the header flow equalizing device 4 and the header flow field optimizing device 5 are coaxially arranged.
Those not described in detail in this specification are well within the skill of the art.
In addition, it should be noted that the above contents described in the present specification are only illustrations of the structure of the present invention. All equivalent changes made according to the structure, characteristics and principle of the utility model are included in the protection scope of the utility model. Various modifications, additions and substitutions by those skilled in the art may be made to the described embodiments without departing from the scope of the invention as defined in the accompanying claims.
Claims (2)
1. A primary hot air pipeline device is characterized by comprising a primary hot air main pipe (1), a primary hot air collecting box (2), primary hot air branch pipes (3), a collecting box flow equalizing device (4), a collecting box flow field optimizing device (5) and branch pipe flow guiding devices (6), the inlet of the primary hot air main pipe (1) is connected with the outlet of the primary hot air bin of the air preheater, the outlet of the primary hot air main pipe (1) is connected with the inlet of the primary hot air header (2), the joint of the primary hot air main pipe (1) and the primary hot air header (2) is of an arc structure, a plurality of outlets are arranged on the primary hot air collecting box (2), the outlet of the primary hot air collecting box (2) is connected with the inlet of the primary hot air branch pipe (3), the joint of the hot primary air collection box (2) and the hot primary air branch pipe (3) is of an arc structure, and the outlet of the hot primary air branch pipe (3) is connected with a coal mill; the header flow equalizing device (4) is arranged in the joint of the primary hot air main pipe (1) and the primary hot air header (2), the header flow field optimizing device (5) is arranged in the primary hot air header (2), the header flow field optimizing device (5) faces the outlet of the primary hot air main pipe (1), and the branch pipe flow guiding device (6) is arranged in the inlet of the primary hot air branch pipe (3).
2. The primary hot air duct device according to claim 1, characterized in that the header flow equalizing device (4) is arranged coaxially with the header flow field optimizing device (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220057906.7U CN217154232U (en) | 2022-01-11 | 2022-01-11 | Hot primary air pipeline device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220057906.7U CN217154232U (en) | 2022-01-11 | 2022-01-11 | Hot primary air pipeline device |
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| Publication Number | Publication Date |
|---|---|
| CN217154232U true CN217154232U (en) | 2022-08-09 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220057906.7U Active CN217154232U (en) | 2022-01-11 | 2022-01-11 | Hot primary air pipeline device |
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|---|---|
| CN (1) | CN217154232U (en) |
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2022
- 2022-01-11 CN CN202220057906.7U patent/CN217154232U/en active Active
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