CN214052061U - Hot air drainage pipeline structure of coal mill - Google Patents
Hot air drainage pipeline structure of coal mill Download PDFInfo
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- CN214052061U CN214052061U CN202022428147.4U CN202022428147U CN214052061U CN 214052061 U CN214052061 U CN 214052061U CN 202022428147 U CN202022428147 U CN 202022428147U CN 214052061 U CN214052061 U CN 214052061U
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Abstract
The utility model discloses a coal mill hot air drainage pipeline structure, including the female pipe of air inlet, the female pipe of wind-heat wind channel and a plurality of coal mill air-supply lines, the female pipe of wind-heat wind channel and the exit linkage of the female pipe of air inlet, coal mill air-supply line one end connects on the female pipe of wind-heat wind channel side by side in proper order, and the other end of coal mill air-supply line is connected with the coal mill; be provided with the transition connecting pipe between the female pipe in coal pulverizer air inlet pipeline and the wind-heat wind channel of the female pipe of wind-inlet closest to, direct connection between other coal pulverizer air inlet pipelines and the female pipe in wind-heat wind channel of once, the air intake area of transition connecting pipe is greater than the air outlet area. Set up the transition connecting pipe between the female pipe in coal pulverizer air inlet pipeline and the wind-heat wind channel that is close to the female pipe of air inlet, the transition connecting pipe adopts trapezoidal frustum structure, has solved the problem that the coal pulverizer powder pipe blockked up, has improved the powder process ability of coal pulverizer.
Description
Technical Field
The utility model relates to a coal pulverizer installation technical field, in particular to hot-blast drainage pipeline structure of coal pulverizer.
Background
Due to the fact that coal supply is short, the mixed coal for combustion in a boiler in the third period is burnt, when a medium-speed coal mill grinds inferior coal, grinding capacity is insufficient, the output of the coal mill cannot reach a design value, the maximum output of the existing coal mill is about 45-50 t/h (fluctuation according to the change condition of coal types), and the design effect of 5-1 coal mill cannot be achieved. Due to the poor separation effect of the separator of the coal mill, the designed coal powder fineness R90 is 16%, the actually measured coal powder fineness R90 is more than or equal to 25%, qualified coal powder cannot be provided for boiler combustion, and finally the carbon content of fly ash is increased, and the carbon content of large slag is high. The E2 and B5 powder pipes of the #61 furnace pulverizing system are frequently blocked, so that a coal pulverizer cannot normally operate, a unit often generates unqualified electric quantity during high load, and economic loss is caused to a company.
SUMMERY OF THE UTILITY MODEL
The utility model provides a hot-blast drainage pipeline structure of coal pulverizer to the problem that the jam appears easily in the part powder pipe among the coal pulverizer operation process at present.
In order to solve the technical problem, the utility model discloses a technical scheme as follows:
a hot air drainage pipeline structure of a coal mill comprises an air inlet main pipe, a primary air heating air channel main pipe and a plurality of coal mill air inlet pipelines, wherein the primary air heating air channel main pipe is connected with an outlet of the air inlet main pipe; a transition connecting pipe is arranged between one coal mill air inlet pipeline close to the air inlet main pipe and the primary air heating air channel main pipe in the coal mill air inlet pipeline, and the air inlet area of the transition connecting pipe is larger than the air outlet area.
Among the above-mentioned technical scheme, furtherly, be connected with two female pipes of air inlet on the female pipe of wind-heat wind channel, two the female pipe of air inlet sets up at the female pipe interval in wind-heat wind channel, the female pipe of wind-heat wind channel is gone up and is had six coal pulverizer air-supply lines at the interval in proper order, two coal pulverizer air-supply lines that are close to the female pipe of two air inlets respectively with wind-heat wind channel between female pipe be provided with the transitional coupling pipe.
Among the above-mentioned technical scheme, further, the air-out direction of the female pipe of air inlet and the air inlet direction mutually perpendicular of coal pulverizer air inlet pipeline.
Among the above-mentioned technical scheme, furtherly, the female pipe in wind-heat wind channel and coal pulverizer air-supply line are the rectangular pipe, the sectional area of the female pipe in wind-heat wind channel is greater than the sectional area of coal pulverizer air-supply line, the transition connecting pipe is trapezoidal frustum structure, the horizontal direction longitudinal section and the vertical direction longitudinal section of transition connecting pipe are trapezoidal.
In the above technical scheme, further, the width of the end face of the air inlet of the transition connecting pipe is equal to the width of the section of the primary air heating air duct main pipe, and the end face of the air outlet of the transition connecting pipe coincides with the end face of the inlet of the coal mill air inlet pipeline.
In the above technical solution, further, the longitudinal section of the transition connecting pipe in the horizontal direction is an isosceles trapezoid.
The utility model discloses the beneficial effect who has:
1) the utility model discloses in set up the transition connecting pipe between the female pipe in the coal pulverizer air-supply line that is close to the female pipe of air inlet and wind-heat wind channel, the transition connecting pipe adopts trapezoidal frustum structure, can effectively eliminate the vortex that produces at its entrance between the female pipe in this coal pulverizer air-supply line and wind-heat wind channel, simultaneously through the entry air inlet area that enlarges this coal pulverizer air-supply line, improved its air inlet amount of wind, solved the problem that corresponds the jam of coal pulverizer powder pipe, improved the powder process ability of coal pulverizer.
2) By adopting the drainage pipeline structure, the fineness of the coal powder of the coal mill is effectively reduced, the fineness of the coal powder of the coal mill is reduced from more than 25% to less than 20%, and the economical efficiency of a boiler is remarkably improved.
3) Through the improvement to the drainage pipeline structure, two coal mills that correspond in the unit exert oneself and obviously improve, and the pipeline system resistance reduces, can effectively reduce the operating current of primary air fan to the power consumption rate of coal mill powder process has been reduced, the running cost of unit has effectively been reduced.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
Fig. 2 is a top view of the present invention.
Fig. 3 is a schematic structural view of the middle transition connection pipe of the present invention.
Fig. 4 is a schematic longitudinal section view of the middle transition connection pipe in the horizontal direction of the present invention.
In the figure: 1. the coal mill air inlet pipe comprises an air inlet main pipe 2, a primary air heating air channel main pipe 3, a coal mill air inlet pipeline 4, a transition connecting pipe 401, an air inlet 402, an air outlet 5, a coal mill 6 and a coal mill powder pipe;
l1, the width of the section of the primary air heating air duct main pipe, L2, the length of the end face of the air inlet of the transition connecting pipe, L3, the width of the end face of the air inlet of the transition connecting pipe.
Detailed Description
The invention will be further described with reference to the accompanying drawings and specific embodiments.
Referring to fig. 1, the hot-blast drainage pipeline structure of coal pulverizer in this embodiment, including female pipe 1 of air inlet, the female pipe 2 in wind-heat wind channel and a plurality of coal pulverizer air-supply line 3, the female pipe 2 in wind-heat wind channel and the female exit linkage of pipe 1 of air inlet, 3 one ends of coal pulverizer air-supply line connect side by side in proper order on the female pipe 2 in wind-heat wind channel, and the other end and the coal pulverizer 5 of coal pulverizer air-supply line 3 are connected, and the female union coupling primary fan of air inlet provides wind-force for each coal pulverizer through hot-blast drainage pipeline. A transition connecting pipe 4 is arranged between one coal mill air inlet pipeline close to the air inlet main pipe in the coal mill air inlet pipelines and the primary air heating air channel main pipe, other coal mill air inlet pipelines 3 are directly connected with the primary air heating air channel main pipe 2, and the area of an air inlet 401 of the transition connecting pipe 4 is larger than the area of an air outlet 402.
Taking the actual operation condition of the generator set as an example, the generator set comprises six coal mills, as shown in fig. 2, two air inlet main pipes 1 are connected to a primary air heating duct main pipe 2, and the two air inlet main pipes 1 are respectively connected to two primary air fans to provide wind power for a pipeline system; two female pipes of air inlet 1 interval setting on the female pipe of wind-heat wind channel once, six coal pulverizer air-supply lines 3 have set up at the interval in proper order on the female pipe 2 of wind-heat wind channel once, are close to two coal pulverizer air-supply lines of the female pipe of two air inlets respectively and all are provided with transition connecting pipe 4 between the female pipe of wind-heat wind channel once, and six coal pulverizer air-supply lines 3's the other end is connected with six coal pulverizers 5 respectively.
As shown in figure 1, the air outlet direction of the air inlet main pipe 1 is perpendicular to the air inlet direction of the coal mill air inlet pipeline 3, and the air inlet main pipe 1 and the coal mill air inlet pipeline 3 are respectively connected to the adjacent two side end faces of the primary air heating air channel main pipe 2.
The structure to transition connection pipe has carried out optimal design in this embodiment to guarantee its effect, specifically as follows:
as shown in fig. 1 and 3, primary wind-heat air channel main pipe 2 and coal mill air inlet pipeline 3 are rectangular pipes, the sectional area of primary wind-heat air channel main pipe 2 is greater than that of coal mill air inlet pipeline 3, transition connecting pipe 4 is a trapezoidal frustum structure, air inlet and air outlet of transition connecting pipe are connected with primary wind-heat air channel main pipe and coal mill air inlet pipeline respectively in a matched manner, and horizontal direction longitudinal section and vertical direction longitudinal section of transition connecting pipe 4 are trapezoidal.
Preferably, the width L3 of the air inlet end face of the transition connecting pipe 4 is equal to the width L1 of the primary air heating duct main pipe section, and the air outlet end face of the transition connecting pipe 4 is coincident with the inlet end face of the coal mill air inlet pipeline 3. The length L2 of the end face of the air inlet of the transition connecting pipe is greater than or equal to the width L3 of the end face of the air inlet of the transition connecting pipe.
Preferably, as shown in fig. 4, the longitudinal section of the transition connecting pipe 4 in the horizontal direction is an isosceles trapezoid.
The present invention is not limited to the above description and drawings, but should be understood as being illustrative and not restrictive, and the technical features can be replaced and modified without creative efforts by those skilled in the art according to the technical content disclosed, all falling within the scope of the present invention.
Claims (6)
1. A hot air drainage pipeline structure of a coal mill comprises an air inlet main pipe, a primary air heating air channel main pipe and a plurality of coal mill air inlet pipelines, wherein the primary air heating air channel main pipe is connected with an outlet of the air inlet main pipe; the method is characterized in that: a transition connecting pipe is arranged between one coal mill air inlet pipeline close to the air inlet main pipe and the primary air heating air channel main pipe in the coal mill air inlet pipeline, and the air inlet area of the transition connecting pipe is larger than the air outlet area.
2. The coal mill hot air drainage pipeline structure of claim 1, characterized in that: be connected with two female pipes of air inlet on the female pipe of wind-heat wind channel, two female pipe of air inlet sets up at an interval on the female pipe of wind-heat wind channel, the interval is provided with six coal pulverizer air-supply lines in proper order on the female pipe of wind-heat wind channel, and two coal pulverizer air-supply lines that are close to two female pipes of air inlet are provided with the transitional coupling pipe respectively with between the female pipe of wind-heat wind channel.
3. The coal mill hot air diversion pipeline structure of claim 1 or 2, characterized in that: the air outlet direction of the air inlet main pipe is perpendicular to the air inlet direction of the coal mill air inlet pipeline.
4. The coal mill hot air diversion pipeline structure of claim 1 or 2, characterized in that: the primary air-heating air channel main pipe and the coal mill air inlet pipeline are rectangular pipes, the sectional area of the primary air-heating air channel main pipe is larger than that of the coal mill air inlet pipeline, the transition connecting pipe is of a trapezoidal frustum structure, and the horizontal direction longitudinal section and the vertical direction longitudinal section of the transition connecting pipe are both trapezoidal.
5. The coal mill hot air flow guiding pipeline structure of claim 4, characterized in that: the width of the end face of the air inlet of the transition connecting pipe is equal to the width of the section of the primary air heating air channel main pipe, and the end face of the air outlet of the transition connecting pipe coincides with the end face of the inlet of the coal mill air inlet pipeline.
6. The coal mill hot air flow guiding pipeline structure of claim 4, characterized in that: the longitudinal section of the transition connecting pipe in the horizontal direction is in an isosceles trapezoid shape.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022428147.4U CN214052061U (en) | 2020-10-27 | 2020-10-27 | Hot air drainage pipeline structure of coal mill |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022428147.4U CN214052061U (en) | 2020-10-27 | 2020-10-27 | Hot air drainage pipeline structure of coal mill |
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| CN214052061U true CN214052061U (en) | 2021-08-27 |
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| CN202022428147.4U Active CN214052061U (en) | 2020-10-27 | 2020-10-27 | Hot air drainage pipeline structure of coal mill |
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| CN (1) | CN214052061U (en) |
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2020
- 2020-10-27 CN CN202022428147.4U patent/CN214052061U/en active Active
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