CN211260776U - Low-load stable combustion equipment of tangential firing boiler of thermal power plant - Google Patents
Low-load stable combustion equipment of tangential firing boiler of thermal power plant Download PDFInfo
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- CN211260776U CN211260776U CN201922391877.9U CN201922391877U CN211260776U CN 211260776 U CN211260776 U CN 211260776U CN 201922391877 U CN201922391877 U CN 201922391877U CN 211260776 U CN211260776 U CN 211260776U
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Abstract
A thermal power plant tangential firing boiler low-load stable-firing combustion device. The coal powder pipeline is provided with a coal powder dilute phase outlet, a coal powder concentrated phase outlet is arranged in the coal powder pipeline and penetrates through the coal powder pipeline, the coal powder pipeline is provided with an upper left hole, an upper right hole, a lower left hole and a lower right hole, the coal powder pipeline is connected with a sealing box, a left coal powder adjusting ring and a right coal powder adjusting ring are arranged in the coal powder pipeline, the left coal powder adjusting ring is connected with a left through pipe, the right coal powder adjusting ring is connected with a right through pipe, the left through pipe and the right through pipe are both connected with the sealing box, the left through pipe is connected with the coal powder adjusting ring to adjust a left pull rod, the coal powder adjusting ring adjusts the left pull rod to penetrate through the sealing box, the right through pipe is connected with the coal powder adjusting ring to adjust a right pull rod, the coal powder adjusting ring adjusts the right pull rod to penetrate through the sealing box, the. The utility model is used for thermal power generating unit tangential firing boiler of low-load operation.
Description
The technical field is as follows:
the utility model relates to a tangential firing boiler low-load combustion stabilizing equipment of a thermal power plant.
Background art:
at present, with the increase of the capacity of a power grid and the change of a power utilization structure, the appearance and the development of novel clean energy sources such as wind energy, solar energy, hydroelectric energy, nuclear power and the like, the peak-to-valley load difference of the power grid is gradually increased, and the demand on a peak-shaving power supply is also gradually increased. The large-capacity unit has insufficient capacity of deep peak regulation and low-load stable combustion in each large power grid in China.
The invention content is as follows:
the utility model aims at providing a guarantee thermal power plant tangential firing boiler low-load and surely fire combustion apparatus that boiler efficiency improves.
The above purpose is realized by the following technical scheme:
a low-load stable combustion device of a tangential firing boiler in a thermal power plant comprises a pulverized coal pipeline, wherein the pulverized coal pipeline is provided with a pulverized coal dilute phase outlet, a pulverized coal concentrated phase outlet is arranged in the pulverized coal pipeline and penetrates through the pulverized coal pipeline, the pulverized coal pipeline is provided with a left upper hole, a right upper hole, a left lower hole and a right lower hole, the pulverized coal pipeline is connected with a seal box, a left pulverized coal adjusting ring and a right pulverized coal adjusting ring are arranged in the pulverized coal pipeline, the left pulverized coal adjusting ring is connected with a left through pipe, the right pulverized coal adjusting ring is connected with a right through pipe, the left through pipe and the right through pipe are both connected with the seal box, the left through pipe is connected with a pulverized coal adjusting ring adjusting left pull rod, the pulverized coal adjusting ring adjusting left pull rod penetrates through the seal box, the right through pipe is connected with a pulverized coal adjusting ring adjusting right pull rod, the pulverized coal adjusting ring adjusts the right pull rod to penetrate through the sealing box, the left through pipe penetrates through the upper left hole and the lower left hole, and the right through pipe penetrates through the upper right hole and the lower right hole.
The tangential firing boiler low-load stable-firing combustion equipment of the thermal power plant is characterized in that a pulverized coal pipeline is arranged in a burner group, the burner group is arranged in a main combustion area, a first layer primary air burner and a second layer primary air burner or a second layer primary air burner and a third layer primary air burner are arranged at the bottom of the main combustion area, and the primary air burners are connected with a fuel grading pulverized coal burner and other primary air burners.
The tangential firing boiler low-load stable-firing combustion equipment in the thermal power plant is characterized in that the first layer and the second layer of primary air burners or the second layer and the third layer of primary air burners are two layers of burners, and the burner group is arranged in four corners and is set in a direct-current tangential firing mode.
Has the advantages that:
1. the utility model discloses a to thermal power factory tangent circle burning boiler pulverized coal combustion apparatus optimization transformation satisfy the ignition stable, the burning is stable and the unit low-load operation is stable.
2. The utility model discloses guaranteeing that boiler owner vapour temperature does not reduce, exhaust gas temperature does not reduce, and flying dust, big sediment carbonaceous content do not increase, slow down the slagging scorification in the stove, slow down under the prerequisite of high temperature corrosion, carry out the underload steady operation, realized degree of depth peak regulation, the flexibility operation.
3. The utility model discloses guaranteed boiler unit long-term safety and stability under the low-load condition and moved.
Description of the drawings:
fig. 1 is a schematic structural diagram of the product.
Fig. 2 is an assembled view of the product.
The specific implementation mode is as follows:
the technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings of the present invention.
Example 1:
a low-load stable combustion device of a tangential firing boiler in a thermal power plant comprises a pulverized coal pipeline 1, wherein the pulverized coal pipeline is provided with a pulverized coal dilute phase outlet 2, a pulverized coal concentrated phase outlet 3 is arranged in the pulverized coal pipeline and penetrates through the pulverized coal pipeline, the pulverized coal pipeline is provided with an upper left hole 4, an upper right hole 5, a lower left hole 6 and a lower right hole 7, the pulverized coal pipeline is connected with a sealing box 8, a left pulverized coal adjusting ring 9 and a right pulverized coal adjusting ring 10 are arranged in the pulverized coal pipeline, the left pulverized coal adjusting ring is connected with a left through pipe 11, the right pulverized coal adjusting ring is connected with a right through pipe 12, the left through pipe and the right through pipe are both connected with the sealing box, the left through pipe is connected with a pulverized coal adjusting left pull rod 13, the pulverized coal adjusting ring passes through the sealing box, the right through pipe is connected with a pulverized coal adjusting right pull rod 14, the pulverized coal adjusting ring adjusts the right pull rod to penetrate through the sealing box, the left through pipe penetrates through the upper left hole and the lower left hole, and the right through pipe penetrates through the upper right hole and the lower right hole.
The pulverized coal burner is characterized in that the pulverized coal pipeline is arranged in a burner group 15, the burner group is provided with a main combustion area 16, the bottom of the main combustion area is provided with a first layer primary air burner and a second layer primary air burner or a second layer primary air burner and a third layer primary air burner 17, and the primary air burners are connected with a fuel grading pulverized coal burner 18 and other primary air burners.
The first layer and the second layer of primary air burners or the second layer and the third layer of primary air burners are two layers of burners 19, and the burners are arranged in four corners and are set in a direct-current tangential circle combustion mode.
Example 2:
the low-load stable combustion device of the tangential firing boiler in the thermal power plant in embodiment 1 includes a plurality of burner groups, each burner group includes a fuel classification pulverized coal burner as a bottom first layer and a second layer or a second layer and a third layer of primary air burners in a main combustion area and a plurality of other primary air burners arranged in the main combustion area, the bottom first layer and the second layer or the second layer and the third layer of pulverized coal burners are two-layer burners, and the design of pure-dense and pure-dilute pulverized coal burners is performed. The combustor group is four combustor groups which are arranged at four corners and configured in a direct-current tangential circle combustion mode.
The pulverized coal pipeline at the inlet of the fuel staged burner is provided with a pulverized coal distribution pipeline, pulverized coal fuel entering the fuel staged burner is divided into a thick phase and a thin phase and is subjected to layered combustion, and a double-layer bluff body is arranged at a nozzle of the two-layer fuel staged burner; the pulverized coal distributing pipeline is internally provided with an adjustable ring type pulverized coal distributor, so that pulverized coal fuel entering the pulverized coal burner is changed into two streams of thick and thin pulverized coal air flows, and the fuel staged burners are arranged in an in-phase convergence mode, namely adjacent nozzles of a plurality of fuel staged burners are arranged in the same thick phase or the same thin phase. The back fire side of the fuel staged burner is provided with an independent anti-coking air nozzle.
The flexibility operation ability of the thermal power unit is improved, the way is saved for clean energy, under the premise that the stable operation of a power grid is guaranteed, the thermal power unit is required to be capable of stably operating under the condition that the rated load of the thermal power unit is not more than 25%, the stability flexibility of operation of the power plant unit is improved, deep peak regulation (low-load operation) is realized, the thermal power unit is started and stopped quickly, the load climbing ability of the thermal power unit is improved, thermoelectric decoupling can be realized for the thermal power unit, and the thermal power unit.
Of course, the above description is not intended to limit the present invention, and the present invention is not limited to the above examples, and the changes, modifications, additions or replacements made by those skilled in the art within the scope of the present invention also belong to the protection scope of the present invention.
Claims (3)
1. A low-load stable combustion device of a tangential firing boiler in a thermal power plant comprises a pulverized coal pipeline and is characterized in that the pulverized coal pipeline is provided with a pulverized coal dilute phase outlet, a pulverized coal concentrated phase outlet is arranged in the pulverized coal pipeline and penetrates through the pulverized coal pipeline, the pulverized coal pipeline is provided with a left upper hole, a right upper hole, a left lower hole and a right lower hole, the pulverized coal pipeline is connected with a seal box, a left pulverized coal adjusting ring and a right pulverized coal adjusting ring are arranged in the pulverized coal pipeline, the left pulverized coal adjusting ring is connected with a left through pipe, the right pulverized coal adjusting ring is connected with a right through pipe, the left through pipe and the right through pipe are both connected with the seal box, the left through pipe is connected with a pulverized coal adjusting ring to adjust a left pull rod, the pulverized coal adjusting ring adjusts the left pull rod to penetrate through the seal box, the right through pipe is connected with a pulverized coal adjusting ring to adjust the right pull rod, the pulverized coal adjusting ring adjusts the right pull rod to penetrate through the sealing box, the left through pipe penetrates through the upper left hole and the lower left hole, and the right through pipe penetrates through the upper right hole and the lower right hole.
2. The tangential firing boiler low-load stable combustion device of the thermal power plant as claimed in claim 1, wherein the pulverized coal pipeline is installed in a burner group, the burner group is provided with a main combustion area, the bottom of the main combustion area is provided with a first layer and a second layer of primary air burners or a second layer and a third layer of primary air burners, and the primary air burners are connected with the fuel grading pulverized coal burners and the other primary air burners.
3. The thermal power plant tangential firing boiler low-load stable-firing combustion device as claimed in claim 2, wherein the first layer and the second layer of primary air burners or the second layer and the third layer of primary air burners at the bottom are two-layer burners, and the burner group is arranged in a four-corner arrangement and a direct-current tangential firing manner.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922391877.9U CN211260776U (en) | 2019-12-27 | 2019-12-27 | Low-load stable combustion equipment of tangential firing boiler of thermal power plant |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922391877.9U CN211260776U (en) | 2019-12-27 | 2019-12-27 | Low-load stable combustion equipment of tangential firing boiler of thermal power plant |
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| Publication Number | Publication Date |
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| CN211260776U true CN211260776U (en) | 2020-08-14 |
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| CN201922391877.9U Active CN211260776U (en) | 2019-12-27 | 2019-12-27 | Low-load stable combustion equipment of tangential firing boiler of thermal power plant |
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| CN (1) | CN211260776U (en) |
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