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CN-116608462-B - Coal motor group steady burning device

CN116608462BCN 116608462 BCN116608462 BCN 116608462BCN-116608462-B

Abstract

The invention discloses a coal motor group stable combustion device which comprises a combustor and a stable combustion device, wherein the stable combustion device is communicated with the combustor, the stable combustion device extends along a first direction and comprises a shell and a coal powder pipe assembly, the shell comprises a cavity, at least part of the coal powder pipe assembly is arranged in the cavity, the outer peripheral surface of the coal powder pipe assembly is in sealing connection with the shell, a first channel and a second channel are arranged in the coal powder pipe assembly at intervals, the first channel and the second channel are communicated with the cavity, and an outlet of the first channel is adjacent to an inlet end of the coal powder pipe assembly relative to an outlet of the second channel. Therefore, the stable combustion device of the coal motor unit has the advantages of good combustion stability, good environmental protection effect, low production cost and the like.

Inventors

  • LIU GANG
  • MIAO PENG
  • WANG SHIPU
  • WANG XIN
  • DONG ZHI
  • CHEN ZHE
  • ZHANG CHAO
  • TAN JING
  • ZHANG JING
  • ZHANG YUAN
  • XING WENCHAO
  • SHI LIANG
  • PAN HAO
  • CAI PENG
  • YU HAIPENG
  • GUO MENGMENG
  • WANG ZHIQIANG
  • LI XIAOJIAO
  • JI RENSHAN
  • WANG ZHIXING
  • JIA DONGLIANG
  • JIANG SIYUAN
  • ZHANG BIN
  • CUI YUHONG
  • CAO HAO

Assignees

  • 北京天地融创科技股份有限公司

Dates

Publication Date
20260505
Application Date
20230625

Claims (9)

  1. 1. A coal electric machine group flame stabilizing device, comprising: The burner comprises a burner and a stabilizer, wherein the stabilizer is communicated with the burner, the stabilizer extends along a first direction, the first direction comprises a first sub-direction and a second sub-direction opposite to the first sub-direction, and the direction from the inlet end of the stabilizer to the outlet end of the stabilizer is the first sub-direction; The stabilizer comprises: A housing, the housing comprising a cavity; the coal powder pipe assembly is internally provided with a first channel and a second channel, the first channel and the second channel are arranged in the coal powder pipe assembly at intervals, the first channel and the second channel are communicated with the cavity, and an outlet of the first channel is adjacent to an inlet end of the coal powder pipe assembly relative to an outlet of the second channel; the concentration piece is arranged in the pulverized coal pipe assembly, the concentration piece can divide primary air pulverized coal flow entering the pulverized coal pipe assembly into a first sub-flow and a second sub-flow, the pulverized coal concentration of the first sub-flow is smaller than that of the second sub-flow, the first channel is used for allowing the first sub-flow to pass through, and the second channel is used for allowing the second sub-flow to pass through; The secondary air pipe is communicated with the cavity; the burner includes: the feeding pipe assembly comprises a first feeding pipe and a second feeding pipe which are sequentially arranged in the first sub-direction at intervals, and a first flow path is arranged in the first feeding pipe; The combustion tube assembly is internally provided with a combustion chamber, the feeding tube assembly is connected with the combustion tube assembly, the combustion tube assembly extends along the first direction, the combustion tube assembly is internally provided with a second flow path and a third flow path, the first flow path, the second flow path and the third flow path are all communicated with the combustion chamber, the first flow path, the second flow path and the third flow path are arranged at intervals in the first direction, the second feeding tube is communicated with the second flow path and the third flow path, the outlet end of the combustion tube assembly is suitable for being connected with a combustion furnace, and the outlet end of the flame stabilizer penetrates through the side wall of the first feeding tube and stretches into the first flow path so as to be communicated with the combustion chamber.
  2. 2. The coal motor group steady burning apparatus of claim 1, wherein the pulverized coal pipe assembly comprises a first inlet, a first outlet and a second outlet, the first inlet, the first outlet and the second outlet are all arranged on the pulverized coal pipe assembly and are sequentially and alternately arranged along a first sub-direction, the first inlet and the first outlet are communicated through the first channel, the first inlet and the second outlet are communicated through the second channel, and the openings of the first outlet and the second outlet are all arranged towards the inlet end of the pulverized coal pipe assembly.
  3. 3. The coal electric power unit stable combustion device of claim 2, wherein the pulverized coal pipe assembly comprises: A first pipe, wherein the inlet end of the first pipe is provided with the first inlet; the second pipe, the second pipe with the enrichment spare is all established in the first intraductal, the enrichment spare with the second pipe is in first sub-direction is in proper order and the interval arrangement, the inner peripheral wall of first pipe with the outer peripheral wall of second pipe defines first subchannel, the inner peripheral wall of second pipe defines the second passageway.
  4. 4. The coal motor unit flame stabilizing device of claim 3, wherein the pulverized coal pipe assembly further comprises: A first return member which is fitted around the outer peripheral side of the second pipe and is connected to the outlet end of the second pipe, the outlet end of the first pipe extending between the first return member and the second pipe so that the inner peripheral wall of the first return member and the outer peripheral wall of the first pipe define a return passage communicating with the first sub-passage, and the opening of the return passage faces the inlet end of the first pipe to form the first outlet; the first backflow part and the second backflow part are sequentially and alternately arranged in the first sub-direction, and a part of the second backflow part is sleeved on the outer peripheral side of the first backflow part so as to form the second outlet.
  5. 5. The coal motor group steady burning apparatus of any one of claims 2-4, wherein the housing comprises a first section, a second section, a third section, and a fourth section connected in sequence in the first direction, the first section and the third section are each cylindrical, the cross-sectional area of the second section increases gradually along the first sub-direction, the cross-sectional area of the fourth section decreases gradually along the first sub-direction, the first outlet is provided in the second section, and the second outlet is provided in the third section.
  6. 6. A coal motor unit combustion stabilizing device as set forth in claim 3 wherein the thickening member is annular and the inner peripheral wall of the thickening member defines a concentration-regulating passage, the outer peripheral wall of the thickening member being in registry with the inner peripheral wall of the first tube, the thickening member including tapered sections and diverging sections disposed in sequence along the first sub-direction, the cross-sectional area of the tapered sections progressively increasing along the first sub-direction, the cross-sectional area of the diverging sections progressively decreasing along the first sub-direction so that the cross-sectional area of the concentration-regulating passage progressively decreases first and then progressively increases along the first sub-direction.
  7. 7. The coal electric power unit combustion stabilizing device of claim 1, wherein the combustion tube assembly includes an inner tube having a cavity therein to form the combustion chamber, the inner tube including a first combustion section and a second combustion section, the first combustion section and the second combustion section being sequentially disposed and in communication in the first sub-direction, an outlet end of the first combustion section extending into an inlet end of the second combustion section such that an outer peripheral wall of the first combustion section and an inner peripheral wall of the second combustion section define the second flow path.
  8. 8. The coal motor group steady burning device of claim 7, wherein the combustion tube assembly further comprises an outer tube, the outer tube is sleeved outside the inner tube, the inner peripheral wall of the outer tube is arranged at intervals with the outer peripheral wall of the inner tube, the outer tube comprises a rectifying section and a flow guiding section which are sequentially arranged along the first sub-direction, the inlet end of the rectifying section is in sealing connection with the inlet end of the first combustion section, and the inner peripheral wall of the flow guiding section and the outer peripheral wall of the second combustion section define a third flow path.
  9. 9. The coal electric power unit combustion stabilizing device of claim 8, wherein the first feed tube comprises: a first transition section connected to the first combustion section, the first transition section extending along the first direction and a cross-sectional area of the first transition section gradually decreasing along the first sub-direction; The inlet end of the first feeding section extends along a second direction, the second direction is orthogonal to the first direction, the outlet end of the first feeding section extends along the first direction, the first feeding section is connected with the first transition section, and the first feeding section is communicated with the first transition section to form the first flow path.

Description

Coal motor group steady burning device Technical Field The invention relates to the technical field of pulverized coal combustion, in particular to a stable combustion device of a coal motor group. Background If the stable combustion capability of the coal-fired power plant in the low-load and variable-load operation process is required to be improved, the stable combustion of the coal-fired power plant is usually realized by adding an ignition device or adding auxiliary fuel. In the related art, ignition is usually performed by using an ignition device, and a common ignition device uses diesel oil as fuel, so that a large amount of diesel oil is consumed during ignition, thereby increasing the operation cost, generating a large amount of sulfur-containing waste gas, and having poor environmental protection effect. Moreover, pulverized coal is often insufficiently combusted, and combustion efficiency is low. Disclosure of Invention The present invention aims to solve at least one of the technical problems in the related art to some extent. Therefore, the embodiment of the invention provides the coal motor group stable combustion device with good combustion stability and good environmental protection effect. The stable combustion device of the coal motor unit comprises: The burner comprises a burner and a stabilizer, wherein the stabilizer is communicated with the burner, the stabilizer extends along a first direction, the first direction comprises a first sub-direction and a second sub-direction opposite to the first sub-direction, and the direction from the inlet end of the stabilizer to the outlet end of the stabilizer is the first sub-direction; The stabilizer comprises: A housing, the housing comprising a cavity; the coal powder pipe assembly is internally provided with a first channel and a second channel, the first channel and the second channel are arranged in the coal powder pipe assembly at intervals, the first channel and the second channel are communicated with the cavity, and an outlet of the first channel is adjacent to an inlet end of the coal powder pipe assembly relative to an outlet of the second channel; the concentration piece is arranged in the pulverized coal pipe assembly, the concentration piece can divide primary air pulverized coal flow entering the pulverized coal pipe assembly into a first sub-flow and a second sub-flow, the pulverized coal concentration of the first sub-flow is smaller than that of the second sub-flow, the first channel is used for allowing the first sub-flow to pass through, and the second channel is used for allowing the second sub-flow to pass through; and the secondary air pipe is communicated with the cavity. Therefore, the stable combustion device of the coal motor unit has the advantages of good combustion stability, good environmental protection effect, low production cost and the like. In some embodiments, the burner comprises: the feeding pipe assembly comprises a first feeding pipe and a second feeding pipe which are sequentially arranged in the first sub-direction at intervals, and a first flow path is arranged in the first feeding pipe; The combustion tube assembly is internally provided with a combustion chamber, the feeding tube assembly is connected with the combustion tube assembly, the combustion tube assembly extends along a first direction, the combustion tube assembly is internally provided with a second flow path and a third flow path, the first flow path, the second flow path and the third flow path are all communicated with the combustion chamber, the first flow path, the second flow path and the third flow path are arranged at intervals in the first direction, the second feeding tube is communicated with the second flow path and the third flow path, an outlet end of the combustion tube assembly is suitable for being connected with a combustion furnace, and an outlet end of the steady burner penetrates through a side wall of the first feeding tube and stretches into the first flow path so as to be communicated with the combustion chamber. In some embodiments, the pulverized coal pipe assembly comprises a first inlet, a first outlet and a second outlet, the first inlet, the first outlet and the second outlet are all arranged on the pulverized coal pipe assembly and are sequentially and alternately arranged along a first sub-direction, the first inlet and the first outlet are communicated through the first channel, the first inlet and the second outlet are communicated through the second channel, and the openings of the first outlet and the second outlet are all arranged towards the inlet end of the pulverized coal pipe assembly. In some embodiments, the pulverized coal pipe assembly includes: A first pipe, wherein the inlet end of the first pipe is provided with the first inlet; the second pipe, the second pipe with the enrichment spare is all established in the first intraductal, the enrichment spare with the second pipe is in first sub-di