CN213300072U - Pulverized coal furnace - Google Patents
Pulverized coal furnace Download PDFInfo
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- CN213300072U CN213300072U CN202021841633.2U CN202021841633U CN213300072U CN 213300072 U CN213300072 U CN 213300072U CN 202021841633 U CN202021841633 U CN 202021841633U CN 213300072 U CN213300072 U CN 213300072U
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- 239000003245 coal Substances 0.000 title claims abstract description 47
- 230000000903 blocking effect Effects 0.000 claims description 9
- 239000003638 chemical reducing agent Substances 0.000 claims description 9
- 239000000843 powder Substances 0.000 claims description 8
- 238000007789 sealing Methods 0.000 claims description 3
- 238000007599 discharging Methods 0.000 claims 1
- MWUXSHHQAYIFBG-UHFFFAOYSA-N Nitric oxide Chemical compound O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 abstract description 12
- RHZUVFJBSILHOK-UHFFFAOYSA-N anthracen-1-ylmethanolate Chemical compound C1=CC=C2C=C3C(C[O-])=CC=CC3=CC2=C1 RHZUVFJBSILHOK-UHFFFAOYSA-N 0.000 abstract description 3
- 239000003830 anthracite Substances 0.000 abstract description 3
- 239000000779 smoke Substances 0.000 abstract description 2
- 238000002485 combustion reaction Methods 0.000 description 13
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 3
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 239000003546 flue gas Substances 0.000 description 3
- 239000001301 oxygen Substances 0.000 description 3
- 229910052760 oxygen Inorganic materials 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- 239000002802 bituminous coal Substances 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 239000002817 coal dust Substances 0.000 description 2
- 238000004939 coking Methods 0.000 description 2
- 239000010881 fly ash Substances 0.000 description 2
- 230000001706 oxygenating effect Effects 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 239000002893 slag Substances 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 238000005536 corrosion prevention Methods 0.000 description 1
- 238000010790 dilution Methods 0.000 description 1
- 239000012895 dilution Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
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Abstract
The utility model discloses a pulverized coal furnace, including furnace, furnace upper portion lateral wall is equipped with a plurality of first burner nozzles, a plurality of second burner nozzles, a plurality of third burner nozzles and a fourth burner nozzle that set up about being. By adopting the utility model, the nitrogen oxide at the outlet of the hearth is obviously reduced compared with the prior art, and the burning anthracite is 500mg/m in 450-3The smoke coal is 400-450mg/m3。
Description
Technical Field
The utility model belongs to the technical field of mechanical equipment, concretely relates to pulverized coal furnace.
Background
The existing coal powder furnace designs the coal type to be anthracite, and adopts a ball mill, an intermediate powder bin and a powder preparation system with hot air powder feeding. The burner of the boiler adopts a mature shutter horizontal rich-lean burner, so that the concentration of the pulverized coal is separated, the airflow of the pulverized coal on the fire side is concentrated, and the airflow of the pulverized coal on the back fire side is dilute. The horizontal thick and thin combustion is organized, the advantages that the burners are arranged at four corners in a tangential mode and are ignited at the adjacent corners of the fire side are fully exerted, the ignition and the stable combustion are facilitated, the oxidizing atmosphere of airflow can be improved by the thin pulverized coal airflow at the back fire side, and the coking is prevented or reduced. However, the burner has the disadvantages of single range of coal used, high quality coal, high cost and high initial nitrogen oxide emission of the boiler.
Disclosure of Invention
The utility model provides a pulverized coal furnace, through rationally setting up many kinds of coal combustor nozzles, can overcome the shortcoming such as the burning coal range is narrow, boiler initial nitrogen oxide discharge capacity height, the low-load surely fires the performance poor steadily.
The utility model discloses a realize through following technical scheme.
A pulverized coal furnace comprises a hearth and is characterized in that a plurality of first burner nozzles, a plurality of second burner nozzles, a plurality of third burner nozzles and a fourth burner nozzle which are vertically arranged are arranged on the side wall of the upper part of the hearth, and the fourth burner nozzle is arranged on the uppermost surface;
the first combustor nozzle includes: the inner pipe, the outer pipe that is sleeved outside the inner pipe, and the first wave-shaped blunt body, the first guide plate, the second guide plate and the baffle plate which are arranged in the inner pipe in sequence;
the second combustor nozzle includes: the first horizontal pipe section, the reducer pipe and the second horizontal pipe section are connected in sequence;
the third combustor nozzle includes: the double-layer pipe is provided with a first wave-shaped blunt body and a second wave-shaped blunt body, wherein one end of the first wave-shaped blunt body is inclined downwards;
the fourth combustor nozzle includes: the horizontal inner pipe, one end gap is fitted on the horizontal intermediate pipe outside one end of the horizontal inner pipe, one end gap is fitted on the horizontal outer pipe outside the horizontal intermediate pipe; the horizontal inner pipe and the horizontal middle pipe are connected with the angle adjusting assembly.
Furthermore, the upper pipe wall and the lower pipe wall of a horizontal middle pipe of the fourth burner nozzle are connected with a horizontal outer pipe through first pin shafts, the pipe wall of the horizontal inner pipe is connected with the pipe wall of the horizontal middle pipe through second pin shafts, and the outer pipe wall of the horizontal inner pipe is connected with the inner pipe wall of the horizontal middle pipe through an annular sealing plate; the angle adjusting assembly comprises a first assembly and a second assembly; the first adjusting assembly comprises a first adjusting rod and a first handle, one end of the first adjusting rod is connected with the horizontal inner pipe, and the other end of the first adjusting rod is hinged with the first handle arranged outside the horizontal outer pipe; the second adjusting assembly comprises a second adjusting rod and a second handle, one end of the second adjusting rod is connected with the horizontal middle pipe, and the other end of the second adjusting rod is hinged with the second handle arranged outside the horizontal outer pipe.
Furthermore, a vertical adjusting baffle is arranged in the other end pipe of the horizontal outer pipe and is connected with an adjusting device arranged outside the horizontal outer pipe.
Furthermore, the first burner nozzle is connected with an outlet of the air-coal mixer, the second burner nozzle and the fourth burner nozzle are connected with a hot air conveying pipe, and the third burner nozzle is connected with an outlet of the powder exhauster.
Further, the one end of the inner tube of first combustor nozzle is the exit end, and the other end is the entrance point, the exit end mouth of pipe of inner tube is the horn form mouth of pipe, all open two horizontal slot holes that set up about being on the body of the both sides of inner tube exit end.
Furthermore, the first wave-shaped bluff body is close to the outlet end of the inner tube, and two ends of the first wave-shaped bluff body are fixedly connected with the inner side wall of the inner tube.
Furthermore, the first guide plate comprises a horizontal plate and a downward inclined plate connected with one end of the horizontal plate, and two sides of the first guide plate are fixedly connected with the inner side wall of the inner pipe; the second guide plate is a rectangular plate with one upward inclined end, the upward inclined end of the rectangular plate faces the inlet end of the inner tube, and two sides of the second guide plate are fixedly connected with the inner side wall of the inner tube; the cross section of the blocking plate is a triangular plate, and the upper end of the blocking plate is fixedly connected with the inner upper wall of the inner tube.
Furthermore, horizontal long holes which are vertically arranged are formed in the pipe walls of two sides of one end of the first horizontal pipe section, the other end of the first horizontal pipe section is connected with one end of the reducer pipe, and the other end of the reducer pipe is connected with one end of the second horizontal pipe section.
Furthermore, the downward inclination angle of one end of the double-layer pipe is 3-6 degrees, and horizontal long holes are formed in pipe walls on two sides of one end of the double-layer pipe.
Further, furnace upper portion lateral wall is equipped with from bottom to top in proper order: the third burner nozzle, two sets of first and second burner nozzles are alternately distributed, and then the first, third, second, third and fourth burner nozzles are arranged.
The utility model has the advantages of:
1. the combustion is stable, the existing lean coal and the new bituminous coal (the average volatile matter is 21.7%) can be well adapted, and the adaptability to low-calorific-value coal is strong;
2. the low-load stable combustion capacity is higher than that before transformation, and oil injection operation is not needed when the load is 130-140 t/h;
3. the boiler burns lean coal or bituminous coal, and the full load (240t/h) capacity of the boiler is not influenced;
4. no serious coking phenomenon is found;
5. compared with the prior art, the nitrogen oxide at the outlet of the hearth is obviously reduced, and the burning anthracite is 500mg/m in 450-3The smoke coal is 400-450mg/m3。
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
Fig. 2 is a schematic structural diagram of a first burner nozzle according to the present invention.
FIG. 3 is a schematic view of a second burner nozzle according to the present invention.
Fig. 4 is a schematic structural view of a third burner nozzle according to the present invention.
Fig. 5 is a schematic structural view of a fourth burner nozzle according to the present invention.
Fig. 6 is a schematic structural diagram of the second adjusting assembly of the present invention.
Detailed Description
The present invention will be described in detail with reference to the accompanying drawings and specific embodiments.
As shown in fig. 1 to 5, a pulverized coal furnace comprises a hearth, wherein a plurality of first burner nozzles 1, a plurality of second burner nozzles 2, a plurality of third burner nozzles 3 and a fourth burner nozzle 4 are arranged on a side wall 28 at the upper part of the hearth in an up-and-down manner, wherein the fourth burner nozzle 4 is arranged at the uppermost part; the first burner nozzle 1 is connected with the outlet of the air-coal mixer, the second burner nozzle 2 and the fourth burner nozzle 4 are connected with a hot air delivery pipe through branch pipes, and the third burner nozzle 3 is connected with the outlet of the powder exhauster; the first burner nozzles 1, the second burner nozzles 2 and the third burner nozzles 3 are alternately distributed, and can also be arranged in the following sequence from bottom to top: a third burner nozzle, a first burner nozzle, a second burner nozzle, a first burner nozzle, a third burner nozzle, a second burner nozzle, a third burner nozzle, a fourth burner nozzle;
the first combustor nozzle 1 includes: the baffle comprises an inner pipe 5, an outer pipe 6 sleeved outside the inner pipe, and a horizontal first wave-shaped blunt body 7, a first guide plate 8, a second guide plate 9 and a blocking plate 10 which are sequentially arranged in the inner pipe; the cross sections of the inner pipe and the outer pipe are square pipes, one end of the inner pipe 5 is an outlet end, the other end of the inner pipe is an inlet end (used for being connected with an outlet of the wind-coal mixer), a pipe orifice of the outlet end of the inner pipe 5 is a horn-shaped pipe orifice, and two parallel horizontal long holes which are arranged up and down are formed in pipe bodies on two sides of the outlet end of the inner pipe 5; the position of the first wave-shaped blunt body 7 is close to the outlet end of the inner tube, and two ends of the first wave-shaped blunt body are fixedly connected with the inner side wall of the inner tube 5; the first guide plate 8 comprises a horizontal plate and a downward inclined plate connected with one end of the horizontal plate, and two sides of the first guide plate are fixedly connected with the inner side wall of the inner pipe; the second guide plate 9 is a rectangular plate with one end inclined upwards, the upward inclined end of the rectangular plate faces the inlet end of the inner tube, and two sides of the second guide plate are fixedly connected with the inner side wall of the inner tube; the cross section of the blocking plate 10 is a triangular plate, the upper end of the blocking plate is fixedly connected with the inner upper wall of the inner tube 5, the blocking plate is close to the inlet end of the inner tube, and the first guide plate 8 and the second guide plate 9 are arranged between the first wave-shaped blunt body 7 and the blocking plate 10; a hot air channel is formed between the inner pipe wall of the outer pipe 6 and the outer pipe wall of the inner pipe 5 and is used for introducing hot air;
the second combustor nozzle 2 includes: the pipe comprises a first horizontal pipe section 11, a reducer pipe 12 and a second horizontal pipe section 13 which are connected in sequence; the first horizontal pipe section 11 and the second horizontal pipe section 13 are both square pipes, two parallel horizontal long holes which are vertically arranged are formed in pipe walls on two sides of one end of the first horizontal pipe section 11, the other end of the first horizontal pipe section 11 is connected with one end of the reducer pipe 12, and the other end of the reducer pipe 12 is connected with one end of the second horizontal pipe section 13; one end of the first horizontal pipe section 11 is an air outlet end, and the other end of the second horizontal pipe section 13 is an air inlet end and is used for being connected with an outlet of a hot air conveying pipe;
the third combustor nozzle 3 includes: a double-layer pipe 14 with one end inclined downwards and a double-layer horizontal pipe 15 with one end connected with the other end of the double-layer pipe, wherein the double-layer pipe 14 is provided with a horizontal second wave-shaped blunt body 16; the double-layer pipe 14 and the double-layer horizontal pipe 15 are both double-layer square pipes with the cross sections; one end of the double-layer pipe 14 is inclined downwards by an angle of 3-6 degrees, and the pipe walls on two sides of one end of the double-layer pipe are both provided with horizontal long holes; one end of the double-layer pipe 14, which inclines downwards, is an air outlet end, and the other end of the double-layer horizontal pipe 15 is an air inlet end which is connected with an outlet of the powder exhauster for inward air supply; the second wave-shaped bluff body 16 has the same structure as the first wave-shaped bluff body 7 (both are known components), and both play a role in facilitating stable combustion of airflow;
the fourth burner nozzle 4 includes: a horizontal inner pipe 17, a horizontal middle pipe 18 with one end being sleeved outside one end of the horizontal inner pipe in a clearance mode, a horizontal outer pipe 19 with one end being sleeved outside the horizontal middle pipe in a clearance mode, and an angle adjusting assembly; one end of the horizontal inner pipe 17 is hemispherical in section, the other end of the horizontal inner pipe is square, and the horizontal middle pipe 18 and the horizontal outer pipe 19 are square pipes; the upper pipe wall and the lower pipe wall of the horizontal middle pipe 18 are both connected with the horizontal outer pipe 19 through a first pin shaft 20, the pipe wall of the horizontal inner pipe 17 is connected with the pipe wall of the horizontal middle pipe 18 through a second pin shaft 27, and the outer pipe wall of the horizontal inner pipe 17 is connected with the inner pipe wall of the horizontal middle pipe through an annular sealing plate 21; the angle adjusting assembly comprises a first adjusting assembly and a second adjusting assembly; the first adjusting assembly comprises a first adjusting rod 22 and a first handle 23, one end of the first adjusting rod is hinged with the horizontal inner tube 17, the other end of the first adjusting rod 22 is hinged with a first handle 23 arranged outside the horizontal outer tube, and one end of the first handle 23 connected with the first adjusting rod 22 is arranged inside the horizontal outer tube 19; the second adjusting assembly comprises a second adjusting rod 24 and a second handle 25, one end of the second adjusting rod 24 is hinged with the horizontal middle pipe 18, the other end of the second adjusting rod 24 is hinged with the second handle 25 arranged outside the horizontal outer pipe, and one end of the second handle 25 connected with the second adjusting rod 24 is arranged inside the horizontal outer pipe; a vertical square adjusting baffle is arranged in the other end pipe of the horizontal outer pipe and is connected with an adjusting device 26 which is arranged outside the horizontal outer pipe, and the adjusting device is specifically an electric actuator. The other end of the horizontal inner pipe 17 is an air outlet end, and the other end of the horizontal outer pipe 19 is an air inlet end and is used for being connected with an outlet of a hot air conveying pipe.
The separation of the coal dust concentration and the dilution of the coal dust is realized through the baffle plate 10, the first guide plate 8 and the second guide plate 9. The first wave-shaped bluff body 7 and the second wave-shaped bluff body 16 have the functions of forming a negative pressure area around the nozzle, strengthening the backflow of high-temperature flue gas around entrainment and absorption, and having positive and stable effects on advanced ignition and ignition of pulverized coal. The concentrated shade arrangement of the primary air and the wave-shaped bluff body can maximally suck the high-temperature flue gas to increase the heat transfer of the high-temperature flue gas to the pulverized coal, so that the ignition time of the primary air is ensured to be advanced, and compared with a common primary air form, the pulverized coal retention time is further increased.
Two layers of first burner nozzles 1 and a second burner nozzle 2 arranged in the middle form a functional area with high stable combustion and high precipitation of functional reducing substances in the area. When the two layers of first burner nozzles are concentrated in shade, the second burner nozzle can effectively control the ignition time and the ignition distance of the pulverized coal in the functional area and the relative combustion atmosphere in the area, and plays an important role in further reducing NOx and ensuring timely combustion of carbon.
The third burner nozzle 3 is arranged in the area of leading in the main burner, can reduce the amount of the secondary air in the area of the main burner, reduce the position of the third burner nozzle at the same time, has lengthened the burning time of pulverized coal in the stove in the tertiary air, help to reduce the content of fly ash combustible substance of the boiler, and reduce the influence of the tertiary air on boiler burning when the ball mill starts and stops.
The utility model is suitable for a coal fired volatile component scope Var is 10 ~ 25% industrial pulverized coal boiler. The nozzles of the multiple coal combustors are scientifically arranged, so that a longitudinal three-zone distribution state and a transverse two-zone distribution state are formed in a combustion area. The first burner nozzle and the second burner nozzle are recombined and distributed in the main burner area, and the first burner nozzle adopts the spatial rich-lean combustion technology to combine and distribute. The longitudinal excess air coefficient distribution is controlled, and the longitudinal excess air coefficient distribution is respectively an oxidation combustion area, a concentrated reduction area and a burnout area from bottom to top. By adjusting the tangential circle of the primary air and the secondary air in the furnace, wall-attached air is arranged near the nozzle of the second burner, three central areas and near-wall areas with different characteristics are formed on the section of the hearth, the central areas have higher pulverized coal concentration, higher temperature and relatively higher oxygen concentration distribution, and the near-wall areas (the space near the nozzle of the burner) have lower temperature, lower particle concentration and proper oxygen concentration. The adherence wind can ensure that enough oxygen exists on the wall surface, prevent slag bonding and high-temperature corrosion, and does not change the main jet flow direction. The fourth burner nozzle is arranged at the upper part of the main burner area, which accounts for about 30 percent of the total air volume and is a main means for reducing NOx in fuel type and thermal type. The tertiary air is introduced into the main burner area through the third burner nozzle, the amount of secondary air in the main burner area can be reduced, meanwhile, about 15% of pulverized coal in the tertiary air is sent into a hearth in advance (compared with the original high-position arrangement), and because the position is reduced, the combustion time of the pulverized coal in the tertiary air in the boiler is prolonged, and the reduction of the content of boiler fly ash combustible substances is facilitated.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention. It should be noted that other modifications and equivalents may be made by those skilled in the art in light of the teachings of the present disclosure to achieve the same purpose, and should be construed as within the scope of the present disclosure.
Claims (10)
1. A pulverized coal furnace comprises a hearth and is characterized in that a plurality of first burner nozzles, a plurality of second burner nozzles, a plurality of third burner nozzles and a fourth burner nozzle which are vertically arranged are arranged on the side wall of the upper part of the hearth, and the fourth burner nozzle is arranged on the uppermost surface;
the first combustor nozzle includes: the inner pipe, the outer pipe that is sleeved outside the inner pipe, and the first wave-shaped blunt body, the first guide plate, the second guide plate and the baffle plate which are arranged in the inner pipe in sequence;
the second combustor nozzle includes: the first horizontal pipe section, the reducer pipe and the second horizontal pipe section are connected in sequence;
the third combustor nozzle includes: the double-layer pipe is provided with a first wave-shaped blunt body and a second wave-shaped blunt body, wherein one end of the first wave-shaped blunt body is inclined downwards;
the fourth combustor nozzle includes: the horizontal inner pipe, one end gap is fitted on the horizontal intermediate pipe outside one end of the horizontal inner pipe, one end gap is fitted on the horizontal outer pipe outside the horizontal intermediate pipe; the horizontal inner pipe and the horizontal middle pipe are connected with the angle adjusting assembly.
2. The pulverized coal furnace as claimed in claim 1, wherein the upper and lower pipe walls of the horizontal intermediate pipe of the fourth burner nozzle are connected to the horizontal outer pipe by a first pin, the pipe wall of the horizontal inner pipe is connected to the pipe wall of the horizontal intermediate pipe by a second pin, and the outer pipe wall of the horizontal inner pipe is connected to the inner pipe wall of the horizontal intermediate pipe by an annular sealing plate; the angle adjusting assembly comprises a first assembly and a second assembly; the first assembly comprises a first adjusting rod and a first handle, one end of the first adjusting rod is connected with the horizontal inner pipe, and the other end of the first adjusting rod is hinged with the first handle arranged outside the horizontal outer pipe; the second assembly comprises a second adjusting rod and a second handle, one end of the second adjusting rod is connected with the horizontal middle pipe, and the other end of the second adjusting rod is hinged with the second handle arranged outside the horizontal outer pipe.
3. The pulverized coal furnace as claimed in any one of claims 1-2, wherein a vertical adjusting baffle is arranged in the other end pipe of the horizontal outer pipe, and the adjusting baffle is connected with an adjusting device arranged outside the horizontal outer pipe.
4. The pulverized coal furnace as claimed in any one of claims 1-2, wherein the first burner nozzle is connected with the outlet of the air-coal mixer, the second burner nozzle and the fourth burner nozzle are both connected with the hot air delivery pipe, and the third burner nozzle is connected with the outlet of the powder discharging machine.
5. The pulverized coal furnace as claimed in any one of claims 1-2, wherein the inner tube of the first burner nozzle has an outlet end at one end and an inlet end at the other end, the outlet end of the inner tube is a trumpet-shaped tube, and two horizontal long holes are formed in the tube body at the two sides of the outlet end of the inner tube.
6. The pulverized coal furnace as claimed in claim 5, wherein the first wave-shaped bluff body is located near the outlet end of the inner pipe, and both ends of the first wave-shaped bluff body are fixedly connected with the inner side wall of the inner pipe.
7. The pulverized coal furnace as claimed in claim 5, wherein the first guide plate comprises a horizontal plate and a tilted plate which is connected with one end of the horizontal plate and is tilted downwards, and two sides of the first guide plate are fixedly connected with the inner side wall of the inner pipe; the second guide plate is a rectangular plate with one upward inclined end, the upward inclined end of the rectangular plate faces the inlet end of the inner tube, and two sides of the second guide plate are fixedly connected with the inner side wall of the inner tube; the cross section of the blocking plate is a triangular plate, and the upper end of the blocking plate is fixedly connected with the inner upper wall of the inner tube.
8. The pulverized coal furnace as claimed in any one of claims 1 to 2, wherein the two side walls of one end of the first horizontal pipe section are provided with vertically arranged horizontal long holes, the other end of the first horizontal pipe section is connected with one end of a reducer pipe, and the other end of the reducer pipe is connected with one end of the second horizontal pipe section.
9. The pulverized coal furnace as claimed in any one of claims 1-2, wherein one end of the double-layer pipe is inclined downward at an angle of 3 ° to 6 °, and horizontal long holes are formed in both side walls of one end of the double-layer pipe.
10. The pulverized coal furnace as claimed in any one of claims 1 to 2, wherein the side wall of the upper part of the hearth is provided with: the third burner nozzle, two sets of first and second burner nozzles are alternately distributed, and then the first, third, second, third and fourth burner nozzles are arranged.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021841633.2U CN213300072U (en) | 2020-08-28 | 2020-08-28 | Pulverized coal furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021841633.2U CN213300072U (en) | 2020-08-28 | 2020-08-28 | Pulverized coal furnace |
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| CN213300072U true CN213300072U (en) | 2021-05-28 |
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| CN202021841633.2U Active CN213300072U (en) | 2020-08-28 | 2020-08-28 | Pulverized coal furnace |
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| CN (1) | CN213300072U (en) |
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