CN204268500U - Coal pulverizer outlet rapid closing device and mill coal pulverizer system - Google Patents
Coal pulverizer outlet rapid closing device and mill coal pulverizer system Download PDFInfo
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- CN204268500U CN204268500U CN201420734154.9U CN201420734154U CN204268500U CN 204268500 U CN204268500 U CN 204268500U CN 201420734154 U CN201420734154 U CN 201420734154U CN 204268500 U CN204268500 U CN 204268500U
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- 239000003245 coal Substances 0.000 title claims abstract description 234
- 238000007789 sealing Methods 0.000 claims abstract description 136
- 230000007246 mechanism Effects 0.000 claims abstract description 37
- 230000005540 biological transmission Effects 0.000 claims abstract description 24
- 238000012856 packing Methods 0.000 claims abstract description 19
- 230000008676 import Effects 0.000 claims abstract description 12
- 238000002360 preparation method Methods 0.000 claims description 16
- 239000002184 metal Substances 0.000 claims description 6
- 239000000843 powder Substances 0.000 description 51
- 239000000203 mixture Substances 0.000 description 31
- 230000006870 function Effects 0.000 description 10
- 238000012360 testing method Methods 0.000 description 9
- 230000000903 blocking effect Effects 0.000 description 7
- 239000002817 coal dust Substances 0.000 description 7
- 238000009434 installation Methods 0.000 description 7
- 230000009711 regulatory function Effects 0.000 description 7
- 230000009471 action Effects 0.000 description 6
- 230000001105 regulatory effect Effects 0.000 description 5
- 238000005070 sampling Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 238000012423 maintenance Methods 0.000 description 4
- 230000008439 repair process Effects 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 3
- 238000002485 combustion reaction Methods 0.000 description 3
- 239000000446 fuel Substances 0.000 description 3
- 230000001737 promoting effect Effects 0.000 description 3
- 239000000956 alloy Substances 0.000 description 2
- 229910045601 alloy Inorganic materials 0.000 description 2
- 230000003750 conditioning effect Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000010304 firing Methods 0.000 description 2
- 238000003780 insertion Methods 0.000 description 2
- 230000037431 insertion Effects 0.000 description 2
- 230000008859 change Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000008570 general process Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000010298 pulverizing process Methods 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
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Abstract
A kind of coal pulverizer outlet rapid closing device and mill coal pulverizer system, this coal pulverizer outlet rapid closing device comprises: rectangle sealing box body, is welded between two sections of pulverized coal feed pipes by two bottom surfaces; Two the first sealing plates, are arranged on the relative side of two of rectangle sealing box body; Baffle mechanism, is made up of multiple baffle plate and multiple rotating shaft, and multiple rotating shaft two ends are parallel to be respectively fixed on two other relative side of rectangle sealing box body, and the first sealing plate and rotating shaft are in same plane; Along rotor shaft direction, the upper bottom surface of each baffle plate with the opposite side of bottom surface, there is the breach of a L shape respectively; Transmission mechanism, is connected respectively with multiple rotating shaft; Drive unit, connection for transmission mechanism; Ring packing airduct, is enclosed within rectangle sealing box body lateral surface, and the lateral surface of ring packing airduct is provided with sealing air access port, and the medial surface of ring packing airduct is provided with multiple sealing air import, and sealing air is introduced in rectangle sealing box body by sealing air import.
Description
Technical field
The utility model is about the pulverized coal preparation system technology in electric boiler, particularly about a kind of coal pulverizer outlet rapid closing device and mill coal pulverizer system.
Background technology
In pressurized direct pulverizing coal system station boiler, coal pulverizer outlet is connected by the pulverized coal feed pipe of some with between burner, four duff pipes joined by general Process In A Tangential Firing separate unit coal pulverizer, and 4-6 root duff pipe joined by Opposite Firing Boiler separate unit coal pulverizer.According to air motion direction on pulverized coal feed pipe, generally install coal pulverizer outlet rapid closing device successively, drag regulator (shrinkage cavity), coal-powder sampling device, wind speed measuring device etc.
Coal pulverizer outlet rapid closing device adopts pneumatic actuator to control, and baffle plate is insertion plate door, can close rapidly and fuel shutoff under coal pulverizer trip accident operating mode, when coal pulverizer is normally stopped transport, also can close outlet portal, for closed coal pulverizer, cut off wind powder transfer passage.
Because coal pulverizer exports the variant of each pulverized coal feed pipe length and trend, there is larger difference in wind powder mixture therein flow resistance, usually on pulverized coal feed pipe, the resistance pieces such as throttling arrangement are installed, to regulate the flow resistance of the wind powder air-flow on each pulverized coal feed pipe, make the wind speed, pulverized-coal concentration etc. at the burner nozzle place corresponding with same coal pulverizer even.
Existing station boiler coal pulverizer pulverized coal feed pipe is equiped with outlet portal and drag regulator, but substantially all adopt the mode be provided separately, outlet portal is insertion plate door (in Fig. 1 label 1), the general opening and closing all adopting pneumatic control door, for contacting between closed coal pulverizer outlet pulverized coal feed pipe and hearth combustor; Resistance throttling arrangement (in Fig. 1 label 2) adjustment is based on manual adjustable apparatus, and the shrinkage cavity of minority boiler installing fixation type throttle, by pre-set throttle resistance, regulates the wind powder mixture speed after this device.Outlet portal and throttling arrangement are installed separately on pulverized coal preparation system arranges signal as shown in Figure 1.In Fig. 1,1 is outlet portal, and 2 is drag regulator, and 3 is wind speed or coal powder density testing arrangement, and 4 is coal pulverizer inlet hot blast controllable register, and 5 is coal pulverizer inlet cold wind controllable register, and 6 is the total air door of coal pulverizer inlet, and 7 is coal pulverizer inlet apparatus for measuring air quantity.
Coal pulverizer is exported to the pulverized coal feed pipe between burner, by the limitation of pipe arrangement and duct length, outlet portal and drag regulator installation site not ideal enough, particularly orlop coal pulverizer absolute altitude is lower, export the pulverized coal channel that is connected apart from short, and pulverized coal feed pipe elbow is many with coal pulverizer, adopt mode arranged apart, installation site closely, affects the uniformity of breeze airflow flowing in pulverized coal feed pipe, brings comparatively big error to coal-powder sampling and measuring wind speed.In addition, adopt outlet portal and drag regulator mode arranged apart, add purchase cost and the repair and maintenance workload of equipment.
Utility model content
The utility model provides a kind of coal pulverizer outlet rapid closing device and mill coal pulverizer system, to solve that pulverized coal feed pipe is too short and installation site that is that bring breeze airflow that is limited and that cause thus is uneven, the inaccurate problem of field test data, and reduce costs.
To achieve these goals, the utility model embodiment provides a kind of coal pulverizer outlet rapid closing device, and described coal pulverizer outlet rapid closing device comprises:
Rectangle sealing box body, described rectangle sealing box body is welded between two sections of pulverized coal feed pipes by two bottom surfaces;
Two the first sealing plates, are arranged on the relative side of two of described rectangle sealing box body;
Baffle mechanism, by multiple baffle plate and drive multiple rotating shafts of flapper to form, multiple rotating shaft two ends are respectively on parallel two other relative side being fixed on described rectangle sealing box body, and described first sealing plate and described rotating shaft are in same plane; Along rotor shaft direction, the upper bottom surface of each baffle plate while there is the breach of a L shape respectively with the opposite side of bottom surface, make when the shutters are closed, the breach between adjacent screen cooperatively interacts, and the breach of one, outermost baffle plate and described first sealing plate cooperatively interact;
Transmission mechanism, is connected respectively with multiple rotating shaft;
Drive unit, connects described transmission mechanism, for driving described transmission mechanism;
Ring packing airduct, be enclosed within described rectangle sealing box body lateral surface, the lateral surface of described ring packing airduct is provided with sealing air access port, and the medial surface of described ring packing airduct is provided with multiple sealing air import, and sealing air is introduced in described rectangle sealing box body by described sealing air import.
In one embodiment, described coal pulverizer outlet rapid closing device also comprises:
Multipair second sealing plate, be arranged on the relative side of two of fixing described rotating shaft, and with multiple described rotating shaft in same plane, often pair of second sealing plate divides the both sides standing in a rotating shaft wherein one end, make when the shutters are closed, often pair of second sealing plate coordinates with the breach on baffle plate both sides respectively.
In one embodiment, described drive unit is pneumatic or Vidacare corp.
In one embodiment, the number of described baffle mechanism is 5.
In one embodiment, described rectangle sealing box body is metal case.
To achieve these goals, the utility model embodiment provides a kind of mill coal pulverizer system, described pulverized coal preparation system comprises: coal pulverizer, be connected to many pulverized coal channels of described coal pulverizer, be arranged on the wind speed measuring device on pulverized coal channel described in every bar and be arranged on the coal pulverizer outlet rapid closing device as claimed in claim 1 on pulverized coal channel described in every bar.
In one embodiment, described coal pulverizer outlet rapid closing device also comprises:
Multipair second sealing plate, be arranged on the relative side of two of fixing described rotating shaft, and with multiple described rotating shaft in same plane, often pair of second sealing plate divides the both sides standing in a rotating shaft wherein one end, make when the shutters are closed, often pair of second sealing plate coordinates with the breach on baffle plate both sides respectively.
In one embodiment, described drive unit is pneumatic or Vidacare corp.
In one embodiment, the number of described baffle mechanism is 5.
In one embodiment, described rectangle sealing box body is metal case.
The beneficial effect of the utility model embodiment is:
By traditional coal pulverizer outlet portal and drag regulator " two-in-one ", can meet and close rapidly and regulate pulverized coal channel resistance, reduce the equipment that pulverized coal feed pipe is installed, alleviate repair and maintenance workload;
After pulverized coal preparation system adopts coal pulverizer of the present utility model to export rapid closing device, pulverized coal feed pipe reduces by one group of installing component, installing on pulverized coal feed pipe for wind speed measuring device provides the position better, more meeting code requirement to create conditions, and then effectively solve most power plant pulverized coal preparation system pulverized coal channel is too short and installing space not enough and bring wind powder mixture poor fluidity and the problem such as wind powder air-flow is uneven, better meet on-the-spot test requirement.
New device adopts pneumatic control mode, have coal pulverizer outlet rapid closing device and resistance regulatory function concurrently, and energy remote operation, pulverized coal feed pipe resistance random groups operation state is regulated and becomes possibility, improve the control flexibility of drag regulator, for dynamically accurate control of combustion process each angle coal dust speed, concentration etc. creates conditions;
Adopt multiple-blade baffle forms, each blade synchronization adjustment, traditional two-piece type shrinkage cavity (shown in Fig. 1) resistance is avoided to regulate linear, not uneven problem, and then to improve in pulverized coal channel breeze airflow by drag regulator (shrinkage cavity) flow uniformity afterwards, be conducive to promoting coal powder density, the representativeness of breeze airflow sampling and accuracy, improve the accuracy of measuring wind speed;
Adopt cold First air or enchashment to have sealing air as the sealing air of this device, access annular sealing air pipe, effectively solve traditional shrinkage cavity accumulated powder blockage problem, lifting device reliability; Close the slow or close problem that is not closed completely after avoiding traditional coal pulverizer to export rapid closing device blocking simultaneously.
Accompanying drawing explanation
In order to be illustrated more clearly in the utility model embodiment or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is only embodiments more of the present utility model, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
Fig. 1 is existing mill coal pulverizer system structural representation;
Fig. 2 is the top view of the coal pulverizer outlet rapid closing device of the utility model embodiment;
Fig. 3 is the coal pulverizer outlet rapid closing device side view of the utility model embodiment;
Fig. 4 is the rectangle sealing box body of the utility model embodiment and the connection diagram of pulverized coal feed pipe;
Fig. 5 is the enlarged drawing of baffle plate and the first sealing plate in Fig. 3 of the utility model embodiment;
Fig. 6 is the structural representation of multipair second sealing plate 20 of the utility model embodiment;
Fig. 7 and Fig. 8 is the view of the second sealing plate 20 of the utility model embodiment;
Fig. 9 is the mill coal pulverizer system structural representation of the utility model embodiment.
Detailed description of the invention
Below in conjunction with the accompanying drawing in the utility model embodiment, be clearly and completely described the technical scheme in the utility model embodiment, obviously, described embodiment is only the utility model part embodiment, instead of whole embodiments.Based on the embodiment in the utility model, those of ordinary skill in the art are not making the every other embodiment obtained under creative work prerequisite, all belong to the scope of the utility model protection.
Shown in composition graphs 2 and Fig. 3, the utility model provides a kind of coal pulverizer to export rapid closing device, and described coal pulverizer outlet rapid closing device comprises: rectangle sealing box body 9, two the first sealing plates 3, baffle mechanism, transmission mechanism 6, drive unit 7 and ring packing airduct.
As shown in Figure 4, rectangle sealing box body 9, is welded between two section of 10 pulverized coal feed pipe 11 by two bottom surfaces.Two the first sealing plates 3, it is inner that baffle mechanism and transmission mechanism 6 are all arranged on rectangle sealing box body 9, and it is outside that drive unit 7 is arranged on rectangle sealing box body 9, not shown in Fig. 4.
As shown in Figures 2 and 3, two the first sealing plates 3 are separately positioned on the relative side 12,13 of two of rectangle sealing box body 9.
Baffle mechanism is by multiple baffle plate 1 and drive multiple rotating shafts 2 of flapper to form, multiple rotating shaft 2 two ends are parallel to be respectively fixed on two other relative side 14,15 of rectangle sealing box body 9, and two the first sealing plates 3 and rotating shaft 2 are in same plane.As depicted in figs. 3 and 5, along rotor shaft direction, one side 16 and the opposite side 17 of bottom surface of the upper bottom surface of each baffle plate 1 have the breach (or being called groove) 18 of a L shape respectively, make when baffle plate 1 closes, the breach between adjacent screen can cooperatively interact and the breach of one, outermost baffle plate and described first sealing plate cooperatively interact.When baffle plate 1 closes, between baffle plate, correlation is as shown in Figure 5, after adjacent screen fits together, and after outermost two baffle plates and two the first sealing plates 3 fit, fill up the breach of L shape, serve good sealing function, can ensure that can effectively block air-flow after blade damper closes passes through, and realizes reliably blocking.
Transmission mechanism 6 is connected respectively with multiple rotating shaft 2.Drive unit 7 connection for transmission mechanism 6, with drive transmission device action, drives multiple rotating shaft 2 to rotate respectively, and the final baffle plate 1 that drives is around axis of rotation, and baffle plate 1 is blade damper in one embodiment, and the utility model is not as limit.
As shown in Figure 2, ring packing wind pipeline 4 is enclosed within the lateral surface of rectangle sealing box body 9, the lateral surface of ring packing airduct 9 is provided with sealing air access port 8, the medial surface of ring packing airduct is provided with multiple sealing air import 19, and sealing air is introduced in rectangle sealing box body 9 by sealing air import 19.Sealing air as shown in Figure 2 sealing air access port 8 enters the ring packing wind pipeline 4 of coal pulverizer outlet rapid closing device.Sealing air pressure is about 2 times of wind powder mixture pressure in pulverized coal feed pipe, can by the inside being entered rectangle sealing box body 9 by multiple sealing air import 19 by multiple directions, and enter into pulverized coal feed pipe by the gap between blade damper and pulverized coal feed pipe, play and block the effect that coal dust enters coal pulverizer outlet rapid closing device inside, avoid coal dust to accumulate blocking blades baffle plate or transmission mechanism, affect the flexibility that mechanism regulates.
As the above analysis, when wind powder mixture flows through coal pulverizer of the present utility model outlet rapid closing device, this coal pulverizer outlet rapid closing device can produce different SRs under different opening position, and then affects flowing velocity and the coal powder density of wind powder mixture.The wind speed measuring device (also can be coal concentration measuring device) 2 in wind powder mixture and downstream with the use of, by the aperture regulating coal pulverizer to export rapid closing device inner vanes baffle plate dynamically, the wind speed (being recorded by wind speed measuring device) that device 2 is monitored or coal powder density (being recorded by coal concentration measuring device) unanimously, realize the object of dynamic adjustments thus.
When " when coal pulverizer outlet rapid closing device receives an out code, drive unit 7 controls blade damper and closes to rapidly minimum aperture, realizes closing and completely cutting off pulverized coal feed pipe, realizes the quick closedown function of coal pulverizer outlet damper thus.
Coal pulverizer of the present utility model is utilized to export rapid closing device, make the wind powder mixture out being entered pulverized coal feed pipe by coal pulverizer, only need the coal pulverizer outlet rapid closing device through with resistance regulatory function, the dynamic adjustments of flow velocity in each pulverized coal feed pipe can be realized simultaneously and close isolated function, and ensure that each angle wind powder mixture wind speed is consistent, make wind powder mixture flow field in pulverized coal feed pipe evenly, thus provide better for the installation on pulverized coal feed pipe of wind speed measuring device or coal concentration measuring device, the position more meeting code requirement creates conditions, the wind powder mixture poor fluidity that the too short and installing space of effective solution most power plant pulverized coal preparation system pulverized coal channel is not enough and bring and the problem such as wind powder air-flow is uneven, better meet on-the-spot test requirement.
Above-mentioned coal pulverizer outlet rapid closing device only on rectangle sealing box body 9, two of non-fixed rotating shaft 2 relative sides (being parallel to two sides of rotating shaft) 12,13 has installed two the first sealing plates 3, not fixing seal baffle plate on two of fixed rotating shaft 2 relative sides 14,15.In order to make better tightness, in one embodiment, as shown in Figure 6, two of fixed rotating shaft 2 relative sides 14,15 are provided with multipair second sealing plate 20, multipair second sealing plate 20 and multiple rotating shaft 2 are in same plane, the two panels baffle plate of often pair of second sealing plate divides the both sides standing in a rotating shaft wherein one end, and make when the shutters are closed, often pair of second sealing plate coordinates with the breach on corresponding baffle plate both sides respectively.Below in conjunction with Fig. 7 and Fig. 8, for one of them rotating shaft 2 on side 14, illustrate and how to realize sealing by often pair of second sealing plate 20.As shown in Figure 7, rotating shaft 2 fixing on side 14 is rotated, and drive baffle plate 1 to rotate clockwise, just can obtain the closure state shown in Fig. 8, this has filled up the L v notch v 18 of baffle plate 1 respectively to two pieces of baffle plates 21,22 of the second sealing plate 20, achieves better sealing.
Above-mentioned drive unit 7 can be pneumatic or Vidacare corp, such as, be electric motor or pneumatic motor.The transmission mechanism 6 of coal pulverizer outlet rapid closing device is driven by pneumatic or Vidacare corp, can quick closedown in 3s, meets the requirement of accident conditions or normal stoppage in transit operating mode fast shut-off fuel.
In one embodiment, the number of baffle mechanism is 5, and the utility model is not as limit.Blade damper can be made up of wear-resistant alloy, totally 5 are enclosed in rectangle sealing box body (metal shell) 9, and are installed in pulverized coal channel, as shown in Figure 3, blade is opening and closing simultaneously under the drive of transmission device 7, plays closing baffle plate or even throttling action.The Multi-vane type baffle arrangement of coal pulverizer outlet rapid closing device, blade action is more flexible, and resistance regulates evenly, reaches even regulation flow velocity, the conforming effect in flow field after guarantee throttling.In addition, the blade damper of coal pulverizer outlet rapid closing device can realize pneumatic control adjustment operation within the scope of completely open and close, and making mill coal pulverizer system carry out pulverized coal channel SR dynamic conditioning at normal operation period becomes possibility.
After adopting coal pulverizer outlet rapid closing device, the pulverized coal feed pipe of mill coal pulverizer system cancels one group of installing component (namely cancel in Fig. 11,2), exports rapid closing device realize its original function by employing coal pulverizer.Its course of work is:
Coal pulverizer of the present utility model is utilized to export rapid closing device, make the wind powder mixture out being entered pulverized coal feed pipe by coal pulverizer, the coal pulverizer outlet speed having resistance regulatory function through one is only needed to close the door, the dynamic adjustments of flow velocity in each pulverized coal feed pipe can be realized simultaneously and close isolated function, and ensure that each angle wind powder mixture wind speed is consistent, make wind powder mixture flow field in pulverized coal feed pipe evenly, thus provide better for the installation on pulverized coal feed pipe of wind speed measuring device or coal concentration measuring device, the position more meeting code requirement creates conditions, the wind powder mixture poor fluidity that the too short and installing space of effective solution most power plant pulverized coal preparation system pulverized coal channel is not enough and bring and the problem such as wind powder air-flow is uneven, better meet on-the-spot test requirement.
In sum, the beneficial effect of the utility model embodiment is:
By traditional coal pulverizer outlet portal and drag regulator " two-in-one ", can meet and close rapidly and regulate pulverized coal channel resistance, reduce the equipment that pulverized coal feed pipe is installed, alleviate repair and maintenance workload;
After pulverized coal preparation system adopts coal pulverizer of the present utility model to export rapid closing device, pulverized coal feed pipe reduces by one group of installing component, installing on pulverized coal feed pipe for wind speed measuring device provides the position better, more meeting code requirement to create conditions, and then effectively solve most power plant pulverized coal preparation system pulverized coal channel is too short and installing space not enough and bring wind powder mixture poor fluidity and the problem such as wind powder air-flow is uneven, better meet on-the-spot test requirement.
New device adopts pneumatic control mode, have coal pulverizer outlet rapid closing device and resistance regulatory function concurrently, and energy remote operation, pulverized coal feed pipe resistance random groups operation state is regulated and becomes possibility, improve the control flexibility of drag regulator, for dynamically accurate control of combustion process each angle coal dust speed, concentration etc. creates conditions;
Adopt multiple-blade baffle forms, each blade synchronization adjustment, traditional two-piece type shrinkage cavity (shown in Fig. 1) resistance is avoided to regulate linear, not uneven problem, and then to improve in pulverized coal channel breeze airflow by drag regulator (shrinkage cavity) flow uniformity afterwards, be conducive to promoting coal powder density, the representativeness of breeze airflow sampling and accuracy, improve the accuracy of measuring wind speed;
Adopt cold First air or enchashment to have sealing air as the sealing air of this device, access annular sealing air pipe, effectively solve traditional shrinkage cavity accumulated powder blockage problem, lifting device reliability; Close the slow or close problem that is not closed completely after avoiding traditional coal pulverizer to export rapid closing device blocking simultaneously.
As shown in Figure 9, the utility model embodiment provides a kind of pulverized coal preparation system, described pulverized coal preparation system comprises: coal pulverizer, be connected to many pulverized coal channels 901 of described coal pulverizer, be arranged on the wind speed measuring device 902 on every bar pulverized coal channel 901 and be arranged on the coal pulverizer outlet rapid closing device 903 on every bar pulverized coal channel 901.
Shown in composition graphs 2 and Fig. 3, the coal pulverizer outlet rapid closing device 903 in Fig. 9 comprises: rectangle sealing box body 9, two the first sealing plates 3, baffle mechanism, transmission mechanism 6, drive unit 7 and ring packing airducts.
As shown in Figure 4, rectangle sealing box body 9, is welded between two section of 10 pulverized coal feed pipe 11 by two bottom surfaces.Two the first sealing plates 3, it is inner that baffle mechanism and transmission mechanism 6 are all arranged on rectangle sealing box body 9, and it is outside that drive unit 7 is arranged on rectangle sealing box body 9, not shown in Fig. 4.
As shown in Figures 2 and 3, two the first sealing plates 3 are separately positioned on the relative side 12,13 of two of rectangle sealing box body 9.
Baffle mechanism is by multiple baffle plate 1 and drive multiple rotating shafts 2 of flapper to form, multiple rotating shaft 2 two ends are parallel to be respectively fixed on two other relative side 14,15 of rectangle sealing box body 9, and two the first sealing plates 3 and rotating shaft 2 are in same plane.As depicted in figs. 3 and 5, along rotor shaft direction, one side 16 and the opposite side 17 of bottom surface of the upper bottom surface of each baffle plate 1 have the breach (or being called groove) 18 of a L shape respectively, make when baffle plate 1 closes, the breach between adjacent screen can cooperatively interact and the breach of one, outermost baffle plate and described first sealing plate cooperatively interact.When baffle plate 1 closes, between baffle plate, correlation is as shown in Figure 5, after adjacent screen fits together, and after outermost two baffle plates and two the first sealing plates 3 fit, fill up the breach of L shape, serve good sealing function, can ensure that can effectively block air-flow after blade damper closes passes through, and realizes reliably blocking.
Transmission mechanism 6 is connected respectively with multiple rotating shaft 2.Drive unit 7 connection for transmission mechanism 6, with drive transmission device action, drives multiple rotating shaft 2 to rotate respectively, and the final baffle plate 1 that drives is around axis of rotation, and baffle plate 1 is blade damper in one embodiment, and the utility model is not as limit.
As shown in Figure 2, ring packing wind pipeline 4 is enclosed within the lateral surface of rectangle sealing box body 9, the lateral surface of ring packing airduct 9 is provided with sealing air access port 8, the medial surface of ring packing airduct is provided with multiple sealing air import 19, and sealing air is introduced in rectangle sealing box body 9 by sealing air import 19.Sealing air as shown in Figure 2 sealing air access port 8 enters the ring packing wind pipeline 4 of coal pulverizer outlet rapid closing device.Sealing air pressure is about 2 times of wind powder mixture pressure in pulverized coal feed pipe, can by the inside being entered rectangle sealing box body 9 by multiple sealing air import 19 by multiple directions, and enter into pulverized coal feed pipe by the gap between blade damper and pulverized coal feed pipe, play and block the effect that coal dust enters coal pulverizer outlet rapid closing device inside, avoid coal dust to accumulate blocking blades baffle plate or transmission mechanism, affect the flexibility that mechanism regulates.
As the above analysis, when wind powder mixture flows through coal pulverizer of the present utility model outlet rapid closing device, this coal pulverizer outlet rapid closing device can produce different SRs under different opening position, and then affects flowing velocity and the coal powder density of wind powder mixture.The wind speed measuring device (also can be coal concentration measuring device) 2 in wind powder mixture and downstream with the use of, by the aperture regulating coal pulverizer to export rapid closing device inner vanes baffle plate dynamically, the wind speed (being recorded by wind speed measuring device) that device 2 is monitored or coal powder density (being recorded by coal concentration measuring device) unanimously, realize the object of dynamic adjustments thus.
When " when coal pulverizer outlet rapid closing device receives an out code, drive unit 7 controls blade damper and closes to rapidly minimum aperture, realizes closing and completely cutting off pulverized coal feed pipe, realizes the quick closedown function of coal pulverizer outlet damper thus.
Coal pulverizer of the present utility model is utilized to export rapid closing device, make the wind powder mixture out being entered pulverized coal feed pipe by coal pulverizer, only need the coal pulverizer outlet rapid closing device through with resistance regulatory function, the dynamic adjustments of flow velocity in each pulverized coal feed pipe can be realized simultaneously and close isolated function, and ensure that each angle wind powder mixture wind speed is consistent, make wind powder mixture flow field in pulverized coal feed pipe evenly, thus provide better for the installation on pulverized coal feed pipe of wind speed measuring device or coal concentration measuring device, the position more meeting code requirement creates conditions, the wind powder mixture poor fluidity that the too short and installing space of effective solution most power plant pulverized coal preparation system pulverized coal channel is not enough and bring and the problem such as wind powder air-flow is uneven, better meet on-the-spot test requirement.
Above-mentioned coal pulverizer outlet rapid closing device only on rectangle sealing box body 9, two of non-fixed rotating shaft 2 relative sides (being parallel to two sides of rotating shaft) 12,13 has installed two the first sealing plates 3, not fixing seal baffle plate on two of fixed rotating shaft 2 relative sides 14,15.In order to make better tightness, in one embodiment, as shown in Figure 6, two of fixed rotating shaft 2 relative sides 14,15 are provided with multipair second sealing plate 20, multipair second sealing plate 20 and multiple rotating shaft 2 are in same plane, the two panels baffle plate of often pair of second sealing plate divides the both sides standing in a rotating shaft wherein one end, and make when the shutters are closed, often pair of second sealing plate coordinates with the breach on corresponding baffle plate both sides respectively.Below in conjunction with Fig. 7 and Fig. 8, for one of them rotating shaft 2 on side 14, illustrate and how to realize sealing by often pair of second sealing plate 20.As shown in Figure 7, rotating shaft 2 fixing on side 14 is rotated, and drive baffle plate 1 to rotate clockwise, just can obtain the closure state shown in Fig. 8, this has filled up the L v notch v 18 of baffle plate 1 respectively to two pieces of baffle plates 21,22 of the second sealing plate 20, achieves better sealing.
Above-mentioned drive unit 7 can be pneumatic or Vidacare corp, such as, be electric motor or pneumatic motor.The transmission mechanism 6 of coal pulverizer outlet rapid closing device is driven by pneumatic or Vidacare corp, can quick closedown in 3s, meets the requirement of accident conditions or normal stoppage in transit operating mode fast shut-off fuel.
In one embodiment, the number of baffle mechanism is 5, and the utility model is not as limit.Blade damper can be made up of wear-resistant alloy, totally 5 are enclosed in rectangle sealing box body (metal shell) 9, and are installed in pulverized coal channel, as shown in Figure 3, blade is opening and closing simultaneously under the drive of transmission device 7, plays closing baffle plate or even throttling action.The Multi-vane type baffle arrangement of coal pulverizer outlet rapid closing device, blade action is more flexible, and resistance regulates evenly, reaches even regulation flow velocity, the conforming effect in flow field after guarantee throttling.In addition, the blade damper of coal pulverizer outlet rapid closing device can realize pneumatic control adjustment operation within the scope of completely open and close, and making mill coal pulverizer system carry out pulverized coal channel SR dynamic conditioning at normal operation period becomes possibility.
After adopting coal pulverizer outlet rapid closing device, the pulverized coal feed pipe of mill coal pulverizer system cancels one group of installing component (namely cancel in Fig. 11,2), exports rapid closing device realize its original function by employing coal pulverizer.Its course of work is:
Coal pulverizer of the present utility model is utilized to export rapid closing device, make the wind powder mixture out being entered pulverized coal feed pipe by coal pulverizer, the coal pulverizer outlet speed having resistance regulatory function through one is only needed to close the door, the dynamic adjustments of flow velocity in each pulverized coal feed pipe can be realized simultaneously and close isolated function, and ensure that each angle wind powder mixture wind speed is consistent, make wind powder mixture flow field in pulverized coal feed pipe evenly, thus provide better for the installation on pulverized coal feed pipe of wind speed measuring device or coal concentration measuring device, the position more meeting code requirement creates conditions, the wind powder mixture poor fluidity that the too short and installing space of effective solution most power plant pulverized coal preparation system pulverized coal channel is not enough and bring and the problem such as wind powder air-flow is uneven, better meet on-the-spot test requirement.
In sum, the beneficial effect of the utility model embodiment is:
By traditional coal pulverizer outlet portal and drag regulator " two-in-one ", can meet and close rapidly and regulate pulverized coal channel resistance, reduce the equipment that pulverized coal feed pipe is installed, alleviate repair and maintenance workload;
After pulverized coal preparation system adopts coal pulverizer of the present utility model to export rapid closing device, pulverized coal feed pipe reduces by one group of installing component, installing on pulverized coal feed pipe for wind speed measuring device provides the position better, more meeting code requirement to create conditions, and then effectively solve most power plant pulverized coal preparation system pulverized coal channel is too short and installing space not enough and bring wind powder mixture poor fluidity and the problem such as wind powder air-flow is uneven, better meet on-the-spot test requirement.
New device adopts pneumatic control mode, have coal pulverizer outlet rapid closing device and resistance regulatory function concurrently, and energy remote operation, pulverized coal feed pipe resistance random groups operation state is regulated and becomes possibility, improve the control flexibility of drag regulator, for dynamically accurate control of combustion process each angle coal dust speed, concentration etc. creates conditions;
Adopt multiple-blade baffle forms, each blade synchronization adjustment, traditional two-piece type shrinkage cavity (shown in Fig. 1) resistance is avoided to regulate linear, not uneven problem, and then to improve in pulverized coal channel breeze airflow by drag regulator (shrinkage cavity) flow uniformity afterwards, be conducive to promoting coal powder density, the representativeness of breeze airflow sampling and accuracy, improve the accuracy of measuring wind speed;
Adopt cold First air or enchashment to have sealing air as the sealing air of this device, access annular sealing air pipe, effectively solve traditional shrinkage cavity accumulated powder blockage problem, lifting device reliability; Close the slow or close problem that is not closed completely after avoiding traditional coal pulverizer to export rapid closing device blocking simultaneously.
Apply specific embodiment in the utility model to set forth principle of the present utility model and embodiment, the explanation of above embodiment just understands method of the present utility model and core concept thereof for helping; Meanwhile, for one of ordinary skill in the art, according to thought of the present utility model, all will change in specific embodiments and applications, in sum, this description should not be construed as restriction of the present utility model.
Claims (10)
1. a coal pulverizer outlet rapid closing device, is characterized in that, described coal pulverizer outlet rapid closing device comprises:
Rectangle sealing box body, described rectangle sealing box body is welded between two sections of pulverized coal feed pipes by two bottom surfaces;
Two the first sealing plates, are arranged on the relative side of two of described rectangle sealing box body;
Baffle mechanism, by multiple baffle plate and drive multiple rotating shafts of flapper to form, multiple rotating shaft two ends are respectively on parallel two other relative side being fixed on described rectangle sealing box body, and described first sealing plate and described rotating shaft are in same plane; Along rotor shaft direction, the upper bottom surface of each baffle plate while there is the breach of a L shape respectively with the opposite side of bottom surface, make when the shutters are closed, the breach between adjacent screen cooperatively interacts, and the breach of one, outermost baffle plate and described first sealing plate cooperatively interact;
Transmission mechanism, is connected respectively with multiple rotating shaft;
Drive unit, connects described transmission mechanism, for driving described transmission mechanism;
Ring packing airduct, be enclosed within described rectangle sealing box body lateral surface, the lateral surface of described ring packing airduct is provided with sealing air access port, and the medial surface of described ring packing airduct is provided with multiple sealing air import, and sealing air is introduced in described rectangle sealing box body by described sealing air import.
2. coal pulverizer outlet rapid closing device according to claim 1, is characterized in that, described coal pulverizer outlet rapid closing device also comprises:
Multipair second sealing plate, be arranged on the relative side of two of fixing described rotating shaft, and with multiple described rotating shaft in same plane, often pair of second sealing plate divides the both sides standing in a rotating shaft wherein one end, make when the shutters are closed, often pair of second sealing plate coordinates with the breach on baffle plate both sides respectively.
3. coal pulverizer outlet rapid closing device according to claim 1, it is characterized in that, described drive unit is pneumatic or Vidacare corp.
4. coal pulverizer outlet rapid closing device according to claim 1, it is characterized in that, the number of described baffle mechanism is 5.
5. coal pulverizer outlet rapid closing device according to claim 1, it is characterized in that, described rectangle sealing box body is metal case.
6. a mill coal pulverizer system, it is characterized in that, described pulverized coal preparation system comprises: coal pulverizer, be connected to many pulverized coal channels of described coal pulverizer, be arranged on the wind speed measuring device on pulverized coal channel described in every bar and be arranged on the coal pulverizer outlet rapid closing device as claimed in claim 1 on pulverized coal channel described in every bar.
7. mill coal pulverizer system according to claim 6, is characterized in that, described coal pulverizer outlet rapid closing device also comprises:
Multipair second sealing plate, be arranged on the relative side of two of fixing described rotating shaft, and with multiple described rotating shaft in same plane, often pair of second sealing plate divides the both sides standing in a rotating shaft wherein one end, make when the shutters are closed, often pair of second sealing plate coordinates with the breach on baffle plate both sides respectively.
8. mill coal pulverizer system according to claim 6, is characterized in that, described drive unit is pneumatic or Vidacare corp.
9. mill coal pulverizer system according to claim 6, is characterized in that, the number of described baffle mechanism is 5.
10. mill coal pulverizer system according to claim 6, is characterized in that, described rectangle sealing box body is metal case.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420734154.9U CN204268500U (en) | 2014-11-28 | 2014-11-28 | Coal pulverizer outlet rapid closing device and mill coal pulverizer system |
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| CN201420734154.9U CN204268500U (en) | 2014-11-28 | 2014-11-28 | Coal pulverizer outlet rapid closing device and mill coal pulverizer system |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105698206A (en) * | 2014-11-28 | 2016-06-22 | 国家电网公司 | Rapid door-closing device for outlet of coal mill, and coal pulverizing system of coal mill |
| CN109737448A (en) * | 2019-02-25 | 2019-05-10 | 西安热工研究院有限公司 | A kind of built-in type energy saving moulded coal powder distributor |
| CN116557896A (en) * | 2023-03-31 | 2023-08-08 | 华能平凉发电有限责任公司 | Air supply adjusting device for coal powder conveying pipe of coal mill |
-
2014
- 2014-11-28 CN CN201420734154.9U patent/CN204268500U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105698206A (en) * | 2014-11-28 | 2016-06-22 | 国家电网公司 | Rapid door-closing device for outlet of coal mill, and coal pulverizing system of coal mill |
| CN105698206B (en) * | 2014-11-28 | 2018-09-07 | 国家电网公司 | Coal pulverizer exports rapid closing device and mill coal pulverizer system |
| CN109737448A (en) * | 2019-02-25 | 2019-05-10 | 西安热工研究院有限公司 | A kind of built-in type energy saving moulded coal powder distributor |
| CN116557896A (en) * | 2023-03-31 | 2023-08-08 | 华能平凉发电有限责任公司 | Air supply adjusting device for coal powder conveying pipe of coal mill |
| CN116557896B (en) * | 2023-03-31 | 2023-11-03 | 华能平凉发电有限责任公司 | Air supply adjusting device for coal powder conveying pipe of coal mill |
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