CN102764687A - Medium speed mill primary separation dynamic regulating system and its regulating method - Google Patents
Medium speed mill primary separation dynamic regulating system and its regulating method Download PDFInfo
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- CN102764687A CN102764687A CN2011101124968A CN201110112496A CN102764687A CN 102764687 A CN102764687 A CN 102764687A CN 2011101124968 A CN2011101124968 A CN 2011101124968A CN 201110112496 A CN201110112496 A CN 201110112496A CN 102764687 A CN102764687 A CN 102764687A
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Abstract
A medium speed mill primary separation dynamic regulating system comprises an external regulating device, a master control device, a primary separation regulating device and a limit feedback device. The primary separation regulating device also comprises a transmission device and a vane variable area mechanism. A regulating method of the medium speed mill primary separation dynamic regulating system comprises the following steps of: the external regulating device is started; the master control device receives an input signal from the external regulating device and moves upwards or downwards; the transmission device of the primary separation regulating device is driven by the master control device to drive the vane variable area mechanism to move towards or far away from the circle center of a millstone; and the limit feedback device feeds back positional information obtained from the vane variable area mechanism to the external regulating device. The medium speed mill primary separation dynamic regulating system provided by the invention not only can meet needs of different coal types, but also can realize online dynamic change of its primary separation characteristics. The medium speed mill primary separation dynamic regulating system is simple to operate and can be used to raise output of coal pulverizing and coal dust quality.
Description
Technical field
The present invention relates to coal-fired station and adopt wider pulverized coal preparation, drying and transport, relate in particular to a kind of medium-speed pulverizer first separation dynamic adjusting system and control method thereof.
Background technology
Coal pulverizer is the important component part of power plant's pulverized coal preparation system, is the important Auxiliary Power Unit of power plant, and its main task is with coal crusher and wears into coal dust that offer boiler plant, the quality of its configuration will directly influence the security and the economy of unit.Because different coal pulverizers are bigger to the adaptability difference of different coals, in conjunction with the uneven actual conditions of the Regional Distribution of China's coal article, the quality of coal article will directly have influence on the economy of pulverized coal preparation system operation.The pattern of coal pulverizer is a lot, can be divided into three types by the rotating speed of coal-grinding workpiece, promptly low speed coal mill, medium-speed pulverizer and high speed coal mill.
Low speed coal mill: rotating speed is 15～25r/min, typical case's representative: ball mill.
Medium-speed pulverizer: rotating speed is 50～300r/min, typical case's representative: HP type medium-speed pulverizer, MPS type medium-speed pulverizer, MBF medium-speed pulverizer, ATOX coal pulverizer.
High speed coal mill: rotating speed is 750～1500r/min, typical case's representative: blower mill, hammering coal pulverizer.
The supporting medium-speed pulverizer of coal fired power generation unit is raw coal to be ground become to meet the grinding machinery that necessarily requires coal dust, and wherein first and second separation is the important step that guarantees the coal pulverizer performance.The design of coal pulverizer at present is just to single coal, and the first separation device is uncontrollable when operation, and can only when coal pulverizer is shut down maintenance, manual work carry out, and needs the long repair time, influences unit output.
Because the coal market changes, coal pulverizer need adapt to the grinding demand of many coals, and existing coal pulverizer can't satisfy finished product powder process requirement when coal changes greatly, and it is obvious especially with the influence of powder process quality that powder process is exerted oneself.Therefore, can make medium-speed pulverizer realize that the first separation dynamic adjusting system of online adjusting is the necessary guarantee that satisfies coal pulverizer nonferromagnetic substance under many coals condition.
To the problem that prior art exists, this case designer relies on the industry experience for many years of being engaged in, and the active research improvement is so had medium-speed pulverizer first separation dynamic adjusting system of the present invention and control method thereof.
Summary of the invention
The present invention be directed in the prior art, the design of existing medium-speed pulverizer is just to single coal, and the first separation device is defective such as unadjustable when operation, and a kind of medium-speed pulverizer first separation dynamic adjusting system is provided.
Another purpose of the present invention is in the prior art; The design of existing medium-speed pulverizer is just to single coal; The first separation device is unadjustable when operation, and can only when coal pulverizer is shut down maintenance, manual work carry out, and needs the long repair time; Influence defectives such as unit output, a kind of control method of medium-speed pulverizer first separation dynamic adjusting system is provided.
In order to address the above problem, the present invention provides a kind of medium-speed pulverizer first separation dynamic adjusting system, and said medium-speed pulverizer first separation dynamic adjusting system comprises: the external adjustment device, in order to start said medium-speed pulverizer first separation dynamic adjusting system; Master control set in order to the input signal of acceptance from the external adjustment device, and is controlled by said external adjustment device; The first separation adjusting device; Said first separation adjusting device further comprises transmission device and vane variable area mechanism; One end of said transmission device and said master control set flexibly connect; The other end of said transmission device and said vane variable area mechanism flexibly connect, and said vane variable area mechanism is movably arranged on the said vane; Spacing feedback device, the signal input part of said spacing feedback device and said vane variable area mechanism electrically connect, and the signal output part of said spacing feedback device and the electric connection of said external adjustment device.
Optional, the quantity of said vane variable area mechanism is 4.
Optional, said vane variable area mechanism is movably arranged on said vane upside through slide rail.
Optional, said vane variable area mechanism adopts the arc design with the concyclic heart of said mill, and the width of said vane variable area mechanism is greater than the width of vane.
For realizing another purpose of the present invention, the present invention provides the control method of medium-speed pulverizer first separation dynamic adjusting system, and said control method comprises: start the external adjustment device, and send input signal to master control set; Master control set is received the input signal from the external adjustment device, up or down motion; The transmission device of first separation adjusting device drives vane variable area mechanism and is tending towards the mill home position or deviates from the mill home position and move under the driving of master control set; The spacing feedback device that electrically connects with the vane variable area mechanism of said first separation adjusting device feeds back to the external adjustment device with the positional information of the vane variable area mechanism that obtains; The external adjustment device just can further be adjusted input signal, to satisfy different coal needs.
Optional, the motion mode of described master control set is: all cappings that enlarge vane when needs are long-pending, then control master control set and move downward; The all cappings that reduce vane when needs are long-pending, then control master control set and move upward.
Optional, described vane variable area motion of mechanism mode is: when master control set moved downward, vane variable area mechanism deviated from the mill home position synchronously and moves; When master control set moved upward, vane variable area mechanism was tending towards the mill home position synchronously and moves.
In sum, medium-speed pulverizer first separation dynamical system of the present invention and control method thereof not only can satisfy the needs of different coals, and can line dynamic change its stalling characteristic, and be simple to operate, improves powder process and exert oneself and the coal dust quality.
Description of drawings
Fig. 1 is the frame diagram of the first separation dynamical system of medium-speed pulverizer first separation dynamical system of the present invention and control method thereof;
Fig. 2 is the side-looking structural representation of the first separation dynamical system of medium-speed pulverizer first separation dynamical system of the present invention and control method thereof;
Fig. 3 is the plan structure sketch map of the first separation dynamical system of medium-speed pulverizer first separation dynamical system of the present invention and control method thereof.
The specific embodiment
By the technology contents, the structural feature that specify the invention, reached purpose and effect, will combine embodiment and conjunction with figs. to specify below.
See also Fig. 1, shown in Figure 1 is the frame diagram of medium-speed pulverizer first separation dynamic adjusting system 1.Said medium-speed pulverizer first separation dynamic adjusting system 1 comprises external adjustment device 10, the first separation adjusting device 12 that drives by the master control set 11 of said external adjustment device 10 controls, by said master control set 11, and the spacing feedback device 13 that electrically connects with said first separation adjusting device 12.Said spacing feedback device 13 just feeds back to external adjustment device 10 with the positional information of first separation adjusting device 12.Wherein, said first separation adjusting device 12 further comprises the transmission device 121 that flexibly connects with said master control set 11, and the vane variable area mechanism 122 that electrically connects with said spacing feedback device 13.The signal input part of said spacing feedback device 13 and said vane variable area mechanism 122 electrically connect, and the signal output part of said spacing feedback device 13 and 10 electric connections of said external adjustment device.
See also Fig. 2, shown in Figure 2 is the side-looking structural representation of medium-speed pulverizer first separation dynamic adjusting system 1.Wherein, The first separation adjusting device 12 of said medium-speed pulverizer first separation dynamic adjusting system 1 comprises some separate vane variable area mechanisms 122, and flexibly connects with said vane variable area mechanism 122 and in order to control the transmission device 121 that said vane variable area mechanism 122 is tending towards mill 2 centers of circle or deviates from the motion of mill 2 centers of circle.In the present invention, said transmission device 121 is a follower link.One end of said transmission device 121 and vane variable area mechanism 122 flexibly connect, and the other end of said transmission device 121 and said master control set 11 flexibly connect.
See also Fig. 3, shown in Figure 3 is the plan structure sketch map of medium-speed pulverizer first separation dynamic adjusting system 1.In the present invention, said vane variable area mechanism 122 preferred 4, and said vane variable area mechanism 122 vane 3 places that are distributed in said mill 2 extension positions symmetrically.Said vane variable area mechanism 122 adopts the arc design with the said mill 2 concyclic hearts, and the width of said vane variable area mechanism 122 is greater than the width of vane 3.Said vane variable area mechanism 122 is movably arranged on the upside of said vane 3 through slide rail (not shown).
Please continue to participate in Fig. 1, and combine to consult Fig. 2, Fig. 3, the operation principle of medium-speed pulverizer first separation dynamic adjusting system 1 is detailed.The parts of milling of said medium-speed pulverizer comprise initiatively abrasive body and driven abrasive body two parts; Raw coal drops down onto on the active abrasive body after getting into the medium-speed pulverizer with first separation adjusting device; Under the effect of active abrasive body rotary centrifugal force to peripolesis; The entering zone of milling contact also transferring power with the driven body of milling, driven abrasive body begins to rotate, and with the active abrasive body raw coal is rolled into powder.Also be applied with spring force, hydraulic coupling or other external force on the driven abrasive body to reach desirable grinding effect.Through the rotation of active abrasive body, the coal dust of wearing into is got rid of to vane 3 places of mill 2 peripheries.According to the difference and the suitable separating effect of assurance of coal, the present invention realizes dynamic regulation to first separation in the medium-speed pulverizer running, promptly in the first separation process, the area of vane 3 is effectively regulated and control, and concrete regulate and control method comprises:
The first, start external adjustment device 10, and send input signal to master control set 11;
The second, master control set 11 is received the input signal from external adjustment device 10, up or down motion; Particularly, different according to coal, all cappings that enlarge vane 3 like need are long-pending, then control master control set 11 and move downward; Otherwise all cappings that reduce vane 3 like need are long-pending, then control master control set 11 and move upward.
The transmission device 121 of three, first separation adjusting device 12 drives vane variable area mechanism 122 and is tending towards mill 2 home positions or deviates from mill 2 home positions and move under the driving of master control set 11; Particularly, when master control set 11 moved downward, vane variable area mechanism 122 deviated from mill 2 home positions synchronously and moves, and all cappings of vane 3 are long-pending to become big; When master control set 11 moved upward, vane variable area mechanism 122 was tending towards mill 2 home positions synchronously and moves, and all cappings of vane 3 are long-pending to diminish.
Four, the spacing feedback device 13 that electrically connects with the vane variable area mechanism of said first separation adjusting device 12 122 feeds back to external adjustment device 10 with the positional information of the vane variable area mechanism 122 that obtains; External adjustment device 10 just can further be adjusted input signal, to satisfy different coal needs.
In the long-pending change of all cappings of vane 3, vane 3 outlet wind speed also change.Thereby; Medium-speed pulverizer first separation dynamical system of the present invention can satisfy the demand of different coals; The hot blast of different in flow rate of vane chamber of flowing through takes these coal dusts to the coal dust classifier on medium-speed pulverizer top; Thinner coal dust is sent to the burner hearth burning, the then separated grinding again of getting off of thick excessively coal dust.
In sum, medium-speed pulverizer first separation dynamical system of the present invention and control method thereof not only can satisfy the needs of different coals, and can line dynamic change its stalling characteristic, and be simple to operate, improves powder process and exert oneself and the coal dust quality.
Those skilled in the art all should be appreciated that, under the situation that does not break away from the spirit or scope of the present invention, can carry out various modifications and modification to the present invention.Thereby, if when any modification or modification fall in the protection domain of appended claims and equivalent, think that the present invention contains these modifications and modification.
Claims (7)
1. medium-speed pulverizer first separation dynamic adjusting system, it is characterized in that: said medium-speed pulverizer first separation dynamic adjusting system comprises:
The external adjustment device is in order to start said medium-speed pulverizer first separation dynamic adjusting system;
Master control set in order to the input signal of acceptance from the external adjustment device, and is controlled by said external adjustment device;
The first separation adjusting device; Said first separation adjusting device further comprises transmission device and vane variable area mechanism; One end of said transmission device and said master control set flexibly connect; The other end of said transmission device and said vane variable area mechanism flexibly connect, and said vane variable area mechanism is movably arranged on the said vane;
Spacing feedback device, the signal input part of said spacing feedback device and said vane variable area mechanism electrically connect, and the signal output part of said spacing feedback device and the electric connection of said external adjustment device.
2. medium-speed pulverizer first separation dynamic adjusting system as claimed in claim 1 is characterized in that, the quantity of said vane variable area mechanism is 4.
3. medium-speed pulverizer first separation dynamic adjusting system as claimed in claim 1 is characterized in that, said vane variable area mechanism is movably arranged on said vane upside through slide rail.
4. medium-speed pulverizer first separation dynamic adjusting system as claimed in claim 1 is characterized in that, said vane variable area mechanism adopts the arc design with the concyclic heart of said mill, and the width of said vane variable area mechanism is greater than the width of vane.
5. the control method of medium-speed pulverizer first separation dynamic adjusting system as claimed in claim 1 is characterized in that, said control method comprises:
Start the external adjustment device, and send input signal to master control set;
Master control set is received the input signal from the external adjustment device, up or down motion;
The transmission device of first separation adjusting device drives vane variable area mechanism and is tending towards the mill home position or deviates from the mill home position and move under the driving of master control set;
The spacing feedback device that electrically connects with the vane variable area mechanism of said first separation adjusting device feeds back to the external adjustment device with the positional information of the vane variable area mechanism that obtains; The external adjustment device just can further be adjusted input signal, to satisfy different coal needs.
6. the control method of medium-speed pulverizer first separation dynamic adjusting system as claimed in claim 5 is characterized in that, the motion mode of described master control set is: all cappings that enlarge vane when needs are long-pending, then control master control set and move downward; The all cappings that reduce vane when needs are long-pending, then control master control set and move upward.
7. the control method of medium-speed pulverizer first separation dynamic adjusting system as claimed in claim 5; It is characterized in that; Described vane variable area motion of mechanism mode is: when master control set moved downward, vane variable area mechanism deviated from the mill home position synchronously and moves; When master control set moved upward, vane variable area mechanism was tending towards the mill home position synchronously and moves.
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| CN201110112496.8A CN102764687B (en) | 2011-05-03 | 2011-05-03 | Medium speed mill primary separation dynamic regulating system and its regulating method |
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| CN201110112496.8A CN102764687B (en) | 2011-05-03 | 2011-05-03 | Medium speed mill primary separation dynamic regulating system and its regulating method |
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Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
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| US4385730A (en) * | 1979-10-18 | 1983-05-31 | F. L. Smidth & Co. | Roller mill |
| EP0988895A2 (en) * | 1998-09-25 | 2000-03-29 | Loesche Gmbh | Vane wheel arrangement for air current roller mills |
| CN2737463Y (en) * | 2004-06-08 | 2005-11-02 | 郭长岭 | Roller medium speed coal mill |
| CN201181008Y (en) * | 2008-03-24 | 2009-01-14 | 上海开能新技术工程有限公司 | Intermediate speed coal mill |
| JP2009195897A (en) * | 2008-01-24 | 2009-09-03 | Mitsubishi Heavy Ind Ltd | Roller mill structure |
| CN101947484A (en) * | 2010-09-10 | 2011-01-19 | 浙江省电力试验研究院 | Method for reducing discharge capacity of cobble coal of intermediate-speed coal mill |
| CN201807409U (en) * | 2010-09-29 | 2011-04-27 | 莱歇研磨机械制造(上海)有限公司 | Polygonal adjustable air ring for roller type mill |
| CN202052608U (en) * | 2011-05-03 | 2011-11-30 | 华东电力试验研究院有限公司 | Primary separation dynamic adjustment system of intermediate-speed coal grinding machine |
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2011
- 2011-05-03 CN CN201110112496.8A patent/CN102764687B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4385730A (en) * | 1979-10-18 | 1983-05-31 | F. L. Smidth & Co. | Roller mill |
| EP0988895A2 (en) * | 1998-09-25 | 2000-03-29 | Loesche Gmbh | Vane wheel arrangement for air current roller mills |
| CN2737463Y (en) * | 2004-06-08 | 2005-11-02 | 郭长岭 | Roller medium speed coal mill |
| JP2009195897A (en) * | 2008-01-24 | 2009-09-03 | Mitsubishi Heavy Ind Ltd | Roller mill structure |
| CN201181008Y (en) * | 2008-03-24 | 2009-01-14 | 上海开能新技术工程有限公司 | Intermediate speed coal mill |
| CN101947484A (en) * | 2010-09-10 | 2011-01-19 | 浙江省电力试验研究院 | Method for reducing discharge capacity of cobble coal of intermediate-speed coal mill |
| CN201807409U (en) * | 2010-09-29 | 2011-04-27 | 莱歇研磨机械制造(上海)有限公司 | Polygonal adjustable air ring for roller type mill |
| CN202052608U (en) * | 2011-05-03 | 2011-11-30 | 华东电力试验研究院有限公司 | Primary separation dynamic adjustment system of intermediate-speed coal grinding machine |
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