CN105003665A - Regulating valve for pulverized coal distribution as well as pulverized coal feed pipe and separator applying regulating valves - Google Patents
Regulating valve for pulverized coal distribution as well as pulverized coal feed pipe and separator applying regulating valves Download PDFInfo
- Publication number
- CN105003665A CN105003665A CN201510498765.7A CN201510498765A CN105003665A CN 105003665 A CN105003665 A CN 105003665A CN 201510498765 A CN201510498765 A CN 201510498765A CN 105003665 A CN105003665 A CN 105003665A
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- China
- Prior art keywords
- valve
- separator
- pulverized coal
- valve plate
- powder
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
- F16K1/16—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces with pivoted closure-members
- F16K1/18—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces with pivoted closure-members with pivoted discs or flaps
- F16K1/22—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces with pivoted closure-members with pivoted discs or flaps with axis of rotation crossing the valve member, e.g. butterfly valves
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
- F16K1/16—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces with pivoted closure-members
- F16K1/18—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces with pivoted closure-members with pivoted discs or flaps
- F16K1/22—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces with pivoted closure-members with pivoted discs or flaps with axis of rotation crossing the valve member, e.g. butterfly valves
- F16K1/222—Shaping of the valve member
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
- F16K1/16—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces with pivoted closure-members
- F16K1/18—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces with pivoted closure-members with pivoted discs or flaps
- F16K1/22—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces with pivoted closure-members with pivoted discs or flaps with axis of rotation crossing the valve member, e.g. butterfly valves
- F16K1/226—Shaping or arrangements of the sealing
- F16K1/2268—Sealing means for the axis of rotation
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
- F16K1/32—Details
- F16K1/48—Attaching valve members to screw-spindles
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K25/00—Details relating to contact between valve members and seat
- F16K25/005—Particular materials for seats or closure elements
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23K—FEEDING FUEL TO COMBUSTION APPARATUS
- F23K3/00—Feeding or distributing of lump or pulverulent fuel to combustion apparatus
- F23K3/02—Pneumatic feeding arrangements, i.e. by air blast
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23N—REGULATING OR CONTROLLING COMBUSTION
- F23N1/00—Regulating fuel supply
Abstract
The invention relates to a regulating valve for pulverized coal distribution as well as a pulverized coal feed pipe and a separator applying the regulating valves. The regulating valve comprises a valve seat, a valve plate rotationally mounted on the valve seat as well as an execution mechanism capable of driving the valve plate to rotate. The regulating valve for pulverized coal distribution is mounted at a pulverized coal feed end of the pulverized coal feed pipe, the valve seat of the regulating valve is mounted on the side wall of the pulverized coal feed pipe, the valve plate extends into the pulverized coal feed pipe and is perpendicular to the axis of the section of the pulverized coal feed pipe, and the execution mechanism is located outside the pulverized coal feed pipe. Multiple regulating valves for pulverized coal distribution are mounted on the separator, the valve seats of the regulating valves are mounted on the side wall of the separator, the valve plates extend into the separator and are perpendicular to the axis of the separator, and the execution mechanisms are located outside the separator. A dynamic field can be adjusted continuously in the separator, so that primary air pipe air and pulverized coal distribution is more uniform, combustion is optimized, and the safety and the control precision are higher.
Description
Technical field
The present invention relates to coal fired boiler technical field, particularly relate to a kind of coal powder distribation modulating valve and apply powder feeding pipes, the separator of this modulating valve.
Background technique
In coal fired boiler, the wind powder of primary air piping distributes the harmonious Security for boiler operatiopn, Economy and the feature of environmental protection and has material impact.Primary wind and powder distributes inequality and there will be the problems such as furnace flame center deflection, the slagging scorification of burner hearth regional area, hearth combustion region combustion pulsation, and this not only can cause combustion instability, even can cause overtemperature tube burst time serious.In addition, it is uneven that wind powder distributes, and also reduces the combustion efficiency of boiler, add simultaneously
nO xgrowing amount, this is also safe operation of power plant and energy-saving and emission-reduction urgent problem.
For the unit pulverized-coal system that side coal bunker coal pulverizer common is at present arranged, cause wind powder to distribute unbalanced main cause to be, the far and near position of its each burner is different, the situations such as the length of powder feeding pipes and elbow are also different, therefore the pipe resistance of each primary air piping is different, thus cause each pipeline enclosure wind powder to distribute uneven.Realize between the pipeline of different resistance into powder amount balance be the resolving ideas that balanced wind powder distributes, how to primary air piping enter powder amount and coal powder density carries out flexibly, effectively regulate and control to become a large important subject of current related domain.
One of solution of prior art is the method adopting cold conditions leveling, that is: in each First air pipeline, adjustable contraction is installed, by regulating the opening diameter size of each adjustable contraction to regulate each primary air piping pipe resistance in the cold conditions situation of pure wind flow, by change resistance change enter each pipeline enter powder amount.But in practical application, even if the pure air of cold conditions leveling reaches good effect, still there will be very large deviation in hot band powder situation, in conjunction with traditional shrinkage cavity resistance adjusting element, the program can not ensure that the concentration entering pulverized coal channel reaches balance.
Separately there are No. 201410092154.8 Chinese invention patent applications, disclose a kind of coal pulverizer full automatic pulverized coal concentration adjusting device, it is made up of coal powder density controllable register, drive unit and control unit, controllable register is driven to rotate by control unit accessory drive, thus change breeze airflow flow direction, and then regulate the coal dust amount entering each coal pipe.But the program still has problems in practical application: first, the program abandons manual control mode completely, and circumstance complication residing for coal stove, control signal is very easily interfered, and therefore the safety reliability of so-called Automatic Control causes anxiety; Secondly, the program changes the direction of screening area to powder feeding pipes and breeze airflow with regulating fender angle, and realize the control to entering powder amount, it cannot realize the transient equiliblium between each pipeline, and control accuracy is not high; Finally, the mode that the program discloses three kinds of controlling device structures and is arranged in separator, each all needs directly on separator, to install running shaft, this make to the modification difficulty of existing separator compared with large, duration compared with long, component are many.
As can be seen here, above-mentioned existing coal powder density controlling device with in use in structure, obviously still has inconvenience and defect, and is urgently further improved.How to found a kind of structure simpler, easier for installation, really can realize transient equiliblium between each pipeline and safe and reliable new coal powder distribation modulating valve and apply powder feeding pipes, the separator of this modulating valve, belong to one of target need improved current industry pole in fact.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of coal powder distribation modulating valve and applies powder feeding pipes, the separator of this modulating valve, make its structure simpler, easier for installation, really can realize transient equiliblium between each pipeline and safe and reliable, thus it is not enough to overcome existing coal powder density controlling device.
For solving the problems of the technologies described above, a kind of coal powder distribation modulating valve of the present invention, comprising: valve seat; The rotating valve plate be arranged on valve seat; And the actuator driving valve plate to rotate.
As further improvement, the area of described valve plate is 30% ~ 50% of pulverized coal channel cross-section area.
Described actuator drives valve plate to rotate by valve shaft.
Described valve shaft one end is embedded in valve plate, or one-body molded with valve plate.
Described valve shaft and valve seat joint and/or valve seat arranged outside have self-compensation type redundant seal structure.
Described valve plate is flat, and its shaft section is water-drop-shaped or the airfoil of bullet-headed, front round metacone, and its cross section is the thicker symmetric polygonal in oval, rectangle or axis place.
Described valve plate is made up of wear-resistant steel material.
Described actuator is manual, pneumatic or electric actuator.
In addition, present invention also offers a kind of powder feeding pipes, its powder entering end is provided with above-mentioned coal powder distribation modulating valve, the valve seat of described modulating valve is arranged on the sidewall of powder feeding pipes, described valve plate to extend in powder feeding pipes and the axes normal of section powder feeding pipes therewith, and described actuator is positioned at outside powder feeding pipes.
Finally, present invention also offers a kind of separator, it is provided with several above-mentioned coal powder distribation modulating valve, and the valve seat of described modulating valve is arranged on the sidewall of separator, described valve plate to extend in separator and with the axes normal of separator, described actuator is positioned at outside separator.
After adopting such design, the present invention at least has the following advantages:
1, the present invention is when being with powder to run, valve plate can rotate by 0-180 degree in pipeline, its guide functions can consecutive variations and the linearity better, thus can to regulate continuously aerodynamic field in separator, each First air manage-style powder is distributed more even, burning is optimized;
2, manual, automatic or the two control configuration mode combined can be selected as required, fully meet different operating environmental demand, guarantee safety and reliability;
3, the present invention is by regulating fender angle, both directly can adjust the screening area to pipeline, thus directly regulate the coal dust amount entering corresponding powder conveying pipe, more can the coal powder cyclone in separator be had an impact, to change its aerodynamic field, the coal powder distribation between each pipeline is made to realize transient equiliblium;
4, considered critical baffle plate area of the present invention, has fundamentally stopped the generation that controlling device blocks powder conveying pipe situation, has greatly reduced the threat to coal fired boiler security of operation;
When 5, existing coal pulverizer equipment being reequiped, directly on separator or powder feeding pipes, offer mounting hole, namely realize the installation of modulating valve of the present invention by valve seat, convenient and swift.
Accompanying drawing explanation
Above-mentioned is only the general introduction of technical solution of the present invention, and in order to better understand technological means of the present invention, below in conjunction with accompanying drawing and embodiment, the present invention is described in further detail.
Fig. 1 is the structural representation of the separator applying coal powder distribation modulating valve of the present invention.
Fig. 2 is the left TV structure schematic diagram that in Fig. 1, valve plate is in level.
Fig. 3 is the left TV structure schematic diagram that in Fig. 1, valve plate is in plumbness.
Fig. 4 is the oval cross section schematic diagram of valve plate of the present invention.
Fig. 5 is the rectangular cross-section schematic diagram of valve plate of the present invention.
Fig. 6 is the polygonal cross-section schematic diagram of valve plate of the present invention.
Embodiment
Refer to shown in Fig. 1, coal powder distribation modulating valve of the present invention is formed primarily of valve plate 1, valve seat 4 and actuator 5, and wherein, valve plate 1 is rotating to be arranged on valve seat 4, and actuator 5 drives valve plate 1 to rotate.
Shown in Fig. 2, Fig. 3, valve plate 1 of the present invention can rotate within the scope of 0-180 degree: when being in level when valve body 1, namely be parallel to coal powder cyclone direction, minimum to the leading role of separator eddy flow, the coal dust amount entering corresponding powder feeding pipes is also less; When valve plate 1 is in plumbness, namely perpendicular to coal powder cyclone direction, maximum to the leading role of separator eddy flow, the coal dust amount entering corresponding powder feeding pipes also will obviously increase.Drive valve plate 1 to rotate in direction from 180 degree to 0 degree by actuator 5, the guide functions consecutive variations of its correspondence, thus achieve the adjustment to pipeline dynamic field.
Further specifically, actuator 5 of the present invention can adopt the various actuators such as manual, pneumatic, electronic, also can be equipped with to meet various duty requirements, carries out action according to instruction that is artificial or control system.Actuator 5 can drive valve plate 1 to rotate as illustrated by valve shaft 2, and valve shaft 2 both can the mode that is embedded in valve plate 1 of one end be fixedly connected with valve plate 1, also one-body molded with valve plate 1.Also sealing system 3 can be set, preferred self-compensation type redundant seal structure at valve shaft 2 and the joint of valve seat 4 and the outside of valve seat 4, to keep airtight under the environment ensureing Long-term Vibration, thus prevent wind powder in primary air piping by gap leakage to outside pipeline.
And valve plate 1 of the present invention adopts wear-resistant steel material to make to strengthen wear-resisting property, extend its working life usually, and be preferably flat as shown in the figure.Its shaft section can adopt water-drop-shaped or the airfoil of bullet-headed, front round metacone, thus can be subject to less resistance to reduce wearing and tearing in wind powder flow process.Its cross section can adopt the shapes such as the ellipse shown in Fig. 4, Fig. 5, rectangle, or as shown in Figure 6, the symmetric polygonal that the axis place that employing and valve shaft 2 match is thicker.
Within the maximum obstruction area of valve plate 1 of the present invention is strict controlled in 50% of pulverized coal channel cross-section area, to be set to 30% ~ 50% of pulverized coal channel cross-section area for best, so that suitable obstruction area and good baffling characteristics all can be obtained under any angle state, thus greatly improve Security.
Modulating valve of the present invention can be arranged on powder feeding pipes or separator for coal mill, or as the part of powder feeding pipes, separator.When being applied on powder feeding pipes, be usually arranged on the powder entering end of powder feeding pipes, and be arranged on the sidewall of powder feeding pipes by its valve seat 4, valve plate 1 is extended in powder feeding pipes and the axes normal of section powder feeding pipes therewith, actuator is then positioned at outside powder feeding pipes.When being applied on separator, be generally the top circumference that several modulating valve are evenly distributed on separator, its valve seat 4 is arranged on the sidewall of separator equally, and valve plate 1 is extended in separator and with the axes normal of separator, actuator is then positioned at outside separator.
The above; it is only preferred embodiment of the present invention; not do any pro forma restriction to the present invention, those skilled in the art utilize the technology contents of above-mentioned announcement to make a little simple modification, equivalent variations or modification, all drop in protection scope of the present invention.
Claims (10)
1. a coal powder distribation modulating valve, is characterized in that comprising:
Valve seat;
The rotating valve plate be arranged on valve seat; And
Drive the actuator that valve plate rotates.
2. coal powder distribation modulating valve according to claim 1, is characterized in that the area of described valve plate is 30% ~ 50% of pulverized coal channel cross-section area.
3. coal powder distribation modulating valve according to claim 1, is characterized in that described actuator drives valve plate to rotate by valve shaft.
4. coal powder distribation modulating valve according to claim 3, is characterized in that described valve shaft one end is embedded in valve plate, or one-body molded with valve plate.
5. coal powder distribation modulating valve according to claim 3, is characterized in that described valve shaft and valve seat joint and/or valve seat arranged outside have self-compensation type redundant seal structure.
6. coal powder distribation modulating valve according to claim 1, is characterized in that described valve plate is flat, and its shaft section is water-drop-shaped or the airfoil of bullet-headed, front round metacone, and its cross section is the thicker symmetric polygonal in oval, rectangle or axis place.
7. coal powder distribation modulating valve according to claim 1, is characterized in that described valve plate is made up of wear-resistant steel material.
8. coal powder distribation modulating valve according to claim 1, is characterized in that described actuator is manual, pneumatic or electric actuator.
9. a powder feeding pipes, it is characterized in that, the powder entering end of described powder feeding pipes is provided with the coal powder distribation modulating valve according to any one of claim 1 ~ 8, the valve seat of described modulating valve is arranged on the sidewall of powder feeding pipes, described valve plate to extend in powder feeding pipes and the axes normal of section powder feeding pipes therewith, and described actuator is positioned at outside powder feeding pipes.
10. a separator, it is characterized in that, described separator is provided with the coal powder distribation modulating valve according to any one of several claims 1 ~ 8, the valve seat of described modulating valve is arranged on the sidewall of separator, described valve plate to extend in separator and with the axes normal of separator, described actuator is positioned at outside separator.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510498765.7A CN105003665A (en) | 2015-08-14 | 2015-08-14 | Regulating valve for pulverized coal distribution as well as pulverized coal feed pipe and separator applying regulating valves |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510498765.7A CN105003665A (en) | 2015-08-14 | 2015-08-14 | Regulating valve for pulverized coal distribution as well as pulverized coal feed pipe and separator applying regulating valves |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105003665A true CN105003665A (en) | 2015-10-28 |
Family
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510498765.7A Pending CN105003665A (en) | 2015-08-14 | 2015-08-14 | Regulating valve for pulverized coal distribution as well as pulverized coal feed pipe and separator applying regulating valves |
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| CN (1) | CN105003665A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105251602A (en) * | 2015-11-06 | 2016-01-20 | 浙江宜清环境技术有限公司 | Pulverized coal concentration adjusting valve for coal mill of coal pulverizing system |
| CN107906556A (en) * | 2017-11-07 | 2018-04-13 | 南京科远自动化集团股份有限公司 | A kind of fine coal distributor balance control method and equalising control device |
| 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 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105251602A (en) * | 2015-11-06 | 2016-01-20 | 浙江宜清环境技术有限公司 | Pulverized coal concentration adjusting valve for coal mill of coal pulverizing system |
| CN107906556A (en) * | 2017-11-07 | 2018-04-13 | 南京科远自动化集团股份有限公司 | A kind of fine coal distributor balance control method and equalising control device |
| CN107906556B (en) * | 2017-11-07 | 2019-04-05 | 南京科远自动化集团股份有限公司 | A kind of fine coal distributor balance control method and equalising control device |
| 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 |
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| C06 | Publication | ||
| PB01 | Publication | ||
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Application publication date: 20151028 |