CN114084590A - Power plant boiler dragveyer - Google Patents
Power plant boiler dragveyer Download PDFInfo
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- CN114084590A CN114084590A CN202111374796.3A CN202111374796A CN114084590A CN 114084590 A CN114084590 A CN 114084590A CN 202111374796 A CN202111374796 A CN 202111374796A CN 114084590 A CN114084590 A CN 114084590A
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- plant boiler
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- 239000002893 slag Substances 0.000 claims abstract description 116
- 230000001105 regulatory effect Effects 0.000 claims abstract description 25
- 238000007790 scraping Methods 0.000 claims abstract description 10
- 239000000463 material Substances 0.000 claims abstract description 9
- 238000003825 pressing Methods 0.000 claims abstract description 7
- 230000007246 mechanism Effects 0.000 claims description 8
- 238000005520 cutting process Methods 0.000 claims description 7
- 239000013049 sediment Substances 0.000 claims description 5
- 239000000203 mixture Substances 0.000 claims 1
- 239000002994 raw material Substances 0.000 claims 1
- 230000008901 benefit Effects 0.000 abstract description 5
- 230000007547 defect Effects 0.000 abstract description 3
- 238000000034 method Methods 0.000 description 15
- 230000008569 process Effects 0.000 description 13
- 239000003921 oil Substances 0.000 description 11
- 230000008859 change Effects 0.000 description 7
- 230000004048 modification Effects 0.000 description 7
- 238000012986 modification Methods 0.000 description 7
- 238000004519 manufacturing process Methods 0.000 description 6
- 230000009466 transformation Effects 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 238000013461 design Methods 0.000 description 3
- 230000009191 jumping Effects 0.000 description 3
- 230000001960 triggered effect Effects 0.000 description 3
- 238000005299 abrasion Methods 0.000 description 2
- 238000007664 blowing Methods 0.000 description 2
- 239000003638 chemical reducing agent Substances 0.000 description 2
- 238000002485 combustion reaction Methods 0.000 description 2
- 230000008602 contraction Effects 0.000 description 2
- 238000012937 correction Methods 0.000 description 2
- 230000003247 decreasing effect Effects 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 239000000428 dust Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000004071 soot Substances 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 239000010884 boiler slag Substances 0.000 description 1
- 239000003086 colorant Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 239000010727 cylinder oil Substances 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 239000000295 fuel oil Substances 0.000 description 1
- 238000007654 immersion Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 238000012552 review Methods 0.000 description 1
- 239000000779 smoke Substances 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
- B65G19/00—Conveyors comprising an impeller or a series of impellers carried by an endless traction element and arranged to move articles or materials over a supporting surface or underlying material, e.g. endless scraper conveyors
- B65G19/18—Details
- B65G19/20—Traction chains, ropes, or cables
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
- B65G19/00—Conveyors comprising an impeller or a series of impellers carried by an endless traction element and arranged to move articles or materials over a supporting surface or underlying material, e.g. endless scraper conveyors
- B65G19/18—Details
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
- B65G19/00—Conveyors comprising an impeller or a series of impellers carried by an endless traction element and arranged to move articles or materials over a supporting surface or underlying material, e.g. endless scraper conveyors
- B65G19/18—Details
- B65G19/22—Impellers, e.g. push-plates, scrapers; Guiding means therefor
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
- B65G23/00—Driving gear for endless conveyors; Belt- or chain-tensioning arrangements
- B65G23/24—Gearing between driving motor and belt- or chain-engaging elements
- B65G23/30—Variable-speed gearing
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Control Of Conveyors (AREA)
Abstract
The invention discloses a slag dragging machine of a power plant boiler, which comprises a slag dragging body, a machine head, a machine tail and a guide pressing wheel, wherein the machine head is arranged on one side of the machine tail; the adjusting unit comprises chains and scraping plates, the chains are supported by the guide pressing wheel, and a plurality of scraping plates for scraping materials are uniformly connected between the two chains; and the control unit comprises a speed regulating module and a control module, and the speed regulating module and the control module are arranged on one side of the slag dragging body. Has the advantages that: the length of the chains at two sides can be changed by hydraulic equipment, automatic deviation rectification adjustment of the chain scraper can be realized, time-saving and labor-saving deviation rectification efficiency is greatly improved, and meanwhile, the slag dragging machine can stably operate, and the smoothness of slag discharge of the boiler is realized. Meanwhile, the invention can also realize that the rotating speed of the slag conveyor can be adjusted along with the amount of slag, thereby solving the defects of lag in manual speed regulation and low accuracy.
Description
Technical Field
The invention relates to the technical field of slag conveyor equipment of power plants, in particular to a slag conveyor of a power plant boiler.
Background
At present, high-capacity and high-parameter thermal power generation units are mainstream units of coal-fired units, and the requirements on the operation stability and reliability of the units are higher and higher. The coal-fired unit dragveyer is the only passageway of unit sediment, and scraper blade dragveyer often causes the scraper blade skew because of reasons such as the inconsistent, the chain wearing and tearing of both sides chain elasticity, sediment volume are big in the operation process, and the skew can cause the scraper blade to block to a certain extent to break the chain. The load limitation and even fire extinguishing of the unit caused by the failure of the slag conveyor frequently occur in production, and influence on the stable operation of the production, so if the deviation of the scraper of the slag conveyor can be found in time and processed as early as possible, the accident caused by the breakage of the chain is very important to avoid.
In order to solve the problems, the conventional slag conveyor which runs is stopped, chain links on a chain corresponding to a deflected scraper blade are detached, and the deviation correction is realized by adjusting after detachment, so that time and labor are wasted, and the normal running of slag discharge of a boiler is influenced. Meanwhile, the rotating speed and the current of the slag conveyor are not displayed on the existing DCS, the rotating speed of the slag conveyor needs to be manually adjusted by operators on site according to the size of slag, and the problems of adjustment lag and poor accuracy exist.
Disclosure of Invention
This section is for the purpose of summarizing some aspects of embodiments of the invention and to briefly introduce some preferred embodiments. In this section, as well as in the abstract and the title of the invention of this application, simplifications or omissions may be made to avoid obscuring the purpose of the section, the abstract and the title, and such simplifications or omissions are not intended to limit the scope of the invention.
The invention is provided in view of the problems of the prior slag dragging machine for the power plant boiler.
Therefore, the invention aims to provide the slag conveyor for the power plant boiler, which can realize automatic deviation rectification adjustment of the chain scraper, greatly improve the time-saving and labor-saving deviation rectification efficiency, simultaneously ensure the stable operation of the slag conveyor and realize the smoothness of slag discharge of the boiler.
In order to solve the technical problems, the invention provides the following technical scheme: the slag dragging machine for the power plant boiler comprises a slag dragging body, a slag dragging device and a control device, wherein the slag dragging body comprises a machine head, a machine tail and a guide pressing wheel; the scraper unit comprises chains and scrapers, the chains are supported by the guide pinch roller, and the scrapers for scraping materials are uniformly connected between the chains; and the adjusting unit comprises a speed adjusting module and a control module, and the speed adjusting module and the control module are arranged on one side of the slag dragging body.
As a preferable scheme of the slag dragging machine for the power plant boiler of the invention, wherein: the aircraft nose department is provided with the motor and drives the drive roller and drive the chain and rotate, the tail both sides are provided with the support regulating wheel, the chain rotates and drives the scraper blade and scrape the sediment body, support regulating wheel one side and set up the slide mechanism part.
As a preferable scheme of the slag dragging machine for the power plant boiler of the invention, wherein: the sliding mechanism part comprises a sliding rail and a sliding block arranged inside the sliding rail, and a supporting regulating wheel is arranged on the inner side of the sliding block.
As a preferable scheme of the slag dragging machine for the power plant boiler of the invention, wherein: the supporting adjusting wheel is characterized in that a top plate is arranged on the upper side of the supporting adjusting wheel, a hydraulic cylinder is fixed on the lower side of the top plate, a piston rod is arranged in the hydraulic cylinder, and the piston rod is fixedly connected with the sliding block.
As a preferable scheme of the slag conveyor for the power plant boiler of the present invention, wherein: the oil pump that the tail upside set up, the oil pump is connected with the pneumatic cylinder oil circuit, some installing ports are seted up to tail department, the setting is provided with the mounting bracket in installing port one side, and the mounting bracket both sides are fixed with contact switch, and two contact switch symmetries set up at the scraper blade both ends.
As a preferable scheme of the slag dragging machine for the power plant boiler of the invention, wherein: and a PLC control box is arranged on one side of the oil pump.
As a preferable scheme of the slag conveyor for the power plant boiler of the present invention, wherein: one side of the PLC control box is electrically connected with a speed regulation module and a control module, and the control module comprises an electric control device and a thermal control device which are connected with an on-site/remote operation function at one end of the slag dragging body. .
As a preferable scheme of the slag dragging machine for the power plant boiler of the invention, wherein: the speed regulation module comprises an automatic cutting module and a speed regulation module, and an automatic cutter and a voice alarm are arranged on one side of the automatic cutting module.
As a preferable scheme of the slag dragging machine for the power plant boiler of the invention, wherein: the speed regulating module is arranged on a motor inside the slag dragging body.
The invention has the beneficial effects that: the length of the chains on the two sides can be changed through the hydraulic equipment, automatic deviation rectification adjustment of the chain scraper can be realized, time-saving and labor-saving deviation rectification efficiency is greatly improved, stable operation of the slag conveyor is facilitated, and smoothness of slag discharge of the boiler is realized. Meanwhile, the speed regulation module can be arranged to change the corresponding relation between the current and the rotating speed of the slag conveyor in the operation process, so that automatic speed change adjustment is realized, and the defects of lag in manual speed regulation and low accuracy are overcome.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without inventive exercise. Wherein:
fig. 1 is a schematic view of the overall structure of the slag conveyor of the power plant boiler of the invention.
Fig. 2 is a schematic view of a tail structure of the slag conveyor of the power plant boiler of the present invention.
Fig. 3 is a partial structural schematic diagram of the slag conveyor of the power plant boiler of the invention.
Fig. 4 is a schematic view of a partial structure of a hydraulic cylinder of the slag conveyor for power plant boilers of the present invention.
Fig. 5 is a schematic diagram of scraper adjustment of the slag conveyor for power plant boilers of the present invention.
Fig. 6 is a flow chart of an adjusting unit of the slag conveyor for the power plant boiler of the invention.
Fig. 7 is a graph of the adjustment of the rotating speed of the slag conveyor with current for the slag conveyor of the power plant boiler of the present invention.
Fig. 8 is a curve diagram of the speed and current correspondence of the slag conveyor of the power plant boiler slag conveyor of the invention.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, but the present invention may be practiced in other ways than those specifically described and will be readily apparent to those of ordinary skill in the art without departing from the spirit of the present invention, and therefore the present invention is not limited to the specific embodiments disclosed below.
Furthermore, reference herein to "one embodiment" or "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one implementation of the invention. The appearances of the phrase "in one embodiment" in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments.
Furthermore, the present invention is described in detail with reference to the drawings, and in the detailed description of the embodiments of the present invention, the cross-sectional view illustrating the structure of the device is not enlarged partially according to the general scale for convenience of illustration, and the drawings are only exemplary and should not be construed as limiting the scope of the present invention. In addition, the three-dimensional dimensions of length, width and depth should be included in the actual fabrication.
Example 1
Referring to fig. 1-6, the overall structure of a slag conveyor for a power plant boiler is schematically shown, and as shown in fig. 1, the slag conveyor for the power plant boiler comprises a slag conveyor body 100, which comprises a machine head 101, a machine tail 102 and a guide pinch roller 103, wherein the machine head 101 is arranged on one side of the machine tail 102, and the guide pinch roller 103 is arranged on the lower side of the slag conveyor body 100; the scraper unit 200 comprises chains 201 and scrapers 202, the chains 201 are supported by the guide pinch rollers 103, and the scrapers 202 for scraping materials are uniformly connected between the chains 201; the adjusting unit 300 comprises a speed regulating module 301 and a control module 302, wherein the speed regulating module 301 and the control module 302 are arranged on one side of the slag dragging body 100.
Specifically, the slag salvaging body 100 comprises a machine head 101, a machine tail 102 and a guide pressing wheel 103, wherein the machine head 101 is arranged on one side of the machine tail 102, and the guide pressing wheel 103 is arranged on the lower side of the slag salvaging body 100; the adjusting unit 200 comprises chains 201 and scrapers 202, wherein the chains 201 are supported by the guide pinch roller 103, and a plurality of scrapers 202 for scraping materials are uniformly connected between the two chains 201. In the production process, the slag conveyor of the coal-fired unit is the only channel for slag discharge of the unit, and in the operation process of the slag conveyor body 100, the scraping plates 202 are deflected due to inconsistent expansion and contraction degrees of the chains 201 on the two sides, abrasion of the chains 201 and large slag amount, and the scraping plates 202 are clamped due to deflection to a certain degree, so that the chains 201 are broken. Through realizing the regulation of rectifying automatically to chain 201 and scraper blade 200, labour saving and time saving rectifies efficiency and obtains very big promotion, makes the dragveyer carry out stable operation simultaneously, realizes the smooth and easy nature of boiler row sediment. The length of the chains 201 at two sides is changed by hydraulic equipment, so that the normal operation of the slag dragging body 100 is ensured
Further, the adjusting unit 300 comprises a speed regulating module 301 and a control module 302, and the speed regulating module 301 and the control module 302 are arranged on one side of the slag dragging body 100. The speed regulation module 301 realizes automatic speed change regulation according to the corresponding relation between the current and the rotating speed of the slag conveyor in operation. The speed regulation module 301 is divided into 6 modules, and the 6 modules are composed of corresponding current intervals and rotating speed intervals. In the automatic speed change adjustment process, the control module 302 limits the speed of the slag conveyor so that the rotating speed is increased or decreased within a set rotating speed interval of 1.7-3.0. When the deviation between the operating rotating speed of the slag conveyor and the set current interval is more than 0.3 m/min, the slag conveyor is automatically cut off, the jumping is manual, and a voice alarm is triggered.
The operation process is as follows: in the running process of a slag conveyor of a coal-fired unit, chains 201 on two sides in a slag conveyor body 100 are stressed with different degrees of expansion and contraction, and are abraded and the slag amount is large, so that a scraper 202 deflects, and the scraper 202 is clamped by the deflection to a certain degree, so that the chains 201 are broken. The length of the chains 201 on two sides is changed by the hydraulic equipment on one side of the tail 102, so that the scraper 202 is balanced, and the normal operation of the slag fishing body 100 is ensured. The speed regulating module 301 enables the rotation speed of the slag dragging body 100 to operate in a set rotation speed interval of 1.7-3.0. When the deviation between the running rotating speed of the slag conveyor body 100 and the set current interval is greater than 0.3 m/min, the slag is automatically cut off, the jumping is manual, and a voice alarm is triggered.
Example 2
Referring to fig. 1 to 5, this embodiment is different from the first embodiment in that: the machine head 101 is provided with a motor 101a to drive a driving roller to drive a chain 201 to rotate, two sides of the machine tail 102 are provided with supporting adjusting wheels 203, the chain 201 rotates to drive a scraper 202 to scrape the slag dragging body 100, and one side of the supporting adjusting wheels 203 is provided with a sliding mechanism part 204. The sliding mechanism component 204 includes a sliding rail 205 and a slider 206 disposed inside the sliding rail 205, and the inside of the slider 206 is mounted with a support adjustment wheel 203.
A top plate 207 is arranged on the upper side of the supporting and adjusting wheel 203, a hydraulic cylinder 208 is fixed on the lower side of the top plate 207, a piston rod 209 is arranged in the hydraulic cylinder 208, and the piston rod 209 is fixedly connected with the sliding block 206. Oil pump 104 that the tail 102 upside set up, oil pump 104 and pneumatic cylinder 208 oil circuit are connected, and the tail 102 department sets up some installing ports 105, sets up and is provided with mounting bracket 106 in installing ports 105 one side, and mounting bracket 106 both sides are fixed with contact switch 107, and two contact switch 107 symmetries set up at scraper blade 203 both ends. The oil pump 104 is provided with a PLC control box 108 on one side.
Specifically, set up two chains 201 that support through direction pinch roller 103 in dragveyer body 100, evenly be connected with many scrapers 202 that are used for scraping the material between two chains 201, aircraft nose 101 department is provided with motor 308, drives the drive roller and drives chain 201 and rotate, and aircraft tail 102 department both sides are provided with the support regulating wheel 203, and chain 201 rotates and drives scraper 202 and scrape the material along aircraft nose 101 to dragveyer body 100 bottom sedimentary impurity and scrape out, accomplishes and scrapes the material process.
Further, in order to realize the deviation correction of the chain 201 and the scraper 202, the machine tail 102 is fixed, the adjusting and supporting adjusting wheel 203 is provided with an up-and-down sliding mechanism 204, the sliding mechanism 204 comprises a sliding block 206 arranged in a sliding rail 205 and the sliding rail 205, the adjusting wheel 203 is mounted and supported on the inner side of the sliding block 206, a piston rod 209 of a hydraulic cylinder 208 fixed on a top plate 207 is fixedly connected with the sliding block 206, an oil pump 104 arranged on the machine tail 102 is connected with an oil circuit of the hydraulic cylinder 208, meanwhile, contact switches 107 are fixed on two sides of a mounting frame 106 of a mounting opening 105 formed in the machine tail 102, and the two contact switches 107 are symmetrically arranged at two ends of the scraper 202.
The rest of the structure was the same as in example 1.
The operation process is as follows: when one side of the flight 202 on the chain 201 deflects, the deflected end of the flight 202 will first encounter the corresponding contact switch 107, while the other non-deflected end will delay spraying into the other corresponding contact switch 107. The two contact switches 107 transmit signals with time difference to the PLC control box 108, the signals received by the PLC control box 108 are not at the same time, the PLC control box 108 controls the oil pump 104 to start the hydraulic cylinder 208 corresponding to the inclined end (the side of the contact switch 107 for transmitting the signals later), the hydraulic cylinder 208 at the inclined end pulls up the slide block 206, and thus the corresponding chain 201 is tightened, and the adjustment of the scraper blade 203 is realized.
Example 3
Referring to fig. 6-8, this embodiment differs from the above embodiments in that: one side of the PLC control box 108 is electrically connected with a speed regulating module 301 and a control module 302, and the control module 302 comprises an electric and thermal control device which is connected with one end of the slag dragging body 100 and has an on-site/remote operation function. The speed regulation module 301 comprises an automatic cutting module 303 and a speed regulation module 304, and an automatic cutter 305 and a voice alarm 306 are arranged on one side of the automatic cutting module 303. The speed regulating module 304 is arranged on the motor 101a inside the slag dragging body 100.
Specifically, in this embodiment, a slag removal system of a #4 furnace of a power plant is provided with a slag conveyor 100 and a slag bin, and bottom slag of the boiler is directly conveyed to the slag bin by the slag conveyor and then is transported outside. The used slag conveyor is a water immersion type lower return chain transmission type slag conveyor, a motor 101a is driven by a variable frequency motor and a speed reducer in a combined double-side mode, the rated current is 2 multiplied by 24.6A, the normal speed is 0.7-3 m/min, the maximum speed is set to be 3m/min, the maximum conveying capacity is 40t/h, and the maximum set pressure of the system is 100 bar. The #4 furnace appears three times of slag conveyor jamming in a certain year. In order to reduce the number of faults of the slag conveyor as much as possible and ensure the safe, stable and economic operation of the unit, an automatic speed regulating function, namely a speed regulating module 301, of the slag conveyor is added to the #4 furnace, a flow diagram of an automatic control method of the rotating speed of the slag conveyor is shown in fig. 6, the rotating speed control and the current display value of the slag conveyor are accessed to a DCS picture of a dust removing system of a control centralized control room of an auxiliary machine, and meanwhile, the control module 302 realizes two operation functions of 'local/remote' of all electric and thermal control equipment, and the operation functions can remotely control the stopping and starting of the slag conveyor body 100 and are accessed to the DCS picture of the dust removing system. The speed adjusting module 304 realizes automatic speed change adjustment according to the corresponding relationship between the current and the rotating speed of the slag conveyor in operation, and the specific functional relationship is shown in table 1.
TABLE 1 dragveyer variable speed adjustment function relationship
In order to avoid the influence on the service life of the frequency converter caused by too frequent rotation speed adjustment due to current fluctuation, the speed limiting function is added, and the rotation speed is adjusted in an increasing and decreasing mode in a set interval. The adjustment curve is shown in fig. 7. For avoiding the automatic function failure to influence the safe operation of dragveyer, increased automatic excision protect function, promptly: when the deviation between the running rotating speed and the set current interval is greater than 0.3 m/min, the automatic exciser 305 automatically excises and jumps to manual operation, and triggers the voice alarm 306. In order to avoid chain breakage or speed reducer damage caused by automatic speed increasing of the slag conveyor under the condition of mechanical jamming, a speed protection function is added in the automatic speed adjusting process of the speed adjusting module 304. And table 2 shows the current variation trend of the normal starting process of the slag conveyor before modification.
TABLE 2 Current Change trend in Normal Start-Up of A submerged slag conveyor before transformation
It can be seen from table 2 that the current rises at a rate of 2.6-2.8A/s during normal start-up of the dragger, so that the rate protection needs to avoid this interval. And table 3 shows the current variation trend in the starting process under the condition of copying the card of the slag conveyor before modification.
TABLE 3 tendency of current change in starting process before transformation of dragveyer
From table 3 it can be seen that the dragger current rise rate is at least 6.9A/s in the mechanical violation of the card, thus setting the rate protection to 5A/s, automatically cutting off when the rate exceeds 5A/s, jumping to manual, and triggering a voice alarm. When the current of the slag conveyor is increased and the rotating speed is bad, the rotating speed is automatically cut off and jumped into a manual function, and a voice alarm is triggered.
After the automatic control of the rotating speed of the slag conveyor is improved, a corresponding curve chart of the rotating speed and the current is shown in fig. 8. After the transformation, the automatic speed regulation function is stable and reliable, and the frequency converter can be automatically regulated according to the slag quantity.
The rest of the structure was the same as in example 2.
Through transformation, the failure rate of the slag conveyor is greatly reduced, and the following effects are achieved:
when the slag conveyor is processed after the fault, the hydraulic shutdown door at the bottom of the furnace needs to be closed. If the hydraulic shutoff valve is closed and air leakage is avoided, the conditions of unstable combustion and flickering fire detection can occur. Meanwhile, in order to prevent a large amount of slag from falling during the treatment of the slag conveyor, soot blowing is forbidden at the moment of the boiler, the boiler is coked due to the fact that soot blowing is not carried out for a long time, and the steam temperature, the wall temperature and the smoke exhaust temperature are increased and even exceed the limit. Through transformation, the fault rate of the slag conveyor is reduced, and the safe and stable operation of the boiler is improved.
The rotating speed of the slag conveyor is adjusted along with the amount of slag, and the slag conveyor is kept to operate under an economic working condition, so that electric energy is saved, and the abrasion to equipment is reduced. Meanwhile, as the oil is required to be put into the slag conveyor for stable combustion when the defects of the slag conveyor are treated, the use of fuel oil is saved after the improvement, the energy-saving effect is achieved, and the economic benefit is improved.
The length of the chains on two sides can be changed through hydraulic equipment, automatic deviation rectifying adjustment of the chain scraper can be achieved, time-saving and labor-saving deviation rectifying efficiency is greatly improved, the slag dragging machine is enabled to stably operate, and the smoothness of slag discharging of the boiler is achieved.
It is important to note that the construction and arrangement of the present application as shown in the various exemplary embodiments is illustrative only. Although only a few embodiments have been described in detail in this disclosure, those skilled in the art who review this disclosure will readily appreciate that many modifications are possible (e.g., variations in sizes, dimensions, structures, shapes and proportions of the various elements, values of parameters (e.g., temperatures, pressures, etc.), mounting arrangements, use of materials, colors, orientations, etc.) without materially departing from the novel teachings and advantages of the subject matter recited in this application. For example, elements shown as integrally formed may be constructed of multiple parts or elements, the position of elements may be reversed or otherwise varied, and the nature or number of discrete elements or positions may be altered or varied. Accordingly, all such modifications are intended to be included within the scope of this invention. The order or sequence of any process or method steps may be varied or re-sequenced according to alternative embodiments. In the claims, any means-plus-function clause is intended to cover the structures described herein as performing the recited function and not only structural equivalents but also equivalent structures. Other substitutions, modifications, changes and omissions may be made in the design, operating conditions and arrangement of the exemplary embodiments without departing from the scope of the present inventions. Therefore, the present invention is not limited to a particular embodiment, but extends to various modifications that nevertheless fall within the scope of the appended claims.
Moreover, in an effort to provide a concise description of the exemplary embodiments, all features of an actual implementation may not be described (i.e., those unrelated to the presently contemplated best mode of carrying out the invention, or those unrelated to enabling the invention).
It should be appreciated that in the development of any such actual implementation, as in any engineering or design project, numerous implementation-specific decisions may be made. Such a development effort might be complex and time consuming, but would nevertheless be a routine undertaking of design, fabrication, and manufacture for those of ordinary skill having the benefit of this disclosure, without undue experimentation.
It should be noted that the above-mentioned embodiments are only for illustrating the technical solutions of the present invention and not for limiting, and although the present invention is described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, which should be covered by the claims of the present invention.
Claims (9)
1. The utility model provides a power boiler dragveyer which characterized in that: comprises the steps of (a) preparing a mixture of a plurality of raw materials,
the slag fishing device comprises a slag fishing body (100) and a slag fishing device, wherein the slag fishing body comprises a machine head (101), a machine tail (102) and a guide pressing wheel (103), the machine head (101) is arranged on one side of the machine tail (102), and the guide pressing wheel (103) is arranged on the lower side of the slag fishing body (100);
the scraper unit (200) comprises chains (201) and scrapers (202), the chains (201) are supported by the guide pinch rollers (103), and the scrapers (202) for scraping materials are uniformly connected between the chains (201); and the number of the first and second groups,
the adjusting unit (300) comprises a speed regulating module (301) and a control module (302), wherein the speed regulating module (301) and the control module (302) are arranged on one side of the slag dragging body (100).
2. The power plant boiler dragveyer of claim 1, characterized by: the inside motor (101a) that is provided with of aircraft nose (101), motor (101a) drive roller drives chain (201) and rotates, tail (102) both sides are provided with support regulating wheel (203), chain (201) rotate and drive scraper blade (202) and scrape sediment body (100)), support regulating wheel (203) one side and be provided with slide mechanism part (204).
3. The power plant boiler dragveyer of claim 2, characterized by: the sliding mechanism component (204) comprises a sliding rail (205) and a sliding block (206) arranged inside the sliding rail (205), and the inner side of the sliding block (206) is provided with a supporting regulating wheel (203).
4. The power plant boiler dragveyer of claim 3, characterized by: the support regulating wheel (203) upside is provided with roof (207), roof (207) downside is fixed with pneumatic cylinder (208), pneumatic cylinder (208) inside is provided with piston rod (209), piston rod (209) and slider (206) fixed connection.
5. The power plant boiler dragveyer of claim 4, characterized by: oil pump (104) that tail (102) upside set up, oil pump (104) and pneumatic cylinder (208) oil circuit connection, installing port (105) that have are seted up in tail (10) department, the setting is provided with mounting bracket (106) in installing port (105) one side, and mounting bracket (106) both sides are fixed with contact switch (107), and two contact switch (107) symmetry sets up at scraper blade (203) both ends.
6. The power plant boiler dragveyer of claim 5, characterized by: and a PLC control box (108) is arranged on one side of the oil pump (104).
7. The power plant boiler dragveyer of claim 6, characterized by: one side of the PLC control box (108) is electrically connected with a speed regulating module (301) and a control module (302), and the control module (302) comprises an electric and thermal control device which is connected with an on-site/remote operation function at one end of the slag fishing body (100).
8. The power plant boiler dragveyer of claim 1 or 7, characterized by: the speed regulation module (301) comprises an automatic cutting module (303) and a speed regulation module (304), wherein an automatic cutter (305) and a voice alarm (306) are arranged on one side of the automatic cutting module (303).
9. The power plant boiler dragveyer of claim 8, characterized by: the speed regulating module (304) is arranged on a motor (101a) inside the slag dragging body (100).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111374796.3A CN114084590A (en) | 2021-11-18 | 2021-11-18 | Power plant boiler dragveyer |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202111374796.3A CN114084590A (en) | 2021-11-18 | 2021-11-18 | Power plant boiler dragveyer |
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| CN114084590A true CN114084590A (en) | 2022-02-25 |
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