CN114988123B - Pneumatic ash conveying system and method with dense-phase ash grooves difficult to abrade - Google Patents
Pneumatic ash conveying system and method with dense-phase ash grooves difficult to abrade Download PDFInfo
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- CN114988123B CN114988123B CN202210848164.4A CN202210848164A CN114988123B CN 114988123 B CN114988123 B CN 114988123B CN 202210848164 A CN202210848164 A CN 202210848164A CN 114988123 B CN114988123 B CN 114988123B
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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
- B65G53/00—Conveying materials in bulk through troughs, pipes or tubes by floating the materials or by flow of gas, liquid or foam
- B65G53/34—Details
- B65G53/66—Use of indicator or control devices, e.g. for controlling gas pressure, for controlling proportions of material and gas, for indicating or preventing jamming of material
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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
- B65G53/00—Conveying materials in bulk through troughs, pipes or tubes by floating the materials or by flow of gas, liquid or foam
- B65G53/34—Details
- B65G53/52—Adaptations of pipes or tubes
- B65G53/523—Wear protection
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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
- B65G53/00—Conveying materials in bulk through troughs, pipes or tubes by floating the materials or by flow of gas, liquid or foam
- B65G53/34—Details
- B65G53/52—Adaptations of pipes or tubes
- B65G53/54—Flexible pipes or tubes
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
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- Y02A50/2351—Atmospheric particulate matter [PM], e.g. carbon smoke microparticles, smog, aerosol particles, dust
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
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Abstract
The invention discloses a pneumatic ash conveying system and method with dense-phase ash grooves which are difficult to abrade, wherein the pneumatic ash conveying system comprises a plurality of ash groove collecting devices connected in parallel, and an ash conveying pipeline which is used for enabling the input ends of the ash groove collecting devices to be communicated with a pneumatic supply device and the output ends of the ash groove collecting devices to be communicated with a total collecting device, wherein electromagnetic valves, pressure sensors and ultrasonic monitoring sensors are arranged on the input ends of the ash groove collecting devices, and the electromagnetic valves, the pressure sensors and the ultrasonic monitoring sensors are in wireless communication connection with a remote central control singlechip. The dust is conveyed in a non-contact mode, so that the phenomenon that particles in the dust move at a high speed to abrade the inner wall of the dust conveying pipeline made of metal materials is avoided, and the service life of a dust conveying system is prolonged; meanwhile, the pneumatic supply device is remotely controlled by the singlechip to provide the pressure and the air quantity of the air and control the quality of the ash falling into the ash conveying bin, so that the ash particles in the ash conveying bin are in a concentrated phase conveying state, and the abrasion caused by blockage or excessively high speed at the turning part of the ash conveying pipeline is avoided.
Description
Technical Field
The invention relates to the technical field of ash conveying, in particular to a pneumatic ash conveying system and method with a dense-phase ash groove which is not easy to abrade.
Background
The pneumatic conveying system is widely applied to conveying of raw materials and powder materials of factories such as petroleum, chemical industry, metallurgy, building materials, grain and oil, pharmacy and the like. The pneumatic ash conveying system of the power plant covers the conveying of the economizer ash, the air preheater ash, the dust remover ash, the desulfurization ash and the denitration ash.
The ash tank is a container commonly used in pneumatic ash conveying systems, and the working principle of ash conveying in the ash tank is that the ash is conveyed in a pipeline at an average speed of 3-5M/S by controlling the pressure and the flow of feeding and compressed air. At this conveying speed, the fly ash does not need to be uniformly mixed with the compressed air, and the fly ash moves in a continuous plug shape along the finding conveying pipeline under the action of the compressed air. In order to meet the requirement of outdoor corrosion prevention, a large number of corrosion-resistant materials such as stainless steel are adopted for casting the ash conveying trough, and the manufacturing cost is high. In the prior art, chinese patent documents with publication numbers CN110217598B and CN103213844B respectively propose a method and a device for transporting and discharging ash of a pneumatic ash transporting system of a thermal power plant and a blast furnace gas dust removing device, by setting a height difference transportation mode, pipeline impact is reduced or transportation speed is controlled so as to reduce abrasion to the inner wall of an ash tank, but the abrasion to the inner wall of the ash tank during particulate matter transportation, especially the bending position on the ash tank, is not fundamentally solved, the abrasion degree suffered is larger, and operators are still required to replace bending pipelines regularly, so that the ash transporting efficiency is affected, and the ash transporting cost is increased.
Disclosure of Invention
Aiming at the defects of the prior art, the pneumatic ash conveying system and method with the dense-phase ash groove which is not easy to wear are provided, the advantages of reducing the abrasion of the ash groove and the like are achieved, meanwhile, various parameters of gas particles and ash particles provided for an ash conveying bin by a pressure sensor and an ultrasonic monitoring sensor real-time monitoring system are calculated by constructing a pneumatic ash conveying ash material movement critical speed and turning speed calculation model, a singlechip after reinforcement learning remotely controls a pneumatic supply device to provide the pressure and the air quantity of gas and control the quality of ash materials falling into the ash conveying bin, the ash particles in the ash conveying bin are in a dense-phase conveying state, abrasion caused by blockage or too high speed at a turning position of an ash conveying pipeline is avoided, and a series of problems that in the prior art, the wall of the ash conveying bin is easy to wear due to pneumatic ash conveying are solved.
In order to achieve the above purpose, the present invention provides the following technical solutions: the pneumatic ash conveying system with the dense-phase ash grooves difficult to wear comprises a plurality of ash groove collecting devices connected in parallel, an ash conveying pipeline which is used for communicating the input ends of the ash groove collecting devices with a pneumatic supply device and communicating the output ends of the ash groove collecting devices with the total collecting device, wherein the ash groove collecting devices comprise ash hoppers, power pumps, dome valves used for controlling whether ash in the ash hoppers falls into ash conveying bins, electromagnetic valves, pressure sensors and ultrasonic monitoring sensors which are arranged on the input ends of the ash groove collecting devices, the electromagnetic valves, the pressure sensors and the ultrasonic monitoring sensors on the pneumatic supply device and the ash groove collecting devices are connected with a remote central control singlechip in a wireless communication manner, the ash conveying pipeline comprises ash conveying bent pipes and ash groove pipes which are communicated, the two ends of each ash conveying bent pipe are connected through connecting pipes, each ash conveying bent pipe is made of deformable rubber, cylindrical rubber air bags used for conveying ash are sleeved in each ash conveying bent pipe, arc-shaped rubber air bags with the same inner diameter as that of each cylindrical rubber air bag are sleeved in each ash conveying bent pipe, an adjusting assembly used for changing the bending degree of each ash conveying bent pipe and each arc-shaped rubber air bag is further arranged on each ash conveying bent pipe, and each adjusting assembly comprises a plurality of snake bones arranged between each ash conveying bent pipe and each arc-shaped rubber air bag, and a variable-pitch sliding sleeve and a double-head screw rod used for adjusting the distance between two ends of each ash conveying bent pipe;
The connecting pipe at two ends is internally sleeved with a connecting rubber air bag with a changeable inner diameter, and two ends of a plurality of snake bones respectively penetrate through to the corresponding sides between the connecting rubber air bag and the connecting pipe.
Further, a plurality of cylindrical rubber air bags are provided with stop valves for filling or releasing gas, and a plurality of ash slot pipes are provided with through holes matched with the positions of the corresponding stop valves; the system also comprises a first limiting component, wherein the first limiting component comprises a first limiting rubber ring arranged on the cylindrical rubber air bag and a first limiting annular groove arranged on the ash groove pipe in a matched mode, the outer walls of the two ends of the cylindrical rubber air bag are fixedly sleeved with the first limiting rubber ring, the first limiting annular grooves are respectively arranged on the inner wall of the ash groove pipe in a corresponding mode and correspond to the positions of the first limiting rubber rings, and the first limiting rubber rings are respectively clamped in the corresponding limiting annular grooves.
Further, a plurality of uniformly distributed mounting rings are fixedly arranged on the inner wall of the ash conveying bent pipe, a plurality of snake bones are respectively sleeved in a plurality of mounting rings at corresponding positions, and two ends of the snake bones extend out of two sides of the ash conveying bent pipe respectively; the arc-shaped rubber air bags are consistent with the ash conveying bent pipes in length and can deform along with bending of a plurality of snake bones, and the inner diameters of the arc-shaped rubber air bags are equal to the inner diameters of the connecting rubber air bags;
The inner wall of the ash conveying elbow pipe is fixedly provided with a plurality of filling rubber blocks which are uniformly distributed, the length of each filling rubber block is equal to the length of the ash conveying elbow pipe, the thickness of each filling rubber block is consistent with the outer diameter of each snake bone, and the outer wall of each arc-shaped rubber air bag is in close contact with a plurality of filling rubber blocks and the outer wall of each snake bone.
Further, filling columns with the same length as the connecting pipes are sleeved between the connecting pipes at two ends and the connecting rubber air bags, a plurality of extending grooves which are uniformly distributed are formed in one end of each of the two filling columns, two ends of each of the plurality of snake bones are fixedly sleeved in the corresponding extending grooves respectively, and the ash groove pipes, the ash conveying bent pipes, the connecting pipes and the ash groove pipes at adjacent sections are connected through flange plates; the two filling columns are provided with second limiting annular grooves on the inner walls, the two connecting rubber air bags are fixedly sleeved with second limiting rubber rings which are matched with the corresponding second limiting annular grooves in position, and the two second limiting rubber rings are respectively clamped in the corresponding second limiting annular grooves.
Further, a plurality of uniformly distributed fixing rings are fixedly connected to the outer walls of the two ends of the ash conveying bent pipe, the same stressed metal ring is sleeved in the fixing rings on the same side, connecting rings are sleeved on the fixing rings with the same height, one ends of the two variable-pitch sliding sleeves are respectively connected to the connecting rings on the corresponding sides in a rotating mode, two ends of the double-head screw rod are respectively sleeved in the variable-pitch sliding sleeves on the corresponding sides in a threaded mode, and the two variable-pitch sliding sleeves are respectively matched with the corresponding ends of the double-head screw rod; the middle part of double-end screw rod is still fixed the cup joint operating nut, operating nut with both ends when the displacement sliding sleeve interval is the biggest, ash conveying return bend is located initial state and is sharp and arranges.
The invention also provides a pneumatic ash conveying method with the dense-phase ash groove which is not easy to wear, the method adopts the pneumatic ash conveying system with the dense-phase ash groove which is not easy to wear, and the method comprises the following steps:
s1, discharging: when the material level in the ash hopper of one ash chute collecting device of the system reaches the lowest discharge material level, the dome valve is opened, and the power pump pressurizes the falling of ash in the ash hopper and enters the ash conveying bin;
S2, conveying: the remote central control singlechip controls the pneumatic supply device to start, air is introduced into an ash conveying bin in the ash trough collecting device, the pressurizing pressure is regulated, the electromagnetic valve on the input end of the corresponding ash trough collecting device in the step S1 is started, and the corresponding pressure sensor monitors the pressure p of the input gas of the input end of the corresponding ash trough collecting device at the t moment in real time tg And the ultrasonic monitoring sensor monitors the gas moving speed v in the ash conveying bin at the t moment in real time tg The pneumatic supply device supplies the mass q of the added gas particles a The moving speed v of the ash particles in the ash conveying bin tm Mass q of ash particles m The pressure p to which the ash particles are subjected tm Constructing the critical speed v of pneumatic ash conveying and ash material movement a Calculation model and pneumatic ash conveying ash material moving turning speed v b Calculating a model to obtain the critical speed v of pneumatic ash conveying a And turning speed v b ；
S3, adjusting the pressurizing pressure of the pneumatic supply device and the mass of the ash hopper added into the ash conveying bin;
s4: judging real-time ash moving speed v in ash conveying bin of ash chute collecting device im Whether the following pneumatic ash conveying ash material moving speed threshold range is met: v b ＜v tm ＜v a ；
S5: if yes, judging that the ash in the ash chute collecting device is in a concentrated phase ash conveying state, discharging ash from the input end of the ash chute collecting device to the output end of the ash chute collecting device, otherwise, repeating the steps S1-S4 to enable the ash in an ash conveying bin in the ash chute collecting device to be in a concentrated phase ash conveying state;
s6: after the ash in the ash conveying bin is conveyed, the pressure of the ash conveying bin is reduced; when the pressure in the ash conveying bin reduces the lower limit pressure, the remote central control singlechip controls the pneumatic supply device and the corresponding electromagnetic valve to be closed, so that pneumatic ash conveying of the ash groove collecting device is completed.
Further, the pneumatic ash conveying ash material moving critical speed v constructed in the step S2 a The calculation model is as follows:
s.t.u a ＞0；
ρ a ＞0；
v tg ＞0；
v tm ＞0；
solving for v tm The critical speed v of the pneumatic ash conveying and moving is a ；
Wherein,,
the gas particles are supplied to the pneumatic supply device for full differentiation of all directions in a three-dimensional space by using a gradient operator; />
Is the gas moving speed v in the ash conveying bin at the t-th moment tg Is a vector of (2);
the moving speed v of the ash particles in the ash conveying bin at the t-th moment tm Is a vector of (2); u (u) a Supplying the pneumatic supply device with the volume ρ of the added gas particles a Supplying the pneumatic supply device with the density of the added gas particles; g is gravity acceleration; m is M tg The acting force coefficient of the gas and the ash particles in the ash conveying bin is set; t is the length of time for supplying air to the pneumatic supply device;
wherein q m For the quality of ash particles in an ash conveying bin, q a The pneumatic supply device is supplied with the mass of the added gas particles.
Further, the pneumatic ash conveying ash material constructed in the step S2 moves at turning speed v b The calculation model is as follows:
s.t.u m ＞0；
ρ m ＞0；
v tg ＞0；
v tm ＞0；
v tm，i ＞0；
v tm，i+1 ＞0；
solving for v tm，i Namely the moving turning speed v of the pneumatic ash conveying ash material b ；
Wherein,,
the gas particles are supplied to the pneumatic supply device for full differentiation of all directions in a three-dimensional space by using a gradient operator; />
Is the gas moving speed v in the ash conveying bin at the t-th moment tg Is a vector of (2); />
The moving speed v of the ash particles in the ash conveying bin at the t-th moment tm Is a vector of (2); u (u) a Supplying the pneumatic supply device with the volume ρ of the added gas particles a Supplying the pneumatic supply device with the density of the added gas particles; g is gravity acceleration; m is M tg The acting force coefficient of the gas and the ash particles in the ash conveying bin is set; m is M tm The acting force coefficient of the ith ash particle and the (i+1) th ash particle in the ash conveying bin is set; t is the length of time for supplying air to the pneumatic supply device; />
The movement speed v of the ith ash particle at the time t tm，i Vector of->
The movement speed v of the (i+1) th gray particles at the time t tm，i+1 I=1, 2, …, n; u (u) m For the volume ρ of the ash particles in the ash conveying bin m The density of the ash particles in the ash conveying bin is the density of the ash particles in the ash conveying bin;
wherein q m For the quality of ash particles in an ash conveying bin, q a The pneumatic supply device is supplied with the mass of the added gas particles.
Further, the ith ash particle and the (i+1) th ash particle in the ash conveying binCoefficient of force M of ash particles tm The calculation formula of (2) is as follows:
wherein, sigma is the recovery constant after collision friction between ash particles, sigma is E [0,1 ]]，d tm，i The diameter of the ith ash particle at the moment t, d tm，i+1 The diameter of the +1st ash particle at the time t is G i，i+1 Is the friction coefficient between the ith ash particle and the (i+1) th ash particle,
the movement speed v of the ith ash particle at the time t tm， Vector of i->
The movement velocity v of the (i+1) th gray particles at the moment t tm，i+1 Vector of->
And taking a differential mode.
Further, the acting force coefficient M of the gas and the ash particles in the ash conveying bin tg The calculation formula of (2) is as follows:
when u is a At a time of > 0.75 f,
when u is a When the temperature is less than or equal to 0.75 percent,
wherein C is a，m For the friction coefficient between the gas particles and the ash particles in the ash conveying bin,
for the movement velocity v of the gas particles at time t tg Vector of->
Velocity v of movement of the soot particles at time t tm Vector of->
Modeling the difference; d, d tm And the diameter of the ash particles in the ash conveying bin at the time t.
Compared with the prior art, the pneumatic ash conveying system and method provided by the invention have the advantages that the dense phase ash groove is not easy to abrade, and the pneumatic ash conveying system and method have the following beneficial effects:
1. according to the pneumatic ash conveying system and method with the dense-phase ash grooves difficult to abrade, air is injected into the cylindrical rubber air bags, the arc-shaped rubber air bags and the connecting rubber air bags through the corresponding stop valves, and due to the constraint effects of the plurality of snake bones, the connecting pipes and the ash groove pipes, the cylindrical rubber air bags, the arc-shaped rubber air bags and the connecting rubber air bags can only expand on the inner sides and reach the same inner diameter, so that the inner diameter of the ash conveying pipeline is correspondingly adjusted to adapt to the power requirement of the ash conveying system, meanwhile, the ash conveying pipeline made of traditional metal materials is replaced, dust is conveyed by adopting elastic rubber materials, the fact that particles in the dust move at high speed and abrade the inner wall of the ash conveying pipeline is avoided, natural loss of materials is reduced, and the service life of the whole ash conveying system is prolonged.
2. According to the pneumatic ash conveying system and method with the dense-phase ash grooves difficult to abrade, the first limiting annular groove and the second limiting annular groove are formed, the corresponding first limiting rubber ring and the corresponding second limiting rubber ring are clamped after the corresponding air bags are inflated, so that the cylindrical rubber air bags and the connecting rubber air bags are fixed quickly, meanwhile, after the end parts exert larger tensile force, the first limiting rubber ring and the second limiting rubber ring can be separated from the corresponding first limiting annular groove and the corresponding second limiting annular groove actively, the cylindrical rubber air bags and the connecting rubber air bags are detached conveniently, the cylindrical rubber air bags and the connecting rubber air bags are maintained regularly, the ash conveying pipelines are disassembled conveniently by adopting a flange plate multi-section connection mode, and maintenance is performed conveniently when the ash conveying pipelines are blocked.
3. According to the pneumatic ash conveying system and method with the dense-phase ash grooves difficult to abrade, the variable-pitch sliding sleeves at the two ends are close to or far away from each other through rotating the operating nuts, so that under the elastic action of the ash conveying elbow, the ash conveying elbow keeps corresponding radian by matching with the tensioning action of the connecting ring and the double-head screw rod, different installation space requirements are adapted, meanwhile, the stress metal rings sleeved at the ends of the ash conveying elbow are arranged, when the double-head screw rod tightens the two ends of the ash conveying elbow, the relative stress at the ends of the ash conveying elbow is uniform, the situation that the ash conveying elbow is undesirably deformed due to long-time pulling of a certain small position is avoided, and the practicability of the whole ash conveying system is further improved.
4. The system provided by the invention simultaneously monitors the gas particles and various parameters of the ash particles provided in the ash conveying bin in real time through the pressure sensor and the ultrasonic monitoring sensor, and builds a calculation model of the movement critical speed and turning speed of the pneumatic ash conveying bin, so that the singlechip after reinforcement learning remotely controls the pneumatic supply device to provide the pressure and the air quantity of the gas and control the quality of the ash falling into the ash conveying bin, and further the ash particles in the ash conveying bin are in a dense phase conveying state, and the ash conveying bin is prevented from being blocked at the turning position of an ash conveying pipeline or from being worn due to too high speed.
Drawings
FIG. 1 is a schematic diagram of a pneumatic ash conveying system provided by the invention;
FIG. 2 is a schematic perspective view of an ash conveying pipeline of the system provided by the invention;
FIG. 3 is a schematic top view of a portion of an ash conveying pipe of the system of the present invention;
FIG. 4 is a schematic view of a broken-away view of an ash chute of an ash conveying pipeline of the system provided by the invention;
FIG. 5 is a schematic view of an arc-shaped rubber air bag of an ash conveying pipeline of the system provided by the invention;
FIG. 6 is a schematic view of a broken-away view of an ash conveying elbow of an ash conveying pipeline of the system provided by the invention;
FIG. 7 is a schematic perspective view of an ash conveying elbow of an ash conveying pipeline of the system provided by the invention;
FIG. 8 is a schematic view of a connecting pipe cut-away of an ash conveying pipeline of the system provided by the invention;
FIG. 9 is a schematic view of a packing column cut-away of an ash conveying line of the system provided by the invention;
FIG. 10 is a schematic flow chart of the pneumatic ash conveying method with the dense-phase ash tank which is not easy to abrade.
In the figure: 1. an ash conveying bent pipe; 2. an ash chute; 3. a connecting pipe; 30. an ash chute collecting device; 301. an input end of the ash chute collecting device; 302. the output end of the ash chute collecting device; 303. an ash bucket; 304. a power pump; 305. a dome valve; 306. an ash conveying bin; 307. an electromagnetic valve; 308. a pressure sensor; 31. pneumatic supply means; 32. a total collection device; 33. an ash conveying pipeline; 4. a cylindrical rubber bladder; 5. a stop valve; 6. a first limit rubber ring; 7. the first limiting annular groove; 8. a mounting ring; 9. snake bone; 10. filling rubber blocks; 11. an arc-shaped rubber air bag; 12. a fixing ring; 13. a stressed metal ring; 14. a connecting ring; 15. a variable-pitch sliding sleeve; 16. a double-ended screw; 17. operating the nut; 18. a packed column; 19. an extension groove; 20. connecting a rubber air bag; 21. the second limit rubber ring; 22. and the second limiting annular groove.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
As described in the background art, in order to solve the technical problems described above, the present application provides a pneumatic ash conveying system and method with a dense phase ash tank that is not easily worn.
In a typical embodiment of the present application, as shown in fig. 1-9, a pneumatic ash conveying system with a dense phase ash chute which is not easy to wear comprises a plurality of ash chute collecting devices 30 connected in parallel, an ash conveying pipeline 33 which communicates all of input ends 301 of the plurality of ash chute collecting devices 30 with a pneumatic supply device 31 and all of output ends 302 of the ash chute collecting devices 30 with a total collecting device 32, wherein the ash chute collecting devices 30 comprise ash hoppers 303, a power pump 304 which is used for pressurizing ash in the ash hoppers so as to enter an ash conveying bin 306, a dome valve 305 which is used for controlling whether ash in the ash hoppers 303 falls in the ash conveying bin 306, and an electromagnetic valve 307, a pressure sensor 308 and an ultrasonic monitoring sensor which are arranged on the input ends 301 of the ash chute collecting devices 30, all of the electromagnetic valve 307, the pressure sensor 308 and the ultrasonic monitoring sensor on the plurality of ash chute collecting devices 30 are connected in wireless communication with a remote central control singlechip, and the total collecting device 32 is one of the ash conveying particles by supplying air by positive pressure of the pneumatic supply device 31; the ash conveying pipeline 33 comprises an ash conveying bent pipe 1 and ash groove pipes 2 which are communicated, the ash groove pipes 2 on two sides are connected with two ends of the ash conveying bent pipe 1 through connecting pipes 3, the ash conveying bent pipe 1 is made of deformable rubber, cylindrical rubber air bags 4 for conveying ash are sleeved in the multi-section ash groove pipes 2, arc-shaped rubber air bags 11 with the same inner diameter as the cylindrical rubber air bags 4 are sleeved in the ash conveying bent pipe 1, adjusting components for changing the bending degree of the ash conveying bent pipe 1 and the arc-shaped rubber air bags 11 are further arranged on the ash conveying bent pipe 1, each adjusting component comprises a plurality of snake bones 9 arranged between the ash conveying bent pipe 1 and the arc-shaped rubber air bags 11, a distance-changing sliding sleeve 15 and a double-end screw 16 for adjusting the distance between the two ends of the ash conveying bent pipe 1, connecting rubber air bags 20 with variable inner diameters are sleeved in the connecting pipes 3 at the two ends of the two ends, the plurality of the snake bones 9 penetrate through the connecting rubber air bags 20 and the connecting pipes 3 at the corresponding sides respectively, wherein, the snake bone 9 is the prior art, only plays a supporting role in the application, for example, the technology shown in Chinese patent literature with publication number of CN110367911B is adopted, compared with the prior art, the application adopts the mode of arranging the cylindrical rubber air bag 4 in the straight pipe ash groove pipe 2 and arranging the arc rubber air bag 11 in the ash conveying elbow pipe 1, and carries out 'non-contact' conveying on dust in cooperation with aerodynamics, so that the abrasion of the inner wall of an ash conveying pipeline caused by high-speed movement of particles in the dust is avoided, compared with the rubber air bag adopted by the fact that the particles directly rubs against the inner wall of the ash conveying pipeline, the air bag has certain elasticity and is in ductile contact with the particles, the abrasion degree is reduced, the requirements of different ash conveying systems are adapted, the conveying channels with different inner diameters are changed, the loss of materials is also reduced, the service life of the whole ash conveying system is prolonged, in addition, the integral bending angle of the ash conveying bent pipe 1 can be adjusted according to actual installation requirements through the adjusting assembly, various installation layouts are adapted, and the practicability of the whole ash conveying system is further improved.
As a preferred implementation manner in this embodiment, the plurality of cylindrical rubber airbags 4 are provided with stop valves 5 for filling or releasing gas, and the plurality of ash chute tubes 2 are also provided with through holes adapted to the positions of the corresponding stop valves 5, and it should be noted that the arc-shaped rubber airbags 11 and the linking rubber airbags 20 are provided with the stop valves 5, and when the inner diameter of the ash conveying channel needs to be adjusted according to the ash conveying system, the expansion degree of each section of the airbags can be adjusted by injecting gas into the corresponding cylindrical rubber airbags 4, the arc-shaped rubber airbags 11 and the linking rubber airbags 20 or exhausting gas therefrom only through the stop valves 5, so as to achieve the required inner diameter, and the operation is convenient. Further, the system of the invention also comprises a first limiting component, the first limiting component comprises a first limiting rubber ring 6 which is arranged on the cylindrical rubber air bags 4 and a first limiting annular groove 7 which is arranged on the ash chute pipe 2 in a matched manner, the first limiting rubber rings 6 are fixedly sleeved on the outer walls of the two ends of the cylindrical rubber air bags 4, the first limiting annular grooves 7 are respectively arranged on the inner walls of the corresponding ash chute pipe 2 and correspond to the positions of the first limiting rubber rings 6, the first limiting rubber rings 6 are respectively clamped in the corresponding first limiting annular grooves 7, the inner walls of the two filling columns 18 are respectively provided with a second limiting annular groove 22, the outer walls of the two connecting rubber air bags 20 are fixedly sleeved with a second limiting rubber ring 21 which is matched with the positions of the corresponding second limiting annular groove 22 in a matched manner, two second limit rubber rings 21 are respectively clamped in corresponding second limit annular grooves 22, filling columns 18 with the lengths identical to those of the connecting pipes 3 are sleeved between the connecting pipes 3 and the connecting rubber air bags 20 at two ends, a plurality of extending grooves 19 which are uniformly distributed are formed at one ends of the two filling columns 18, two ends of a plurality of snake bones 9 are respectively fixedly sleeved in the corresponding extending grooves 19, the ash conveying groove pipes 2, the ash conveying bent pipes 1 and the connecting pipes 3 and the ash conveying groove pipes 2 are connected through flange plates, when ash conveying pipelines are paved, gas is injected into the cylindrical rubber air bags 4, the connecting rubber air bags 11 and the connecting rubber air bags 20 through corresponding stop valves 5, and the cylindrical rubber air bags 4, the connecting rubber air bags 11 and the connecting rubber air bags 20 can only expand inwards due to the restraining actions of the plurality of snake bones 9, the connecting pipes 3 and the ash conveying groove pipes 2, the inner diameter of the ash conveying pipeline is correspondingly adjusted to meet the power requirement of the ash conveying system, meanwhile, the ash conveying pipeline made of traditional metal materials is replaced, dust is conveyed by adopting rubber materials with elasticity, particles in the dust are prevented from being worn on the inner wall of the ash conveying pipeline due to high-speed movement, natural loss of materials is reduced, the service life of the whole ash conveying system is prolonged, in addition, through the arrangement of the first limiting annular groove 7 and the second limiting annular groove 22, the corresponding first limiting rubber ring 6 and the corresponding second limiting rubber ring 21 are conveniently clamped after the corresponding air bags are inflated, so that the cylindrical rubber air bags 4 and the connecting rubber air bags 20 are quickly fixed, simultaneously, after larger pulling force is applied to the end parts, the first limiting rubber ring 6 and the second limiting rubber ring 21 can be actively separated from the corresponding first limiting annular groove 7 and the second limiting annular groove 22, the cylindrical rubber air bags 4 and the connecting rubber air bags 20 are conveniently detached, the cylindrical rubber air bags 4 and the connecting rubber air bags 20 are conveniently and the ash conveying pipeline is conveniently detached and maintained in a multi-section connection mode by adopting a flange plate.
As a preferred embodiment in this embodiment, a plurality of uniformly distributed mounting rings 8 are fixedly mounted on the inner wall of the ash conveying elbow pipe 1, a plurality of snake bones 9 are respectively sleeved in a plurality of mounting rings 8 at corresponding positions, two ends of each of the plurality of snake bones 9 extend out of two sides of the ash conveying elbow pipe 1, the length of each of the arc-shaped rubber air bags 11 and the length of the ash conveying elbow pipe 1 are consistent, deformation can occur along with bending of the plurality of snake bones 9, the inner diameter of each of the arc-shaped rubber air bags 11 is equal to the inner diameter of the connecting rubber air bag 20, a plurality of uniformly distributed filling rubber blocks 10 are fixedly mounted on the inner wall of the ash conveying elbow pipe 1, the length of each filling rubber block 10 is equal to the length of the ash conveying elbow pipe 1, the thickness of each filling rubber block 10 is consistent with the outer diameter of each snake bone 9, the outer wall of each of the arc-shaped rubber air bags 11 is tightly contacted with the outer walls of the plurality of filling rubber blocks 10 and each of the snake bones 9, and the arc-shaped rubber air bags 1 can only be made of rubber materials, the outer diameters of the arc-shaped air bags can only be changed, the inner diameters of the air bags can be tightly bent and the air bags can be tightly supported by the corresponding to the corresponding positions of the plurality of filling rubber blocks 10 and the outer walls of the snake bones 9 can be inflated, and the air bags can be inflated and can be inflated tightly and inflated.
As a preferred implementation manner in the embodiment, the outer walls of the two ends of the ash conveying bent pipe 1 are fixedly connected with a plurality of fixing rings 12 which are uniformly distributed, the plurality of fixing rings 12 on the same side are sleeved with the same stressed metal ring 13, wherein the two fixing rings 12 with the same height are sleeved with connecting rings 14, one ends of two variable-pitch sliding sleeves 15 are respectively and rotatably connected with the connecting rings 14 on the corresponding sides, the two ends of a double-head screw rod 16 are respectively and spirally sleeved in the variable-pitch sliding sleeves 15 on the corresponding sides, the two variable-pitch sliding sleeves 15 are respectively matched with the corresponding ends of the double-head screw rod 16, the middle part of the double-head screw rod 16 is fixedly sleeved with an operating nut 17, when the distance between the operating nut 17 and the variable-pitch sliding sleeves 15 on the two ends is the largest, the ash conveying bent pipe 1 is in an initial state and is in linear arrangement, in this embodiment, when the bending angle of the ash conveying elbow pipe 1 needs to be correspondingly adjusted according to the installation space, the operating nut 17 is rotated, so that the distance-changing sliding sleeves 15 at two ends are close to or far away from each other, and under the elastic action of the ash conveying elbow pipe 1, the ash conveying elbow pipe 1 is kept to have a corresponding radian by matching with the tensioning action of the connecting ring 14 and the double-end screw rod 16, and meanwhile, when the double-end screw rod 16 is used for tensioning two ends of the ash conveying elbow pipe 1, the relative stress at the end parts of the ash conveying elbow pipe 1 is uniform, and the situation that the ash conveying elbow pipe 1 is undesirably deformed due to long-time pulling at a certain small position is avoided, so that the practicability of the whole ash conveying system is further improved.
The working principle of the invention is as follows: when laying the ash conveying pipeline, through the corresponding stop valve 5 to the cylindricality rubber gasbag 4, arc rubber gasbag 11 and link up the gas injection in the rubber gasbag 20, because the constraint effect of a plurality of snakes bone 9, connecting pipe 3 and ash chute pipe 2, make cylindricality rubber gasbag 4, arc rubber gasbag 11 and link up the rubber gasbag 20 and only can take place inboard inflation, and reach same internal diameter size, thereby realize corresponding adjustment ash conveying pipeline's internal diameter size, with the power requirement of adaptation ash conveying system, simultaneously, replaced traditional metal material's ash conveying pipeline, adopt and have elastic rubber material to carry the dust, avoid the particulate matter in the dust to remove the inner wall of wearing and tearing ash conveying pipeline because of high speed, the natural loss of material has been reduced, the life of whole ash conveying system has been improved.
Through seting up first spacing ring channel 7 and the spacing ring channel 22 of second, the first spacing rubber circle 6 and the spacing rubber circle 21 of second that the block corresponds after the convenient gasbag of corresponding aerifys to fixed cylindricality rubber gasbag 4 fast and link up rubber gasbag 20, simultaneously, after great pulling force is applyed to the tip, first spacing rubber circle 6 and the spacing rubber circle 21 of second can initiatively break away from first spacing ring channel 7 and the spacing ring channel 22 of second that correspond, the cylindricality rubber gasbag 4 is convenient for dismantle with link up rubber gasbag 20, the cylindricality rubber gasbag 4 is convenient for regularly maintain with link up rubber gasbag 20, through the mode that adopts the ring flange multistage to connect, the dismouting ash conveying pipeline of being convenient for, repair when convenient ash conveying pipeline takes place to block up.
When the bending angle of the ash conveying elbow pipe 1 needs to be correspondingly adjusted according to the installation space, the operating nuts 17 are rotated to enable the distance-changing sliding sleeves 15 at the two ends to be close to or far away from each other, so that under the elastic action of the ash conveying elbow pipe 1, the ash conveying elbow pipe 1 keeps corresponding radian due to the tensioning action of the connecting ring 14 and the double-end screw rod 16, and meanwhile, when the double-end screw rod 16 is used for tensioning the two ends of the ash conveying elbow pipe 1, the ends of the ash conveying elbow pipe 1 are uniformly stressed relatively, and the situation that the ash conveying elbow pipe 1 is undesirably deformed due to long-time pulling is avoided, so that the practicability of the whole ash conveying system is further improved.
The invention also provides a pneumatic ash conveying method with the dense-phase ash groove which is not easy to wear, which is specifically applied to the pneumatic ash conveying system with the dense-phase ash groove which is not easy to wear, as shown in fig. 10, and comprises the following steps:
s1, discharging: when the material level in the ash bucket 303 of one ash bin collecting device 30 of the system reaches the lowest discharge material level, a dome valve 305 is opened, and a power pump 304 pressurizes the falling of ash in the ash bucket 303 and enters an ash conveying bin 306;
s2, conveying: the remote central control singlechip controls the pneumatic supply device 31 to start, air is introduced into the ash conveying bin 306 in the ash trough collecting device 30, the pressurizing pressure is regulated, the electromagnetic valve 307 on the input end 301 of the corresponding ash trough collecting device 30 in the step S1 is opened, and the corresponding pressure sensor 308 monitors the pressure p of the input gas of the input end 301 of the corresponding ash trough collecting device 30 at the time t in real time tg And the ultrasonic monitoring sensor monitors the gas moving speed v in the ash conveying bin 306 at the t moment in real time tg The pneumatic supply means 31 supplies the mass q of the added gas particles a Velocity v of movement of ash particles in ash feed bin 306 tm Mass q of ash particles m The pressure p to which the ash particles are subjected tm Constructing the critical speed v of pneumatic ash conveying and ash material movement a Calculation model and pneumatic ash conveying ash material moving turning speed v b Calculating a model to obtain the critical speed v of pneumatic ash conveying a And turning speed v b ；
S3, adjusting the pressurizing pressure of the pneumatic supply device 31 and the mass of the ash materials added into the ash conveying bin 306 by the ash hopper 303;
s4: judging the real-time ash moving speed v in the ash conveying bin 306 of the ash chute collecting device 30 im Whether the following pneumatic ash conveying ash material moving speed threshold range is met: v b ＜v tm ＜v a ；
S5: if yes, judging that the ash in the ash chute collecting device 30 is in a dense phase ash conveying state, discharging ash from the input end 301 of the ash chute collecting device 30 to the output end 302 of the ash chute collecting device 30, otherwise, repeating the steps S1-S4 to enable the ash in the ash conveying bin 306 in the ash chute collecting device 30 to be in a dense phase ash conveying state;
s6: when the ash in the ash conveying bin 306 is conveyed, the pressure of the ash conveying bin 306 is reduced; when the pressure in the ash conveying bin 306 reduces the lower limit pressure, the remote central control singlechip controls the pneumatic supply device 31 and the corresponding electromagnetic valve 307 to be closed, so that pneumatic ash conveying of the ash chute collecting device 30 is completed.
Pneumatic ash conveying critical speed v of ash material movement a The pneumatic ash conveying and moving turning speed v is the minimum speed at which ash particles can move without sedimentation under the drive of the gas supplied to the ash conveying bin 306 by the pneumatic supply device 31 b The pressure p at time t of the input gas at the input 301 of the corresponding ash chute collector 30 is thus monitored in real time by the corresponding pressure sensor 308 for a minimum speed at which ash particles will not clog in the pipe tg And the ultrasonic monitoring sensor monitors the gas moving speed v in the ash conveying bin 306 at the t moment in real time tg The pneumatic supply means 31 supplies the mass q of the added gas particles a Velocity v of movement of ash particles tm Mass q of ash particles in ash feed bin 306 m The pressure p to which the ash particles are subjected tm Two minimization calculation models are constructed: pneumatic ash conveying critical speed v of ash material movement a Calculation model and pneumatic ash conveying ash material moving turning speed v b Calculating a model, and limiting a threshold range of the moving speed of the pneumatic ash conveying ash material: v b ＜v tm ＜v a Limiting the movement speed v of ash particles in ash conveying bin tm Can not be greater than the critical speed v of the pneumatic ash conveying and ash material movement a (minimum speed of movement without sedimentation under the driving of gas) can limit the pressurizing pressure of the pneumatic supply device 31 in the step S3 and the total mass of the ash particles added into the ash conveying bin 306 by the ash hopper 303, thereby effectively regulating and controlling the gas supplied by the pneumatic supply device 31 in the ash conveying bin 306 The dense phase state which can not be settled and can flow is formed after pressurization fluidization, so that the excessive flow speed of ash particles which form a dilute phase state in the ash conveying bin 306 after fluidization by more mass and volume of gas is avoided, the large collision impact force is avoided at the ash conveying bent pipe 1 of the ash conveying pipeline 33, and the ash conveying bent pipe of the pneumatic ash conveying system is further controlled in the aspects of pressure intensity and mass of pressurized gas and ash adding quality and is not easy to be worn.
At the same time, the maximum speed of the device can not exceed the turning speed v of the pneumatic ash conveying material b (minimum speed at which ash particles cannot be blocked in a pipeline), and further controlling the movement speed v of ash particles in an ash conveying bin from a lower limit range tm The device always maintains a concentrated phase state without sedimentation, and avoids abrasion at an ash conveying bent pipe of a pneumatic ash conveying system.
Then the reinforcement learning is carried out on the remote central control singlechip connected by wireless communication,
as another preferred embodiment of the invention, the pneumatic ash conveying material constructed in the step S2 moves at the critical speed v a The calculation model is as follows:
s.t.u a ＞0；
ρ a ＞0；
v tg ＞0；
v tm ＞0；
solving for v tm The critical speed v of the pneumatic ash conveying and moving is a ；
Wherein,,
for the gradient operator, the gas particles supplied to the pneumatic supply device 31 are subjected to full differentiation in all directions in a three-dimensional space; / >
The gas moving speed v in the ash conveying bin 306 at the t-th moment tg Is a vector of (2); />
The moving speed v of the ash particles in the ash conveying bin 306 at the t-th moment tm Is a vector of (2); u (u) a The volume ρ of the gas particles added to the pneumatic supply means 31 a Supplying the pneumatic supply means 31 with the density of the added gas particles; g is gravity acceleration; m is M tg The acting force coefficient of the gas and the ash particles in the ash conveying bin 306; t is the length of time for which the pneumatic supply device 31 supplies air;
wherein q m Q is the mass of the ash particles in the ash conveying bin 306 a The pneumatic supply means 31 is supplied with the mass of the added gas particles.
As another preferred embodiment of the invention, the pneumatic ash conveying ash material moving turning speed v constructed in the step S2 b The calculation model is as follows:
s.t.u m ＞0；
ρ m ＞0；
v tg ＞0；
v tm ＞0；
v tm，i ＞0；
v tm，i+1 ＞0；
solving for v tm，i Namely the moving turning speed v of the pneumatic ash conveying ash material b ；
Wherein,,
for gradient operatorsTo supply the gas particles added to the pneumatic supply device 31 respectively, to perform full differentiation in all directions in three-dimensional space; />
The gas moving speed v in the ash conveying bin 306 at the t-th moment tg Is a vector of (2);
the moving speed v of the ash particles in the ash conveying bin 306 at the t-th moment tm Is a vector of (2); u (u) a The volume ρ of the gas particles added to the pneumatic supply means 31 a Supplying the pneumatic supply means 31 with the density of the added gas particles; g is gravity acceleration; m is M tg The acting force coefficient of the gas and the ash particles in the ash conveying bin 306; m is M tm The acting force coefficient of the ith ash particle and the (i+1) th ash particle in the ash conveying bin 306; t is the length of time for which the pneumatic supply device 31 supplies air; />
The movement speed v of the ith ash particle at the time t tm，i Vector of->
The movement speed v of the (i+1) th gray particles at the time t tm，i+1 I=1, 2, …, n; u (u) m For the volume ρ of ash particles in the ash feed bin 306 m Is the density of ash particles in the ash feed bin 306;
wherein q m Q is the mass of the ash particles in the ash conveying bin 306 a The pneumatic supply means 31 is supplied with the mass of the added gas particles.
Movement velocity v of ith ash particle at time t tm，i And the movement velocity v of the (i+1) th ash particle at time t tm，i+1 All belong to the moving speed v of the ash particles in the ash conveying bin 306 obtained by real-time monitoring of the ultrasonic monitoring sensor in the step S2 tm There is no need to distinguish the ith ash particle from the (i+1) th ash particle when considering the interaction of the gas particles with the ash particles.
Further, the acting force coefficient M of the ith ash particle and the (i+1) th ash particle in the ash conveying bin 306 tm The calculation formula of (2) is as follows:
wherein, sigma is the recovery constant after collision friction between ash particles, sigma is E [0,1 ]]，d tm，i The diameter of the ith ash particle at the moment t, d tm，i+1 The diameter of the +1st ash particle at the time t is G i，i+1 Is the friction coefficient between the ith ash particle and the (i+1) th ash particle,
the movement speed v of the ith ash particle at the time t tm，i Vector of->
The movement velocity v of the (i+1) th gray particles at the moment t tm，i+1 Vector of->
And taking a differential mode.
Further, the acting force coefficient M of the gas and the ash particles in the ash conveying bin 306 tg The calculation formula of (2) is as follows:
when u is a At a time of > 0.75 f,
when u is a When the temperature is less than or equal to 0.75 percent,
wherein C is a，m To provide a coefficient of friction between the gas particles and the ash particles within the ash feed bin 306,
for the movement velocity v of the gas particles at time t tg Vector of->
Velocity v of movement of the soot particles at time t tm Vector of->
Modeling the difference; d, d tm The diameter of the ash particles in the ash feed bin 306 at time t.
By the amount of the gas supplied to the ash conveying bin 306 by the different gas supplying devices 31, the gas supplied is more or less, and the gas particle volume in the ash conveying bin is larger (u a > 0.75) or smaller (u a Less than or equal to 0.75) of the acting force coefficient M of the gas and the ash particles in the ash conveying bin 306 tg And further effectively limits and distinguishes different gas transmission states, and improves the control accuracy and precision of the remote central control singlechip under the condition of gas transmission supply of different gas ash transmission systems.
Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (9)
1. Pneumatic ash conveying system with difficult wearing and tearing dense phase ash groove, including a plurality of parallelly connected ash groove collection device (30), with the input (301) of a plurality of ash groove collection device (30) all with pneumatic supply device (31) intercommunication and ash conveying pipeline (33) that output (302) of ash groove collection device (30) all with total collection device (32) intercommunication, ash groove collection device (30) include ash bucket (303), power pump (304), be used for controlling whether ash in ash bucket (303) drops on dome valve (305) in ash conveying feed bin (306) and set up solenoid valve (307), pressure sensor (308) and ultrasonic monitoring sensor on input (301) of ash groove collection device (30), the pneumatic ash conveying device is characterized in that electromagnetic valves (307), pressure sensors (308) and ultrasonic monitoring sensors on the pneumatic supply device (31) and the ash trough collecting devices (30) are all in wireless communication connection with a remote central control singlechip, the ash conveying pipeline (33) comprises ash conveying bent pipes (1) and ash trough pipes (2) which are communicated, the ash trough pipes (2) on two sides are connected with the two ends of the ash conveying bent pipes (1) through connecting pipes (3), the ash conveying bent pipes (1) are made of deformable rubber materials, cylindrical rubber air bags (4) used for ash conveying are sleeved in the ash conveying bent pipes (2), an arc-shaped rubber air bag (11) with the inner diameter equal to that of the cylindrical rubber air bag (4) is sleeved in the ash conveying elbow pipe (1), an adjusting component for changing the bending degree of the ash conveying elbow pipe (1) and the arc-shaped rubber air bag (11) is further arranged on the ash conveying elbow pipe (1), the adjusting component comprises a plurality of snake bones (9) arranged between the ash conveying elbow pipe (1) and the arc-shaped rubber air bag (11), and a variable-pitch sliding sleeve (15) and a double-head screw (16) for adjusting the distance between two ends of the ash conveying elbow pipe (1);
The connecting pipe (3) at two ends is internally sleeved with a connecting rubber air bag (20) with a variable inner diameter, and two ends of a plurality of snake bones (9) respectively penetrate through the connecting rubber air bag (20) at the corresponding side and the connecting pipe (3);
a plurality of uniformly distributed fixing rings (12) are fixedly connected to the outer walls of the two ends of the ash conveying bent pipe (1), one stress metal ring (13) is sleeved in the plurality of fixing rings (12) on the same side, connecting rings (14) are sleeved on the two fixing rings (12) with the same height, one ends of two variable-pitch sliding sleeves (15) are respectively and rotatably connected to the connecting rings (14) on the corresponding sides, the two ends of the double-end screw rods (16) are respectively and spirally sleeved in the variable-pitch sliding sleeves (15) on the corresponding sides, and the two variable-pitch sliding sleeves (15) are respectively matched with the corresponding ends of the double-end screw rods (16); the middle part of double-end screw rod (16) has still fixed sleeve joint operating nut (17), operating nut (17) with both ends when displacement sliding sleeve (15) interval is the biggest, ash conveying return bend (1) are located initial state and are sharp and arrange.
2. The pneumatic ash conveying system with the dense-phase ash grooves difficult to wear according to claim 1, wherein a plurality of cylindrical rubber air bags (4) are respectively provided with a stop valve (5) for filling or releasing gas, and a plurality of ash groove pipes (2) are respectively provided with a through hole matched with the position of the corresponding stop valve (5); the system further comprises a first limiting assembly, wherein the first limiting assembly comprises a first limiting rubber ring (6) which is arranged on the cylindrical rubber air bag (4) in a matched mode and a first limiting annular groove (7) which is arranged on the ash groove pipe (2), the outer walls of the two ends of the cylindrical rubber air bag (4) are fixedly sleeved with the first limiting rubber ring (6), the first limiting annular grooves (7) are respectively arranged on the inner wall of the corresponding ash groove pipe (2) and correspond to the positions of the first limiting rubber rings (6), and the first limiting rubber rings (6) are respectively clamped in the corresponding first limiting annular grooves (7).
3. The pneumatic ash conveying system with the dense-phase ash grooves difficult to wear according to claim 1, wherein a plurality of uniformly distributed mounting rings (8) are fixedly arranged on the inner wall of the ash conveying elbow pipe (1), a plurality of snake bones (9) are respectively sleeved in the mounting rings (8) at corresponding positions, and two ends of the snake bones (9) extend out of two sides of the ash conveying elbow pipe (1); the length of the arc-shaped rubber air bag (11) is consistent with that of the ash conveying bent pipe (1), the arc-shaped rubber air bag can deform along with bending of the plurality of snake bones (9), and the inner diameter of the arc-shaped rubber air bag (11) is equal to the inner diameter of the connecting rubber air bag (20);
the inner wall of the ash conveying elbow pipe (1) is fixedly provided with a plurality of filling rubber blocks (10) which are uniformly distributed, the length of each filling rubber block (10) is equal to the length of the ash conveying elbow pipe (1), the thickness of each filling rubber block (10) is consistent with the outer diameter of each snake bone (9), and the outer wall of each arc-shaped rubber air bag (11) is in close contact with a plurality of filling rubber blocks (10) and the outer wall of each snake bone (9).
4. The pneumatic ash conveying system with the dense-phase ash grooves difficult to wear according to claim 3, wherein filling columns (18) with the same length as the connecting pipes (3) are sleeved between the connecting pipes (3) at two ends and the connecting rubber air bags (20), a plurality of extending grooves (19) which are uniformly distributed are formed at one end of each filling column (18), two ends of a plurality of snake bones (9) are fixedly sleeved in the corresponding extending grooves (19), and the ash groove pipes (2), the ash conveying bent pipes (1), the connecting pipes (3) and the ash groove pipes (2) at adjacent sections are connected through flange plates; the inner walls of the two filling columns (18) are provided with second limit annular grooves (22), the outer walls of the two connecting rubber air bags (20) are fixedly sleeved with second limit rubber rings (21) which are matched with the positions of the corresponding second limit annular grooves (22), and the two second limit rubber rings (21) are respectively clamped in the corresponding second limit annular grooves (22).
5. A pneumatic ash conveying method with a dense phase ash tank which is not easy to wear, wherein the method adopts the pneumatic ash conveying system with the dense phase ash tank which is not easy to wear as claimed in any one of claims 1 to 4, and the method is characterized by comprising the following steps:
s1, discharging: -opening the dome valve (305) when the level in the hopper (303) of one of the system's ash chute collecting devices (30) reaches the lowest discharge level, the power pump (304) pressurizing the fall of ash in the hopper (303) into the ash delivery bin (306);
s2, conveying: the remote central control singlechip controls the pneumatic supply device (31) to start, air is introduced into the ash conveying bin (306) in the ash trough collecting device (30), the pressurizing pressure is regulated, and the corresponding part in the step S1 is startedThe electromagnetic valve (307) on the input end (301) of the ash trough collecting device (30), the corresponding pressure sensor (308) monitors the pressure p of the input gas of the input end (301) of the corresponding ash trough collecting device (30) at the t moment in real time tg And the ultrasonic monitoring sensor monitors the gas moving speed v in the ash conveying bin (306) at the t moment in real time tg The pneumatic supply device (31) supplies the mass q of the added gas particles a The moving speed v of ash particles in the ash conveying bin (306) tm Mass q of ash particles m The pressure p to which the ash particles are subjected tm Constructing the critical speed v of pneumatic ash conveying and ash material movement a Calculation model and pneumatic ash conveying ash material moving turning speed v b Calculating a model to obtain the critical speed v of pneumatic ash conveying a And turning speed v b ；
S3, adjusting the pressurizing pressure of the pneumatic supply device (31) and the mass of the ash materials added into the ash conveying bin (306) by the ash hopper (303);
s4: judging real-time ash moving speed v in ash conveying bin (306) of ash chute collecting device (30) tm Whether the following pneumatic ash conveying ash material moving speed threshold range is met: v b ＜v tm ＜v a ；
S5: if yes, judging that the ash in the ash bin collecting device (30) is in a concentrated phase ash conveying state, discharging ash from the input end (301) of the ash bin collecting device (30) to the output end (302) of the ash bin collecting device (30), otherwise, repeating the steps S1-S4 to enable the ash in the ash bin (306) in the ash bin collecting device (30) to be in a concentrated phase ash conveying state;
s6: when the ash in the ash conveying bin (306) is conveyed, the pressure of the ash conveying bin (306) is reduced; when the pressure in the ash conveying bin (306) reduces the lower limit pressure, the remote central control singlechip controls the pneumatic supply device (31) and the corresponding electromagnetic valve (307) to be closed, so that pneumatic ash conveying of the ash groove collecting device (30) is completed.
6. The method of claim 5, wherein the method comprises the step of forming a dense phase ash trough with low wear resistanceThe pneumatic ash conveying method is characterized in that the pneumatic ash conveying ash constructed in the step S2 moves at a critical speed v a The calculation model is as follows:
s.t.u a ＞0；
ρ a ＞0；
v tg ＞0；
v tm ＞0；
solving for v tm The critical speed v of the pneumatic ash conveying and moving is a ；
Wherein,,
for the gradient operator, the gas particles supplied to the pneumatic supply device (31) are subjected to full differentiation in all directions in three-dimensional space; />
Is the gas moving speed v in the ash conveying bin (306) at the t-th moment tg Is a vector of (2);
is the moving speed v of ash particles in the ash conveying bin (306) at the t-th moment tm Is a vector of (2); u (u) a Supplying the pneumatic supply device (31) with the volume, ρ, of the added gas particles a -supplying the pneumatic supply means (31) with the density of the added gas particles; g is gravity acceleration; m is M tg The acting force coefficient of the gas and the ash particles in the ash conveying bin (306); t is the length of time for supplying air to the pneumatic supply device (31);
wherein q m For the mass, q, of the ash particles in the ash conveying bin (306) a Supplying the pneumatic supply device (31) with the mass, ρ of the added gas particles m Is the density of the ash particles in the ash conveying bin (306).
7. The pneumatic ash conveying method with the dense-phase ash trough being difficult to wear as set forth in claim 5, wherein the pneumatic ash conveying ash constructed in the step S2 is moved at turning speed v b The calculation model is as follows:
s.t.u m ＞0；
ρ m ＞0；
v tg ＞0；
v tm ＞0；
v tm，i ＞0；
v tm，i+1 ＞0；
solving for v tm，i Namely the moving turning speed v of the pneumatic ash conveying ash material b ；
Wherein,,
for the gradient operator, the gas particles supplied to the pneumatic supply device (31) are subjected to full differentiation in all directions in three-dimensional space; />
Is the gas moving speed v in the ash conveying bin (306) at the t-th moment tg Is a vector of (2);
is the moving speed v of ash particles in the ash conveying bin (306) at the t-th moment tm Is a vector of (2); u (u) a Supplying the pneumatic supply device (31) with a body of added gas particlesProduct ρ a -supplying the pneumatic supply means (31) with the density of the added gas particles; g is gravity acceleration; m is M tg The acting force coefficient of the gas and the ash particles in the ash conveying bin (306); m is M tm The acting force coefficient of the ith ash particle and the (i+1) th ash particle in the ash conveying bin (306); t is the length of time for supplying air to the pneumatic supply device (31); />
The movement speed v of the ith ash particle at the time t tm， Vector of i>
The movement speed v of the (i+1) th gray particles at the time t tm，i+1 I=1, 2, …, n; u (u) m For the volume ρ of ash particles in the ash conveying bin (306) m -a density of ash particles within the ash conveying bin (306);
wherein q m For the mass, q, of the ash particles in the ash conveying bin (306) a The pneumatic supply device (31) is supplied with the mass of the added gas particles.
8. The pneumatic ash conveying method with the dense-phase ash chute being not easy to wear as set forth in claim 7, characterized in that the force coefficient M of the ith ash particle and the (i+1) th ash particle in the ash conveying bin (306) tm The calculation formula of (2) is as follows:
wherein, sigma is the recovery constant after collision friction between ash particles, sigma is E [0,1 ]]，d tm，i The ith ash particle at time tDiameter d of (d) tm，i+1 The diameter of the +1st ash particle at the time t is G i，i+1 Is the friction coefficient between the ith ash particle and the (i+1) th ash particle,
the movement speed v of the ith ash particle at the time t tm，i Vector of->
The movement velocity v of the (i+1) th gray particles at the moment t tm，i+1 Vector of->
And taking a differential mode.
9. Pneumatic ash conveying method with dense phase ash chute being not easy to wear as claimed in claim 6 or 7, characterized in that the acting force coefficient M of gas and ash particles in the ash conveying bin (306) tg The calculation formula of (2) is as follows:
when u is a At a time of > 0.75 f,
when u is a When the temperature is less than or equal to 0.75 percent,
wherein C is a，m For the friction coefficient between the gas particles and the ash particles in the ash conveying bin (306),
for the movement velocity v of the gas particles at time t tg Vector of->
Velocity v of movement of the soot particles at time t tm Vector of->
Modeling the difference; d, d tm And the diameter of the ash particles in the ash conveying bin (306) at the time t.
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