CN117599536A - Dust remover ship-shaped ash bucket bridge detection and automatic bridge breaking device and method - Google Patents

Dust remover ship-shaped ash bucket bridge detection and automatic bridge breaking device and method Download PDF

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Publication number
CN117599536A
CN117599536A CN202311540730.6A CN202311540730A CN117599536A CN 117599536 A CN117599536 A CN 117599536A CN 202311540730 A CN202311540730 A CN 202311540730A CN 117599536 A CN117599536 A CN 117599536A
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China
Prior art keywords
ash
ash bucket
dust remover
bridge
ship
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CN202311540730.6A
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Chinese (zh)
Inventor
陈荣
武峰
严社教
高飞
杜向前
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Huatian Engineering and Technology Corp MCC
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Huatian Engineering and Technology Corp MCC
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Priority to CN202311540730.6A priority Critical patent/CN117599536A/en
Publication of CN117599536A publication Critical patent/CN117599536A/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
    • B01D46/42—Auxiliary equipment or operation thereof
    • B01D46/44—Auxiliary equipment or operation thereof controlling filtration
    • B01D46/446—Auxiliary equipment or operation thereof controlling filtration by pressure measuring
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
    • B01D46/42—Auxiliary equipment or operation thereof
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
    • B01D46/42—Auxiliary equipment or operation thereof
    • B01D46/48—Removing dust other than cleaning filters, e.g. by using collecting trays
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
    • B01D46/66—Regeneration of the filtering material or filter elements inside the filter
    • B01D46/70—Regeneration of the filtering material or filter elements inside the filter by acting counter-currently on the filtering surface, e.g. by flushing on the non-cake side of the filter
    • B01D46/71—Regeneration of the filtering material or filter elements inside the filter by acting counter-currently on the filtering surface, e.g. by flushing on the non-cake side of the filter with pressurised gas, e.g. pulsed air
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
    • G01L5/00—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes
    • G01L5/0028—Force sensors associated with force applying means
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2258/00—Sources of waste gases
    • B01D2258/02—Other waste gases
    • B01D2258/0283—Flue gases
    • 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
    • Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
    • Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
    • Y02A50/2351—Atmospheric particulate matter [PM], e.g. carbon smoke microparticles, smog, aerosol particles, dust

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Analytical Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Gasification And Melting Of Waste (AREA)

Abstract

The invention discloses a device and a method for detecting and automatically breaking a bridge of a ship-shaped ash bucket of a dust remover, and relates to the technical field of dust removing mechanisms. The device for detecting and automatically breaking the bridge of the ship-shaped ash bucket of the dust remover comprises the ash bucket of the dust remover, wherein one side of the ash bucket of the dust remover is sequentially provided with a pressure sensor and an electro-hydraulic push rod from top to bottom, an inner supporting rod is arranged in the ash bucket of the dust remover, and an ash bucket fluidization chute is arranged below the ash bucket of the dust remover. The device and the method for detecting and automatically breaking the bridge of the ship-shaped ash bucket of the dust remover can judge the ash blocking state and the ash blocking position of the ship-shaped ash bucket in real time, remind operators to take measures, and complete the breaking of the bridge of the ash bucket in an automatic or manual operation mode. The mechanical vibration ash removal commonly used by the ash bucket is canceled, and the ash bucket has positive effects on maintaining the structural strength of the ash bucket and preventing welding seams from cracking caused by vibration of the wall plates. The walking type ash removing process is adopted, the ash removing process is controllable, the ash can directly reach the center of the material bridge, and no dead angle exists in ash removing.

Description

Dust remover ship-shaped ash bucket bridge detection and automatic bridge breaking device and method
Technical Field
The invention relates to the technical field of dust removing mechanisms, in particular to a device and a method for detecting and automatically breaking a bridge of a ship-shaped ash bucket of a dust remover.
Background
With the continuous progress of ultralow emission reconstruction in the industries of national propulsion steel, building materials and the like, the circulating fluidized bed desulfurization dust removal technology has the characteristics of large flue gas treatment amount, good adaptability, simple process flow, simple operation and maintenance, high desulfurization efficiency, no secondary pollution and the like, and is widely applied to the field of flue gas pollutant treatment.
The dust collector matched with the circulating fluidized bed desulfurization process is large in powder collection amount, a ship-shaped ash bucket is generally adopted at the bottom of the dust collector as a temporary ash storage and transportation facility, the volume of a single ship-shaped ash bucket is up to more than 700 cubic meters, a large number of inner supporting rods are arranged in the ship-shaped ash bucket to ensure the structural strength of the ash bucket to prevent deformation of a wall plate, sticky desulfurization ash is easy to accumulate at the inner supporting rod to form a material bridge, the higher the accumulation of the desulfurization ash is, operators are not easy to perceive, manual interference is not realized, and finally the desulfurization ash overflows the upper surface of the ash bucket to cause the whole ash bucket to be torn instantly when being overloaded, a large amount of high temperature and corrosive desulfurization ash flows to a dust collector platform, so that serious safety and quality accidents occur. The dust hopper of the dust remover of the belt type roasting machine flue gas desulfurization device of a certain steel factory in 2022 collapses. The direct reason of the accident is that operators do not find ash blocking of the ash bucket in time to form a material bridge, when the desulfurization ash overflows the upper surface of the ash bucket to leak ash, on-site personnel command the operation against rules and regulations in a rough way, ash removal is carried out, the ash accumulation instantly tears the wall plate of the ash bucket, a large amount of high-temperature and corrosive desulfurization ash flows to the platform, workers cannot avoid the problem, serious safety accidents occur, and the total weight of the desulfurization ash on the platform and the ground is weighed up to 864.255 tons.
The negative pressure monitoring device for the ash hopper material level of the dust remover disclosed in the patent CN 218628534U adopts a method of monitoring the negative pressure value in the ash hopper by a negative pressure transmitter to indirectly judge the material level condition of the ash hopper of the dust remover, and the method can only roughly judge the material level of the ash hopper and can not judge whether the ash hopper is in a material blockage state to form a material bridge, because the ash hopper of the dust remover needs to store a certain amount of dust removing ash under the normal ash discharging and transporting working condition of the dust remover.
Patent CN 201572584U discloses a clear stifled device for dust remover, including gas holder, electromagnetic pulse valve, spray tube. The spray pipe is inserted into the ash bucket and is downwards arranged along the wall surface of the ash bucket, the electromagnetic pulse valve is opened during operation, dust removal gas cleans dust in the ash bucket through the spray pipe, the spray pipe of the device is easy to be buried into the dust to be blocked, the dust removal range is limited, the dust removal force is not large, the dust removal is not thorough, and the large-scale bridge of the ash bucket is limited in breaking effect.
Therefore, a device and a method capable of judging the blocking state and the blocking position of the ash bucket in real time and automatically breaking a bridge to remove ash are developed and are lifted to schedule.
Disclosure of Invention
(one) solving the technical problems
Aiming at the defects of the prior art, the invention provides a device and a method for detecting and automatically breaking a bridge of a ship-shaped ash bucket of a dust remover, which solve the problems in the prior art.
(II) technical scheme
In order to achieve the above purpose, the invention is realized by the following technical scheme: the utility model provides a dust remover ship-shaped ash bucket bridge detection and automatic bridge breaking device, includes the dust remover ash bucket, one side of dust remover ash bucket has set gradually pressure sensor and electrohydraulic push rod from top to bottom, be provided with interior vaulting pole in the dust remover ash bucket, the below of dust remover ash bucket is provided with ash bucket fluidization chute, the below of ash bucket fluidization chute is provided with powder flow control valve, the below of powder flow control valve is provided with the powder flowmeter, the below of powder flowmeter is provided with the elephant trunk, the below of elephant trunk is provided with the returning chute;
the spiral hose, the pulse valve and the steam drum are sequentially arranged below the electro-hydraulic push rod from top to bottom, and the ash removal plug, the ash removal spray gun and the air charging cavity which are mutually matched are arranged on the right side of the electro-hydraulic push rod;
wherein, the electrohydraulic push rod, the spiral hose, the pulse valve, the steam drum, the ash removing plug, the ash removing spray gun and the inflation cavity form a walking type bridge breaking system.
Preferably, the pressure sensors are arranged on a long-side wall plate of the dust hopper of the dust remover, a plurality of rows of pressure sensors are sequentially arranged from top to bottom, the horizontal spacing is 3.8-5 meters, the vertical spacing is 2.2-3.4 meters, and the pressure measuring range of the sensors is-4000 Pa to +2000Pa. The pressure sensor pressure taking port is provided with a nitrogen purging device.
Preferably, the electro-hydraulic push rod is arranged on a long-side wall plate of the ash bucket of the dust remover, the installation height is 1/2-1/3 of the height of the ash bucket, and the electro-hydraulic push rod is sequentially arranged along the length direction from the bottom of the ash bucket of the dust remover, and the transverse interval is 2.4 meters to 3.6 meters.
Preferably, the steam drum is a nitrogen gas drum, the pressure is 0.4-0.6MPa, and the volume is 0.08-0.12m 3 。
Preferably, the electro-hydraulic push rod is a DG-B type electro-hydraulic push rod, the rated thrust is 6.86KN-9.8KN, the rated stroke of the electro-hydraulic push rod is 0.8-1 meter, a photoelectric switch is arranged at the half-stroke position of the push rod, and an electric control system acquires a push rod position signal
Preferably, the ash removing spray gun is arranged back to back along the horizontal direction by taking the air filling cavity as the center, the spray gun adopts venturi tube acceleration, the flow speed of an inlet section is 30-50m/s, the flow speed of a throat opening is 80-110m/s, the angle of the inlet section is 40-55 degrees, the angle of an outlet section is 20-30 degrees, and the diameters of the inlet and the outlet are the same
Preferably, the ash removing plug is arranged at the front end of the electro-hydraulic push rod, the width of the ash removing plug is 20 mm from the outlet end of the spray gun, the length of the cone section is 0.2-0.3 m, and the angle of the cone section is 22-38 degrees. The plug is of a length to cover the inflation lumen.
The construction method of the dust remover ship-shaped ash bucket material bridge detection and automatic bridge breaking device comprises the following specific operations:
when the powder hopper is installed, an ash hopper fluidization chute, an air charging box, a powder flow regulating valve, a chute, a powder flowmeter and a return fluidization chute are sequentially installed from the bottom of the ash hopper;
the powder flow regulating valve has a conveying amount which is 1.2-1.3 times of the powder collecting amount of the dust hopper of the dust remover, and the valve opening control and valve position display adopt standard analog quantity signals of 4-20 mA;
the measuring range of the powder flowmeter is 1.2-1.3 times of the powder collecting amount of the dust hopper of the dust remover, and the flowmeter adopts standard 4-20 mA analog output;
the computer programs, sets the alarm range of ash bucket, monitors the pressure measurement signal of pressure sensor, when the ash is over the pressure measuring tube, the pressure of pressure sensor is increased, from negative pressure to near atmospheric pressure (more than-500 Pa). The pressure sensor alarms, and the color changes from gray to red, so that the phenomenon of blocking ash in the area is indicated.
The computer programs, under the normal ash conveying condition, the opening of the flow regulating valve takes 20% as a first gear, 5 gears are set, and the powder flow corresponding to each gear is calibrated. The compiled form is input to a computer for standby.
The computer monitors the ash conveying process of the ship-shaped ash bucket of the dust remover in real time, and when the ash conveying amount corresponding to the opening of the flow valve is reduced by more than 50% compared with the calibration value and the ash blocking alarm occurs to the ash bucket sensor of the dust remover, the formation of a material bridge inside the ship-shaped ash bucket is indicated.
The walking type bridge breaking system automatically acts, a pulse valve blows, nitrogen is blown out from a spray gun to purge peripheral ash blocking, then an electro-hydraulic push rod stretches out, an ash removing plug is inserted into the middle position of a material bridge, the pulse valve blows to purge the peripheral ash blocking, then the electro-hydraulic push rod continues to advance, the ash removing plug is inserted into three quarters of an ash bucket, the pulse valve blows to purge the peripheral ash blocking, the electro-hydraulic push rod retracts to the initial position, and a pressure sensor measures the ash mouth to be purged with nitrogen. After one flow is completed, the structure of the hopper bridge is destroyed, and the bridge collapses. And sequentially actuating a bridge breaking system near the alarm area of the pressure sensor to complete the bridge breaking process of the whole ship-shaped ash bucket.
(III) beneficial effects
The invention provides a device and a method for detecting and automatically breaking a dust collector ship-shaped ash bucket material bridge. The beneficial effects are as follows:
the device and the method for detecting and automatically breaking the bridge of the ship-shaped ash bucket of the dust remover can judge the ash blocking state and the ash blocking position of the ship-shaped ash bucket in real time, remind operators to take measures, and complete the breaking of the bridge of the ash bucket in an automatic or manual operation mode. The mechanical vibration ash removal commonly used by the ash bucket is canceled, and the ash bucket has positive effects on maintaining the structural strength of the ash bucket and preventing welding seams from cracking caused by vibration of the wall plates. The walking type ash removing process is adopted, the ash removing process is controllable, the ash can directly reach the center of the material bridge, and no dead angle exists in ash removing. The mode that the ash removal adopts the nozzle to sweep and adds the end cap to disclose the ash to combine together loosens the material bridge from three direction, and the ash removal scope is wide, and the nozzle adopts venturi to accelerate nitrogen gas, and the ash removal power is big. The ash cleaning efficiency is improved. The nitrogen is adopted to replace compressed air, so that gas expansion and temperature reduction in the ash removal process are prevented, and dew condensation hardening of the desulfurized ash is caused. Ensuring the normal fluidity of the desulfurization ash.
Drawings
FIG. 1 is a schematic diagram of the structure of the present invention;
FIG. 2 is an enlarged schematic view of the invention at A;
FIG. 3 is an enlarged schematic view of the present invention at I;
fig. 4 is a schematic structural diagram of a side view of the present invention.
In the figure: 1: dust hopper of dust remover; 2: an inner stay; 3: a pressure sensor; 4: an electro-hydraulic push rod; 5: a spiral hose; 6: a pulse valve; 7: a steam drum; 8: an ash bucket fluidization chute; 9: a powder flow rate regulating valve; 10: a powder flowmeter; 11: a chute; 12: a return chute; 13: ash removal plug 14: an ash removal spray gun; 15: and (5) an air filling cavity.
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.
Referring to fig. 1-4, the present invention provides a technical solution: the utility model provides a dust remover ship-shaped ash bucket material bridge detects and automatic bridge breaking device, including dust remover ash bucket 1, dust remover ash bucket 1's one side has set gradually pressure sensor 3 and electrohydraulic push rod 4 from top to bottom, is provided with interior vaulting pole 2 in the dust remover ash bucket 1, and dust remover ash bucket 1's below is provided with ash bucket fluidization chute 8, and ash bucket fluidization chute 8's below is provided with powder flow control valve 9, and powder flow control valve 9's below is provided with powder flowmeter 10, and powder flowmeter 10's below is provided with elephant trunk 11, and elephant trunk 11's below is provided with returning chute 12;
the spiral hose 5, the pulse valve 6 and the steam drum 7 are sequentially arranged below the electro-hydraulic push rod 4 from top to bottom, and the ash removal plug 13, the ash removal spray gun 14 and the inflation cavity 15 which are mutually matched are arranged on the right side of the electro-hydraulic push rod 4;
the electro-hydraulic push rod 4, the spiral hose 5, the pulse valve 6, the steam drum 7, the ash removal plug 13, the ash removal spray gun 14 and the inflation cavity 15 form a walking type bridge breaking system;
the pressure sensor 3 is arranged on a long-side wall plate of the dust hopper 1 of the dust remover, a plurality of rows of pressure sensors are sequentially arranged from top to bottom, the horizontal distance is 3.8-5 meters, the vertical distance is 2.2-3.4 meters, and the pressure measuring range of the sensors is-4000 Pa to +2000Pa. The pressure sensor pressure taking port is provided with a nitrogen purging device;
the electro-hydraulic push rod 4 is arranged on a long-side wall plate of the dust catcher ash bucket 1, the installation height is 1/2-1/3 of the ash bucket height, the electro-hydraulic push rod is sequentially arranged along the length direction from the bottom of the dust catcher ash bucket 1, and the transverse interval is 2.4-3.6 meters;
the steam drum 7 is a nitrogen drum with pressure of 0.4-0.6MPa and volume of 0.08-0.12m 3 ；
The electro-hydraulic push rod 4 is a DG-B type electro-hydraulic push rod, the rated thrust is 6.86KN-9.8KN, the rated stroke of the electro-hydraulic push rod is 0.8-1 meter, a photoelectric switch is arranged at the half stroke position of the push rod, and an electric control system acquires a push rod position signal;
the ash removal spray gun 14 is arranged back to back along the horizontal direction by taking the inflation cavity 15 as the center, the spray gun adopts venturi tube acceleration, the flow rate of an inlet section is 30-50m/s, the flow rate of a throat opening is 80-110m/s, the angle of the inlet section is 40-55 degrees, the angle of an outlet section is 20-30 degrees, and the diameters of the inlet and the outlet are the same;
the ash removing plug 13 is arranged at the front end of the electro-hydraulic push rod 4, the width of the ash removing plug is 20 mm, the outlet end of the spray gun extends out, the length of the cone section is 0.2-0.3 m, and the angle of the cone section is 22-38 degrees. The length of the plug to cover the inflation cavity 15;
the construction method of the dust remover ship-shaped ash bucket bridge detection and automatic bridge breaking device comprises the following specific operations:
when the powder hopper is installed, an ash hopper fluidization chute, an air charging box, a powder flow regulating valve, a chute, a powder flowmeter and a return fluidization chute are sequentially installed from the bottom of the ash hopper;
the powder flow regulating valve has a conveying amount which is 1.2-1.3 times of the powder collecting amount of the dust hopper of the dust remover, and the valve opening control and valve position display adopt standard analog quantity signals of 4-20 mA;
the measuring range of the powder flowmeter is 1.2-1.3 times of the powder collecting amount of the dust hopper of the dust remover, and the flowmeter adopts standard 4-20 mA analog output;
the computer programs, sets the alarm range of ash bucket, monitors the pressure measurement signal of pressure sensor, when the ash passes through the pressure measuring tube, the pressure of pressure sensor rises from negative pressure to near atmospheric pressure greater than-500 Pa. The pressure sensor alarms, and the color changes from gray to red, so that the phenomenon of blocking ash in the area is indicated.
The computer programs, under the normal ash conveying condition, the opening of the flow regulating valve takes 20% as a first gear, 5 gears are set, and the powder flow corresponding to each gear is calibrated. The compiled form is input to a computer for standby.
The computer monitors the ash conveying process of the ship-shaped ash bucket of the dust remover in real time, and when the ash conveying amount corresponding to the opening of the flow valve is reduced by more than 50% compared with the calibration value and the ash blocking alarm occurs to the ash bucket sensor of the dust remover, the formation of a material bridge inside the ship-shaped ash bucket is indicated.
The walking type bridge breaking system automatically acts, a pulse valve blows, nitrogen is blown out from a spray gun to purge peripheral ash blocking, then an electro-hydraulic push rod stretches out, an ash removing plug is inserted into the middle position of a material bridge, the pulse valve blows to purge the peripheral ash blocking, then the electro-hydraulic push rod continues to advance, the ash removing plug is inserted into three quarters of an ash bucket, the pulse valve blows to purge the peripheral ash blocking, the electro-hydraulic push rod retracts to the initial position, and a pressure sensor measures the ash mouth to be purged with nitrogen. After one flow is completed, the structure of the hopper bridge is destroyed, and the bridge collapses. And sequentially actuating a bridge breaking system near the alarm area of the pressure sensor to complete the bridge breaking process of the whole ship-shaped ash bucket.
Examples:
example 1
The implementation provides a dust remover ship-type ash bucket material bridge detection and automatic bridge breaking device, which is applied to a dust remover ash bucket of a 350-ten-thousand-ton belt type roasting machine pellet flue gas desulfurization of a certain steel mill, and the volume of a single ship-type ash bucket is 470 cubic meters. Size of the upper surface of the ash bucket: 15.6 m.times.7.8 m, ash bucket bottom dimensions: 8.3 m.times.0.6 m, and the ash bucket height 7.7 m. The normal ash conveying amount of the ash bucket is 230 tons/hour. As shown in figure 1, the dust collector comprises a dust hopper of a dust collector ship type, an inner stay bar, a pressure sensor, a walking type bridge breaking system and a dust conveying and blanking detection device.
The pressure sensors are arranged on the long-side wall plate of the ash bucket, a plurality of rows of pressure sensors are sequentially arranged from top to bottom, the horizontal spacing is 4.8 meters, and the vertical spacing is 2.7 meters. The sensor setting range is-4000 Pa-0Pa. The pressure sensor pressure taking port is provided with a nitrogen purging device.
The walking type bridge breaking system is arranged on a long-side wall plate of the ash bucket, and the installation height is 2.9 meters (calculated from the bottom of the ash bucket). Are sequentially arranged along the length direction, and the transverse distance is 3.3 meters.
The walking bridge breaking system consists of an electrohydraulic push rod, a dust removing plug, an inflating cavity, a dust removing spray gun, a spiral hose, a pulse valve and a nitrogen bag. Nitrogen bag volume 0.12m 3 The nitrogen bag pressure was 0.5MPa.
The electro-hydraulic push rod is DG-B type electro-hydraulic push rod, the rated thrust is 9.8KN, the rated stroke of the electro-hydraulic push rod is 1 meter, the push rod is provided with a photoelectric switch at the half-stroke position, and an electric control system acquires a push rod position signal.
The ash removing spray gun is arranged back to back in the horizontal direction by taking the air filling cavity as the center, the spray gun adopts a venturi tube for acceleration, the flow speed of an inlet section is 45m/s, the flow speed of a throat opening is 100m/s, the angle of the inlet section is 45 degrees, the angle of an outlet section is 22 degrees, and the diameters of an inlet and an outlet are 80 millimeters.
The ash removing plug is arranged at the front end of the electro-hydraulic push rod, the width of the ash removing plug is 20 mm, the outlet end of the spray gun extends out, the length of the cone section is 0.25 m, and the angle of the cone section is 36 degrees. The length of the plug is suitable for covering the inflatable ball.
The ash conveying and blanking detection device is provided with an ash bucket fluidization chute, an air charging box, a powder flow regulating valve, a chute, a powder flowmeter and a return fluidization chute in sequence from the bottom of the ash bucket.
The powder flow regulating valve has conveying amount 1.2 times that of the dust collecting hopper, and the valve opening is controlled and the valve position is shown in 4-20 mA standard analog signal.
The measuring range of the powder flowmeter is 1.2 times of the powder collecting amount of the dust hopper of the dust remover, and the flowmeter adopts standard 4-20 mA analog output.
Example 2
The embodiment is applied to the use method of the automatic bridge breaking device for detecting the ash bucket bridge of the pellet flue gas desulfurization dust remover of the 350 ten thousand ton belt type roasting machine in a certain steel mill.
The computer programs, sets the alarm range of ash bucket, monitors the pressure measurement signal of pressure sensor, when the ash is over the pressure measuring tube, the pressure of pressure sensor is increased, from negative pressure to near atmospheric pressure (more than-500 Pa). The pressure sensor alarms, and the color changes from gray to red, so that the phenomenon of blocking ash in the area is indicated.
The computer programs, under the normal ash conveying condition, the opening of the flow regulating valve takes 20% as a first gear, 5 gears are set, and the powder flow corresponding to each gear is calibrated. The compiled form is input to a computer for standby.
The computer monitors the ash conveying process of the ship-shaped ash bucket of the dust remover in real time, and when the ash conveying amount corresponding to the opening of the flow valve is reduced by more than 50% compared with the calibration value and the ash blocking alarm occurs to the ash bucket sensor of the dust remover, the formation of a material bridge inside the ship-shaped ash bucket is indicated.
The walking type bridge breaking system automatically acts, a pulse valve blows, nitrogen is blown out from a spray gun to purge peripheral ash blocking, then an electro-hydraulic push rod stretches out, an ash removing plug is inserted into the middle position of an ash bucket, the pulse valve blows to purge the peripheral ash blocking, then the electro-hydraulic push rod continues to advance, the ash removing plug is inserted into the three-fourths position of the ash bucket, the pulse valve blows to purge the peripheral ash blocking, the electro-hydraulic push rod retracts to the initial position, and a pressure sensor measures the ash mouth to be purged with nitrogen. After one flow is completed, the structure of the hopper bridge is destroyed, and the bridge collapses. The bridge breaking system near the alarm area of the pressure sensor is sequentially operated to complete the bridge breaking process of the whole ship-shaped ash bucket
In summary, the device and the method for detecting and automatically breaking the bridge of the ship-shaped ash bucket of the dust remover can judge the ash blocking state and the ash blocking position of the ship-shaped ash bucket in real time, remind operators to take measures, and complete the breaking of the bridge of the ash bucket in an automatic or manual operation mode. The mechanical vibration ash removal commonly used by the ash bucket is canceled, and the ash bucket has positive effects on maintaining the structural strength of the ash bucket and preventing welding seams from cracking caused by vibration of the wall plates. The walking type ash removing process is adopted, the ash removing process is controllable, the ash can directly reach the center of the material bridge, and no dead angle exists in ash removing. The mode that the ash removal adopts the nozzle to sweep and adds the end cap to disclose the ash to combine together loosens the material bridge from three direction, and the ash removal scope is wide, and the nozzle adopts venturi to accelerate nitrogen gas, and the ash removal power is big. The ash cleaning efficiency is improved. The nitrogen is adopted to replace compressed air, so that gas expansion and temperature reduction in the ash removal process are prevented, and dew condensation hardening of the desulfurized ash is caused. Ensuring the normal fluidity of the desulfurization ash.
It is noted that relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
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 (8)

1. The utility model provides a dust remover ship type ash bucket material bridge detects and automatic bridge breaking device which characterized in that: the dust remover comprises a dust remover ash bucket (1), wherein a pressure sensor (3) and an electro-hydraulic push rod (4) are sequentially arranged on one side of the dust remover ash bucket (1) from top to bottom, an inner supporting rod (2) is arranged in the dust remover ash bucket (1), an ash bucket fluidization chute (8) is arranged below the dust remover ash bucket (1), a powder flow regulating valve (9) is arranged below the ash bucket fluidization chute (8), a powder flowmeter (10) is arranged below the powder flow regulating valve (9), a chute (11) is arranged below the powder flowmeter (10), and a return chute (12) is arranged below the chute (11);
a spiral hose (5), a pulse valve (6) and a steam drum (7) are sequentially arranged below the electro-hydraulic push rod (4) from top to bottom, and an ash removal plug (13), an ash removal spray gun (14) and an inflation cavity (15) which are mutually matched are arranged on the right side of the electro-hydraulic push rod (4);
the walking type bridge breaking system is composed of an electrohydraulic push rod (4), a spiral hose (5), a pulse valve (6), a steam drum (7), a dust removing plug (13), a dust removing spray gun (14) and an inflation cavity (15).
2. The dust remover ship-shaped ash bucket bridge detection and automatic bridge breaking device as set forth in claim 1, wherein: the pressure sensor (3) is arranged on a long-side wall plate of the dust hopper (1), a plurality of rows of pressure sensors are sequentially arranged from top to bottom, the horizontal distance is 3.8-5 meters, the vertical distance is 2.2-3.4 meters, and the pressure measuring range of the sensors is-4000 Pa-2000 Pa. The pressure sensor pressure taking port is provided with a nitrogen purging device.
3. The dust remover ship-shaped ash bucket bridge detection and automatic bridge breaking device as set forth in claim 1, wherein: the electro-hydraulic push rod (4) is arranged on a long-side wall plate of the dust catcher ash bucket (1), the installation height is 1/2-1/3 of the ash bucket height, the electro-hydraulic push rod is sequentially arranged along the length direction from the bottom of the dust catcher ash bucket (1), and the transverse distance is 2.4 meters to 3.6 meters.
4. The dust remover ship-shaped ash bucket bridge detection and automatic bridge breaking device as set forth in claim 1, wherein: the steam drum (7) is a nitrogen drum, the pressure is 0.4-0.6MPa, and the volume is 0.08-0.12m 3 。
5. The dust remover ship-shaped ash bucket bridge detection and automatic bridge breaking device as set forth in claim 1, wherein: the electro-hydraulic push rod (4) is a DG-B type electro-hydraulic push rod, the rated thrust is 6.86KN-9.8KN, the rated stroke of the electro-hydraulic push rod is 0.8-1 meter, a photoelectric switch is arranged at the half-stroke position of the push rod, and an electric control system acquires a push rod position signal.
6. The dust remover ship-shaped ash bucket bridge detection and automatic bridge breaking device as set forth in claim 1, wherein: the ash removal spray gun (14) is arranged back to back along the horizontal direction by taking the air filling cavity (15) as the center, the spray gun adopts venturi tube acceleration, the flow speed of an inlet section is 30-50m/s, the flow speed of a throat opening is 80-110m/s, the angle of the inlet section is 40-55 degrees, the angle of an outlet section is 20-30 degrees, and the diameters of an inlet and an outlet are the same.
7. The dust remover ship-shaped ash bucket bridge detection and automatic bridge breaking device as set forth in claim 1, wherein: the ash removing plug (13) is arranged at the front end of the electro-hydraulic push rod (4), the width of the ash removing plug is 20 mm, the outlet end of the spray gun extends out, the length of the cone section is 0.2-0.3 m, and the angle of the cone section is 22-38 degrees. The plug is of a length to cover the inflation cavity (15).
8. A construction method of a dust collector ship type ash bucket bridge detection and automatic bridge breaking device is characterized by comprising the following steps: the ship-shaped ash bucket bridge detection and automatic bridge breaking device comprising the dust remover disclosed in claim 1 comprises the following specific operations:
when the powder hopper is installed, an ash hopper fluidization chute, an air charging box, a powder flow regulating valve, a chute, a powder flowmeter and a return fluidization chute are sequentially installed from the bottom of the ash hopper;
the powder flow regulating valve has a conveying amount which is 1.2-1.3 times of the powder collecting amount of the dust hopper of the dust remover, and the valve opening control and valve position display adopt standard analog quantity signals of 4-20 mA;
the measuring range of the powder flowmeter is 1.2-1.3 times of the powder collecting amount of the dust hopper of the dust remover, and the flowmeter adopts standard 4-20 mA analog output;
the computer programs, sets the alarm range of ash bucket, monitors the pressure measurement signal of pressure sensor, when the ash is over the pressure measuring tube, the pressure of pressure sensor is increased, from negative pressure to near atmospheric pressure (more than-500 Pa). The pressure sensor alarms, and the color changes from gray to red, so that the phenomenon of blocking ash in the area is indicated.
The computer programs, under the normal ash conveying condition, the opening of the flow regulating valve takes 20% as a first gear, 5 gears are set, and the powder flow corresponding to each gear is calibrated. The compiled form is input to a computer for standby.
The computer monitors the ash conveying process of the ship-shaped ash bucket of the dust remover in real time, and when the ash conveying amount corresponding to the opening of the flow valve is reduced by more than 50% compared with the calibration value and the ash blocking alarm occurs to the ash bucket sensor of the dust remover, the formation of a material bridge inside the ship-shaped ash bucket is indicated.
The walking type bridge breaking system automatically acts, a pulse valve blows, nitrogen is blown out from a spray gun to purge peripheral ash blocking, then an electro-hydraulic push rod stretches out, an ash removing plug is inserted into the middle position of a material bridge, the pulse valve blows to purge the peripheral ash blocking, then the electro-hydraulic push rod continues to advance, the ash removing plug is inserted into three quarters of an ash bucket, the pulse valve blows to purge the peripheral ash blocking, the electro-hydraulic push rod retracts to the initial position, and a pressure sensor measures the ash mouth to be purged with nitrogen. After one flow is completed, the structure of the hopper bridge is destroyed, and the bridge collapses. And sequentially actuating a bridge breaking system near the alarm area of the pressure sensor to complete the bridge breaking process of the whole ship-shaped ash bucket.
CN202311540730.6A 2023-11-20 2023-11-20 Dust remover ship-shaped ash bucket bridge detection and automatic bridge breaking device and method Pending CN117599536A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202311540730.6A CN117599536A (en) 2023-11-20 2023-11-20 Dust remover ship-shaped ash bucket bridge detection and automatic bridge breaking device and method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202311540730.6A CN117599536A (en) 2023-11-20 2023-11-20 Dust remover ship-shaped ash bucket bridge detection and automatic bridge breaking device and method

Publications (1)

Publication Number Publication Date
CN117599536A true CN117599536A (en) 2024-02-27

Family

ID=89947337

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202311540730.6A Pending CN117599536A (en) 2023-11-20 2023-11-20 Dust remover ship-shaped ash bucket bridge detection and automatic bridge breaking device and method

Country Status (1)

Country Link
CN (1) CN117599536A (en)

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