CN111999113A - Coal as fired sampling machine and energy-saving operation method thereof - Google Patents
Coal as fired sampling machine and energy-saving operation method thereof Download PDFInfo
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- CN111999113A CN111999113A CN202010813475.8A CN202010813475A CN111999113A CN 111999113 A CN111999113 A CN 111999113A CN 202010813475 A CN202010813475 A CN 202010813475A CN 111999113 A CN111999113 A CN 111999113A
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- 238000005070 sampling Methods 0.000 title claims abstract description 172
- 239000003245 coal Substances 0.000 title claims abstract description 68
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- 239000002699 waste material Substances 0.000 claims description 15
- 230000009467 reduction Effects 0.000 claims description 14
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- 229910000746 Structural steel Inorganic materials 0.000 claims description 4
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- 230000005540 biological transmission Effects 0.000 claims description 4
- 238000007599 discharging Methods 0.000 claims description 4
- 238000000926 separation method Methods 0.000 claims description 4
- 229910000851 Alloy steel Inorganic materials 0.000 claims description 3
- 229910000831 Steel Inorganic materials 0.000 claims description 3
- 238000007689 inspection Methods 0.000 claims description 3
- 238000007789 sealing Methods 0.000 claims description 3
- 239000010959 steel Substances 0.000 claims description 3
- 238000003466 welding Methods 0.000 claims description 3
- 230000008859 change Effects 0.000 claims description 2
- 238000005096 rolling process Methods 0.000 description 4
- 239000003638 chemical reducing agent Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000005520 cutting process Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
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- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
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- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/02—Devices for withdrawing samples
- G01N1/10—Devices for withdrawing samples in the liquid or fluent state
- G01N1/12—Dippers; Dredgers
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/02—Devices for withdrawing samples
- G01N1/10—Devices for withdrawing samples in the liquid or fluent state
- G01N1/18—Devices for withdrawing samples in the liquid or fluent state with provision for splitting samples into portions
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/02—Devices for withdrawing samples
- G01N1/10—Devices for withdrawing samples in the liquid or fluent state
- G01N1/20—Devices for withdrawing samples in the liquid or fluent state for flowing or falling materials
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
- G01N1/286—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q involving mechanical work, e.g. chopping, disintegrating, compacting, homogenising
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- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B19/00—Programme-control systems
- G05B19/02—Programme-control systems electric
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- G05B19/042—Programme control other than numerical control, i.e. in sequence controllers or logic controllers using digital processors
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/02—Devices for withdrawing samples
- G01N1/10—Devices for withdrawing samples in the liquid or fluent state
- G01N1/20—Devices for withdrawing samples in the liquid or fluent state for flowing or falling materials
- G01N2001/2007—Flow conveyors
- G01N2001/2028—Belts
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
- G01N1/286—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q involving mechanical work, e.g. chopping, disintegrating, compacting, homogenising
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Abstract
The invention provides a coal as fired sampling machine, comprising: the sampling control system is used for sectionally disassembling the operation process of the coal as fired sampling machine according to requirements, redefining the operation mode of the coal as fired sampling machine, and adopting different operation modes by the mechanized sampler in different sampling processes, so that the operation time of the coal as fired sampling machine is reduced and the electric energy consumption of the coal as fired sampling machine is reduced; the mechanical sampler is a sampling head, and the sample preparation system comprises a primary feeder, a crusher, a divider, a material abandoning machine, a collecting bucket, a secondary feeder and an electrical control device. The operation process of the coal as fired sampling machine is divided again, each sampling head is counted as a sampling process, each sampling process is divided into three stages of judgment, material existence and material waiting, and then the high-efficiency energy-saving operation of the coal as fired sampling machine is realized.
Description
Technical Field
The invention relates to the technical field of thermal automation of thermal power plants, in particular to a coal as fired sampling machine and an energy-saving operation method thereof, which can be applied to a control program of the coal as fired sampling machine of a thermal power plant.
Background
The existing coal as fired sampling machine operates automatically along with the starting of a coal conveying belt, all devices are in an operating state, a sampling head samples according to a fixed interval, but in each sampling interval, a large amount of idle time exists in the sampling machine, and the situation of electric energy waste exists. Generally, the energy-saving mode of the coal as fired sampling machine adopted in the prior art is to close the crusher to realize a certain energy-saving effect, specifically, only the first feeding machine and the crusher are stopped limitedly, the second feeding machine and the waste belt are still in operation, and a large amount of power loss still exists in the whole sampling process.
Disclosure of Invention
In order to overcome the problems in the prior art, the invention aims to provide a coal as fired sampling machine and an energy-saving operation method thereof, which realize the high-efficiency and energy-saving operation of the coal as fired sampling machine on the premise of not changing the sampling result and the sampling scheme.
The invention aims to provide a coal as fired sampling machine, which comprises: the sampling control system is used for sectionally disassembling the operation process of the fired coal sampling machine according to requirements, redefining the operation mode of the fired coal sampling machine, and adopting different operation modes by the mechanical sampler in different sampling processes, so that the operation time of the fired coal sampling machine is reduced and the electric energy consumption of the fired coal sampling machine is reduced; the mechanical sampler is a sampling head, and the sample preparation system comprises a primary feeder, a crusher, a divider, a material abandoning machine, a collecting bucket, a secondary feeder and an electrical control device.
Preferably, the sampling head is provided with an alloy steel scraper knife and is installed at the head of the belt conveyor, full-section sampling is carried out from the head of the conveying belt, during work, the scraper head of the scraper knife is driven by a motor to rotate, a sub-sample is collected at a certain time interval, a scraper at the rear part of the scraper head ensures that the collected sub-sample completely enters a chute, the sub-sample enters a primary feeder along the chute, and then the primary feeder continuously and uniformly conveys the sub-sample to a crusher, the crusher is crushed according to the specified granularity requirement, the crushed material passes through a divider to form an analysis sample and a remainder part, the analysis sample falls into a collecting barrel for a laboratory, and the remainder after division is conveyed to a next-level belt by a screw part of the divider, so that the whole sampling process is completed.
Preferably, the sampling head is driven by an electric gear box, and the sampling head is made of low-alloy structural steel.
Preferably, the primary feeder and the material abandoning machine are screw feeders and comprise a driving device, a feeding device, a head section, a middle section, a tail section, a discharging device and a base, the cross section of the screw feeder is small in external dimension and can be used in an inclined mode, the maximum inclination angle is not more than 200, the temperature of a working environment is-200-500 ℃, the temperature of conveyed materials is not more than 2000 ℃, the diameter of the screw feeder is divided into phi 168 and phi 244, each diameter specification has ten standard rotating speeds which are respectively 20, 30, 35, 45, 60, 75, 90, 120, 150 and 190 revolutions per minute, the length of the screw feeder is 1-8 m, and every 0.3m is one length specification, and an inspection hole is formed in the shell of the screw feeder and used for clearing siltation and blockage generated after shutdown.
Preferably, the crusher is a hammer crusher and is used for intermittently and continuously crushing coal samples, a ring hammer made of wear-resistant materials is arranged at the head of the crusher and is dynamically balanced, so that the crusher is directly driven, side sealing plates which are quickly opened are arranged on the side face of the crusher, the crusher is convenient to clean and maintain, a cavity of the crusher is of a feeder forced feeding type and is used for solving the problem that wet coal is accumulated to block an opening, the screw feeder stops air flow through the crusher to reduce water loss, the crusher is provided with a plurality of mutually spaced sieve bars, and the gap and the rotation speed of the sieve bars are adjusted, so that the size of discharged materials is changed.
Preferably, the division ware comprises motor, reduction gear, division rotary drum, connects hopper, revolving axle and organism, the reduction gear is the spur gear two-stage speed reduction, hollow shaft formula transmission moment of torsion, flange formula mounting means, the division rotary drum comprises the steel sheet welding of 3mm thick, installs adjustable hopper mouth on it for the adjustment divides the ratio, the revolving axle is the cavity square, one end with the center pin connection of reduction gear for the drive of this axle, open on the four sides of middle part square chest has the square hole, is used for the fixed mounting of division rotary drum, install 1-4 division material mouths on the division rotary drum for carry out the regulation of dividing the ratio, it is the welded pipe to connect the hopper for the output of sample after the division.
Preferably, the secondary feeder is arranged in front of the divider and used for conveying the coal crushed by the crusher, one part of the coal is collected by the divider, the other part of the residual material enters the bucket elevator and is conveyed to the belt, and the bucket elevator is used for conveying the coal sample which is not collected by the divider back to the belt.
The invention also aims to provide an energy-saving operation method of the coal as fired sampling machine, and the control mode of the energy-saving operation method is divided into an automatic mode and a manual mode:
1. automatic mode
A. Automatic on site: turning the change-over switch to 'automatic' or 'on site', selecting a sampling time interval ( time 1, 2, 3, 4); pressing down a 'system start' key; pressing 'system stop' when the sampling is finished;
B. remote automatic: switching the change-over switch to automatic control and remote control, and selecting sampling time intervals ( time 1, 2, 3 and 4); then, the start and stop of the sampling machine are operated by the program control chamber;
2. manual mode
A. The change-over switch is turned to manual or local;
B. turning a coal-feeding furnace sampling device to an empty barrel position, and starting a bucket elevator, a secondary feeder, a crusher and a primary feeder after the sampling device is turned on in sequence;
C. starting a sampling head, ensuring that the time interval between two starts is not 2 minutes at least so as to avoid blockage of a crusher, then starting the division device, and closing the division device after no material exists in a secondary feeder;
D. and after sampling is finished, stopping the sampling head, the primary feeder, the crusher, the secondary feeder and the bucket elevator at present.
Preferably, the operation process of the coal as fired sampling machine is divided again in an automatic mode and a manual mode, each sampling head is counted as a sampling process, and each sampling process is divided into three stages:
the first stage, judging stage: taking the action of the sampling head extending to the position as a time interval, entering the judging stage, starting the primary feeder at the moment, starting furnace separation sampling judgment of the coal as fired sampling machine, and stopping the primary feeder 5s after the sampling head retracts to the position;
the second stage, material stage: after the furnace division sampling judgment is finished, the collecting barrel enters the material stage after the barrel rotating of the collecting barrel is finished, the waste material belt, the secondary feeder, the crusher and the primary feeder of the waste material machine are started at the moment, and the division device starts the division process after division delay;
and a third stage: a material waiting stage: after the division process is finished, entering the material waiting stage after waiting for 5 seconds, stopping the primary feeder, the crusher and the secondary feeder, and stopping the waste belt of the waste feeder after waiting for 5 seconds;
the sampling head acts again to start a new sampling process.
Preferably, the sampling head action interval, the sub-furnace sampling judgment time and the barrel rotating process of the sub-furnace sampling judgment can be designed according to the original program, and the division delay is adjusted according to different field conditions.
The invention has the beneficial effects that:
the operation process of the sampling machine is segmented and disassembled according to requirements, and sampling equipment adopts different operation modes in different sampling processes, so that the high-efficiency energy-saving operation of the coal as fired sampling machine is realized. The operation intervals of the sampling head and the splitter are not changed, so that the problem of electric energy waste caused by idling of the coal as fired sampling machine is thoroughly solved on the premise of not changing the coal sample density, and the operating programs of the sampling machine are not conflicted in the process of starting different sampling devices in sections through section processing of the sampling process. Compared with other operation modes of the sampling machine, the invention has the advantages of more excellent energy-saving effect, strong program expansion and convenience for subsequent maintenance personnel to further optimize and update the program.
Drawings
FIG. 1 is a schematic structural diagram of a coal as fired sampling machine according to an embodiment of the invention;
FIG. 2 is a schematic structural diagram of a screw feeder according to an embodiment of the invention;
fig. 3 is a flow chart of an energy-saving operation method according to an embodiment of the present invention.
Detailed Description
The following detailed description of the embodiments of the present invention is provided with reference to the accompanying drawings, but the present invention is not limited thereto.
The coal as fired sampling machine of the embodiment with reference to fig. 1 comprises: the system comprises a mechanical sampler, a sample preparation system and a sampling control system, wherein the barrel sampling control system is used for sectionally disassembling the operation process of the barrel coal-as-fired sampling machine according to requirements, redefining the operation mode of the barrel coal-as-fired sampling machine, and adopting different operation modes by the inner barrel mechanical sampler in different sampling processes, so that the operation time of the barrel coal-as-fired sampling machine is reduced and the electric energy consumption of the barrel coal-as-fired sampling machine is reduced; wherein the mechanized sample thief of bucket is 1 bucket of sampling head bucket, and bucket system appearance system includes 2 buckets of primary feeder bucket, 3 buckets of breaker bucket, 4 buckets of divider bucket, 5 buckets of abandon material machine bucket, 6 buckets of collecting vessel bucket, secondary feeder and electrical control device.
The barrel sampling head barrel 1 is provided with an alloy steel scraper knife and is arranged at the head part of the belt conveyor, and full-section sampling is carried out from the head part of the conveyor belt. The working process, the shovel head of the shovel blade is driven by the motor to rotate according to the programmed program, a sub sample is collected by rotating for a circle at regular intervals, the scraper at the rear part of the shovel head ensures that the collected sub sample completely enters the chute, the sub sample enters the primary feeder barrel 2 barrel along the chute, the sub sample is continuously and uniformly conveyed to the crusher barrel 3 barrel by the primary feeder barrel 2 barrel of the barrel, the barrel crusher barrel 3 barrel is crushed according to the specified granularity requirement, the crushed material is divided into an analysis sample and a remainder by the barrel divider barrel 4 barrel, the analysis sample of the barrel falls into the collection barrel 6 barrel for the laboratory, the remainder after division is conveyed to the next-stage belt by the screw part of the barrel divider barrel 5 barrel, and the whole sampling process is completed.
1 bucket of bucket sampling head bucket is the transmission of electronic gear box, sampling head top speed is 5.0 m/s, the sampling head opening is 150 millimeters, the quality of gathering the sample is 15kG, the maximum dimension of sampling sample is 50mm, the sampling head material is low alloy structural steel, sampling head cutting edge material is low alloy structural steel, it is bolted connection to connect the cutting edge mode, maximum sampling frequency is 12 times/hour, motor power is 5.5kw, the quantity of electrode is 4, the sampling head quality is 100 kilograms, conveyer belt width is 1200mm, conveyer belt speed is 2.5 m/s, conveying capacity is 380 tons/hour.
Referring to fig. 2, the barrel 2 of the barrel primary feeder adopts a spiral type, model BPC-11, and power is 1.1kw, and is used for horizontally conveying the coal sample collected by the sampling head to a coal crusher for crushing. The barrel primary feeder barrel 2 and the barrel waste feeder barrel 5 are screw feeders, and comprise a driving device barrel 7, a feeding device barrel 8, a head barrel 9, a middle barrel 10, a tail barrel 11, a discharging device barrel 12 and a basic barrel 13, the barrel screw feeder is a continuous conveying device, conveyed materials are pushed along a fixed machine shell by a rotating screw to be conveyed, the force of the materials, which does not rotate with a screw instrument, is the gravity of the materials and the friction force of the materials to the machine shell, the cross section of the screw feeder structure is small in size, middle unloading is conveniently carried out on a plurality of positions, more sealing is conveniently achieved by tightly closing a cover of the machine shell, the screw feeder can be obliquely used, the maximum inclination angle is not more than 200, the screw feeder is used for one-way transportation, operations such as mixing, stirring and the like are not suitable to be carried out simultaneously in the conveying process, and the working environment temperature of the screw feeder is between 200 ℃ below zero and 500 ℃, the temperature of the conveyed materials must not exceed 2000 ℃. The diameter of the screw machine is divided into phi 168 and phi 244, each diameter specification has ten standard rotating speeds which are respectively 20, 30, 35, 45, 60, 75, 90, 120, 150 and 190 revolutions per minute, the length of the screw machine is 1-8 m, every 0.3m is a length specification, the power of the screw machine for each diameter is changed according to different factors such as conveying amount, conveying length of conveyed materials, conveying height and the like, and an inspection hole is arranged on a shell of the barrel screw feeder and used for removing deposition and blockage after shutdown.
The 3 barrels of the barrel crusher are hammer crushers for intermittent and continuous crushing of coal samples, the crusher model adopted by the embodiment is MKF-75, the power is 11kw, the discharging granularity is less than 3mm, and when the coal sample water content is 14%, the crushing capacity is 5 tons/hour. Can be fast with the mineral breakage that the nominal size is 70mm into the product of 3-10mm size, 3 bucket heads of bucket breaker bucket set up the ring hammer of being made by wear-resistant material, bucket ring hammer is through dynamic balance, thereby make 3 buckets of bucket breaker bucket directly driven, 3 bucket sides of bucket breaker bucket set up the side seal board of opening fast, be convenient for clear up and maintain 3 buckets of bucket breaker bucket, the cavity of bucket breaker is batcher forced feeding type, a problem for solving the wet coal and piling up and jam the open-ended, bucket screw feeder has blockked that 3 buckets of bucket breaker bucket of air current flow through reduce moisture loss, 3 buckets of bucket breaker bucket have many mutual spaced grating, thereby the clearance of adjustment bucket grating and the size of the rotation rate change ejection of compact.
The barrel division device comprises a barrel 4 barrel, a barrel reduction device and a machine body, wherein the barrel speed reducer is a straight gear two-stage speed reducer, a hollow shaft type transmission torque is adopted, a flange type installation mode is adopted, the barrel reduction rolling barrel is formed by welding steel plates with the thickness of 3mm, an adjustable hopper opening is arranged on the barrel reduction rolling barrel and used for adjusting the division ratio, the barrel rotating shaft is hollow and square, one end of the barrel rotating shaft is connected with a central shaft of the barrel speed reducer and used for driving the shaft, square holes are formed in the four sides of a middle square cabinet and used for fixedly installing the reduction rolling barrel, 1-4 reduction material openings are arranged on the barrel reduction rolling barrel and used for adjusting the division ratio, and the barrel receiving hopper is a welded pipe and used for outputting samples after division. In this embodiment, the splitter model is BPC-11, the power is 0.37kw, and the splitting ratio is 1: 150.
set up bucket secondary feeder before the bucket divider for convey the broken coal of breaker, partly are taken away by the divider, and on another part clout got into bucket elevator and sent the belt, bucket elevator was used for sending back the coal sample that the divider was not gathered a conveyer of belt.
The full-moisture coal sample is taken by the sampler, and the obtained granularity is less than 13 mm. The working principle is as follows:
the collected materials vertically fall from a feeding port arranged on the collecting device and enter a cavity of a division device 4, a division drum rotates around a horizontal central shaft of the machine at a uniform speed to cut the falling materials, the cut materials enter a receiving hopper to become a part collected by division, and the rest materials directly fall from the feeding port to a discharge port to become waste materials.
Referring to fig. 3, in the energy-saving operation method of the coal as fired sampling machine according to the present embodiment, the control mode of the barrel energy-saving operation method is divided into an automatic mode and a manual mode:
1. automatic mode
A. Automatic on site: the change-over switch is switched to 'automatic' or 'on the spot', and the sampling time interval barrels of 1, 2, 3 and 4 are selected; pressing down a 'system start' key; pressing 'system stop' when the sampling is finished;
B. remote automatic: the change-over switch is switched to automatic control and remote control, and the sampling time interval barrels of 1, 2, 3 and 4 are selected; then, the start and stop of the sampling machine are operated by the program control chamber;
2. manual mode
A. The change-over switch is turned to manual or local;
B. turning a coal-feeding furnace sampling device to an empty barrel position, and starting a bucket elevator, a secondary feeder, a crusher barrel 3 and a primary feeder barrel 2 in sequence;
C. starting a sampling head barrel 1, ensuring that the time interval of two starting is not at least 2 minutes so as to avoid the blockage of a crusher, then starting a barrel divider barrel 4, and closing the barrel divider barrel 4 after the secondary feeder has no material;
D. after sampling, the sampling head barrel 1, the primary feeder barrel 2, the crusher barrel 3, the secondary feeder and the bucket elevator are stopped at the present back.
The operation process of the coal sampling machine with the barrel as the furnace is divided again in the automatic mode and the manual mode, 1 barrel of the sampling head barrel is counted as a sampling process each time, and the sampling process is divided into three stages each time:
the first stage, judging stage: taking the time interval that the sampling head moves to extend to the position as the time interval, entering a barrel judgment stage, starting a barrel 2 of a primary feeder at the moment, starting furnace separation sampling judgment of a coal sampling machine entering a barrel furnace, and stopping the barrel 2 of the primary feeder after the barrel 1 of the sampling head is retracted to the position for 5 s;
the second stage, material stage: after the sampling judgment of the barrel separation furnace is finished, after the barrel collection barrel 6 barrel is rotated, the barrel charging stage is started, at the moment, a barrel waste belt of a barrel waste machine barrel 5 barrel, a secondary feeder, a crusher barrel 3 barrel and a primary feeder barrel 2 barrel are started, and after the division delay, a barrel division device barrel 4 barrel starts the division process;
and a third stage: a material waiting stage: after the barrel division process is finished, entering a barrel material waiting stage after waiting for 5s, stopping the primary feeder barrel 2, the crusher barrel 3 and the secondary feeder, and stopping a barrel material abandoning belt of the barrel material abandoning barrel 5 after waiting for 5 s;
the sampling head barrel 1 acts again to start a new sampling process.
The sampling head barrel 1 barrel action interval, the furnace-dividing sampling judgment time and the barrel rotating process of the barrel furnace-dividing sampling judgment can be designed according to the original program, and the barrel division delay is adjusted according to different field conditions.
According to the embodiment, the operation process of the sampling machine is segmented and disassembled as required, and sampling equipment adopts different operation modes in different sampling processes, so that the high-efficiency energy-saving operation of the coal as fired sampling machine is realized. The operation intervals of the sampling head and the splitter are not changed, so that the problem of electric energy waste caused by idling of the coal as fired sampling machine is thoroughly solved on the premise of not changing the coal sample density, and the operating programs of the sampling machine are not conflicted in the process of starting different sampling devices in sections through section processing of the sampling process. Compared with other operation modes of the sampling machine, the energy-saving effect is more excellent, the program expansion is strong, and the program can be further optimized and updated by subsequent maintenance personnel conveniently
The technical solutions provided by the embodiments of the present invention are described in detail above, and the principles and embodiments of the present invention are explained herein by using specific examples, and the descriptions of the embodiments are only used to help understanding the principles of the embodiments of the present invention; meanwhile, the detailed description and the application scope of the embodiments according to the present invention may be changed by those skilled in the art, and in summary, the present disclosure should not be construed as limiting the present invention.
Claims (10)
1. A coal as fired sampling machine is characterized by comprising: the sampling control system is used for sectionally disassembling the operation process of the fired coal sampling machine according to requirements, redefining the operation mode of the fired coal sampling machine, and adopting different operation modes by the mechanical sampler in different sampling processes, so that the operation time of the fired coal sampling machine is reduced and the electric energy consumption of the fired coal sampling machine is reduced; the mechanical sampler is a sampling head (1), and the sample preparation system comprises a primary feeder (2), a crusher (3), a divider (4), a material abandoning machine (5), a collecting bucket (6), a secondary feeder and an electrical control device.
2. A coal as fired sampling machine as claimed in claim 1 wherein: the sampling head (1) is provided with an alloy steel scraper knife, is arranged at the head part of the belt conveyor and is used for sampling the full section from the head part of the belt conveyor, the shovel head of the shovel blade is driven by a motor to rotate, a sub-sample is collected by rotating for a circle at regular intervals, a scraper at the rear part of the shovel head ensures that the collected sub-sample completely enters a chute, the sub-sample enters a primary feeder (2) along the chute, and then the sub-sample is continuously and uniformly conveyed to a crusher (3) by the primary feeder (2), the crusher (3) crushes according to the specified granularity requirement, the crushed material is divided by the splitter (4) to form an analysis sample and a residual material, the analysis sample falls into collecting vessel (6), supplies the laboratory to use, and the clout after the division is by the screw machine part of abandon material machine (5) is carried next grade belt to accomplish whole sampling process.
3. A coal as fired sampling machine as claimed in claim 1 wherein: the sampling head (1) is driven by an electric gear box, and the sampling head is made of low-alloy structural steel.
4. A coal as fired sampling machine as claimed in claim 1 wherein: the primary feeder (2) and the waste feeder (5) are screw feeders and comprise a driving device (7), a feeding device (8), a head section (9), a middle section (10), a tail section (11), a discharging device (12) and a foundation (13), the cross section of the screw feeder is small in external dimension and can be used obliquely, the maximum inclination angle is not more than 200, the temperature of a working environment is-200-500 ℃, the temperature of conveyed materials is not more than 2000 ℃, the diameters of the screw feeders are phi 168 and phi 244, each diameter specification has ten standard rotating speeds which are respectively 20, 30, 35, 45, 60, 75, 90, 120, 150 and 190 revolutions per minute, the length of the screw feeder is 1-8 m, and every 0.3m is a length specification, and an inspection hole is arranged on the shell of the screw feeder, used for clearing away the silting blockage after shutdown.
5. A coal as fired sampling machine as claimed in claim 1 wherein: the crusher (3) is a hammer crusher and is used for intermittent and continuous crushing of coal samples, a ring hammer made of wear-resistant materials is arranged at the head of the crusher (3), the ring hammer is dynamically balanced, so that the crusher (3) is directly driven, a side sealing plate which is quickly opened is arranged on the side face of the crusher (3), the crusher (3) is convenient to clean and maintain, a cavity of the crusher is of a feeding machine forced feeding type and is used for solving the problem that wet coal is accumulated to block an opening, the spiral feeding machine blocks air flow to reduce moisture loss of the crusher (3), the crusher (3) is provided with a plurality of mutually spaced sieve bars, and the gap and the rotation speed of the sieve bars are adjusted so as to change the size of discharged materials.
6. A coal as fired sampling machine as claimed in claim 1 wherein: divide ware (4) by motor, reduction gear, division tumbling cylinder, connect hopper, revolving axle and organism to constitute, the reduction gear is the spur gear two-stage speed reduction, hollow shaft formula transmission moment of torsion, flange formula mounting means, the division tumbling cylinder comprises the steel sheet welding of 3mm thick, installs adjustable hopper mouth on it for the adjustment divides the ratio, the revolving axle is the cavity square, one end with the center pin connection of reduction gear for the drive of this axle, open on the four sides of middle part square chest has the square hole, is used for the fixed mounting of division tumbling cylinder, install 1-4 division material mouths on the division tumbling cylinder for carry out the regulation of dividing the ratio, it is the welded pipe to connect the hopper for the output of sample after the division.
7. A coal as fired sampling machine as claimed in claim 6 wherein: the secondary feeder is arranged in front of the divider and used for conveying the coal crushed by the crusher, one part of the coal is collected by the divider, the other part of the residual material enters the bucket elevator and is conveyed to the belt, and the bucket elevator is used for conveying the coal sample which is not collected by the divider back to the conveying device of the belt.
8. An energy-saving operation method of a coal-as-fired sampling machine according to claim 7, characterized in that the control mode of the energy-saving operation method is divided into an automatic mode and a manual mode:
1. automatic mode
A. Automatic on site: turning the change-over switch to 'automatic' or 'on site', selecting a sampling time interval (time 1, 2, 3, 4); pressing down a 'system start' key; pressing 'system stop' when the sampling is finished;
B. remote automatic: switching the change-over switch to automatic control and remote control, and selecting sampling time intervals (time 1, 2, 3 and 4); then, the start and stop of the sampling machine are operated by the program control chamber;
2. manual mode
A. The change-over switch is turned to manual or local;
B. the sampling device of the coal furnace is rotated to the position of an empty barrel, and the bucket elevator, the secondary feeder, the crusher (3) and the primary feeder (2) are started after the sampling device of the coal furnace is sequentially started;
C. starting the sampling head (1), ensuring that the time interval between two starts is not at least 2 minutes so as to avoid blockage of the crusher, then starting the divider (4), and closing the divider (4) after no material exists in the secondary feeder;
D. after sampling is finished, the sampling head (1), the primary feeder (2), the crusher (3), the secondary feeder and the bucket elevator are stopped at the present moment.
9. The method of claim 8, wherein: the operation process of the coal as fired sampling machine is divided again in an automatic mode and a manual mode, each sampling head (1) is counted dynamically as a sampling process, and each sampling process is divided into three stages:
the first stage, judging stage: the sampling head is moved to extend to the position as a time interval, the judging stage is started, the primary feeder (2) is started at the moment, the as-fired coal sampling machine starts furnace separation sampling judgment, and the primary feeder (2) stops 5s after the sampling head (1) is retracted to the position;
the second stage, material stage: after the furnace division sampling judgment is finished, the collecting barrel (6) enters the material stage after the barrel rotating is finished, the waste belt, the secondary feeder, the crusher (3) and the primary feeder (2) of the waste material machine (5) are started at the moment, and the division device (4) starts the division process after division delay;
and a third stage: a material waiting stage: after the division process is finished, entering the material waiting stage after waiting for 5 seconds, stopping the primary feeder (2), the crusher (3) and the secondary feeder, and stopping the material abandoning belt of the material abandoning machine (5) after waiting for 5 seconds;
the sampling head (1) acts again to start a new sampling process.
10. The method of claim 9, wherein: the action interval of the sampling head (1) for furnace-division sampling judgment, the furnace-division sampling judgment time and the barrel rotating process can be designed according to the original program, and the division delay is adjusted according to different field conditions.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202010813475.8A CN111999113A (en) | 2020-08-13 | 2020-08-13 | Coal as fired sampling machine and energy-saving operation method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010813475.8A CN111999113A (en) | 2020-08-13 | 2020-08-13 | Coal as fired sampling machine and energy-saving operation method thereof |
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| CN111999113A true CN111999113A (en) | 2020-11-27 |
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| CN202010813475.8A Pending CN111999113A (en) | 2020-08-13 | 2020-08-13 | Coal as fired sampling machine and energy-saving operation method thereof |
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Application publication date: 20201127 |