CN116159637A - Coal-water slurry processing device and method, coal-water slurry processing electric control system and control method - Google Patents

Abstract

The invention relates to a coal water slurry processing device and a processing method, and a coal water slurry processing electric control system and a control method. The coal water slurry processing device consists of an upper coal hopper, a hammer crusher assembly, a feeder, a ball mill and an electric cabinet which are sequentially connected into a production line through a conveying belt; the hammer crusher assembly comprises a base and a crushing assembly sleeved on the base. The pulverized coal crushing particle size is controllable, the discharging is not blocked, the weighing and proportioning continuous grinding production is automatically controlled, and the processing and preparation efficiency of the coal water slurry is high.

Description

Coal-water slurry processing device and method, coal-water slurry processing electric control system and control method

technical field

The invention belongs to the technical field of fuel, and in particular relates to a coal-water slurry processing device and a processing method, an electric control system and a control method for coal-water slurry processing.

Background technique

Coal water slurry is a coal-based fluid fuel that replaces oil. It is a low-pollution, high-efficiency, and pipeline-transportable slurry obtained through physical processing of about 65% coal, 34% water, and 1% additive. It not only maintains the original physical characteristics of coal, but also can be easily stored, pipelined and atomized like oil. At the same time, the combustion efficiency of coal water slurry can reach more than 95%, and the emission of sulfur dioxide and nitrogen oxides and smoke dust The concentration meets the requirements of environmental protection, and it is an ideal substitute for fuel oil. Therefore, coal water slurry is widely used. At present, the proportion of coal-water slurry used as a fuel for ceramic preparation in the building ceramics industry is not high, mainly because the automation of coal-water slurry processing equipment in ceramic enterprises is low, and manual control is routinely used for ingredients and water treatment. Due to the single processing method, workers work hard The task is heavy and cumbersome, resulting in unclear batching data records and high energy consumption. When large-scale continuous processing of coal-water slurry is required, this manual control of batching methods is inefficient and poor in production stability. Therefore, how to improve the automation of coal-water slurry processing, simplify the coal slurry processing process, and reduce the labor intensity of workers is imminent for ceramic enterprises to expand the application of coal-water slurry processing.

Contents of the invention

In order to overcome the deficiencies of the prior art, the purpose of the present invention is to provide a coal-water slurry processing system with controllable crushing particle size, no clogging of the discharge, automatic control of weighing and batching continuous grinding production, and high efficiency of coal-water slurry processing and preparation. Device and processing method, electric control system and control method for coal water slurry processing.

The technical solution of the present invention is the coal-water slurry processing device, which is special in that it is composed of a coal loading hopper, a hammer crusher assembly, a feeder, a ball mill, and an electric cabinet that are sequentially connected into a production line through a conveyor belt. ; The hammer crusher assembly includes a base and a crushing assembly set on the base.

As a preference: the crushing assembly includes a motor, a hammer shaft driven by the motor to rotate through a belt, a number of pulverized coal crushing hammers fixed on the hammer shaft, a sieve plate with a number of sieve gaps inside the hammer shaft, and the hammer head and The distance between the sieve plates is 1-5mm, which is convenient for pulverized coal to pass through; there is a cleaning plate under the sieve plate, which is installed on the mobile cleaning frame, and the two ends of the mobile cleaning frame and the two ends of the fixed bar are respectively equipped with sprockets , the cleaning motor is set at one end of the fixed bar, the output shaft of the cleaning motor is connected to the sprocket, and the chain on the sprocket is connected to the mobile cleaning frame, and several cleaning bars arranged at equal distances are installed above the moving cleaning plate, and the cleaning bars are aligned with the screen The sieve gap in the plate is equipped with a proximity switch for limit on the fixed bar, and the forward and reverse rotation of the cleaning motor is realized through two contactors. When the cleaning motor rotates clockwise, it touches the proximity switch installed on the right, and the cleaning motor stops. After a delay of T1, the cleaning motor rotates counterclockwise, and the chain moves to the left. After touching the proximity switch installed on the left side, the cleaning motor stops. In this way, the cleaning motor drives the chain to move the mobile cleaning frame left and right to realize the cleaning strip on the cleaning board. Clean the pulverized coal on the sieve gap of the sieve plate so that the hammer crusher does not block the pulverized coal.

As a preference: the feeder consists of a hopper, one end of the hopper runs through the screw mixer at the inner bottom of the hopper from the outside to the inside, the lower hopper is set at the bottom of the screw mixer outside the hopper, and the hopper bracket is used for weighing pulverized coal The feeder is composed of a weighing sensor for measurement, and the feeder is operated by a screw mixer to transport the pulverized coal from the hopper to the lower hopper, and the lower hopper evenly sprinkles the pulverized coal onto the conveyor belt.

As a preference: the ball mill is composed of a cylinder, the main motor of the ball mill connected by a belt, the pulp outlet of the cylinder is equipped with an electric valve connected to the slurry pool, and the inlet on the other side of the cylinder is provided with a belt connected to the conveyor belt. The feed hopper, the feed electric valve set at the junction of the feed hopper and the feed hopper, the pipeline electric valve connected to the upper end of the feed hopper in sequence through the pipeline, the flow meter and the chemical material that is connected to the chemical slurry tank at the other end The pipeline and the lower end of the feed hopper are composed of a tap water flowmeter connected in sequence, a pipeline electric valve, and a tap water pipeline connected to a water tank at the other end of the pipeline; the ball mill electromechanical cabinet is arranged on one side of the ball mill.

Another technical solution of the present invention is described coal-water slurry processing method, and its special feature is, comprises the following steps:

(1) The forklift shovels the coal into the upper coal hopper. After the upper coal hopper is full of materials, the equipment starts;

⑵Set the processing parameters on the touch screen of the system, the first conveyor belt transports the coal block to the hammer crusher for crushing, and breaks the coal block into powdered coal with a particle size of 2-5 mm, and the powdered coal passes through the sieve plate The sieve falls onto the second conveyor belt, and the second conveyor belt transports the pulverized coal to the feeder, and the cleaning bar under the sieve plate intermittently cleans the sieve gap;

(3) After the feeder is filled with pulverized coal, the screw mixer under the feeder starts, and the pulverized coal is sent to the third conveyor belt through the lower hopper, and the weighing sensor on the feeder measures the weight of the pulverized coal. When the pulverized coal weight reaches After setting the weight value, the feeder stops feeding;

(4) The pulverized coal is transported to the feeding hopper of the ball mill by the third conveying belt, and the chemical materials and tap water are respectively sent into the feeding hopper through the chemical material pipeline and the tap water pipeline. They are fed into the barrel of the ball mill together. When the chemical materials and tap water start to be transported, the flow meters of the chemical material pipeline and the tap water pipeline start to measure. When the chemical materials and tap water reach the set value, the electric feeding valve is closed to stop feeding;

⑸Start the main motor of the ball mill and start to rotate at a fixed frequency. When the accumulated rotation time reaches the set time, the ball mill will stop, and the alarm will remind the staff that the material has been ground and start to discharge the slurry. The coal-water slurry that has been ball-milled is transported to the slurry tank through the pipeline At this point, a working cycle is completed.

As a preference: when the hammer crusher in the step (2) is running, two contactors are set under the sieve plate to realize the forward and reverse rotation of the cleaning motor. When the cleaning motor rotates clockwise, it touches the proximity switch installed on the right side. , the cleaning motor stops, and after a delay of T1, the cleaning motor rotates counterclockwise, and the chain moves to the left. After touching the proximity switch installed on the left, the cleaning motor stops. The cleaning bar cleans the pulverized coal on the sieve gap of the sieve plate, effectively preventing the pulverized coal from clogging the gap of the sieve plate, and improving the sieving effect of the pulverized coal.

As a preference: the barrel of the ball mill in the step (5) is 12 meters, with a diameter of 2.38 meters, using low-cost silicon carbide balls as the medium, and the gradation of the balls is Φ30:Φ40:Φ50:Φ60=30%:30%:20 %: 20%, put 40 tons of ball stones before ball milling, and add Φ50 and Φ60 ball stones after each ball is ground. The standard for adding is to measure the height of the inner space of the ball mill. Stone supplement, the supplementary sky height is 2.3 meters;

As a preference: when the ball mill is grinding in the step (5), the addition ratio of its pulverized coal, ball stone, tap water and chemical materials is 36.7%: 29.4%: 33.8%: 0.1%, adding 50 tons of pulverized coal weight per ball, and adding 46 tons of water , add 150kg of chemicals, the ball milling time is 4.5 hours, the water content of the prepared coal-water slurry is 48%, the coal-water slurry passes through 200 meshes when it is balled out, and the sieve residue is controlled within 8.2%;

As a preference: an ultrasonic liquid level gauge is installed on the top of the slurry tank in the step (5), and when it is detected that the liquid level of the coal-water slurry entering the slurry tank is higher than the set height, an alarm device is triggered to remind the staff to pay attention.

Another technical solution of the present invention is the electric control system for coal-water slurry processing, which is special in that it is composed of electric cabinet, PLC, main circuit of ball mill motor, various sensors, electric valve, touch screen and configuration software. The electric cabinet is equipped with ball mill frequency converter, circuit breaker, intermediate relay, PLC and signal terminal block. PLC is the core of the whole electric control system. PLC communicates with touch screen and configuration software by RS232/RS485 respectively. , chemical material flowmeter, slurry tank ultrasonic flowmeter through RS485 communication, real-time reading of flow and liquid level data, real-time control of ball mills, feeders, conveyor belts; and collection of inverter, circuit breaker alarm information, timely intervention Device operating status.

As a preference: the main circuit of the ball mill motor is composed of a circuit breaker QF ₁ , a fuse FU ₁ , a frequency converter, and a motor, the circuit breaker terminal QF ₁ is connected to the main power supply, and the circuit breaker QF ₁ outlet terminal is connected to the fuse FU ₁ , The outlet terminal of fuse FU ₁ is connected to the R/S/T terminal of the frequency converter, and the U/V/W terminal of the frequency converter is connected to the terminal of the motor; the power of the motor is 315KW, and the frequency converter is a heavy-duty frequency converter; the STF/RL of the frequency converter The terminal is connected to the GND of the wire ground through the intermediate relay, and the PLC output controls the on/off of the intermediate relay to realize the start-stop/deceleration control of the inverter.

The fourth technical solution of the present invention is the control method of the electric control system for processing coal-water slurry, which is special in that it includes the following steps:

⑴Before the system starts, set various parameters on the touch screen, including the number of pulverized coal balls, weight of pulverized coal balls, weight of water added, weight of added chemicals, and running time of the ball mill. Press the start button on the touch screen to start the system. start booting;

(2) The screw mixer of the feeder starts to work and unload, and the conveyor belt also starts to run. The PLC reads the weight data t ₁ of the load cell on the feeder, and the PLC reads the real-time weight t ₂ of the load cell every 1 second. When t ₂ = 95% × t ₁ , the screw mixer starts to decelerate to achieve precise control of the pulverized coal weight of the ball mill, and when t ₂ = t ₁ , stop the screw mixer;

(3) When the screw mixer of the feeder starts to work, the electric valve of the chemical material pipeline on the ball mill is opened, and the PLC reads the data f ₁ of the chemical material flow meter, and the PLC retrieves the data f ₂ of the chemical material flow meter every 1 second. When f ₂ =95%×f ₁ , the pipeline electric valve is automatically closed to achieve precise control of the chemical flow rate; when f ₂ =f ₁ , the pipeline electric valve is automatically closed to achieve precise control of the chemical flow rate;

⑷When the screw mixer of the feeder starts to work, the electric valve of the tap water pipeline on the ball mill opens, the PLC reads the tap water flow meter data f11, and the PLC fetches the tap water flow meter data f12 every 1 second, when f ₁₂ =95%×f At ₁₁ o'clock, the electric valve of the tap water pipeline is automatically closed, and when f ₁₂ = f ₁₁ , the electric valve of the tap water pipeline is automatically closed, realizing precise control of the flow of tap water;

(5) The upper configuration software of the electronic control system realizes the collection, query, and report functions of various data. When querying the report, press the button to select the start date and the button to select the end period. After selecting the query time period, press the button to start query , the system will display all kinds of data queried, including the weight of pulverized coal balls, the weight of water added, and the weight of added chemicals to realize all functions. After pressing the report export button, the system will export the file as an EXCEL report format file.

Compared with prior art, beneficial effect of the present invention:

(1) By integrating the preparation process of coal-water slurry, the present invention controls the particle size of pulverized coal crushing into balls, and adopts a one-time automatic weighing and feeding timing grinding process to reduce the stop-and-go idling phenomenon of pulverized coal crushing and transportation, and realize the loading of coal-water slurry The standardized processing management of material crushing and grinding storage effectively reduces the unqualified performance of coal-water slurry caused by excessive or insufficient grinding time of the ball mill, and greatly improves the production efficiency of coal-water slurry.

(2) The coal-water slurry processing control system designed by the present invention adopts central control integrated management, and the system runs fully automatically. The technician only needs to set the parameters such as coal powder amount, chemical material amount, tap water flow rate, and ball milling time on the system display screen in advance. After the set running time is reached, it will automatically stop, and the alarm will remind the workers to release the slurry, effectively eliminating the occurrence of errors in raw material weighing and inaccurate control of ball milling time due to manual operation, resulting in unqualified preparation of coal-water slurry, with a high degree of automation , The technological operation process is simple, the labor intensity of workers is reduced, the power consumption of the ball mill is reduced, the production capacity is significantly improved, and it meets the continuous and stable production requirements of the enterprise.

(3) The present invention arranges a cleaning plate under the crusher, and the cleaning strips on the cleaning plate are aligned with the sieve gap of the crusher, and the cleaning strips are used to intermittently clean the pulverized coal adhered to the sieve gap to avoid pulverized coal clogging The sieve plate gap can be improved to improve the fineness control of coal powder sieving, which is conducive to the development of subsequent pulverized coal ball milling process, shortening the ball milling time, and stabilizing the production performance of coal water slurry preparation.

Description of drawings

Fig. 1 is a structural representation of the coal-water slurry processing system of the present invention;

Fig. 2 is the front view of the structure of the coal-water slurry processing system of the present invention;

Fig. 3 is a side view of the structure of the coal-water slurry processing system of the present invention;

Fig. 4 is a structural top view of the coal-water slurry processing system of the present invention;

Fig. 5 is the structural representation of the breaker of the coal-water slurry processing system of the present invention;

Fig. 6 is a schematic diagram of the top view structure of the crusher of the coal-water slurry processing system of the present invention;

Fig. 7 is the exploded view of the crusher of the coal-water slurry processing system of the present invention;

Fig. 8 is a schematic diagram of the internal structure of the crusher of the coal-water slurry processing system of the present invention;

Fig. 9 is a schematic cross-sectional view of the internal structure of the crusher of the coal-water slurry processing system of the present invention;

Fig. 10 is a three-dimensional view of the crusher sieve plate structure of the coal-water slurry processing system of the present invention;

Fig. 11 is a structural schematic diagram of the crusher cleaning strip of the coal-water slurry processing system of the present invention;

Fig. 12 is a schematic view of the feeder structure of the coal-water slurry processing system of the present invention;

Fig. 13 is the front view of the feeder structure of the coal-water slurry processing system of the present invention;

Fig. 14 is a top view of the feeder structure of the coal-water slurry processing system of the present invention;

Fig. 15 is a schematic structural view of the ball mill of the coal-water slurry processing system of the present invention;

Fig. 16 is a front view of the ball mill structure of the coal-water slurry processing system of the present invention;

Fig. 17 is the electrical control diagram of the coal-water slurry processing system of the present invention;

Fig. 18 is the main circuit diagram of the ball mill of the coal-water slurry processing system of the present invention;

Fig. 19 is a real-time monitoring diagram of the upper computer configuration software of the coal-water slurry processing system of the present invention;

Fig. 20 is the touch screen operation interface of the coal water slurry processing system of the present invention.

Description of main component symbols:

Detailed ways

The present invention will be described in further detail below in conjunction with accompanying drawing:

Please refer to Figures 1 to 4. The coal water slurry processing control system consists of a coal hopper 1, a hammer crusher 2, a feeder 3, a ball mill 4, and an electric cabinet 5. The coal hopper 1 and the hammer crusher are 2 are connected by the first conveyor belt 6, the hammer crusher 2 and the feeder 3 are connected by the second conveyor belt 7, and the feeder 3 and the ball mill 4 are connected by the third conveyor belt 8.

Please refer to Figures 5 to 7, the hammer crusher 2 is composed of a base 21, a housing 22, a motor 23, a sieve plate 24, and a cleaning plate 25, and the hammer crusher 2 is installed on the base 21 , The hammer crusher 2 is set inside the shell 22 welded by stainless steel plates.

Please refer to Figs. 8 to 11, the motor 23 is connected to the hammer shaft 242 by a belt, and the hammer shaft 242 is provided with a number of pulverized coal crushing hammers 241, the hammer shaft 242 is driven to rotate by the motor 23, and the hammer shaft 242 is surrounded by A sieve plate 24 is provided, and the distance between the hammer head 241 and the sieve plate 24 is 1-5 mm. There are several gaps inside the sieve plate 24 to facilitate the passage of crushed pulverized coal; a cleaning plate 25 is provided under the sieve plate 24, and the cleaning plate 25 two ends are equipped with fixed bar 251, and the middle of fixed bar 251 is provided with mobile cleaning rack 253, and cleaning motor 252 is installed on one end of fixed bar 251, and cleaning motor 252 connects sprocket wheel 255, connects mobile cleaning by chain 256 on the sprocket wheel 255 Frame 253, cleaning plate 25 is installed on the mobile cleaning frame 253, and some equidistant cleaning strips 254 are installed above the cleaning plate 25, and the cleaning strips 254 are aimed at the sieve gap in the sieve plate 24, and the chain 256 is driven by the cleaning motor 252 to move The cleaning frame 253 moves left and right, and the cleaning bar 254 on the cleaning plate 25 is cleaned up the pulverized coal on the sieve gap of the sieve plate 24, so that the hammer crusher 2 does not block the pulverized coal.

Please refer to Fig. 12 to Fig. 14, the feeder 3 is composed of a hopper 31, a screw mixer 32, a lower hopper 33, and a load cell 34. A load cell 34 is provided on the support of the hopper 31 for pulverized coal. For weighing and measuring, the screw mixer 32 is installed below the hopper 31, and the pulverized coal is sent to the lower hopper 33 through the operation of the screw mixer 32, and the lower hopper 33 evenly sprinkles the pulverized coal onto the third conveyor belt 8.

Please refer to Fig. 15 and Fig. 16, the ball mill 4 is composed of an electric valve 41, a feed hopper 42, a chemical material pipeline 43, a tap water pipeline 44, an electric feeding valve 45, a ball mill main motor 46, and an electric cabinet 47. An electric valve 41 is installed at the pulp outlet of the cylinder to connect to the slurry tank, and a feed hopper 42 is provided at the feed inlet on the other side of the cylinder, and a feed electric valve 45 is installed between the feed inlet and the feed hopper 42 to feed the feed. The hopper 42 is connected with the third conveyor belt 8, and the pulverized coal is transported into the feed hopper 42 through the third conveyor belt 8. The upper end of the feed hopper 42 is provided with a chemical material pipeline 43, and one end of the chemical material pipeline 43 is connected to the chemical material slurry pool, the other end connected to the feed hopper 42 is equipped with a flow meter 431 and a pipeline electric valve 432, the lower end of the feed hopper 42 is provided with a tap water pipe 44, one end of the tap water pipe 44 is connected to the water tank, and the other end connected to the feed hopper 42 is installed There is a pipeline electric valve 432 and a tap water flow meter 441. The ball mill barrel is connected to the main motor 46 of the ball mill through a belt, and the electric cabinet is arranged on one side of the ball mill.

Please refer to the accompanying drawings, the coal-water slurry processing control method comprises the following steps:

1. CWS processing control process:

(1) The forklift shovels the coal into the upper coal hopper. After the upper coal hopper is full of materials, the equipment starts;

(2) Set the processing parameters on the touch screen of the system. The first conveying belt 6 transports the coal lumps to the hammer crusher for crushing, and crushes the coal lumps into powdered coal with a particle size of 2-5mm. The pulverized coal passes through the The sieve plate 24 sieves and falls onto the second conveyor belt 7, the second conveyor belt 7 transports the pulverized coal to the feeder 3, and the cleaning bar 254 under the sieve plate 24 intermittently cleans the sieve gap of the sieve plate 24 ;

(3) After the feeder 3 is filled with pulverized coal, the screw mixer 32 under the feeder 3 is started, and the pulverized coal is sent to the third conveyor belt 8 through the lower hopper 33, and the weighing sensor 34 on the feeder 3 measures the pulverized coal. Coal weight, when the pulverized coal weight reaches the set weight value, the feeder 3 stops feeding;

(4) The pulverized coal is transported into the feed hopper 42 by the third conveying belt 8, chemical materials and tap water are sent into the feed hopper 42 through the chemical material pipeline 43 and the tap water pipeline 44 respectively, and the electric feed valve 45 is opened to feed the pulverized coal, chemical The material and water are fed into the barrel of the ball mill 4 together. When the chemical material and tap water start to be transported, the chemical material pipeline 43 and the tap water pipeline flow meter 441 start to measure. When the chemical material and tap water reach the set value, the feed electric valve 45 Close to stop feeding;

(5) The main motor 46 of the ball mill starts and starts to rotate at a fixed frequency. When the accumulated rotation time reaches the set time, the ball mill 4 stops, and the alarm prompts the staff to start discharging the material that has been ground, and the coal-water slurry that has been ball-milled is transported to the In the slurry tank, so far, a working cycle is completed.

In the step (2), when the hammer crusher 2 is in operation, the cleaning motor 252 below the sieve plate 24 drives the cleaning plate 25 to move intermittently left and right through the chain 256, and the cleaning strip 254 on the cleaning plate 25 is opposite to the gap on the sieve plate 24. The pulverized coal is cleaned to effectively prevent the pulverized coal from clogging the sieve plate 24 gaps and improve the pulverized coal sieving effect.

The barrel of the ball mill 3 in the step (5) is 12 meters, with a diameter of 2.38 meters, using low-cost silicon carbide balls as the medium, and the gradation of the balls is Φ30:Φ40:Φ50:Φ60=30%:30%:20%: 20%, put 40 tons of ball stones before ball milling, and add Φ50 and Φ60 ball stones after each ball is ground. The standard for adding is to measure the inner space height of the ball mill. , supplementary empty height is 2.3 meters.

The addition ratio of its coal powder, ball stone, tap water, chemical material is 36.7%: 29.4%: 33.8%: 0.1% when ball mill 4 grinds in described step (5), every ball adds pulverized coal weight 50 tons, adds water 46 tons, adds The chemical material is 150kg, the ball milling time is 4.5 hours, and the water content of the prepared coal water slurry is 48%.

In the step (5), an ultrasonic liquid level gauge is installed on the top of the slurry tank. When it is detected that the coal-water slurry level in the slurry tank is higher than the set height, an alarm device is triggered to remind the staff to pay attention.

2. Electric control system for coal water slurry processing:

(1) Please refer to Figures 17 to 20. The electric control system for coal-water slurry processing is composed of an electric cabinet 5, various sensors, an electric valve 41, a touch screen, and configuration software. The electric cabinet 5 is installed with a ball mill inverter, a circuit breaker, Intermediate relay, PLC and signal terminal block, the main function of PLC is the core of the entire electric control system, PLC communicates with touch screen and configuration software through RS232/RS485, at the same time, PLC communicates with water flowmeter, chemical material flowmeter, slurry tank ultrasonic flowmeter Carry out RS485 communication, read the flow and liquid level data in real time, and control the ball mill 4, feeder 3, and conveyor belt in real time. And collect the alarm information of the frequency converter and circuit breaker, and intervene in the operation status of the equipment in time.

(2) Please refer to Figure 18. _The main circuit of the motor of _the ball mill 4 is composed of a circuit breaker QF ₁ , a fuse FU ₁ and _a frequency converter. To connect, the outlet terminal of fuse FU ₁ is connected to the R/S/T terminal of the frequency converter, and the U/V/W terminal of the frequency converter is connected to the terminal of the motor. The motor power is 315KW, and the inverter is heavy-duty inverter; the STF/RL terminal of the inverter is connected to GND through the intermediate relay, and the PLC output controls the on/off of the intermediate relay to realize the start-stop/deceleration control of the inverter.

(3) Please refer to Figure 20. Before starting the system, set various parameters on the touch screen, mainly including pulverized coal ball number, pulverized coal ball weight, water weight, added chemical weight, and ball mill running time. Press Press the start button on the touch screen to start the system.

The screw mixer 32 of the feeder 3 starts to work and unloads, and the conveyor belt also starts to run. The PLC reads the weight data t ₁ of the load cell 34 on the feeder 3, and the PLC reads the real-time weight of the load cell 34 every 1 second. t ₂ , when t ₂ =95%×t ₁ , the screw mixer 32 starts to decelerate to achieve precise control of the pulverized coal weight of the ball mill, and when t ₂ =t ₁ , the screw mixer 32 stops running.

When the screw mixer 32 of the feeder 3 starts to work, the pipeline electric valve 432 of the chemical material pipeline 43 on the ball mill 4 is opened, and the PLC reads the chemical material flow meter data f ₁ , and the PLC retrieves the chemical material flow meter data every 1 second f ₂ , when f ₂ =95%×f ₁ , the valve of the pipeline electric valve 432 is automatically closed to achieve precise control of the chemical flow rate; when f ₂ =f ₁ , the pipeline electric valve 432 is automatically closed to achieve precise control Evolved chemical flow.

When the screw mixer 32 of the feeder 3 starts working, the electric valve 442 of the tap water pipeline on the ball mill 4 is opened, and the PLC reads the tap water flow meter data f ₁₁ , and the PLC fetches the tap water flow meter data f ₁₂ every 1 second, when f ₁₂ =95%×f ₁₁ , the valve of the tap water pipeline electric valve 442 is automatically closed, and when f ₁₂ =f ₁₁ , the tap water pipeline electric valve 442 is automatically closed, realizing precise control of the tap water inlet flow.

(4) Please refer to Figure 19. The upper configuration software of the electronic control system realizes the collection, query, and report functions of various data. When querying the report, press the button to select the start date and the button to select the end period to select the query time period Afterwards, press the Start Query button, and the system will display various data queried, including the weight of pulverized coal balls, the weight of water added, and the weight of added chemical materials, to realize all functions. After pressing the report export button, the system will export the file as an EXCEL report format file.

The above descriptions are only preferred embodiments of the present invention, and all equivalent changes and modifications made according to the scope of the claims of the present invention shall fall within the scope of the claims of the present invention.

Claims (10)

1. The coal water slurry processing device is characterized by comprising an upper coal hopper, a hammer crusher assembly, a feeder, a ball mill and an electric cabinet which are sequentially connected into a production line through a conveying belt; the hammer crusher assembly comprises a base and a crushing assembly sleeved on the base.

2. The coal water slurry processing device according to claim 1, wherein the crushing assembly comprises a motor, a hammer shaft driven by the motor to rotate through a belt, and a plurality of crushing hammers fixedly arranged on the hammer shaft and used for pulverized coal, sieve plates with a plurality of sieve gaps are arranged around the hammer shaft, the distance between the hammers and the sieve plates is 1-5mm, and pulverized coal can pass through conveniently; the cleaning plate is arranged below the screen plate, the cleaning plate is arranged on the movable cleaning frame, the two ends of the movable cleaning frame and the two ends of the fixed strip are respectively provided with a chain wheel, the cleaning motor is arranged at one end of the fixed strip, an output shaft of the cleaning motor is connected with the chain wheels, the movable cleaning frame is connected with the chain wheels through the chain wheels, a plurality of cleaning strips which are arranged at equal intervals are arranged above the movable cleaning plate, the cleaning strips are aligned with the screen gaps in the screen plate, a limit proximity switch is arranged on the fixed strip, the cleaning motor is positively and negatively rotated through two contactors, when the cleaning motor rotates clockwise, the cleaning motor is contacted with the right-side installed proximity switch, the cleaning motor is stopped, the cleaning motor rotates anticlockwise after time delay T1, the chain moves leftwards and leftwards after the contact of the left-side installed proximity switch, the cleaning motor is stopped, and circulation is performed, the cleaning strips on the cleaning plate are driven to clean pulverized coal on the screen gaps of the screen plate through the cleaning motor, and the hammer crusher is not blocked.

3. The coal water slurry processing apparatus according to claim 1, wherein the feeder comprises a hopper, a screw mixer arranged in the bottom of the hopper and having one end penetrating from outside to inside, a discharging hopper arranged at the bottom of the screw mixer outside the hopper, and a weighing sensor arranged on the hopper support and used for weighing and measuring the pulverized coal, the feeder is operated by the screw mixer to convey the pulverized coal from the hopper to the discharging hopper, and the discharging hopper uniformly spills the pulverized coal on the conveying belt.

4. The device for processing the coal water slurry according to claim 1, wherein the ball mill consists of a cylinder, a main motor of the ball mill, a motor valve, a feeding hopper, a pipeline motor valve, a flowmeter, a chemical material pipeline, a tap water flowmeter, a pipeline motor valve and a tap water pipeline, wherein the main motor of the ball mill is connected with the cylinder through a belt, the motor valve is arranged at a slurry outlet of the cylinder, the motor valve is connected with a slurry pond, the feeding hopper is arranged at a feeding port at the other side of the cylinder, the feeding motor valve is arranged at a joint part of the feeding hopper and the feeding hopper, the pipeline motor valve is sequentially connected with the upper end of the feeding hopper through a pipeline, the flowmeter is connected with a chemical material pipeline of the chemical material slurry pond at the other end, the tap water flowmeter is sequentially connected with the lower end of the feeding hopper through a pipeline, and the tap water pipeline is connected with a water tank at the other end; the ball mill electric cabinet is arranged at one side of the ball mill.

5. The coal water slurry processing method is characterized by comprising the following steps of:

the method comprises the steps that a forklift shovels coal blocks into an upper coal bucket, and after the upper coal bucket is full of materials, equipment is started;

setting processing parameters on a touch screen of the system, conveying coal blocks into a hammer crusher by a first conveying belt for crushing, crushing the coal blocks into pulverized coal with a particle size of 2-5mm, sieving the pulverized coal by a sieve plate, and dropping the pulverized coal onto a second conveying belt, conveying the pulverized coal into a feeder by the second conveying belt, and intermittently cleaning sieve gaps of the sieve plate by a cleaning strip below the sieve plate;

thirdly, after the feeding machine is filled with pulverized coal, starting a spiral stirrer below the feeding machine, conveying the pulverized coal to a third conveying belt through a discharging hopper, measuring the weight of the pulverized coal by a weighing sensor on the feeding machine, and stopping discharging when the weight of the pulverized coal reaches a set weight value;

the pulverized coal is conveyed into a feed hopper of the ball mill by a third conveying belt, the chemical material and tap water are respectively conveyed into the feed hopper through a chemical material pipeline and a tap water pipeline, a feeding electric valve is opened, the pulverized coal, the chemical material and the water are conveyed into a barrel of the ball mill together, when the chemical material and the tap water are conveyed, the chemical material pipeline and a tap water pipeline flowmeter begin to measure, and when the chemical material and the tap water reach set values, the feeding electric valve is closed to stop feeding;

and (5) starting a main motor of the ball mill, starting to rotate according to a fixed frequency, stopping the ball mill when the accumulated rotation time reaches a set time, alarming to prompt a worker that the ground material starts to be discharged, and conveying the ball-milled water-coal-slurry into a slurry tank through a pipeline, so that one working cycle is completed.

6. The method according to claim 5, wherein the step is characterized in that when the hammer crusher is operated, two contactors are arranged below the screen plate to realize forward rotation and reverse rotation of the cleaning motor, when the cleaning motor rotates clockwise, the cleaning motor is stopped when the cleaning motor contacts with a proximity switch arranged on the right side, the cleaning motor rotates anticlockwise after time delay T1, the chain moves leftwards, after the cleaning motor contacts with a proximity switch arranged on the left side, the cleaning motor is stopped, the cleaning plate is driven to intermittently move leftwards and rightwards by the chain in such a way, and the cleaning bars on the cleaning plate clean pulverized coal on the screen gap of the screen plate, so that the screen gap of the screen plate is effectively prevented from being blocked by the pulverized coal, and the pulverized coal sieving effect is improved.

7. The method for processing coal water slurry according to claim 5, wherein the bowl of the ball mill in the step of washing is 12 m, 2.38 m in diameter, adopting low-cost silicon carbide ball stone as a medium, wherein the ball stone has the grading of phi 30: phi 40, phi 50, phi 60=30%: 30%:20%: and 40 tons of ball stones are firstly put into the ball mill before ball milling, and after one ball is milled, the ball stones of phi 50 and phi 60 are additionally added, the standard of adding is to measure the ball milling internal empty height, and when the internal empty height is less than 2.3 meters, the ball stone supplement is carried out, and the supplementary empty height is 2.3 meters;

during grinding by the ball mill in the step II, the adding ratio of the pulverized coal, the ball stone, the tap water and the chemical industry material is 36.7 percent: 29.4%:33.8%:0.1 percent of the weight of the pulverized coal added into each ball is 50 tons, 46 tons of water is added, 150kg of chemical is added, the ball milling time is 4.5 hours, the water content of the prepared water coal slurry is 48 percent, the water coal slurry passes through 200 meshes when discharged, and the screen residue is controlled within 8.2 percent;

and in the step II, an ultrasonic liquid level meter is arranged at the top of the slurry tank, and when the liquid level of the water-coal-slurry entering the slurry tank is detected to be higher than the set height, an alarm device is triggered to prompt the attention of staff.

8. The electric control system for processing the coal water slurry is characterized by comprising an electric cabinet, a PLC, a main circuit of a motor of the ball mill, various sensors, an electric valve, a touch screen and configuration software, wherein a ball mill frequency converter, a circuit breaker, an intermediate relay, the PLC and a signal terminal strip are arranged in the electric cabinet; and alarm information of the frequency converter and the circuit breaker is collected, and the running state of the equipment is intervened in time.

9. The electric control system for processing coal water slurry according to claim 8, wherein the main circuit of the ball mill motor is formed by a breaker QF ₁ Fuse FU ₁ The circuit breaker is composed of a frequency converter and a motor, and the breaker is subjected to end QF ₁ Connected with a main power supply, the breaker QF ₁ Wire outlet end and fuse FU ₁ Connection, fuse FU ₁ The wire outlet end is connected with an R/S/T terminal of the frequency converter, and a U/V/W terminal of the frequency converter is connected with a wiring terminal of the motor; the power of the motor is 315KW, and the frequency converter selects a heavy-duty frequency converter; STF/RL terminal of frequency converter through intermediate relayThe electric appliance is connected with the grounding end GND of the electric wire, and the PLC outputs and controls the on/off of the intermediate relay to realize the start-stop/deceleration control of the frequency converter.

10. The control method of the coal water slurry processing electric control system is characterized by comprising the following steps of:

before a system is started, setting various parameters including a pulverized coal ball feeding number, a pulverized coal ball feeding weight, a water adding weight, a chemical adding weight and a ball mill running time on a touch screen, and pressing a start button on the touch screen to start the system;

the spiral stirrer of the feeding machine starts to work and discharge, the conveying belt also starts to run, and the PLC reads weighing data t of the weighing sensor on the feeding machine ₁ The PLC reads the real-time weight t of the weighing sensor every 1 second ₂ When t ₂ ＝95％×t ₁ When the spiral stirrer starts to decelerate, the weight of the pulverized coal entering the ball mill is accurately controlled, and when t ₂ ＝t ₁ When the spiral stirrer is stopped;

when the spiral stirrer of the feeding machine starts to work, the pipeline electric valve of the chemical pipeline on the ball mill is opened, and the PLC reads the data f of the chemical material flowmeter ₁ The PLC signals and fetches the data f of the chemical flow meter every 1 second ₂ When f ₂ ＝95％×f ₁ When the electric valve of the pipeline is automatically closed, the flow of the evolution work material is accurately controlled, and when f ₂ ＝f ₁ When the pipeline electric valve is closed automatically, the flow of the evolution work material is accurately controlled;

when the spiral stirrer of the feeding machine starts to work, the electric valve of the tap water pipeline on the ball mill is opened, and the PLC reads tap water flowmeter data f ₁₁ PLC takes data f from water flowmeter every 1 second ₁₂ When f ₁₂ ＝95％×f ₁₁ When f, the electric valve of the tap water pipeline is automatically closed ₁₂ ＝f ₁₁ When the tap water pipeline electric valve is automatically closed, the accurate control of the tap water inflow rate is realized;

the electronic control system uploading pattern software realizes the functions of collecting, inquiring and reporting various data, when inquiring a report, the buttons of selecting the starting date and the ending period are pressed successively, after the inquiring time period is selected, the button for starting inquiring is pressed, the system displays various inquired data, including the ball feeding weight of powdered coal, the water adding weight and the chemical adding weight, the function of unity is realized, and after the button for exporting the report is pressed, the system exporting file is an EXCEL report format file.

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