Intelligent blending device for coal preparation plant

Abstract

The utility model discloses an intelligent blending device for a coal preparation plant, which comprises a coal slime buffer hopper, the bottom of the coal slime buffer hopper is connected with a first weighing coal feeder, a second weighing coal feeder and a third weighing coal feeder, the lower end of the first weighing coal feeder is provided with a first belt conveyor, and the lower end of the third weighing coal feeder is provided with a second belt conveyor. A second belt conveyor is arranged at the lower end of the second weighing coal feeder, and a third belt conveyor is arranged at the lower end of the third weighing coal feeder. According to the intelligent blending device for the coal preparation plant, the ash and water measuring instrument and the sampling machine are installed, real-time sampling is carried out through the sampling machine, the real-time product quality is transmitted back to the coal blending expert system through the ash and water measuring instrument, the expert system automatically calculates the blending proportion of clean coal and coal slime according to the heating value of a required product, and the blending proportion of the clean coal and the coal slime is calculated according to the heating value of the required product. And the frequency of the coal slime coal feeder is calculated according to the data of the electronic belt scale of each belt conveyor and the data of the electronic belt scale of the feeding belt conveyor, so that the intelligent control of coal blending is realized.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of coal slime and product coal blending, in particular to a coal preparation plant intelligent blending device. BACKGROUND

[0002] The coal preparation plant intelligent blending device is a supporting equipment for blending coal slime and product coal, optimizes the traditional coal blending system of the coal preparation plant based on fuzzy neural network control technology, optimizes the coal blending equipment, focuses on accurately controlling the ash content and sulfur content of the coal for export, optimizes the operation mode of the coal blending system, and along with the continuous development of science and technology, people's manufacturing process requirements for the coal preparation plant intelligent blending device are also higher and higher.

[0003] The existing coal preparation plant intelligent blending device has certain disadvantages in use. First, the existing coal preparation plant intelligent blending device has low automation degree in use, is complex to install, cannot be well monitored, and is troublesome to control, which is not conducive to the use of people. In addition, the device state and flow parameter cannot be quickly queried, which brings certain adverse effects to the actual use process. Therefore, we propose a coal preparation plant intelligent blending device. UTILITY MODEL CONTENT

[0004] In view of the deficiencies of the prior art, the utility model provides a coal preparation plant intelligent blending device, which realizes real-time sampling through a sampling machine, and transmits real-time product quality back to a coal blending expert system through an ash and water measuring instrument. The expert system automatically calculates the blending ratio of clean coal and coal slime according to the calorific value of the required product, and further calculates the frequency of the coal slime feeder according to the electronic belt scale data of each belt conveyor and the data of the electronic belt scale of the feeding belt conveyor, so as to realize intelligent control of coal blending and effectively solve the problems in the background art.

[0005] To achieve the above purpose, the utility model adopts the technical scheme: a coal preparation plant intelligent blending device, comprising a coal slime buffer hopper, the bottom of the coal slime buffer hopper is connected with a first weighing coal feeder, a second weighing coal feeder and a third weighing coal feeder, the lower end of the first weighing coal feeder is provided with a first belt conveyor, the lower end of the second weighing coal feeder is provided with a second belt conveyor, the lower end of the third weighing coal feeder is provided with a third belt conveyor, the top of the coal slime buffer hopper is provided with a feeding belt conveyor, the lower end of the feeding belt conveyor is provided with a feeding belt support, and the feeding belt conveyor is internally provided with a feeding belt scale.

[0006] Preferably, the first belt conveyor comprises a conveyor support, a conveyor belt, an electronic belt scale, an ash and water measuring instrument, a sampling machine, a data storage server and an instrument support, the conveyor support is located at both ends of the conveyor belt, the electronic belt scale is located inside the conveyor belt, the instrument support is located at the side of the conveyor support, the ash and water measuring instrument and the sampling machine are installed on the instrument support and face the conveyor belt, and the data storage server is installed on the back of the instrument support.

[0007] Preferably, the coal slime buffer hopper is connected with the first, second and third weighing coal feeders through pipes, the coal slime buffer hopper is provided with a hopper support outside, and the first, second and third weighing coal feeders are provided with coal feeder supports.

[0008] Preferably, the electronic belt scale monitors the weight of the material on the conveyor belt, the ash and water measuring instrument and the sampling machine monitor the quality of the material on the conveyor belt and sample respectively, and transmit data to the data storage server.

[0009] Preferably, the coal slime buffer hopper is connected with the first, second and third weighing coal feeders through pipes, the coal slime buffer hopper is provided with a hopper support outside, and the first, second and third weighing coal feeders are provided with coal feeder supports.

[0010] Preferably, the first belt conveyor is supported by a feeding belt support, and the material on the first belt conveyor is conveyed to the inside of the coal slime buffer hopper, and the feeding belt scale monitors the cumulative amount of the material.

[0011] Compared with the prior art, the utility model provides a kind of intelligent blending device of coal preparation plant, with following beneficial effect: this one kind intelligent blending device of coal preparation plant, by sampling machine real-time sampling, and by ash and water measuring instrument, real-time product quality is transmitted back to blending coal expert system, and expert system is according to the calorific value of demand product, automatically calculates the blending ratio of clean coal and coal slime, and then calculates the frequency of coal slime feeder according to the data of each electronic belt scale of belt conveyor and the data of the electronic belt scale of loading belt conveyor, realizes the intelligent control of blending coal;The control system can realize the collection of equipment state, flow, etc.Parameter, and can save data at any time;Remote data transmission can be realized, and only need to be beside computer, the key parameters and working condition of all intelligent blending data can be known;When monitoring the abnormality of the related data parameters of intelligent blending, stop signal or prompt information can be sent;Realize that the parameter data of the system is sent to touch screen and host computer, and staff can conveniently observe intelligent blending production condition in centralized control room;On host computer, the intelligent blending parameters of any day in recent period can be traced back, and production stability is conveniently analyzed;The data display platform established on host computer can simply and clearly find out the problem, and the whole intelligent blending device of coal preparation plant is simple in structure, convenient to operate, and the effect of use is better than traditional mode. BRIEF DESCRIPTION OF DRAWINGS

[0012] Figure 1 It is the whole structure schematic diagram of the utility model one kind intelligent blending device of coal preparation plant.

[0013] Figure 2 It is the structure schematic diagram of feeder in the utility model one kind intelligent blending device of coal preparation plant.

[0014] Figure 3 It is the structure schematic diagram of belt conveyor in the utility model one kind intelligent blending device of coal preparation plant.

[0015] Figure 4 It is the intelligent blending logic flow chart of coal preparation plant in the utility model one kind intelligent blending device of coal preparation plant.

[0016] In the drawing: 1, coal slime buffer hopper;2, hopper support;3, first weighing feeder;4, first belt conveyor;5, second belt conveyor;6, second weighing feeder;7, third belt conveyor;8, third weighing feeder;9, feeder support;10, loading belt support;11, loading belt scale;12, loading belt conveyor;13, guide pipe;14, conveyor support;15, conveyor belt;16, electronic belt scale;17, ash and water measuring instrument;18, sampling machine;19, data storage server;20, instrument support. DETAILED DESCRIPTION

[0017] The technical solutions of the utility model will be described clearly and completely in combination with the drawings and specific embodiments.

[0018] As Figures 1-4 shown, an intelligent blending device of a coal preparation plant includes a slime buffer hopper 1, the bottom of the slime buffer hopper 1 is connected with a first weighing coal feeder 3, a second weighing coal feeder 6 and a third weighing coal feeder 8, the lower end of the first weighing coal feeder 3 is provided with a first belt conveyor 4, the lower end of the second weighing coal feeder 6 is provided with a second belt conveyor 5, the lower end of the third weighing coal feeder 8 is provided with a third belt conveyor 7, the top of the slime buffer hopper 1 is provided with a feeding belt conveyor 12, the lower end of the feeding belt conveyor 12 is installed with a feeding belt support 10, the inside of the feeding belt conveyor 12 is installed with a feeding belt scale 11, real-time sampling is performed by a sampling machine, and real-time product quality is transmitted back to a coal blending expert system by an ash and water measuring instrument, the expert system automatically calculates the blending ratio of clean coal and slime according to the calorific value of the required product, and further calculates the frequency of the slime coal feeder according to the data of the electronic belt scale of each belt conveyor and the data of the electronic belt scale of the feeding belt conveyor, so as to realize intelligent control of coal blending.

[0019] The first belt conveyor 4 includes a conveyor support 14, a conveyor belt 15, an electronic belt scale 16, an ash and water measuring instrument 17, a sampling machine 18, a data storage server 19 and an instrument support 20, the conveyor support 14 is located at both ends of the conveyor belt 15, the electronic belt scale 16 is located inside the conveyor belt 15, the instrument support 20 is located at the side of the conveyor support 14, the ash and water measuring instrument 17 and the sampling machine 18 are installed on the instrument support 20 in a position facing the conveyor belt 15, and the data storage server 19 is installed on the back of the instrument support 20.

[0020] The slime buffer hopper 1, the first weighing coal feeder 3, the second weighing coal feeder 6 and the third weighing coal feeder 8 are all connected with a conduit 13, the outside of the slime buffer hopper 1 is installed with a hopper support 2, and the first weighing coal feeder 3, the second weighing coal feeder 6 and the third weighing coal feeder 8 are installed with a coal feeder support 9.

[0021] The electronic belt scale 16 monitors the loading weight of the conveyor belt 15, the ash and water measuring instrument 17 and the sampling machine 18 respectively monitor the quality of the loading body of the conveyor belt 15 and perform sampling, and transmit the data to the data storage server 19.

[0022] The slime buffer hopper 1, the first weighing coal feeder 3, the second weighing coal feeder 6 and the third weighing coal feeder 8 are connected through the conduit 13, the slime buffer hopper 1 is supported by the hopper support 2, and the first weighing coal feeder 3, the second weighing coal feeder 6 and the third weighing coal feeder 8 are supported by the coal feeder support 9.

[0023] The feeding belt conveyor 12 is supported by the feeding belt support 10, and the feeding body of the feeding belt conveyor 12 is conveyed into the inside of the coal slime buffer hopper 1, and the feeding belt scale 11 monitors the cumulative amount of the feeding body.

[0024] The system determines and approves the coal slime blending scheme through a computer program. The core of the system is to calculate the selectable blending scheme by using a genetic algorithm according to the characteristics of the clean coal and the requirements of the product coal of the user. The electrical control part calculates the blending ratio through the belt scale of the production control system, then controls the coal feeder to automatically complete the blending task and process monitoring, and finally realizes the reasonable blending of the press-filtered coal slime and the clean coal to maximize the customer demand and benefit. In the newly-built high-pressure coal slime press-filtering system, the coal slime enters the coal slime buffer hopper through the feeding belt, and the variable-frequency controlled weighing coal feeder is blended with the corresponding belt. Each group of belt has a belt scale, and it is necessary to install a coal and water measuring instrument on three product belts to transmit the real-time product quality back to the blending system. The system automatically calculates the blending ratio of the clean coal and the coal slime according to the calorific value of the required product, and then calculates the frequency of the coal slime coal feeder according to the data of the belt scale and the data of the coal slime belt scale to realize the intelligent control of the blending. The intelligent blending system needs to combine the intelligent blending algorithm software platform and the basic industrial control. The software platform focuses on algorithm operation and provides blending scheme; the PLC focuses on the bottom layer of the execution equipment control, and through the close combination of the two, the efficient intelligent blending is achieved.

[0025] Working principle: The utility model discloses a coal slime buffer hopper 1, funnel support 2, first weighing coal feeder 3, first belt conveyor 4, second belt conveyor 5, second weighing coal feeder 6, third belt conveyor 7, third weighing coal feeder 8, coal feeder support 9, loading belt support 10, loading belt scale 11, loading belt conveyor 12, guide pipe 13, conveyor support 14, conveyor belt 15, electronic belt scale 16, ash and water measuring instrument 17, sampling machine 18, data storage server 19, instrument support 20, automatic coal slime blending system is mainly composed of intelligent coal slime blending expert system and electrical control system two parts. Expert system completes the determination and approval of coal slime blending scheme through computer program. Its core is that according to the characteristics of clean coal and the requirement of product coal of user, the selectable blending scheme is calculated by using genetic algorithm. The electrical control part calculates the proportion through the belt scale of production control system, and then controls the coal feeder to automatically complete the blending task and process monitoring, and finally realizes the reasonable blending of filter-pressing coal slime and clean coal to reach the maximization of customer demand and benefit. In the new high-pressure coal slime filter-pressing system, the coal slime enters the coal slime buffer hopper through the belt, and is blended with the corresponding belt by the weighing coal feeder controlled by variable frequency. Each group of belt has a belt scale, and ash and water measuring instrument and sampling machine need to be installed on three product belts, real-time sampling is carried out through the sampling machine, and the real-time product quality is transmitted back to the blending expert system by the ash and water measuring instrument, the expert system automatically calculates the blending ratio of clean coal and coal slime according to the calorific value of the required product, and then calculates the frequency of the coal slime coal feeder according to the data of the electronic belt scale of each belt conveyor and the data of the electronic belt scale of the loading belt conveyor, to realize the intelligent control of blending.

[0026] Main hardware parameters:

[0027] Ash and water measuring instrument

[0028] Principle summary

[0029] Ash, moisture content and calorific value are important indexes of coal quality. In the coal industry, the traditional method is to send samples to the laboratory for analysis. This method not only consumes time and effort, but more importantly, the data obtained is only historical data, not real-time data. Because the actual process parameters may have changed during the long sampling and testing process. Therefore, the data obtained by laboratory testing cannot truly reflect the actual ash and moisture content of the material in the actual process. Usually, the calorific value of coal is determined in the laboratory by the "oxygen bomb" method. This method requires precise instruments and corresponding experimental techniques, is affected by many environmental factors, has a complicated determination method, is lagging, time-consuming, and has large dispersion in time and space. The analysis result cannot quickly obtain the test result. Because the ash and moisture content of coal cannot be quickly detected online, the product quality of the production process cannot be effectively controlled in time.

[0030] The ash content and moisture content of coal have a good correlation with the calorific value of coal. Generally speaking, the calorific value of coal decreases with the increase of ash content and moisture content, and changes regularly. The ash content is detected by precise detection of the radiation of trace radioactive elements commonly present in coal, and the moisture content is measured by microwave transmission method. The calorific value is calculated using the measured ash content / moisture content.

[0031] Structural features

[0032] The online detection equipment of the passive online detection system includes a natural ray ash content meter and a coal flow instantaneous load weighing device. The natural ray ash content meter measures the ash content online based on the natural ray principle, has a reserved moisture meter interface, and can access moisture meter parameters to obtain coal calorific value data through calculation, and can form a unified whole to obtain real-time ash content, yield, moisture content and calorific value data of the coal flow on the belt simultaneously.

[0033] Main features

[0034] Easy to install: modular design, easy to install.

[0035] Less calibration workload: the on-site calibration workload is only 40% of the calibration workload of the double-source ash content meter.

[0036] Full-range detection: the active ash content meter is a small-range sampling detection in the middle part of the belt conveyor, and the ash-water calorific value meter is a full-face detection, so the ash content data is more accurate and representative.

[0037] Ash content and yield integration: due to full-range detection, the ash-water calorific value meter and the natural gamma ray ash content meter can provide accurate ash content and yield data of the coal on the belt conveyor.

[0038] Can access moisture measurement data, and display the calorific value of coal online.

[0039] Real-time ash content measurement: 10s, 1 minute, 10 minutes, and hourly ash content.

[0040] Cumulative quantity measurement: the full-range load detection device realizes accurate cumulative quantity measurement.

[0041] Report function: 10s, 1 minute, 10 minutes, and hourly ash content report statistics, records, and inquiries, shift yield, and daily yield report statistics, records, and inquiries.

[0042] Network function: the upper software has a network function to realize data network sharing.

[0043] Input and output interface: 1 RS-485 communication interface, 1 Ethernet interface, 1 4-20mA input, and 1 4-20mA output for communication and moisture meter access, and large screen display.

[0044] Characteristic parameter preset: multiple coal characteristic spectral line parameters can be preset.

[0045] Calorific value function: reserve moisture measurement interface, automatically calculate calorific value combined with ash data.

[0046] 1.4 Measurement accuracy

[0047] ±0.5% (ash content below 15%)

[0048] ±1.0% (ash content between 15%-30%)

[0049] ±1.5% (ash content between 30%-50%)

[0050] ±2.5% (ash content between 50%-90%)

[0051] Suitable environment

[0052] Adaptive belt speed: between 0-4.5m / s

[0053] Adaptive belt width: 1000-1400mm

[0054] Power supply voltage: AC220V

[0055] Monitoring software

[0056] Main functions:

[0057] The monitoring software can display the instantaneous values of ash content, moisture content, and calorific value measurement (1 minute value, 10 minute value, 1 hour value);

[0058] Detailed historical ash content, moisture content, and calorific value data at any time can be queried

[0059] It has networking function, and each staff can check the actual production situation through local area network;

[0060] It can automatically perform system parameter verification and provide verification data query;

[0061] It can set upper and lower limits of ash content, moisture content, and calorific value alarm;

[0062] RS485 / RS232 serial communication outputs ash content, moisture content, and calorific value measurement information;

[0063] The monitoring software has password authority, which can set password level according to actual user situation, ensure data authenticity, and effectively ensure data security.

[0064] Working principle of sampling machine

[0065] The sampling device is composed of a middle part (head part) sampling machine, a feeding belt machine, a crusher, a splitter, a sample collector, a waste returning system and a control system. The middle part and head part automatic sampling machines of the belt fully meet the requirements of the national standard. The moisture and granularity of the sampled coal sample have no special requirements; the sampling interval (time, quality) can be set by a timing controller or a program. For safety, the middle part sampling machine is generally used for bulk materials with a bulk specific gravity of less than 1.6 t / m3.

[0066] The sampling device scrapes and sweeps the whole cross section of the belt according to the set time, the sub-sample is put into the primary feeding belt machine through a chute, meanwhile, the sample is uniformly sent into the crusher to be crushed to a certain granularity (generally 6-13 mm), then the sample is divided into a sample to be kept and waste through the secondary belt and the splitter, the sample to be kept is automatically collected in the storage tank, and the waste is returned to the belt by the bucket elevator. The above shows and describes the basic principle and main features of the utility model and the advantages of the utility model. It should be understood by the technicians in the industry that the utility model is not limited by the above embodiments, the above embodiments and the description in the specification are only to illustrate the principle of the utility model, and the utility model will have various changes and improvements without departing from the spirit and scope of the utility model, and these changes and improvements all fall within the scope of the utility model claimed.

Claims

1. A coal preparation plant intelligent blending device, comprising a slime buffer hopper (1), characterized in that: The bottom of the coal slime buffer hopper (1) is connected with a first weighing coal feeder (3), a second weighing coal feeder (6) and a third weighing coal feeder (8), the lower end of the first weighing coal feeder (3) is provided with a first belt conveyor (4), the lower end of the second weighing coal feeder (6) is provided with a second belt conveyor (5), the lower end of the third weighing coal feeder (8) is provided with a third belt conveyor (7), the top of the coal slime buffer hopper (1) is provided with a feeding belt conveyor (12), the lower end of the feeding belt conveyor (12) is installed with a feeding belt support (10), and the inside of the feeding belt conveyor (12) is installed with a feeding belt scale (11).

2. The intelligent blending device of a coal preparation plant according to claim 1, characterized in that: The first belt conveyor (4) comprises a conveyor support (14), a conveyor belt (15), an electronic belt scale (16), a ash and water measuring instrument (17), a sampling machine (18), a data storage server (19) and an instrument support (20), the conveyor support (14) is located at both ends of the conveyor belt (15), the electronic belt scale (16) is located inside the conveyor belt (15), the instrument support (20) is located at the side of the conveyor support (14), the ash and water measuring instrument (17) and the sampling machine (18) are installed on the instrument support (20) and face the conveyor belt (15), and the data storage server (19) is installed on the back of the instrument support (20).

3. The intelligent blending device of a coal preparation plant according to claim 1, characterized in that: The coal slime buffer hopper (1) and the first weighing coal feeder (3), the second weighing coal feeder (6) and the third weighing coal feeder (8) are connected with a pipe (13), the outer side of the coal slime buffer hopper (1) is installed with a hopper support (2), and the first weighing coal feeder (3), the second weighing coal feeder (6) and the third weighing coal feeder (8) are installed with a coal feeder support (9).

4. The intelligent blending device of a coal preparation plant according to claim 2, characterized in that: The electronic belt scale (16) monitors the weight of the material loaded on the conveyor belt (15), and the ash and water measuring instrument (17) and the sampling machine (18) monitor the quality of the material loaded on the conveyor belt (15) and sample, and transmit data to the data storage server (19).

5. The intelligent blending device of a coal preparation plant according to claim 3, characterized in that: The coal slime buffer hopper (1) and the first weighing coal feeder (3), the second weighing coal feeder (6) and the third weighing coal feeder (8) are connected through the pipe (13), the coal slime buffer hopper (1) is supported by the hopper support (2), and the first weighing coal feeder (3), the second weighing coal feeder (6) and the third weighing coal feeder (8) are supported by the coal feeder support (9).

6. The intelligent blending device of a coal preparation plant according to claim 1, characterized in that: The feeding belt conveyor (12) is supported by the feeding belt support (10), and the material loaded on the feeding belt conveyor (12) is conveyed to the inside of the coal slime buffer hopper (1), and the feeding belt scale (11) monitors the cumulative amount of the material loaded.

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