1.TK-2000 is suitable for on-line measurement of belt coal conveying mechanism. The self-support of instruments installed on site can be divided into vertical simple support and horizontal support.
1. 1 simply supported vertically
Applicable requirements for vertical simple support:
Suitable for direct measurement of coal on the belt, but there are requirements for the thickness of coal on the belt:
Coal seam thickness: thickness: ≤350mm, ≥ 100mm (when the change of coal seam thickness on the belt exceeds 10% of the average value, beams and leveling devices should be added, and there should be no steel wires, steel bars and other substances in the belt).
Particle size of measured coal: thickness and particle size requirements
100 ~ 150mm & lt； 13mm
150 ~ 300mm & lt； 40 mm
1.2 horizontal support
The bracket is non-standard, designed according to the field situation, and has no requirements for the conveying mechanism. There is a sub-sample collection system to collect samples for laboratory analysis.
2.TK-200 off-line model is suitable for off-line measurement of coal transported by cars and trains. This series of products can be widely used in thermal power plants, coal washing plants, coke plants, cement plants, fertilizer plants, steel plants and other units that use a large number of sticky coal, raw coal and various coal products, and can quickly determine important performance indicators such as ash and calorific value of coal. It has the characteristics of stable performance, fast test speed, high precision and simple operation. At the same time, the instrument has the functions of storage and remote monitoring, and can be connected with local area network. When in use, it can be used off-line and alone, and can also be used with the mechanized sampler in the factory. All kinds of configurations belong to the mature technology used by users of our company.
2. 1 TK-200 off-line type can be used alone.
Structural features: TK-200 offline structure is divided into two parts, namely measuring device and data processing part (including computer data analysis system), with clear structural layout and simple maintenance.
Installation mode: the instrument is installed indoors, without complicated sample preparation process, and can be sampled at multiple points and measured one by one.
2.2 TK-200 off-line model is used together with mechanized sampler.
Structural characteristics of mechanized coal sampler: Mechanized coal sampler is divided into sampling device and sample pretreatment.
Installation mode: the mechanized sampler in the factory is installed by bridge, and TK-200 is installed off-line with the sampling mechanism, with reasonable structure and simple maintenance. ZZ-89(B/C/D/G) coal ash analyzer (developed by Tsinghua University) was adopted.
ZZ-89C/D on-line ash analyzer is improved on the basis of ZZ-89A ash analyzer. ZZ-89A ash analyzer adopts DOS operating system, and an industrial computer can only take one set of measuring equipment. ZZ-89C/D has the basic functions of type A ash analyzer, adopts Windows operating system and has networking function. 1 industrial computer can control multiple ash analyzers.
Model C is a rotating structure, equipped with a standard measuring block, which can check the parameters according to the set calibration time (usually one day/kloc-0 times) and automatically correct the slow drift of the instrument; Type D is a fixed structure with small installation space and convenient installation, but it needs regular inspection.
Performance index: measurement accuracy of coal; Clean coal (ash
Effect of moisture: for every change of moisture 1%, the measured value of ash generally changes by about 0.05%~0. 1% (related to coal type);
Stability: continuously measure the standard block and take any 8 hours of data, in which the maximum deviation between any "10 min ash" value and the average value shall not exceed 0.5%.
Functional characteristics
It can display the gray scores of 1 minute, 1 minute and1hour;
You can query the ash content of 10 minute, hour, day, month and any time interval;
Slow drift of automatic calibrator and attenuation of radioactive source;
Set remote LED ash display instrument to display ash data to operators in time;
According to the running situation of the belt and the coal flow on the belt, the working state is automatically determined;
Can store a variety of coal quality parameters, the number is not strictly limited;
Very large scale integrated circuit FPGA integrated chip, modular computer;
Provide two channels of 4-20mA analog signals and serial communication interface output for gray display or connection with centralized control system;
Above Windows2000, an industrial computer can carry 16 ash analyzer hosts at most;
The measurement system monitors the key parameters of operation in real time, and the software of key parameters is adjustable;
Remote management, calibration of coal quality parameters and query of measurement data by network;
Remote fault diagnosis, maintenance and software upgrade;
Provide database interface, ModBus, etc. Data sharing and programming of ash analyzer based on network.
ZZ-89B off-line scanning γ -ray coal ash analyzer has a unique patented technology of γ -ray beam scanning to measure coal samples, which ensures the equal weight measurement of most coal samples. Therefore, even if the ash distribution is uneven, the reliability of one measurement is very good, which greatly facilitates the practical use. For a coal sample, the root mean square error is about 0.2%~0.3%, which is about 3 times better than other off-line measurement methods.
ZZ-89B ash analyzer is widely used to monitor the incoming coal quality of coking plants and power plants, and to monitor the coal ash content of various processes in coal washing plants.
Performance index: measurement accuracy of coal; Clean coal (ash
Effect of moisture: for every change of moisture 1%, the measured value of ash generally changes by about 0.05%~0. 1% (related to coal type);
Stability: continuously measure the standard block, and take any 8-hour measurement results. The maximum deviation between any "10 min ash" value and the average value shall not exceed 0.5%;
Repeatability: the same sample is re-barreled for many times, and the root mean square error is about 0.2%~0.3%.
function
Without complicated sample preparation, the ash content of the sample can be determined in 3~5 minutes;
Provide detailed historical ash measurement data query function;
The influence of slow drift of automatic calibration instrument and attenuation of radioactive source;
The measurement results can be queried remotely through the network;
Can store a variety of coal quality parameters, the number is not strictly limited.
ZZ-89G steel wire belt on-line coal ash analyzer.
Application background
In some large coal production and transportation enterprises, because of its large coal transportation volume, in order to improve the strength, life and safety of coal transportation belts, embedded steel wire rope belts are often used. The commonly used on-line coal ash analyzer is applied to steel wire rope belt, and its measurement results will be affected by steel wire rope, resulting in greater errors.
Our products solve this problem with unique design, and can be applied to the steel wire rope belt coal conveying system, and the ash measurement is not affected by the steel wire rope in the belt.
Technical difficulties
The commonly used coal ash detection technology is dual-energy γ -ray transmission attenuation technology, whose disadvantage is that the ash measurement results are greatly influenced by the change of iron content. If this ash meter is installed on the steel wire belt, belt deviation and jitter will inevitably occur during the working process, and the steel wire will strongly absorb low-energy rays, and the intensity attenuation of low-energy rays will change strongly with the lateral movement of the belt, which is one of the main parameters of ash calculation, so there will be a big error, which will lead to the normal use of the ordinary ash meter on the steel wire belt.
solution
Through a unique design scheme, the influence of steel wire on ray attenuation is fixed no matter how the steel wire belt shakes, and then the influence of steel wire is eliminated through zero calibration, so that the on-line ash analyzer can be applied to steel wire belt.
Performance index: measurement accuracy of coal; Clean coal (ash
It has the basic functions of ordinary ash analyzer;
Can measure the ash content of coal conveyed by wire rope belt;
The main interface displays various ash data and system information;
You can query the ash history in various forms;
Provide remote LED ash indicator for field operators;
Provide 4-20mA analog, serial communication, network communication and other interfaces for connecting other user systems;
Client software providing remote data monitoring and query;
The ash analyzer program runs in hierarchical management, and only personnel with management authority can modify and set the operation parameters.
Application effect
Now we have applied for a patent and authorized it, and successfully applied several sets in coal enterprises. The application effect is ideal, and the measurement accuracy is equivalent to other products of our company. The system has been running for a long time and is stable and reliable.
Examples of field applications are as follows:
In a coal preparation plant in Shanxi, the ash content of coal is between 8- 1 1, and the measured accuracy is 0.47%.
In a coal preparation plant in Shanxi, the ash content of coal is between 20 and 35, and the measured accuracy is 65438 0.23%.
In a coal preparation plant in Inner Mongolia, the ash content of coal is between 25 and 45, and the measured accuracy is 65438 0.33%.