Overview:
NJGC type pressure metered tape stoker (weighing coal feeder) is coal-fired power plant boilers and circulating fluidized bed boilers ideal equipment. Has a connection to the coal, dynamic measurement, high accuracy, and can effectively match the boiler operation status, automatic control anti-channeling hot air to make the system run more secure and reliable for on-site management, operation to provide accurate and reliable measurement data and control means, is to adapt advanced metering technology to coal boiler equipment.
Model and meaning:
working principle:
Stoker coal use tape drag operation, when the tape is pulled out from the coal bunker, driven by the tape, the tape by friction between the moving weight and balance forward, in order to achieve a continuous, uniform coal .
Below the conveyor belt, there is mounted said idler, weighing bridge, weighing sensor, weighing weighing bridge is equipped with sensors mounted on the side frame of the conveyor, weighing bridge supporting said idler to detect the belt the weight of the material and produces a electrical signal proportional to belt loading, gave weighing indicator.
Speed sensor is connected to the drum, providing a series of pulses, each pulse represents the frequency of a belt motor unit, the pulse is proportional to the belt speed. After weighing indicator weighing sensor and speed sensor receives two signals, through amplification, shaping, A / D conversion process and integration operation on the meter's display shows the cumulative volume and instantaneous volume of coal transported.
Stoker internal temperature sensor for high temperature line detection, when the internal temperature is higher than the set value, the electronic control system will receive the alarm output signal from the temperature sensor and performs a fast motor and gate turn-off instruction to close the channel, cut off the stream, the purpose to protect the system equipment.
Equipment consists of:
It consists of a sealed box, conveyor systems, cleaning systems, measurement systems, temperature control protection system, electric gates and electrical control system, and can be expanded according to user requirements.
Features:
◆ closed pressure type tubular structure, effectively prevent dust spills, to ensure civilized production site;
◆ According to user requirements, it can also be designed outside the box in order to pull out the rack maintenance and repair;
◆ has a detuning, anti-bias structure to ensure normal and stable operation of transport;
◆ use of electronic belt excellent performance of the company, to ensure accurate and long-term stability of the calculation;
◆ weighing indicator with optional RS232 / 485 communication interface;
◆ The optional frequency stepless speed running smoothly, not only saving energy, but also to meet the site open or closed loop regulation requirements of different flow;
◆ chain scraper cleaning device can automatically clean the dust foreign objects inside the machine;
◆ Perfect alarm system can promptly detect and exclude block of coal, coal-off, overload, over-temperature fault belt deviation;
◆ Configure temperature isolation gate to prevent hot air reflow, providing convenience for the safe production and maintenance;
◆ DCS system with remote control interlocks, intelligent control;
The main technical parameters:
|
Body and gate voltage |
0.35MPa |
|
Measurement accuracy |
±0.5%/±0.25% |
|
Transmission capacity |
1-1000t/h |
|
Belt Width |
500-1400mm |
|
Expected out of the center distance |
≥1000mm |
|
Speed range |
0.05-0.5m/s |
|
Total power |
1.1-10kw |
|
Instrument output interface |
RS232 / 485,4-20ma, solid state relay pulse output |
|
Alarm contact |
Temperature alarm, blocking off the coal delay, belt deviation contact capacity 220VAC5A | |
