NJGC系列耐压式称重给煤机

NJGC series pressure type coal weighing feeder

一、产品概述product introduction

   NJGC型耐压式称重给煤机是火力发电厂燃煤锅炉与循环硫化床锅炉配套的理想设备。具有连续给煤、动态计量、精度高、并能有效匹配锅炉运行状态，自动控制热风反窜，使系统运行更为安全可靠，为现场管理、操作提供准确可靠的计量数据和控制手段，是适应锅炉运行工艺的先进计量给煤设备。

NJGC type pressure coal weighing feeder is coal-fired boiler matched with the circulating fluidized bed boilers ideal equipment of thermal power plant. With continuous feeding, dynamic state measurement, high precision, and can effectively match the running state of the boiler, automatic control of hot air anti channeling, to make the system more safe and reliable, supply the reliable accurate measurement data and control  way for site management, operation, is the advanced metering boiler operation process of coal weighing feeder equipment.

二、工作原理work principle

当煤通过控制闸门进入给煤机，皮带上煤的重量信号和皮带运行的速度信号一同传送到微处理控制器，自动计算出煤的瞬时流量。通过连续不断的比较设定流量与实际煤的瞬时流量，从而调节皮带运行的速度，使实际煤流量保持在设定流量值上。给煤机内部装有温度传感器，进行温度的检测，并与设定值比较，当达到临界点时，便输出开关量信号和控制系统，快速关闭煤流出口高温隔离闸门，从而达到阻止热风反窜的目的。

When the coal  through the control gate into the coal weiging feeder, the belt running speed signal and weight signal is transmitted to the micro processing controller, automatically calculate the instantaneous flow of coal. The transient flow through the continuous compare the setting flow and actual coal flow, to adjust the belt speed, so that the actual coal flow is maintained in the set value of flow. Coal feeder with internal temperature sensor to checking the temperature of the inside of the feeder, and compared with the set value, when it reaches the critical point, then switch quantity output signal and control system, quickly close the coal outlet temperature isolation gate, to prevent reverse flow of hot air.

三、技术指标Technical indicators

计量精度Measurement precision：±0.5%

压力承受Under pressure：≤0.35MPa

输送能力Transmission capacity：0.05～600t/h

输送胶带宽度Conveyor belt b：500～1400mm

输送长度Delivery length：≥1600mm（进料口中心线至出料口中心线距离The inlet center line to the outlet of the center line distance）

调速方式Speed control mode：变频调节Frequency regulation

控制器远程接口Controller interface：电流输出Current output：0～20mA或4～20mA（全隔离Full isolation）

控制器通讯接口Controller communication interface：RS232/RS485，标准modbus协议。Standard modbus agreement

工作温度Working temperature：≤80°C 

四、性能特点perbance characteristics

1、采用耐压式全封闭壳体，密封严密，不漏气漏尘，能够在0.35MPa环境下工作，同时，在壳体

      中部、头部、尾部设有观察窗，内部有防爆型照明灯，可方便观察给煤机的运行情况；

The pressure of full closed shell, tight sealing, no leakage of gas and dust, can work in the 0.35MPa environment, at the same time, in the shell central, head, tail is provided with an observation b, internal explosion-proof lamp, can be easily observed running of coal feeder;

2、快速断料装置：电动或气动式高温隔离闸门，有效防止热风反窜，安全性能高；

Fast cutting device: electric or pneumatic type high temperature isolation gate, effectively prevent the hot air anti channeling, high safety perbance.

3、落煤清扫系统：可连续或定时清扫机体内的积尘和落煤；

Coal cleaning system: can be continuous or regular cleaning machine body dust and coal;

4、完善的报警系统：堵煤、断煤、皮带跑偏、超温、超压检测报警装置，可在超出设定范围时快速

      关闭阀门并泄压；

To improve the alarm system: blocking coal, no coal, broken belt deviation, over temperature, over pressure detection and alarm device, can quickly beyond the set range valve close the gate and pressure relief;

5、全悬浮式直接称重结构（专利号：0236977.3），计量精确，稳定性好；

Suspended direct weighing structure (Patent No.: 236977.3), accurate measurement, good stability；

6、独特的皮带自动张力调节和自动纠偏功能，保证了皮带张力恒定，长期运行不跑偏。

Automatic belt tension unique regulation and automatic correction function, ensure the belt tension constant, long-term operation without deviation.

7、称重信号采用高精度的数字称重模块，数字传输技术，具有线路简单、无调节部件、分辨率高、信号无衰减、抗干扰强。  By using high precision digital weighing module, digital transmission technology, has the advantages of simple circuit, no adjustment parts, high resolution, no signal attenuation, no interference.

   8、控制器采用触摸显示技术，中英文图形化显示，向导操作方式，操作简单，无需记忆。The controller uses touch display technology，Chinese- English graphical display, guide mode of operation, operation simple, without memory.

   9、可接485通讯，CAN通讯，DCS,PLC等接口。It can connect 485 communications; CAN communication, DCS, PLC etc. interface.

   10、采用GPRS无线数传功能，可以短信报表、远程诊断、校秤等功能。

Using the GPRS wireless data transmission function, can SMS report, remote diagnosis, remote control scales and other functions.