NJGC系列耐壓式稱重給煤機(jī)
NJGC series pressure type coal weighing feeder
一、產(chǎn)品概述product introduction
? ?NJGC型耐壓式稱重給煤機(jī)是火力發(fā)電廠燃煤鍋爐與循環(huán)硫化床鍋爐配套的理想設(shè)備。具有連續(xù)給煤、動(dòng)態(tài)計(jì)量、精度高、并能有效匹配鍋爐運(yùn)行狀態(tài)，自動(dòng)控制熱風(fēng)反竄，使系統(tǒng)運(yùn)行更為安全可靠，為現(xiàn)場管理、操作提供準(zhǔn)確可靠的計(jì)量數(shù)據(jù)和控制手段，是適應(yīng)鍋爐運(yùn)行工藝的先進(jìn)計(jì)量給煤設(shè)備。
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
當(dāng)煤通過控制閘門進(jìn)入給煤機(jī)，皮帶上煤的重量信號和皮帶運(yùn)行的速度信號一同傳送到微處理控制器，自動(dòng)計(jì)算出煤的瞬時(shí)流量。通過連續(xù)不斷的比較設(shè)定流量與實(shí)際煤的瞬時(shí)流量，從而調(diào)節(jié)皮帶運(yùn)行的速度，使實(shí)際煤流量保持在設(shè)定流量值上。給煤機(jī)內(nèi)部裝有溫度傳感器，進(jìn)行溫度的檢測，并與設(shè)定值比較，當(dāng)達(dá)到臨界點(diǎn)時(shí)，便輸出開關(guān)量信號和控制系統(tǒng)，快速關(guān)閉煤流出口高溫隔離閘門，從而達(dá)到阻止熱風(fēng)反竄的目的。
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、技術(shù)指標(biāo)Technical indicators
計(jì)量精度Measurement precision：±0.5%
壓力承受Under pressure：≤0.35MPa
輸送能力Transmission capacity：0.05～600t/h
輸送膠帶寬度Conveyor belt width：500～1400mm
輸送長度Delivery length：≥1600mm（進(jìn)料口中心線至出料口中心線距離The inlet center line to the outlet of the center line distance）
調(diào)速方式Speed control mode：變頻調(diào)節(jié)Frequency regulation
控制器遠(yuǎn)程接口Controller interface：電流輸出Current output：0～20mA或4～20mA（全隔離Full isolation）
控制器通訊接口Controller communication interface：RS232/RS485，標(biāo)準(zhǔn)modbus協(xié)議。Standard modbus agreement
工作溫度Working temperature：≤80°C?
四、性能特點(diǎn)performance characteristics
1、采用耐壓式全封閉殼體，密封嚴(yán)密，不漏氣漏塵，能夠在0.35MPa環(huán)境下工作，同時(shí)，在殼體
? ? ? 中部、頭部、尾部設(shè)有觀察窗，內(nèi)部有防爆型照明燈，可方便觀察給煤機(jī)的運(yùn)行情況；
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 window, internal explosion-proof lamp, can be easily observed running of coal feeder;
2、快速斷料裝置：電動(dòng)或氣動(dòng)式高溫隔離閘門，有效防止熱風(fēng)反竄，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 performance.
3、落煤清掃系統(tǒng)：可連續(xù)或定時(shí)清掃機(jī)體內(nèi)的積塵和落煤；
Coal cleaning system: can be continuous or regular cleaning machine body dust and coal;
4、完善的報(bào)警系統(tǒng)：堵煤、斷煤、皮帶跑偏、超溫、超壓檢測報(bào)警裝置，可在超出設(shè)定范圍時(shí)快速
? ? ? 關(guān)閉閥門并泄壓；
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、全懸浮式直接稱重結(jié)構(gòu)（專利號：0236977.3），計(jì)量精確，穩(wěn)定性好；
Suspended direct weighing structure (Patent No.: 236977.3), accurate measurement, good stability；
6、獨(dú)特的皮帶自動(dòng)張力調(diào)節(jié)和自動(dòng)糾偏功能，保證了皮帶張力恒定，長期運(yùn)行不跑偏。
Automatic belt tension unique regulation and automatic correction function, ensure the belt tension constant, long-term operation without deviation.
7、稱重信號采用高精度的數(shù)字稱重模塊，數(shù)字傳輸技術(shù)，具有線路簡單、無調(diào)節(jié)部件、分辨率高、信號無衰減、抗干擾強(qiáng)。 ?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、控制器采用觸摸顯示技術(shù)，中英文圖形化顯示，向?qū)Р僮鞣绞剑僮骱唵危瑹o需記憶。The controller uses touch display technology，Chinese- English graphical display, guide mode of operation, operation simple, without memory.
? ?9、可接485通訊，CAN通訊，DCS,PLC等接口。It can connect 485 communications; CAN communication, DCS, PLC etc. interface.
? ?10、采用GPRS無線數(shù)傳功能，可以短信報(bào)表、遠(yuǎn)程診斷、校秤等功能。
Using the GPRS wireless data transmission function, can SMS report, remote diagnosis, remote control scales and other functions.
