意大利 ADEV 7873 氧化鋯煙氣分析儀
自熱式探頭,設計用于測量煙氣中的氧氣(最高 700°C)。設計用于測量煙氣中的氧氣,以提高以天然氣、輕油和重油、液化石油氣、生物質和煤炭為原料的大型鍋爐和發電廠的燃燒效率和燃料節省。
?可用作探頭輸出 ??4-20 mA 的發射器,或與控制單元/顯示器結合使用。
可測量氣體
氧氣 [O2]
主要特點
極端粗糙度
- 接觸工藝氣體的堅固材料
- 可連續或循環用于溫度高達 700°C 的煙氣
- 請勿損壞或變形
- 安裝和保護管使探頭適用于高粉塵煙氣,避免臟物質的磨損和粘附。
- 不同類型的過濾網和偏轉板可阻止氣流,以限制灰塵對傳感器的影響:
無關鍵部件
- 避免了潛在的關鍵解決方案,例如內部焊接、關鍵耦合以及參考大氣與測量大氣的分離:
易于使用和維修
- 直接插入煙囪或管道
- 無需從過程中移除探頭即可檢查校準
- 所有零部件均易于接近且可現場維修。
無需將探頭從安裝座上拆下即可更換傳感器組件。
歐洲合規性
- 低電壓指令 2014/35/EU
- EMC 指令 2014/30/EU
規格
Probe | |
---|---|
Accuracy | 0.1% O2 below 5% or 2% of reading above 5% |
Repeatability | ± 1% of reading (short term) |
Output Resolution | 0.01% O2 |
Response Time | Sensor: 0.1 sec. ; Overall system < 5 sec. |
Flue Gas Temperature | up to 700°C (on request up to 800°C) |
Insertion Length | 300 / 450 / 1000 / 1500 / 2000 mm |
Process Connection | Flange type |
Ambient Temp. Influence | Probe: max ± 0.005% of reading per °C. External head: max. 0.06% of reading per °C |
Atm. Pressure Influence | 1% of reading per 1% change in ambient pressure. |
Probe Head Protection | IP65 |
Head Temperature | -5°C…+55°C |
Weight | Probe 300/450 mm: 9 Kg. ; Probe 1000 mm: 10 Kg.; Probe 1500 mm: 11 Kg. ; Probe 2000 mm: 13 Kg. |
Wiring Connections | N°2 cable glands for cables max. 10 mm and inner terminal strip |
Pneumatic Connections | Calibration inlet: 1/8” NPT-F |
Measuring Principle | Zirconium Oxide (Zirconia). Micro-pod sensor technology with no need of reference air |
Humidity | 0….90% non-condensing |
Analog Output | 1 x 4-20 mA linear output proportional to range; max. load 500 Ω (or 350 Ω with galvanically insulated module) or logarithmic 50 mV/decade * |
Ranges | 0-5 / 0-10 / 0-25% O2 (to select at order) |
Diagnostic NV Logical Output (non-valid) | Logical Non Valid output from relay free contact. Normally supplied in fail safe condition (triggered relay and closed contact if not in alarm). Can be modified in filed |
Power Supply | 117 VAC ± 10%, 50/60 Hz, 350 VA |
*Output from probe when connected to a remote ADEV control unit | |
Control Unit | |
ADV222 specifications (common to all versions) | |
Analog Inputs | 2 x isolated |
Analog Outputs | 2 x isolated |
Output Resolution | better than 1×10.000 of FS |
Relays | N°2 relays SPDT, 230 VAC, nominal 2A (max 4A) ** |
Power Supply | 8…28 VDC ; 9…24 VAC |
Ranges | 0-25% O2 *** |
Operative Temperature | -20°C…+70°C |
Humidity | 0….90% non-condensing |
Led | Power supply (blue) – Cumulative inputs overload (red) – TX/RX (yellow/amber) |
Serial Interface | RS485 2-wire (Protocol ModBus-RTU) |
Line Impedance | 120 ohm |
Termination Type | External |
Max Speed | 57600bps |
Max No. of Nodes | 32 |
Protection | IP20 |
Weight | 900 gr. |
Connections | Removable screw terminals pace 5,08 mm |
Conductor Section | Max. 2,5 mmq |
Mounting | DIN rail |
***Threshold to be selected at order (factory set) or settable in field by PC with ADEV Easy Configurator or by display if ADbox or ADcaseM are selected | |
****Default range factory set. Modifiable on request at order on customer specification or by PC with ADEV Easy Configurator | |
Supplementary ADbox Specification | |
Protection | IP55 |
Weight | 8 Kg. |
Dimensions | 400 x 300 x 150 mm |
Display | LCD 2.42” OLED. Resolution0.01% |
Cable Entrance (bottom) | N°4 cable glands PG 13 / 9 / 7 |
Supplementary ADcaseM Specification | |
Protection | IP55 |
Weight | 10 Kg. |
Dimensions | 400 x 300 x 150 mm |
500 x 400 x 250 mm (with transformer) | |
Display | LCD 2.42” OLED. Resolution0.01% |
Cable Entrance (bottom) | N°4 cable glands PG 13 / 9 / 7 |
Pneumatic Connections | Calibration air inlets: 1/8” NPT-F |
Configurations | ADcaseM-1: Pressure reducer and manual valve |
ADcaseM-2: Pressure reducer and electro valve |
應用領域
使用任何類型燃料的工業鍋爐:天然氣、液化石油氣、輕油、重油、柴油、煤炭、生物質
公用事業鍋爐
回收鍋爐
低溫焚燒爐
發電廠
水泥窯
工業爐
煙氣處于溫度限制范圍內(700°C 以內)的其他燃燒過程
測量原理
分析所依據的測量原理與氧化鋯的使用有關,氧化鋯在高溫下可以表現得像固態電解質,在與不同 O 2濃度(分壓)接觸的兩個電極上產生電動勢,與以開爾文度 (°K) 為單位的溫度以及兩個壓力 PO?2?‘ 和 PO?2?”之間的比率的對數(根據能斯特眾所周知的比率)成正比:
E=RT/nF(Lg P0?2?‘/P0?2?“)
其中: R = 完美氣體常數(8.31 焦耳/度體積)
?????????????????????? F = 法拉第常數
?????????????????????? T = 絕對溫度(°Kelvin)
?????????????????????? n = 4
內部傳感元件基于專有的 ADEV 技術(微莢),并具有固態參考,完全消除了參考氣流的需要,使儀器在現場使用非常簡單實用。
- 無參考空氣
- 傳感器位于尖端
- 無氣體循環