上次小編給大家介紹了一部分關(guān)于沼氣脫硫提純工程里常用的檢測(cè)儀表，接下來小編就接著繼續(xù)給大家介紹，有需要的小伙伴可以收藏起來慢慢看哦~~
Last time Xiaobian introduced to you a part of the commonly used detection instruments in the biogas desulfurization and purification project, and then Xiaobian continued to introduce to you, small partners in need can be collected and read slowly.~~
1.液位檢測(cè)儀表
1. Level measuring instrument
液位檢測(cè)儀表是沼氣工程 控制系統(tǒng)常用僅表，早期液位檢測(cè)大多采用純機(jī)械式儀表，如今已普遍采用浸透了電子技術(shù)的機(jī)電一體液位檢測(cè)儀表。
Liquid level detection instrument is a common meter in the control system of biogas engineering. In the early stage, pure mechanical instrument was mostly used for liquid level detection. Now, electromechanical level detection instrument immersed in electronic technology has been widely used.
液位檢測(cè)儀表按丈量方式可分為連續(xù)丈量和限位丈量兩類。限位丈量儀表可稱液位開關(guān)，當(dāng)液位處于設(shè)定位置時(shí)發(fā)出相應(yīng)的開關(guān)信號(hào)，它在沼氣工程自動(dòng)控制中有諸多應(yīng)用。
The liquid level measuring instruments can be divided into two categories: continuous measurement and limit measurement. Limit measuring instrument can be called liquid level switch. When the liquid level is in a set position, it sends out the corresponding switch signal. It has many applications in the automatic control of biogas engineering.
2.濁度檢測(cè)儀表
2. Turbidity Detector
濁度是沼氣工程出水水質(zhì)指標(biāo)之一。濁度檢測(cè)儀根據(jù)光學(xué)辦法，以一定強(qiáng)度和波長的光映照被測(cè)液體，用光敏元件在恰當(dāng)位置以恰當(dāng)?shù)慕嵌葋頇z測(cè)透射光或散射光的強(qiáng)度，不同的光強(qiáng)惹起光敏元件產(chǎn)生不同的電信號(hào)，經(jīng)變送器轉(zhuǎn)換為與濁度值對(duì)應(yīng)的規(guī)范電信號(hào)輸出。
Turbidity is one of the effluent quality indexes of biogas project. According to the optical method, the turbidity detector reflects the measured liquid with a certain intensity and wavelength of light, detects the intensity of transmitted light or scattered light with the photosensitive element at an appropriate position and at an appropriate angle. Different light intensity causes the photosensitive element to produce different electrical signals, which are converted to the standard electrical signal output corresponding to the turbidity value by the transmitter.
3.固體懸浮物/污泥濃度檢測(cè)儀表
3. Solid Suspension/Sludge Concentration Detector
固體懸浮物/污泥濃度檢測(cè)儀表的檢測(cè)原理與濁度檢測(cè)儀表類似，可用于沼氣工程進(jìn)、出水的固體懸浮物的檢測(cè)。此儀表需設(shè)置清洗光學(xué)丈量部件的安裝。正式運(yùn)用前，應(yīng)在實(shí)驗(yàn)室用蒸餾法獲取丈量點(diǎn)水樣的固體懸浮物(或污泥）的真實(shí)濃度，以此對(duì)儀表停止標(biāo)定。
The detection principle of solid suspended solids/sludge concentration detector is similar to turbidity detector. It can be used to detect solid suspended solids in inlet and outlet water of biogas project. The instrument needs to be installed with cleaning optical measuring parts. Before formal application, the real concentration of solid suspended solids (or sludge) in measured water samples should be obtained by distillation method in the laboratory so as to stop the calibration of the instrument.
4.PH檢測(cè)儀表
4. PH Testing Instrument
PH檢測(cè)儀表的傳感器，可由丈量電極和參比電板組成復(fù)合電極，丈量電極通常采用PH玻璃電極，由于擴(kuò)散作用，被測(cè)液體中的氫離子進(jìn)入玻璃電極的球泡薄膜內(nèi)部，在里面的電極上構(gòu)成一定電位，參比電極提供一個(gè)與被測(cè)液體PH無關(guān)的恒定電位，經(jīng)過檢測(cè)丈量電極和參比電極之間的電位差，便可肯定被測(cè)液體的PH。
The sensor of PH measuring instrument can be composed of measuring electrode and reference plate. The measuring electrode usually adopts PH glass electrode. Because of diffusion, the hydrogen ions in the measured liquid enter into the bulb film of the glass electrode and form a certain potential on the inner electrode. The reference electrode provides a constant potential independent of the measured liquid PH. After testing the measuring electrode and the reference plate, the hydrogen ions in the measured liquid enter into the bulb film of the glass electrode. By referring to the potential difference between the electrodes, the PH of the measured liquid can be determined.
5.沼氣成分檢測(cè)儀表
5. Biogas Composition Detection Instrument
目前，國內(nèi)外對(duì)沼氣、生物自然氣制取過程中的氣體成分檢測(cè)多采用紅外(NDIR)、色譜(GC)、質(zhì)譜(MS)氣體剖析技術(shù)。這些技術(shù)在實(shí)踐應(yīng)用中存在不同的局限：GC運(yùn)用需求載氣和耗材，響應(yīng)時(shí)間長，性請(qǐng)求高；MS價(jià)錢昂貴，維護(hù)本錢高，操作復(fù)雜。NDIR剖析儀操作簡單，無耗材，但不能剖析對(duì)稱構(gòu)造無極性雙原子分子(O2、N2、H2)氣體，因而通常與電化學(xué)傳感器配合工作。
At present, infrared (NDIR), gas chromatography (GC) and mass spectrometry (MS) are widely used to detect gas components in the process of biogas and biogas production at home and abroad. These technologies have different limitations in practical application: GC needs carrier gas and consumables, long response time, high professional requirements; MS is expensive, high maintenance cost and complex operation. NDIR analyzer is simple to operate and has no consumables, but it can not analyse symmetrically structured non-polar diatomic molecules (O2, N2, H2) gas, so it usually works with electrochemical sensors.
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2019-05-17
