河北純化水總有機碳分析儀  更換蠕動泵管

蠕動泵管在長期運行后會有磨損和老化現(xiàn)象，所以必須定期更換。

河北純化水總有機碳分析儀  更換泵管的操作步驟如下：

○1 關閉主電源開關，拔去電源線。

○2 按下泵頭下部的金屬彈片，彈出兩個塑料卡片。

○3 從甭管的接頭處拆下舊的蠕動甭管，取下套在甭管上的抱箍，將抱箍套在新

的蠕動泵管上，然后將新的甭管裝入儀器的接頭上，要注意抱箍的位置及方向。

○4 將甭管嵌入兩個塑料卡片，然后向下壓入卡位。按下時一定要注意甭管是否

入槽。

○5 調整卡片上的流速調節(jié)鍵，要注意調整的原則是：管路出液口的液體順暢自

然，無回流。條件允許的話，請使用高精度的量筒對出液速度進行測量，使液體的流

速與儀器的流速設置值相對應。

更換以上部件時存在問題可聯(lián)系儀器廠家解決。

UV 燈和蠕動泵管可以從本公司購買。 UV 燈為 185nm、254nm 雙波長紫外

燈，蠕動泵管為原裝進口泵管，具有很高可靠性和良好的穩(wěn)定性。

UV 燈的使用周期為 6 個月 ；蠕動泵管的使用周期為 12 個月。

以上時間為系統(tǒng)連續(xù)在線運行時間，當用采用間斷或離線運行時，更換周期將會更長，儀器會自動完成計數(shù)并決定何時告警。

主要配置

主機 一臺

觸摸屏 （鑲嵌到儀器中）

微型打印機   一臺

進樣管   一條

電源線  一套

產(chǎn)品說明書  一份

產(chǎn)品合格證  一份

產(chǎn)品裝箱單  一份

應用領域：

  制藥用水（純化水、注射用水）的在線監(jiān)測和實驗室測試，以及清潔驗證；環(huán)保測試、電子行業(yè)、食品行業(yè)等。

燃燒氧化法

其中燃燒氧化—非分散紅外吸收法優(yōu)勢是只需一次性轉化，流程簡單、重現(xiàn)性好、靈敏度高，缺點是探測器需頻繁校準，體積大及預熱時間長，必須使用酸、催化劑和載氣。

TOC分析儀主要由以下幾個部分構成：進樣口、無機碳反應器、有機碳氧化反應（或是總碳氧化反應器）、氣液分離器、非分光紅外CO2分析器、數(shù)據(jù)處理部分。

燃燒氧化—非分散紅外吸收法，按測定TOC值的不同原理又可分為差減法和直接法兩種。

⒈差減法測定TOC值的方法原理

水樣分別被注入高溫燃燒管（900℃）和低溫反應管（150℃）中。經(jīng)高溫燃燒管的水樣受高溫催化氧化，使有機化合物和無機碳酸鹽均轉化成為二氧化碳。經(jīng)反應管的水樣受酸化而使無機碳酸鹽分解成為二氧化碳，其所生成的二氧化碳依次導入非分散紅外檢測器，從而分別測得水中的總碳（TC）和無機碳（IC）。總碳與無機碳之差值，即為總有機碳（TOC）。

⒉直接法測定TOC值的方法原理

將水樣酸化后曝氣，使各種碳酸鹽分解生成二氧化碳而驅除后，再注入高溫燃燒管中，可直接測定總有機碳。但由于在曝氣過程中會造成水樣中揮發(fā)性有機物的損失而產(chǎn)生測定誤差，因此其測定結果只是不可吹出的有機碳值。

超臨界水氧化法

超零界水氧化（Supercritical Water Oxidation—SCWO）技術原先被用于處理大體積廢水、污泥和被污染

性能規(guī)格:

測量范圍：0.001mg/L～1.0mg/L（傳感器可定制，濃度可調節(jié)最達到1000mg/L，根據(jù)式樣要求傳感器定制調節(jié)到某一段濃度范圍）

精度：?4%測試范圍

分辨率：0.001mg /L

分析時間：連續(xù)分析

響應時間：4分鐘之內

檢測極限：0.001mg /L

樣品溫度：1- 95℃

重復性誤差：≤3%

電源要求/功能：220V

顯示屏：彩色觸摸屏

離線檢測

離線檢測時，儀器可從樣品瓶或其它沒有壓力的容器直接取樣。儀器管路沖洗和儀器校準應在離線狀態(tài)操作。若樣品中有不可溶性微粒，應經(jīng)過濾膜（孔徑60μm或更小）過濾后進入儀器，以防止樣品中的微粒阻塞儀器。儀器的進樣管為1/16英寸的Teflon管，經(jīng)蠕動泵抽進管路中的水樣流速約為0.5 ml/min。

系統(tǒng)組成

TOC分析儀的組成包括以下7個主要部分：

① 在線檢測裝置（在線型儀器配備）

② 樣品蠕動泵

③ 分流器

④ 氧化反應器

⑤ 二氧化碳傳感器

    ⑥ 微處理控制器和電子線路板

⑦ 輸出接口

 氧化反應器

儀器利用UV射線在二氧化鈦光催化劑的作用下將有機化合物氧化成二氧化碳，氧化反應器是一個UV燈外包螺旋形的石英管。UV燈發(fā)出185nm和254nm的光線，使水產(chǎn)生光分解。

H2O hν(185nm)（TiO2）? OH?  H?

羥基自由基（OH?）能完全把有機化合物氧化為二氧化碳。

有機物  OH?? CO2 H2O

UV燈的使用壽命為6個月，當更換時間到期時儀器將出現(xiàn)警告信息，提醒用戶更換UV燈。

Replace the peristaltic pump tube

The peristaltic pump tube will experience wear and aging after long-term operation, so it must be replaced regularly.

The steps for replacing the pump tube are as follows:

Turn off the main power switch and unplug the power cord.

Press the metal spring at the bottom of the pump head to pop out two plastic cards.

○3 Remove the old peristaltic pipe from the joint of the pipe, take off the clamp on the pipe, and put the clamp on the new one

Connect the peristaltic pump tube and then insert the new tube into the connector of the instrument, paying attention to the position and direction of the clamp.

Insert two plastic cards and press them down into the slot. Be sure to pay attention when pressing, regardless of whether it is pressed or not

Enter the slot.

Adjust the flow rate adjustment button on the card, and pay attention to the principle that the liquid at the outlet of the pipeline should flow smoothly

However, there is no backflow. If conditions permit, please use a high-precision measuring cylinder to measure the liquid outlet velocity and ensure the flow of the liquid

The speed corresponds to the flow rate setting value of the instrument.

If there are any problems when replacing the above components, please contact the instrument manufacturer for resolution.

UV lamps and peristaltic pump tubes can be purchased from our company. The UV lamp has dual wavelength ultraviolet of 185nm and 254nm

The lamp and peristaltic pump tube are original imported pump tubes with high reliability and good stability.

The usage cycle of UV lamps is 6 months; The service life of peristaltic pump tubing is 12 months.

The above time is the continuous online operation time of the system. When using intermittent or offline operation, the replacement cycle will be longer, and the instrument will automatically complete the counting and determine when to alarm.

Main configuration

One host

Touch screen (embedded in the instrument)

One micro printer

One injection tube

A set of power cords

One copy of product manual

One copy of product qualification certificate

Product packing list copy

Application areas:

Online monitoring and laboratory testing of pharmaceutical water (purified water, injection water), as well as cleaning validation; Environmental testing, electronics industry, food industry, etc.

Combustion oxidation method

The advantage of combustion oxidation non dispersive infrared absorption method is that it only requires one-time conversion, has a simple process, good reproducibility, and high sensitivity. The disadvantage is that the detector needs to be calibrated frequently, has a large volume and long preheating time, and must use acid, catalyst, and carrier gas.

The TOC analyzer mainly consists of the following parts: injection port, inorganic carbon reactor, organic carbon oxidation reaction (or total carbon oxidation reactor), gas-liquid separator, non dispersive infrared CO2 analyzer, and data processing part.

The combustion oxidation non dispersive infrared absorption method can be divided into two types based on different principles for determining TOC values: differential method and direct method.

Principle of the method for determining TOC value by subtraction method

The water samples were injected into high-temperature combustion tubes (900℃) and low-temperature reaction tubes (150℃) respectively. The water sample passing through the high-temperature combustion tube is subjected to high-temperature catalytic oxidation, converting both organic compounds and inorganic carbonates into carbon dioxide. The water sample passing through the reaction tube is acidified, causing inorganic carbonates to decompose into carbon dioxide. The generated carbon dioxide is then sequentially introduced into a non dispersive infrared detector to measure the total carbon (TC) and inorganic carbon (IC) in the water. The difference between total carbon and inorganic carbon is called total organic carbon (TOC).

2. Principle of direct method for determining TOC value

After acidifying the water sample and aerating it, various carbonates are decomposed to produce carbon dioxide, which is then removed and injected into a high-temperature combustion tube for direct measurement of total organic carbon. However, due to the loss of volatile organic compounds in the water sample during the aeration process, measurement errors may occur, so the measurement result is only the organic carbon value that cannot be blown out.

Supercritical water oxidation method

The Supercritical Water Oxidation (SCWO) technology was originally used to treat large volumes of wastewater, sludge, and pollution

Performance specifications:

Measurement range: 0.001mg/L~1.0mg/L (The sensor can be customized, and the concentration can be adjusted up to 1000mg/L. The sensor can be customized and adjusted to a certain concentration range according to the style requirements)

Accuracy:?4% Test range

Resolution: 0.001mg/L

Analysis time: continuous analysis

Response time: within 4 minutes

Detection limit: 0.001mg/L

Sample temperature: 1-95℃

Repetitive error:≤3%

Power requirement/function: 220V

Display screen: Color touch screen

Offline detection

When conducting offline testing, the instrument can directly sample from sample bottles or other containers without pressure. Instrument pipeline flushing and instrument calibration should be operated offline. If there are insoluble particles in the sample, they should be filtered through a filter membrane (with a pore size of 60μm or smaller) before entering the instrument to prevent particles from blocking the instrument. The injection tube of the instrument is a 1/16 inch Teflon tube, and the flow rate of the water sample drawn into the pipeline by a peristaltic pump is about 0.5 ml/min.

system composition

The composition of TOC analyzer includes the following 7 main parts:

①Online detection device (equipped with online instruments)

②Sample peristaltic pump

③Diverter

④Oxidation reactor

⑤Carbon dioxide sensor

⑥Microprocessor controllers and electronic circuit boards

⑦Output interface

Oxidation reactor

The instrument uses UV rays to oxidize organic compounds into carbon dioxide under the action of titanium dioxide photocatalyst. The oxidation reactor is a spiral quartz tube wrapped around a UV lamp. The UV lamp emits light at 185nm and 254nm to decompose aquatic products.

H2O hν(185nm)（TiO2）OH? H?

Hydroxyl radicals (OH?) can completely oxidize organic compounds to carbon dioxide.

Organic compounds OH?CO2 H2O

The service life of UV lamps is 6 months. When the replacement time expires, the instrument will display a warning message to remind the user to replace the UV lamp.