1、廢氣管道上在線廢氣濃度檢測儀與廢氣切斷閥的距離

1. The distance between the online exhaust gas concentration detector on the exhaust gas pipeline and the exhaust gas cut-off valve

目前，RTO裝置在線度氣濃度檢測儀一般都設(shè)置2個，如并且在在線廢氣濃度檢測儀后一定距離處設(shè)置度氣切斷閥。當高濃度氣體經(jīng)過在線廢氣濃度檢測儀后，廢氣切斷閥應(yīng)在高濃度氣體到達前完全關(guān)閉。即在線廢氣濃度檢測儀到切斷閥的距離應(yīng)大于在線度氣濃度檢測響應(yīng)時間和廢氣切斷閥關(guān)閉時間總和內(nèi)氣體流經(jīng)的管道長度。

At present, RTO devices are generally equipped with two online gas concentration detectors, and a gas cut-off valve is installed at a certain distance behind the online exhaust gas concentration detector. After the high concentration gas passes through the online exhaust gas concentration detector, the exhaust gas cut-off valve should be completely closed before the high concentration gas arrives. The distance from the online exhaust gas concentration detector to the cut-off valve should be greater than the length of the pipeline through which the gas flows within the sum of the online gas concentration detection response time and the exhaust gas cut-off valve closing time.

2、新風(fēng)稀釋及風(fēng)機控制

2. Fresh air dilution and fan control

為降低爆炸風(fēng)險，RTO裝置應(yīng)增加相應(yīng)的邏輯控制，即當檢測到高濃度氣體時，RTO裝置觸發(fā)聯(lián)鎖停車，即廢氣緊急排放閥打開，廢氣切斷閥關(guān)閉，新鮮空氣閥門打開，主風(fēng)機降低風(fēng)量運行，確保爐內(nèi)一直進入較低濃度的氣體。

To reduce the risk of explosion, the RTO device should be equipped with corresponding logic control, that is, when high concentration gas is detected, the RTO device triggers interlocking shutdown, that is, the emergency exhaust gas discharge valve opens, the exhaust gas cut-off valve closes, the fresh air valve opens, and the main fan reduces the air volume to ensure that lower concentration gas always enters the furnace.

3、阻火器與爆破片問題

3. Issues with flame arresters and explosive discs

阻火器是非常重要的安全附件，阻火器必須經(jīng)過安全鑒定，確定其是否符合要求，不合格的阻火器將不能有效隔離能量的傳播，而導(dǎo)致閃爆事件。若爆破片爆破壓力和爆破面積不當，不能有效釋放能量，從而造成設(shè)備爆炸損壞等事故后果。較低的爆破壓力以及廢氣管道上多個爆破片的泄能部位，能有效防止設(shè)備和管道損壞，減少事故的發(fā)生。

Flame arresters are very important safety accessories, and they must undergo safety appraisal to determine whether they meet the requirements. Unqualified flame arresters will not be able to effectively isolate the spread of energy, leading to flash explosions. If the blasting pressure and blasting area of the explosive disc are not appropriate, it cannot effectively release energy, resulting in accident consequences such as equipment explosion and damage. The lower blasting pressure and multiple explosive discs on the exhaust gas pipeline can effectively prevent equipment and pipeline damage and reduce the occurrence of accidents.

4、風(fēng)機材質(zhì)選擇

4. Fan material selection

由于防腐蝕需要，有的風(fēng)機葉輪材質(zhì)選為非金屬，容易產(chǎn)生靜電，導(dǎo)致事故發(fā)生，建議選為金屬材質(zhì)，但考慮防腐措施。

Due to the need for anti-corrosion, some fan impellers are made of non-metallic materials, which can easily generate static electricity and cause accidents. It is recommended to choose metallic materials, but anti-corrosion measures should be considered.

5、操作壓力選擇

5. Selection of operating pressure

考慮到某些廢氣為有毒氣體，為防止正壓狀態(tài)下氣體泄漏對現(xiàn)場人員的人身傷害，RTO的操作壓力建議采用微負壓操作。同時，應(yīng)根據(jù)泄漏露點的位置設(shè)置相應(yīng)的有毒氣體檢測儀，泄漏點也應(yīng)安裝爆破片。

Considering that some exhaust gases are toxic, in order to prevent gas leakage under positive pressure from causing personal injury to on-site personnel, it is recommended to use micro negative pressure operation for the operating pressure of RTO. At the same time, corresponding toxic gas detectors should be installed according to the location of the leakage dew point, and explosive discs should also be installed at the leakage point.