目前就化工企業(yè)產生的廢氣來說，絕大多數不具備回收利用的價值，RTO蓄熱式焚燒爐設備是適合化工企業(yè)的廢氣治理方式。RTO蓄熱式焚燒爐設備的廢氣處理方式是將廢氣焚燒成為二氧化碳和水，并且不會產生二次污染，燃燒廢氣過程中所產生的高溫熱能也能夠進行回收利用，并不會造成過多的經濟成本。RTO蓄熱式焚燒爐與守舊的催化燃燒、直燃式熱氧化爐（TO）相比，具有熱速率不錯（≥）、運行成本還行、能處理大風量中低濃度廢氣等特點，濃度稍高時，還可進行二次余熱回收，降低生產運營成本。

At present, the vast majority of waste gas generated by chemical enterprises does not have the value of recycling. RTO thermal storage incinerator equipment is a suitable waste gas treatment method for chemical enterprises. The waste gas treatment method of RTO thermal storage incinerator equipment is to incinerate the waste gas into carbon dioxide and water, without generating secondary pollution. The high-temperature heat generated during the combustion of waste gas can also be recycled and reused, without causing excessive economic costs. Compared with traditional catalytic combustion and direct combustion thermal oxidation furnaces (TO), RTO thermal storage incinerators have the characteristics of good heat rate (≥), decent operating costs, and the ability to handle high air volume and low concentration waste gas. When the concentration is slightly high, they can also be used for secondary waste heat recovery, reducing production and operation costs.

RTO蓄熱室內的腐蝕分高溫氧化腐蝕和高溫下特別離子的腐蝕、偏流造成的熱應力腐蝕以及燃燒過程中氧化還原交替性腐蝕，此類腐蝕用ZS-811經得起高溫涂料或ZS-821陶瓷涂料可解決。而在蜂窩陶瓷蓄熱體上，可涂刷ZS-1061不怕高溫遠紅外輻射涂料增強陶瓷的蓄熱能力，提升換熱速度，減小蓄熱體的體積，并可提升其抗熱震穩(wěn)定性。

The corrosion inside the RTO thermal storage chamber can be divided into high-temperature oxidation corrosion, corrosion caused by special ions at high temperatures, thermal stress corrosion caused by bias current, and alternating oxidation-reduction corrosion during combustion. This type of corrosion can be solved by using ZS-811 high-temperature coating or ZS-821 ceramic coating. On the honeycomb ceramic thermal storage body, ZS-1061 high temperature resistant far-infrared radiation coating can be applied to enhance the thermal storage capacity of the ceramic, improve heat transfer speed, reduce the volume of the thermal storage body, and improve its thermal shock stability.

廢氣中含有大量粉塵顆粒，循環(huán)熱交換部件會被高溫氣流沖刷磨損，是切換閥的頻繁動作磨損較快，積攢到程度會出現閥門密封不嚴、動作速度慢等問題，會大地影響使用性能。因此，切換閥可涂刷ZS-1031涂料進行防護。

The exhaust gas contains a large amount of dust particles, and the circulating heat exchange components will be washed and worn by high-temperature airflow. The frequent action of the switching valve will cause rapid wear, and the accumulation will lead to problems such as loose valve sealing and slow action speed, which will greatly affect the performance of use. Therefore, the switching valve can be coated with ZS-1031 coating for protection.

為了提升熱能利用率，還可以在RTO蓄熱焚燒爐后設置換熱器增加余熱利用，換熱器一般是選用ZS-722不怕酸導熱涂料或ZS-1021高溫合金封閉涂料進行防護。尾氣排放管道、引風機以及煙囪則是選用ZS-1041煙氣涂料就可以了。

In order to improve the utilization rate of heat energy, a heat exchanger can be installed behind the RTO thermal storage incinerator to increase the utilization of waste heat. The heat exchanger is generally protected with ZS-722 acid resistant thermal conductive coating or ZS-1021 high-temperature alloy sealing coating. The exhaust pipe, induced draft fan, and chimney can be coated with ZS-1041 smoke paint.

蓄熱燃燒設備已經被普遍應用于各行各業(yè)，在使用RTO蓄熱燃燒設備的過程中，穩(wěn)定問題是需要主要關注的。RTO系統(tǒng)的穩(wěn)定控制方法有哪些？

Thermal storage combustion equipment has been widely used in various industries, and stability issues need to be the main concern when using RTO thermal storage combustion equipment. What are the stability control methods for RTO systems?

在進行RTO系統(tǒng)設計時，需要優(yōu)先考慮到穩(wěn)定問題。

When designing an RTO system, stability issues need to be given priority consideration.

限制進入RTO爐的廢氣濃度，采用變頻稀釋風機調節(jié)稀釋風量的方法控制氧化爐進入口廢氣濃度。控制策略采用針對混合廢氣LEL的閉環(huán)調節(jié)，通過增減稀釋風機頻率，調節(jié)稀釋風量，控制廢氣進入口LEL。當LEL增加時，加大稀釋風量；當LEL減小時，減小稀釋風量。主要控制LEL在20%～25%，一般設定在20%并自動跟蹤。

Limit the concentration of exhaust gas entering the RTO furnace, and use a variable frequency dilution fan to adjust the dilution air volume to control the concentration of exhaust gas entering the oxidation furnace. The control strategy adopts closed-loop regulation for mixed exhaust gas LEL, by increasing or decreasing the frequency of the dilution fan, adjusting the dilution air volume, and controlling the exhaust gas inlet LEL. When LEL increases, increase the dilution air volume; When the LEL decreases, decrease the dilution air volume. The main control LEL is between 20% and 25%, usually set at 20% and automatically tracked.

疏排爐內富余熱量，通過控制燃燒室的溫度來調節(jié)熱旁通閥開度，當燃燒室的溫度升高時，開大熱旁通閥，增加送至余熱回收裝置的熱量；當燃燒室的溫度降低時，關小熱旁通閥，減少送至余熱回收裝置的熱量。若RTO系統(tǒng)未設置余熱回收裝置，可通過熱旁通閥將富余的熱量直接排至煙囪。

Drain the excess heat inside the furnace and adjust the opening of the thermal bypass valve by controlling the temperature of the combustion chamber. When the temperature of the combustion chamber rises, open the thermal bypass valve to increase the heat sent to the waste heat recovery device; When the temperature of the combustion chamber decreases, close the thermal bypass valve to reduce the heat sent to the waste heat recovery device. If the RTO system is not equipped with a waste heat recovery device, the excess heat can be directly discharged to the chimney through a thermal bypass valve.

當入爐濃度無法限制、富余熱量無法疏放或設備故障無法運行時，觸發(fā)系統(tǒng)聯鎖停爐。稀釋后混合廢氣濃度超限或稀釋風機故障跳閘判定為入爐濃度無法限制；熱旁通閥已全開但還有富余熱量、富余熱量超過余熱回收裝置限值判定為富余熱量無法疏放；蓄熱式切換閥故障，導致廢氣持續(xù)從一蓄熱室進一蓄熱室出，無法切換蓄熱室；燃燒室、蓄熱室、燃燒爐出入口管道溫度超限或故障，判定為系統(tǒng)故障，觸發(fā)聯鎖停爐。

When the concentration entering the furnace cannot be limited, excess heat cannot be dissipated, or equipment malfunctions and cannot operate, the system interlocking shutdown will be triggered. The concentration of the diluted mixed exhaust gas exceeds the limit or the dilution fan malfunctions and trips, indicating that the concentration entering the furnace cannot be limited; The thermal bypass valve is fully open but there is still excess heat. If the excess heat exceeds the limit of the waste heat recovery device, it is determined that the excess heat cannot be released; The malfunction of the thermal storage switching valve resulted in the exhaust gas continuously entering and exiting from one storage chamber, making it impossible to switch the storage chamber; If the temperature of the combustion chamber, heat storage chamber, and the inlet and outlet pipelines of the combustion furnace exceeds the limit or malfunctions, it is determined as a system fault and triggers an interlock shutdown.

蓄熱燃燒設備作為廢氣處理設備，也是有不適宜處理的廢氣存在的，那么RTO蓄熱燃燒設備適合處理什么廢氣？

As a waste gas treatment equipment, thermal storage combustion equipment also has unsuitable waste gas to be treated. So what waste gas is suitable for RTO thermal storage combustion equipment to treat?

蓄熱燃燒設備適合處理的廢氣：</p><p>1、物低濃度(同時達到低于25%LEL)、大風量。

Heat storage combustion equipment is suitable for treating waste gases:</p><p>1. Low concentration of substances (reaching less than 25% LEL) and high air volume.

含有容易使催化劑中毒或活性衰退成分的廢氣。

Waste gas containing components that can easily cause catalyst poisoning or activity decline.

廢氣中含有多種成分、或成分經常發(fā)生變化。

The exhaust gas contains multiple components or the components often change.

適用廢氣種類：烷烴、烯烴、醇類、酮類、醚類、酯類、芳烴、苯類等碳氫化合物廢氣。

Applicable types of exhaust gases: hydrocarbon exhaust gases such as alkanes, olefins, alcohols, ketones, ethers, esters, aromatics, benzene, etc.

蓄熱燃燒設備不適合處理的廢氣：

Waste gas that thermal storage combustion equipment is not suitable for processing:

易反應、易聚合的物，會發(fā)生自聚現象，產生高沸點交聯物質，會堵塞蓄熱體。

Substances that are easy to react and polymerize will undergo self aggregation, producing high boiling cross-linked substances that can block the thermal storage body.

易反應、易聚合的物，不宜采用蓄熱燃燒法處理。

Substances that are easily reactive and polymerizable should not be treated using thermal storage combustion method.

進入蓄熱燃燒裝置的物濃度，應高于其爆炸下限的25%。

The concentration of substances entering the thermal storage combustion device should be 25% higher than its lower explosive limit.

進入蓄熱燃燒裝置的廢氣中顆粒物濃度應低于5mg/m3，含有焦油、漆霧等黏性物質時應從嚴控制。

The concentration of particulate matter in the exhaust gas entering the thermal storage combustion device should be less than 5mg/m3, and it should be strictly controlled when it contains viscous substances such as tar and paint mist.