进塔气体质量差，气体夹带的煤灰、煤焦油和其它杂质等，长时间积累在填料上，形成塔阻力上升，产生塔堵。
The poor quality of gas entering the tower, coal ash, coal tar and other impurities entrained by the gas accumulated on the packing for a long time, resulting in the increase of tower resistance and tower plugging.
脱硫吸收和析硫反应，80%是在脱硫塔内进行的，塔内析出的硫，不能及时随脱硫液带出塔外，极容易粘结在填料表面，导致气体偏流，时间久了，形成堵塔。
80% of the desulfurization absorption and desulfurization reactions are carried out in the desulfurization tower. The sulfur precipitated from the tower can not be taken out of the tower in time with the desulfurization liquid. It is very easy to adhere to the surface of the packing, leading to gas bias and blocking for a long time.
溶液循环量小，形成脱硫塔，喷淋密度降低，一般要求喷淋密度在35-50立方米/㎡h，喷淋密度小，易使塔内填料形成干区，气液接触不好，脱硫效率下降，时间一长，就会形成局部堵塞，气液偏流，塔阻上升，造成塔堵。
Solution circulation is small, forming desulfurization tower, spraying density is reduced, generally requires spraying density of 35-50 cubic meters / h, spraying density is small, easy to make packings in the tower to form a dry area, gas-liquid contact is not good, desulfurization efficiency drops, a long time, will form a local blockage, gas-liquid bias, tower resistance rises, resulting in tower blockage.
脱硫系统设备存在问题，一是脱硫塔填料选择不当，脱硫塔气液分布器、再分布器及除沫器结构不合理或安装出现偏差。脱硫塔在检修时，仅将塔内填料扒出清洗，而未将堵塞在除沫器和驼峰板的两驼降之间的碎填料和积硫及时清理出去，造成除沫器和驼峰板的降液孔不畅通，以致开车后，形成气体偏流，塔阻上升。二是溶液再生有问题，硫浮选效果差，悬浮硫上升，脱硫效率下降。主要表现在，再生设备不配套，氧化再生槽设计上存在缺陷。有的厂氧化再生槽分布板孔径过大，一般分布板孔径为8-15㎜，孔距20-25㎜。
There are some problems in desulfurization system equipment. First, the packing of desulfurization tower is improperly selected, and the structure of gas-liquid distributor, redistributor and demister is unreasonable or the installation is deviated. During the overhaul of the desulphurization tower, only the packing in the tower is stripped out and cleaned, but the broken packing and sulphur accumulation blocked between the two camel drops of the demister and the hump plate are not cleaned out in time, resulting in the blockage of the falling liquid hole of the demister and the hump plate, which leads to the formation of gas bias flow and the rise of the tower resistance. Two, there is a problem of solution regeneration. The flotation efficiency of sulfur is poor, suspended sulfur rises and desulfurization efficiency decreases. The main performance is that the regeneration equipment is not complete, and there are defects in the design of the oxidation regeneration tank. Some plant oxidation regeneration tank distribution plate aperture is too large, the general distribution board aperture is 8-15, and the hole spacing is 20-25.
空气自吸式喷射器选用及安装不合理，吸空气量小，再生空气量不够，一般吹风强度在50-80立方米/㎡h。
Air self-priming ejector selection and installation is unreasonable, small air absorption, regenerated air is not enough, the general blowing strength in 50-80 cubic meters / h.
操作和管理不到位。操作中脱硫液温度过高,一般温度控制在38-42℃为宜,超过45℃则气泡易碎,单质硫浮选不好,生成副盐多,一般副盐三项(Na2S2O3\Na2SO4\NaCNS)之总和应小于250g/L。副反应增多，易析出结晶，形成盐堵，发生盐堵后，不仅使塔阻力上升，而重要的是引起设备严重腐蚀。发生盐堵后，再好的催化剂也是无能为力的，即使东狮牌888催化剂也只能对清洗硫堵有效果;氧化再生槽浮选出的硫泡不能及时溢流出去而在液面上停留时间过长，硫泡破碎后下降，形成溶液悬浮硫上升，由脱硫泵带至塔内，沉积在填料上，时间久了形成硫堵;溶液循环量不能保证稳定，调节过频，遇到减量时，可从溶液组份上来作些调整;吹风强度在经过操作摸索后，可稳定在最佳量，一般不宜作过多调节，否则会影响单质硫的浮选，导致再生效果不佳。催化剂选用不当，劣质催化剂价格虽较低，但在应用过程中，在塔内析出的单质硫不能及时随溶液带出去，时间久了，形成堵塔，严重时影响生产。
Operation and management are not in place. In operation, the temperature of desulfurization liquid is too high, the general temperature should be controlled at 38-42 C. When the temperature is over 45 C, the bubble is fragile, the elementary sulfur flotation is not good, and there are many accessory salts. The sum of the three general accessory salts (Na2S2O3_ Na2SO4_ NaCNS) should be less than 250g/L. The increase of side reactions is easy to precipitate and crystallize, forming salt plugging. After salt plugging, not only the tower resistance increases, but also serious corrosion of equipment is important. After salt blockage, the best catalyst is powerless, even the Dongshi 888 catalyst can only be effective for cleaning sulfur blockage; oxidation regeneration tank floated sulfur bubbles can not spill out in time and stay on the liquid surface for too long, sulfur bubbles break down and then drop, forming a solution of suspended sulfur rise, from the desulfurization pump to the tower, sink. Accumulated on the filler for a long time to form a sulfur plug; solution circulation can not guarantee stability, adjust too frequently, when meeting the reduction, can make some adjustments from the composition of the solution; blowing strength after operation, can be stabilized in the best amount, generally not too much adjustment, otherwise it will affect the flotation of sulfur, resulting in regeneration effect is not good Good. Improper selection of catalyst and lower price of inferior catalyst, but in the process of application, the elementary sulfur precipitated in the tower can not be taken out with the solution in time, for a long time, forming a blockage tower, seriously affecting production.