What are the precautions for loading, use, transportation and storage of large and medium-sized biogas wet desulfurization tower?

近年来，中国沼气产业发展迅速。作为一种新型能源，不仅得到了国家产业政策的支持，而且在一个富煤、低油、贫气的国家，对清洁能源的需求越来越大，沼气产业的发展空间越来越大。那么，大中型沼气湿法脱硫塔装载、使用、运输和储存的注意事项有哪些?

In recent years, China's biogas industry has developed rapidly. As a new type of energy, it is not only supported by the national industrial policy, but also in a country rich in coal, low in oil and poor in gas, the demand for clean energy is growing, and the development space of biogas industry is growing. Then, what are the precautions for loading, use, transportation and storage of large and medium-sized biogas wet desulfurization tower?

大中型沼气湿法脱硫塔装载、使用、运输和储存的注意事项有哪些?

What are the precautions for loading, use, transportation and storage of large and medium-sized biogas wet desulfurization tower?

1.装填前清洗脱硫塔，确定各层装填量。分两层或多层装载。

1. Clean the desulfurization tower before loading and determine the loading amount of each layer. Loading in two or more layers.

2.装炉时，先在炉壁上铺一层铁丝网和耐火球(或焦炭)，再铺两层20目左右的不锈钢网，装上脱硫剂。

2. When loading the furnace, first lay a layer of wire mesh and refractory balls (or coke) on the furnace wall, then lay two layers of 20 mesh stainless steel mesh and install desulfurizer.

3.脱硫剂应从尽可能低的高度轻轻倒入炉膛，颗粒自由下落的高度应小于0.5m。

3. The desulfurizing agent shall be poured into the furnace gently from the lowest possible height, and the free falling height of particles shall be less than 0.5m.

4.装填过程中，催化剂应分散均匀装填，不允许集中倾倒或只从一侧倾倒，以免装填不均匀，造成气偏。

4. During the loading process, the catalyst shall be loaded evenly, and it is not allowed to pour in a centralized manner or only from one side to avoid uneven loading and gas deviation.

5.装填时，操作人员应站在板上，严禁直接踩在催化剂上，以免产生新的粉末。

5. During loading, the operator shall stand on the plate and shall not directly step on the catalyst to avoid generating new powder.

装上催化剂后，用木板刮去表面，再盖上一层铁网和耐火球。

After the catalyst is installed, the surface shall be scraped off with wood, and then covered with a layer of iron mesh and refractory balls.

7.原料气中允许有适量的水蒸汽，但严禁带大量水或床内积水。塔前排水和塔底排水应定期排放。

7. A proper amount of water vapor is allowed in the feed gas, but a large amount of water or water in the bed is prohibited. The drainage in front of the tower and the drainage at the bottom of the tower shall be regularly discharged.

8.多塔操作时，应考虑气体通过的顺序，其工作硫容量应尽可能接近饱和。

8. During multi tower operation, the sequence of gas passing shall be considered, and the working sulfur capacity shall be as close to saturation as possible.

9.沼气湿法脱硫塔底部的阀门是出水口。注意排出积水。

9. The valve at the bottom of the biogas wet desulfurization tower is the water outlet. Pay attention to draining water.

脱硫工艺如何选择?

How to choose desulfurization process?

1、干法脱硫

1. Dry desulfurization

干法脱硫中常用的方法是常压氧化铁脱硫。常温常压下，沼气通过脱硫床，沼气中的硫化氢与活性氧化铁接触，生成硫化铁和硫化亚铁。然后再生，含有硫化物的脱硫剂与空气中的氧气接触。当水存在时，硫化铁转化为氧化铁和元素硫。这种脱硫和再生过程可以进行多次，直到氧化铁脱硫剂表面的大部分空隙被硫或其他杂质覆盖而失去活性。脱硫剂一旦失去活性，需要从塔中排出，在空地上摊开，然后在脱硫剂上均匀喷洒少量稀氨水，利用空气中的氧气进行自然再生。

The common method in dry desulfurization is atmospheric iron oxide desulfurization. Under normal temperature and pressure, the biogas passes through the desulfurization bed, and the hydrogen sulfide in the biogas contacts with the active iron oxide to generate iron sulfide and ferrous sulfide. The desulfurizing agent containing sulfide is contacted with oxygen in the air. When water is present, iron sulfide is converted to iron oxide and elemental sulfur. This desulfurization and regeneration process can be carried out many times until most of the voids on the surface of the iron oxide desulfurizer are covered with sulfur or other impurities and become inactive. Once the desulfurizing agent loses its activity, it needs to be discharged from the tower, spread out on the open space, and then evenly spray a small amount of dilute ammonia on the desulfurizing agent for natural regeneration using the oxygen in the air.

2、湿法脱硫

2. Wet desulfurization

湿法脱硫包括直接氧化法、化学吸收法和物理吸收法。目前国内常用的脱硫方法是直接氧化法，在液相中将硫化氢氧化成单质硫。工艺比较简单，可以直接得到单质硫。这种方法主要用于处理低浓度硫化氢和高浓度二氧化碳的气体。这种脱硫方法的缺点是溶液吸收硫化氢的硫容量低，所以溶液的循环量大，硫回收的处理量大。

Wet desulfurization includes direct oxidation method, chemical absorption method and physical absorption method. At present, the commonly used desulfurization method in China is direct oxidation method, which oxidizes hydrogen sulfide into elemental sulfur in the liquid phase. The process is simple, and elemental sulfur can be directly obtained. This method is mainly used to treat gases with low concentration of hydrogen sulfide and high concentration of carbon dioxide. The disadvantage of this desulfurization method is that the sulfur capacity of the solution to absorb hydrogen sulfide is low, so the circulation capacity of the solution is large and the treatment capacity of sulfur recovery is large.

3、干湿结合法脱硫

3. Wet and dry desulfurization

干湿法脱硫效率高，管理一体，综合的运行费用低，维护简单，设备寿命长，运行可靠，脱硫剂价格低廉。它能集脱硫脱水于一体，设备能长时间连续进行脱硫脱水。pH值用于控制初级脱硫效率。采用干法脱硫进行二次脱硫，脱硫率提高到99.8%。

Dry and wet desulfurization has high efficiency, integrated management, low comprehensive operation cost, simple maintenance, long equipment life, reliable operation, and low desulfurization agent price. It can integrate desulfurization and dehydration, and the equipment can continuously carry out desulfurization and dehydration for a long time. The pH value is used to control the primary desulfurization efficiency. Dry desulfurization was adopted for secondary desulfurization, and the desulfurization rate was increased to 99.8%.

以上就是为大家介绍的有关湿法脱硫的详细的介绍,希望对您有所帮助.如果您有什么疑问的话,欢迎联系我们.我们将以专业的态度,为您提供服务

The above is the detailed introduction of wet desulfurization for you. I hope it will help you. If you have any questions, please contact us. We will provide services for you with a professional attitude