沼氣生物脫硫

　　Biodesulfurization of biogas

　　生物脫硫優(yōu)勢

　　Advantages of biological desulfurization

　　生物脫硫工藝具有的脫硫效率、處理費用低、運行穩(wěn)定、自動化程度、少二次污染的優(yōu)勢。生物脫硫去除率可以達到99%以上，是一般雙堿濕法脫硫無法比的，又由于其以生物代謝功能處理脫硫，不需要像濕法脫硫那樣大量使用藥劑，所以脫硫的成本是一般濕法脫硫成本的1/3—1/5。

　　The biological desulfurization process has the advantages of desulfurization efficiency, low treatment cost, stable operation, degree of automation, and less secondary pollution. The removal rate of biological desulfurization can reach over 99%, which is incomparable to general dual alkali wet desulfurization. Moreover, due to its biological metabolism function in treating desulfurization, it does not require the use of large amounts of chemicals like wet desulfurization, so the cost of desulfurization is one-third to one-fifth of the cost of general wet desulfurization.

　　生物脫硫技術分為三個單元：①脫硫洗滌單元 ②洗滌液生物再生（回用）單元 ③單質硫分離單元。工藝流程如下：

　　The biological desulfurization technology is divided into three units: ① desulfurization washing unit ② washing solution biological regeneration (reuse) unit ③ elemental sulfur separation unit. The process flow is as follows:

　　單元 --脫硫洗滌 ：堿性的生物洗滌液從洗滌塔頂部噴出，與從洗滌塔底部進入的含硫化合物（主要H2S）氣源逆流接觸，由于再生生物洗滌液中含有連多硫酸鹽類具有脫硫催化作用的物質，所以可以效吸收H2S，并且脫除得非常干凈。在集成脫硫工藝中，洗滌塔變成洗滌模塊，可以任意疊加而達到需要的量和處理精度。

　　Unit - Desulfurization washing: Alkaline biological washing solution is sprayed out from the top of the washing tower and comes into countercurrent contact with the sulfur-containing compound (mainly H2S) gas source entering from the bottom of the washing tower. Due to the presence of substances with desulfurization catalytic effects such as polysulfates in the regenerated biological washing solution, H2S can be effectively absorbed and removed very cleanly. In the integrated desulfurization process, the washing tower becomes a washing module, which can be stacked arbitrarily to achieve the required amount and processing accuracy.

　　第二單元--生物再生反應器：含有硫化物的富液從洗滌塔底部流入生物再生反應器，通過脫硫微生物的處理，完成生物洗滌液再生并恢復堿性。再泵入單元洗滌部分，重復使用。

　　Unit 2- Biological Regeneration Reactor: Rich solution containing sulfides flows from the bottom of the washing tower into the biological regeneration reactor. Through the treatment of desulfurization microorganisms, the regeneration of the biological washing solution is completed and the alkalinity is restored. Pump it back into the unit washing section and reuse it.

　　第三單元—單質硫分離：單質硫從單質硫分離池中以顆粒沉淀的方式分離出生物脫硫系統(tǒng)，分離后的清液回流去生物再生反應器。

　　Unit 3- Separation of elemental sulfur: elemental sulfur is separated from the elemental sulfur separation tank by particle precipitation in the biological desulfurization system, and the separated clear liquid is refluxed to the biological regeneration reactor.

　　2.工藝使用設備描述

　　2. Description of process equipment used

　　(1) 洗滌塔

　　(1) Washing tower

　　由于生物堿性洗滌液的特性，洗滌塔的材質選擇FRP（玻璃鋼），洗滌塔的數(shù)量：1臺；材質：FRP，內部填充填料、噴淋及除沫裝置等。

　　Due to the characteristics of biological alkaline detergent, the material of the washing tower is FRP (fiberglass), and the number of washing towers is: 1 unit; Material: FRP, filled with internal fillers, spray and defoaming devices, etc.

　　(2) 再生反應器

　　(2) Regenerative reactor

　　在洗滌塔內吸收完成硫化氫后的洗滌液在生物再生反應器內，通過控制氧化過程，將吸收的硫化氫轉變成單質硫。

　　After absorbing hydrogen sulfide in the washing tower, the washing solution is transformed into elemental sulfur in the biological regeneration reactor by controlling the oxidation process.

　　(3) 板式換熱器

　　(3) Plate heat exchanger

　　由于氣候變化以及生物代謝能的釋放，生物再生反應器內的溫度可能會超出菌的承受溫度，需使用板式換熱器進行冷卻，冷卻水可使用循環(huán)水。

　　Due to climate change and the release of biological metabolic energy, the temperature inside the bioreactor may exceed the temperature that the bacteria can withstand. Plate heat exchangers are required for cooling, and circulating water can be used for cooling.

　　(4) 沉淀器

　　(4) Settler

　　沉淀器的作用就是分離硫元素，利于洗滌液的硫平衡。硫污泥將直接由硫污泥泵直接排至好氧池或廢水池。

　　The function of the precipitator is to separate sulfur elements, which is beneficial for the sulfur balance of the washing solution. The sulfur sludge will be directly discharged from the sulfur sludge pump to the aerobic tank or wastewater tank.

　　(5) 洗滌泵

　　(5) Washing pump

　　用于生物洗滌液的循環(huán)噴淋泵，1用1備，共2臺.

　　Two circulating spray pumps for biological detergent, one in use and one as backup(6) 鼓風機

　　(6) Blower

　　作用是提供生物再生所需要的氧氣，采用變頻控制，1用1備，2臺(7) 其他The function is to provide the oxygen required for biological regeneration, using variable frequency control, with one in use and one as backup, and two (7) others需配置：營養(yǎng)液計量泵、堿計量泵、硫污泥泵等均考慮了備用。

　　Required configuration: The nutrient solution metering pump, alkali metering pump, sulfur sludge pump, etc. are all considered as backup.

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