不同規(guī)模的沼氣工程對脫硫技術(shù)和材料有哪些具體要求？

　　What are the specific requirements for desulfurization technology and materials for biogas projects of different scales?

　　不同規(guī)模的沼氣工程在選擇脫硫技術(shù)和材料時(shí)需要考慮多方面因素，以下是對不同規(guī)模沼氣工程具體要求的詳細(xì)分析。

　　When selecting desulfurization technology and materials for biogas projects of different scales, multiple factors need to be considered. The following is a detailed analysis of the specific requirements for biogas projects of different scales.

　　一、大型沼氣工程

　　1、 Large scale biogas project

　　技術(shù)要求：

　　Technical requirements:

　　通常采用較為復(fù)雜和高效的脫硫系統(tǒng)，以確保大量沼氣的高質(zhì)量處理。例如，濕法脫硫技術(shù)在大型沼氣工程中應(yīng)用廣泛。基于化學(xué)吸收法，設(shè)計(jì)的沼氣脫硫系統(tǒng)包括沼氣脫硫、脫硫液再生、單質(zhì)硫回收等多道工序，實(shí)現(xiàn)了高效脫硫、資源循環(huán)利用及回收等多重效果。

　　Typically, complex and efficient desulfurization systems are used to ensure high-quality treatment of large amounts of biogas. For example, wet desulfurization technology is widely used in large-scale biogas projects. Based on the chemical absorption method, the designed biogas desulfurization system includes multiple processes such as biogas desulfurization, desulfurization liquid regeneration, and elemental sulfur recovery, achieving multiple effects such as efficient desulfurization, resource recycling, and recovery.

　　在系統(tǒng)調(diào)試中，利用正交試驗(yàn)確定了對系統(tǒng)脫硫效果影響由大到小的各參數(shù)依次為溫度、HE101 投加量、pH（8～9），并確定了最佳工況為溫度 35～40℃，HE101 投加量 35～40g/d，pH8.3～8.6，Na2C03 投加量最佳范圍 25～30kg/d。

　　In the system debugging, orthogonal experiments were used to determine the parameters that have a decreasing impact on the desulfurization effect of the system, in order of temperature, HE101 dosage pH（8～9）， And the optimal operating conditions were determined to be temperature 35-40 ℃, HE101 dosage 35-40g/d, pH 8.3-8.6, and Na2C03 dosage in the optimal range of 25-30kg/d.

　　材料要求：

　　Material requirements:

　　核心設(shè)備尺寸及參數(shù)需根據(jù)沼氣產(chǎn)量和成分確定。如脫硫塔 DN2000×H12000，共 4 層，其中噴淋量 32.6 m3/h，噴淋密度 15.92m3/(m2.h)，液氣比 84.6L/m3；再生槽內(nèi)筒 DN1600×H2500、外筒 DN2000×H4500；富液罐 DN3000×H2500，貧液罐 DN2000×H1200，溶液加熱器加熱面積 13.5m2 等。

　　The size and parameters of the core equipment need to be determined based on the biogas production and composition. For example, the desulfurization tower DN2000 × H12000 has 4 layers, with a spray rate of 32.6 m3/h, a spray density of 15.92 m3/(m2. h), and a liquid to gas ratio of 84.6 L/m3; Regeneration tank inner cylinder DN1600 × H2500, outer cylinder DN2000 × H4500; Rich solution tank DN3000 × H2500, lean solution tank DN2000 × H1200, solution heater heating area 13.5m2, etc.

　　二、中型沼氣工程

　　2、 Medium sized biogas project

　　技術(shù)要求：

　　Technical requirements:

　　可以考慮采用生物脫硫與同步再生干法脫硫相結(jié)合的工藝。對于體量較大的污泥消化工程，該工藝在進(jìn)氣 H2S 含量為 4125～7425 mg/m? 的條件下，生物脫硫單元出氣 H2S 含量均小于 27 mg/m?，去除率達(dá)到 99% 以上，干法脫硫出氣均未檢出 H2S。在生物脫硫即可達(dá)到用氣設(shè)備要求的前提下，可采用將跨越干法脫硫作為應(yīng)急備用的運(yùn)行模式，以降低運(yùn)行成本、延長脫硫劑的更換周期。

　　A combination of biological desulfurization and synchronous regeneration dry desulfurization process can be considered. For large-scale sludge digestion projects, under the condition of inlet H2S content of 4125-7425 mg/m ?, the H2S content in the effluent of the biological desulfurization unit is less than 27 mg/m ?, and the removal rate reaches over 99%. No H2S was detected in the effluent of the dry desulfurization process. On the premise that biological desulfurization can meet the requirements of gas equipment, the operation mode of using cross dry desulfurization as an emergency backup can be adopted to reduce operating costs and extend the replacement cycle of desulfurizers.

　　材料要求：

　　Material requirements:

　　生物脫硫部分通常需要使用特定的微生物菌群和適宜的填料，以促進(jìn)微生物的生長和代謝。干法脫硫則需要選擇高效的脫硫劑，如氧化鐵等。

　　The biological desulfurization section usually requires the use of specific microbial communities and suitable fillers to promote microbial growth and metabolism. Dry desulfurization requires the selection of efficient desulfurizers, such as iron oxide.

　　三、小型沼氣工程（農(nóng)村戶用沼氣）

　　3、 Small scale biogas project (rural household biogas)

　　技術(shù)要求：

　　Technical requirements:

　　農(nóng)村戶用沼氣的脫硫問題相對簡單，但也需要重視技術(shù)問題。例如，要選擇合適的脫硫劑和脫硫設(shè)備，確保脫硫效果的同時(shí)，也要考慮成本和操作的便利性。

　　The desulfurization problem of rural household biogas is relatively simple, but technical issues also need to be taken seriously. For example, to choose suitable desulfurizers and desulfurization equipment, while ensuring the desulfurization effect, cost and operational convenience should also be considered.

　　可以采用一些成本較低、操作簡單的脫硫方法，如氧化鐵吸收法等干法脫硫技術(shù)。

　　Low cost and easy to operate desulfurization methods can be used, such as dry desulfurization techniques such as iron oxide absorption.

　　材料要求：

　　Material requirements:

　　常見的脫硫材料有氧化鐵等，這些材料價(jià)格相對較低，易于獲取和更換。同時(shí)，小型脫硫設(shè)備的體積和重量也需要適應(yīng)農(nóng)村戶用的環(huán)境和條件。

　　Common desulfurization materials include iron oxide, which are relatively inexpensive and easy to obtain and replace. At the same time, the volume and weight of small-scale desulfurization equipment also need to adapt to the environment and conditions of rural households.

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