秸稈不能燒，放著又占地方。秸稈氣發(fā)電機組給出的解決方案是：把秸稈變成可燃氣體，再用來發(fā)電。一條“廢棄物-清潔燃氣-綠色電力”的轉化鏈，讓秸稈從“負擔”變成“資源”。

Straw cannot be burned and it takes up space. The solution provided by the straw gas generator set is to turn straw into combustible gas and use it to generate electricity. A conversion chain of "waste clean gas green electricity" transforms straw from a "burden" to a "resource".

秸稈氣是怎么來的？

How does straw gas come from?

秸稈氣不是天然就有的，而是通過熱化學轉化產生的。秸稈、稻殼、木屑、果殼等生物質原料，在氣化爐中經歷干燥、熱解、氧化、還原四個階段，在缺氧條件下發(fā)生一系列化學反應，最終生成以氫氣（3%~9%）、一氧化碳（10%~18%）、甲烷（1.5%~2.1%） 為主要可燃成分的混合燃氣。

Straw gas is not naturally present, but is produced through thermochemical conversion. Biomass materials such as straw, rice husk, sawdust, and fruit shells undergo four stages of drying, pyrolysis, oxidation, and reduction in a gasifier. Under anaerobic conditions, a series of chemical reactions occur, ultimately producing a mixed gas mainly composed of hydrogen (3%~9%), carbon monoxide (10%~18%), and methane (1.5%~2.1%) as combustible components.

這種氣體熱值通常在5~6 MJ/Nm?（約1200~1400 kcal/Nm?），屬于低熱值燃氣，但足以驅動專用的燃氣發(fā)電機組穩(wěn)定運行。

Is the calorific value of this gas usually between 5-6 MJ/Nm? (About 1200~1400 kcal/Nm?)? ）It belongs to low calorific value gas, but is sufficient to drive the stable operation of dedicated gas generator sets.

發(fā)電機組如何適配低熱值燃氣？

How to adapt the generator set to low calorific value gas?

低熱值燃氣對發(fā)電機組提出了特殊要求，并非所有燃氣發(fā)動機都能直接使用。成熟的秸稈氣發(fā)電機組通常具備以下技術特征：

Low calorific value gas poses special requirements for generator sets, and not all gas engines can be directly used. Mature straw gas generators typically have the following technical features:

大排量發(fā)動機：采用缸徑大、行程長、排量大的機型（如300系列），在燃氣的熱值較低時仍能確保輸出功率持續(xù)恒定。

High displacement engine: using models with large cylinder diameter, long stroke, and large displacement (such as the 300 series), it can ensure continuous and constant output power even when the calorific value of the gas is low.

防回火進氣系統(tǒng)：秸稈氣含氫量不低，氫氣回火風險高。采用內混式進氣系統(tǒng)配合空燃比自動控制，使空氣和燃氣在進入氣缸后才混合，進氣管內沒有混合燃氣，從源頭杜絕回火放炮問題。

Anti backfire intake system: The hydrogen content in straw gas is not low, and the risk of hydrogen backfire is high. Adopting an internal hybrid intake system combined with automatic air-fuel ratio control, air and gas are mixed only after entering the cylinder, and there is no mixed gas in the intake pipe, thus eliminating the problem of backfire from the source.

低壓進氣適應性：自然吸氣機型對氣源壓力要求低（僅需>2kPa），對燃氣中焦油的容忍度也更高。氣源低壓輸送本身也更安全。

Low pressure intake adaptability: Naturally aspirated models require low gas source pressure (only>2kPa) and have a higher tolerance for tar in the gas. Low pressure transmission of gas source itself is also safer.

方便維護的設計：可拆卸進氣閥箱設計，不需拆卸缸蓋即可清理焦油——這對秸稈氣發(fā)電來說是剛需，因為氣化過程難免產生焦油，清理不及時會影響機組性能。

Convenient maintenance design: The detachable intake valve box design allows for the cleaning of tar without disassembling the cylinder head - this is essential for straw gas power generation, as tar is inevitably generated during the gasification process, and delayed cleaning can affect the performance of the unit.

低轉速長壽命：機組采用低轉速設計（通常1000r/min或1500r/min），機械磨損更小，年運行時間可達8000小時，大修周期長達60000小時。

Low speed and long lifespan: The unit adopts a low-speed design (usually 1000r/min or 1500r/min), with less mechanical wear, an annual operating time of up to 8000 hours, and a major overhaul cycle of up to 60000 hours.

系統(tǒng)構成：不只是一臺發(fā)動機

System composition: not just an engine

秸稈氣發(fā)電不是“氣化爐接上發(fā)電機”這么簡單。一套完整的系統(tǒng)包括五個部分：

Straw gas power generation is not as simple as connecting a gasifier to a generator. A complete system consists of five parts:

氣化爐：將秸稈原料轉化為粗燃氣

Gasification furnace: converting straw raw materials into crude gas

氣體凈化系統(tǒng)：旋風分離器除粉塵、濕式（或干式）凈化設備脫焦油、氣液分離設備除水分、靜電捕焦器深度凈化

Gas purification system: cyclone separator for dust removal, wet (or dry) purification equipment for tar removal, gas-liquid separation equipment for moisture removal, electrostatic precipitator for deep purification

出碳系統(tǒng)：回收氣化后的炭粉

Carbon extraction system: Recycling and gasifying carbon powder

發(fā)電機組：凈化后的燃氣驅動內燃機發(fā)電

Generator set: purified gas drives internal combustion engine to generate electricity

控制系統(tǒng)：自動控制進料、排料，實時監(jiān)控溫度、壓力、氣體成分

Control system: automatic control of feeding and discharging, real-time monitoring of temperature, pressure, and gas composition

凈化后的氣體溫度須低于40℃才能進入發(fā)電機組，過高的溫度會影響發(fā)動機燃燒效率。

The purified gas temperature must be below 40 ℃ before entering the generator set, as excessive temperature can affect the combustion efficiency of the engine.

本文由秸稈氣發(fā)電機組友情奉獻.更多有關的知識請點擊:http://www.seewest.cn真誠的態(tài)度.為您提供為全面的服務.更多有關的知識我們將會陸續(xù)向大家奉獻.敬請期待.

This article is a friendly contribution from the straw gas generator group For more information, please click: http://www.seewest.cn Sincere attitude To provide you with comprehensive services We will gradually contribute more relevant knowledge to everyone Coming soon.