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生物脫硫器是如何達(dá)成其系統(tǒng)循環(huán)?

1、核心裝置脫硫反應(yīng)塔是將沼氣中氣相的H2S通過(guò)循環(huán)水中的氫氧根離子溶解到循環(huán)水中,形成液相硫化物,處理后的沼氣中不含空氣,對(duì)沼氣的后處理如沼氣提純提供了有力的條件。也保證了生物脫硫系統(tǒng)及整個(gè)后續(xù)沼氣處理的安全。脫硫反應(yīng)塔由玻璃鋼材料制造,根據(jù)每個(gè)項(xiàng)目的不同分別量身設(shè)計(jì),以保證佳的處理效果和經(jīng)濟(jì)的投資成本。
1. The desulfurization reaction tower of the core device dissolves the gas-phase H2S in the biogas into the circulating water through the hydroxyl ion in the circulating water to form liquid-phase sulfide. The treated biogas does not contain air, which provides powerful conditions for the post-treatment of biogas, such as biogas purification. It also ensures the safety of biological desulfurization system and the whole subsequent biogas treatment. The desulfurization reaction tower is made of FRP materials and designed according to different projects to ensure good treatment effect and economic investment cost.
2、生物再生池內(nèi)有空氣曝氣系統(tǒng)、加熱系統(tǒng)、加藥系統(tǒng)、補(bǔ)水系統(tǒng),提供循環(huán)水中微生物需要的溶解氧、生長(zhǎng)溫度、適應(yīng)的PH值及營(yíng)養(yǎng),通過(guò)脫硫微生物的作用,將再生池內(nèi)循環(huán)水中的硫化物在生物作用下轉(zhuǎn)化為單質(zhì)硫和氫氧根離子,單質(zhì)硫從循環(huán)水體內(nèi)析出,氫氧根離子又回到循環(huán)水中重復(fù)利用。
2. The biological regeneration tank is equipped with air aeration system, heating system, dosing system and water make-up system to provide dissolved oxygen, growth temperature, adaptive pH value and nutrition required by microorganisms in the circulating water. Through the action of desulfurization microorganisms, the sulfide in the circulating water in the regeneration tank is transformed into elemental sulfur and hydroxyl ions under the action of biomass, and the elemental sulfur is separated from the circulating water body, The hydroxyl ion returns to the circulating water for reuse.
3、沉淀池的作用是將單質(zhì)硫從循環(huán)水中分離出來(lái),單質(zhì)硫有較好的沉淀性能,因此,沉淀池尺寸較小,由于沉淀污泥有大量的脫硫菌,因此,沉淀污泥部分回到再生池內(nèi),保證再生池內(nèi)脫硫菌的數(shù)量。
3. The function of the sedimentation tank is to separate the elemental sulfur from the circulating water. The elemental sulfur has good sedimentation performance. Therefore, the size of the sedimentation tank is small. Because there are a large number of desulfurization bacteria in the precipitated sludge, part of the precipitated sludge returns to the regeneration tank to ensure the number of desulfurization bacteria in the regeneration tank.
沼氣脫硫
4、營(yíng)養(yǎng)液循環(huán)和營(yíng)養(yǎng)液投加系統(tǒng)
4. Nutrient solution circulation and nutrient solution dosing system
微生物生長(zhǎng)在循環(huán)水體內(nèi),循環(huán)水將脫硫反應(yīng)塔、再生池、沉淀池、循環(huán)水泵等連起來(lái)。噴淋系統(tǒng)可以讓沼氣和循環(huán)水充分接觸,以促進(jìn)硫化氫從氣相到液相的轉(zhuǎn)化,被微生物快速分解。微生物生長(zhǎng)需要一定的營(yíng)養(yǎng)元素,一般采用營(yíng)養(yǎng)液投加形式。營(yíng)養(yǎng)液加到循環(huán)水管路,加藥量由計(jì)量泵進(jìn)行精確控制。由于硫化物經(jīng)脫硫菌轉(zhuǎn)化為單質(zhì)硫和還原OH根離子,其中有2%的硫化物轉(zhuǎn)化為硫酸根,導(dǎo)致循環(huán)水的PH值逐漸下降,因此,需要不斷投加堿中和硫酸根離子,投加形式同營(yíng)養(yǎng)投加形式
Microorganisms grow in the circulating water, which connects the desulfurization reaction tower, regeneration tank, sedimentation tank and circulating water pump. The spraying system can fully contact the biogas and circulating water to promote the transformation of hydrogen sulfide from gas phase to liquid phase and be rapidly decomposed by microorganisms. Microbial growth requires certain nutrient elements, which are generally added in the form of nutrient solution. The nutrient solution is added to the circulating water pipeline, and the dosage is accurately controlled by the metering pump. Sulfide is transformed into elemental sulfur and reduced OH ions by desulfurizing bacteria, and 2% of sulfide is transformed into sulfate, resulting in the gradual decline of pH value of circulating water. Therefore, it is necessary to continuously add alkali to neutralize sulfate ions in the same form as nutrition
5、生物脫硫的化學(xué)方程式如下:
5. The chemical equation of biological desulfurization is as follows:
步:脫硫反應(yīng)塔內(nèi)的化學(xué)方程式:H2S(G) + OH -→ HS(L) + H2O
Step 1: chemical equation in desulfurization reaction tower: H2S (g) + OH - → HS (L) + H2O
第二步:再生池內(nèi)的化學(xué)方程式:HS(L) + 1/2O 2 → S+OH?
Step 2: chemical equation in regeneration tank: HS (L) + 1 / 2O 2 → S + Oh?
這兩步對(duì)沼氣脫硫系統(tǒng)都非常重要。步,H2S得到去除,同時(shí)消耗OH-,第二步,在再生池內(nèi)通過(guò)脫硫菌的作用,將硫化物生成單質(zhì)硫,OH -重新生成。單質(zhì)硫經(jīng)沉淀池沉淀從底部排出硫污泥,沉淀池的上清液回到循環(huán)水系統(tǒng)中,相比酸式生物脫硫會(huì)節(jié)約大量用水。
These two steps are very important for biogas desulfurization system. In the first step, H2S is removed and oh - is consumed at the same time. In the second step, sulfide is generated into elemental sulfur and oh - is regenerated through the action of desulfurization bacteria in the regeneration tank. The elemental sulfur is precipitated in the sedimentation tank, and the sulfur sludge is discharged from the bottom. The supernatant of the sedimentation tank returns to the circulating water system. Compared with acid biological desulfurization, it will save a lot of water.

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