Biological desulfurization treatment project
I. Introduction of works
Safety: safety will be reflected in every detail of our specific planning and construction.
Environmental Protection: According to Jiangsu Santiandi Chemical Co., Ltd., nearly 21600 kg COD is converted into mixed methane every day, and the daily output of mixed methane should be 9750m?. After the bio-desulfurization process we have planned, we advocate that it should be used for biogas power generation, which is the choice with small investment and the highest economic benefit. Clean biogas can be generated by 16500kwh with a small generator every day. It can also be used for boiler combustion and so on. The purpose is to transform organic pollutants into power for enterprises. Our planned biological desulfurization is completely free of secondary pollution, converting the polluted sulfur compounds into elemental sulfur and re-entering the natural sulfur cycle.
Humanistic concern: our planning is reliable, highly automated, reduce labor intensity, do the closure and odor-free planning, is conducive to the health of workers.
Two. Engineering scale
The scale of the project includes: processing equipment, distribution, non-standard equipment planning and equipment production, acquisition and system installation, commissioning and so on.
Three. Brief introduction of biogas desulfurization process
This plan can be planned according to the waste water treatment. The total amount of COD removed every day is 21600kg, which is to treat 9750m biogas every day. The concentration of hydrogen sulfide in biogas before treatment (theoretical estimate) was 15 000 ppm, and the concentration of hydrogen sulfide in biogas after treatment was not more than 100 ppm.
本沼气生物脱硫工艺分三个单元：脱硫洗刷 -- 洗刷液生物再生（循环运用） -- 单质硫别离。如下图示：
The biogas desulfurization process is divided into three units: desulfurization scrubbing - biological regeneration of scrubbing solution (recycling) - elemental sulfur separation. The following illustration shows:
After completing the absorption mission, the alkaline biological H2S absorbent was collected and scrubbed at the bottom of the scrubbing tower, and then entered the scrubbing liquid bio-purification reactor. The microorganisms in the reactor converted the sulfide absorbed in the liquid into elemental sulfur, which together regenerated the scrubbing liquid and maintained its basicity. The elemental sulfur is separated from the system in the sulfur separator, which can be further utilized after dehydration or sold as fertilizer. The regenerated supernatant can be recycled to the scrubber to remove hydrogen sulfide from the gas.
Four. Process features:
1. high removal efficiency.
2. Recovery of alkali. Low operating cost - and traditional alkali washing method. Chemical oxidation (dry) desulfurization saves operating cost several times or even dozens of times;
3. strong resistance to load.
4., it's easy to start.
5. the automation level of the system can be very good.
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