The overall technical level of biogas engineering in our country is low and lack of self-innovation. Fermentation concentration is not high and in the process feed concentration is difficult to control. The equipment used is imperfect, poor reliable and of short service life, most of the biogas project is still using conventional anaerobic fermentation technology and equipment. As to the problems above, the device overcomes low feed concentration, high cost, low fermentation concentration, floating and long residence time of the existing straw biogas engineering.This device has absorbed the domestic and foreign advanced technology, and after three years of constant testing and continuous improvement, all technical indicators have reached the leading domestic level. The fermentation device mainly consists of fermentation tank, feeding device, horizontal mechanical stirring device, temperature control system and the scum hydraulic forced circulation system.Feeding device and scum hydraulic forced circulation system is in the upper part of the fermentation tank, the horizontal mechanical stirring device is in the fermentation tank, temperature control system is on the side wall of the fermentation tank. Crushed straw material is feeded through the feeding device to the fermentation tank, and mixed with the horizontal mechanical device. Overflowed liquid material is sended back to the fermentation tank via the scum hydraulic forced circulation system.

1. The device uses straw, waste vegetables and other agricultural waste to produce green new energy natural gas and biological organic fertilizer, of the background of environment pollution control, providing green energy and improving soil quality is meaningful; 2. The device realizes dry feeding of straw, replaces the traditional way of pump feeding, improves the efficiency and laid a solid foundation for high concentration of anaerobic fermentation; The device also realizes automatic floating layer breaking and real-time level monitoring and adjusting, all those provide a new development thought; 3. This device uses large scale anaerobic reaction device, efficient and complete combination of stirring technology. Matertials in the fermentation tank is well mixed and no dead Angle, high efficiency, simple operation, low cost, good mass transfer characters is reached. And the floating scum frenquently appeared in traditional biogas project can significantly reduced; 4. This device adopts high efficient waste heat recovery technology. Low grade waste heat generated in the project is collected and upgraded to meet the engineering needs and reduce the energy consumption and improve project overall profit; 5. The device used secondary solid-liquid separation technology, and secondary digeatate slurry recycle and reflux technology to reduce biological organic fertilizer production costs and reduce emissions of biogas slurry; the device uses PWS technology to upgrade biogas to natural gas and recover liquid carbon dioxide at the same time.

Since 2016, the device has been applied in three projects. The total contract value is 1.55 million yuan, and 0.8339million has invoice confirmed, and all belongs to the pingdu south village large straw biological gas project (contract total 1.15 million yuan). The main cost of artificial and travel expenses: design personnel is 5 people, design cycle is 4 months, the cost is about 500000 yuan. The project's profit is about 650000 yuan.

This project has been successfully approved by the national development and reform commission in 2016 pilot project budget investment plans of the biological natural gas and is also the only national approval in Qingdao so far. (2) The large scale biogas project of shandong province - zhucheng shun, agricultural science and technology co., LTD., approved by the national development and reform commission department. (3) The large scale biogas production and electric generation project of shandong province, shandong DE sheng industrial co., LTD., also approved by the national development and reform commission department. 2. Market share: in 2016, the national development and reform commission department approved 2 gas pilot projects in shandong province (all belong to subsidies for project construction ), and one is in Qingdao. This means the market share has alread reach 50%.

Chief designer:Rongbo Guo Other designers:Chuanshui Wang,Zhibing Zhao,Xiaofang Xia,Liang Zhang

The overall technical level of biogas engineering in our country is low and lack of self-innovation. Fermentation concentration is not high and in the process feed concentration is difficult to control. The equipment used is imperfect, poor reliable and of short service life, most of the biogas project is still using conventional anaerobic fermentation technology and equipment.

Design personnel is 5 people, design cycle is 4 months, the cost is about 500000 yuan. The project's profit is about 650000 yuan.

1, sales revenue: Since 2016, the device has been applied in three projects. The total contract value is 1.55 million yuan, and 0.8339million has invoice confirmed, and all belongs to the pingdu south village large straw biological gas project (contract total 1.15 million yuan). The main cost of artificial and travel expenses: design personnel is 5 people, design cycle is 4 months, the cost is about 500000 yuan. The project's profit is about 650000 yuan.The other two projects (contract value of 200000 yuan each) is signed recently. Project profit each is about 100000 yuan. Details: (1) the nancun straw biogas project of Qingdao HRHG ennergy technology co., LTD is located in pingdu. This project has been successfully approved by the national development and reform commission in 2016 pilot project budget investment plans of the biological natural gas and is also the only national approval in Qingdao so far. (2) The large scale biogas project of shandong province - zhucheng shun, agricultural science and technology co., LTD., approved by the national development and reform commission department. (3) The large scale biogas production and electric generation project of shandong province, shandong DE sheng industrial co., LTD., also approved by the national development and reform commission department. 2. Market share: in 2016, the national development and reform commission department approved 2 gas pilot projects in shandong province (all belong to subsidies for project construction ), and one is in Qingdao. This means the market share has alread reach 50%.