| Great attentions have been paid to the techniques of converting agricultural waste into high-grade fuels. The technology of converting agricultural waste into straw densification briquetting of high-grade and high density has been lucubrated. It can improve rural living conditions, protect agricultural ecological environment, increase boorish income and promote agricultural sustainable development.By consulting more related data, the biomass shaping technology and its status have been compared to improve the design of the machine. Hydraulic bi-direction shaping machine designed by Henan Agriculture University is in keeping with the energy policy in our country, and has broad application front view. But there are some small problems in its extending process, so it is very necessary to redesign its struggle and make it more perfective.By foregoing experiments and analysis results, improving design have been done on the hydraulic system and the molding part, on the based of hydraulic driving, double direction shaping and double crock double-bucket. A high-pressure small flow proportioning pump has been added into the system, it can make the working pressure basic stable at the 10 MPa level. By doing this, the low pressure working time has been prolonged and the stabilization has been heightened, the colligation capability has been advanced. At last, this can solve the technical problem in biomass shaping technology in our country.A new hydraulic oil cooled equipment has been designed to replace the old one. By experimental research, the hydraulic shaping machine can work more than 10 hours normally and the hydraulic oil can stay on the normal level. The cooling effect is very outburst and meets the design.By the improving of the control system of the hydraulic biomass briquetting machine, the PLC has been chosen to replace the old control system. This makes the automate capability improving more. At the same time, a automatic alarm system and a emergency braking system have been added to make the machine more safe and stable.Based on the fluid power drive and two-direction briquetting, the hydraulic system and the HPB-III briquetting machine components were improved on design. Two-cylinder, double-valve, and double-piston technology has been used. After operation test, it showed that the operation pressure has dropped, the stability has enhanced and the overall performance has improved. The productivity achieves 500kg·h-1, unit energy consumption reaches to 70kWh·t-1, and the operation pressure was about 8MPa, basically solved the technical promotion problems of the briquetting machine.In order to justify the using capability of the hydraulic oil cooling system, experiments had been done to test the working temperature of the equipment. The results showed that the temperature has big influence on the production diameter. When the temperature become higher, the product is much easier to go out of the model and the shaping pressure is lower, but the shaping diameter is much bigger. The temperature has small influence on the production rate of the biomass shaping machine. When the temperature becomes lower, the specific energy consumption becomes lower and its cost is lower. But when the temperature is very low the evaporation capacity of the moisture in the product is smaller and this will makes it difficult to go out of the model, in the end the productivity is influenced. So on the basis of assure the shaping of the product, the working temperature should be in a suitable range. As a general, it is suitable at 230℃-250℃level.The experiment results showed that, the improving on the hydraulic system and the cooling system and the control system are a success, and the effects are notable.
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