[0022] see figure 1 , the present invention includes a high-temperature heating furnace 5 with a supporting and fixing member 7 inside, a coke-making reactor 4 is installed in the high-temperature heating furnace 5, and a protective gas inlet and a protective gas are opened on the end cover 2 of the coke-making reactor 4. The outlet and the explosion-proof door 1 of the coking reactor, the coking reactor 4 is also provided with a lifting hook 3, and the upper end of the side wall of the coking reactor 4 is provided with an outlet that communicates with a flue 15, and the flue 15 passes through the flue valve. 16. The condenser 14 is communicated with the tar collection container 8, and the upper end of the tar collection container 8 is also communicated with the pyrolysis gas collection container 9 with the exhaust pipe 10 through the pipeline, wherein the tar collection container 8 is installed with a tar collection container. Container explosion-proof door 13 ; the pyrolysis gas collection container 9 is provided with a pyrolysis gas collection container explosion-proof door 12 , and an exhaust pipe valve 11 is installed on its exhaust pipe 10 .
[0023] This system is suitable for producing highly reactive coke from straw biomass with high alkali metal content. The coking reactor 4 is made of refractory materials, the top of the reactor is equipped with an end cover 2, the end cover 2 is fastened on the reactor 4 by bolts, and the reactor is equipped with an explosion-proof door 1 to ensure the safe operation of the coking reactor. The inner wall of the furnace chamber of the electric furnace 5 is equipped with a support fixture 7 made of refractory materials to realize the fixation and positioning of the coke-making reactor, and to avoid uneven direct contact between the coke-making reactor and the furnace chamber; the end cover is equipped with an inert protective gas. In addition, a flue 15 is connected to the side wall of the coking reactor near the upper part, and is equipped with a control valve 16; the tar collection container 8 and the pyrolysis gas collection container 9 are respectively equipped with explosion-proof doors 13 and 12 to ensure collection The container is safe, and the pyrolysis gas collection container 9 is equipped with an exhaust pipe and a valve 11 to facilitate the timely discharge of the pyrolysis gas.
[0024] The method for preparing high-activity straw coke in the present invention is:
[0025] 1) Before coke making, firstly, the straw biomass with a particle size of 50-200 μm is filled into the coke making reactor 4, and the filling volume does not exceed 3/4 of the volume of the coke making reactor 4;
[0026] 2) The coking reactor 4 is placed in the high-temperature electric furnace 5, and nitrogen is introduced into the body through the protective gas inlet opening on the end cover 2 for more than 3 hours to drive off the residual air in the coking reactor;
[0027] 3) After the residual air is removed, control the high-temperature electric furnace 5 to raise the temperature to 775-825°C at a heating rate of 2-10°C/min, and then maintain a constant temperature for 4 hours;
[0028] 4) After the tar and flue gas produced by coking pass through the valve 16 and are input into the condenser 14 through the flue 15 for condensation, the tar enters the tar collection container 8, and the residual pyrolysis gas enters the downstream pyrolysis gas collection container 9 for storage;
[0029] 5) After the coking reactor 4 is finished, the coking reactor 4 is lifted out of the high-temperature electric furnace 5, and nitrogen gas is continuously supplied until the coking reactor 4 is cooled to room temperature, and the prepared coke sample can be taken out.
[0030] The advantages of the present invention are:
[0031] The present invention selects a reasonable coking temperature, avoids material sintering in the coking process, and obtains straw biomass coke with high activity;
[0032] The present invention selects reasonable particle size, heating rate and heating time, so that the obtained straw-like biomass coke has a high yield;
[0033] The tar and pyrolysis gas produced in the process of coke production are collected and utilized to realize the comprehensive and efficient utilization of straw biomass;
[0034] The system of the invention is simple in structure, easy to implement and operate, and the safety of each reactor and container is considered, and accidents are not easy to occur during use.
[0035] By controlling the constant temperature heating temperature, the straw-based coke with high reactivity can be prepared, and the reasonable particle size, heating rate and heating time can be selected to improve the yield of straw-based biomass coke. The gas is collected and utilized to realize the comprehensive and efficient utilization of straw biomass.
[0036] The selection of process parameters in this invention is based on scientific test results. The test shows that the porosity characteristics of wheat straw coke at a coking temperature of 800 °C are the most developed, and significant sintering occurs when the temperature is further increased to 1000 °C, and the coking temperature is The combustion activity index of straw coke obtained at 800℃ was the highest.
