6results about "Preheating coke ovens" patented technology

The utility model relates to a device for a coal blending experiment of a coking enterprise, in particular to a double-carbonization chamber test coke oven device. A double-carbonization-chamber test coke oven device comprises a small coke oven, silicon carbide rods are matched in the small coke oven, carbonization chambers of the small coke oven are connected with an incinerator through smoke pipes on the upper portions of the carbonization chambers, stop valves are arranged in the smoke pipes, the incinerator is connected with a purification device through a pipeline, the purification device is connected with a purification fan through a pipeline, and an air outlet of the purification fan is connected with a chimney. Blended coal cakes are loaded into a small coke oven carbonization chamber to be tested, raw coke oven gas generated in the coal blending test is guided into an incinerator through a smoke pipe on the upper portion of the carbonization chamber, waste gas generated after incineration is purified through a purification device to reach the standard and then discharged into a chimney, and the overall power of the waste gas comes from a purification fan behind the purification device. The test coke oven system disclosed by the utility model adopts the small coke oven for testing, so that the requirement of coal blending proportion adjustment of coking enterprises can be met; and other waste substances are not generated in the test process, and the whole is environment-friendly and efficient.

The present application discloses a kind of coke oven positive pressure baking process, comprising the following method steps: step one: install positive pressure baking equipment in one side of coke oven, connect gas pipeline with the air inlet pipe of positive pressure baking equipment.The present application can evaporate most of the moisture of masonry through chimney by controlling the time of hot gas entering for 25 days, and the temperature of hot gas entering is 250 DEG C±30 DEG C, to avoid rapid heating, and the lining of furnace body is damaged due to the expansion of a large amount of water vaporization when coke oven heats up sharply.Then by controlling the time of hot gas entering for 20 days, and the temperature of hot gas entering is 350 DEG C±20 DEG C, then by controlling the time of hot gas entering for 23 days, and the temperature of hot gas entering is 520 DEG C±20 DEG C, then by controlling the time of hot gas entering for 14 days, and the temperature of hot gas entering is 600-900 DEG C, gradually preheat the coke oven, to avoid thermal stress caused by rapid heating to damage the coke oven, while the baking time is shortened, and the cost of baking is reduced.

This invention discloses a vertical rice husk carbonization furnace, relating to the field of carbonization furnace technology. It includes a carbonization furnace body, with a preheating chamber, a carbonization chamber, and an air-lock buffer chamber arranged from top to bottom inside the furnace. Isolation grates and fixing plates are respectively installed between the chambers. An air-lock plate is installed at the lower end of the fixing plate and the furnace body. A heat exchange box is located below the air-lock plate, containing a first heat exchange tube. Several second heat exchange tubes are installed in the preheating chamber. This invention employs continuous carbonization and negative pressure carbonization processes. The negative pressure inside the furnace is controlled at 0.3 kPa–0.6 kPa. A closed-loop heat exchange system is formed through multiple layers of heat exchange tubes. The second heat exchange tubes are parallel and interconnected with the first heat exchange tubes, efficiently recovering the waste heat from high-temperature carbonized rice husks to uniformly preheat the raw materials. Combined with the air-lock structure to isolate air, a low-oxygen, slightly positive-pressure carbonization environment is maintained, enabling continuous operation of rice husk preheating, carbonization, and buffer unloading. It also features waste heat recycling, low energy consumption, thorough carbonization, and environmental friendliness with no dust.

The utility model discloses a coke oven with a preheating function, which specifically comprises an oven body, a plurality of carbonization chambers are arranged in the oven body, the top of each carbonization chamber is respectively provided with an exhaust port and a feed port, a conveying cylinder is obliquely arranged and respectively arranged on one side of each carbonization chamber, a spiral shaft is rotatably arranged in the conveying cylinder, and the spiral shaft is connected with the feed port. The bottom of each spiral shaft is driven by a driving device to rotate; a heating bin is further arranged on one side of the furnace body, and the conveying barrels penetrate through the heating bin and are connected with the heating bin in a sealed mode. Each exhaust port is connected with the heating bin through an exhaust pipe, and gas exhausted by the carbonization chamber is introduced into the heating bin. During use, the spiral shaft drives coal to be conveyed to the top of the conveying barrel, when the coal passes through the interior of the heating bin, the coal in the conveying barrel is heated, finally the preheated coal enters the furnace body from the discharge pipe, and the coal is preheated for newly added coal in the decomposition process.

The embodiment of the invention provides a box-type coke oven and a method for realizing a heating flow field of the box-type coke oven. A first carbonization space and a second carbonization space are arranged in a hollow coke box, side wall air outlets are formed in the two sides of the hollow coke box, and a lateral airflow blocking structure extending in the height direction is combined; and a waste gas guide-out hole positioned between the two carbonization spaces on the coke box tray is used for guiding the flow directions of air and waste gas in the coke oven. Therefore, the problems of disorder and confusion of airflow in a traditional coke oven are solved, the airflow flow direction has guidance and directionality, control over heat distribution of a dry distillation area is achieved, heating is more uniform, the coking uniformity is promoted, and the coking heat efficiency is improved.

A device for the material treatment of raw materials includes a heating system, a distillation unit, a reaction unit, and a control device. The reaction unit can be charged with the raw materials for treatment. The heating system can be opened to be charged with the reaction unit, and closed. An exhaust gas line is provided to discharge exhaust gases from the reaction unit. The distillation unit has a cooling section with a device for forced cooling. Temperature sensors are provided in the region of the heating system and the distillation unit. An extraction device extracts gases from the reaction unit and generates negative pressure inside the reaction unit. The temperature sensors and the extraction device are connected to the control device. The device can be operated for the material treatment of raw materials to produce, for example, carbon.