Gas generator oven oven scheme
For the newly installed or overhauled gas generator, because the refractory bricks contain a large amount of or moisture, it must be baked and eliminated, otherwise, under the action of high temperature during driving, the refractory brick wall is subjected to severe thermal expansion and rapid evaporation of water to produce cracks, which affects the service life of the equipment, and even causes the collapse of the refractory brick wall. Therefore, oven operation is mandatory.
1. Preparation before oven:
The preparation work before the oven includes organizing personnel to inspect and prepare materials for equipment, process, and safety, and conduct a comprehensive and detailed inspection of the gas furnace and ancillary equipment according to the technical requirements of equipment installation and equipment quality standards.
1,After the furnace (including the steam drum, the connecting pipe between the steam drum and the water jacket and the corresponding instrument) is installed, the empty furnace test must be carried out, and the idling for 24 hours to observe whether all parts are normal. (The coaling system and slag removal system are running smoothly)
2,Gas stoves, purification equipment, and gas pipelines should be tight, the water seal should be normal, and bell valves, explosion-proof valves, and discharge pipes must be safe and reliable.
3,Check whether the water level gauge, pressure gauge, safety valve, water inlet valve, etc. are flexible, fill the furnace water jacket and steam drum, and the water level of the steam drum is 1/3~1/2, and fill the water seal everywhere.
4,The electrical equipment and power supply system of the whole station are in good condition, and they are in a state of being ready to be put into operation at any time, and all the indication instruments and automatic control systems are sensitive and reliable.
2. Oven
1. Before the oven, the slag block of 25~50mm and carbon content of <12% should be loaded into another part from the manhole and the other part should be added to the furnace with a smelter from the top coal bunker, the slag remover should be opened, the ash tray should be rotated to loosen the slag, and the slag should be transferred out of the ash tray, and the slag should be added to the hood above 200mm, which is in the shape of a steamed bun.
2,The upper section of the release valve is opened, all the fire holes are opened, the inlet of the first-stage electric coke capture is cut off, the release valve and the wet disc valve are overflowed at a high level, and the ash disc is added with water to the edge of 500mm.
3,Φ100mm long 400mm firewood is loaded on top of the slag, a little cotton yarn soaked in organic oil is spread between the firewood, a torch is lit, and the firewood is put into the furnace from the manhole to ignite the firewood.
4,After ignition, adjust the natural suction valve, and according to the situation, open and close the suction valve as needed to control the initial temperature with the amount of firewood.
5,With the increase of furnace temperature (350°C), add coke (or anthracite) appropriately, close the manhole cover, and open the fan to supply air as needed according to the heating curve, adjust the air volume, and maintain the required heating rate of the oven.
6,When drying the oven, we must strictly control the heating rate, especially 150 °C, 350 °C, 550 °C, there must be enough heat preservation time and slow heating speed, when it rises to 800 °C, keep warm, and then slowly cool down, the oven ends.
3. Notes:
1. When drying the oven, it must strictly follow the heating curve and fluctuate up and down by 5°C.
2,It is strictly forbidden to heat and cold the oven when baking.
3,The temperature of the heating curve is subject to the field record.
4,The temperature should be controlled by the thickness of the coal seam and the air supply, and it is strictly forbidden for the coal seam to exceed the fire detection hole.
5,The total heating time is 7 days, the heating time and the holding time can not be less than the upper number, and the furnace can be stopped after 800 °C and cooled slowly.