Summary of Project Commencement and Discussion on Issues
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This post was last edited by adsl121 on 2010-4-14 at 20:47. The device is ready to start operation; the furnace has just been dried, and the catalyst has been loaded. I would like to share and discuss with everyone the problems that occurred during the furnace drying process: First, when using the ignition gun to start the process, the negative pressure wasn’t controlled properly; after ignition, the flame would go out after 2 or 3 minutes. I then asked the manufacturer whether a fan was needed The manufacturer kept saying that the main air supply could not be turned on; after it kept shutting down, the fan was started and a small amount of main air was supplied, which resolved the issue. The sulfur project at the branch site started up one day later than ours, and encountered the same issue; the manufacturer wouldn’t allow the main air supply to be activated. Things returned to normal once the main air supply was enabled. I’d like to ask everyone why the main air supply is not turned on? Both of our 2 sets of equipment function properly only when the main air supply is turned on. II. Later, when the reactor was heated, after it reached 200 degrees, the temperature rose too rapidly, causing the inlet temperature of the reactor to drop quickly; this was attributed to a leak in the stem of the high-dilution valve and its valve seat flange. When the manufacturer arrived, they opened the cover of the high-doping valve and found that there was indeed a leak at the flange; the gasket used for connection was an octagonal one, and the bolts used to secure the flange could withstand temperatures of 500–600 degrees. When the temperature exceeded 600 degrees, the bolts stretched and the gaskets loosened, resulting in the leak. III. During the furnace drying process, water was found accumulated in the observation holes; I wonder how everyone dealt with this issue? Moreover, no flame could be seen through the viewing hole at the front of the incinerator; this might be a design issue. Initially, it was thought that the fire hadn’t been ignited, so later on people tried to observe the flame through the viewing hole on the side of the furnace. However, it was not possible to see the flame from that side either, making it difficult to adjust the air flow. After we start working, I will summarize and analyze the problems that arise. Everyone, please also talk about the problems you encountered when starting up your own installations, so we can prepare in advance. Thank you.
1. It is difficult to control the furnace temperature when it is between 200 and 300 degrees, and the fire tends to go out. The reason is that a large amount of water vapor is generated, causing the furnace to become foggy; the blower is used to expel this water vapor. We first start the main fan to circulate air through the furnace for 24 hours; since the temperature of the air at the fan’s outlet is around 100 degrees, this air is used to dry the furnace before igniting it for heating. Home-made ignition gun: the jacket tube carries gas, while the inner tube carries unpurified air, enabling temperatures of up to 400 degrees. 2. A wind reverse blow protection system should be installed at the ignition hole, using unpurified air or fan air; otherwise, sulfur will continue to accumulate even after normal operation begins.
Great resource, thanks for sharing. Looking forward to it!
The lessons learned from starting up the device are summarized as follows: 1. Start the blower and use it to purge for half an hour to establish a continuous flow. 2. Close the valves of the primary cooling cooler and the high-temperature mixing valve, and open the valve from the process gas-based sulfur waste heat boiler to the startup chimney. 3. Use a gentle breeze control valve to maintain a flow rate of 600–700 nm3/h. When starting the furnace, use a small gas burner; place the ignition gun inside the furnace to initiate ignition. The temperature should not be adjusted at levels between 150–250 degrees, as fluctuations in gas pressure can easily lead to the extinguishment of the flame. 4. The burner and viewing ports are protected by supplying air to prevent carbon deposition and sulfur formation. 5. During ignition, the negative pressure in the furnace must be well controlled to prevent the fire from going out. 6. Thermal tightening should be carried out at 250 degrees, as well as at 600 degrees and 1000 degrees. 7. Flame detectors may fail to detect flames when they are small. Temperature changes also need to be taken into account.