Water jacket structure of gas-making furnace

The utility model discloses a water jacket structure of gas-making furnace. The water jacket structure comprises upper and lower collecting boxes and a furnace body, wherein each of the upper and lower collecting boxes is made from a semicircular ring tube; the furnace body is formed by surrounding a plurality of half tube elements in parallel; the upper and lower collecting boxes are fitted and welded with the half tube elements of the furnace body; a welding seam is formed between outer half tubes of the plurality of the half tube elements; inner tube bodies are welded to form an inner furnace body; a plurality of hump-preventing slag-breaking strips are arranged on the inner furnace body; and the plurality of hump-preventing slag-breaking strips are uniformly distributed in the form of a sine curve. The water jacket structure disclosed by the utility model is simple and reasonable, relative good in pressure bearing capacity of the furnace body, long in compression life, good in safety, capable of effectively avoiding low-temperature dew point corrosion, increasing the steam decomposition rate, lowering the in-furnace coal consumption and improving the producing and machining efficiency.