Water-sealed valve

Abstract

The invention relates to a water-sealed valve which comprises a smoke inlet, a smoke inlet connecting pipe, a smoke outlet pipe, a shell, a water-sealed basin and a smoke outlet, wherein the smoke inlet is communicated with the shell by virtue of the smoke inlet connecting pipe; the water-sealed basin is arranged in the shell, the water-sealed basin is a container with an upward opening, the interior of the water-sealed basin is concave downwards, and the cross section of the water-sealed basin is in a shape like the Chinese character ao; the smoke outlet pipe is inserted into the shell, the low end of the smoke outlet pipe is inserted into the water-sealed basin, and the upper end of the smoke outlet pipe is communicated with the smoke outlet. When the water-sealed valve provided by the invention is placed in a chimney, the bottom space of the chimney is fully used, and the spot space is not occupied; when the water-sealed valve is placed outside the chimney, the smoke inlet can be directly connected with an inlet pipeline which is low or even close to the ground, so that the inlet pipeline is simplified, and the cost is greatly saved; for a long-sealed chimney, the sealing effect is better than that of a flue butterfly valve, and the smoke leakage risk which occurs during long-period operation of the device and the environmental hazard caused by leakage are eliminated.

Description

technical field [0001] The invention belongs to the technical field of gas-phase medium water-sealed tanks in the petrochemical industry, and mainly relates to a water-sealed valve. Background technique [0002] With the strict implementation of national environmental protection laws and regulations, it is generally necessary to add a flue gas desulfurization and deodorization system after the waste heat boiler in the catalytic cracking unit in the petrochemical industry. After adding the desulfurization and denitrification system, it is necessary to install a cut-off device between the waste heat boiler and the chimney to cut off the flue gas from the chimney and flow to the desulfurization and denitrification system. The distance between the waste heat boiler and the chimney in many catalytic cracking unit systems is very close. At the same time, the elevation of the waste heat boiler outlet and the flue gas pipeline is very low (close to the ground). Large traditional wa...

AI Technical Summary

Problems solved by technology

The distance between the waste heat boiler and the chimney in many catalytic cracking unit systems is very close. At the same time, the elevation of the waste heat boiler outlet and the flue gas pipeline is very low (close to the ground). Large traditional water-sealed tanks can only be equipped with flue butterfly valves to cut off the flue gas

Although installing a flue butterfly valve saves space, its disadvantage is that it is prone to leakage after a period of use. Once the leakage of flue gas will go directly from the chimney, it will bring environmental protection hazards, affect the long-term operation of the entire device, and bring economic benefits to the enterprise. unnecessary loss

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