Water-sealed valve device arranged in chimney and use method for water-sealed valve device

Abstract

The invention relates to a water-sealed valve device arranged in a chimney and a use method for the water-sealed valve device. When the water-sealed valve device is in a water-sealed cap type, the water-sealed valve device is arranged in the chimney (3) and comprises a smoke inlet (21), a water inflow and outflow port (22), an overflow port (23), a smoke outlet (24), a cone section (25), a water-sealed cap (26), an inner barrel (27), an outer barrel (28), an outer barrel bottom board (29) and a support (210). When the water-sealed valve device is in a conventional type, the water-sealed valve device is arranged in a chimney (3') and fixed to a foundation (1') through a support (210'), and a smoke inlet of the chimney (3') serves as a smoke inlet (21') of the water-sealed valve device. By the adoption of the technical scheme, the space at the bottom of the chimney can be fully used for containing a water-sealed tank, and the space of a site is not occupied. The sealing effect of the water-sealed valve device is better than that of a flue butterfly valve, and the smoke leakage risk existing during long-term operation of a device and the hidden environment protection danger 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 design method and equipment for installing a water-sealed valve in a chimney, that is, a water-sealed valve device installed in a chimney and its use method. 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. After th...

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Problems solved by technology

In many catalytic cracking unit systems, the distance between the waste heat boiler and the chimney is very close. After adding the desulfurization and denitrification system, there is no way to install a water seal valve that occupies a large space between the waste heat boiler and the chimney. Only a flue butterfly valve can be installed 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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