Pulverized coal flow adjusting valve

Abstract

The invention belongs to the field of dry pulverized coal gasification and particularly relates to an adjusting valve used for adjusting the flow magnitude of airborne pulverized coal. The flow adjusting valve comprises a valve body. The valve body is provided with a fluid flowing inlet and a fluid flowing outlet. A valve core used for adjusting the flow of fluid is arranged in the valve body. A retainer ring used for preventing sundries from entering a valve deck through a gap between the valve body and the valve core is arranged in the gap between the valve body and the valve core and is connected with a valve body lining. In addition, the retainer ring is arranged on the outer side of the valve core in a sleeving mode and is in sliding fit with the valve core. The damage to a corrugated pipe valve rod due to the fact that foreign matter enters the valve deck through the gap between the valve body and the valve core is effectively prevented through the retainer ring, and the retainer ring further plays a guiding effect on the movement of the valve core while the foreign matter is blocked. Besides, due to tooth-shaped holes of the board face of the retainer ring, airflow guided in through a sweeping hole formed in the valve deck can evenly enter the downstream of the valve body through the tooth-shaped holes, and the sweeping airflow can conveniently sweep and clean the pulverized coal of the corrugated pipe valve rod and the sundries on the retainer ring.

Description

Technical field [0001] The invention belongs to the field of dry pulverized coal gasification, and in particular relates to a regulating valve for regulating the flow rate of airborne pulverized coal. Background technique [0002] In the dry pulverized coal gasification process, the flow of pulverized coal entering the gasifier needs to be controlled by a regulating valve. The regulating valve includes a valve body. The upper end of the valve body is a fluid inlet, and the lower end is driven by a drive device to drive the valve stem to drive the valve core to move up and down in the valve body. The side wall of the valve body is provided with a fluid outlet. The valve core of the valve body is a barrel. Shaped and the barrel mouth faces the fluid inlet, the barrel wall of the valve core is provided with a U-shaped throttling channel that penetrates the barrel wall on one side of the valve core. The pulverized coal airflow enters the valve body from the fluid inlet, and then ente...

AI Technical Summary

Problems solved by technology

Due to various reasons of on-site operation and process, the medium flowing through the valve often contains foreign objects such as iron wires, welding rods, and hard lumps. The gap between the cores enters the bonnet and damages the bellows stem, which shortens the service life of the regulating valve and increases the maintenance cost of the equipment

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