Valve core structure of a pulverized coal flow regulating valve

Abstract

The invention belongs to the field of dry coal dust gasification, and particularly relates to a valve element structure of a gas carrying pulverized coal flow adjusting valve. A valve element is of a barrel-shaped structure, and a throttling channel penetrating the barrel wall on one side of the valve element is formed in the barrel wall of the valve element; the width of the throttling channel is gradually increased in the direction from the barrel bottom to a barrel opening; and the throttling channel is composed of a trapezoidal notch, formed in the barrel opening, of the valve element, the lower bottom edge of the trapezoidal notch is located on the barrel edge, the upper bottom edge of the trapezoidal notch is in an arc shape, and the arc curvature center is located in the throttling channel. Compared with a traditional U-shaped groove, the throttling channel of the structure is higher in flow capacity, flow resistance of pulverized coal media is effectively reduced, the pulverized coal is not likely to generate blockage in a valve body, and the machining depth of the throttling channel is smaller than that of the traditional U-shaped groove; and on the contrary, machining is easy, and the cost is low; and the valve structure is more compact. The valve element is of a detachable structure, and when the valve element is damaged, only the throttling channel component needs to be replaced generally; and the structure is convenient to maintain and replace, and a large amount of cost can be saved.

Description

technical field [0001] The invention belongs to the field of dry coal powder gasification, and in particular relates to a valve core structure in an air-borne coal powder flow regulating valve. Background technique [0002] In dry pulverized coal pressurized gasification process, the flow rate 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, the lower end is driven by a driving device to drive the valve stem to drive the valve core to move up and down in the valve body, and the side wall of the valve body is provided with a fluid outlet. The barrel mouth is facing the fluid inlet. The barrel wall of the spool is provided with a U-shaped throttling channel that runs through the barrel wall on one side of the spool. The pulverized coal airflow enters the valve body from the fluid inlet, and then enters the barrel-shaped spool and It passes throug...

AI Technical Summary

Problems solved by technology

In the actual industrial application process, when the valve core is used for flow adjustment, the orifice is easily damaged, and once damaged, it must be replaced

Since the valve core is made of wear-resistant cermet material, the material and processing costs are relatively high, which greatly increases the maintenance cost of the equipment for coal chemical enterprises

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