A pulse blowback valve

Abstract

The invention belongs to the field of dust removal and particularly relates to an improved pulse back flushing valve for conducting back flushing on a filter element of a filter. The improved pulse back flushing valve comprises a corrugated pipe valve rod assembly. The corrugated pipe valve rod assembly comprises a valve rod and a corrugated pipe, wherein the valve rod is sleeved with the corrugated pipe in a spaced manner. The corrugated pipe comprises multiple corrugated pipe sections which are sequentially connected in the axial direction of the valve rod. Every two adjacent corrugated pipe sections are connected through a correction ring with which the valve rod is sleeved. A damping disc spring or a rubber pad is arranged on the mortise joint face of the valve rod and a valve flap. By the adoption of the structure, the overall rigidity of the corrugated pipe can be effectively improved, and the problem that the corrugated pipe losses stability in the reciprocating motion process of the valve rod and rubs with the valve rod is solved. By the adoption of the improved pulse back flushing valve, the structure of an inner runner of the valve can be remarkably simplified, the flow resistance loss is reduced, the effect of the back flushing process is improved, machining and assembling accuracy is improved, and production cost is reduced. Vibration impact of the pulse back flushing valve under the high-frequency high-speed switching working condition can be remarkably reduced through a corresponding damping component.

Description

technical field [0001] The invention belongs to the field of dust removal, and in particular relates to a pulse backflushing valve for backflushing cleaning of filter cores. Background technique [0002] In the dry pulverized coal gasification process, the syngas needs to be dry-ashed through a high-temperature and high-pressure ceramic filter. In order to realize the backflushing cleaning of the filter element, it is necessary to provide a valve that can switch frequently and quickly and generate pulsed air flow under the condition of high temperature and high pressure gas. The existing pulse blowback valve generally includes a driving mechanism, a bellows valve stem, and a valve body, wherein one end of the valve body is connected to the valve cover, the other end of the valve body is connected to the valve seat, one end of the bellows valve stem is connected to the driving mechanism, and the other end of the bellows valve stem is connected to the valve body. One end is c...

AI Technical Summary

Problems solved by technology

However, in the existing process, the processing and assembly precision of the valve is high, the production cost is high, the vibration of the valve is large during the working process, and the internal flow channel structure is complex, and the flow resistance loss is large, which affects the improvement of the effect of the backflushing cleaning process.

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