Mute type pressure regulating valve set

Abstract

The invention provides a mute type pressure regulating valve set used for the dry dust system of the blast furnace in iron smelting process, which includes a support, a valve body arranged on the support, wherein a baffle is fixed in the valve body, at least overflowing sleeves are evenly arranged along the periphery of the baffle, a blast cone is flexibly arranged along the up-down direction in each of the overflowing sleeves, an inter-contacting sealing surface is arranged between the overflowing sleeve and the blast cone, each blast cone is connected with a driving mechanism. The inventionrealizes the voltage regulation purpose by changing the circulation area of the air flow by the blast cone which moves up and down. The flow direction is unchanged during the movement of the blast cone, so the surge flow or turbulence are effectively prevented, and thus the noise source is completely avoided and the purpose of reducing the noise is realized. At the same time, no denoising device is needed during the actual use because the noise of the valve body is low, the investment cost can be reduced by 70 percent, the occupation area can be reduced by 90 percent and the social and economic benefits are very distinct.

Description

technical field [0001] The invention relates to a pressure regulating valve group, in particular to a silent type pressure regulating valve group used in the dry dust removal system of the blast furnace ironmaking process. Background technique [0002] The pressure regulating valve group is an indispensable device for blast furnace ironmaking. It is necessary to control the pressure on the top of the blast furnace to maintain stability and ensure that the net gas main pipe pressure is at the set value in order to ensure the normal operation of ironmaking production. With the domestic ironmaking dust removal technology changing from wet dust removal to dry dust removal, the noise of the pressure regulating valve group has become a major public nuisance. After measurement, the noise on the outlet side of the pressure regulating valve group has reached about 125 decibels, which greatly exceeds the national environmental protection standard. Department-mandated design specificat...

AI Technical Summary

Problems solved by technology

When the gas flow passes through the valve plate 2, the flow direction of the original gas flow must be forcibly changed, so that the gas flow passing through the butterfly valve will form a turbulent flow, resulting in strong noise

Therefore, using the traditional butterfly valve as a pressure regulating device, strong noise is unavoidable

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