Novel bidirectional pressure protection valve and method

Abstract

The invention discloses a novel bidirectional pressure protection valve and a method. The novel bidirectional pressure protection valve comprises a valve body; an inner pressing opening is formed in the top of the valve body; the inner pressing opening is internally provided with a bidirectional pressure protection device; the bidirectional pressure protection device comprises a first limiting ring; a first piston is arranged at the bottom of the inner pressing opening; a second limiting ring is arranged at the bottom of the first piston; the first and second limiting rings are fixedly connected with the inner wall of the inner pressing opening; and the first piston is in sliding connection with the inner pressing opening. Through arrangement of the bidirectional pressure protection device, when pressure in a solid energy saving furnace is higher than the set value, the pressure in the solid energy saving furnace pushes the second piston to move, smoke enters the second piston throughan air inlet, and is exhausted through an air outlet. When negative pressure is generated by the solid energy saving furnace, less pressure is required by an outer pressing opening to push the first piston to move. The novel bidirectional pressure protection valve can be used in a smoke channel of the solid energy saving furnace, and can be used in a thermal insulation tank body which loses heat when being opened and can not bear negative pressure.

Description

technical field [0001] The invention relates to the technical field of protection valves, in particular to a novel bidirectional pressure protection valve and method. Background technique [0002] With the requirements of environmental protection and the promotion of coal-to-electricity heating in the north, solid energy storage furnaces are more and more used in heating in the north and peak shaving in power plants. The flue of the traditional solid energy storage furnace adopts an open design, and the pressure inside the furnace is basically equal to the pressure outside the furnace. The disadvantage of this is that due to the open system, high-temperature flue gas will inevitably be discharged or leak out of the flue in the furnace, resulting in heat loss. Reduce the insulation effect of accumulator furnace. Conventional pressure protection equipment operates when the pressure in the furnace is higher than the set value, and exhausts the flue gas. When the flue in the re...

AI Technical Summary

Problems solved by technology

The flue of the traditional solid energy storage furnace adopts an open design, and the pressure inside the furnace is basically equal to the pressure outside the furnace. The disadvantage of this is that due to the open system, high-temperature flue gas will inevitably be discharged or leak out of the flue in the furnace, resulting in heat loss. Reduce the thermal insulation effect of accumulator furnace

Conventional pressure protection equipment operates when the pressure in the furnace is higher than the set value, and exhausts the flue gas. When the flue in the regenerative furnace is under negative pressure, it cannot absorb the outside air in time and eliminate the negative pressure in time, because the energy storage furnace is resistant to negative pressure. The pressure capacity is very poor, and a small negative pressure will cause equipment damage. For this reason, the regenerative furnace does not use a selective pressure safety valve, but chooses an open design that is not sealed in some parts

[0003] The flue of the traditional solid energy storage furnace adopts an open design, and the pressure inside the furnace is basically equal to the pressure outside the furnace. The disadvantage of this is that due to the open system, high-temperature flue gas will inevitably be discharged or leak out of the flue in the furnace, resulting in heat loss. Reduce the thermal insulation effect of accumulator furnace

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