DD261063A3 - ARRANGEMENT FOR REDUCING EXPLOSIVE PRINTS IN CLOSED SPACES - Google Patents

Abstract

The invention, an arrangement for reducing explosive pressures in enclosed spaces, is useful in dealing with or possible generation of explosive gas or vapor / air mixtures in enclosed spaces such as containers and housings. The object of the invention is to reduce the high material and manufacturing costs for a safety requirements sufficient execution and design of the enclosed spaces. The solution according to the invention consists in the arrangement of an incombustible porosic mass in the explosion-hazarded cavity. In the case of an explosion, the leading pressure wave penetrates into this mass and the combustion speed of the explosive mixture that has penetrated is reduced to such an extent that a substantially lower pressure peak is produced. Areas of use for the invention are enclosed spaces in which explosive gaseous or vaporous mixtures can explode, preferably in the chemical industry.

Description

For this 2 pages drawings

Field of application of the invention

The invention relates to an arrangement for reducing explosion pressures in enclosed spaces such as containers or similar, at least approximately completed technical structures in which explosions may occur, such as housing of the protection type flameproof enclosure.

Characteristic of the known technical solutions

There are arrangements for reducing explosion pressures are known in which predetermined breaking points such as bursting, cover, etc. are provided in order to achieve a pressure relief. However, these means, as well as specially designed safety valves, require constant maintenance and care in order to ensure their operational readiness in the event of an emergency. Smaller rooms are therefore designed so that they can absorb the maximum expected explosion pressure with certainty.

Object of the invention

The invention has the aim of finding an arrangement which makes it possible to reduce the explosion pressure in order to substantially reduce the significant expenditure on equipment for a pressure relief or pressure-resistant design.

Explanation of the essence of the invention

The invention has the object to find a means that significantly reduces the maximum explosion pressure in closed systems and requires less material.

According to the invention the object is achieved in that in the closed space, a material is arranged, which absorbs the explosive mixture in which one of the explosion preceding pressure wave correspondingly higher, in itself.

In this material, the explosive mixture burns with a much lower pressure increase over time or remains unburned.

This leads in the total volume of the housing to lower pressure increase in time and lower explosion pressure. For the material which must be incombustible, metal, glass, ceramics, etc. are suitable with open through pores or gaps whose dimensions are below the marginal gaps of the corresponding gas or vapor / air mixtures.

The best effect is achieved with a free arrangement in the room.

embodiment

The invention will be explained in more detail below using an exemplary embodiment. In the accompanying drawing shows

1: a pressure-tight encapsulated lamp in principle,

FIG. 2: a container in principle,

Figure 3: a container with a pipe socket in principle and

Figure 4: a diagram.

1 shows schematically the structure of a pressure-tight encapsulated lamp. In the housing 1, a carrier 2 is arranged on which the free accessibility is limited only slightly limiting slag wool 3 is attached. Also connected to the carrier 2 is a fluorescent lamp 4, the installation of which may be an ignition source for the explosive gas mixture that has entered the room. In the explosion of ethylene / air mixtures, when the room is filled with slag wool about 33%, the explosion pressure drops by about 90%.

In the figure 2, a container 5 is shown without internals. A package of glass wool 6 is freely accessible on all sides.

The ratio of the volume of the glass wool package 6 to the volume of the container 5 and the resulting pressure drop in the event of an explosion is shown in the curve a in the diagram in FIG.

A container 7 with an attached pipe socket 8 is shown in FIG 3. The explosion penetrates through the pipe socket 8 in the container 7, in which also a glass wool package 6 is attached freely accessible.

The pressure reduction of the explosion at a corresponding volume fraction of the glass wool package shows the curve b in the diagram in Figure 4.

Claims (4)

1. An arrangement for reducing explosion pressures in enclosed spaces, characterized in that in the closed space such as housing (1) or container (5,7), in which gas or vapor / air mixtures can explode an incombustible material with open through Pores or columns is arranged largely freely accessible. 2. Arrangement according to item 1, characterized in that the dimension of the pores or gaps is below the respective Grenzspaltweiten for the explosive mixtures. 3. Arrangement according to item 2, characterized in that the material consists of slag wool (3), glass wool (6), metal or similar materials. 4. Arrangement according to item 1-3, characterized in that preferably to 30% of the space is filled with the material.