SU1257229A2 - Device for production of inert foam - Google Patents

Description

The invention relates to mining industry, can be used to extinguish underground fires with inert foam and is an improvement of the invention according to the authors. St. No. 1099089.

The purpose of the invention is to increase the productivity of the device and the quality of the generated foam by using the heat of the foaming liquid to evaporate liquid nitrogen,

Fig. 1 is a schematic diagram of the proposed device for producing an inert foam; figure 2 - section aa in figure 1.

The device consists of a line 1 for supplying liquid nitrogen, a pipe 2 with a valve 3 for supplying liquid nitrogen to an evaporation chamber 4, a pipe 5 with a valve 6 for supplying liquid nitrogen to a coil 7 having inlet 8 and outlet 9 channels, a pipe 10 for introducing nitrogen gas through the disperser 11 into the foaming liquid of the generator 12 of inert foam. Between the non-steam chamber 4 and the inert foam generator 12 there is a heat exchange channel 13 for supplying heat transfer fluid.

The device works as follows.

When the foaming liquid is supplied to the inert foam generator 12, liquid nitrogen is fed through the nozzle 2 with the valve 3 to the evaporation chamber 4. At the same time, a heat transfer fluid is passed through the heat exchange channel 13, which evaporates the liquid nitrogen in the evaporation chamber 4 and heats the foaming liquid in the generator 12 inert foam. When valve 6 is opened, liquid nitrogen through pipe 5 and inlet channel 8 enters the coil 7. Cooling foaming liquid, liquid nitrogen evaporates in the coil and through channel 9 enters the evaporation chamber 4, from where gaseous nitrogen is pumped through pipe 10 and sprayer 11 an inert foam generator, where mixed with the foaming solution, forms an inert foam. The multiplicity and durability of the generated foam is controlled by means of a valve 6, which makes it possible to vary the amount of nitrogen evaporating and the temperature of the foaming liquid.

Editor S. Lisin

Compiled by V. Baranov

Tehred I.Popovich Proofreader M.Sharoshi Order 4892/27 Tiraz: 436Subscription

VNIIPI USSR State Committee

for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab, 4/5

Production and printing company, Uzhgorod, st. Project 4

Claims (1)

DEVICE FOR OBTAINING INERT FOAM by ed. St. No. 1099089, ₍ characterized in that, in order to increase the productivity of the device and the quality of the generated foam by using the heat of the foaming liquid to evaporate liquid nitrogen, the device is equipped with a coil with inlet and outlet channels installed inside the inert foam generator around the nitrogen gas atomizer, the inlet channel of the coil is connected to the line, the supply of liquid nitrogen, and the outlet with the evaporation chamber. d <rig.1 SU, _n , 1257229 A 2 “And ί