Pressure generator inert foam
(57) Abstract:Usage: in the mining industry for extinguishing underground fires in isolated spaces mines. The purpose of the invention is improving the performance of generating inert foam due to the intensification of the process. The invention is: to obtain inert foam generator high performance integrated gasifier liquid nitrogen, is made in the form of a casing pipe of the fluid (gas and liquid phases of the mixture components) that are placed in the depressions on the outer side of the pipe. There atomizing chamber liquid nitrogen with a built-in package for input streams of liquid nitrogen in the gasification chamber and the foam generating net made in the transport laying on the external contour of the body of the foam generator with the possibility of longitudinal displacement and fixing in position with the formation of the mixing chamber in the form of a cone. 5 Il. The invention relates to the mining industry and can be used when extinguishing underground fires in isolated spaces mines.Known foam generating apparatus for extinguishing fire for debris, comprising a cylindrical casing, atomizer, phenogenetic projectile is insufficient capacity to fill large amounts of isolated space mining.Known foam for extinguishing fires in mines, comprising a cylindrical casing, a pipeline rascalities, folding spray chamber, consisting of the guides of the feathers with water-repellent cloth, package nets, fence slotted sockets.However, in this generator while increasing productivity by generating foam required ejection of the ambient air, which increases the oxygen content in the inert foam.The purpose of the invention is improved performance when generating inert foam.This is achieved in that in the pressure generator comprising a casing, pipes with nozzles, folding camera, made in the form of the cone and foam generating the grid, the generator housing made in the form of cassettes pipes with lead pipes, consisting of a Central tube with spray nozzles for liquid nitrogen, the outer surface of which is made with longitudinal ribs, and pipes with a distributing reservoir for the supply of mixture components for the generation of foam placed between the ribs of the Central pipe and foam generating net made of interconnected Central and lateral parts and installed at the warehouse of the formers.The proposed set of distinctive features due to the additional module gasification nitrogen, embedded in the foam generator, can improve the performance of generating foam, with an additional effect tubular longitudinally-ribbed profile of the shell gasification chamber evaporator having at the input the package nozzles for concocting spraying liquid nitrogen.In Fig. 1 and 2 presents the proposed generator of Fig. 3 is a longitudinal section; Fig. 4 - section a-a in Fig. 3 ; Fig. 5 is a flow chart of application of the foam generator.Pressure generator inert foam includes a tubular housing 1, the foldable cone 2, attached in position on the annular support 3 by means of the spring strips 4 and clamps 5 and foam generating net 6 (Central part of which is made rigid) forming inside the mixing chamber 7. In transport position the diffuser 2 folded additionally secured on the support ring 8.Tubular generator housing has a Central tube 9 longitudinally-ribbed profile with the spray nozzles 10 liquid nitrogen, the camera 11 of evaporation, the nozzle 12 and the inlet pipe 13. In vPad respectively for feeding the components of the mixture to generate foam - foaming solution and compressed inert gas.Technological scheme for describing application generator inert foam includes a reservoir 20 of liquid nitrogen, evaporative unit 21, the pipes 22, 23 and 24, respectively, for supplying foaming solution of liquid and gaseous nitrogen, an isolation jumper with 25 proemnyh pipe 26, connecting the mounting ring adapter 27 and stretching 28.Pressure generator inert foam works as follows.In case of fire in an isolated space mining generator in transport (folded) form is transported to the insulating construction of the emergency site, with stretch marks 28 may be used as shoulder straps. At the bridge the generator is mounted in operating position, which clamps 5 and additional laying release and fix the diffuser 2 on the annular support 3. Then open proemnyh the pipe 26 through the auxiliary mounting ring adapter 27 and the ring support 8 generator is fixed at its flange.To generate foam to the respective nozzles of the generator is connected pipes 22, 23 and 24.The need to feed generatevaluelist gas, i.e. the need surround fire inert foam above parameters on gasification of nitrogen on the evaporator unit 21, which reduces the reliability and safety of rescue work. In this case, the coolant, it is possible to use a solution of foaming, the preparation of which depends on the volume of fire (length and cross-section of excavation, the volume of the isolated space, and others ).In the operating mode of the generator liquid nitrogen through the spray nozzle 10 mist jets injected into the evaporation chamber 11, where he is due to heat conduction in the pipe wall 9 longitudinally-ribbed profile removes heat flows foaming solution and compressed gas supplied through the tapes tubes 14 and 15.Mixing of the components occurs in the mixing chamber 7 and through the foam generating grid 6 obtaining inert foam on the side of an isolated space. The estimated modulation generator foam reached by increasing the temperature of the medium and mode of supply of liquid nitrogen.The proposed solution allows to have a reliable operative means of fighting fires in the mountain vyrabotkami case, pipes with nozzles, folding camera, made in the form of the cone and foam generating the grid, characterized in that, to improve the performance of generating foam generator housing made in the form of cassettes pipes with lead pipes, consisting of a Central tube with spray nozzles for liquid nitrogen, the outer surface of which is made with longitudinal ribs, and pipes with a distributing reservoir for the supply of mixture components for the generation of foam placed between the ribs of the Central tube, and foam generating net made of interconnected Central and lateral parts and installed on the folding camera with education diffuser chamber for mixing liquid nitrogen and foam solution.
FIELD: mining, particularly methods and devices to prevent dust generation in tailing pit benches by moistening thereof with water or liquid binding agent.
SUBSTANCE: device comprises self-moving vehicle, for instance pontoon water craft, provided with pump, vessel for reagent, hydraulic monitor, unit with executive tool for channel forming in bank area and isolated power generating plant. Above mechanisms are installed on water craft deck. Hydraulic monitor may rotate in horizontal and vertical planes. Drives of all mechanisms are linked with the power generating plant. Executive tool is installed below water craft floating line. Vessel for reagent is provided with proportioning device. Dust control method involves initially installing the water craft on tailing pit water surface; directing the water craft towards bank to area to be sprayed, in which working tool forms channel for water craft movement; pumping water from tailing pit into hydraulic monitor; adding reagent from vessel to water with the use of proportioning device and spraying the obtained liquid over dust-forming area. Water from tailing pit is used for above spraying operation and for water craft movement.
EFFECT: increased dust control efficiency.
2 cl, 2 dwg
FIELD: mining industry, particularly means or methods for preventing, binding, depositing, or removing dust and preventing explosions or fires.
SUBSTANCE: method involves treating dust-and-gas cloud with finely-dispersed ionized liquid, for instance with water, with the use of sprinkling plants alternately arranged so that ions of liquid spays generated by plants have opposite charges. The sprinkling plants are located outside zone of possible plant damage or are protected against explosion action. Sequence of plant alternation, ionicity, liquid quantity and liquid spraying pattern are determined from tests and calculations based on particular pit or underground mine blasting conditions.
EFFECT: reduced time of particle coagulation on liquid droplets and time of particle precipitation, possibility to reduce dust cloud propagation.
2 cl, 2 dwg
FIELD: mining industry, particularly to catch dust generated by machines and/or rigs in mines and tunnels.
SUBSTANCE: dust catcher comprises body with precipitation member formed as demister comprising moistening nozzles and drip catching means. Fan with drive is arranged near inlet/outlet side thereof. Moistening nozzles located in front of the demister in air flow direction are made as spaced multijet nozzles having separate sprayers, which form common sprayed curtain. The fan is installed in cleaned gas flow downstream the demister and drip catching means. The fan is arranged in case connected to dust catcher body. Demister is installed in contaminated air flow at inlet side and is arranged in inclined position. Upper edge thereof projects relatively lower edge. Air deflectors are arranged between the demister and drip catching means. Bottom sheet is inclined towards drip catching means. Multijet nozzles project towards contaminated air flow and are connected to load-bearing frame obliquely installed in accordance with demister inclination angle. Dust catcher is provided with separate vessels for additives, which pass through metering device into water-pipe. Mixer connected to water-pipe or built in water-pipe is installed downstream the metering device. Spraying device is arranged in front of moistening nozzles and demister with drip catching means. Spraying device comprises spraying heads, which create water mist and is connected with water source or with water-pipe and metering device with mixer. Dust-contaminated air flow is mixed with water mist and then the obtained sludge is gathered. Moist air is dried by water droplet separation and then the dried air is introduced in cleaned gas flow. Gases generated as a result of explosion are laden with water mist preliminarily mixed with additives, which create ecologically safe compositions with nitrose or similar gases formed during explosion.
EFFECT: increased operational efficiency and reduced dust catcher size.
20 cl, 8 dwg
FIELD: mining, particularly to depress dust generated during rock milling in enterprises of mining and smelting, coal, construction industries.
SUBSTANCE: plant comprises control unit, high-pressure source, siphon-type vessels filled with ionized water having opposite polarities, spraying jets, which generate fine spray, electromagnetically driven pneumatic and hydraulic valves, pressurizing and purging air channels, water pipelines, coupling members for air and water pipelines and control circuits.
EFFECT: increased dust depression efficiency.
SUBSTANCE: invention is related to the field of mining, in particular, to safety issues in coal mines, namely to explosions of methane caused by friction spark created as a result of mine machines picks friction against hard rocks. Method is suggested to assess danger of rocks regarding friction inflammation of air-methane mixture, which consists in the fact that rock samples are taken, their strength and content of silicon dioxide are determined, and then tests are carried out at test bench danger of friction sparking. In order to perform test, explosive mixture is formed in test bench, and nominal cutting speed is increased 1.5 times. If at hardness of rocks f from 3 and content of silicon dioxide up to 30% no inflammations were observed and no friction sparks were produced, then rock is considered safe. If at hardness of rock from 3 to 5 and silicon dioxide content from 30 to 50% with availability of friction sparks with temperature of up to 300°C and absence of inflammations, rock is considered as spark-hazardous of the 1st extent, and if their temperature is more than 300°C - to spark-hazardous of the 2nd extent. If at least one inflammation occurred from friction sparks, rock is considered highly explosive. Use of suggested method makes it possible to increase safety of cleaning and preparatory works.
EFFECT: development of fundamentals for rock classification procedure by danger of friction inflammation in case of their damage with account of their physical-mechanical properties.
SUBSTANCE: device of pressure water supply to irrigation systems arranged on sections of shield mechanised support for underground mines, includes at least one system of plough or combine working element route irrigation in longwall, and at least one system for irrigation of worked space, upper ceiling and/or side mine with central water line for supply of spray nozzles of irrigation systems and switching valves. At the same time all switching valves for irrigation systems are installed in a single irrigation valve box, which is equipped with connection for water line and is arranged on section of shield mechanised support in the form of unit separated from hydraulic valve box.
EFFECT: improved operational safety of device for water supply into irrigation system.
8 cl, 4 dwg
SUBSTANCE: method includes long-term treatment of a dust and gas cloud with water vapour during the blast and afterwards. Vapour is produced by a mobile steam generator by introduction of water in it that has been heated previously up to 65-70°C. The steam generator is installed in the place that is safe from the blast and is directed along with the wind. Besides, prior to blasting, atmosphere above the blasting area undergoes treatment.
EFFECT: higher efficiency of dust suppression, manoeuvrability of plants.
SUBSTANCE: previously laboratory analysis is carried out on coal from a bed and its packs to detect availability of elements and substances in them that may create compounds with water; natural cracking is detected, as well as cleat in the coal bed; wells are drilled from a bottomhole by coal, with length more than by 1 m of the mine skirting cycle; water is injected into the bed with continuous measurements of the methane, water pressure, injection time; the mine is tunnelled for the value of the hydrated bed with the speed that does not exceed methane release within permissible norms; in the area of bed hydration blast holes are drilled in the sides of the mine at each cycle to detect the hydration area. During arrangement of the mine, parameters are varied, which are related to injection of water into bed, maximum reduction of the released methane, optimising arrangement of the mine.
EFFECT: higher efficiency of development of gas-bearing coal beds.
SUBSTANCE: method involves supply of frozen fluid obtained by mixing with liquid gas to the worked-out space. In addition, distribution of coal dust supplied to the worked-out space is determined as to particle fractions. Distribution of the obtained frozen fluid particles as to fractions is equal to distribution of coal dust as to particle fractions.
EFFECT: improving the prevention efficiency of coal self-ignition in mines.
SUBSTANCE: method includes spraying a liquid in a flow of air arriving to a mined space. At the same time liquid spraying is alternated with supply of dry gas into coal deposits. Moisture content in gas discharged from the coal deposit is measured. Gas supply is replaced with liquid spraying in case moisture content stops dropping in gas discharged from coal deposit.
EFFECT: improved safety of mining works.