Dust-depression plant

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.

1 dwg

 

The invention relates primarily to mining and can be used to suppress dust generated during the crushing and grinding of the rock mass at the enterprises of mining and metallurgy, coal, construction and other industries.

The dust control on stone crushing plants is carried out by conducting a series of organizational and technical measures. One of the technical measures is irrigation. The effectiveness of dust control irrigation increases with the use of ionic liquid, for example water, because the dust particles are electrically charged (Goncharov S.A. and other Assessment electrostatic charging of dust particles generated during the extraction of iron ore. Mining journal, 2002, No. 7, s).

Known devices for dust suppression used in the mining industry, the principle of which is based on the irrigation of processed rock mass in receiving and handling hoppers, conveyor and crusher (Open pit mining. The Handbook. M., "Mining Bureau, 1994, s).

The disadvantages of these devices are high consumption of water required for irrigation, and low efficiency of dust suppression.

Closest to the claimed install analog is a device for dust suppression (A.S. USSR №651140), the principle of de is the policy which is based on irrigation ionized water, the resulting collision of the ionized air flow with water at the outlet of the jet from the nozzle.

However, this device is widely used in the enterprises of the mining industry has not found. The main reason is the complexity of the technical implementation to achieve sufficient efficiency.

To improve the efficiency of dust suppression features setup that implements the method of dust suppression, confirmed by the Decision of Rospatent, FIPS from 9.03.2005, for a patent for invention №2002133901/03.

This goal is achieved by introducing into the composition an extra capacity of fluid to the opposite polarity.

The structural scheme of the installation for dust suppression shown in the drawing. The installation includes a control unit 1, a source of high pressure air 2, the capacity of the siphon type with ionized water 3, the thin nozzle spray 4, electromagnetic, pneumatic 5 and 6 hydraulic valves, the inlet 7 and 11 purge lines, water line 8, 12, device isolation air and water routes 9, the control circuit and control 10.

The main task of this unit is increasing the efficiency of dust suppression at the expense of alternate irrigation bunkers, conveyors and crushers mist with a droplet size of less than 50 m is m, positively and negatively charged water. A thin spray of water is achieved through the use of nozzles of a special construction (Modular fire extinguishing. Advertising ZAO NPP "East", Saint-Petersburg., 1999), as well as tanks siphon type with ionized water 3, which are used to create pressure in the system, necessary for normal functioning of the injectors 4. Squeezing ionized water from tank 3 is carried out by the air supplied through the passage 7 from the source of high pressure air 2.

The task of the modes and the operation of the installation is carried out from the control unit 1 with solenoid pneumatic 5 and 6 hydraulic valves and control circuits and control 10. Irrigation is carried out cyclically, thus to reduce the number of pipelines of different irrigating fluid serves alternately on the same supply line 12. The cycle of operation includes:

the irrigation water is of positive polarity;

- purge supply lines air;

- irrigation water negative polarity;

- purge supply lines air.

Purge the supply line is made for the purpose of squeezing her water residues of one polarity, before applying water the other polarity, and then, to avoid replacing the injunction of water in the supply pipe when working in the cold season.

The proposed solution was tested in field conditions. When this dust taken from stone crushing production vothonas in the air with an explosive charge, and then deposited by different irrigation finely dispersed water from plants of the siphon type. Due to the lack of a source of high pressure air, squeezing the water from the tanks was carried out using powder gases.

Field tests of a prototype installation of dust suppression confirmed the correctness of the proposed technical solutions.

Installation for dust suppression, consisting of control unit, a source of high pressure, the capacity of the siphon type with ionized water, injectors fine spray, electromagnetic, pneumatic and hydraulic valves, air and water lines, circuits and control, characterized in that its composition also includes a container of water opposite polarity.



 

Same patents:

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.

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FIELD: mining, particularly methods and devices to prevent dust generation in tailing pit benches by moistening thereof with water or liquid binding agent.

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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.

1 dwg

FIELD: mining.

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.

FIELD: mechanics.

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.

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FIELD: mining.

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EFFECT: higher efficiency of dust suppression, manoeuvrability of plants.

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FIELD: mining.

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EFFECT: higher efficiency of development of gas-bearing coal beds.

4 dwg

FIELD: mining.

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EFFECT: improving the prevention efficiency of coal self-ignition in mines.

FIELD: mining.

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.

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