Method for neutralisation and utilisation of rubble and/or asbestos ballast siftings

FIELD: ecology.

SUBSTANCE: : invention relates to environment protection, in particular to purification of rubble and/or asbestos rail ballast from pollution with oil and can be used on rail transport. Siftings of rubble and/or asbestos rail ballast are loaded into device for washing. Washing of ballast siftings is carried out by mechanical mixing with detergent solution. After washing ballast siftings and polluted detergent solution are removed together and separated. During separation ballast siftings are separated into fractions and removed in order to be used in proper way. Separated polluted detergent solution is supplied through nozzles into precipitation tank of centrifugal type for pollution by separating phases. From precipitation tank separated oil products, detergent and sludge are removed in separate flows. Sludge is dehydrated and after that neutralised using chemical reagents. Detergent solution is subjected to purification from heavy metal salts and residual oil products. Formed deposit of heavy metal salts is periodically removed to the stage of sludge neutralisation. Purified detergent solution is supplied again to the stage of mechanical washing of ballast siftings. Before supplying detergent solution to the stage of washing, technical detergent which does not require water heating is introduced into it.

EFFECT: high degree of ballast siftings purification is achieved with simultaneous efficient phase separation, reduction of dangerous wastes formation and energy consumption for the process.

2 cl, 2 dwg

 

The invention relates to the protection of the environment, in particular to the cleaning of the screening of crushed stone and/or asbestos ballast of railway tracks from oil pollution, heavy metals, and can be used in rail transport and in all industries, which are used, transported or stored crude oil and petroleum products.

As a result of spills during emergency situations, leaks from tanks during filling, transportation and sludge due to the malfunction of boilers and discharge devices tanks contaminate crushed stone and asbestos ballast of railway tracks.

A known way of cleaning the gravel track through the installation screens to separate the debris transported by the belt conveyor, and with the help of water. When it cleared after double cleaning mechanically and water jets crushed again contribute on track, purify contaminated water in the pits, and the precipitated mud is applied on the garbage for their joint transportation belt conveyor in cumulative carriage (see EN, NO. 2249643, EV 27/06, 2005).

This method is ineffective for treatment of crushed stone and asbestos screening ballast of railway tracks from oil spills due to the fact that a large number of oil spills and small is racchi remain associated with the processed material, and also produce large amounts of waste III hazard class.

The closest technical solution is the best way to clean the base material of the road surface from oil and petroleum products (see EN, NO. 2219304, IN 15/00, 2003).

Known cleaning method of the substrate material of the road surface from oil and oil products includes pre-cleaning contaminated material from garbage with windage, collection of contaminated material by suction air, loading it into the wash tank, washing with wash solution containing a surfactant, while the compressed air in counterflow downloadable material, and a part of the compressed air fed into the upper part of the washing vessel along the surface of the liquid; a discharge from the flush tank washed material with the use of his appointment and submission of oily emulsions and soiled cleaning solution from the wash tank in multiple installation for their subsequent purification by phase separation and oily emulsion before cleaning filter; delete from multiple installations of selected petroleum products, purified cleansing solution with re-using it for washing and slurry, which is then subjected to an additional phase separation followed what UPRAVLENIE selected liquid phase in the installation of re-cleaning.

The disadvantages of this method of cleaning the substrate material of the road surface from oil and oil products are limiting the size of the fraction leached material (no more than 3-5 mm), low efficiency of cleaning of the base material of the road surface from oil products by means of ozonation suspension in the wash chamber, the inability to remove salts of heavy metals, the need for heating the cleaning solution to a temperature of 40-55C and the associated fuel consumption.

Object of the invention is the creation of new environmentally friendly method for the disposal and recycling of crushed stone screenings and/or asbestos ballast.

The present invention is directed to the achievement of the technical result consists in a high degree of purification screening of ballast while making efficient separation of the phases, reducing hazardous waste generation and energy consumption for the process.

This technical result is achieved in a method for the disposal and recycling of crushed stone screenings and/or asbestos ballast, namely, that loads the screening of crushed stone and/or asbestos ballast in a device for washing, rinsing lead by mechanical mixing dropout ballast with detergent solution containing technical detergent, after rinse screening of ballast and contaminated wash the solution away together and share, moreover, the separation of screenings of the ballast scatter fraction with subsequent supply them to use, separated contaminated cleaning solution through the nozzle serves in the sump centrifugal type for cleaning by phase separation away from the sump separate flows of selected petroleum products, cleaning solution and the sludge is dewatered and then neutralized with the use of chemical reagents and wash solution was subjected to purification from heavy metals and residual oil and is recycled to the step of leaching screening of ballast, while the formed precipitate salts of heavy metals periodically assign to the stage of disposal of the sludge.

In the washing solution, purified from the soluble salts of heavy metals, prior to the stage of leaching screening of ballast to compensate for losses impose additional technical cleanser (SCI), which does not require hot water.

The invention is illustrated by drawings.

Figure 1 presents the scheme of the section leaching of crushed stone screenings and/or asbestos ballast, figure 2 - scheme of section cleaning and preparation of the washing solution.

Figure 1 shows: 1 - receiving hopper, 2 - Transporter 3 boot device 4 device for mechanical washing, 5 - pipe for supplying the cleaning solution, 6 - a device for the separation, 7 - transport thera for discharging purified fractions of dropping ballast, 8 - pump, 9 - pipeline for removal of contaminated washing solution containing fractions dropout ballast size of less than 1 mm.

Figure 2 shows: 10 - sump centrifugal type, 11 - nozzle, 12 - the gathering centers, 13 - pipeline to drain surfaced petroleum products, 14 - pump, 15 - pipeline for withdrawal of sludge, 16 - pipeline for feeding the contaminated cleaning solution 17 is a device for the purification of salts of heavy metals and residual oil, 18 - dosing pump for supplying technical detergent 19 - pipeline for draining purified cleansing solution, 20 pipeline for discharge of sludge from the device for cleaning, 21 - a device for dewatering sludge, 22 - pipeline for removal of dewatered sludge, 23 - a device for chemical neutralization sludge, 24 - conveyor for delivery of a chemical reagent, 25 - hopper neutralized sludge, 26 - conveyor for loading neutralized slurry in hopper 27 - pipeline to return wastewater in the sump centrifugal type, 28 - electric panel.

Contaminated screenings of the ballast load grader in a hopper 1, further conveyor 2 is directed through a boot device 3 device 4 for mechanical washing performance 15 m3screening of ballast per hour. In the device 4 for mechanical washing simultaneously with the dropping of ballast under the Ute pipeline 5 purified cleaning solution with 4 volumes of wash solution 1 volume of dropping ballast or 60 m 3in the hour. Mechanical mixing of contaminated dropout ballast with detergent solution provides continuous contact of the washing solution with contaminated by dropping ballast, which increases the degree of its purification and reduces processing time. In addition, the mechanical mixing provides a high degree of washing without additional heating of the cleaning solution before applying it on stage leaching, resulting in lower energy costs to the process.

The suspension obtained from screening of ballast and soiled cleaning solution from the device 4 for mechanical washing is extruded in the device 6 for separation, where separation occurs at the screening of ballast into fractions, and the contaminated cleaning solution containing petroleum products and the fraction of dropouts ballast less than 1 mm, is fed into the section cleaning and preparation of the washing solution. Thus by separating the coarse fraction the ratio of the volume of the washing solution to the volume screening of ballast increases and is 12/1. Salts of heavy metals are transferred into the cleaning solution, and petroleum products adsorbed on the surface of the microparticles.

Purified fractions dropout ballast 40 - 20 mm, 20 mm - 5 mm, 5 - 1 mm conveyors 7 are sent to the site of accumulation. From the sites of accumulation of the purified fraction is then shipped to the consumer.

Contaminated cleaning solution containing nafter the products and the fraction of dropouts ballast less than 1 mm, the pump 8 is pumped through the pipeline 9 and fed through the nozzle 11 of the tank 10 centrifugal type section of cleaning and preparation of washing solution (figure 2). In the sump 10 is a bundle of soiled cleaning solution from the pop-up petroleum contaminated cleaning solution and sludge. The volume of the sump centrifugal type is 120 m3. Due to being created in the sump system nozzle rotation of contaminated cleaning solution efficiency stratification it is increased by 4 times compared to conventional clarifiers. In the upper part of the tank 10 in the form of a film accumulate oil in the middle part - contaminated cleaning solution, near the bottom sludge.

Oil film going floating gathering centers 12 and removed through the pipe 13 in the capacity of sub-standard oil (not shown), further they are sent to a specialized company for recycling. Selected petroleum products can be used as an additive for boiler fuel.

The sludge accumulating and the signal of the capacitive sensor installed near the bottom of the tank 10, is pushed by the liquid column and the pipe 15 is fed into the device 21 for sludge dewatering. The rate of formation of sludge equal to about 5 m3/hour. The residual concentration of oil in the sludge after the stage of leaching solution is m TMS is not more than 1%. The residual concentration of salts of heavy metals is higher than the maximum permissible concentration.

The washing solution from the middle of the tank 10 by pump 14 through pipe 16 serves in the device 17 for removing heavy metals and residual oil. After each cleaning cycle dropout ballast up to 10-15% TMS adsorbed particles on the mechanical and withdrawn from the process, so by the dosing pump 18 in the purified solution was added TMS. Purified cleaning solution drains the pipeline 19 and sent through the pipeline 5 in the device 4 for machine washing (see figure 1).

Dewatered sludge after the device 21 by line 22 and sent to the device 23 for chemical neutralization, which is also served by pipeline 20 precipitate heavy metals from the device 17 for removing heavy metals and residual oil. Wastewater from the device 21 for sludge dewatering pipeline 27 return into the sump centrifugal type. The device 23 for chemical neutralization mixing of contaminated oil sludge and fed by conveyor 24 chemical reagent on the basis of the lime with the formation of a hydrophobic insoluble complexes that are not dangerous for the environment. Processed in the reactor 23 sludge through the conveyor 26 is fed into the hopper 25.

1. Sposable disposal and recycling of crushed stone screenings and/or asbestos ballast, including loading it in the machine for washing, rinsing detergent solution containing technical cleanser, removing the washed sieve of ballast and supply it for the purpose, the removal of contaminated cleaning solution and subsequent purification by separation of the phases, removal of selected petroleum products and supply purified cleansing solution for re-using it for washing dropout ballast, characterized in that the washing of the dropout ballast lead by mechanical mixing dropout ballast with detergent solution containing technical detergent, after rinse screenings of the ballast and the contaminated cleaning solution away together and share, and when you split screening of ballast scatter on fractions with subsequent supply them to use, separated contaminated cleaning solution through the nozzle serves in the sump centrifugal type for cleaning by phase separation away from the sump separate flows of selected petroleum products, cleaning solution and the sludge is dewatered and then neutralized with the use of chemical reagents and wash solution was subjected to purification from heavy metals and residual oil and is recycled to the step of leaching screening of ballast, while the formed precipitate salts of heavy metals if the and brought to the stage of disposal of the sludge.

2. The method according to claim 1, characterized in that the washing solution, purified from the soluble salts of heavy metals, prior to the stage of leaching screening of ballast to compensate for losses impose additional technical cleanser that does not require heating of the water.



 

Same patents:

FIELD: ecology.

SUBSTANCE: invention relates to environment protection, in particular to purification of rubble and/or asbestos rail ballast from pollution with oil and can be used on rail transport. Installation contains receiving reservoir for supply of polluted ballast siftings for processing, device for washing, connected with pipeline for detergent supply. Device for washing is made in form of closed tub, is equipped with worm, loading device and device for joined removal of ballast siftings and polluted detergent solution. Installation includes unit of vibration sieves for separation of polluted detergent solution from ballast siftings and for sieving it into fractions, precipitation tank of centrifugal type with nozzles for supply of polluted detergent solution, pipelines for separate removal from precipitation tank of separated oil products, detergent solution and sludge, belt filter-press for sludge dehydration, reactor for chemical sludge neutralisation, galvanic coagulator for removal of heavy metal salts and residual oil products from detergent solution. Galvanic coagulator is connected by pipelines to device for washing and pipeline with reactor for chemical sludge neutralisation.

EFFECT: high degree of ballast siftings purification is achieved with simultaneous efficient phase separation, reduction of dangerous wastes formation and energy consumption for the process.

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FIELD: ecology.

SUBSTANCE: invention relates to environment protection, in particular to purification of rubble and/or asbestos rail ballast from pollution with oil and can be used on rail transport. Installation contains receiving reservoir for supply of polluted ballast siftings for processing, device for washing, connected with pipeline for detergent supply. Device for washing is made in form of closed tub, is equipped with worm, loading device and device for joined removal of ballast siftings and polluted detergent solution. Installation includes unit of vibration sieves for separation of polluted detergent solution from ballast siftings and for sieving it into fractions, precipitation tank of centrifugal type with nozzles for supply of polluted detergent solution, pipelines for separate removal from precipitation tank of separated oil products, detergent solution and sludge, belt filter-press for sludge dehydration, reactor for chemical sludge neutralisation, galvanic coagulator for removal of heavy metal salts and residual oil products from detergent solution. Galvanic coagulator is connected by pipelines to device for washing and pipeline with reactor for chemical sludge neutralisation.

EFFECT: high degree of ballast siftings purification is achieved with simultaneous efficient phase separation, reduction of dangerous wastes formation and energy consumption for the process.

2 dwg

FIELD: renewing or cleaning the ballast in situ, with or without concurrent work on the track.

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EFFECT: increased simplicity and reduced time of track recovery after ballast cleaning.

2 cl, 3 dwg

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EFFECT: improved cleaning of ballast using water.

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The invention relates to the field of railway transport, namely the travel machines for repair and restoration of railway, carried out without removing the rail-sleeper grid

The invention relates to the field of railway equipment, namely, rail road cars

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The invention relates to contribute to the economy

The invention relates to a device for repair of railway tracks

FIELD: railway transport; permanent way.

SUBSTANCE: method of cleaning of ballast 6 of rail track 4 by means of sieving plant 8 to separate litter and belt conveyor 14 and delivery of water comes to the following: ballast 6, after double cleaning mechanically and by means of water is again applied to rail track 4. Contaminated water is cleaned with formation of settled dirt which is then applied to litter for combined transportation by belt conveyor 14.

EFFECT: improved cleaning of ballast using water.

2 dwg

FIELD: renewing or cleaning the ballast in situ, with or without concurrent work on the track.

SUBSTANCE: method for track scanning in working direction directly in front of ballast grabbing means and for recovery of track position disturbed by ballast grabbing means involves sketching the first and the second measuring chords through two end points correspondingly in track working direction; measuring indicator height in the first measuring chord zone; displacing rear end point of the second measuring chord to correct track position in track transversal direction, wherein indicator height determined by the first indicator height sensor of the first chord and path measurements are recorded in memory to take the last end point of the first measuring chord as a given position point with respect to local track point. Then as end point of the second measuring chord reaches local point above point is displaced up to position in which measured value corresponds to that stored in memory and, thereby, to predetermined position thereof, due to the second measuring chord of the second indicator height sensor. Ballast cleaning machine comprises excavation car including height-adjustable track-lift, ballast grabbing means and sizing car arranged in front of excavation car in car working direction. The first measuring chord and indicator height sensor are attached to sizing car. The second measuring chord of path measuring system with rear end point defined with respect to working direction is associated with excavation car. Path measuring system comprises track indicator and memory to store value measured by the first indicator height sensor depending upon path and to compare thereof with measured value recorded by the second indicator height sensor.

EFFECT: increased simplicity and reduced time of track recovery after ballast cleaning.

2 cl, 3 dwg

FIELD: ecology.

SUBSTANCE: invention relates to environment protection, in particular to purification of rubble and/or asbestos rail ballast from pollution with oil and can be used on rail transport. Installation contains receiving reservoir for supply of polluted ballast siftings for processing, device for washing, connected with pipeline for detergent supply. Device for washing is made in form of closed tub, is equipped with worm, loading device and device for joined removal of ballast siftings and polluted detergent solution. Installation includes unit of vibration sieves for separation of polluted detergent solution from ballast siftings and for sieving it into fractions, precipitation tank of centrifugal type with nozzles for supply of polluted detergent solution, pipelines for separate removal from precipitation tank of separated oil products, detergent solution and sludge, belt filter-press for sludge dehydration, reactor for chemical sludge neutralisation, galvanic coagulator for removal of heavy metal salts and residual oil products from detergent solution. Galvanic coagulator is connected by pipelines to device for washing and pipeline with reactor for chemical sludge neutralisation.

EFFECT: high degree of ballast siftings purification is achieved with simultaneous efficient phase separation, reduction of dangerous wastes formation and energy consumption for the process.

2 dwg

FIELD: ecology.

SUBSTANCE: : invention relates to environment protection, in particular to purification of rubble and/or asbestos rail ballast from pollution with oil and can be used on rail transport. Siftings of rubble and/or asbestos rail ballast are loaded into device for washing. Washing of ballast siftings is carried out by mechanical mixing with detergent solution. After washing ballast siftings and polluted detergent solution are removed together and separated. During separation ballast siftings are separated into fractions and removed in order to be used in proper way. Separated polluted detergent solution is supplied through nozzles into precipitation tank of centrifugal type for pollution by separating phases. From precipitation tank separated oil products, detergent and sludge are removed in separate flows. Sludge is dehydrated and after that neutralised using chemical reagents. Detergent solution is subjected to purification from heavy metal salts and residual oil products. Formed deposit of heavy metal salts is periodically removed to the stage of sludge neutralisation. Purified detergent solution is supplied again to the stage of mechanical washing of ballast siftings. Before supplying detergent solution to the stage of washing, technical detergent which does not require water heating is introduced into it.

EFFECT: high degree of ballast siftings purification is achieved with simultaneous efficient phase separation, reduction of dangerous wastes formation and energy consumption for the process.

2 cl, 2 dwg

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