Method of acid gas treatment for injection into formation through injector
FIELD: oil and gas industry.
SUBSTANCE: invention is related to oil and gas industry and namely to treatment methods of an acid gas containing hydrogen sulphide and carbon dioxide for injection into a formation through an injector. The concept of the invention is as follows: according to the method treatment of the acid gas for injection into the formation through the injector is made by the acid gas delivery to several compression and cooling stages at a temperature of 40÷60°C, drying of the compressed acid gas by glycol at a compressive pressure and temperature of 45÷65°C, transition of the dried gas into liquid state by further compression and cooling up to a temperature of 40÷65°C. At that before delivery to the compression stage acid gases are mixed with a liquefied gas C3-C5 or natural gasoline in quantity of 10÷40% by weight. Compression-cooling and drying of the acid gas is made at a pressure up to 0.4÷0.6MPa and its transition to liquid state is made at a pressure up to 0.8÷4.0MPa.
EFFECT: reduction of power consumption, reduction of gas hydrate formation risk, decrease in the number of compression and cooling stages for acid gases and utilisation of associated liquefied gases and natural gasoline containing hydrogen sulphide.
2 ex, 1 dwg
The invention relates to the oil and gas industry, and in particular to methods of preparation of acid gas containing hydrogen sulfide and carbon dioxide for injection into the formation via the injection well for the purpose of their disposal.
A known method of preparation of the acid gas comprising hydrogen sulfide and carbon dioxide for injection into the formation via the injection well in a mixture with water, which is in compression, acid gas compressors in several stages of compression to pressure 4,55÷14,0 MPa (depending on the composition of the acid gas with intermediate cooling acid gas after each stage cooling with getting sour gas in liquid form, which is at the same pressure is mixed with water having a pH of at least 7.5, and served on the cylinder and injection wells for the injection pump into the reservoir (U.S. Pat. USA, No. 6149344, NCI 405/128, publ. 21.11.2000).
The disadvantage of this method are considerable expenditure of energy required for compression acid gas compressor to a pressure of liquefaction, the corrosion of the equipment wet sour gas and increase the risk of formation of gas hydrates due to the high pressure compression acid gas.
The closest analogue to the present invention is a method of preparation of the acid gas to be injected into the formation via the injection well by filing an acidic gas in several stages
JUA is FL-cooling to pressure 2.5÷5.0 MPa and a temperature of 40-60°C, drying compressed gas glycol dehydration unit at the same pressure and a temperature of 45-65°C, transfer the drained gas into a liquid state by compressing to a pressure of 5.5÷10,0 MPa and cooling to a temperature of 40÷65°C and the injection of liquid acid gas into the formation via the injection well (U.S. Pat. RF, 2342525 IPC E21B 43/40, published 27.12. 2008).
The disadvantage of this method, taken as a prototype, is that there remains a need in significant energy costs associated with compressed gas sour gas compressor to pressure liquefaction, and increasing the content of carbon dioxide leads to a further increase in pressure required for liquefaction. The content of CO2in acid gas, which is obtained by amine treatment source of associated and natural gas, is determined by its content in these gases and may vary within considerable limits. The overwhelming content of carbon dioxide in the acid gas and the temperature of the compressed and dried sour gas 55-60°C by further compression acid gas according to the method, taken as a prototype, you cannot put it in the liquid state, because if the pressure at the same temperature and in the absence in the composition of the acid gas hydrocarbon components of LPG is its transition to a critical state, mine is the liquid state. Increased energy costs by a known method is also due to the energy costs for the recycling of glycol dehydration unit, in which the differential pressure between desorber and the absorber is up to 4 MPa and above. In addition, there is a risk of hydrate formation during compression acid gas to a pressure of liquefaction.
The objective of the invention is to reduce energy costs, reducing the risk of formation of gas hydrates, reducing the number of stages of compression-cooling acid gas removal and disposal of associated hydrogen sulfide-containing gases and gas gasoline.
The technical result that can be obtained by carrying out the method:
- reduction of energy costs for compression acid gas compressor, which is achieved by liquefying them at a lower pressure due to the introduction of the acid gas LPG C3-C5 and gas gasoline;
- reduce energy costs by recycling the glycol dehydration unit by carrying out drying at a lower pressure, which allows drying at a small pressure difference between the absorber and desorber, and leads to lower electricity for pumping glycol;
- reducing the risk of hydrate formation by reducing the pressure of the compression acid gas prior to liquefaction;
- disposal of contaminated acidic components of the liquefied gas and the gas is o gasoline by injection into a reservoir together with acidic gases.
This technical result is achieved by the method of preparation of the acid gas to be injected into the formation via the injection well by filing an acidic gas in multiple stages of compression and cooling at a temperature of 40÷60°C, drying the compressed acid gas glycol at a pressure of compression and the temperature of 45÷65°C, transfer the drained gas in the liquid state followed by compression and cooling it to a temperature of 40÷65°C and injection of liquid acid gas into the formation via the injection well, while the acidic gases before serving compression is mixed with liquefied gas C3-C5or gas gasoline, taken in an amount of 10÷40% by wt., moreover, the compression-cooling acid gas and the drying is performed at a pressure up to 0.4÷0.6 MPa, and a translation of it in the liquid state is carried out at a pressure of up to 0.8÷4.0 MPa.
The drawing shows a diagram of preparation of sour gas to be injected into the formation via the injection well.
The method is as follows.
Sour gas treatment unit source petroleum or natural gas from hydrogen sulphide and carbon dioxide (I) at a pressure of 0.05÷0.2 MPa serves on mixing with liquefied gas - a mixture of hydrocarbons C3-C5 or gas gasoline (II), then mixed stream is fed to the input of the compressor 1 compressor-cooling, in which the gas is compressed to a pressure of 0.4÷0.6 MPa. Next, the flow of compressed gas (III served in the fridge 2 (which may be in the form of an air cooler), in which it is cooled to a temperature of 40÷60°C, then cooled stream (IV) is sent to the separator 3.
In the separator 3, the cooled stream (IV) is separated into a gas phase - sour gas and condensate, with the sour gas stream (V) directed to the glycol dehydration in block 4, in which the gas is dried to a residual water content not more than 0.01 wt.%, and condensate (VI) is removed for recycling. The absorber unit 4 is irrigated with highly concentrated solution of triethylene glycol (TEG) (97,5÷of 99.5 wt.%). Dried sour gas (VII), containing liquefied gas or gasoline, with a temperature of 45÷65°C output from block 4 and is directed to the input of the compressor 7, where his win to pressure 0,8÷4.0 MPa, and compressed gas (VIII) is cooled in a water refrigerator or an air cooler 8 to a temperature of 40÷60°C. Under these conditions, the gas becomes a single-phase liquid state.
The cooled stream of liquid acid gas (IX) pump 9 is directed to injection into the formation through injection well (X).
Saturated water solution TAG, obtained by the dehydration of acid gas at a temperature of 45÷65°C derive from a bottom of the absorber drying unit 4 and is directed to capacity-expander, where the selection is physically absorbed in the TAG component acid gas, which recycle (XI) to the input of the compressor 1.
Water vapor (XII) is removed from the upper part of the regenerator unit ososki, cool in the refrigerator 5, and the cooled stream (XIII) served in the separator 6. The condensate (XIV) from the lower part of the separator 6 serves to mix with the condensate from the separator 3 and the combined stream (XV) sent for recycling. The gas phase from the upper portion of the separator 6 display and also sent for recycling (XVI).
The power savings of the proposed method is achieved by reducing the pressure of the acid gas liquefaction, which allows further compression acid gas prior to pressure injection (20÷24 MPa) into the reservoir in a liquid state with the use of the pump, which is more economical car than the compressor. The power savings can also be achieved by dehydration of gas glycol at a lower pressure.
Example 1. Sour gas installation amine scrubbing in the amount of 500 m3/h with a pressure of 0.05 MPa and a temperature of 40°C, mixed with the stream of liquefied gas. Sour gas contains 80% of hydrogen sulfide and 20% vol. carbon dioxide gas, and LPG consists of propane, butane and pentane in a ratio of 1:1:1 and its consumption is 330 m3/h Flow rate of the mixed gas - 830 m3/h, the content of components of liquefied gas is 39.8%. The mixed gas is then directed into the compressor, where the gas is compressed to a pressure of 0.4 MPa, and then cooled in a refrigerator to a temperature of 50°C, followed by the separation in the gas separa the ora of the principal amount of moisture in the form of condensate, which derive from the lower part of the separator in the amount of 33 kg/h To remove the remaining amount of water the gas phase from the upper part of the separator is sent to the absorber, irrigated with triethylene glycol. After the absorber, the moisture content in the gas having a temperature of 60°C is 0.01%. The compressed and dried so sour gas containing as a component of the liquefied gas, compressed by the compressor to the design pressure liquefaction of 0.8 MPa. Get the liquid in the number 1669.0 kg, which is cooled to 45°C and the pump serves to pump into the formation via the injection well.
Saving energy by reducing the pressure of liquefaction from 4.2 MPa prototype (for sour gas without mixing with liquefied gas) up to 0.8 MPa for the proposed method is 200 kWh per 1000 m3acid gas.
Example 2. Sour gas installation amine scrubbing in quantities of 1000 m3/h with a pressure of 0.08 MPa and a temperature of 45°C is mixed with the stream of liquefied gas. Sour gas contains 39% wt. hydrogen sulfide and 61% of carbon dioxide, and the ratio of propane, butane and pentane in liquefied gas are, respectively,
0,61:0,35:0.05, the consumption of it - 425 m3/h Flow rate of the mixed gas - 1425 m3/h, the content of components of liquefied gas to 29.8%. This gas is then compressed to a pressure of 0.6 MPa, cooled in a refrigerator at 5°C, followed by the separation in the gas separator of the principal amount of moisture in the form of condensate in the amount of 57 kg/h To remove the remaining amount of water the gas phase from the upper part of the separator is sent to the absorber, irrigated triethylene glycol. After the absorber, the moisture content in the gas having a temperature of 60°C is 0.01%. The compressed and dried so sour gas containing as a component of the liquefied gas, compressed by the compressor to the design pressure liquefaction of 3.8 MPa. Get the liquid in the number 2672.0 kg, which is cooled to 45°C and the pump serves to pump into the formation via the injection well.
The method of preparation of the acid gas to be injected into the formation via the injection well by filing an acidic gas in multiple stages of compression and cooling to a temperature of 40÷60°C, drying the compressed acid gas glycol at a pressure of compression and the temperature of 45÷65°C, transfer the drained gas in the liquid state followed by compression and cooling it to a temperature of 40÷65°C and injection of liquid acid gas into the formation via the injection well, wherein the acidic gases before serving compression is mixed with liquefied gas C3-C5or gas gasoline, taken in an amount of 10÷40% by wt., moreover, the compression-cooling acid gas and the drying is performed at a pressure up to 0.4÷0.6 MPa, and a translation of it in the liquid state is carried out at a pressure of up to 0.8÷4.0 MPa.
FIELD: oil and gas industry.
SUBSTANCE: set comprises a centrifugal pump with a submerged electric motor, an additional lower pump section with a drive from the submerged motor, a motor hydraulic protection, a packer, a nozzle. The packer disconnects producing and water-absorbing reservoirs. The nozzle connects the lower pump section with the under-packer space and has a plunger at the lower end. The plunger tightly enters the cylinder installed in the packer. The intake of the additional pump section arranged in its upper part is connected with a flat pipe to a well space below the producing reservoir. Blades of impellers of the lower pump section are made for opposite direction of rotation. Impellers are installed on the shaft of the lower pump section in the tilted position. If a water sublayer of the producing reservoir is arranged above the oil one, a dead partition is installed in the lower part of the nozzle. Above the partition there is a hole for water arrival from the well into the nozzle. Below the partition there is a hole made for water arrival into the under-packer space from the upper part of the additional pump section via a flat pipe. In the receiving part of the additional pump section there is a centrifugal separator for separation of oil and its discharge via a side hole in the pump vessel into the well.
EFFECT: invention may be used for dual oil production and water injection in water wells.
1 cl, 4 dwg
FIELD: oil and gas industry.
SUBSTANCE: plant includes a casing string with two entered formations, a pump lowered on a pipe string located in the casing string so that an inter-tube space is formed between them, which is separated with a packer located between entered formations. A pump is equipped with a plunger, an injection valve and a piston, which have the possibility of back-and-forth movement, upper and lower inlet holes with suction valves located above the packer and above and below the packer respectively. The pump outlet is interconnected from above by means of a pipe string through an injection valve to the well head, and from below through the lower injection valve to the space under the packer. The piston is free and has the possibility of interaction from above with the plunger and restricted back-and-forth movement. The plunger is equipped from below with a stock inserted into the piston with possibility of restricted back-and-forth movement. In the casing string there additionally arranged is a tube with a check valve, which connects the pump cavity between the piston and the lower injection valve with a delivery line through a shutoff member and the wellhead measurement equipment.
EFFECT: improving the oil extraction efficiency from the flooded well owing to providing direct control of quality and quantity of water pumped by a pump to the bottom formation of the well.
FIELD: oil and gas industry.
SUBSTANCE: method involves use of turbocompressor unit with low and high pressure stage, filter separator for removal of gas from condensate, water and mechanical impurities, which are installed before low pressure stage, and after low pressure stage - gas air cooling unit, separator for removal of gas from liquid with gas inlet, gas outlet and liquid outlet connection pipes, intermediate and end gas air cooling unit that is installed after the first and the second stages of high pressure, intermediate and end separators for removal of gas from liquid with gas inlet, gas outlet, condensate and water outlet connection pipes. According to the invention, the use of additional gas air cooling unit is provided, which is connected in series to outlet of gas air cooling unit located after intermediate separator of high compression stage of turbocompressor unit, and additional pump by means of which mixed flow of condensate and paraffin formation inhibitors is supplied via the pipeline to new supply assembly of condensate and inhibitor of hydrate formation between in-series connected gas air cooling units.
EFFECT: increasing operating efficiency of wells operated by means of gas-lift method due to avoiding condensation of hydrocarbons by means of additional removal of heavy hydrocarbons from oil gas at compressor station.
2 cl, 1 dwg
FIELD: oil and gas production.
SUBSTANCE: installation includes water-and-gas blowers with operating fluid pumps arranged sequentially in several compression stages. According to the invention the installation consists of water-and-gas separators mounted after every blower except the blower of the last compression stage. Note that gas pipe branches of water-and-gas separators are connected to the input gas pipe branches of blowers of corresponding compression stages, and water output pipe branches from water-and-gas separators are connected to the input pipe branches of operating fluid pumps, the output pipe branches of which are connected to the supply pipe branches of operating fluid blowers of corresponding compression stages.
EFFECT: increase of device operation reliability by means of increase of gas volume content in water-and-gas mixture at installation output.
FIELD: oil and gas industry.
SUBSTANCE: installation includes two-sector electric centrifugal pump driven with submersible electric motor located between sectors, packer separating upper and lower formations, seal sections located on both sides of submersible motor, connection pipe passing through the packer and connecting underpacker zone of the well to the inlet of pump lower section. At that, in order to pump the associated water separated in the well to below lying lost circulation horizon, the inlet of lower pump section is led out through the housing to above-packer space of the well by means of radial channels connected to cylindrical inlet cavity of the section. Pressure part of lower pump section is interconnected with underpacker space through side holes made in inner housing of the section, concentric cavity formed with inner and outer housings of the section and inclined radial channels connecting this cavity to under-packer space.
EFFECT: possibility of utilisation of associated water to lost circulation horizon without its lifting to the surface.
FIELD: oil and gas industry.
SUBSTANCE: device for extraction of well product and water pumping to formation includes perforated casing string in the interval of upper productive and lower receiving formations, tubing string, upper bottom-hole pump arranged in tubing string under dynamic level of accumulated oil and lower pump for water pumping to lower receiving formation. Also, device includes separating chamber, shank, non-return valve and packer installed in the well above the roof of receiving formation, accumulation chamber made in the form of separators-sediment traps. Additional packer is installed at the boundary of oil-water contact (OWC). Plunger of upper bottom-hole pump is rigidly connected to piston of lower pump having the possibility of restricted axial movement through the length of upper pump plunger stroke. Tubing string above the packer is equipped with radial holes for connection of water-bearing zone of productive formation to under-piston space of lower pump. Separating chamber is made in the form of the casing arranged concentrically outside tubing string from OWC level to upper pump inlet. At that, separators-sediment traps are provided on outer surface of the casing.
EFFECT: improving the separation quality of phases into oil and water and reducing electric power consumption.
FIELD: gas and oil production.
SUBSTANCE: here is disclosed system containing field installation with at least one producer and one pressure well connected with risers with points of filling and emptying, vessel with device connected with point of filling and emptying, receiving unit with device for filling and emptying reservoir on vessel. According to the invention the vessel is equipped with a three-phase separator of high pressure, with a pumping compressor and with equipment of water cleaning or equipment for water pumping. The receiving unit consists of devices for filling and emptying of high pressure at the vessel connected with the field installation wherein well fluid medium of high pressure is supplied into the separator and is divided into light fractions of gas, oil and heavy fractions of gas and water. Also, oil and heavy fractions can be supplied into storage reservoirs of high pressure on the vessel. They contain high pressure gas replaced from reservoirs when the pumping compressor pumps gas together with light fractions into a collector. Upon transportation of oil and heavy fractions of gas to the receiving unit they can be emptied by replacement of reservoir content with high pressure gas supplied from the receiving unit.
EFFECT: raised reliability of devices and efficiency of procedure.
32 cl, 3 dwg
FIELD: oil-and-gas industry.
SUBSTANCE: invention relates to gas-and-oil producing industry, particularly to winning of water-cut oil and utilisation of produced water. Installation includes packer, installed between top and bottom stratums, top and bottom pumps, blown down on tubing string into well and installed higher than packer, pump drives. Inlet of bottom pump is located lower than dynamic head of water precipitated under action of gravitation from water-oil mixture of top stratum, and outlet is communicated to under-packer space. Inlet of top pump is located higher than dynamic head precipitated water, and outlet is communicated to tubing string. Pumps are outfitted by drive, located on surface. Between worm shafts it is inctalled reducer, input shaft of which is connected to bottom of top worm shafts, and outlet - to top of bottom worm shaft of pumps. Reducer body is rigidly fixed to pipe lift string, and its gear ratio is selected so that correlation of efficiency of top and bottom pumps fit correlation of amount of water and oil coming into well with provision condition of gravity separation of water-oil mixture of top layer at opposite rotation of worm shafts.
EFFECT: creation of pumping unit, efficiency increase and design simplification ensured by elimination of additional devices, overlapping pumps inlets, lightening of service and regulation ensured by placement of drive on wellhead, and also fitting simplification of pumps of required efficiency and usage elimination of multidirectional pumps for cost saving.
FIELD: oil and gas industry.
SUBSTANCE: group of inventions refers transportation way of multiphase mixtures, particularly hydrocarbons from borehole by using positive displacement pump. According to the method multiphase mixture is dispensed by using positive displacement pump with following separation of gas phase and liquid phase. According to the invention liquid phase and gas phase are separated in positive displacement pump. From pressure side, partial liquid flow is branched from separated liquid phase of main transportation flow and delivered to thrust face of at least one ejector pump mounted as supply aid for suction side of positive displacement pump. Pump plant is provided with positive displacement pump with the case wherein discharge chamber is formed, and suction main. This main particularly approaches the borehole. According to the invention positive displacement pump is designed as polyphase pump. The case of discharge chamber accommodates separation unit providing separation of gas and liquid phase in discharge chamber. Delivery line connects discharge chamber of discharge chamber and high-pressure side of at least one ejector pump mounted from suction side towards positive displacement pump discharge, and supplies liquid phase separated positive displacement pump to ejector pump.
EFFECT: improved pumping multiphase mixture and simultaneously restricted required pump plant costs.
13 cl, 1 dwg
FIELD: oil and gas industry.
SUBSTANCE: invention refers to oil and gas industry, particularly to methods of preparing acid gases to pumping into reservoir through pressure well for utilisation of these gases. According to the invention acid gas is successively supplied into the first, second and the third blocks of compressing-cooling, consisting of a compressor, refrigerator and separator arranged successively; acid gas is compressed to 2.5-5.0 MPa pressure in the compressor of the third block of compressing-cooling, then gas is cooled to the temperature of 40÷60°C. Acid gas is supplied from the upper part of the separator of the third block of compressing-cooling to an absorber of a drying block; dried acid gas of 45÷65°C temperature is withdrawn from the upper part of the absorber and is transferred into a liquid one phase state by means of supplying to compressing up to 5.5-10.0 MPa pressure and cooling to the temperature of 40÷60°C. Further liquid acid gas is pumped through a pressure well into a reservoir. Acid components absorbed by an absorber-expander are extracted and supplied for mixing them with a flow of acid gas after the first step of compressing. Absorbent is regenerated in a regenerator. Water vapour extracted in the regenerator is cooled and supplied to mixing with water extracted in the separators of the first, second and third blocks of compressing-cooling, after that water is withdrawn for household use or for pumping into the reservoir.
EFFECT: facilitating exclusion of water usage at pumping acid gases into a reservoir; reduction of hazard of corrosion destruction of equipment and pipelines and preventing formation of hydrates.
SUBSTANCE: proposed radioactive waste storage (RWS) comprises a foreshaft 1, fixed with the steel shell 2, the well 4 drilled through this foreshaft 1 in rock mass 3, cased with the metal casing 6 with the bottom 7, the thermoinsulator 11 of inert waterproof and heat-resistant material, located on the inner generant of the metal casing 6, the external engineering protective barrier 9 with the lower protective screen 10 of bentonite-cement monolith, the internal engineering protective barrier 12 with upper protective screen 13, the aggregate state control system 14 of the material of the internal engineering protective barrier 12, made of pipes 15, tripping column 16 with containers 17, 18 placed on it with RWS, the radioecological monitoring system 20 and the lid 21 of the casing 6. The bottom 7 is provided with alighting bearing-centring hubs 8. The external engineering protective barrier 9 is created by grouting the annulus. The internal engineering protective barrier 12 with the upper protective screen 13 is formed inside the metal casing 6 with inert material which is solid in natural conditions, but able to change its aggregate state (solid-liquid) under the thermal effect.
EFFECT: invention improves environmental safety, area usage factor of land allocation intended for RW storage, increases the amount of waste of increased activity in the storage, reduces the labour intensity of RW storage decommissioning at the end of its period of use.
SUBSTANCE: invention relates to agriculture. The soil slurry-ground mixture for remediation of borrow pits and disturbed lands is proposed, which consists of two mixtures. At that the mixture used as a lower remediation layer comprises, volume percent: drill cuttings - 50-65, sand or sandy-loam soil - 16-25, peat - 15-23, the rest - active neutralising and ameliorating supplements, including gypsum or phosphogypsum in an amount of 2-3% of its volume. The mixture used as the upper remediation layer comprises, volume percent: drill cuttings - 35-50%, sand or sandy-loam soil - 20-30%, peat - 27-32.5%, the rest - active neutralising and ameliorating supplements, including gypsum or phosphogypsum in an amount of 1.5-2% of its volume. Also a method of remediation of borrow pits and disturbed lands is proposed.
EFFECT: group of inventions enables to improve fertility of disturbed lands and use more effectively the natural resources in Western Siberia.
10 cl, 1 tbl, 1 ex
FIELD: process engineering.
SUBSTANCE: invention relates to reclamation of soils. Method comprises placing solid household wastes in landfill bowl, disposal of drainage waters to evaporation pool, forcing wastes and air into injection wells arranged in refuse tip, and forming aerobic, transitional and anaerobic zones. Oil-bearing wastes with moisture content of 80-95% are injected into wells in frost-free season at air temperature above 5°C in amount required to allow optimum concentration of oil products in the mix with solid household wastes of 1-2 wt %. Then, air injected. Note here that aeration of refuse tip saturated with oil-bearing wastes is carried out via aforesaid oil-bearing wastes injection wells. Set of placed wastes is defined by the following formula:
EFFECT: faster setting and increased set.
2 cl, 4 dwg, 6 tbl, 1 ex
SUBSTANCE: insulating material contains clay and additionally a powdered composition of waste "non-contaminated dust of ferrous metals" from metallurgical production and dolomite flour, mixed in ratio of 1:3. To enhance biocidal action of the waste "non-contaminated dust of ferrous metals" from metallurgical production, a highly efficient preparation Bio Z is added.
EFFECT: material enables to reduce flammability of components of solid household wastes.
SUBSTANCE: method involves depositing a protective layer of air-permeable material onto the surface of solid household wastes, said air-permeable material being a powdered composition of waste "non-contaminated dust of ferrous metals" from metallurgical production and dolomite flour, mixed in ratio of 1:3. To enhance biocidal action of the wastes, a highly efficient preparation Bio Z is added. Primary methods of depositing the protective layer of air-permeable material are a float out method and a push method.
EFFECT: method cuts treatment time.
FIELD: process engineering.
SUBSTANCE: invention relates to community services, particularly, to sanitary purification. Municipal wastes are collected by trucks equipped with compacting facilities. Note here that unified container to carry wastes is fitted on the truck. Wastes are compacted by mounted compacting appliance. Said filled unified containers are delivered in territories of railway or water terminals for storage. Said containers are delivered from said territories on railway or water transport facilities and carried to stations of sorting, processing and recovery.
EFFECT: higher efficiency and reliability, better environmental protection.
6 cl, 1 dwg
FIELD: process engineering.
SUBSTANCE: storage comprises regional confining layer, said layer there above, at least one layer of loam and/or clay sediments making sorption (filtration) shield above sand layer, system of horizontal tubular drains fitted in sand layer along storage edges to extend to pits for possible feed of filtrate to surface. Proposed method comprises selecting regional confining layer proceeding from hydrogeological data on estimates of flows over refining layer, analysing engineering survey of soil stratum section town to refining layer to reveal shielding and filtering layers at future storage bed and excavating soil to reach, at least, one pillar of loan and/or clay beds making a natural sorption and/or filtration shield. Note here that, additionally, cuts in pillar are exposed along pit edges down to sand layer under lower filtration layers for laying horizontal drains along pit edges and mounting pumps therein.
EFFECT: decreased costs.
5 cl, 1 dwg
FIELD: process engineering.
SUBSTANCE: invention relates to power engineering and utility plants and may be used for non-polluting stockpiling of various wastes. Horizontal piezometer is arranged at accumulator foundation. Then, dam is dumped. Cell-like forms are arranged on foundation surface to be filled with ash concrete. Thus, anti-filtration ash concrete shield of foundation is produced. Ash concrete shields are made on inner slopes of said dam by laying ash concrete bulk in layers. Then, gas-escape drainage is installed on anti-filtration shield to be built up as accumulator comes filled layer by layer. After dumping next layer of wastes, intermediate ash concrete layer is dumped thereon. Waterproof shield made from ash concrete is created on the surface of filled accumulator to be covered by soil reclamation layer.
EFFECT: improved environmental conditions.
SUBSTANCE: invention relates to methods for burial of harmful and toxic wastes, in particular, chrome-containing ones. The method to bury chrome-containing wastes includes combination and layerwise refinement of a waste massif onto an upper insulation layer, a working layer, a protective adsorption layer, a lower insulation layer. The protective adsorption layer is represented by non-toxic industrial vegetable wastes, such as lignin, husks or chips. Insulation layers are industrial wastes of mineral origin, for instance, a lime cake (a mineral waste of sugar production) or slag of a waste incineration plant with an adsorption capacity by a chrome ion of at least 0.56 mg/g and low filtration coefficient. The ratio between the height of adsorption layer and the height of the lower insulation layer must make from 3:1 to 4:1.
EFFECT: method makes it possible to minimise carryover of toxic chrome ions from a massif of a chrome-containing waste, their negative impact to environment and a landfill body, to eliminate the necessity to use containers and warehouses for preliminary stacking and accumulation of huge masses of non-toxic wastes in areas of their occurrence, to increase duration of landfill operation.
3 cl, 2 tbl, 25 ex, 5 dwg
FIELD: process engineering.
SUBSTANCE: invention relates to environmental protection, particularly, to processing and storing of solid domestic wastes and may be used in communal services for disposal, transportation and burial of solid domestic wastes. Proposed method comprises briquetting of solid wastes, their transportation to location of burial, filling underground cavities via borehole extending to surface and bridging said borehole by backfill material. Casing is fitted in borehole. Briquetting is carried out with the help of device wherein solid domestic wastes are compacted and arranged in metal container made up of two hinged thin-wall semi-cylinders to be carried to location of burial Filled borehole is bridged by backfill material to drill new borehole above underfilled underground cavity whereto frame with mechanisms and lift crane for described cycle to be repeated unless exhausted gas deposit is completely filled.
EFFECT: expanded operating performances due to reuse of briquette containers.
8 cl, 10 dwg
FIELD: treatment and stacking of domestic solid wastes.
SUBSTANCE: the invention is pertinent to the field of treatment and stacking of domestic solid wastes, in particular, to joint stacking of domestic solid waste products and the bioadditives produced on the basis of the settling sewage, the surplus active sludge of sewage treatment plants and the filling agents - composts from the factories for the domestic solid wastes processing. The technical result is an increased sedimentation of the placed domestic solid wastes at the optimal values of concentration of introduced bioadditives, decreased required useful area to process the domestic solid wastes and increased accuracy of determination of a time of the sedimentation process termination. The method includes introduction of the bioadditives produced on the base of a mix of sludge of waste waters of the sewage treatment plants and composts from a factory on processing of the domestic solid wastes. At introduction of bioadditives in amount of 5-7 % of the total mass of the placed waste products, the contamination of which by microflora - decomposer makes 108 - 1010 cells/g. Intensification of the process of decomposition of organic components of placed waste products takes place and due to that increased their sedimentation. At that the value of sedimentation of the layers of the placed waste products is determined by formula: , where Hsed - a value of sedimentation of layers of the placed domestic solid wastes, in meters; h - initial value of height of the placed domestic solid wastes, in meters; τ - time of sedimentation of layers of the placed domestic solid wastes, in day; Т - time constant of the process of sedimentation of the layers of the placed solid domestic solid wastes, in days. The time of a maximum sedimentation is determined by the formula: t = 3 ·T, where t - time during which the sedimentation process falls into a zone of 5 % from the value of maximum sedimentation of the layers of the placed domestic solid wastes, that is the time of termination of the process.
EFFECT: the invention ensures increased sedimentation of the placed domestic solid wastes at the optimal values of concentration of the introduced bioadditives, decreased required useful area to process the domestic solid wastes, increased accuracy of determination of a time of the sedimentation process termination.