RU2733257C2 - Modular plant for recycling/decontaminating oil production wastes, petrochemistry and regeneration of oil well killing solutions - Google Patents

Abstract

FIELD: oil, gas and coke-chemical industries.

SUBSTANCE: invention relates mainly to oil production and is intended for utilization of oil production wastes, petrochemistry and preparation of process solutions. Modular unit is made in form of technologically connected main functional modules, each of which is made in factory conditions: process vessel, acid station with pump equipment, chemical mixer, heat exchanger, flotation unit, filter press, separation unit, floatation sludge tank, emulsion mixer, pump unit, wherein modules are connected to each other by pipelines and have dimensions allowing transportation of modules along motor roads.

EFFECT: possibility of recycling a wide range of oil production wastes, petrochemicals and can be used for preparing process solutions, modular design principle allows transporting it by road and installed directly at the place where wastes are formed.

1 cl, 1 dwg

Description

The modular unit refers mainly to the field of oil production and is designed for the disposal of oil production, petrochemical waste and the preparation of technological solutions.

Known installation for cleaning and clarifying waste drilling mud, including a line of drilling mud, a line of water and a series of hydraulically connected storage tank, pump, mixer of reagents, centrifugal apparatus and filter, static hydraulic mixer of waste drilling mud and water, the latter is hydraulically connected to the inlet of the storage tank, a shelf thin-layer clarifier installed at the pump outlet and a plunger pump hydraulically connected through a reagent mixer with the inlet of a thin-layer shelf clarifier, while a hydrocyclone with a spiral insert is used as a centrifugal apparatus, and an ejector mixer is used as a reagent mixer (RF patent No. 2030546) ... The disadvantage of the known installation is the limited scope (only for drilling mud).

Closest to the claimed invention is an installation for complex cleaning of drilling mud, drilling waste water and disposal of drill cuttings during well drilling, without the construction of barns (RF patent No. 2541957, pp. 9-11 of the formula). A device for implementing the method of complex cleaning of drilling mud, drilling waste water and disposal of drill cuttings, made in the form of technologically connected main functional blocks: a drill cuttings preparation unit, a preparation unit for injecting chemical reagents for neutralization, a chemical solution preparation unit, a filtrate purification unit and waste drilling solution, a block for dewatering drill cuttings, the blocks are connected to each other by pipelines and conveyors and contain a technologically connected vibrating sieve with 5-10 mm cells for cleaning drill cuttings from rock particles larger than 5-10 mm, a container with a device for mixing drill cuttings with drilling waste water or filtrate from a filter press, a pump for feeding liquid drill cuttings for decontamination, tanks for the preparation of reagent solutions for dewatering and deactivating drill cuttings, drilling waste water and drilling mud, screw conveyors for supplying dry reagents to tanks for their preparation, series-connected reactor tanks for the introduction and simultaneous mixing of a neutralizing and encapsulating composition, coagulant and flocculant, a container for the final "maturation" of drill cuttings before neutralization, a peristaltic pump for supplying the prepared drill cuttings to a filter press, a pipeline for discharge of the separated filtrate into the filtrate cleaning system or for the primary preparation of drill cuttings, the receiving hopper of the auger conveyor for the intake of dewatered drill cuttings with an installed screw mixer for mixing in the bunker of drill cuttings with a dry neutralizing and encapsulating composition with subsequent removal of the resulting product, deactivated hazard class 5 - drilled rock ", for example, on dump trucks, and for cleaning drilling mud and drilling waste water, pressure flotation equipment was used, in which drilling mud and drilling waste water are treated with compositions of chemical reagents, supplied from the tanks for preparation of reagent solutions, until the content of mechanical impurities and oil products decreases less than 20 mg / l.

The disadvantage of the known installation is that it does not allow for the purification of waste of inorganic acids and disposal / disposal of water-oil emulsion, coolant, liquid oily waste, waste oils with the release of industrial water, hydrocarbons, mechanical impurities and chloride salts.

The objective of the invention is to eliminate these drawbacks and create a modular installation that allows for the purification of inorganic acid waste and the disposal / disposal of oil-water emulsion, cutting fluid, liquid oily waste, waste oils with the release of industrial water, hydrocarbons, mechanical impurities and chloride salts.

The problem is solved by the proposed modular installation for processing and disposal of oil production, petrochemical waste and preparation of technological solutions, made in the form of technologically connected basic functional modules, each of which is manufactured at the factory: a technological vessel, an acid station with pumping equipment, a chemical mixer, a heat exchanger, a flotation plant, a filter press, a separation plant, a flotation sludge tank, an emulsion mixer, a pumping unit, while the modules are connected to each other by pipelines, and the technological tank is designed for receiving and temporary storage of liquid waste, made in the form of a metal parallelepiped, an acid station with a pump equipment is designed for the preparation and supply of aqueous solutions of acid or alkali by dissolving dry substances, a chemical mixer is designed to neutralize acid and alkali-containing waste, a heat exchanger designed Designed for additional heating of oily waste before separation, as well as for utilization of excess heat of chemical reactions, the flotation unit is designed to purify aqueous media from hydrocarbons and mechanical impurities by pressure flotation and contains a coagulation chamber, a saturator, a flotation device, a coagulant preparation station, a flocculant preparation station, circulation pumps and connecting pipelines, the filter press is designed for mechanical dewatering of flotation sludge and is equipped with a flotation sludge pump, a flocculant preparation station, a flushing pump, a recovery tank and a belt conveyor, the separation unit is designed to separate water and mechanical impurities from oil environments and contains a feed pump, centrifugal disc-type separator and water station, emulsion mixer is designed for preliminary preparation of oily waste for separation and is made in the form of a tank apparatus with a set of internal korodok, the pumping unit is made in the form of two units, one of which is designed for pumping waste from a container into a chemical mixer, for unloading media from the unit, for supplying a neutralized solution for cooling, and the second pumping unit is intended for supplying media to the skimmer, for unloading from the installation, and the modules are made with dimensions suitable for transportation by road,

The invention is illustrated by a technological scheme, where:

1 - technological capacity

2 - pump

3 - heat exchanger

4 - chemical mixer

5 - acid station

6 - pump

7 - coagulation chamber

8 - coagulant preparation station

9 - skimmer

10 - flocculant preparation station

11 - saturator

12 - pump

13 - capacity of flotation sludge

14 - filter press pump

15 - filter press

16 - flush pump

17 - technological tank (shipments from the flotation device)

18 - pump

19 - separator

20 - technological tank (shipment from the separator)

21 - pump

22 - technological tank (water from the separator)

23 - pump

24 - waste reception

25 - stream for neutralization

26 - solution for neutralization

27 - reagent

28 - neutralizer

29 - coagulant solution

30 - coagulant

31 - flow to the skimmer

32 - flocculant solution

33 - flocculant

34 - water-air mixture

35 - flow to saturator

36 - purified solution from the skimmer

37 - purified solution for shipment 38-flotation sludge

39 - flotation sludge to filter press

40 - cake (dehydrated flotation sludge)

41 - filtrate

42 - filtrate into a chemical mixer

43 - oily waste for separation

44 - oil product separation

45 - oil product for shipment

46 - water from separation

47 - mechanical impurity from the separator

48 - emulsion mixer

The proposed installation consists of the following modules.

1. Technological tank with a capacity of 58 m3 (module A) Technological tank 1 is intended for receiving and temporary

storage of liquid waste. Structurally, the container is made in the form of a metal parallelepiped in dimensions suitable for transportation by road. For filling and unloading waste, the tank is equipped with DN 65 mm and DN 100 mm fittings. In the upper part there are 4 hatchways. The medium is heated through a metal coil located at the bottom of the tank. Hot water or steam with a pressure of up to 0.6 MPa can be used as a heat carrier. Tank dimensions: length - 1 1285 mm, width - 2200 mm, height - 2785 mm. Weight - 5126.8 kg. The technological tank is equipped with thermal insulation.

2. Acid station with pumping equipment (module B)

Acid station 5 is designed for the preparation and supply of aqueous solutions of acid or alkali by dissolving dry substances. To prepare solutions, two vertical cylindrical polyethylene containers with a capacity of 3000 liters are used. Loading of dry substances is carried out through the top of the container. To intensify the dissolution process, propeller stirrers with electric drives are installed in the upper part of the tank. The propeller speed is 190 rpm. The prepared solution is supplied by metering pumps with a capacity of up to 6 m3 / h.

3. Chemical mixer (module B)

Chemical mixer 4 is designed to neutralize acid and alkaline waste. To intensify the neutralization processes, the mixer is equipped with electrically driven propeller mixers. Structurally, the container is made in the form of a metal parallelepiped in dimensions suitable for transportation by road. Mixer capacity 58 m3. For filling and unloading waste, the tank is equipped with DN 65 mm and DN 100 mm fittings. In the upper part there are 4 hatchways. The excess heat of neutralization is removed through a metal coil. The interior of the mixer is made of corrosion-resistant material. Tank dimensions: length - 11285 mm, width - 2200 mm, height - 2785 mm. Weight - 5126.8 kg.

4. Heat exchanger (module D)

Heat exchanger 3 is designed for additional heating of oily waste before separation, as well as for utilization of excess heat of chemical reactions. Heat exchanger type - spiral. Heat exchange surface area - 8 m2. Steam temperature - up to 180 ° С. Heat exchanger material - steel 316 (03X17H14M3). Weight - 420 kg.

5. Flotation unit (module D)

The flotation unit is designed for the purification of aqueous media from hydrocarbons and mechanical impurities by the method of pressure flotation. The unit includes a coagulation chamber 7, a saturator 11, a skimmer 9, a coagulant preparation station 8, a flocculant preparation station 10, circulation pumps 12 and connecting pipelines. Residual content of hydrocarbons in purified water - 20 mg / dm3, mechanical impurities - 20 mg / dm3.

Coagulation chamber 4 is a vertical cylindrical container with a stirring device. The water is supplied to the coagulation chamber from the bottom, the outlet is from the top, through flange connections on the vessel shell. The coagulation chamber is equipped with a mechanical stirring device driven by an electric motor through a gearbox. Stirring is necessary to intensify the coagulation process. Coagulation chamber capacity 3000 liters.

Saturator 11 - ADT-300 is used to prepare the water-air mixture for the flotator. Saturator 11 is a horizontal cylindrical apparatus 300 mm in diameter with filter plates installed inside. Clarified water is supplied through the fittings, compressed air is 0.6 MPa, a saturated water-air mixture is removed.

To prepare a working solution of a coagulant, a station for preparing a solution of a coagulant 8 is provided. It consists of a solution tank, a supply tank and a protective tray. The solution tank is a plastic container with a working volume of V = 0.535 m ³ (L = 1200 mm, B = 800 mm, H = 800 mm), which is equipped with: a branch pipe with a tap located in the upper part of the container for supplying water for dissolution; loading hatch with a funnel for loading powdery material; vertical mixing device; water level visual control system; emergency overflow; a branch pipe with a tap located at the bottom of the tank for draining the ready-made solution into the supply tank located under the solution tank.

The supply tank is a plastic container with a working volume of V = 0.535 m ³ each (L = 1200 mm, B = 800 mm, H = 800 mm), which is equipped with: a visual control system for the level of the finished solution; a branch pipe with a tap located at the bottom of the containers for emptying their contents; emergency overflow. To prevent possible accidental spills when preparing a coagulant solution, a protective tray serves.

Station for preparation and dosing of flocculant 10 - SPF is intended for preparation of aqueous solutions of flocculants with a concentration of 0.05-0.2% from granular powder. The maximum hourly productivity for the finished product is 150 l / h (SPF-500) with a polymer dissolution time of no more than 2 hours. The station is installed on a bed and is completed with an autonomous control panel. The station's reservoir consists of three chambers with a working volume of 150 liters each (SPF-500): a dissolution chamber, a maturation chamber and a selection chamber.

The preparation of a flocculant solution from a dry granular powder takes place in a dissolution chamber and a maturation chamber. The chambers are connected to each other in a single hydraulic system.

To create a water-air mixture, circulating pumps are used with the following parameters: flow rate - 25 m3 / h, head - 0.4 MPa. Pump type - centrifugal, console.

In flotation device 9 - SPC-10 suspended solids and oil products in water are removed. Floated contaminants are collected on the surface of the skimmer, and then, with the help of a spiral collector, they are collected and fed into the flotation sludge tank 13.

Flotator 9 - designed for high-performance purification by pressure flotation of waste water from various industries. The flotation device uses the principle of pressure flotation, based on the phenomenon of increasing the solubility of gases in water (in particular, air) with increasing water pressure. Clarification of water by the method of pressure flotation is carried out in the bath of the skimmer. The skimmer bath is a stainless steel tank with a diameter of 4100 mm and a height of 900 mm. A carriage with a drive and a spiral collection of flotation sludge are installed on the skimmer bath. The wetted parts of the skimmer are made of stainless steel. Parts not in contact with purified water are made of carbon steel. Water, pre-enriched with air in the saturator 11, is supplied to the skimmer bath, where, under the action of air bubbles, contaminants float to the surface of the water and are removed by a spiral collector.

Through distribution pipes mounted on a movable carriage, water mixed with a water-air mixture is evenly distributed over the area of the skimmer. The outlet of the purified water mixed with the water-air mixture is carried out in the bottom layers of the flotation tank. Clarified water is collected using a system of clarified water collection pipes, also mounted on a movable carriage, and then enters the outer section of the central glass, from where it is discharged through a branch pipe. Thanks to the distribution system for the supply of clarified water and the collection system of clarified water, installed on a movable frame, the principle of "zero speed" is implemented in the flotator, in which the flotation process is carried out in a fixed layer of water, which significantly increases the efficiency of the process.

The flotation sludge is collected by a spiral collector and then discharged into the inner section of the central glass and then, through a branch pipe, it is discharged from the skimmer.

The flotation device 9 has 2 independent drives for the carriage and the collector of flotation sludge. The drives are equipped with frequency converters. Adjusting the rotation frequency of the carriage drive allows achieving the "zero speed" effect at different flow rates of the treated water. Adjustment of the speed of rotation of the drive of the flotation sludge collector allows to obtain flotation sludge of various moisture The high rotation speed of the flotation sludge collector helps to remove a larger volume of flotation sludge at higher humidity. Decreasing the frequency of rotation of the collector allows to reduce the volume of flotation sludge and increase its concentration

To remove bottom sediment, a pit for collecting bottom sediment with a branch pipe is provided at the bottom of the flotation tank. The collection of bottom sediment is carried out using a bottom scraper. The bottom scraper is mounted on a carriage. To ensure periodic removal of sediment, the branch pipe is equipped with a pneumatic pinch valve. The valve is controlled from a pneumatic panel using a solenoid valve. To dump the bottom sediment, a short-term opening of the pneumatic pinch valve (3 ÷ 6 s) is performed. The valve opening period is set by the service personnel, depending on the amount of deposits formed on the bottom of the skimmer. The recommended interval is 30-90 minutes.

6. Filter press (module E).

Filter press 15 is designed for mechanical dewatering of flotation sludge. The filter press is additionally equipped with a flotation sludge pump 14, a flocculant preparation station, a flushing pump 16, a recovery tank and a belt conveyor.

The pump of flotation sludge 14 is a screw self-priming pump that supplies flotation sludge to the skimmer. Flow rate - 3 ÷ 9 m3 / h. Electric drive power - 2.2 kW.

Flocculant preparation station is intended for preparation of water solutions of flocculants with a concentration of 0.05 ÷ 0.2% from granular powder. The maximum hourly productivity for the finished product is 700 l / h with a polymer dissolution time of 30 minutes. The preparation of a flocculant solution from a dry granular powder takes place in a dissolution chamber and a maturation chamber. The chambers are connected to each other in a single hydraulic system.

The belt filter press is designed for dewatering water-containing materials. In the upper part there is a mixer, in which the flotation sludge is mixed with the flocculant solution. Then the mixed stream is subjected to gravity clarification and squeezing between filter belts. Extraction pressure 0.6 MPa. Filter belt width - 800 mm. Productivity 0.75 ÷ 5 m3 / h. The filter press is located directly above the recovery tank, into which the water from the rinsing of the filter belts flows down.

The flushing pump 16 is designed to supply water to the system for flushing the filter belts of the filter press and the recovery tank. Pump type - centrifugal console. Flow rate - 16 m3 / h, head - 1.0 MPa.

The recovery tank is designed for cleaning the filtrate and its subsequent use for washing filter belts. It is made in the form of a parallelepiped with a filter belt located in the upper part.

The cake (dewatered flotation sludge) is unloaded from the filter press by a belt conveyor. Belt width - 370 mm, conveyor length - 7000 mm, drive - 0.55 kW.

7. Separation unit (module G).

The separation unit is designed to separate water and mechanical impurities from oil media. The unit includes a feed pump, a centrifugal disc separator 19 and a water station. The feed pump delivers the medium to be cleaned to the separator. Pump type - screw, self-priming (flow rate 9.8 MPa, drive 4 kW). The water station provides control of the movable bottom of the separator to discharge the separated sludge.

The separator provides separation of the incoming stream into 2 liquid streams with different densities and a solid phase (mechanical impurity). Residual water content in oil after separation is 0.1 ÷ 0.5%. The rotational speed of the separator plates is 4150 rpm, the drive power is 15 kW.

8. Capacity of flotation sludge (module 3).

The capacity of flotation sludge 13 is intended for receiving and temporary storage of flotation sludge. Structurally, the container is made in the form of a metal parallelepiped in dimensions suitable for transportation by road. For filling and unloading waste, the tank is equipped with DN 65 mm and DN 100 mm fittings. A hatch-manhole is made in the upper part. The medium is heated through a metal coil located at the bottom of the tank. Hot water or steam with a pressure of up to 0.6 MPa can be used as a heat carrier. The capacity of the tank is 20 m3.

9. Emulsion mixer (module I).

The emulsion mixer is designed for preliminary preparation of oily waste for separation. Structurally made in the form of a capacitive device with a set of internal partitions. Weight 3560 kg.

10. Pumping unit NU-1 (module K).

The pumping unit is designed for pumping waste from tank 1 into a chemical mixer, for unloading media from UMGTNV, for supplying a neutralized solution for cooling. The unit includes pumps VKS (self-priming, 14 m3 / h, 0.28 MPa), CNS 13-66 (centrifugal sectional, 13 m3 / h, 0.66 MPa), CNS 38-110 (centrifugal section, 13 m3 / h, 1.1 MPa) connecting pipelines and valves.

11. Pumping unit NU-2 (module K).

The pumping unit is designed to supply media to the skimmer, to unload media from the UMPNV. The unit includes pumps, TsNS 38-66 (centrifugal sectional, 38 m3 / h, 0.66 MPa), TsNS 38-154 (centrifugal section, 38 m3 / h, 1.54 MPa), connecting pipelines and valves.

The installation is completed with modular blocks, depending on the production tasks of the Customer. From the waste entering the UMPNV unit for disposal / neutralization, products are produced that meet the requirements of current standards or technical specifications.

Modular blocks UMPNV have dimensions of 20-40 feet. containers, the weight of each block does not exceed 10 tons. Equipment installed in containers can be mounted in a stationary production building, which is more efficient for service personnel. The capacitive equipment is made of 09G2S steel, the chemical mixer is made of acid-resistant thermoplastic.

Installed power consumption of electricity does not exceed 80 kW.

Reagents used:

In the process of waste disposal / neutralization, reagents are used:

- building lime (GOST 9179-77);

- coagulant Aqua-aurat-30 (TU 2163-069-00205067-2007);

- flocculant "Praestol" (TU 2216-001-40910172-98);

- reagent BOK (TU 2449-056-41805307-2008);

- composition for the neutralization of oil-contaminated materials NIKS (TU 20.59.59-003-14563994-2018);

- caustic soda flaked (STO 00203312-017-2011).

When neutralizing waste acids and alkalis, waste solutions (waste) of alkalis and acids, respectively, can be used.

Received products.

In the process of waste disposal / neutralization at the proposed modular installation, products suitable for further use are obtained:

a) purified water GOST 23732 "Water for concrete and mortars";

b) purified water OST 39-225-88 "Water for flooding oil reservoirs";

c) a mixture of recovered hydrocarbons and oils TU 0258-002-14563994-2015 (for use as a component of boiler fuel, instead of other oil products for further processing at petrochemical and oil refining industries);

d) reduced sulfuric acid TU 20.13.24-007-14563994-2018 (for use in the process of mining, including by in-situ leaching);

e) sour tar TU 20.59.59-006-14563994-2018 (for the production of road bitumen);

f) gypsum and gypsum anhydrite stone for the production of binding materials (with the neutralization of sulfuric acid with lime) - GOST 4013.

Technology system.

The attached drawing shows a process flow diagram for the disposal / disposal of inorganic acid waste and the disposal / disposal of oil-water emulsion, cutting fluid, liquid oily waste, waste oils with the release of industrial water, hydrocarbons, mechanical impurities and chloride salts.

Waste is delivered to the disposal / disposal site by special vehicles. Drainage from the tank truck is carried out by gravity into the process tank 1. Then, by the pump 2, the waste 25 is fed into the chemical mixer 4, where the pH parameters are adjusted.

An aqueous solution of caustic soda (sodium hydroxide) with a concentration of 44 ÷ 50% is prepared as a neutralizing solution 26. When neutralizing sulfuric acid, the neutralization reaction is as follows:

2NaOH + H2SO4 = Na2SO4 + 2H2O

Next, the neutralized solution 28 is fed into the coagulation chamber 7. Additionally, a coagulant (aqueous solution) 29 is supplied to the pipeline. An aqueous solution of the coagulant is prepared at station 8 by dissolving dry coagulant 30 in water. "Aqua-Aurat - 30" is used as a coagulant. Specific consumption of coagulant for Al2O3 - 50 mg / l. The coagulant solution is supplied by dosing pumps with a flow rate of up to 100 l / h. In the coagulation chamber 7, the solution is kept for maturing.

The neutralized solution 31 together with the coagulant from the coagulation chamber 7 is fed into the flotation device 9. The flocculant solution 32 and the water-air mixture 34 are additionally introduced into the flow. The flocculant solution is prepared at the flocculant preparation station 10, and the water-air mixture in the saturator 11. Praestol 2540 is used as a flocculant. », The specific consumption of the flocculant is from 80 to 300 grams of the prepared solution per ton of dry matter.

To prepare the water-air mixture 34 for the skimmer, a saturator 11 is used. The purified solution 35 and air are mixed for 10 seconds inside the saturation chamber with air, and then the water-air mixture 34 is exited through the outlet. The purified solution 15 is supplied by a circulation pump 12 with the following parameters: flow rate - 25 m3 / h, head - 0.4 MPa.

After mixing the neutralized waste with reagents and a water-air mixture, the stream enters the flotator 9. The solution is purified by the pressure flotation method in the flotation tank. In the flotator, hydrocarbons and mechanical impurities are separated from the solution. The cleaned solution 36 is collected by means of a pipe system and discharged into a container 22.

The flotation sludge is collected by a spiral collector and then discharged into the inner section of the central nozzle and further, through the branch pipe 38 is discharged from the skimmer 9 to the tank 13.

The flotation sludge from the tank 13 with a dry matter content of 1 ÷ 2% is dehydrated on a belt filter press 15. The filter press is designed for mechanical dewatering of flotation sludge. Filter press 15 is additionally equipped with a flotation sludge pump 14 and a belt conveyor.

The pump of flotation sludge 14 is a screw self-priming pump that supplies flotation sludge to the filter press. Flow rate - 3 ÷ 9 m3 / h. The power of the electric drive is 2.2 kW. In the upper part of the filter press 15 there is a mixer, in which the flotation sludge is mixed with a flocculant solution. Then the mixed stream is subjected to gravity clarification and squeezing between filter belts. Extraction pressure 0.6 MPa. Filter belt width - 800 mm. Flotation sludge capacity - 0.75 ÷ 5 m3 / h. Discharge of cake (dewatered flotation sludge) 40 from the filter press is performed by a belt conveyor. Belt width - 370 mm, conveyor length - 7000 mm, drive - 0.55 kW.

The moisture content of the dewatered flotation sludge is 70%. Dehydrated flotation sludge 40 from the filter press is a waste - FKKO code 72330102394 "Sediment (sludge) of flotation treatment of oily wastewater containing oil products in an amount of less than 15%". Specific cake yield - 10 ÷ 15 kg / t of waste solution.

The filtrate 41 after the filter press 15 is fed into the chemical mixer 4 for additional adjustment of the waste hydrogen index.

The technological scheme for the disposal / neutralization of alkali waste is similar to the scheme for the disposal / neutralization of acid waste. Acid solutions are used to neutralize alkalis.

When neutralizing / utilizing waste with a predominance of liquid petroleum products, pump 2 feeds the emulsion through the heat exchanger 3 and the emulsion mixer 48 to the separator 19 for separation into the hydrocarbon phase, water and mechanical impurity. A demulsifier can be additionally supplied to the inlet of the emulsion mixer 48. Hydrocarbon phase 44 after separation is supplied under pressure to process vessel 20. Quality indicators of the hydrocarbon phase meet the requirements of TU 0258-002-14563994-2015 "Mixture of recovered hydrocarbons and oils". The pump 21 discharges the mixture of recovered hydrocarbons and oils from the unit.

Water 46 from the separator enters the tank 22, from where the pump 23 is supplied to the chemical mixer 4 for the subsequent separation of mechanical impurities and the remaining oil products. From the flotator 9, the separated oil product and mechanical impurity (flotation sludge) enter the process tank 13, and the purified water into the process tank 17. Purified water (GOST 23732, OST 39-225-88) is discharged from the unit by pump 18.

The flotation sludge 39 from the process tank 13 by the pump 14 is fed to the filter press 15 for dewatering. Dehydrated mechanical admixture 40 (FKKO code 74235101394 - "Oil-containing waste processing cake") with a press filter, a conveyor is fed into the body of a car for removal to the neutralization site.

Fresh water can be supplied to the separator to reduce the chloride content.

The proposed installation allows you to utilize a wide range of oil production, petrochemical waste and can be used for the preparation of technological solutions. In addition, the modular design of the unit allows it to be transported by road and installed directly at the waste generation site.

Claims (1)

Modular plant for disposal / neutralization of oil production, petrochemical waste and regeneration of killing solutions for oil wells, made in the form of technologically connected main functional modules, each of which is manufactured at the factory: a process tank, an acid station with pumping equipment, a chemical mixer, a heat exchanger, a flotation unit , a filter press, a separation plant, a flotation sludge tank, an emulsion mixer, a pumping unit, while the modules are connected to each other by pipelines, and the process tank is designed for receiving and temporary storage of liquid waste, made in the form of a metal parallelepiped, an acid station with pumping equipment is designed for the preparation and supply of aqueous solutions of acid or alkali by dissolving dry substances, a chemical mixer is designed to neutralize acid and alkali-containing waste, a heat exchanger is designed for additional heating and oily waste before separation, as well as for utilization of excess heat of chemical reactions, the flotation unit is designed to purify aqueous media from hydrocarbons and mechanical impurities by pressure flotation and contains a coagulation chamber, a saturator, a flotation device, a coagulant preparation station, a flocculant preparation station, circulation pumps, etc. connecting pipelines, the filter press is designed for mechanical dewatering of flotation sludge and is equipped with a flotation sludge pump, a flocculant preparation station, a flushing pump, a recovery tank and a belt conveyor, a separation unit is designed to separate water and mechanical impurities from oil media and contains a feed pump, a centrifugal disc separator and a water station, an emulsion mixer is designed for preliminary preparation of oily waste for separation and is made in the form of a tank apparatus with a set of internal partitions, the pumping unit is made It is in the form of two units, one of which is designed for pumping waste from a container into a chemical mixer, for unloading media from the unit, for supplying a neutralized solution for cooling, and the second pumping unit is intended for supplying media to the skimmer, for unloading media from the unit, modules are made with dimensions suitable for transportation by road.

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