Drainage tanks and their automation. Underground horizontal drainage tank, EP type

Depending on the water content in the oil and the operating mode of the reservoir, it is necessary to periodically drain the produced water as it accumulates in the reservoir. Commercial water formed in tanks during oil settling should be discharged into the industrial storm sewer. The bottom water from the tank is removed through a siphon valve.

Drainage of commercial water from the tank is carried out in the following order:

removal of the protective cover of the siphon tap;

inspection of the siphon valve, the absence of leakage through the gland seal is checked, the rotation of the valve must be smooth, without jamming;

removing the plug from the pipe of the siphon tap;

fastening to the branch pipe of the siphon tap of an oil-petrol-resistant sleeve and directing it to the sewerage system;

weakening of the glands of the sealing unit;

turning the branch pipe with a siphon valve to the “P” position;

smooth and small opening of the rotary valve until water appears, then full opening of the rotary valve. If there are bottom sediments in the tank, oil may appear when the valve is initially opened. In this case, it is necessary to close the valve, lift the intake pipe and repeat the operation;

produce bottom water drainage before oil appears.

After the end of the drainage of water from the tank, the following operations are performed:

close the rotary valve;

turn the intake pipe to the "P" position;

smooth and small opening of the rotary valve until oil appears, then close the valve;

turn the suction pipe to the “H” position

tighten the glands of the sealing unit;

turn off the sleeve and install the plug;

install protective cover.

When removing commercial water, it is necessary to constantly monitor its flow. Oil leakage must not be allowed. The flow rate of commercial water must be regulated by covering the siphon valve.

Conclusion

During my pre-graduation internship at Rybinskaya LPDS, I gained experience and practical skills in my specialty. The management of the Rybinsk LPDS provided me with all the necessary information and documentation in accordance with the approved curriculum, as well as the information I was interested in on production and management issues.

List of literature and normative and technical documentation

Technological regulations of the Rybinsk LPDS. 2007

Operating instructions for the main pump NM 10000-210.

Operating instructions for booster pump NPV 3600-90.

Instructions for use, maintenance and repair of the Worthington 20QLQ23/310/3 main pump.

Instructions for operation, maintenance and repair of dirt filters.

Tank equipment. N.I. Konovalov, F.M. Mustafin. Ufa 2005

RD 153-39-4-078-01. Rules for the technical operation of tanks, main oil pipelines and tank farms. Ufa: IPTER, 2001-177p.

PB 03-381-00. Rules for the construction of vertical cylindrical steel tanks for oil and oil products. M: Gosgortekhnadzor, 2001-168s.

"Transsibneft. Collective Agreement for 2007-2010”. Regulations on the remuneration of employees of OAO Transsibneft. 2007

"Transsibneft. Collective agreement for 2007-2010”. Regulations on bonuses for the main results of economic activity of employees of JSC Transsibneft. 2007

RD 13.100.00-KTN-225-06. The system of organizing work on labor protection in oil pipeline transport. Moscow 2006

STP-13.020.00-TSN-002-08. Wastes of production and consumption. Waste management of production and consumption. Omsk 2008

OT-PR-02-07. Instructions on labor protection for the commodity operator.

GOST 2517-85. Oil and oil products. Sampling methods.

R 50.2.040-2004. Metrological support of oil accounting during its transportation through the system of main pipelines.

Introduction…………………………………………………………………..... 2

General information about the enterprise and its tasks ……...………………… 3

Technological part.

1. Technological scheme of the Rybinsk LPDS and its brief description .... 4

   Object equipment. Specifications …………….... 5

   Equipment operation and maintenance ………… 13

Organizational and economic part.

1. Basic principles of remuneration ………………………………..…. 25

   Forms and systems of remuneration.……………..……………….……. 26

   Bonuses for the main results of economic activity of employees of JSC Transsibneft …….………….…….…………. 27

Labor safety and environmental protection.

1. Harmful and dangerous factors of production ………………………... 29

   Basic rules for the safe conduct of the technological process at the workplace …………………………………………………………. thirty

   Personnel protection equipment ……………………………………….... 33

   Characteristics of harmful emissions, wastewater and solid waste, their regulation ……………………………………….…….………….. 35

Individual task.

1. Oil sampling in reservoirs ………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………39

   Measuring the level of commercial water in tanks with a measuring tape ……………………………………………………………….….. 42

   Measuring the oil level with a measuring tape ……………….. 43

   Drainage of bottom water from the reservoir ………………………..…. 46

Conclusion……………………………………………………………..…. 47

List of literature and normative and technical documentation..... 48

In marking drainage capacity when ordering, indicate its type (EP or EPP), volume, internal diameter and material of execution.

Order designation example:

EP (EPP) 25-2000-1-1(2)(3)-K, where “EP” is an unheated underground drainage tank (“EPP” is an underground drainage tank with a heating system), “25” is the nominal volume in m³ , "2000" - internal diameter of the tank in mm; "1" - design; "1", "2" or "3" - material of manufacture ("1" - steel St 3sp4 GOST 380-90; "2" - steel 16GS GOST 5520-79; "3" - steel 09G2S GOST 5520-79); "K" - the presence of a concrete well.

Execution options for underground tanks EP / EPP:

• Capacities underground drainage horizontal type EP (without heating);
• Horizontal underground drainage tanks of the EPP type (with a heating system in the form of a metal coil or a heating cable);
• Climatic version U0 and T4 (up to -20 °С); U0 (up to - 40 °С); HL1 (up to -60 °С).
• Nominal volume from 5m³ to 63m³
• Tank EP / EPP can be equipped with thermal insulation.

Purpose of drainage tanks EP / EPP:

Underground tanks EP and EPP are used for storage of residues of oil products drained from process pipelines, both light and dark. Underground horizontal drainage tanks are widely used in Russian enterprises, since almost any production is faced with the need to drain the remains of liquid products used in the technological cycle. Underground storage tanks EP / EPP can store liquid products containing no more than 1.8% hydrogen sulfide in the gas phase.

EP tanks, as well as horizontal RGS tanks, used to collect liquids in small volumes (usually up to 63 cubic meters). For storage of large volumes of liquid raw materials are used vertical tanks (RVS). For storage of bulk products silos and hoppers are used.

Production of underground drainage tanks EP / EPP:

The production of containers must be carried out in accordance with. The manufacturing plant should use modern technologies for the preparation of rolled metal, welding, anti-corrosion treatment and loading for transportation.

General characteristics of underground drainage tanks EP / EPP:

• are used to store products from 2 to 4 hazard classes (according to GOST 12.1.007-76);
• designed for the temperature of the stored product: from -15°С to +80°С;
• designed for pressure inside the tank up to 0.07 MPa;
• Designed for the kinematic viscosity of the product drained into the EP / EPP up to 30 10 -6 m² / s;
• The density of the product drained into the EP / EPP is up to 1000 kg / m³

"RESERVE UAROS TROYEL" recommends ordering EP capacity/ EPP with internal and external anti-corrosion coating to increase their service life. The characteristics of the anti-corrosion coating are selected based on the characteristics of the product poured into the container and the mode of operation of the container.

Tank quality assurance:

Underground drainage tanks are manufactured in accordance with; TU.1415.004-466214309-2008. The quality of our EP containers is confirmed by the Permit for Use No.РРС.00-047039 and the Certificate of Conformity No.Ross.RU.AB17.po1286.

Warranty period of operation drainage tanks EP/ EPP manufactured by ZMK “REZERV UAROS TROYEL”: 18 months from the date of putting the equipment into operation, but not more than 24 months after shipment to the Customer from the factory.

Underground drainage tanks are used for temporary storage and collection of petroleum products at enterprises of the oil and gas and coke industries, as a tank for draining fuel from technological systems, for storing gas condensate, for draining residues of various aggressive liquids (oil, oil, diesel fuel, transformer oil, gasoline, alkalis, acids, wastewater, etc.). It should be noted that they are not used for draining LPG liquefied hydrocarbon gases.

Performance characteristics of drainage tanks

There are several requirements for the stored product and conditions at the facility:

• the temperature of the stored liquid must be in the range from -15°С to + 80°С
• kinematic viscosity of the liquid 30x10-6 m 2 / s
• density of the working product - no more than 1000 kg / m 3
• hazard class of working media 2, 3, 4 (see GOST 12.1.007-76)
• the content of H 2 S should not exceed 1.8%
• liquid explosion category and group - IIA-T3, IIB-T3 (see GOST 12.1.011-78)
• the minimum ambient temperature should not exceed -60°С

The underground location of the EP/EPP reduces the risk of the stored product being released into the environment.

Construction of underground drainage tanks

Structurally, they are a hollow all-welded vessel operating under a pressure of not more than 0.07 MPa, with a volume of 1 m 3 to 200 m 3, consisting of a metal cylinder and conical bottoms. For technological maintenance, two hatches are installed on the upper side of the shell: one for draining the stored product, the second for gaining access inside for preventive inspection, technological maintenance and repair (cleaning, blowing, washing). The discharge of the stored product is carried out using a semi-submersible pump.

The hull material must be resistant to the negative effects of the soil to prevent corrosion, chemical and physical changes. To do this, a waterproofing coating made of bitumen-polymer mastics is applied to the outside.

Saratov Reservoir Plant manufactures two types of underground drainage tanks:

• EP without heater
• EPP with heater for areas where the ambient temperature is below the freezing point of the liquid

The EPP tank body is heated by a metal coil in the form of pipes inside the shell, in which (pipes) the steam-water mixture circulates, or by a heating cable.

Production of underground drainage tanks

The Saratov Reservoir Plant has the EP and EPP necessary for the production of underground drainage tanks.

In addition, during the manufacture and installation, our specialists are guided by the following regulatory documents:

• GOST R 34347-2017 "Steel welded vessels and apparatus. General specifications"
• PB 03-584-03 "Rules for the design, manufacture and acceptance of steel welded vessels and apparatus"
• Industrial safety rules for hazardous production facilities using pressurized equipment
• STO 00220227-005-2009 “High pressure welded steel vessels and apparatus. General technical requirements»

All underground drainage tanks are made from the following steel grades depending on the operating conditions:

• St3sp for operation at temperatures up to -20°С
• 09G2S-9 for operation at temperatures not exceeding -40°C
• 09G2S-8 for areas where the average five-day temperature is below -40°С

Depending on the temperature of the operating area, the following designs of drainage tanks are manufactured:

• version 1 - design ambient temperature of the coldest five-day period is below -20°С
• execution 2 - temperature up to -40°С
• version 3 - operating temperature up to -60°С

Depending on climatic conditions, all drainage tanks are produced in three climatic versions:

• HL 1 for use in cold climates
• UHL 1 for temperate climates
• T1 - for tropical climate

For reliable operation, the design process provides for waterproofing and thermal insulation.

Technological piping of underground drainage tanks

At the construction site, all vessels are connected to a pipeline, which, on the one hand, goes to the drain filter of the pipe, and on the other, to a pump installed in one of the necks, or falls below the level of the so-called "dead residue", thereby creating a hydraulic seal that prevents spark formation during loading and unloading operations.

For reliable and safe use, EP/EPP tanks are provided with branch pipes and fittings for installing control and measuring and other equipment, for example, a thermometer, pressure gauge, devices for determining the amount of product (level gauges), a thermoelectric converter, devices for automatically stopping the supply or pumping out the product, alarm systems, shut-off and control valves.

The necessary equipment for loading and unloading operations are pumps and pumping units of various types and types, which facilitate technological processes. The pumps are manufactured in an explosion-proof and corrosion-resistant design with double sealing to reduce the risk of flames and exposure to the working environment.

Installation of pumps is possible at four levels: 3 m, 3.2 m, 3.7 m, 3.9 m.

At the request of the Customer, the pump can be installed in a concrete or metal well, which will protect the pump from the negative effects of the working product.

Tanks EP/EPP are delivered assembled. Only manholes and pipes longer than 1 m are transported separately. They (manholes and branch pipes) are cut off at a level of 0.4 m from the edge of the shell.

The height of the necks for routine maintenance and installation of pumps depends on the depth of the hull immersion in the ground.

All manufactured products are supplied with a passport, passed quality control and acceptance, certified by regulatory authorities.

Calculation, manufacture and supply of underground drainage tanks is carried out on the basis of the Questionnaire or the Customer's Terms of Reference.

Summary table of technical characteristics of underground drainage tanks EP / EPP

How to buy an underground drainage tank at the Saratov Reservoir Plant?

In order to find out the cost of an underground drainage tank, you can:

• contact our specialists by phone 8-800-555-9480
• send technical requirements (operating conditions, performance) or a completed Questionnaire by e-mail
• use the form ""

Saratov Reservoir Plant offers a comprehensive supply of your facility with products of our production. We also carry out engineering surveys, design of facilities, delivery of metal structures of our own production, installation of EP / EPP tanks, tanks and vessels.

§ The operation of draining reservoirs, containers to be carried out in agreement with the operator of the treatment facilities of shop No. 11. When draining tanks, pay special attention to the condition of the drained liquid (water, waste lye, soap).

§ The position of the siphon valve on the tanks must be marked with letters AT(water), P(product).

§ Before draining, make sure that the siphon valve is in good condition.

§ Set the tap (valve) to position B "water", indicated on the tanks.

§ Using litmus paper, measure the pH.

§ If the drained liquid during sampling contains water or soaps, then drain again.

§ An employee who drains tanks and containers must be nearby and monitor the drained oil product.

§ If an oil product appears in the drained liquid, the valve should be closed until only water appears or completely closed and the tank, the container, should be considered prepared for pumping.

§ After the end of drainage, the siphon should be turned to the P “product” position during the cold season.

§ In the shift log after the termination of drainage of tanks, containers, it is necessary to reflect: the coordination of their actions, the pH in the drained liquid, the start and end of drainage.

§ Each watch, while bypassing tank farms, must make sure that all siphon valves are in the closed position and there is no uncontrolled and unauthorized discharge of oil products, which is possible as a result of actions of persons not related to the maintenance of this facility. If such facts are found, inform the management of the workshop, the plant dispatcher, and act in accordance with the PLAS.

3.2. SAFETY REQUIREMENTS FOR DRAINAGE

Reservoir drainage works are gas-hazardous works of the 2nd group. These works are carried out without issuing a work permit, but with the obligatory registration of such work before they begin in the shift log of the site.

§ Drainage of produced water should be carried out no earlier than 2 hours after the cessation of movement of the oil product in the tank, container.

§ The composition of the team of performers is at least 2 people.

§ Drainage should be carried out in a filtering gas mask and in the presence of an understudy.

§ The drainer and observer should stand with their backs to the wind.

§ When working with drainage water, it is necessary to use personal protective equipment: goggles, rubber gloves.

§ On contact, drainage water may cause eye, respiratory and skin irritation. Avoid contact with eyes, skin. Do not allow them to enter the gastrointestinal tract.

§ When sampling drainage water, when carrying out minor repairs (tightening valve stuffing boxes, sealing flange connections, preparing equipment for repair, etc.), short-term contact of workers with oil products that have a harmful effect is possible. Therefore, all workers and engineers are allowed to work independently after passing the safety briefing (introductory, primary, special), fire and gas safety, as well as internships at the workplace and testing the acquired knowledge by the workshop commission.

3.3. STRICTLY FORBIDDEN

§ Discharge of drained fluid past the sewer pit or undercutting communications.

§ Drain the oil product into the sewer.

§ Leave the siphon valve in position B "water" in cold weather to avoid freezing.

§ Leave the siphon valve open unattended.

§ Use for opening and closing a tool not specially designed for this purpose in order to avoid breakage of the valve valve.

§ Rotate the siphon valve in the open position.

§ Violate the rules established by the labor protection instruction “According to the fire safety rules in workshop No. 3”, section 3.5.2. IOT-3-008.

§ Allow persons who are not familiar with this manual to work.

3.4. RESPONSIBILITY

In case of violation of the instructions, the culprit bears administrative and financial responsibility

4. Registration of changes to the local regulatory document

Table 1

Changelog Instructions

At the PSP, to collect oil leaks and drainage from dirt filters, a safety device assembly, emergency emptying of furnace coils, accounted and unaccounted for oil from the SIKN measuring lines, underground horizontal tanks are used:

• horizontal tank EP-1 V = 63 m Z (1 pc.), installed underground for drainage of dirt filters, furnaces, pumping station, unaccounted for oil after SIKN;
• horizontal tanks for the heat carrier EP-6, EP-7 V=40m Z (2 pcs.), installed underground for drainage of the furnace heat carrier;
• horizontal tank EP-2 V = 12.5 m Z (1 pc.) for the drainage of the studied oil after the SIKN, installed underground;
• horizontal tank type RGSp V = 10 m Z, installed underground to collect the oil spill from the AC site;
• for commodity tanks, draining oil from tankers at the AC site horizontal tanks EP-4, EP-5, V=63 m3, installed underground.

In the event of an accident, oil is collected from the embankment of one of the commodity tanks R-1,2,3 by mobile means into the drainage tank EP-4, EP-5, followed by pumping to the adjacent RVS.

Oil is pumped from drainage tanks to the tank farm using a semi-submersible pump unit with a nominal flow of 50 m 3 / h and a head of 80 m.

Oil is pumped out from the drainage tank of the recorded oil into the pressure oil pipeline using a semi-submersible pumping unit with a nominal flow of 12.5 m 3 / h and a head of 200 m.

Pumping units and fittings have climatic design HL and placement category 1 according to GOST 15150-69. Pump units are adopted in accordance with OTT-23.080.00-KTN-138-09 “Electric pump units for pumping oil leaks from collection tanks at the PSP. General technical requirements ”with changes in terms of climatic design and Q-H characteristics for the unit for pumping oil from a tank at SIKN.

Tanks for collecting oil leaks and drainage belong to the explosive zone of the 1st class according to GOST 30852.9-2002 and according to explosion and fire hazard to the category of outdoor installation AN according to SP 12.13130.2009. Category (GOST 30852.11-2002) and group (GOST 30852.5-2002) of an explosive mixture of flammable liquid vapors with air - IIA-T3.

Pipelines and fittings of drainage and leakage collection systems located in ventilated shelters and outside shelters, including sections of underground laying to connection points to oil leakage collection and drainage tanks, are provided in thermal insulation with electrical heating.

To prevent the penetration of the flame into the tank when igniting explosive mixtures of gases and vapors with air coming out of it, the tank is equipped with a flame arrester.

The tanks are equipped with automatic devices to protect them from oil overflow. On the body of the tanks there are two plates on different sides for connection to the grounding device. At the points of connection to the grounding device, identification marks are provided in accordance with the PUE (Edition 7), clause 1.7.118.

The tanks are equipped with an intrinsically safe ladder for access inside.

A special fitting is provided to supply steam when steaming the container. Steaming is provided for the period of repair work.

Drainage tanks are equipped with a neck for the installation of a pumping semi-submersible vertical unit with an explosion-proof electric motor. The height of the tank neck (1300 mm) ensures the installation of a pumping unit on it without transitional support pipes.

The technical characteristics of the pump unit are presented below (Table 10).

Technical characteristics of the semi-submersible pump unit for tanks EP-1,3,4,5

Technical characteristics of the pumping unit for the EP-2 tank

On the discharge pipeline of the pump between the pump and the valve, a check valve is provided to prevent the reverse flow of the pumped oil, in accordance with GOST 32569-2013 “Technological steel pipelines. Requirements for the device and operation in fire-explosive and chemically hazardous industries” p.4.11.

In order to avoid solidification of oil in the winter, emptying of the above-ground sections of the pressure pipeline of the pump installed on the tank is provided.

Embedded structures of selection devices (instrumentation and control devices) for pressure measurement are provided on the discharge pipeline of the pump. For safety reasons, embedded structures are used with closed drainage systems in accordance with SZK 14-2-2009.

Anti-corrosion protection and thermal insulation of containers

The tanks are designed with anti-corrosion insulation of the outer surface in the factory.

As a heat-insulating material for tanks EP-1..EP-5, a polyurethane insulation 100 mm thick, applied at the factory, fire resistance category G4, was adopted; for coolant drainage tanks EP-6.7, thermal insulation is not provided.

Thermal insulation and electrical heating are included in the manufacturer's delivery set.

Enamel PF-115 GOST 6465-76 (2 layers) according to the primer FL-03Zh GOST 9109-81 (1 layer) or analogues is provided as a factory anti-corrosion coating (external).

As a cover layer, a factory reinforced type anti-corrosion coating according to GOST 9.602-2005 with a thickness of at least 4.6 mm is provided:

• primer NK-50 according to TU 5775-001-01297859-95 or according to TU of other manufacturers - 1 layer;
• insulating tape "Polylen" 40-LI-63 450x170 according to TU 2245-003-01297859-99 or according to TU of other manufacturers - 2 layers, at least 2.0 mm thick each;
• outer wrapping "Polylen-OB" 40-OB-63 according to TU 2245-004-01297859-99 or according to TU of other manufacturers - 1 layer, 0.6 mm thick.

To protect against internal corrosion of capacitive equipment, it is recommended to apply a coating of the following design: epoxy-phenolic coating - 3 layers 120 microns thick. The total thickness of the protective coating is not less than 360 microns.