RU166538U1 - RESERVOIR FOR OIL PRODUCTS - Google Patents

Abstract

1. A reservoir for viscous petroleum products with a heater installed in its lower part, which consists of a housing and heat exchange pipes inside it, characterized in that the heater is parallel to the bottom of the tank inside and outside the tank wall, into which it is fixedly and hermetically welded through a reinforcing ring; the heater body walls are solid, have no holes; a housing rib located inside the tank is hermetically sealed, a part of the housing located on the outside of the tank has an expansion tank equipped with a nozzle for oil filling and an air vent; the case ends with a cover on which heat-exchange pipes are fixed and pass through it, fastened together and having nozzles at the ends for entering and leaving the coolant; the cover with heat exchange tubes and nozzles is a removable structure. 2. The tank according to claim 1, characterized in that several heaters can be installed in it.

Description

The proposed utility model relates to reservoirs for petroleum products with local heaters.

In accordance with the requirements of the Order of the Ministry of Energy of the Russian Federation dated 19-06-2003 No. 232 “On approval of the rules for the technical operation of oil depots” (relevant in 2016), solidifying oil products must be stored in tanks equipped with thermal insulation and heating means, ensuring the preservation of the quality of oil products and fire safety.

Known insulated tank for storing oil and petrochemical products described in the patent of the Russian Federation No. 2388674, containing a metal body, bottom and roof with an internal heat-insulating layer, which is made of interconnected sheets of heat-insulating material, which together with the bottom are coated on the outside with a fuel-oil-resistant conductive material, at the same time, grounding elements are located on the bottom of the tank. However, this design has drawbacks: there is no way to control the internal heat-insulating layer, especially in the joints; there is no possibility of monitoring the condition of grounding elements located on the bottom of the tank, as a result of which the possibility of oil leaks in the places of welding of grounding elements is not ruled out;

Known double-walled metal tank, described in RF patent No. 2509703, containing the outer and inner walls, a heating cable, placed incomplete turns on the surface of the inner wall, thermal insulation, while the rows of incomplete rings of the metal pipe rigidly fixed to it are additionally fixed to it, the ends the rings are brought outside the outer wall, while the heating cable is placed inside the pipe. The disadvantages of this solution are the complexity and high cost of installing a hollow pipe; the possibilities of applying this solution only for tanks of small volumes.

Closest to the proposed technical solution and selected as a prototype is a reservoir for viscous petroleum products described in RF patent No. 590191 in which a heater is installed in the lower part, including a casing with windows and heat-exchange pipes enclosed in it, with the aim of increasing the heating efficiency petroleum products, the heater is installed with a gap relative to the bottom of the tank, and the casing windows are made in its lower part and are longitudinally located slots. The disadvantages of this solution: repair of such a heater is possible only on condition that the tank is decommissioned with full cleaning; moreover, it is possible that water (condensate) can get into the product when sections with heat-exchange pipes are skipped.

The objective of the proposed technical solution is to create the design of the tank for petroleum products, eliminating these disadvantages. The problem is solved by the design of the reservoir for viscous petroleum products with a heater installed in its lower part including heat exchange tubes, in which, in accordance with the proposed solution, the heater has the shape of a cylinder located horizontally parallel to the bottom of the tank on supports fixedly mounted on the bottom of the tank, the walls of the canister are solid ; the cylinder edge located inside the tank is hermetically sealed, the opposite plane protrudes beyond the boundaries of the tank and ends with a removable cap, which on the outside has nozzles for entering and leaving the coolant, from the inner heat transfer tubes fixedly welded to the cap; the case is equipped with an expansion tank for oil filling. A proposed utility model is shown in FIG. 1 and 2.

The tank includes a heater (1) located at the bottom, inside and outside the tank wall, as shown in figure 1. The heater consists of a housing, heat exchange pipes (8) enclosed in it, a removable cover (4). The heater body, has the shape of a cylinder (2), is located horizontally, parallel to the bottom of the tank, on supports (3), fixedly mounted on the bottom of the tank. The heater is motionlessly and hermetically welded into the tank wall through a fastening ring (6). The walls of the heater body are solid, have no holes, the cylinder edge located inside the tank is hermetically sealed. In the part of the heater that extends beyond the tank, there is an expansion tank (7), equipped with a pipe for filling oil and an air vent. Inside the housing are heat exchange pipes (8), fastened together by fasteners (9). Pipes are fixedly mounted on the cover, pass through it and have nozzles (5) at the ends for the inlet and outlet of the coolant. The cover with heat exchanger tubes and nozzles is a removable design. The heater is located at a height equal to the height of the receiving branch pipe of the tank, this ensures that the temperature of the oil product is maintained in a heated state in the pumping zone. The dimensions of the heater depend on the size of the tank and the temperature of the product being stored. All parts of the heater are made of steel. If necessary, several such heaters can be mounted in the tank, depending on the temperature that needs to be maintained.

The function of heating the oil in the tank is as follows. Oil is poured into the heater body through the pipe on the expansion tank (7). Heat transfer fluid is supplied to the heat exchange pipes through the pipe (5), which heats the oil in the heater body. When heated, the oil heats the walls of the heater body, providing a large area for heating the oil product. Depending on the oil product contained in the tank, the coolant is selected - sharp steam, heating water. The condition of the heat exchange pipes for the passage of coolant is monitored by means of an air vent installed on the expansion tank. When the heat exchanger tubes are passed, the oil will exit the air vent.

The proposed design is simple in execution and maintenance, makes it possible to repair the heater without decommissioning the tank, which is important for the efficient use of the tank farm. The absence of contact of steam (heating water) with the heated product completely eliminates the possibility of water entering the product, which is especially important for the safety of the process during storage of bitumen. Since a non-aggressive medium (oil) is used in the annulus, the life of the heater is more than 25 years. The ability to use various coolants allows you to use this design in tanks with petroleum products of various viscosities.

Reservoirs with heaters having the construction corresponding to the proposed solution are successfully used at LUKOIL-Nizhegorodnefteorgsintez LLC for storing oil vacuum epaulets, raffinates, extracts, distillate pumping oils, lubricating oils and oil bitumen.

Claims (2)

1. A reservoir for viscous petroleum products with a heater installed in its lower part, which consists of a housing and heat exchange pipes inside it, characterized in that the heater is parallel to the bottom of the tank inside and outside the tank wall, into which it is fixedly and hermetically welded through a reinforcing ring; the heater body walls are solid, have no holes; a housing rib located inside the tank is hermetically sealed, a part of the housing located on the outside of the tank has an expansion tank equipped with a nozzle for oil filling and an air vent; the case ends with a cover on which heat-exchange pipes are fixed and pass through it, fastened together and having nozzles at the ends for entering and leaving the coolant; the cover with heat exchange tubes and nozzles is a removable design. 2. The tank according to claim 1, characterized in that several heaters can be installed in it.

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