RU2262475C1 - Viscous oil product reservoir heating device - Google Patents

Abstract

FIELD: container equipment, particularly large containers having means for heating, cooling, aerating or other conditioning of contents.

SUBSTANCE: device includes reservoir with inlet pipe arranged in lower reservoir part and connected with inlet pipeline and heating means. Heating means is made as tubular heater enclosed with heat-insulation case. The heater is arranged from outside of the reservoir and in installed between inlet pipe and inlet pipeline. Heating agent circulating in the heater is single-phase nonfreezing heat carrier medium. Inlet pipeline is closed with heat-insulated box together with inlet and outlet lines for heat carrier medium along the whole its length to warm room. Inlet pipe is wrapped with heat-insulation jacket so that annular channel is formed. The annular channel communicates with inlet and outlet lines for heat carried medium.

EFFECT: increased reliability and reduced power inputs for device operation.

2 dwg

Description

The invention relates to tanks for viscous petroleum products with local heaters and can be used on the basis of storage and delivery of viscous petroleum products.

When viscous petroleum products are stored in unheated reservoirs, they have ambient temperature and in the cold season they thicken and lose fluidity at low temperatures. Under these conditions, local heating devices are used to collect viscous petroleum products from tanks.

A device for heating reservoirs with viscous petroleum products is known, which comprises a reservoir with an intake pipe located in its lower part connected to an intake pipe and a heater made in the form of a tubular heater enclosed in a casing with windows. The heater is placed inside the tank and is heated by water vapor [1]. The flowing steam heats the tubular heater and condenses inside it. The oil products filling the heater casing are heated, flow and are taken through the intake pipe and the intake pipe connected to it. The disadvantages of this device are low reliability in operation and significant energy loss. When the supply of water vapor to the heating device is stopped, the steam pipelines are quickly cooled, the condensate present in them flows to the lower points and freezes, causing the destruction of the steam pipelines. To avoid this, they provide a continuous supply of steam to the heating device even at a time when oil products are not taken from the tank, for example, at night, on weekends and holidays. This leads to a waste of energy. The heater is located inside the tank and at the slightest malfunction it requires very long and laborious operations for preliminary complete emptying and cleaning of the tank.

The closest in technical essence and the achieved result to this invention is a device for heating tanks with viscous oil products, containing a tank located in its lower part of the intake pipe connected to the intake pipe and heater, made in the form of a tubular heater enclosed in a heat-insulated casing [2]. The heater is located inside the tank and is heated by water vapor. The flowing steam heats the tubular heater and condenses inside it. The oil product inside the heat-insulated housing is heated, acquires fluidity and is taken through the intake pipe and the intake pipe connected to it. The disadvantage of this device is the low reliability in operation and significant energy loss. When the supply of water vapor to the heating device is stopped, the steam lines are quickly cooled and the condensate accumulating at the lower points can freeze, causing damage. The heater is located inside the tank and at the slightest malfunction it requires a very long and laborious operation to completely empty and flush the tank. The oil product is taken in portions from the tank. After stopping the selection of portions, the movement of the oil heated in the heater through the intake pipe stops. The intake pipe, together with the oil product filling it, is cooled, the oil product thickens and forms a “cork”. The “plug” of thickened oil in the pipeline is a significant obstacle to the selection of its next portion and violates the reliability of the operation of the entire heating system and selection of oil.

The invention is aimed at improving reliability and reducing energy consumption during operation of a device for heating tanks with viscous petroleum products. This is achieved by the fact that in the device for heating tanks with viscous petroleum products, the heater is located outside the tank and is installed between the intake pipe and the intake pipe, a single-phase non-freezing coolant is used as the heating agent circulating through the pipe heater, the intake pipe is enclosed in a heat-insulated pipe throughout its length to the heated room box together with pipelines for supply and removal of coolant to the tubular heater, and the intake pipe is wrapped outside with a thermally insulated jacket with the formation of an annular channel connected to the pipelines for supplying and discharging the coolant.

The invention is illustrated in the drawing, where figure 1 shows a diagram of a heating device, figure 2 is an element of circuit A on an enlarged scale.

The positions in the drawing indicate: a reservoir for viscous petroleum products - 1; intake pipe - 2; a heater - 3, made in the form of a tubular heater 5 enclosed in a thermally insulated housing 4; oil product intake pipe - 6; pipelines for supply 7 and outlet 8 of the coolant; thermally insulated box - 9; heating, circulation and flow control system for a single-phase non-freezing coolant - 10, including circulation pumps 11 and a heat exchanger heated by water vapor 12; insulated shirt 13 outside the intake pipe 2; annular channel - 14.

The heating device operates as follows. At the beginning of the working day, the circulation pump 11 is turned on and steam is supplied to the heat exchanger 12. The single-phase non-freezing coolant heated by the steam in the heat exchanger 12 is supplied by the circulation pump 11 and is supplied to the pipe heater 5 of the heater 3 through the supply and discharge pipes 8. The heat carrier heats the oil product filling heat-insulated housing 4 of the heater 3. When heated, the oil product becomes fluid. The heated coolant circulating through the inlet 7 and outlet 8 pipelines heats the intake pipe 6 located next to it inside the insulated duct 9 along with the oil product filling it. In addition, the coolant circulates through the annular channel 14 around the intake pipe 2, formed by the intake pipe 2 and a thermally insulated jacket 13 wrapped externally. This leads to the heating of the intake pipe 2 and adjacent layers of the oil product. Thus, using a single-phase non-freezing coolant, the entire sampling line and the oil product filling it are heated throughout the entire length from the tank to the heated room. Heated oil is easily taken along this line. At any time during the working day, the amount of heated oil in excess of the volume of the usual necessary portion is contained inside the insulated body 4 of the heater 3 and inside the intake pipe 6. After the selection of the portion, the cold oil product fills the selection system, flowing through the heated pipe 2 and the heater 3, and then warmed up in the intake pipe 6.

If it is necessary to select a large portion of the oil product, significantly exceeding the amount of oil product filling the insulated body 4 of the heater 3 and the intake pipe 6, the heating device is switched to the forced flow heating mode of the oil in the heater 3. In this mode, the flow rate of this given through the tube heater 5 is significantly increased. heater 3 single-phase non-freezing coolant by reducing its flow rate through heaters 3 of other tanks. In this forced heat transfer mode, the cold oil is heated when it flows from the tank through the heater 3.

After the end of the working day and the termination of the selection of oil products from the tanks, the heating device is turned off. To do this, the circulation pump 11 is turned off and the steam supply to the heat exchanger 12 is stopped. After that, the supply pipes 7 and the heat transfer pipes 8 enclosed in a heat-insulated box, as well as the intake pipe 6, together with the liquids filling them, are cooled. But the single-phase coolant that fills the inlet 7 and outlet 8 pipelines does not freeze. It maintains fluidity and does not cause destruction of pipelines. As a single-phase non-freezing coolant, for example, transformer oil can be used, which remains fluid when cooled to -35 ° C.

Placing a heat-insulated heater outside the tank, using a single-phase non-freezing coolant as the heating agent, concluding the intake pipe together with the supply and removal pipelines of the heating coolant to the heat-insulated box can significantly increase reliability and reduce energy losses during operation of the tank heating device with viscous oil products.

Sources of information

1. Auth. St. USSR No. 590191, B 65 D 87/38, BI No. 4, 1978.

2. Auth. St. USSR No. 466939, B 65 D 87/38, BI No. 17, 1975.

Claims (1)

A device for heating reservoirs with viscous petroleum products, comprising a reservoir with an intake pipe located in its lower part connected to an intake pipe and a heater made in the form of a tubular heater enclosed in a thermally insulated casing, characterized in that the heater is located outside the tank and is installed between the intake pipe and by a sampling pipeline, a single-phase non-freezing coolant is used as a heating agent circulating through a tubular heater; The entire pipeline along its entire length to the heated room is enclosed in a thermally insulated duct together with pipelines for supplying and discharging the coolant to the tubular heater, and the intake pipe is wrapped externally with a thermally insulated jacket to form an annular channel connected to the pipelines for supplying and discharging the coolant.

Images