RU130666U1 - OIL HEATING DEVICE FOR THE MAIN PIPELINE AT THE OIL HEATING POINT - Google Patents

Abstract

1. A device for heating oil of a main pipeline at an oil heating station, containing plate heat exchangers, pipelines for supplying and discharging a high-temperature coolant - water heated to a temperature of plus 100 ° C, characterized in that valves are installed in the open position at the inlet and outlet of each heat exchanger and on the common heat exchanger line two valves are installed in series in the “Open” position, parallel to the plate heat exchangers are installed respectively at the beginning and at the end of the common heat line loaders, two valves in the “Closed” position and the bypass valve in the normal “Closed” position. 2. The oil heating device according to claim 1, characterized in that the bypass valve is adjusted to a pressure difference of 0.6 MPa at the inlet and outlet of the heat exchangers.

Description

The utility model relates to the field of pipeline transport, specifically, to a method for heating oil on trunk pipelines, and can be used both in the construction of new and in the modernization of existing trunk pipelines.

When pumping oil over long distances, in order to increase the throughput capacity of pipelines, it is heated at intermediate heating points (SPP).

A known method of heating oil in pipelines (see RF patent RU 2336456 from 10.20.2008; IPC: F 17D 1/18).

In this method, oil heating in the main pipelines is carried out using a heat exchange system installed at the oil heating points, including heating the intermediate heat transfer medium and heat transfer from the intermediate heat transfer medium to the pumped product. According to the invention, water is used as a heat carrier, the heating of which is carried out in a water boiler according to the schedule plus 110-80 ° C, the heated water is sent to the pipe space of the first heat exchange system, in which the temperature of the water circulating in the annulus according to the schedule 100-70 ° C is maintained, and this water is used to heat the pumped product to a predetermined temperature in a second heat exchange system.

However, the design complication and unsatisfactory solution to protect plate heat exchangers of the second heat exchange system from exceeding the maximum allowable pressure drop at the inlet and outlet of the oil pipeline should be considered a drawback of oil heating using two heat exchange systems

Common features with the studied technical solution are plate heat exchangers (ПТ), pipelines for supplying and discharging a high-temperature coolant - water, heated to a temperature of plus 100 ° С.

Pressure in the heating system occurs due to clogging of the space between the plates of the PT, mechanical impurities and paraffin deposits.

This device is closest to the claimed technical solution and taken as a prototype.

The technical result of the utility model is to prevent the destruction of heat exchange cassettes and increase the reliability of the oil heating point.

The technical result is achieved by creating a device for heating oil on main pipelines, including plate heat exchangers (two workers and one standby), the oil supply to which is carried out in parallel flows from a common reservoir. At the inlet and outlet of plate heat exchangers, valves are installed in the “Open” position, and the oil supply pipeline (common line of heat exchangers) have two shunt valves in the normal “Closed” position.

The set of essential features characterizing the utility model providing the indicated technical result for the oil heating device of the main pipeline at the oil heating station containing plate heat exchangers, pipelines for supplying and discharging high-temperature coolant - water heated to a temperature of + 100 ° C, according to the utility model, at the inlet and outlet each heat exchanger has valves installed in the “Open” position, and two are installed in series on the common line of heat exchangers valves in the "Open" position, parallel to the plate heat exchangers, two valves in the "Closed" position and the bypass valve in the normal "Closed" position, respectively, are installed at the beginning and at the end of the common line of heat exchangers.

The bypass valve is adjusted to a pressure differential of 0.6 MPa at the inlet and outlet of the heat exchangers.

The sources of patent and scientific and technical information have not found the above set of essential features, which allows us to conclude that the claimed object meets the criterion of "novelty."

In addition, the technical solution meets the condition of "industrial applicability", as it was tested.

The R&D carried out allowed us to create and launch a project to increase the throughput of the Usa-Ukhta oil pipeline under the name R-23. Within the framework of this project, to increase the throughput capacity of the Chikshino-Ukhta section of the Usa-Ukhta oil pipeline of SMN OJSC to 23.3 million tons per year, an oil heating station was built at the Chikshino pump station.

The oil heating point provides heating of all oil pumped through the NPS from the minimum temperature at the inlet of the Chikshino NPS plus 15 ° C to the design temperature plus 40 ° C.

Oil is heated in plate heat exchangers 11 (2 workers and 1 standby). Hot water with a temperature of plus 100 ° С is used as a heat carrier; oil is supplied to the fuel tank in parallel flows from a common collector.

The utility model is illustrated in the drawing. The drawing shows a diagram of a device for heating oil trunk pipeline at the point of oil heating where are indicated:

1, 2, 4 - 9 - valves in the "Open" position;

3, 10 - valves in the "Closed" position;

11 - plate heat exchanger;

12 - bypass valve in the normal "Closed" position.

The plate heat exchanger 11 is welded, consists of a body of circular cross section and heat exchange cassettes (TC). The plates are connected in the TC by automatic laser welding. The TC is placed in a special elastic metal corset, which provides resistance to linear expansion. Also, this corset provides mechanical fastening of the TC and the required flow direction of the coolant inside the housing.

Work.

Oil heating is carried out using a water boiler, a chemical water treatment unit. In addition, there are pumps for supplying fuel to the nozzles of the boiler, heat exchangers for heating the fuel in front of the nozzles, as well as pumps and plate heat exchanger blocks.

Hot water with a temperature of plus 100 ° С is used as a heat carrier, which is supplied in parallel flows from a boiler (not shown in the diagram).

To protect the plate heat exchangers 11 from exceeding the maximum allowable pressure drop and, therefore, from the destruction of the heat exchanger cartridges, an overflow valve 12 is additionally installed on the common line of heat exchangers in the normal “Closed” position, which allows you to automatically keep the pressure drop within acceptable limits by transferring oil to common collector, bypassing heat exchangers.

By design, this valve should be “normally closed”, and opening should occur when the set differential pressure is reached.

The application of the proposed utility model is to prevent the destruction of heat exchange cassettes and to increase the reliability of the oil heating point.

Claims (2)

1. A device for heating oil of a main pipeline at an oil heating station, containing plate heat exchangers, pipelines for supplying and discharging a high-temperature coolant - water heated to a temperature of plus 100 ° C, characterized in that valves are installed in the open position at the inlet and outlet of each heat exchanger and on the common heat exchanger line two valves are installed in series in the “Open” position, parallel to the plate heat exchangers are installed respectively at the beginning and at the end of the common heat line For the exchanger, there are two valves in the “Closed” position and the bypass valve in the normal “Closed” position. 2. The oil heating device according to claim 1, characterized in that the bypass valve is adjusted to a pressure difference of 0.6 MPa at the inlet and outlet of the heat exchangers.

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