RU2584330C1 - Earthing device for stationary installations in oil and gas industry - Google Patents

Abstract

FIELD: electricity.

SUBSTANCE: earthing device comprises horizontal and vertical earth loops mounted in heat-insulated duct. The vertical earth loop is made as vertical heat pipes with low-boiling heat carrier and coupled to the horizontal earth loop of hollow pipes, through which heat is supplied by heat-carrying fluid from recuperative plate heat exchanger to radiator type. Heat to recuperative plate heat exchanger to radiator type is supplied from gas-turbine dispenser via hot gas charger. Heat-carrying fluid is circulated by the pump.

EFFECT: increased efficiency of the electric installation earthing due to increased heat transfer coefficient and increased square area of soil heating.

2 dwg

Description

The invention relates to the electric power industry and can be used as a protective grounding device for stationary installations of the oil and gas industry.

A ground electrode system is known, which is a device with additionally introduced vertical ground electrodes, which are made in the form of heat pipes with a low-boiling coolant and are located in a heat-insulated duct, while the heat pipes are connected by welding to the gas pipeline through a horizontal ground profile, and heat is supplied to the heat-insulated duct from a gas turbine pumping unit through a hot gas supercharger (patent RU No. 2317619, H01R 4/66, 2006).

A disadvantage of the known ground electrode system is the inefficiency of using supplied low potential heat from a gas turbine pumping unit through a hot gas supercharger due to large heat losses through the duct walls and a low heat transfer coefficient from gases to heat pipes. Thus, the time of heating the soil increases and the amount of heating of the soil decreases, which in turn reduces the effectiveness of the grounding device.

Therefore, the objective of the invention is to increase the efficiency of grounding of an electrical installation by increasing the heat transfer coefficient and increasing the area of heating of the soil.

Common to the claimed device and prototype are the following features:

- vertical ground electrodes, which are made in the form of heat pipes with a low-boiling coolant, are located directly in natural soil;

- the layer of the current-carrying volume of the material is in the non-freezing region of natural soil;

- Natural soil is constantly heated by additionally introduced vertical grounding conductors - heat pipes.

Distinctive from the prototype are the following features:

- heat is supplied to vertical grounding conductors - heat pipes - by means of a liquid heat carrier;

- the horizontal grounding profile is a circuit of pipes with a liquid coolant, through which heat is supplied to the vertical grounding conductors;

- the concentrator of the liquid coolant is a plate-type recuperative heat exchanger of a radiator type (see, for example, Nazmeev Yu.G., Lavygin V.M. Heat exchangers of thermal power plants. - M .: Energoizdat, 1998);

- the fluid is supplied by a circulation pump.

The inventive device is shown in FIG. 1, 2. FIG. 1: 1 - gas turbine installation, 2 - grounding conductor, 3 - horizontal circuit of pipes, 4 - hot gas supercharger. FIG. 2: 3 - a horizontal circuit of pipes, 5 - a vertical ground electrode - a heat pipe, 6 - a plate-type recuperative heat exchanger of a radiator type, 7 - a circulation pump.

The device contains (Fig. 2) vertical ground electrodes - heat pipes with a low boiling coolant 5, connected by a horizontal grounding loop of pipes 3, through which heat is supplied by a liquid coolant from a plate heat recovery heat exchanger, radiator type 6 under the action of a circulation pump 7. In FIG. 1 vertical ground electrodes - heat pipes - are connected to a plate-type recuperative heat exchanger of radiator type 6 by means of a horizontal grounding contour of hollow pipes 3, heat is supplied to a plate-type recuperative heat exchanger of radiator type 6 from a gas turbine pumping unit 1 through a hot gas blower 4.

The operation of the claimed device is as follows.

During the operation of the gas turbine pumping unit 1, exhaust gases (heat) are released, which, through the hot gas blower 4, enter the plate heat exchanger of the radiator type 6 and transfer the heat to the liquid coolant in the horizontal pipe loop 3 to the vertical ground electrodes - heat pipes 5, the heat is circulated in heat pipe and circulation in the horizontal pipe circuit heats the natural soil, improving its grounding functions. The charge from the gas pipeline through the grounding conductor, flowing along the horizontal grounding circuit 3 and the vertical ground electrodes - heat pipes 5, goes into natural soil.

The technical result of the device is to increase the grounding efficiency of the electrical installation, increase the heat transfer coefficient and increase the area of soil heating.

Claims (1)

A grounding device for stationary installations of the oil and gas industry, containing horizontal and vertical grounding loops installed in a heat-insulated duct, wherein the vertical grounding loop is made in the form of vertical heat pipes and is filled with liquid coolant, characterized in that the horizontal grounding loop is made of hollow pipes, additionally introduced a circulation pump and a recuperative heat exchanger, which is connected to the outlet of the hot gas supercharger and horizontal Earthlings circuit.

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