RU174286U1 - BOILER HEATING BOILER - Google Patents

Abstract

The utility model relates to the field of electric heating of a heat carrier (liquid technical media, water, oils), in particular, heating thermal oil during melting and heating of road bitumen to operating temperatures at production facilities of the road sector. The purpose of the utility model is to increase the heating efficiency and maintainability of a heat carrier heating boiler. The essence of the utility model lies in the fact that the electric heat carrier heating boiler, containing the tank, intake and return pipes, sealed finned thermoelectric electric heaters (TENs), temperature and level sensors, and metal sealed relative to its internal volume box-cases are welded into the container, into which finned sealed TENs are inserted from the open outer part so that they are in good contact with the inner surface of the box-case. In the boiler of heating the coolant between the free inner surface of the box-case and the fins of two adjacent heating elements, metal inserts of triangular shape in cross section are introduced along the entire length of their fins, ensuring reliable contact of the outer surfaces of the insert with the inner surface of the box-heating case and the fins of two adjacent heating elements.

Description

Heating of liquid coolants is carried out in indirect heating systems by electric heaters or a flame of an oil / gas burner.

The utility model relates to the field of electric heating of a coolant (liquid technical media, water, oils), in particular, heating thermal oil during melting and heating of road bitumen to operating temperature at production facilities of the road sector.

Known electric heater (patent RU No. 45884, IPC Н05В 3/28, publ. 27.05.2005) for heating liquid heat carriers, comprising a housing with a lid and a bottom, inlet and outlet pipes with tubular heating elements located inside.

Known electric heater for flowing fluids (patent RU No. 2499369, IPC Н05В 3/34, publ. 11/20/2013), comprising a housing with a flexible heating element located inside.

The closest technical solution is a system for heating bitumen in a surface bitumen storage (patent RU No. 86196, IPC Е01С 19/08, published on 08.27.2009), in the lower part of which pipes are radially welded into which sealed heating elements are placed. In order to increase the heat transfer coefficient from the surface of the heating elements to the heating pipes, the pipes are filled with fine-grained aggregate (for example, quartz sand with a thermal conductivity of 6 kcal / m⋅ ° C⋅h).

However, as follows from the results of operation, this technical solution has the following disadvantages:

the complexity of the regulation of sealed heating elements, due to the need to remove fine-grained filler before removing the heating elements and filling the space inside the heating pipes when installing the heating elements after routine maintenance;

low heating surface of the heat-transfer surface, limited by the diameter of the heating pipes and the diameter of the storage tank;

the possibility of sintering fine-grained filler and the failure of sealed heating elements, the complexity of the subsequent extraction and use of sections of heating elements.

The objective of the proposed utility model is:

improving the convenience of routine maintenance (maintainability);

improvement of thermal performance.

The essence of the utility model lies in the fact that the electric heating medium heating boiler, which contains the tank, intake and return pipes, sealed finned thermoelectric heaters (TENs), temperature and level sensors, metal sealed into the tank, are sealed relative to its internal volume of the box-case, into which finned sealed heating elements are inserted from the open outer part so that they, with their finning, reliably contact the inner surface of the box-case;

in the boiler of heating the coolant between the free inner surface of the box-case and the fins of two adjacent heating elements, metal inserts of a triangular shape in cross section are introduced along the entire length of their fins, ensuring reliable contact of the outer surfaces of the insert with the inner surface of the box-case and the fins of two adjacent heating elements.

The technical result.

Improvement of maintainability is achieved by using finned sealed heating elements that do not require additional operations before routine maintenance: the heating elements collected in the sections are removed and their diagnostics and / or replacement are performed.

Improving the thermal characteristics of the heat exchanger is achieved through the use of box-cases, in which finned sealed heating elements are inserted from the open outer part so that they are in good contact with the inner surface of the box-case, which allows you to set the desired area of the heat-transfer surface and heat transfer from the sealed TENOV to cases-cases through metal elements of fins TENOV or metal inserts of a triangular shape in cross section, that is, through Methods and material having a large thermal conductivity (the thermal conductivity of steel 40 kcal / ° m⋅ S⋅chas).

The specified task is achieved:

the installation of metal box-cases tight in relation to its internal volume in the boiler’s tank, that is, by creating cavities inside the tank to accommodate electric heat sources that are not directly in contact with the heated medium and providing the required heat-transfer surface;

heat transfer from the heating elements of the heat-transfer surface of the box-cases through the contact of the metal fins of sealed heating elements directly or through additional metal inserts.

The essence of the utility model is illustrated by drawings, where in FIG. 1 is a front view of a heat transfer boiler boiler; FIG. 2 is a left side view of a heating medium heating boiler; FIG. 3 - box-case.

The electric heating fluid heating boiler contains a tank 1 with temperature sensors 2 and level 3, intake 4 and return 5 pipes, box-cases 6, with sealed finned heating elements 7 installed in them and metal inserts of triangular section 8.

The utility model works as follows.

Before turning on the heating boiler, the boiler capacity must be filled with the working fluid to the required level regulated by the sensor 3. Electric current is supplied to the contacts of the sealed finned heating elements 7. Heat is transferred from the heaters through the contact points of the heating elements to the heating elements and / or through the metal inserts 8 (when used). the wall of the box-case 6 and the heated medium - the working fluid. Heated to a working temperature controlled by temperature sensor 2, the pump pumps liquid into the system through the intake pipe 4 and returns from the system through the return pipe 5.

If it is necessary to replace the heating elements, the metal inserts 8 (when used) are sequentially removed from the box-cases 6, and then the finned sealed heating elements 7 in the assembly carry out the replacement of the heating elements (s). Draining the working fluid from the system is not required.

The use of box-cases tight with respect to the internal volume of the boiler’s capacity and sealed finned electric heaters tightly in contact with the inner surface of the box-cases with their fins directly or through metal inserts of triangular section will allow:

create the necessary heat-transfer surface in terms of area by selecting the parameters of the cross-section of the box-cases, their length and quantity;

to ensure good heat transfer through the contacting metal parts of the heating elements and box-cases;

to simplify routine measures due to the lack of contact between the heating elements and the heated medium and the operation of extracting the heating elements from the box-cases in one or two steps.

Claims (2)

1. Electric heating boiler, containing a container, intake and return pipes, sealed finned thermoelectric heaters (TENy), temperature and level sensors, characterized in that metal containers are welded into the tank, sealed relative to its internal volume, into which canisters are open finned hermetically sealed heating elements are inserted so that they, with their finning, reliably contact the inner surface of the box-case. 2. The heating medium heating boiler according to claim 1, characterized in that metal inserts of a triangular shape in cross section are introduced along the entire length of their fins between the free inner surface of the box-case and the fins of two adjacent heating elements, ensuring reliable contact of the outer surfaces of the insert with the inner surface box-case and fins of two adjacent heating elements located nearby.

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