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THERMAL DEVICES, DEVICES FOR HEATING LIQUID MEDIA AND THEIR APPLICATION
INVENTION
Patent of the Russian Federation RU2270406

HEATER OF LIQUID OR GASEOUS MEDIA

The name of the inventor: Smirnov Yuri Alexandrovich (RU); Chistik Sergey Mikhailovich (RU); Parshin Sergey Nikolaevich (RU); Kiselev Sergey Vladimirovich (RU); Raikevich Alexander Iosifovich (RU)
The name of the patent owner: Kiselev Sergey Vladimirovich (RU); Parshin Sergey Nikolaevich (RU); Raikevich Alexander Iosifovich (RU)
Address for correspondence: 410012, Saratov, ul. Moscow, 155, SSU, PLO, O.I. Kupriyanovoy
Date of commencement of the patent: 2004.01.30

The invention relates to devices for heating gases or liquids, in particular to devices for low temperature heating, and can be used in various industries, for example in gas industry, for heating natural gas at the inlet of gas distribution stations in order to prevent the hydrate formation process. The object of the invention is to improve the efficiency of the device by increasing the heat exchange surface and maximizing the use of heat flow from the burner device. To solve the task in the liquid or gaseous media preheater, comprising a housing with a burner unit disposed therein, a duct for supplying air thereto, a heat exchange module including coaxially arranged inner and outer pipes, a burner tunnel, an inlet and outlet manifolds, a chimney, The heat exchange module comprises baffles disposed in the cavity between the inner and outer pipe forming channels in series communicating with each other, the cavity between the inner and outer pipe on opposite sides being muffled, the burner tunnel being located inside the heat exchange module, and the air supply passage Is formed by the outer tube of the heat exchange module and the side wall of the housing. The heat exchange module comprises at least two partitions oriented in the axial direction. The inlet and outlet manifolds are located on the side of the burner and are connected to the channels of the heat exchange module. Partitions of the heat exchange module are provided with holes for serial communication of channels. The heat exchange module contains an additional heat exchange element located in the cavity of the inner tube of the heat exchange module and connecting its channels. The heater comprises a slide located in the channel for supplying air near the burner device. The heat exchange module comprises fins for increasing the heat exchange surface located between the inner and outer tube and fixed to the surface of the inner tube. The walls of the shell are made with thermal insulation.

DESCRIPTION OF THE INVENTION

The invention relates to devices for heating gases or liquids, in particular to devices for low-temperature heating, and can be used in various industries, for example, in gas - for heating natural gas at the inlet of gas distribution stations in order to prevent the hydrate formation process.

A gas heater is known (RF patent No. 2061200, MPK F 27 B 5/00) containing radiant and convective chambers separated by a vertical saddle wall, tubular coils arranged in vertical rows in radiant and convection chambers, radiating burners. The saddle wall is installed in the gap between adjacent vertical rows of pipes of the radiant and convective chambers and is made of a heat-resistant material with high emissivity.

However, the effectiveness of this design is low due to uneven heating of pipes along the perimeter and length. In addition, the availability of a special means for removing condensation of water vapor reduces the reliability of the structure.

A gas heater (patent for invention of the Russian Federation No. 2140045, MPC F 24 H 3/00) containing a source of heating medium, a shell-and-tube heat exchanger with a radiation section shielded by heat-exchange tubes, equidistant with the inner wall of the casing, a chimney, collectors of the inlet and outlet of the heated Medium, an internal convective bundle of heat-exchanging tubes equidistant in radii, a coaxial radius of the screen tubes, all pipes being pipes inserted one into another, the external ones of which are made with a blind end facing the burner device, and at the other end, behind Outside the smoke box, the working cavities of each of the heat exchange tubes are connected by removable nozzles with toroidal collectors of the inlet and outlet of the heated medium.

However, the efficiency of this installation is low due to the likely formation of condensate in the smoke channel. The installation has a high metal consumption and considerable dimensions due to the uneven heating of pipes along the length and perimeter, it requires a large expenditure for the manufacture and use of expensive heat-resistant alloy and external heat-insulating material.

A gas heater is also known (RF patent No. 2168121, IPC F 24 H 3/08) comprising a burner, a chimney, collectors of the inlet and outlet of the heated medium, a heat exchange module in the form of pipes inserted one into the other, the external ones of which are made with a blind end , Facing the burner, and from the other end outside the smoke box, the cavities of each of the pipes are connected by two removable branch pipes with inlet and outlet manifolds. Throughout the length of the heat exchange module, an additional internal shielding tube belt is provided coaxial to the outer belt of the tubes, while the pipes in the radial direction of the heating medium motion are staggered.

A disadvantage of this design is the lack of efficiency due to the likely formation of condensate in the smoke channel. In addition, the plant has a high metal content, significant dimensions, and low efficiency.

The closest to the claimed one is the gas heater (RF-utility model No. 27194, MPK F 24 H 3/08), containing an annular burner, a chimney, inlet and outlet gas manifolds, a heat exchange module located in the housing and made in the form Coaxially located inner tube and external, muffled on the side of the burner, a cylindrical liner for separating the air and smoke flow, the inner and outer cylindrical shells forming the burner tunnel and located between the cylindrical liner and the heat exchange module in the lower part of the body.

The disadvantage of this design is the small surface of the heat sink in the high-temperature combustion zone and the poorly developed heat exchange surface of the heated medium, which significantly reduces the efficiency of the installation.

The object of the invention is to improve the efficiency of the device by increasing the heat exchange surface and maximizing the use of heat flow from the burner device.

The task is achieved by creating the best conditions for ensuring the maximum heat flow to the heated medium, and by creating a more developed heat removal surface from the combustion zone. This is ensured by the arrangement of the burner device inside the heat exchange module, the creation of channels in the heat exchange module, the introduction of an additional heat exchange element into the zone of maximum heat flow, and the presence of ribs in the annular space of the heat exchange module.

To solve the task in the liquid or gaseous media preheater, comprising a housing with a burner unit disposed therein, a duct for supplying air thereto, a heat exchange module including coaxially arranged inner and outer pipes, a burner tunnel, an inlet and outlet manifolds, a chimney, The heat exchange module comprises baffles disposed in the cavity between the inner and outer pipe forming channels in series communicating with each other, the cavity between the inner and outer pipe on opposite sides being muffled, the burner tunnel being located inside the heat exchange module, and the air supply passage Is formed by the outer tube of the heat exchange module and the side wall of the housing.

The heat exchange module comprises at least two partitions oriented in the axial direction.

The inlet and outlet manifolds are located on the side of the burner and are connected to the channels of the heat exchange module.

Partitions of the heat exchange module are provided with holes for serial communication of channels.

The heat exchange module contains an additional heat exchange element located in the cavity of the inner tube of the heat exchange module and connecting its channels.

The heater comprises a slide located in the channel for supplying air near the burner device.

The heat exchange module contains fins for increasing the heat exchange surface located between the inner and outer tube and fixed to the surface of the inner tube.

The walls of the shell are made with thermal insulation.

HEATER OF LIQUID OR GASEOUS MEDIA
HEATER OF LIQUID OR GASEOUS MEDIA

The essence of the proposed technical solution is explained in the drawings, where: FIG. 1 shows the claimed device (longitudinal section); 2, 3 - the claimed device (cross-section AA and BB, respectively); 4, 5 - an embodiment of a heater with an additional heat exchange element (longitudinal and transverse sections, respectively).

The positions in the drawings are: 1 - housing, 2 - burner, 3 - heat exchange module, 3 - inner tube, 4 - external pipe, 5, 6 - plugs, 7 - partitions, 8 - heat exchange module channels, 9 - burner tunnel, 10 - the channel for air supply, 11 - the gate, 12 - the inlet manifold, 13 - the outlet manifold, 14 - the chimney, 15 - the fins of the heat exchange module, 16 - the baffles in the baffles, 17 - the additional heat exchange element.

The heater includes: a housing, for example a cylindrical one, whose walls are made with heat insulation, in which the burner device 2 is located, a heat exchange module consisting of coaxially arranged internal 3 and outer 4 pipes in the annular space of which there are plugs 5 and 6 and partitions 7, A heating tunnel 9 located in the cavity of the inner tube 3 of the heat exchange module, a duct 10 for supplying air to the burner unit 2 formed by the side wall of the body 1 and the outer tube of the heat exchange module 4 in which co Side of the burner device, a gate 11 is located. The heater includes both inlet 12 and outlet 13 collectors oriented perpendicular to the heat exchange module and connected on the burner device 2 side to the channels of the heated medium 8. The heat exchange module is connected to the flue pipe 14. To increase the heat exchange area of ​​the heated The heat exchange module comprises ribs 15 disposed along the outer surface of the inner tube 3.

The serial communication of the flow channels of the heated medium in the heat exchange module can be performed either by means of openings 16 in the partitions 7 or by additional heat exchange elements 17 located in the cavity of the inner tube 3.

A heater, for example, a gas works as follows. The heated gas flows through the inlet manifold 12 into the annulus channels 8 between the inner 3 and outer 4 tubes of the heat exchange module. Having passed successively through all the channels communicating with each other by means of a hole 16 or by means of additional heat exchange elements 17, the heated gas enters the outlet manifold 13 and then into the piping (not shown in the drawings) and to the reduction to the gas distribution station or to the consumer.

Heating of the inner 3 and outer 4 tubes of the heat exchange module is carried out by the thermal radiation of the burner tunnel 9 of the burner 2, where the location of the burner inside the heat exchange module ensures its heating from the inside. In addition, the design provides for an increase in the length of the path passed by the flow of the heated medium during heat exchange due to the presence of several, for example, four partitions 7 forming heat exchange channels in the heat exchange module structure, an increase in the heat exchange area due to the presence of ribs 15, In the cavity of the inner tube 3 additional heat exchange elements 17, for example in the form of coils which are heated both by the radiation of the burner tunnel 9 and by the flow of combustion products moving from the burner 2 to the burner tunnel 9 and from the burner tunnel 9 to the chimney 14. Maintaining the required By the temperature mode technology is carried out by burning the fuel supplied to the burner 2. The fuel enters the burner tunnel 9 in which it mixes with the air coming through the channel formed by the inner surface of the heat-insulating wall of the shell 1 and the outer surface of the outer tube 4 of the heat exchange module. The amount of combustion air is regulated by a gate 11.

The proposed heater has, in comparison with the known analogs, greater capacity due to a more developed heat exchange surface. In addition, the claimed device more rationally uses the heat from the combustible fuel by heating the heat exchange module from the inside. The position of the gate next to the burner makes it easy to adjust the air flow rate to maintain the optimum combustion process.

CLAIM

1. Heater of liquid or gaseous media, comprising a housing with a burner unit disposed therein, a duct for supplying air thereto, a heat exchange module including coaxially arranged inner and outer pipes, a burner tunnel, an inlet and an outlet manifold, a smoke stack, characterized in that The heat exchange module comprises at least two baffles oriented in the axial direction located in the cavity between the inner and outer pipe forming channels in series communicating with each other, the cavity between the inner and outer pipe on opposite sides being muffled, the burner tunnel being placed Inside the heat exchange module, and the air supply channel is formed by the outer tube of the heat exchange module and the side wall of the housing.

2. A heater according to claim 1, characterized in that the inlet and outlet manifolds are located on the side of the burner device and are connected to the channels of the heat exchange module.

3. A heater according to claim 1, characterized in that the partitions of the heat exchange module are provided with apertures for sequentially communicating the channels.

4. A heater according to claim 1, characterized in that the heat exchange module comprises an additional heat exchange element disposed in the cavity of the inner tube of the heat exchange module and connecting its channels.

5. A heater according to claim 1, characterized in that it comprises a slide located in the channel for supplying air in the vicinity of the burner device.

6. A heater according to claim 1, characterized in that the heat exchange module comprises fins for increasing the heat exchange surface located between the inner and outer tube and fixed to the surface of the inner tube.

7. A heater according to claim 1, characterized in that the walls of the housing are made with heat insulation.

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Date of publication on December 21, 2006