CN212006214U

CN212006214U - Tubular heating furnace

Info

Publication number: CN212006214U
Application number: CN202020273314.XU
Authority: CN
Inventors: 陈广强; 吕静; 苏崇传
Original assignee: Beijing Bright Petroleum Technology Co ltd
Current assignee: Beijing Bright Petroleum Technology Co ltd
Priority date: 2020-03-06
Filing date: 2020-03-06
Publication date: 2020-11-24
Anticipated expiration: 2030-03-06

Abstract

The utility model discloses a tubular heating furnace, which comprises an airtight furnace body in an anaerobic state, wherein the furnace body comprises a convection furnace body and a radiation furnace body, and the convection furnace body comprises a heat exchange device and a fire-resistant heat insulation device; the radiant furnace body comprises a radiation cone; the heat exchange device is composed of a heating coil which is arranged in flame and smoke, and two ends of the heating coil extend out of the furnace body; the refractory heat insulation device consists of a casting lining and refractory fibers, and the casting lining and the refractory fibers are fixed in the furnace body protection plate; the radiation cone is composed of a supporting steel frame and a pouring lining, the pouring lining is fixed on the inner side and the outer side of the supporting frame, and the supporting frame is welded on the rear side of the furnace. The utility model discloses radiation heating surface and convection heating surface elbow are all protected, do not directly contact with flame or high temperature flue gas, do not have the overburning, swell the phenomenon, have reduced thermal stress, and the radiation awl increases the smoke velocity of radiation chamber afterbody heating surface part flue gas, improves radiation and convection heat transfer volume, has improved heating efficiency, has prolonged the life of furnace body.

Description

Tubular heating furnace

Technical Field

The utility model relates to a special firing equipment of oil gas field, especially a arrange the tubular heating furnace of furnace body heat exchange tube in flame and flue gas.

Background

With continuous exploitation of oil fields, the gas consumption per ton also increases greatly, and energy waste and environmental pollution caused by heating furnaces, such as incomplete combustion of fuel, heat dissipation loss and the like, become problems that cannot be ignored in the whole oil field, so that the energy conservation and consumption reduction strength must be increased. The pipe-type heating furnace and the popularization and application of the technology thereof effectively solve the problem, and the furnace becomes an ideal replacement product of the traditional heating furnace of the oil field at present due to the advantages of low manufacturing cost, low energy consumption, high efficiency, high automation degree and the like. However, when the existing tubular heating furnace is in operation, the furnace tube can generate phenomena of coking, overburning, bulging, tube explosion, low-temperature corrosion and the like, so frequent maintenance is required, and the working efficiency is reduced.

SUMMERY OF THE UTILITY MODEL

The utility model aims at overcoming the defects of coking, overburning, bulging, pipe bursting and low-temperature corrosion of the existing pipe-type heating furnace, and inventing a pipe-type heating furnace which is provided with a heating coil in the heating furnace and exchanges heat in the furnace body through flame and smoke in the furnace and a heated medium in the coil.

The purpose of the utility model is realized through the following technical scheme:

a tube-type heating furnace comprises a closed furnace body in an oxygen-free state, wherein the furnace body comprises a convection furnace body and a radiation furnace body, and the convection furnace body comprises a heat exchange device and a fire-resistant heat insulation device; the radiant furnace body comprises a radiation cone;

the heat exchange device is composed of a heating coil which is arranged in flame and smoke, and two ends of the heating coil extend out of the furnace body; the refractory heat insulation device consists of a casting lining and refractory fibers, and the casting lining and the refractory fibers are fixed in the furnace body protection plate; the radiation cone is composed of a supporting steel frame and a pouring lining, the pouring lining is fixed on the inner side and the outer side of the supporting frame, and the supporting frame is welded on the rear side of the furnace.

Further, the radiation cone is conical and is arranged along the direction of the flue gas flow.

Furthermore, the part of the smoke box of the furnace body extending out of the outer side of the furnace body is provided with an explosion-proof device, and the explosion-proof device is used for automatically exhausting and releasing pressure through an explosion-proof door of the explosion-proof device when deflagration occurs, so that the combustion device is prevented from being damaged.

Furthermore, the upper end of the furnace body is provided with a connecting hole for connecting an external device and symmetrical lifting lugs.

Furthermore, symmetrical supporting devices are welded at the lower end of the furnace body.

The utility model discloses an actively the effect as follows: because the utility model works in a closed environment, the heating mode is a direct fire type, the heating temperature is high, the heat transfer capacity is large, and the medium temperature rise is fast; because the furnace body elbow is not heated, the radiation heating surface and the convection heating surface elbow are protected and are not directly contacted with flame or high-temperature flue gas, the thermal stress is greatly reduced, the reliability of the furnace is improved, and the phenomena of overburning, bulging and the like can not occur; the radiation part sets up the radiation cone, and the radiation cone is conical, sets up along with the direction that the flue gas flows, thereby along with the reduction radiation cone of flue gas temperature occupies the increase of volume gradually increases the flue gas velocity of flow like this, and then increases the convection heat transfer coefficient, also along with the increase of volume external surface area and then increase the radiation heat transfer area along with the increase to improve the radiation heat transfer volume, the increase of radiation cone improves radiation and convection heat transfer volume. The utility model has high heating efficiency and long service life; the utility model discloses use oil and natural gas as fuel, be equipped with advanced full-automatic combustor, sturdy and durable, degree of automation is high, the good reliability.

Drawings

The accompanying drawings are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention, and together with the description serve to explain the invention and not to limit the invention. In the drawings:

FIG. 1 is a structural view of a radiant furnace body of the present invention;

FIG. 2 is a structural view of the convection furnace body of the present invention;

FIG. 3 is a view of the structure from A-A in FIG. 1;

fig. 4 is a view showing the structure from B-B in fig. 2.

In the figure: 1, a furnace body; 2 heating the coil; 3 a refractory and heat-insulating device; 4, an explosion-proof device; 5, connecting holes; 6, lifting lugs; 7 supporting means; 8 radiation cone.

Detailed Description

It should be noted at the outset that the examples of the present invention disclose only preferred embodiments, and should not be construed as limiting the practice of the invention, which is limited only by the disclosure of the claims.

As shown in fig. 1-4, the embodiment of the utility model discloses a tubular heating furnace, which comprises a closed furnace body 1 in an oxygen-free state, wherein the furnace body comprises a convection furnace body and a radiation furnace body, and the convection furnace body comprises a heat exchange device and a fire-resistant heat insulation device; the radiant furnace body comprises a radiation cone;

the heat exchange device is composed of a heating coil 2, the heating coil is arranged in flame and smoke, and two ends of the heating coil extend out of the furnace body; the refractory heat insulation device 3 consists of a casting lining and refractory fibers, and the casting lining and the refractory fibers are fixed in the furnace body protection plate; the radiation cone 8 is composed of a support steel frame and a casting lining, the casting lining is fixed on the inner side and the outer side of the support frame, and the support frame is welded on the rear side of the furnace.

The radiation cone 8 is conical and is arranged with the direction of the flue gas flow.

The part of the smoke box of the furnace body 1 extending out of the outer side of the furnace body is provided with an explosion-proof device 4, and the explosion-proof device is used for automatically exhausting and releasing pressure through an explosion-proof door of the explosion-proof device when deflagration occurs, so that the combustion device is prevented from being damaged.

The upper end of the furnace body is provided with a connecting hole 5 for connecting an external device and symmetrical lifting lugs 6.

And symmetrical supporting devices 7 are welded at the lower end of the furnace body.

The utility model relates to a direct heating tube type heating furnace, which is formed by arranging a heating coil in the flame and smoke space in a furnace body. The utility model discloses at the during operation, fuel gets into convection furnace body after the burning in the radiant furnace body, discharge into the atmosphere through the chimney at last, the flue gas is exothermic at the radiant furnace body radiation at this in-process, the radiation part sets up the radiation cone, the radiation cone is conical, direction setting along with the flue gas flows, thereby the increase that occupies the volume along with the reduction radiation cone of flue gas temperature increases the flue gas velocity gradually like this, and then increase the convection heat transfer coefficient, also along with the increase of volume external surface area along with the increase and then increase the radiant heat transfer area, thereby improve the radiant heat transfer volume, the increase of radiation cone improves radiation and convection heat transfer volume. Heat is convectively released in the convection furnace body, so that the heated medium in the heating coil is heated and then is supplied to a user for use. The heated medium of the pipe-type heating furnace can be water, crude oil and natural gas, which is just suitable for the oil field condition and meets the requirement of various changes of the heated medium.

Finally, it should be pointed out that any unit or person using or implementing the technical solution of the present invention is an infringement of the present invention, and that any unit or person, without the permission of the applicant, cannot implement the present patent alone. And any unit or individual motivated by, or susceptible to, the present invention when embodied in a simple, convenient or practical manner, is also to be considered as part of the present patent.

Claims

1. A tube-type heating furnace is characterized by comprising a closed furnace body in an oxygen-free state, wherein the furnace body comprises a convection furnace body and a radiation furnace body, and the convection furnace body comprises a heat exchange device and a fire-resistant heat insulation device; the radiant furnace body comprises a radiation cone;

2. The tube furnace of claim 1, wherein the radiation cone is conical and is disposed with the direction of the flue gas flow.

3. The tube furnace according to claim 1, wherein the portion of the smoke box of the furnace body which extends outside the furnace body is provided with an explosion-proof device for automatically exhausting and releasing pressure through an explosion-proof door of the explosion-proof device when explosion occurs, thereby preventing the combustion device from being damaged.

4. The tube furnace according to claim 1, wherein the upper end of the furnace body is provided with a connecting hole for connecting an external device and symmetrical lifting lugs.

5. The tube furnace according to claim 1, wherein the lower end of the furnace body is welded with symmetrical support means.