CN2383974Y - Ring fume duct type heating stove - Google Patents

Abstract

This utility model relates to an annular flue gas flow channel tubular heater for oil extraction and gathering, comprising a metal shell 3, a burner 1, a chimney 7, an explosion-proof door 8, a lining 9, a drain pipe 11, and a fire basin 10, radiant furnace tubes 2, convection furnace tubes 5 and 6, and a convection plug 4 installed inside the shell 3. In this type of heater, the convection furnace tubes and radiant furnace tubes are integrated, eliminating the need for elbow connections, thus simplifying the structure, facilitating manufacturing, and promoting energy conservation, consumption reduction, and lower production costs. The annular flue gas flow channel formed between the furnace body and the convection plug increases the convective heat transfer area and improves furnace efficiency.

Description

Annular flue gas channel tubular heating furnace

The utility model relates to a heating device used in the process of oil exploitation and gathering and transportation: an annular flue gas flow channel tubular heating furnace.

The heating furnace is an essential and important equipment in the process of oil exploitation, gathering and transportation. At present, the heating furnaces used on site include water jacket furnaces, heat pipe furnaces and other structural types, among which the tubular heating furnace is a relatively new type in the past 10 years. The tube heating furnace in the prior art uses the flame and high-temperature flue gas formed after fuel combustion to directly heat the medium flowing in the furnace tube. The furnace tube is generally divided into two sections: a radiation section and a convection section. The structure of the convection section furnace tube Most of them are rectangular, and its disadvantages are that there are many bends in the furnace tube, and the local resistance of the medium flow is large; the second is that the welding workload of the elbow is large, the number of non-destructive testing is large, the difficulty is high, and the cost is high; the third is that it is cylindrical. The structure of the convective section where the radiation section transitions to the rectangular body is complicated, the steel consumption is large, and the manufacturing cost is high. Due to the existence of the above disadvantages, the application range of the existing tubular heating furnace is limited, and the economic benefits are affected.

The purpose of the utility model is to provide a tubular heating furnace with a relatively simple structure, easy manufacture, less steel consumption and lower manufacturing cost.

The utility model is achieved in this way. The convection section and radiation section of this tube heating furnace are both made into spiral shapes, and the convection furnace tube is the continuation of the radiation furnace tube. In order to strengthen the convection heat transfer and increase the flue gas flow rate, a heat-resistant and heat-insulating cylindrical convection plug is added in the central cavity surrounded by the spiral tube. In this case, the flame and high-temperature flue gas formed by the combustion of the fuel through the burner pass through the cavity of the furnace body outside the radiation furnace tube, flow through the annular channel formed by the lining of the furnace body and the convection plug, and after laterally washing the convection furnace tube, The flue gas enters the chimney through the upper part of the convection plug and is discharged into the atmosphere, thereby increasing the convective heat transfer area and improving the furnace efficiency.

The utility model has the advantages that the convection furnace tube and the radiation furnace tube are integrally formed without using an elbow to connect, so the structure is simple, the steel consumption is small, the fabrication is easy, and the welding seam is few, and the cost of manufacture and non-destructive testing is low. At the same time, since there is no need to use an elbow connection, the flow resistance of the medium is small, and the energy consumption of the delivery pump is reduced, which is beneficial to energy saving and consumption reduction and production cost reduction. In addition, the annular flue gas flow channel between the furnace body and the convection plug can increase the convective heat transfer area and improve the furnace efficiency.

Accompanying drawing is the overall structural representation of the utility model.

Provide embodiments of the present utility model below in conjunction with accompanying drawing.

As shown in the figure, the utility model consists of a burner 1, a radiation furnace tube 2, a metal shell 3, a convection plug 4, a convection furnace tube 5, 6, a chimney 7, an explosion-proof door 8, a lining 9, a brazier 10 and a sewage pipe 11 compositions. Its structure and assembly features are as follows: the inner wall of the metal shell 3 is provided with a lining 9, the top is equipped with a chimney 7, the upper side is provided with an explosion-proof door 8, the lower part is provided with a burner 1, and a sewage pipe 11 is connected; A brazier 10 is provided at the bottom, and a radiation furnace tube 2 is installed on the upper seat, and a convection plug 4 is provided in the central cavity above the radiation furnace tube 2, and a convection furnace tube 5 connected to the upper part of the radiation furnace tube is arranged around it. 6. Wherein, the metal shell 3 is a vertical or horizontal hollow cylinder, and its top, side walls and bottom are respectively provided with round holes for installing the chimney 7, the explosion-proof door 8, the burner 1 and the sewage pipe 11. The convection plug 4 is cylindrical and made of refractory cement shell filled with heat-insulating materials such as aluminum silicate and rock wool. There are a number of small holes for flue gas circulation on the upper part. The radiation furnace tube 2 is spiral, and the convection furnace tubes 5 and 6 which can be used for circulation and heating of two different media are respectively connected to the upper part. The radiation furnace tube and the convection furnace tube are both made of petroleum cracking tubes or boiler tubes. Liner 9 adopts heat-resistant and heat-insulating material rock wool and aluminum silicate fiber bonding to make. Other parts (burner 1, chimney 7, explosion-proof door 8, brazier 10, blowdown pipe 11) are all common parts.

Claims (2)

1. An annular flue gas duct tubular heating furnace, consisting of a burner (1), a radiation furnace tube (2), a metal shell (3), a convection plug (4), a convection furnace tube (5), ( 6), chimney (7), explosion-proof door (8), lining (9), brazier (10) and sewage pipe (11), characterized in that: the inner wall of the metal shell (3) is provided with a lining (9), the top A chimney (7) is installed, an explosion-proof door (8) is provided on one side of the upper part, a burner (1) is provided on the lower part, and a sewage pipe (11) is connected to it; the inner bottom of the housing (3) is provided with a brazier (10), The upper seat is equipped with a radiation furnace tube (2), and a convection plug (4) is arranged in the central cavity above the radiation furnace tube (2), and convection furnace tubes (4) which are respectively connected to the upper part of the radiation furnace tube ( 5), (6). 2. The tubular heating furnace with annular flue gas flow channel according to claim 1 is characterized in that the convection plug (4) is cylindrical and made of refractory cement shell filled with heat insulating materials such as aluminum silicate and rock wool, and its upper part There are many small holes.

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