CN2733293Y

CN2733293Y - Heat exchanger

Info

Publication number: CN2733293Y
Application number: CN 200420077958
Authority: CN
Inventors: 德英
Original assignee: Individual
Current assignee: Individual
Priority date: 2004-07-20
Filing date: 2004-07-20
Publication date: 2005-10-12
Anticipated expiration: 2014-07-20

Abstract

The utility model discloses a heat exchanger, comprising steel pipes, cyclones arranged in the steel pipes and heat transmission bodies arranged between the steel pipes. The airflow resistance loss of the cyclones of the heat exchanger is little, and the turbulent flow can be created to the air passing through the steel pipes. Thus, the lamellar flow is broken, the air scouring action is improved, and the heat transmission efficiency is raised. The heat transmission bodies outside the steel pipes can effectively increase the heat transmission area. Therefore, the heat transmission is realized between the steel pipes, the fume heat is full utilized for heating the steel pipes, and the heat exchange efficiency of the heat exchanger is raised.

Description

Heat exchanger

The utility model belongs to heat exchanger, particularly relates to the flue gas that a kind of heating furnace is used---air (coal gas) heat exchanger.

Present known heating furnace heat exchanger is rearranged by the steel pipe that is inserted with the fried dough twist part in the steel pipe, and air (coal gas) flows through in steel pipe, and flue gas of heating furnace flows through outside steel pipe, to realize flue gas and air (coal gas) heat exchange in the heating furnace.There is following shortcoming and defect in the heat exchanger of this form:

When 1, air (coal gas) flowed in steel pipe, though formed turbulent flow, the drag losses of inner air tube (coal gas) was bigger.

2, the outer gap of steel pipe can not realize between steel pipe before and after making that the heat conduction comes heat conduction, and heat exchange area is less, has reduced efficiency of heat exchanger.

3, heat exchanger windward side temperature height is difficult for realizing the heat conduction, so the easy scaling loss of the steel pipe of windward side.

The purpose of this utility model is: a kind of easier air (coal gas) laminar flow of breaking is provided, and heat exchange area strengthens, and the heat conduction is easy to realize that temperature difference is little between the steel pipe of heat exchanger front and back, the new type heat exchanger that heat exchange efficiency is high.

Above-mentioned purpose is obtained by following technical scheme: a kind of heat exchanger, comprise steel pipe, cyclone, space thermal conductor, in the steel pipe of heat exchanger, cyclone is installed, the space thermal conductor is installed outside the steel pipe of heat exchanger, the space thermal conductor is installed in the flue gas vertical passage of heat exchanger, be that the space thermal conductor is connected with steel pipe between the front and back steel pipe of heat exchanger, the space thermal conductor between steel pipe overlaps mutually.Usually space thermal conductor welding or be crimped on the outer wall of steel pipe on the flue gas flow direction, weld or be crimped on space thermal conductor between outer wall of steel pipe on flue gas flow direction before and after overlap joint.

The heat exchanger of this structure has the function of eddy flow and space heat transmission, cyclone in the steel pipe, make the air (coal gas) in the steel pipe of flowing through produce turbulent flow, broken laminar flow, strengthened the souring of air (coal gas), improved the heat exchanger effectiveness between air (coal gas) and tube wall greatly tube wall.The space thermal conductor that overlaps between the steel pipe of front and back, heat exchange area is strengthened, and the heat of flue gas can smooth and easyly carry out heat exchange by the space thermal conductor between steel pipe and steel pipe rapidly in heat exchanger, the thermal efficiency of heat exchanger is improved, all the interior steel pipes of heat exchanger and the temperature difference of whole spaces thermal conductor are reduced, prolonged the service life of heat exchanger, and can the invar pipe and the space thermal conductor owing to expand with heat and contract with cold, and heat exchanger is damaged.

The structure of above-mentioned cyclone is provided with multistage swirl vane for a metallic rod, and every grade of swirl vane is made up of at least one blade, wherein best results to be every grade be three uniform blades, and be installed in the steel pipe of heat exchanger.This version makes the gas rotation in the cyclone of flowing through, and produces turbulent flow, has broken laminar flow, and the gas resistance is decreased little.

The utility model is owing to be provided with cyclone in the steel pipe of heat exchanger in sum, make the air (coal gas) in the steel pipe of flowing through produce turbulent flow, the gas resistance is decreased little, has strengthened the souring of air (coal gas) to tube wall, has improved the heat exchanger effectiveness between air (coal gas) and tube wall greatly.The space thermal conductor that overlaps between the steel pipe of front and back makes all steel pipes and space thermal conductor in the heat exchanger become a well behaved heat conductor, and to the air heat in the steel pipe, has improved the heat exchange efficiency of heat exchanger; The steel pipe tube wall temperature difference in the heat exchanger is reduced, prolonged the service life of steel pipe; The heat exchanger volume can reduce, and has saved material, has reduced manufacturing cost.

Below in conjunction with accompanying drawing the utility model is described:

Fig. 1 is the front view of one of the utility model embodiment

Fig. 2 is the right view of Fig. 1 embodiment

Fig. 3 is the cutaway view of the cyclone of Fig. 1 embodiment

Fig. 4 is the partial enlarged drawing of Fig. 1 embodiment

Fig. 1, embodiment illustrated in fig. 2 in, heat exchanger comprises steel pipe (1), space thermal conductor (2), cyclone (3).(1) (air (coal gas) passage) installed cyclone (3) in the steel pipe of heat exchanger, in the exhaust gases passes (4) of heat exchanger, space thermal conductor (2) is installed between the front and back steel pipe of heat exchanger promptly.

Fig. 3 is the partial sectional view of Fig. 1 embodiment, among Fig. 3, in the heat exchanger steel pipe (1) of Fig. 1 cyclone (3) is installed, and it is made up of at least one blade, and multi-stage serial connection is installed in the steel pipe (1).Most typical structure is every grade to be made up of three blades (5), and multistage then being distributed on the metallic rod (6) can be equipped with the cyclone (3) of this structure in the every steel pipe of heat exchanger.Outside steel pipe, the front and back of every steel pipe are welded with a plurality of spaces thermal conductors (2) respectively, and the space thermal conductor (2) between steel pipe and steel pipe is overlap joint mutually; In the pipe of the gas of preheating through steel pipe (1), high-temperature flue gas after the burning in steel pipe (1) outside and with the flows outside of the space thermal conductor (2) of its overlap joint, make the gas that flows in outer high-temperature flue gas of steel pipe (1) and the steel pipe (1) carry out sufficient heat exchange, reach high heat-exchanging purpose.

Fig. 4 is the partial enlarged drawing of Fig. 1 embodiment, and among Fig. 4, the space thermal conductor (2) between the front and back steel pipe of heat exchanger is to overlap mutually, and the front and back of every steel pipe then are welded with a plurality of spaces thermal conductors (2) respectively.

Present embodiment under the effect of the cyclone (3) of flow air (coal gas) in steel pipe, forms turbulent flow in use in pipe, wash away the steel pipe tube wall, realizes the heat exchange between air (coal gas) and steel pipe; The flue gas that flows outside steel pipe passes steel pipe (1), the space thermal conductor (2) of vertical arrangement, carries out heat exchange with flow air (coal gas) in the pipe, has realized the space heat transfer, improved heat transfer efficiency, but moment is realized the heating to air (coal gas).Therefore fuel combustion generation heat is fully utilized, and thermal efficiency of heating furnace can significantly improve.

Claims

1, a kind of heat exchanger, comprise insert in steel pipe, the pipe, it is characterized in that: in the steel pipe of heat exchanger, cyclone is installed, the space thermal conductor is installed outside the steel pipe of heat exchanger, the space thermal conductor is installed in the flue gas vertical passage of heat exchanger, be that the space thermal conductor is connected with steel pipe between the front and back steel pipe of heat exchanger, the space thermal conductor between steel pipe overlaps mutually.

2, heat exchanger according to claim 1 is characterized in that: the structure of cyclone is provided with multistage swirl vane for a metallic rod, is made up of at least one blade for every grade, and is installed in the steel pipe of heat exchanger.

3, heat exchanger according to claim 2 is characterized in that: the blade of cyclone is three blades for every grade, and three blades of every grade are uniform.

4, heat exchanger according to claim 1 is characterized in that: space thermal conductor welding or be crimped on the outer wall of steel pipe on the flue gas flow direction, weld or be crimped on space thermal conductor between outer wall of steel pipe on flue gas flow direction before and after overlap joint.