CN201014753Y - condensing heat exchanger - Google Patents

Abstract

The utility model is a condensing heat exchanger, which is related to a heat exchange device of a gas burner and solves the problem of low thermal efficiency of the existing heat exchange device. There is a cylinder (13) formed by coiled or axially arranged heat-absorbing pipes (7) in the horizontal cylindrical shell (8). There is a gap between the outer wall of the cylinder (13) and the inner wall of the shell (8), and the heat-absorbing pipes ( The two ends of 7) are respectively connected with the water inlet joint (1) and the water outlet joint (2). There is a smoke outlet (9) on the shell (8) and a condensate outlet (12) on the bottom. Inside the cylinder (13) is A combustion chamber of a gas burner is arranged, and at least one end of the casing (8) has a burner installation hole (15).

Description

condensing heat exchanger

Technical field:

The utility model relates to a heat exchange device of a gas burner.

Background technique:

The heat exchange straight tubes of existing gas burners are arranged in one plane or in multiple parallel planes, the water in the straight tubes is directly heated by the fire head, and the smoke is discharged through the smoke exhaust port on the shell. The exhaust gas temperature is generally 160-250 °C, and the water vapor in the flue gas is still in a superheated state, unable to condense and release heat, and the heat is wasted with the flue gas discharge. At the same time, the high-temperature flue gas takes away a large amount of sensible heat, which together forms a large exhaust loss and reduces the thermal efficiency.

Contents of the utility model:

The purpose of the utility model is to provide a condensing heat exchanger with simple structure and high heat exchange efficiency.

The utility model is achieved in that:

In the utility model condensing heat exchanger, there is a cylinder body 13 formed by coiling or axially arranging the heat-absorbing tubes 7 in the horizontal cylindrical shell 8. There is a gap between the outer wall of the cylinder body 13 and the inner wall of the shell 8, and the heat-absorbing tube 7 The two ends are respectively connected with the water inlet joint 1 and the water outlet joint 2. There is a smoke exhaust port 9 on the shell 8, and a condensate water outlet 12 on the bottom. The cylinder body 13 is a combustion chamber with a gas burner. At least one end of the shell 8 has a combustion chamber. Device mounting hole 15.

The heat-absorbing pipes 7 are several straight pipes arranged in at least one layer along the axial direction and the inner wall of the housing 8 to form a cylinder 13, and the two ends of the cylinder 13 respectively pass through the bottoms of the front fixed plate 6 and the rear fixed plate 10 and are hermetically connected to them. , the front and rear fixing plates are ring-shaped, and their axial cross-sections are groove-shaped, and are respectively sealed and connected with the front cover plate 4 and the rear cover plate 11 to form the front and rear water chambers, which are separated by water barriers 5 in the front and rear water chambers It is a number of sub-water chambers, the front and rear water chambers are connected through the heat-absorbing pipe 7, one sub-water chamber of the front water chamber is connected with the water inlet joint 1, and the other sub-water chamber is connected with the water outlet joint 2, and the front cover 4 has a burner Mounting hole, rear cover plate 11 is a closed plate.

The cross section of the heat absorbing pipe 7 is oval or circular.

The heat-absorbing pipe 7 is a coiled pipe spirally coiled to form a cylinder 13. One end of the shell 8 is closed and a water outlet joint 2 communicates with the water outlet cavity 14. The water outlet cavity 14 communicates with one end of the heat-absorbing pipe 7, and the other end of the shell 8 Mounting hole 15 and water inlet cavity 14 are arranged, and water inlet cavity 16 communicates with water inlet joint 1 and the other end of heat-absorbing pipe 7, and several burner mounting screws 3 around the mounting hole 15.

The gap between the outer wall of the barrel 13 and the inner wall of the housing 8 is at least 10 mm.

The utility model has the advantages of simple structure, easy manufacture, convenient installation and use, low cost and high heat exchange efficiency.

The utility model uses the lower temperature water in the heat-absorbing pipe to cool the flue gas, so that the temperature of the flue gas is reduced, and the water vapor in the flue gas is condensed on the outer wall of the cylinder formed by the heat-absorbing pipe, and the condensed water is discharged through the condensed water discharge port to be cooled. The flue gas is discharged through the exhaust port to realize the release of the sensible heat of the flue gas and the release of the latent heat of water vapor condensation, while the water in the heat-absorbing pipe absorbs heat and is heated to realize heat energy recovery and improve the thermal efficiency of the boiler, which can increase the heat exchange rate by 8%. above. At the same time, the harmful gases such as CO and NOX in the flue gas are greatly reduced. Compared with the existing heat exchange tubes, the heat-absorbing tubes have improved thermal conductivity by more than 2 times.

Description of drawings:

Fig. 1 is a front view of the utility model.

Fig. 2 is a sectional view along line A-A of Fig. 1 .

Fig. 3 is a B-B sectional view of Fig. 1 .

Fig. 4 is the structural diagram of embodiment 1.

Fig. 5 is the structural diagram of embodiment 2.

FIG. 6 is one of the assembly structure diagrams of FIG. 5 .

FIG. 7 is the second assembly structure diagram of FIG. 5 .

Detailed ways:

Example 1:

The condensing heat exchanger for a wall-mounted boiler consists of a heat-absorbing tube 7 spirally coiled to form a heat-absorbing cylindrical cylinder 13. The two ends of the heat-absorbing tube are respectively connected to the water outlet cavity 14 and the water inlet cavity 16. The cavity 14 and the water inlet cavity 16 are located in the shell 8, and there is a gap of 10-20mm between the outer wall of the cylinder body 13 and the inner wall of the shell 8, and the water outlet joint 2 and the water inlet joint 1 are connected to the water outlet cavity 14 and the water inlet cavity 16 respectively. Connection, the casing has a burner installation hole 15, through which the burner is installed in the barrel 13, the upper end of the casing is connected to the smoke outlet 9, and the lower end is connected to the condensed water outlet 12.

Example 2:

Some straight heat-absorbing pipes 7 are arranged in one layer or two layers to form cylinder body 13, arranged into one layer of heat-absorbing pipes with elliptical cross-section, and two-layer heat-absorbing pipes with circular cross-section. The two ends of the cylinder body respectively pass through the bottom surfaces of the front fixed plate 6 and the rear fixed plate 10 to be welded thereto. The front and rear fixing plates are ring-shaped, and their axial cross-section is groove-shaped. They are respectively welded with the ring-shaped front cover plate 4 and the circular rear cover plate 11 to form the front and rear water chambers. There are four water baffles 5 in the front water chamber. It is divided into four sub-water chambers, one of which communicates with the water inlet joint 1, and the other communicates with the water outlet joint 2. The hole in the middle of the front cover plate 4 is a mounting hole 15, and 6 burner mounting screws 3 are evenly distributed on its periphery. There are three baffles 5 in the back water chamber to separate it into 3 sub-water chambers. There is a smoke outlet 9 on the shell 8 and a condensed water outlet 12 on the bottom.

Compared with Example 1, this example is easier to manufacture, convenient to install and use, lower in cost, and higher in heat exchange efficiency.

Claims (5)

1. condensed heat exchanger, it is characterized in that having in the horizontal cylindrical outer casing (8) cylindrical shell (13) of endothermic tube (7) coiling or axially-aligned formation, the inwall of the outer wall of cylindrical shell (13) and shell (8) is gapped, the two ends of endothermic tube (7) are connected with water out adapter (2) with water supply connector (1) respectively, exhaust opening (9) is arranged on the shell (8), under condensation-water drain (12) is arranged, for the combustion chamber of gas burner is set, at least one end of shell (8) has burner installing hole (15) in the cylindrical shell (13).

2. condensed heat exchanger according to claim 1, it is characterized in that endothermic tube (7) is some straight tubes, along shell (8) axially and inwall be arranged in one deck formation cylindrical shell (13) at least, the bottom that the two ends of cylindrical shell (13) are passed preceding fixed disk (6) and back fixed disk (10) respectively is tightly connected with it, before, rear fixed plate is an annular, its axial cross section is a flute profile, respectively with front shroud (4) with before back shroud (11) is tightly connected, back hydroecium, before, there is water-stop sheet (5) that it is divided into the plurality of sub hydroecium in the back hydroecium, the front and back hydroecium is communicated with by endothermic tube (7), a sub-hydroecium of front water chamber is communicated with water supply connector (1), another sub-hydroecium is communicated with water out adapter (2), front shroud has the burner installing hole on (4), and back shroud (11) is a closure plate.

3. condensed heat exchanger according to claim 1, the cross section that it is characterized in that endothermic tube (7) is for oval or circular.

4. condensed heat exchanger according to claim 1, it is characterized in that endothermic tube (7) is that a coil pipe coiled coil constitutes cylindrical shell (13), shell (8) one ends seal and have water out adapter (2) to be communicated with water outlet cavity (14), water outlet cavity (14) is communicated with an end of endothermic tube (7), the other end of shell (8) has installing hole (15) and water inlet cavity (14), water inlet cavity (16) is communicated with the some burner mounting screws of installing hole (15) (3) all around with the water supply connector (1) and endothermic tube (7) other end.

5. condensed heat exchanger according to claim 1 is characterized in that the gap between the inwall of the outer wall of cylindrical shell (13) and shell (8) is at least 10mm.

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