Condensation heat exchanger

Abstract

The utility model belongs to the technical field of heat exchange equipment, and particularly relates to a condensation heat exchanger which comprises a shell with a heat exchange cavity, a smoke outlet and a smoke inlet are formed in the top and the bottom of the shell respectively, a smoke blocking partition plate is arranged in the heat exchange cavity, and a smoke passing channel is formed between the end of the smoke blocking partition plate and the inner bottom face of the heat exchange cavity. A plurality of heat absorption pipes are horizontally and transversely arranged in the heat exchange cavity located between the smoke inlet and the smoke blocking partition plate, the ends of the adjacent heat absorption pipes are communicated through a water passing channel and form a water flow channel of a snake-shaped structure, and a water inlet port and a water outlet port which are communicated with the head end and the tail end of the water flow channel respectively are formed in the shell. The flue gas heat exchanger is simple in structure, reasonable in design and high in heat exchange efficiency, the flue gas inlet and the flue gas outlet are vertically separated through the flue gas baffle, flue gas can be guided to flow downwards so as to slow down the flow rate, meanwhile, the flow path of the flue gas in the heat exchange cavity is prolonged, and sufficient heat exchange can be conducted between the heat absorption pipes and the flue gas.

Description

Technical field:

[0001] The utility model belongs to the technical field of heat exchange equipment, in particular to a condensing heat exchanger. Background technology:

[0002] Gas wall-mounted boilers are usually equipped with combustion chambers, heat exchangers and other corresponding devices. The combustion chamber burns gas to generate a large amount of heat, which is transferred to the cold water flowing through the heat exchanger from the water inlet pipe with the help of the heat exchanger, so that the water temperature of the cold water rises to form hot water discharged from the water outlet pipe; the high-temperature flue gas generated by the combustion will also pass through a set of flue gas secondary condensation heat exchangers, which will recover the heat in the flue gas to preheat the water flow, effectively improving the heat exchange rate of the gas wall-mounted boiler.

[0003] However, most existing secondary condensation heat exchangers directly arrange heat absorption tubes in the flue gas exhaust channel. However, due to the short flue gas channel and the fast flue gas flow rate, the heat in the flue gas cannot be effectively absorbed by the heat absorption tubes. Summary of the invention:

[0004] The purpose of the utility model is to provide a condensing heat exchanger, which uses a smoke barrier partition to separate the smoke inlet and the smoke outlet from top to bottom, which can not only guide the smoke to flow downward to slow down the flow rate, but also extend the flow path of the smoke in the heat exchange chamber, so that the heat absorption tube can fully exchange heat with the smoke.

[0005] The utility model is achieved in this way:

[0006] A condensing heat exchanger comprises a shell with a heat exchange chamber, wherein the top and bottom of the shell are respectively provided with a smoke outlet and a smoke inlet connected to the heat exchange chamber, and a smoke barrier partition is provided in the heat exchange chamber to separate the smoke outlet and the smoke inlet up and down, and the upper end of the smoke barrier partition is sealedly connected to the top of the heat exchange chamber, and the lower end and the inner bottom surface of the heat exchange chamber form a smoke passage for smoke to flow from the smoke inlet to the smoke outlet, and a plurality of heat absorption tubes are horizontally arranged in the heat exchange chamber between the smoke inlet and the smoke barrier partition, and the ends of adjacent heat absorption tubes are connected by a water passage to form a water flow channel with a serpentine structure, and the shell is provided with a water inlet port and a water outlet port respectively connected to the head and tail ends of the water flow channel.

[0007] In the above-mentioned condensing heat exchanger, the heat absorption tube is a corrugated tube and is arranged and distributed in the heat exchange chamber. The ends of two adjacent heat absorption tubes in the same row are connected by a bend pipe, and the inner hole of the bend pipe is the water passage. The heat absorption tubes in the upper and lower adjacent columns are staggered left and right.

[0008] In the above-mentioned condensing heat exchanger, the smoke barrier baffle has, from top to bottom, an inclined smoke guide portion, a transition corner portion, and a limiting portion arranged vertically. The inclined smoke guide portion and the transition corner portion are both inclined downward, and the inclination angle of the transition corner portion is greater than the inclination angle of the inclined smoke guide portion. The smoke passage is formed between the bottom of the limiting portion and the inner bottom surface of the heat exchange chamber, and the smoke outlet is opened directly above the inclined smoke guide portion.

[0009] In the above-mentioned condensing heat exchanger, the transition corner portion is provided with a plurality of smoke through holes along its width direction.

[0010] In the above-mentioned condensing heat exchanger, the upper cover of the heat exchange chamber located outside the flue gas inlet is provided with a smoke inlet hood cover that can separate the heat exchange chamber to the left and right. There is a smoke matching gap between the top of the smoke inlet hood cover and the smoke barrier baffle. The heat absorption tube is located on the side of the smoke inlet hood cover close to the smoke passage. A smoke storage chamber is formed between the other side of the smoke inlet hood cover and the heat exchange chamber. Several smoke inlet windows are opened on the side wall of the smoke inlet hood cover close to the smoke passage.

[0011] In the above-mentioned condensing heat exchanger, the inner bottom surface of the heat exchange chamber is in a funnel-shaped structure, and a drainage joint communicating with the outside is provided at the lowest point thereof.

[0012] The outstanding advantages of the utility model compared with the prior art are:

[0013] The utility model has a simple structure, reasonable design and high heat exchange efficiency. It adopts a smoke barrier partition to separate the smoke inlet and the smoke outlet from top to bottom, which not only guides the smoke to flow downward to slow down the flow rate, but also extends the flow path of the smoke in the heat exchange chamber, so that the heat absorption tube can fully exchange heat with the smoke. Description of the drawings:

[0014] Figure 1 It is an overall three-dimensional diagram of the utility model;

[0015] Figure 2 It is an overall sectional view of the present utility model.

[0016] In the figure: 1. Shell; 2. Smoke inlet; 3. Smoke outlet; 4. Smoke barrier; 5. Smoke passage; 6. Heat absorption pipe; 7. Water inlet port; 8. Water outlet port; 9. Elbow; 10. Inclined smoke guide portion; 11. Transition corner portion; 12. Limiting portion; 13. Smoke through hole; 14. Smoke inlet hood; 15. Smoke fitting gap; 16. Smoke inlet window; 17. Drainage joint. Specific implementation method:

[0017] The present invention is further described below with reference to specific embodiments. Figure 1 —2:

[0018] A condensing heat exchanger comprises a shell 1 having a heat exchange chamber, wherein the top and bottom of the shell 1 are respectively provided with a smoke outlet 3 and a smoke inlet 2 connected to the heat exchange chamber, a smoke barrier baffle 4 is provided in the heat exchange chamber to separate the smoke outlet 3 and the smoke inlet 2 up and down, and the upper end of the smoke barrier baffle 4 is sealedly connected to the top of the heat exchange chamber, and a smoke passage 5 is formed between the lower end and the inner bottom surface of the heat exchange chamber for the smoke to flow from the smoke inlet 2 to the smoke outlet 3, a plurality of heat absorption tubes 6 are horizontally arranged in the heat exchange chamber between the smoke inlet 2 and the smoke barrier baffle 4, and the ends of adjacent heat absorption tubes 6 are connected by a water passage to form a serpentine water flow channel, and the shell 1 is provided with a water inlet port 7 and a water outlet port 8 respectively connected to the head and tail ends of the water flow channel.

[0019] The utility model has a simple structure, reasonable design and high heat exchange efficiency. The smoke barrier 4 is used to separate the smoke inlet 2 and the smoke outlet 3 up and down, which not only guides the smoke to flow downward to slow down the flow rate, but also extends the flow path of the smoke in the heat exchange chamber, so that the heat absorption tube 6 can fully exchange heat with the smoke.

[0020] Among them, in order to enable the heat absorption tube 6 to effectively exchange heat with the flue gas, the heat absorption tube 6 is a corrugated tube and is arranged and distributed in the heat exchange chamber. The ends of two adjacent heat absorption tubes 6 in the same row are connected by a bend pipe 9, and the inner hole of the bend pipe 9 is the water passage. The heat absorption tubes 6 in the two adjacent columns above and below are staggered left and right.

[0021] At the same time, the smoke barrier baffle 4 can directly adopt an inclined plate structure. In the present embodiment, in order to optimize the spatial position of the smoke barrier baffle 4 in the heat exchange chamber so as to provide sufficient space for the heat absorption tube 6 to exchange heat with the flue gas, the specific structure adopted by the smoke barrier baffle 4 is as follows: the smoke barrier baffle 4 has an inclined smoke guide portion 10, a transition corner portion 11, and a limiting portion 12 arranged vertically from top to bottom. The inclined smoke guide portion 10 and the transition corner portion 11 are both inclined downward, and the inclination angle of the transition corner portion 11 is greater than the inclination angle of the inclined smoke guide portion 10. The smoke passage 5 is formed between the bottom of the limiting portion 12 and the inner bottom surface of the heat exchange chamber, and the smoke outlet 3 is opened directly above the inclined smoke guide portion 10.

[0022] In order to disrupt the flow of smoke and prevent the smoke from flowing steadily and at a high speed, the transition corner portion 11 is provided with a plurality of smoke through holes 13 along its width direction.

[0023] Furthermore, in order to allow the flue gas to accumulate in the heat exchange chamber and stay in the heat exchange chamber for a long time, the upper cover of the heat exchange chamber located outside the flue gas inlet 2 is provided with a smoke inlet cover 14 that can separate the heat exchange chamber to the left and right. There is a smoke fitting gap 15 between the top of the smoke inlet cover 14 and the smoke barrier baffle 4. The heat absorption tube 6 is located on the side of the smoke inlet cover 14 close to the smoke passage 5. A smoke storage chamber is formed between the other side of the smoke inlet cover 14 and the heat exchange chamber. Several smoke inlet windows 16 are opened on the side wall of the smoke inlet cover 14 close to the smoke passage 5.

[0024] In addition, the inner bottom surface of the heat exchange chamber is in a funnel-shaped structure, and a drainage joint 17 communicating with the outside is provided at the lowest point.

[0025] The above embodiment is only one of the preferred embodiments of the present invention and is not intended to limit the scope of implementation of the present invention. Therefore, any equivalent changes made based on the shape, structure, and principle of the present invention should be included in the scope of protection of the present invention.

Claims

1. A condensing heat exchanger, characterized in that: The invention comprises a shell (1) having a heat exchange chamber, wherein the top and bottom of the shell (1) are respectively provided with a smoke outlet (3) and a smoke inlet (2) connected to the heat exchange chamber, a smoke baffle (4) is provided in the heat exchange chamber for separating the smoke outlet (3) and the smoke inlet (2) up and down, and the upper end of the smoke baffle (4) is sealedly connected to the top of the heat exchange chamber, and the lower end and the inner bottom surface of the heat exchange chamber form a smoke passage (5) for smoke to flow from the smoke inlet (2) to the smoke outlet (3), and a plurality of heat absorption tubes (6) are horizontally arranged in the heat exchange chamber between the smoke inlet (2) and the smoke baffle (4), and the ends of adjacent heat absorption tubes (6) are connected through a water passage to form a water flow channel with a serpentine structure, and the shell (1) is provided with a water inlet port (7) and a water outlet port (8) respectively connected to the head and tail ends of the water flow channel.

2. A condensing heat exchanger according to claim 1, characterized in that: The heat absorbing tubes (6) are corrugated tubes and are arranged and distributed in the heat exchange chamber. The ends of two adjacent heat absorbing tubes (6) in the same row are connected through a bend tube (9), and the inner hole of the bend tube (9) is the water passage. The heat absorbing tubes (6) in the upper and lower adjacent rows are staggered left and right.

3. The condensing heat exchanger according to claim 1, characterized in that: The smoke barrier (4) comprises, from top to bottom, an inclined smoke guide portion (10), a transition corner portion (11), and a limiting portion (12) arranged vertically. The inclined smoke guide portion (10) and the transition corner portion (11) are both arranged to be inclined downward, and the inclination angle of the transition corner portion (11) is greater than the inclination angle of the inclined smoke guide portion (10). The smoke passage (5) is formed between the bottom of the limiting portion (12) and the inner bottom surface of the heat exchange chamber, and the smoke outlet (3) is opened directly above the inclined smoke guide portion (10).

4. The condensing heat exchanger according to claim 3, characterized in that: The transition corner portion (11) is provided with a plurality of smoke through holes (13) along its width direction.

5. The condensing heat exchanger according to claim 1, characterized in that: The upper cover of the heat exchange chamber located outside the smoke inlet (2) is provided with a smoke inlet cover (14) capable of dividing the heat exchange chamber into left and right parts. A smoke matching gap (15) is present between the top of the smoke inlet cover (14) and the smoke shielding baffle (4). The heat absorption pipe (6) is located on one side of the smoke inlet cover (14) close to the smoke passage (5). A smoke storage chamber is formed between the other side of the smoke inlet cover (14) and the heat exchange chamber. A plurality of smoke inlet windows (16) are provided on the side wall of the smoke inlet cover (14) close to the smoke passage (5).

6. The condensing heat exchanger according to claim 1, characterized in that: The inner bottom surface of the heat exchange chamber is in a funnel-shaped structure, and a drainage joint (17) communicating with the outside is provided at the lowest point.

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