Multi-return-stroke heat exchanger

Abstract

The utility model relates to the technical field of heat exchangers, and discloses a multi-return-stroke heat exchanger which comprises a shell, the right end of the shell is connected with a first condensation part heat exchange pipe through an input assembly, the left end of the first condensation part heat exchange pipe is fixedly connected with a second condensation part conversion box, and a second condensation part heat exchange pipe is arranged at the right end of the second condensation part conversion box in a penetrating mode. A first condensation part conversion box is fixedly connected to the right end of the second condensation part heat exchange pipe, a third condensation part heat exchange pipe is arranged at the left end of the first condensation part conversion box in a penetrating mode, a third condensation part conversion box is fixedly connected to the left end of the third condensation part heat exchange pipe, and a second main furnace body heat exchange pipe is arranged at the right end of the third condensation part conversion box in a penetrating mode. According to the boiler, the water flow direction is opposite to the smoke flow direction, the heat exchange efficiency can be improved, heat exchange of three return strokes is carried out on the condenser part, heat exchange of two return strokes is carried out in the main boiler body, and heat exchange of multiple return strokes is carried out, so that the heat exchange efficiency is further improved.

Description

Technical Field

[0001] The utility model relates to the technical field of heat exchangers, in particular to a multi-return heat exchanger. Background Art

[0002] A heat exchanger is a device that transfers part of the heat of a hot fluid to a cold fluid. It is also called a heat exchanger. Heat exchangers play an important role in chemical, petroleum, power, food and many other industrial production. They are often used to heat low-temperature fluids or cool high-temperature fluids, vaporize liquids into steam or condense steam into liquids. In chemical production, heat exchangers can be widely used as heaters, coolers, condensers, evaporators and reboilers.

[0003] After searching, a multi-pass flue gas heat exchanger with announcement number CN212692606U is found, which includes a first body, wherein the outer wall of the first body is movably connected to a head, the outer wall of the head is fixedly connected to a water inlet pipe, the inner wall of the first body is fixedly connected to a tube sheet, one side of the tube sheet is provided with a tube hole, the inner wall of the tube hole is fixedly connected to a first water pipe, the outer wall of the first body is fixedly connected to an exhaust pipe, the outer wall of the exhaust pipe is movably connected to an elbow, and the outer wall of the elbow is movably connected to a connecting ring. This multi-pass flue gas heat exchanger achieves the purpose of good heat exchange effect and solves the problem of poor heat exchange effect of general multi-pass heat exchangers. The good heat exchange effect makes full use of the waste heat energy of the flue gas, greatly improves the heat exchange efficiency of the multi-pass heat exchanger, thereby reducing the loss of heat energy in the factory, reducing the emission of high-temperature gas to a certain extent, and thereby reducing the emission of carbon-containing flue gas, thereby alleviating air pollution.

[0004] Based on the above patent, the multi-pass heat exchangers on the market mentioned in its background technology generally have the problem of poor heat exchange effect. The poor heat exchange effect leads to the inability to fully utilize the waste heat of the flue gas, which greatly reduces the heat exchange efficiency of the multi-pass heat exchanger and increases the heat loss of the factory. In this regard, to address this technical problem, this application proposes a multi-pass heat exchanger. Utility Model Content

[0005] The purpose of the present utility model is to solve the shortcomings of the prior art and to propose a multi-return heat exchanger, which makes the water flow direction opposite to the flue gas flow direction, thereby improving the heat exchange efficiency, and performs three-return heat exchange in the condenser part and two-return heat exchange in the main furnace body. Multiple return heat exchanges further improve the heat exchange efficiency.

[0006] To achieve the above objectives, the present invention provides the following technical solutions:

[0007] A multi-return heat exchanger comprises a shell, wherein the right end of the shell is connected to a condensation section heat exchange tube 1 through an input component, the left end of the condensation section heat exchange tube 1 is fixedly connected to a condensation section conversion box 2, the right end of the condensation section conversion box 2 is penetrated by a condensation section heat exchange tube 2, the right end of the condensation section heat exchange tube 2 is fixedly connected to the condensation section conversion box 1, the left end of the condensation section conversion box 1 is penetrated by a condensation section heat exchange tube 3, the left end of the condensation section heat exchange tube 3 is fixedly connected to the condensation section conversion box 3, the right end of the condensation section conversion box 3 is penetrated by a main furnace body heat exchange tube 2, the right end of the main furnace body heat exchange tube 2 is fixedly connected to the main furnace body conversion box 2, the left end of the main furnace body conversion box 2 is penetrated by the main furnace body heat exchange tube 1, the left end of the main furnace body conversion box 2 is penetrated by the main furnace body heat exchange tube 1, the left end of the main furnace body heat exchange tube 1 is fixedly connected to the main furnace body conversion box 1, the right end of the main furnace body conversion box 1 is connected to a water outlet pipe through an output component, the inner wall of the shell is fixedly connected to a burner, and the right end of the shell is penetrated by a smoke outlet.

[0008] Furthermore, the input component includes a water inlet pipe passing through the right end of the shell, the left end of the water inlet pipe is fixedly connected to the temporary storage box 2, and the right end of the condensation part heat exchange tube 1 is passed through the left end of the temporary storage box 2.

[0009] Furthermore, the output component includes a connecting pipe passing through the right end of the main furnace body conversion box 1, the right end of the connecting pipe is fixedly connected to the temporary storage box 1, and the left end of the water outlet pipe passes through the right end of the temporary storage box 1.

[0010] Furthermore, the outer wall of the second condensation section conversion box is arranged on the inner wall of the shell, the outer wall of the third condensation section conversion box is arranged on the inner wall of the shell, and the rear end of the second condensation section conversion box is arranged at the front end of the third condensation section conversion box.

[0011] Furthermore, the outer wall of the condensation section conversion box 1 is arranged on the inner wall of the shell, the outer wall of the main furnace body conversion box 2 is arranged on the inner wall of the shell, and the front end of the main furnace body conversion box 2 is arranged on the rear end of the condensation section conversion box 1.

[0012] Furthermore, an outer wall of the main furnace body conversion box is arranged on the inner wall of the shell.

[0013] Furthermore, the second outer wall of the temporary storage box is arranged on the inner wall of the shell, and the rear end of the second temporary storage box is arranged at the front end of the first condensation part conversion box.

[0014] Furthermore, the outer wall of the temporary storage box 1 is arranged on the inner wall of the shell, the front end of the temporary storage box 1 is arranged at the rear end of the main furnace body conversion box 2, and the outer wall of the water outlet pipe is arranged on the inner wall of the shell.

[0015] The utility model has the following beneficial effects:

[0016] 1. In the present invention, the water flow direction is opposite to the flue gas flow direction through the cooperation of the water inlet pipe, the water outlet pipe and the burner, which can improve the heat exchange efficiency. In addition, three return heat exchanges are carried out in the condenser part and two return heat exchanges are carried out in the main furnace body. Multiple return heat exchanges further improve the heat exchange efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a three-dimensional diagram of a multi-return heat exchanger proposed by the present utility model;

[0018] Figure 2 This is a cross-sectional view of the shell of a multi-return heat exchanger proposed in this utility model Figure 1 ;

[0019] Figure 3 This is a cross-sectional view of the shell of a multi-return heat exchanger proposed in this utility model Figure 2 .

[0020] Legend:

[0021] 1. Shell; 2. Smoke outlet; 3. Water inlet pipe; 4. Water outlet pipe; 5. Burner; 6. Main furnace body conversion box 1; 7. Main furnace body heat exchange tube 1; 8. Connecting pipe; 9. Temporary storage box 1; 10. Main furnace body conversion box 2; 11. Main furnace body heat exchange tube 2; 12. Condensation section conversion box 1; 13. Temporary storage box 2; 14. Condensation section heat exchange tube 1; 15. Condensation section heat exchange tube 2; 16. Condensation section heat exchange tube 3; 17. Condensation section conversion box 2; 18. Condensation section conversion box 3. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0023] Reference Figure 1-3The utility model provides an embodiment: a multi-return heat exchanger, including a shell 1, a water inlet pipe 3 is passed through the right end of the shell 1, the left end of the water inlet pipe 3 is fixedly connected to a temporary storage box 2 13, the outer wall of the temporary storage box 2 13 is arranged on the inner wall of the shell 1, the rear end of the temporary storage box 2 13 is arranged at the front end of the condensation part conversion box 1 12, the right end of the condensation part heat exchange pipe 1 14 is passed through the left end of the temporary storage box 2 13, the left end of the condensation part heat exchange pipe 1 14 is fixedly connected to the condensation part conversion box 2 17, the condensation part conversion box 2 The outer wall of 17 is arranged on the inner wall of the shell 1, the outer wall of the condensation part conversion box 3 18 is arranged on the inner wall of the shell 1, the rear end of the condensation part conversion box 2 17 is arranged on the front end of the condensation part conversion box 3 18, the right end of the condensation part conversion box 2 17 is penetrated by the condensation part heat exchange pipe 2 15, the right end of the condensation part heat exchange pipe 2 15 is fixedly connected to the condensation part conversion box 1 12, the outer wall of the condensation part conversion box 1 12 is arranged on the inner wall of the shell 1, the outer wall of the main furnace body conversion box 2 10 is arranged on the inner wall of the shell 1, the main furnace body conversion box 2 10 The front end is arranged at the rear end of the condensation part conversion box 12, the left end of the condensation part conversion box 12 is penetrated by the condensation part heat exchange pipe 3 16, the left end of the condensation part heat exchange pipe 3 16 is fixedly connected to the condensation part conversion box 3 18, the right end of the condensation part conversion box 3 18 is penetrated by the main furnace body heat exchange pipe 2 11, the right end of the main furnace body heat exchange pipe 2 11 is fixedly connected to the main furnace body conversion box 2 10, the left end of the main furnace body conversion box 2 10 is penetrated by the main furnace body heat exchange pipe 1 7, the left end of the main furnace body heat exchange pipe 1 7 is fixedly connected to the main furnace body Conversion box 6, the outer wall of the main furnace body conversion box 6 is arranged on the inner wall of the shell 1, the right end of the main furnace body conversion box 6 is penetrated by a connecting pipe 8, the right end of the connecting pipe 8 is fixedly connected to a temporary storage box 9, the left end of the water outlet pipe 4 is penetrated by the right end of the temporary storage box 9, the outer wall of the temporary storage box 9 is arranged on the inner wall of the shell 1, the front end of the temporary storage box 9 is arranged on the rear end of the main furnace body conversion box 2 10, the outer wall of the water outlet pipe 4 is arranged on the inner wall of the shell 1, the inner wall of the shell 1 is fixedly connected to the burner 5, and the right end of the shell 1 is penetrated by a smoke outlet 2.

[0024] Specifically, after the gas is burned inside the burner 5, high-temperature flue gas is generated. The high-temperature flue gas exchanges heat with the main furnace body heat exchange tube 1 7 and the main furnace body heat exchange tube 2 11 and moves toward the smoke outlet 2. Cold water enters the temporary storage box 2 13 through the water inlet pipe 3, and then enters the condensation section conversion box 2 17 through the condensation section heat exchange tube 1 14, enters the condensation section conversion box 1 12 from the condensation section conversion box 2 through the condensation section heat exchange tube 2 15, and enters the condensation section conversion box 1 18 from the condensation section conversion box 1 12 through the condensation section heat exchange tube 3 16, and performs three return heat exchanges with the high-temperature flue gas moving toward the smoke outlet 2, and then passes through the main furnace body heat exchange tube 2 11 from the condensation section conversion box 1 The condensation part conversion box three 18 enters the main furnace body conversion box two 10, and enters the main furnace body conversion box one 6 from the main furnace body conversion box two 10 through the main furnace body heat exchange tube one 7, and undergoes two return heat exchanges with the high-temperature flue gas just generated by the burner 5. Finally, it enters the temporary storage box one 9 from the main furnace body conversion box one 6 through the connecting pipe 8 and is discharged along the water outlet pipe 4. After multiple heat exchanges, the high-temperature flue gas becomes low-temperature flue gas and is discharged from the smoke outlet 2. The water flow direction is opposite to the flue gas flow direction, which can improve the heat exchange efficiency. Three return heat exchanges are carried out in the condenser part and two return heat exchanges are carried out in the main furnace body. Multiple return heat exchanges further improve the heat exchange efficiency.

[0025] Working principle: After the gas is burned inside the burner 5, high-temperature flue gas is generated. The high-temperature flue gas exchanges heat with the main furnace body heat exchange tube 1 7 and the main furnace body heat exchange tube 2 11 and moves toward the smoke outlet 2. Cold water enters the temporary storage box 2 13 through the water inlet pipe 3, and then enters the condensation section conversion box 2 17 through the condensation section heat exchange tube 1 14, enters the condensation section conversion box 1 12 from the condensation section conversion box 2 17 through the condensation section heat exchange tube 2 15, and enters the condensation section conversion box 1 18 from the condensation section conversion box 1 12 through the condensation section heat exchange tube 3 16, and performs three return heat exchanges with the high-temperature flue gas moving toward the smoke outlet 2, and then passes through the main furnace body heat exchange tube 2 11 from the main furnace body heat exchange tube 11. The condensation part conversion box three 18 enters the main furnace body conversion box two 10, and enters the main furnace body conversion box one 6 from the main furnace body conversion box two 10 through the main furnace body heat exchange tube one 7, and undergoes two return heat exchanges with the high-temperature flue gas just generated by the burner 5. Finally, it enters the temporary storage box one 9 from the main furnace body conversion box one 6 through the connecting pipe 8 and is discharged along the water outlet pipe 4. After multiple heat exchanges, the high-temperature flue gas becomes low-temperature flue gas and is discharged from the smoke outlet 2. The water flow direction is opposite to the flue gas flow direction, which can improve the heat exchange efficiency. Three return heat exchanges are carried out in the condenser part and two return heat exchanges are carried out in the main furnace body. Multiple return heat exchanges further improve the heat exchange efficiency.

[0026] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent replacements for some of the technical features therein. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A multi-pass heat exchanger, comprising a shell (1), characterized in that: The right end of the shell (1) is connected to a condensation section heat exchange tube 1 (14) through an input assembly, the left end of the condensation section heat exchange tube 1 (14) is fixedly connected to a condensation section conversion box 2 (17), the right end of the condensation section conversion box 2 (17) is penetrated by a condensation section heat exchange tube 2 (15), the right end of the condensation section heat exchange tube 2 (15) is fixedly connected to a condensation section conversion box 1 (12), the left end of the condensation section conversion box 1 (12) is penetrated by a condensation section heat exchange tube 3 (16), the left end of the condensation section heat exchange tube 3 (16) is fixedly connected to a condensation section conversion box 3 (18), the A main furnace body heat exchange tube 2 (11) is passed through the right end of the condensation section conversion box 3 (18), and the right end of the main furnace body heat exchange tube 2 (11) is fixedly connected to the main furnace body conversion box 2 (10). A main furnace body heat exchange tube 1 (7) is passed through the left end of the main furnace body conversion box 2 (10), and the left end of the main furnace body heat exchange tube 1 (7) is fixedly connected to the main furnace body conversion box 1 (6). The right end of the main furnace body conversion box 1 (6) is connected to a water outlet pipe (4) through an output component. A burner (5) is fixedly connected to the inner wall of the shell (1), and a smoke outlet (2) is passed through the right end of the shell (1).

2. A multi-pass heat exchanger according to claim 1, characterized in that: The input component comprises a water inlet pipe (3) passing through the right end of the shell (1), the left end of the water inlet pipe (3) is fixedly connected to the second temporary storage box (13), and the right end of the first condensation part heat exchange pipe (14) is passed through the left end of the second temporary storage box (13).

3. The multi-pass heat exchanger according to claim 1, characterized in that: The output assembly comprises a connecting pipe (8) passing through the right end of the main furnace body conversion box (6), the right end of the connecting pipe (8) is fixedly connected to a temporary storage box (9), and the left end of the water outlet pipe (4) passes through the right end of the temporary storage box (9).

4. The multi-pass heat exchanger according to claim 1, characterized in that: The outer wall of the condensation section conversion box two (17) is arranged on the inner wall of the shell (1), the outer wall of the condensation section conversion box three (18) is arranged on the inner wall of the shell (1), and the rear end of the condensation section conversion box two (17) is arranged on the front end of the condensation section conversion box three (18).

5. The multi-pass heat exchanger according to claim 1, characterized in that: The outer wall of the condensation section conversion box one (12) is arranged on the inner wall of the shell (1), the outer wall of the main furnace body conversion box two (10) is arranged on the inner wall of the shell (1), and the front end of the main furnace body conversion box two (10) is arranged on the rear end of the condensation section conversion box one (12).

6. The multi-pass heat exchanger according to claim 1, characterized in that: The outer wall of the main furnace body conversion box (6) is arranged on the inner wall of the shell (1).

7. The multi-pass heat exchanger according to claim 2, characterized in that: The outer wall of the temporary storage box 2 (13) is arranged on the inner wall of the shell (1), and the rear end of the temporary storage box 2 (13) is arranged on the front end of the condensation part conversion box 1 (12).

8. The multi-pass heat exchanger according to claim 3, characterized in that: The outer wall of the temporary storage box (9) is arranged on the inner wall of the shell (1), the front end of the temporary storage box (9) is arranged on the rear end of the main furnace body conversion box (10), and the outer wall of the water outlet pipe (4) is arranged on the inner wall of the shell (1).

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