High-efficiency heat exchanger

Abstract

The utility model relates to the field of heat exchangers, and particularly discloses a high-efficiency heat exchanger which comprises a heat exchange box, a guide plate is arranged in the heat exchange box and divides the interior of a heat exchange cavity into a first heat exchange cavity and a second heat exchange cavity, a smoke inlet pipe is arranged in the second heat exchange cavity, and the second heat exchange cavity is communicated with a water inlet pipe. A water guide hole and a first smoke guide hole are formed in the flow guide plate, the second heat exchange cavity communicates with the first heat exchange cavity through the water guide hole, a heat exchange pipe is arranged in the first heat exchange cavity, the smoke inlet pipe communicates with the heat exchange pipe through the smoke guide hole, and the heat exchange pipe is of a continuous S-shaped structure or a spiral rising structure in the height direction of the first heat exchange cavity. A worker inputs cold water into the heat exchange box from the water inlet pipe, high-temperature flue gas can exchange heat with water, and waste heat in the flue gas is transferred into the water, so that energy recycling is achieved, the heat exchange efficiency can be effectively improved, meanwhile, the worker can weld and install the heat exchange pipe more conveniently, and the welding time is saved.

Description

Technical Field

[0001] The utility model relates to the field of heat exchanger industry, in particular to a high-efficiency heat exchanger. Background Art

[0002] Heat exchanger is a device that transfers part of the heat of hot fluid to cold fluid. Heat exchanger plays an important role in chemical, petroleum, power, food and many other industrial production.

[0003] The combustion furnace used for stove operation will generate a large amount of high-temperature flue gas when in use. In order to recover the waste heat of the high-temperature flue gas, the combustion furnace is usually connected to a heat exchanger. Cold water is passed into the heat exchanger, and the high-temperature flue gas exchanges heat with the cold water in the heat exchanger.

[0004] In the existing heat exchanger connected to the combustion furnace, a smoke collecting box is usually arranged inside the heat exchanger box, and a plurality of horizontally distributed finned tubes are welded and connected to the smoke collecting box. In this method, there are many welding points of the finned tubes on the smoke collecting box, and it is time-consuming and laborious for the workers to weld and fix the finned tubes. In addition, in this method, the smoke is easily retained on the finned tubes, the circulation of the smoke is not smooth, and the efficiency of the heat exchange between the smoke and water is reduced, and the practicality is low. Utility Model Content

[0005] The utility model provides a high-efficiency heat exchanger to solve the technical problems in the prior art that it is time-consuming and laborious for workers to weld and fix fin tubes, smoke is easily retained on the fin tubes, smoke circulation is not smooth, the efficiency of heat exchange between smoke and water is reduced, and the practicality is low.

[0006] In order to solve the above problems, the utility model provides a high-efficiency heat exchanger adopts the following technical solution: it includes a heat exchange box, a guide plate is arranged in the heat exchange box, the guide plate divides the interior of the heat exchange chamber into a first heat exchange chamber and a second heat exchange chamber, a smoke inlet pipe is arranged in the second heat exchange chamber, the second heat exchange chamber is connected with a water inlet pipe, a water guide hole and a first smoke guide hole are arranged on the guide plate, the second heat exchange chamber is connected with the first heat exchange chamber through the water guide hole, a heat exchange tube is arranged in the first heat exchange chamber, the smoke inlet pipe is connected with the heat exchange tube through the smoke guide hole, and the heat exchange tube presents a continuous S-shaped structure or a spiral rising structure along the height direction of the first heat exchange chamber.

[0007] Furthermore, a smoke exhaust portion is provided on the top of the heat exchange box, and a second smoke guide hole is provided on the heat exchange box, and the heat exchange pipe is interconnected with the smoke exhaust portion through the second smoke guide hole.

[0008] Furthermore, the diameters of the first smoke guide hole and the second smoke guide hole facing one end of the heat exchange tube are both smaller than the diameters of the ends away from the heat exchange tube.

[0009] Furthermore, the first smoke guide hole and the second smoke guide hole are both configured as truncated cone structures.

[0010] Furthermore, the smoke inlet pipe is arranged as an L-shaped structure, and the smoke inlet pipe is welded to the bottom end surface of the guide plate.

[0011] Furthermore, a drain pipe is provided on the side wall of the heat exchange box, and a first drain valve is provided on the drain pipe.

[0012] Furthermore, a drain pipe is provided at the bottom of the heat exchange box, the drain pipe is communicated with the second heat exchange chamber, and a second drain valve is provided on the drain pipe.

[0013] The utility model provides a high-efficiency heat exchanger with the following beneficial effects: the staff inputs cold water into the heat exchange box from the water inlet pipe, and the high-temperature flue gas can exchange heat with the water, transferring the waste heat in the flue gas to the water, thereby realizing energy recovery and utilization; since the heat exchange tube is in a continuous S-shaped structure or a spiral ascending structure in the first heat exchange chamber, this design greatly increases the contact time and area between the flue gas and the heat exchange tube, and can make the flue gas flow more smoothly, thereby effectively improving the heat exchange efficiency; at the same time, the water or other medium in the first heat exchange chamber can also absorb heat more efficiently; and the heat exchange tube has fewer installation welding points on the installation box, and only the two ends need to be welded and fixed to the guide plate and the top end face of the inner wall of the first heat exchange chamber, respectively, which can make it more convenient for the staff to weld and install the heat exchange tube and save welding time. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] By reading the detailed description below with reference to the accompanying drawings, the above and other purposes, features and advantages of the exemplary embodiments of the present invention will become easy to understand. In the accompanying drawings, several embodiments of the present invention are shown in an exemplary and non-limiting manner, and the same or corresponding reference numerals represent the same or corresponding parts, wherein:

[0015] Figure 1 The utility model is a structural schematic diagram of a high-efficiency heat exchanger.

[0016] Description of reference numerals:

[0017] 1. Heat exchange box; 11. Guide plate; 111. Water guide hole; 112. First smoke guide hole; 12. First heat exchange chamber; 121. Heat exchange tube; 13. Second heat exchange chamber; 131. Smoke inlet pipe; 132. Water inlet pipe; 14. Smoke exhaust section; 141. Second smoke guide hole; 15. Drain pipe; 151. First drain valve; 16. Drain pipe; 161. Second drain valve. DETAILED DESCRIPTION

[0018] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Those skilled in the art should know that the embodiments described below are part of the embodiments of the present disclosure, rather than all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the utility model.

[0019] Any number of elements in the drawings is for illustration and not limitation, and any naming is for distinction only and does not have any limiting meaning.

[0020] The principle and spirit of the present invention are explained in detail below with reference to several representative embodiments of the present invention.

[0021] The utility model provides a high-efficiency heat exchanger, such as Figure 1 As shown, it includes a heat exchange box 1, in which a guide plate 11 is arranged, the guide plate 11 divides the inside of the heat exchange chamber into a first heat exchange chamber 12 and a second heat exchange chamber 13, a smoke inlet pipe 131 is arranged in the second heat exchange chamber 13, the second heat exchange chamber 13 is connected with a water inlet pipe 132, a water guide hole 111 and a first smoke guide hole 112 are arranged on the guide plate 11, the second heat exchange chamber 13 is connected with the first heat exchange chamber 12 through the water guide hole 111, a heat exchange tube 121 is arranged in the first heat exchange chamber 12, the smoke inlet pipe 131 is connected with the heat exchange tube 121 through the smoke guide hole, and the heat exchange tube 121 is a continuous S-shaped structure or a spiral rising structure along the height direction of the first heat exchange chamber 12.

[0022] By adopting the above technical solution, the staff inputs cold water into the heat exchange box 1 from the water inlet pipe 132, and the high-temperature flue gas can exchange heat with the water, transferring the waste heat in the flue gas to the water, thereby realizing energy recovery and utilization. Since the heat exchange tube 121 is in a continuous S-shaped structure or a spiral ascending structure in the first heat exchange chamber 12, this design greatly increases the contact time and area between the flue gas and the heat exchange tube 121, and can make the flue gas flow more smoothly, thereby effectively improving the heat exchange efficiency. At the same time, the water or other medium in the first heat exchange chamber 12 can also absorb heat more efficiently, and the heat exchange tube 121 has fewer installation welding points on the installation box, and only the two ends need to be welded and fixed to the guide plate 11 and the top end face of the inner wall of the first heat exchange chamber 12, which can make it more convenient for the staff to weld and install the heat exchange tube 121 and save welding time.

[0023] In this embodiment, the smoke inlet pipe 131 is welded to the combustion furnace. The combustion furnace will generate high temperature and high-temperature flue gas when in use. The high-temperature flue gas enters the heat exchanger box 1 through the smoke inlet pipe 131. In other embodiments, the heat exchanger is not only suitable for combustion furnaces, but can also be widely used in other occasions requiring efficient heat exchange, such as industrial production, energy recovery and other fields.

[0024] In this embodiment, a smoke exhaust portion 14 is disposed on the top of the heat exchange box 1 , and a second smoke guide hole 141 is disposed on the heat exchange box 1 . The heat exchange pipe 121 is connected to the smoke exhaust portion 14 through the second smoke guide hole 141 .

[0025] In this embodiment, the diameters of the first smoke guide hole 112 and the second smoke guide hole 141 facing the end of the heat exchange tube 121 are both smaller than the diameters of the end away from the heat exchange tube 121, which facilitates the smoke to enter the heat exchange tube 121 from the smoke inlet pipe 131, and can increase the flow rate of the smoke from the heat exchange tube 121 to the smoke exhaust part 14, and can make the smoke enter the heat exchange tube 121 along the smoke inlet pipe 131 and be discharged through the smoke exhaust part 14. The flow effect is better.

[0026] In this embodiment, the first smoke guide hole 112 and the second smoke guide hole 141 are both configured as truncated cone structures. In other embodiments, the shape structures of the first smoke guide hole 112 and the second smoke guide hole 141 may be changed according to actual usage.

[0027] In this embodiment, two groups of heat exchange tubes 121, first smoke guide holes 112, and second smoke guide holes 141 are provided. In other embodiments, the number and arrangement of heat exchange tubes 121, first smoke guide holes 112, and second smoke guide holes 141 can be set according to actual usage requirements.

[0028] In this embodiment, the smoke inlet pipe 131 is configured as an L-shaped structure, and the smoke inlet pipe 131 is welded to the bottom end surface of the guide plate 11, so that the heat exchanger has a compact structure and a small footprint, and is suitable for various environments with space restrictions.

[0029] In this embodiment, a drain pipe 15 is provided on the side wall of the heat exchange box 1, and a first drain valve 151 is provided on the drain pipe 15 for draining the preheated water. In other embodiments, the preheated water can enter the combustion furnace through the drain pipe 15, and the ultra-high temperature heat generated by the combustion furnace heats the preheated water, thereby realizing waste heat recovery. The water is preheated and then heated, which can prevent the generation of a large amount of steam during heating, make the water more stable during heating, improve the heating stability, and improve the heating efficiency.

[0030] In this embodiment, a drain pipe 16 is provided at the bottom of the heat exchange box 1, and the drain pipe 16 is interconnected with the second heat exchange chamber 13. A second drain valve 161 is provided on the drain pipe 16 for draining sewage after the staff cleans the heat exchange box 1, which can make the heat exchanger more practical.

[0031] According to the above description of this specification, those skilled in the art may also understand that the terms used below, such as "up", "down", "front", "back", "left", "right", "width", "horizontal", "top", "bottom", "inside", "outside" and other terms indicating orientation or position relationship are based on the orientation or position relationship shown in the drawings of this specification, which are only for the purpose of facilitating the explanation of the scheme of the utility model and simplifying the description, rather than explicitly or implicitly indicating that the device or element involved must have the specific orientation, be constructed and operate in a specific orientation. Therefore, the above-mentioned orientation or position relationship terms cannot be understood or interpreted as limitations on the scheme of the utility model.

[0032] In addition, in the description of this specification, “plurality” means at least two, for example, two, three or more, etc., unless otherwise clearly and specifically defined.

Claims

1. A high efficiency heat exchanger, characterized in that: It includes a heat exchange box, in which a guide plate is arranged, the guide plate divides the interior of the heat exchange chamber into a first heat exchange chamber and a second heat exchange chamber, a smoke inlet pipe is arranged in the second heat exchange chamber, the second heat exchange chamber is connected with a water inlet pipe, a water guide hole and a first smoke guide hole are arranged on the guide plate, the second heat exchange chamber is connected with the first heat exchange chamber through the water guide hole, a heat exchange tube is arranged in the first heat exchange chamber, the smoke inlet pipe is connected with the heat exchange tube through the smoke guide hole, and the heat exchange tube presents a continuous S-shaped structure or a spiral rising structure along the height direction of the first heat exchange chamber.

2. A high efficiency heat exchanger according to claim 1, characterized in that: A smoke exhaust portion is arranged on the top of the heat exchange box, and a second smoke guide hole is arranged on the heat exchange box, through which the heat exchange pipe is communicated with the smoke exhaust portion.

3. A high efficiency heat exchanger according to claim 2, characterized in that: The diameters of the first smoke guide hole and the second smoke guide hole facing one end of the heat exchange tube are both smaller than the diameters of the ends away from the heat exchange tube.

4. A high efficiency heat exchanger according to claim 3, characterized in that: The first smoke guide hole and the second smoke guide hole are both configured as truncated cone structures.

5. The high-efficiency heat exchanger according to claim 1, characterized in that: The smoke inlet pipe is arranged as an L-shaped structure, and the smoke inlet pipe is welded to the bottom end surface of the guide plate.

6. A high efficiency heat exchanger according to claim 1, characterized in that: A drain pipe is arranged on the side wall of the heat exchange box, and a first drain valve is arranged on the drain pipe.

7. A high efficiency heat exchanger according to claim 1, characterized in that: A sewage pipe is arranged at the bottom of the heat exchange box, the sewage pipe is communicated with the second heat exchange chamber, and a second drainage valve is arranged on the sewage pipe.

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