Boiler flue gas condensing combustion heat exchange integrated device
By designing an integrated boiler flue gas condensation combustion heat exchange device, the problem of excessive boiler size was solved, achieving a compact structure and efficient heat recovery, and improving transportation convenience and energy-saving effect.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- WUHAN GREEN ENERGY SHUANGYUAN BOILER CO LTD
- Filing Date
- 2025-07-23
- Publication Date
- 2026-05-29
AI Technical Summary
In existing boiler structures, the boiler body and condensing mechanism are separate, resulting in an excessively large overall size, occupying a lot of space, and being non-compact.
Design an integrated boiler flue gas condensation and combustion heat exchange device. The device forms a compact overall structure by welding the outer shell of the furnace body and the outer shell of the condensation box. The integration of flue gas condensation and combustion heat exchange is achieved through connecting pipes, heat exchange coils and braided tubes.
It reduces the boiler's footprint, improves transportation convenience, and achieves energy-saving effects through efficient heat recovery and prevention of scale formation.
Smart Images
Figure CN224302123U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of boiler technology, specifically to an integrated device for boiler flue gas condensation, combustion, and heat exchange. Background Technology
[0002] A boiler is an energy conversion device. The energy input to a boiler includes the chemical energy of fuel and electrical energy. The boiler outputs steam, high-temperature water, or organic heat carriers with a certain amount of thermal energy.
[0003] Chinese patent application No. 202020877941.4 discloses a gas-fired low-NOx condensing steam boiler, including a base frame, a boiler body, a purification box, and a condensing mechanism. The base frame is a rectangular steel frame, and the boiler body is mounted on the base frame. A burner and condensing mechanism are located at one end of the boiler body. The condensing mechanism includes a first cooling box, a first air guide pipe, a condensing box, and a first condensing pipe. The first cooling box is located on the outer wall of the flue gas pipe on the boiler body, and a second condensing pipe is installed inside the first cooling box. One end of the second condensing pipe is connected to the inlet water tank via a first water pipe, and the other end of the second condensing pipe is connected to the condensing box via a second water pipe. In the above patent, the boiler body and the condensing box are separate, resulting in an insufficiently compact structure and an excessively large overall boiler volume. Therefore, there is an urgent need to design an integrated boiler flue gas condensation, combustion, and heat exchange device to solve the above problems. Utility Model Content
[0004] The purpose of this invention is to provide an integrated boiler flue gas condensation, combustion, and heat exchange device to address the aforementioned shortcomings in the prior art.
[0005] To achieve the above objectives, this utility model provides the following technical solution:
[0006] An integrated boiler flue gas condensation, combustion, and heat exchange device includes a boiler shell, a condenser shell on one side of the boiler shell, a connecting pipe welded between the boiler shell and the condenser shell, a heat exchange coil I fixed inside the boiler shell, a heat exchange coil II fixed inside the condenser shell, a connector I welded to one side of the outer wall of the boiler shell, one end of the heat exchange coil I connected to connector I, a connector II welded to one side of the outer wall of the condenser shell, one end of the heat exchange coil II connected to connector II, a valve connected to one end of connector I, a braided tube connected between the valve and connector II, and the boiler shell and the condenser shell in communication.
[0007] Furthermore, a flue pipe is welded to one side of the outer wall of the condenser shell, an installation port is provided on the top outer wall of the furnace shell, a connecting nozzle is welded to the top outer wall of the connector, and a temperature sensor is fixed inside the connecting nozzle.
[0008] Furthermore, a conical shroud is fixed to the top inner wall of the furnace shell, and the bottom end of the conical shroud extends into the interior of the heat exchange coil, and the conical shroud is adapted to the mounting port.
[0009] Furthermore, a steam outlet pipe is fixed to the top outer wall of the furnace shell, and the end of the heat exchange coil one away from the joint one is connected to the steam outlet pipe. A water inlet pipe is welded to the bottom outer wall of the condenser shell, and the top end of the water inlet pipe extends into the interior of the condenser shell and connects to the heat exchange coil two.
[0010] Furthermore, the heat exchange coil includes a metal tube, the outer wall of which is provided with uniformly distributed heat exchange fins, and the inner wall of which is provided with an anti-scaling layer.
[0011] Furthermore, the inner wall of the furnace shell is provided with a heat insulation layer, and a high-temperature resistant layer is provided on the side of the heat insulation layer away from the furnace shell.
[0012] In the above technical solution, the integrated boiler flue gas condensation combustion heat exchange device provided by this utility model has the following advantages: The furnace shell and the condenser shell are welded together by connecting pipes, allowing the combustion heat exchange part and the flue gas condensation part of the boiler to form a compact integrated structure, thereby reducing the overall footprint of the boiler and making it easier to transport; Connecting heat exchange coil one and heat exchange coil two allows heat exchange coil two to recover heat from the flue gas, making it easier for water to boil inside heat exchange coil one, achieving energy saving during boiler operation; the heat exchange plates prevent scale formation on the inner walls of heat exchange coil one and heat exchange coil two, ensuring high heat exchange efficiency; connecting the valve and connector two by braided tubing, due to the flexibility of the braided tubing, eliminates the need for strict control of the distance between the valve and connector two, making connection of the valve and connector two more convenient. Attached Figure Description
[0013] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this utility model. For those skilled in the art, other drawings can be obtained based on these drawings.
[0014] Figure 1 This is a schematic diagram of the overall structure of an embodiment of the integrated boiler flue gas condensation, combustion, and heat exchange device of this utility model.
[0015] Figure 2 This is a schematic diagram of the internal structure of an embodiment of the integrated boiler flue gas condensation, combustion, and heat exchange device of this utility model.
[0016] Figure 3 This is a schematic diagram of the heat exchange plate structure provided in an embodiment of the integrated boiler flue gas condensation combustion heat exchange device of this utility model.
[0017] Explanation of reference numerals in the attached figures:
[0018] 1 Furnace shell, 2 Condensation box shell, 3 Connecting pipe, 4 Mounting port, 5 Heat exchanger coil one, 6 Heat exchanger coil two, 7 Valves, 8 Exhaust pipe, 9 Steam outlet pipe, 10 Insulation layer, 11 High temperature resistant layer, 12 Conical cover, 13 Connecting nozzle, 14 Temperature sensor, 15 Metal pipe, 16 Heat exchanger plate, 17 Anti-scaling layer, 18 Braided pipe, 19 Connector two, 20 Connector one, 21 Water inlet pipe. Detailed Implementation
[0019] To enable those skilled in the art to better understand the technical solution of this utility model, the present utility model will be further described in detail below with reference to the accompanying drawings.
[0020] like Figure 1-3 As shown in the figure, the present invention provides an integrated boiler flue gas condensation combustion heat exchange device, including a furnace shell 1, a condensing box shell 2 on one side of the furnace shell 1, a connecting pipe 3 welded between the furnace shell 1 and the condensing box shell 2, a heat exchange coil 5 fixed inside the furnace shell 1, a heat exchange coil 6 fixed inside the condensing box shell 2, a connector 20 welded to one side of the outer wall of the furnace shell 1, one end of the heat exchange coil 5 connected to the connector 20, a connector 19 welded to one side of the outer wall of the condensing box shell 2, one end of the heat exchange coil 6 connected to the connector 19, a valve 7 connected to one end of the connector 20, a braided pipe 18 connected between the valve 7 and the connector 19, and the furnace shell 1 and the condensing box shell 2 being in communication.
[0021] Specifically, in this embodiment, the furnace includes a furnace shell 1, a condenser shell 2 on one side of the furnace shell 1, and a connecting pipe 3 welded between the furnace shell 1 and the condenser shell 2. The connecting pipe 3 connects the furnace shell 1 and the condenser shell 2, and the channel formed by the connecting pipe 3 is relatively large, allowing flue gas to easily enter the interior of the condenser shell 2 from the furnace shell 1. A heat exchange coil 5 is fixed inside the furnace shell 1, and a heat exchange coil 6 is fixed inside the condenser shell 2. A connector 20 is welded to the outer wall of one side of the furnace shell 1, and one end of the heat exchange coil 5 is connected to the connector 20. A connector 19 is welded to the outer wall of one side of the condenser shell 2. One end of pipe 26 is connected to connector 219, and one end of connector 120 is connected to valve 7. A braided tube 18 is connected between valve 7 and connector 219. The outer layer of the braided tube 18 is made of stainless steel braid and the inner layer is made of high-temperature resistant rubber, which gives the braided tube 18 a flexible characteristic. The furnace shell 1 is connected to the condenser shell 2. The valve 7 and connector 219 are connected through the braided tube 18. Due to the flexible characteristic of the braided tube 18, the distance between valve 7 and connector 219 does not need to be strictly controlled, which reduces the difficulty of welding connector 219 and connector 120, and makes it more convenient to connect valve 7 and connector 219.
[0022] This utility model provides an integrated boiler flue gas condensation combustion heat exchange device. The furnace shell 1 and the condensation box shell 2 are welded together by connecting pipe 3, so that the combustion heat exchange part and the flue gas condensation part of the boiler can form an integrated compact effect, thereby reducing the overall footprint of the boiler and making it more convenient to transport.
[0023] In another embodiment of this utility model, a flue pipe 8 is welded to one side of the outer wall of the condenser shell 2. The flue gas entering the condenser shell 2 is discharged from the flue pipe 8. An installation port 4 is provided on the top outer wall of the furnace shell 1. The installation port 4 is used for installing the burner. After the burner is installed, the installation port 4 will be sealed. A connecting nozzle 13 is welded to the top outer wall of the connector 20. A temperature sensor 14 is fixed inside the connecting nozzle 13. The temperature sensor 14 can detect the water temperature entering the connector 20 and display the water temperature on the display device so as to understand the heat recovery status of the boiler in a timely manner. The detection and display principle of the temperature sensor 14 is the prior art.
[0024] In another embodiment of this utility model, a conical cover 12 is fixed to the top inner wall of the furnace shell 1. The conical cover 12 is made of refractory material. The bottom end of the conical cover 12 extends into the interior of the heat exchange coil 5. The burner nozzle extends out from the interior of the conical cover 12, so that the conical cover 12 can protect the burner and prevent the burner from being damaged by the heat generated by the flame. The conical cover 12 is compatible with the mounting port 4.
[0025] In another embodiment of this utility model, a steam outlet pipe 9 is fixed on the top outer wall of the furnace shell 1. The end of the heat exchange coil 5 away from the connector 20 is connected to the steam outlet pipe 9. The steam generated inside the heat exchange coil 5 is discharged from the steam outlet pipe 9. A water inlet pipe 21 is welded to the bottom outer wall of the condenser shell 2. The top end of the water inlet pipe 21 extends into the interior of the condenser shell 2 and is connected to the heat exchange coil 6. The water to be heated enters the heat exchange coil 6 from the water inlet pipe 21.
[0026] In another embodiment of this utility model, heat exchange coil one 5 includes a metal tube 15, and heat exchange fins 16 are uniformly distributed on the outer wall of the metal tube 15. Both the metal tube 15 and the heat exchange fins 16 are made of the same material as heat exchange coils in the prior art. An anti-scaling layer 17 is provided on the inner wall of the metal tube 15. Simultaneously, the anti-scaling layer 17 is a Teflon coating on the interior of heat exchange coil two 6. Connecting heat exchange coil one and heat exchange coil two 6 allows heat exchange coil two 6 to recover heat from the flue gas, thereby enabling water to exchange heat effectively. Heating the heat exchange coil 5 to boiling point is easier, achieving energy-saving effects during boiler operation. Furthermore, the anti-scaling layer 17 prevents scale formation on the inner walls of heat exchange coils 5 and 6, allowing them to maintain high heat exchange efficiency. The inner wall of the furnace shell 1 is provided with an insulation layer 10, and a high-temperature resistant layer 11 is provided on the side of the insulation layer 10 away from the furnace shell 1. The insulation layer 10 prevents heat loss from the furnace shell 1, making the boiler more energy-efficient.
[0027] Working principle: During use, the water to be heated is introduced into the heat exchange coil 6 through the inlet pipe 21. The water then passes through the heat exchange coil 6 and enters the braided tube 18, the connector 20, and the heat exchange coil 5 in sequence. This causes the flames emitted from the burner at the conical shroud 12 to heat the inside of the heat exchange coil 5, thereby causing the water inside the heat exchange coil 5 to evaporate into steam and be discharged from the steam outlet pipe 9. At the same time, the flue gas generated by combustion inside the furnace shell 1 enters the condenser shell 2 through the connecting pipe 3, allowing the water inside the heat exchange coil 6 to absorb the heat in the flue gas, thus achieving the effect of condensing the flue gas. Finally, the flue gas is discharged from the exhaust pipe 8.
[0028] The foregoing description only illustrates certain exemplary embodiments of the present invention. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.
Claims
1. An integrated boiler flue gas condensation, combustion, and heat exchange device, characterized in that, The furnace includes a furnace shell (1), a condenser shell (2) is provided on one side of the furnace shell (1), a connecting pipe (3) is welded between the furnace shell (1) and the condenser shell (2), a heat exchange coil (5) is fixed inside the furnace shell (1), a heat exchange coil (6) is fixed inside the condenser shell (2), a connector (20) is welded to one side of the outer wall of the furnace shell (1), one end of the heat exchange coil (5) is connected to the connector (20), a connector (19) is welded to one side of the outer wall of the condenser shell (2), one end of the heat exchange coil (6) is connected to the connector (19), a valve (7) is connected to one end of the connector (20), a braided pipe (18) is connected between the valve (7) and the connector (19), and the furnace shell (1) and the condenser shell (2) are connected in communication.
2. The integrated boiler flue gas condensation, combustion, and heat exchange device according to claim 1, characterized in that, A flue pipe (8) is welded to one side of the outer wall of the condenser shell (2), an installation port (4) is provided on the top outer wall of the furnace shell (1), a connecting nozzle (13) is welded to the top outer wall of the connector (20), and a temperature sensor (14) is fixed inside the connecting nozzle (13).
3. The integrated boiler flue gas condensation, combustion, and heat exchange device according to claim 1, characterized in that, A conical shroud (12) is fixed to the top inner wall of the furnace shell (1). The bottom end of the conical shroud (12) extends into the interior of the heat exchange coil (5). The conical shroud (12) is adapted to the mounting port (4).
4. The integrated boiler flue gas condensation, combustion, and heat exchange device according to claim 1, characterized in that, A steam outlet pipe (9) is fixed on the top outer wall of the furnace shell (1). The end of the heat exchange coil (5) away from the connector (20) is connected to the steam outlet pipe (9). A water inlet pipe (21) is welded to the bottom outer wall of the condenser shell (2). The top end of the water inlet pipe (21) extends into the interior of the condenser shell (2) and is connected to the heat exchange coil (6).
5. The integrated boiler flue gas condensation, combustion, and heat exchange device according to claim 1, characterized in that, The heat exchange coil (5) includes a metal tube (15), the outer wall of which is provided with uniformly distributed heat exchange fins (16), and the inner wall of which is provided with an anti-scaling layer (17).
6. The integrated boiler flue gas condensation, combustion, and heat exchange device according to claim 1, characterized in that, The inner wall of the furnace shell (1) is provided with a heat insulation layer (10), and a high temperature resistant layer (11) is provided on the side of the heat insulation layer (10) away from the furnace shell (1).