Boiler heat recovery device

Abstract

The utility model relates to the technical field of boiler heat recovery, in particular to a boiler heat recovery device which comprises a water storage tank, a heat exchange mechanism and a driving mechanism. A water inlet pipe is arranged on the lower portion of the side wall of the water storage tank, and a communicating pipe is arranged on the upper portion of the side wall of the water storage tank. The heat exchange mechanism comprises a smoke inlet pipe, a lower rotating pipe, multiple coiled pipes, an upper rotating pipe and a smoke exhaust pipe, the lower rotating pipe and the upper rotating pipe are arranged in the centers of the upper end and the lower end of the water storage tank correspondingly, the smoke inlet pipe is arranged at the lower end of the lower rotating pipe, the smoke exhaust pipe is arranged at the upper end of the upper rotating pipe, and the multiple coiled pipes are arranged between the lower rotating pipe and the upper rotating pipe; the driving mechanism is arranged on the water storage tank and used for driving the coiled pipe to rotate; the coiled pipe provides a larger contact area, so that more heat is transferred into water from the flue gas; meanwhile, disturbance and turbulent flow are generated through rotation of the coiled pipe, uneven water temperature in the water storage tank is prevented, and the heat exchange efficiency is further improved.

Description

Technical Field

[0001] This utility model relates to the field of boiler heat recovery technology, specifically to a boiler heat recovery device. Background Technology

[0002] Combined heat and power (CHP) is a highly efficient energy utilization method that simultaneously produces electricity and heat. By generating electricity and hot water or steam in a single unit and recovering waste heat from boiler emissions, the overall energy efficiency of the system is improved. These devices typically include heat exchangers, flue gas heat recovery systems, etc., which transfer heat from waste gas to water or other media, converting it into usable heat energy to supply boilers or other equipment. This reduces energy waste, lowers fuel consumption, and improves the system's economic efficiency and environmental friendliness.

[0003] In the prior art, such as the Chinese patent with publication number CN218884720U entitled "A Boiler Flue Gas Heat Recovery Device," the disclosed technical solution describes a device comprising a main recovery mechanism and a secondary recovery mechanism. When the flue gas flows rapidly or has a high temperature, the flue gas outlet pipe is closed and the guide pipe of the secondary recovery mechanism is opened, allowing the flue gas discharged from the main recovery mechanism to enter the secondary recovery mechanism for secondary heat recovery, thereby improving heat recovery efficiency. However, when the main recovery mechanism in this device achieves heat exchange through water storage or circulating water sources, the water temperature around the pipe may rise while the water temperature away from the pipe remains low. This uneven water temperature in the heat recovery device reduces the temperature difference between the flue gas and water, thus affecting the heat exchange efficiency and reducing the heat recovery efficiency. Utility Model Content

[0004] This invention provides a boiler heat recovery device to solve the above-mentioned problems.

[0005] This utility model adopts the following technical solution: a boiler heat recovery device, including a water storage tank, a heat exchange mechanism, and a drive mechanism; a support is fixedly installed at the lower end of the water storage tank, and an anti-slip pad is fixedly installed at the lower end of the support; a vacuum cavity is opened in the side wall of the water storage tank; a water inlet pipe is fixedly installed at the lower part of the side wall of the water storage tank, and the water inlet pipe is offset from the axis of the water storage tank; a connecting pipe is fixedly installed at the upper part of the side wall of the water storage tank, and the connecting pipe is offset from the axis of the water storage tank, with the water inlet pipe and the connecting pipe on both sides of the axis of the water storage tank; the heat exchange mechanism includes a flue pipe, a lower rotating pipe, a serpentine pipe, an upper rotating pipe, a flue pipe, and a filter assembly; the lower rotating pipe is rotatably installed at the center of the lower end of the water storage tank, and the upper rotating pipe is rotatably installed at the center of the upper end of the water storage tank; the flue pipe is rotatably installed at the lower end of the lower rotating pipe, and the flue pipe is rotatably installed at the upper end of the upper rotating pipe; multiple serpentine pipes are provided, and the multiple serpentine pipes are evenly distributed along the circumference of the water storage tank, with the lower end of the serpentine pipe and the connecting pipe being offset from the axis of the water storage tank. The lower rotating tube is fixedly connected, and the upper end of the serpentine tube is fixedly connected to the upper rotating tube. The filter assembly is located on the water storage tank and is used to filter the exhaust flue gas. The drive mechanism is located on the water storage tank and is used to drive the heat exchange mechanism. Water is injected into the water storage tank through the inlet pipe. Because the inlet pipe is offset from the axis of the water storage tank, the water in the water storage tank will swirl when water is injected. The flue gas discharged from the boiler enters the serpentine tube through the flue gas inlet pipe and the lower rotating tube. The serpentine tube can provide a larger contact area in the limited space of the water storage tank, so that more heat can be transferred from the flue gas to the water. The drive mechanism makes the serpentine tube rotate slowly in the opposite direction of the swirl, so that the water in the water storage tank will generate more disturbance and turbulence, further improving the heat exchange efficiency and preventing uneven water temperature in the water storage tank. The flue gas in the serpentine tube enters the filter assembly through the upper rotating tube and the exhaust pipe, and is discharged after filtration.

[0006] Furthermore, a water pump is fixedly installed on the connecting pipe, with the water pump inlet connected to the connecting pipe and a drain pipe fixedly installed at the water pump outlet; the water pump draws the heated water from the storage tank through the connecting pipe and then discharges it through the drain pipe for recycling.

[0007] Furthermore, the drive mechanism includes a motor, a first bevel gear, and a second bevel gear. The motor is fixedly mounted on the upper end of the water storage tank, the first bevel gear is fixedly mounted on the motor output shaft, and the second bevel gear is fixedly mounted on the upper rotating tube. The first bevel gear and the second bevel gear mesh with each other. The motor causes the upper rotating tube to rotate through the first bevel gear and the second bevel gear, thereby causing the upper rotating tube to drive the serpentine tube to rotate.

[0008] The beneficial effect is that the serpentine tube provides a larger contact area in the limited space of the water storage tank, allowing more heat to be transferred from the flue gas to the water;

[0009] Meanwhile, by setting the inlet pipe off-axis from the water tank, the water in the tank is made to swirl. Then, by rotating the serpentine pipe in the opposite direction of the swirl, more disturbance and turbulence are generated in the water in the tank, which further improves the heat exchange efficiency and prevents uneven water temperature in the tank. Attached Figure Description

[0010] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0011] Figure 1 This is a schematic diagram of an embodiment of a boiler heat recovery device according to the present invention;

[0012] Figure 2 This is a cross-sectional view of an embodiment of the present utility model;

[0013] Figure 3 This is a schematic diagram of the heat exchange mechanism according to an embodiment of the present invention;

[0014] Figure 4 This is a cross-sectional view of the upper and lower rotating tubes of an embodiment of the present invention.

[0015] In the diagram: 100, water storage tank; 101, vacuum chamber; 110, water inlet pipe; 120, connecting pipe; 130, water pump; 140, drain pipe; 150, mounting bracket; 160, support; 161, anti-slip mat; 200, smoke inlet pipe; 210, lower rotating pipe; 220, serpentine pipe; 230, upper rotating pipe; 240, smoke exhaust pipe; 300, motor; 310, first bevel gear; 320, second bevel gear. Detailed Implementation

[0016] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0017] An embodiment of the boiler heat recovery device of this utility model, such as... Figures 1 to 4As shown: A boiler heat recovery device includes a water storage tank 100, a heat exchange mechanism, and a drive mechanism; a support 160 is fixedly installed at the lower end of the water storage tank 100, and an anti-slip pad 161 is fixedly installed at the lower end of the support 160; a vacuum chamber 101 is formed in the side wall of the water storage tank 100; a water inlet pipe 110 is fixedly installed on the lower part of the side wall of the water storage tank 100, and the water inlet pipe 110 is offset from the axis of the water storage tank 100; a connecting pipe 120 is fixedly installed on the upper part of the side wall of the water storage tank 100, and the connecting pipe 120 is offset from the axis of the water storage tank 100, and the water inlet pipe 110 and the connecting pipe 120 are connected. Pipe 120 is located on both sides of the axis of the water storage tank 100; the heat exchange mechanism includes a flue pipe 200, a lower rotating pipe 210, a serpentine pipe 220, an upper rotating pipe 230, a flue pipe 240, and a filter assembly; the lower rotating pipe 210 is rotatably installed at the lower center of the water storage tank 100, and the upper rotating pipe 230 is rotatably installed at the upper center of the water storage tank 100; the flue pipe 200 is rotatably installed at the lower end of the lower rotating pipe 210, and the flue pipe 240 is rotatably installed at the upper end of the upper rotating pipe 230; multiple serpentine pipes 220 are provided, and the multiple serpentine pipes 220 are arranged around the circumference of the water storage tank 100. The serpentine tube 220 is uniformly distributed, with its lower end fixedly connected to the lower rotating tube 210 and its upper end fixedly connected to the upper rotating tube 230. A filter assembly is mounted on the water storage tank 100 and is used to filter the exhaust flue gas. A drive mechanism is mounted on the water storage tank 100 and is used to drive the heat exchange mechanism. Water is injected into the water storage tank 100 through the inlet pipe 110. Because the inlet pipe 110 is offset from the axis of the water storage tank 100, the water in the tank 100 swirls when water is injected. The flue gas discharged from the boiler passes through the flue gas inlet pipe 20. The flue gas enters the serpentine tube 220 through the lower rotating tube 210. The serpentine tube 220 can provide a larger contact area in the limited space of the water storage tank 100, thereby transferring more heat from the flue gas to the water. The serpentine tube 220 is slowly rotated in the opposite direction of the vortex by the driving mechanism, which generates more disturbance and turbulence in the water storage tank 100, further improving the heat exchange efficiency and preventing uneven water temperature in the water storage tank 100. The flue gas in the serpentine tube 220 enters the filter assembly through the upper rotating tube 230 and the exhaust pipe 240, and is discharged after filtration.

[0018] A water pump 130 is fixedly installed on the connecting pipe 120. The inlet of the water pump 130 is connected to the connecting pipe 120, and a drain pipe 140 is fixedly installed on the outlet of the water pump 130. The water pump 130 draws the heated water from the water storage tank 100 through the connecting pipe 120 and then discharges it through the drain pipe 140 for recycling.

[0019] The drive mechanism includes a motor 300, a first bevel gear 310, and a second bevel gear 320. The motor 300 is fixedly installed on the upper end of the water storage tank 100, the first bevel gear 310 is fixedly installed on the output shaft of the motor 300, and the second bevel gear 320 is fixedly installed on the upper rotating tube 230. The first bevel gear 310 and the second bevel gear 320 mesh together. The motor 300 causes the upper rotating tube 230 to rotate through the first bevel gear 310 and the second bevel gear 320, thereby causing the upper rotating tube 230 to drive the serpentine tube 220 to rotate.

[0020] Based on the above embodiments, the working principle and process of this utility model are as follows: Water is injected into the water storage tank 100 through the inlet pipe 110. Since the inlet pipe 110 is offset from the axis of the water storage tank 100, the water in the water storage tank 100 will swirl when water is injected into the water storage tank 100; the flue gas discharged from the boiler enters the serpentine pipe 220 through the flue gas inlet pipe 200 and the lower rotating pipe 210. The serpentine pipe 220 can provide a larger contact area in the limited space in the water storage tank 100, thereby allowing more heat to be transferred from the flue gas to the water;

[0021] The motor 300 rotates the upper rotating tube 230 through the first bevel gear 310 and the second bevel gear 320, thereby causing the upper rotating tube 230 to drive the serpentine tube 220 to rotate slowly, generating more disturbance and turbulence in the water storage tank 100, further improving the heat exchange efficiency, and preventing uneven water temperature in the water storage tank 100; the water pump 130 draws the heated water out of the water storage tank 100 through the connecting pipe 120, and then discharges it through the drain pipe 140 for recycling.

[0022] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A boiler heat recovery device, characterized in that: Includes a water storage tank (100), a heat exchange mechanism, and a drive mechanism; A water inlet pipe (110) is fixedly installed on the lower part of the side wall of the water storage tank (100), and the water inlet pipe (110) is offset from the axis of the water storage tank (100); a connecting pipe (120) is fixedly installed on the upper part of the side wall of the water storage tank (100), and the connecting pipe (120) is offset from the axis of the water storage tank (100). The water inlet pipe (110) and the connecting pipe (120) are on both sides of the axis of the water storage tank (100). The heat exchange mechanism includes an inlet pipe (200), a lower rotating pipe (210), a serpentine pipe (220), an upper rotating pipe (230), and an exhaust pipe (240). The lower rotating pipe (210) is rotatably installed at the lower center of the water storage tank (100), and the upper rotating pipe (230) is rotatably installed at the upper center of the water storage tank (100). The inlet pipe (200) is rotatably installed at the lower end of the lower rotating pipe (210), and the exhaust pipe (240) is rotatably installed at the upper end of the upper rotating pipe (230). Multiple serpentine pipes (220) are provided, and the multiple serpentine pipes (220) are evenly distributed around the circumference of the water storage tank (100). The lower end of the serpentine pipe (220) is fixedly connected to the lower rotating pipe (210), and the upper end of the serpentine pipe (220) is fixedly connected to the upper rotating pipe (230). The drive mechanism is mounted on the water storage tank (100) and is used to drive the heat exchange mechanism.

2. The boiler heat recovery device according to claim 1, characterized in that: A water pump (130) is fixedly installed on the connecting pipe (120). The inlet of the water pump (130) is connected to the connecting pipe (120), and a drain pipe (140) is fixedly installed at the outlet of the water pump (130).

3. The boiler heat recovery device according to claim 2, characterized in that: The drive mechanism includes a motor (300), a first bevel gear (310), and a second bevel gear (320). The motor (300) is fixedly installed on the upper end of the water storage tank (100). The first bevel gear (310) is fixedly installed on the output shaft of the motor (300). The second bevel gear (320) is fixedly installed on the upper rotating tube (230). The first bevel gear (310) and the second bevel gear (320) mesh with each other.

4. A boiler heat recovery device according to claim 3, characterized in that: A vacuum chamber (101) is provided in the side wall of the water storage tank (100).

5. A boiler heat recovery device according to claim 4, characterized in that: A support (160) is fixedly installed at the lower end of the water storage tank (100).

6. A boiler heat recovery device according to claim 5, characterized in that: An anti-slip pad (161) is fixedly installed at the lower end of the support (160).

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