Flue gas waste heat recovery heat exchanger with leak detection structure

Abstract

The utility model belongs to the technical field of recovery heat exchanger, concretely relates to a flue gas waste heat recovery heat exchanger with leak detection structure, a flue gas waste heat recovery heat exchanger with leak detection structure, including recovery heat exchanger body, recovery heat exchanger body inside is provided with heat pipe, the heat pipe includes the water inlet and water outlet of extending recovery heat exchanger body inside organism, recovery heat exchanger body still includes the flue inlet pipe and the flue outlet pipe, the flue inlet pipe entrance is equipped with the filter component for intercepting the smoke dust, the recovery heat exchanger body outer wall is equipped with detachable monitoring assembly, the monitoring assembly includes the barometric pressure sensor for real -time monitoring recovery heat exchanger body inside barometric pressure change, through the barometric pressure sensor real -time monitoring inside barometric pressure change in monitoring assembly, the detachable structure design of combination screw pipe, monitoring assembly can be quickly disassembled replacement.

Description

Technical Field

[0001] This utility model belongs to the technical field of heat recovery heat exchangers, specifically relating to a flue gas waste heat recovery heat exchanger with a leak detection structure. Background Technology

[0002] In the power, metallurgy, chemical, and building materials industries, the temperature of emitted flue gas is relatively high, resulting in heat loss. Flue gas heat loss is the largest heat loss among all heat losses in power plant boilers. Generally, during normal operation, flue gas heat loss accounts for 4% to 8% of the boiler's fuel input heat in large and medium-sized power plant boilers. Furthermore, a reduction of 15°C to 25°C in flue gas temperature can improve boiler efficiency by about 1%. With the continuous deepening of energy conservation efforts in my country, people are paying increasing attention to the energy waste caused by high flue gas temperatures. Many coal-fired power plants have already utilized flue gas waste heat recovery devices to further reduce the emitted flue gas temperature by 20°C to 50°C, achieving certain results. In the prior art, utility model patent CN 216011864 U discloses a flue gas waste heat recovery heat exchanger with a leak detection structure, relating to the field of heat exchanger technology. It uses four thermal imaging detectors and two pressure sensors to monitor the main body of the flue gas waste heat recovery heat exchanger in real time. When a leak occurs in the main body of the flue gas waste heat recovery heat exchanger, the thermal imaging detectors and pressure sensors detect the leak and transmit the signal to an alarm device, thus promptly issuing an alarm to notify personnel for maintenance, reducing heat loss and lowering the risk of burns to workers. However, this solution relies on thermal imaging detectors to monitor external heat escape. In high-temperature, dusty industrial environments, the surface temperature of the equipment is easily affected by interference, leading to false alarms or missed alarms. Furthermore, the pressure sensors are easily damaged in high-temperature environments, making replacement difficult. Utility Model Content

[0003] In view of the above-mentioned shortcomings in the prior art, the present invention provides a flue gas waste heat recovery heat exchanger with a leak detection structure to solve the problems in the background art.

[0004] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: a flue gas waste heat recovery heat exchanger with a leak detection structure, comprising a heat exchanger body, wherein a heat-conducting pipe is provided inside the heat exchanger body, the heat-conducting pipe includes an inlet and an outlet extending out of the internal body of the heat exchanger body, the heat exchanger body also includes a flue gas inlet pipe and a flue gas outlet pipe, a filter assembly for intercepting flue gas dust is provided at the inlet of the flue gas inlet pipe, and a detachable monitoring assembly is provided on the outer wall of the heat exchanger body, the monitoring assembly including a pressure sensor for real-time monitoring of the internal pressure changes of the heat exchanger body.

[0005] Furthermore, the side wall of the heat exchanger body is provided with a threaded pipe that communicates with the interior. The monitoring component includes a threaded post that is threadedly connected to the threaded pipe. The pressure sensor is located on the bottom end face of the threaded post, and a knob is provided on the top of the threaded post to facilitate quick disassembly and replacement of the pressure sensor and simplify maintenance operations.

[0006] Furthermore, the side wall of the smoke inlet pipe is provided with a through groove, and the filter assembly includes a pull-out plate and an insert plate that can be inserted into the through groove. The insert plate is fixed to the bottom of the pull-out plate and is connected to a filter plate, which facilitates cleaning or replacement of the filter plate and reduces smoke and dust blockage.

[0007] Furthermore, the pull-out plate is fixed to the outer wall of the smoke inlet pipe by bolts, and the filter plate is provided with a removable filter screen, which is convenient for disassembling and cleaning the filter screen and maintaining the filtration efficiency.

[0008] Furthermore, the bottom of the heat exchanger body is equipped with casters, the side wall is equipped with push handles, and the surface of the heat exchanger body is equipped with an openable and closable sealed door, which facilitates the movement of the equipment and the maintenance of the equipment interior, thereby improving portability.

[0009] Furthermore, an exhaust fan is connected to the inlet of the flue pipe, and an exhaust valve is installed on the exhaust pipe to optimize flue gas flow control and improve heat recovery efficiency.

[0010] Furthermore, the heat pipe is fixed inside the heat recovery exchanger body by a pipe clamp. The pipe clamp ensures stable installation of the heat pipe and prevents displacement during operation.

[0011] Compared with the prior art, this utility model has the following advantages:

[0012] 1. The internal air pressure changes are monitored in real time by the air pressure sensor in the monitoring component. Combined with the detachable structure design of the threaded tube, the monitoring component can be quickly disassembled and replaced. At the same time, the monitoring component and the alarm light are connected to the alarm light through an external control system. Once a leak occurs, the alarm light will be triggered.

[0013] 2. The pull-out plate and filter plate in the filter assembly can intercept smoke and dust, reduce heat pipe corrosion, and the casters, sealing door and push handle facilitate movement and maintenance, reducing mechanical wear. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the internal structure of the present invention;

[0015] Figure 2 This is the left view of the present invention;

[0016] Figure 3 for Figure 1 Enlarged view of point A in the middle;

[0017] Figure 4 for Figure 1 Enlarged view of section B in the middle.

[0018] The reference numerals in the accompanying drawings include:

[0019] 1-Recovery heat exchanger body, 11-Heat pipe, 111-Inlet, 112-Outlet, 113-Pipe clamp, 12-Flue gasket, 121-Exhaust fan, 122-Sealing gasket, 13-Flue gasket, 131-Exhaust valve, 14-Handle, 15-Wheel caster, 16-Alarm light, 17-Sealed door, 18-Threaded pipe, 2-Filter assembly, 21-Pull-out plate, 22-Insert plate, 221-Filter plate, 23-Bolt, 24-Handle, 3-Monitoring assembly, 31-Knob, 32-Threaded column, 321-Pressure sensor. Detailed Implementation

[0020] To enable those skilled in the art to better understand this utility model, the technical solution of this utility model will be further described below in conjunction with the accompanying drawings and embodiments.

[0021] The accompanying drawings are for illustrative purposes only and are schematic diagrams, not actual images. They should not be construed as limiting the scope of this patent. To better illustrate the embodiments of this utility model, some components in the drawings may be omitted, enlarged, or reduced, and do not represent the actual dimensions of the product. It is understandable to those skilled in the art that some well-known structures and their descriptions may be omitted in the drawings.

[0022] In the accompanying drawings of this utility model, the same or similar reference numerals correspond to the same or similar components. In the description of this utility model, it should be understood that if terms such as "upper," "lower," "left," "right," "inner," and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, they are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the terms used to describe positional relationships in the drawings are only for illustrative purposes and should not be construed as limiting this patent. For those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances.

[0023] In the description of this utility model, unless otherwise explicitly specified and limited, the term "connection" or similar designation indicating the connection relationship between components should be interpreted broadly. For example, it can refer to a fixed connection, a detachable connection, or an integral part; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can refer to the internal communication of two components or the interaction between 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.

[0024] like Figure 1-4 As shown, this utility model discloses a flue gas waste heat recovery heat exchanger with a leak detection structure, including a heat exchanger body 1. A heat conduction pipe 11 is provided inside the heat exchanger body 1. The heat conduction pipe 11 includes an inlet 111 and an outlet 112 extending out of the internal body of the heat exchanger body 1. The heat exchanger body 1 also includes a flue gas inlet pipe 12 and a flue gas outlet pipe 13. A filter assembly 2 for intercepting flue gas dust is provided at the inlet of the flue gas inlet pipe 12. A detachable monitoring assembly 3 is provided on the outer wall of the heat exchanger body 1. The monitoring assembly 3 includes a pressure sensor 321 for real-time monitoring of the internal air pressure changes of the heat exchanger body 1.

[0025] Reference Figure 1 and Figure 4 The heat exchanger body 1 has a threaded pipe 18 connected to the interior on its side wall. The monitoring component 3 includes a threaded post 32 that is threaded to the threaded pipe 18. A pressure sensor 321 is located on the bottom end face of the threaded post 32. A knob 31 is located on the top of the threaded post 32. After the threaded post 32 is threaded to the threaded pipe 18 by the knob 31, the pressure sensor 321 is directly exposed in the inner cavity of the heat exchanger body 1 after the threaded post 32 is fully screwed in, as it is located on the bottom end face of the threaded post 32. This is used to monitor the internal pressure change of the heat exchanger body 1. The pressure sensor 321 is connected to an external terminal and transmits the monitoring data back to the control terminal in real time. When the pressure is different from the preset value (gas leakage occurs in the heat exchanger body 1), the control terminal sends a control signal to trigger the alarm light 16 on the top of the heat exchanger body 1 to light up red.

[0026] Reference Figure 1 and Figure 3 The side wall of the smoke inlet pipe 12 is provided with a through groove. The filter assembly 2 includes a pull-out plate 21 and an insert plate 22 that can be inserted into the through groove. The insert plate 22 is fixed to the bottom of the pull-out plate 21. The insert plate 22 is connected to the filter plate 221. The insert plate 22 of the filter assembly 2 is inserted into the through groove of the side wall of the smoke inlet pipe 12 in a horizontal direction. The side wall of the through groove is provided with a sealing gasket 122. The filter plate 221 is fixed to the lower surface of the insert plate 22 (after the insert plate 22 is inserted, the filter plate 221 is parallel to the inlet of the smoke inlet pipe 12), so that the flue gas is intercepted when it passes through the filter plate 221.

[0027] Reference Figure 3 The pull-out plate 21 is fixed to the outer wall of the smoke inlet pipe 12 by bolts 23. The filter plate 221 is provided with a detachable filter screen. The bolts 23 pass through the pull-out plate 21 and are screwed into the pre-set threaded holes on the outer wall of the smoke inlet pipe 12, thereby pressing and fixing the pull-out plate 21 to the outer wall of the smoke inlet pipe 12. The detachable filter screen covers and is fixed to the windward side of the filter plate 221.

[0028] Reference Figure 1and Figure 2 The bottom of the heat exchanger body 1 is provided with casters 15, the side wall is provided with push handles 14, and the surface of the heat exchanger body 1 is provided with a sealable door 17 that can be opened and closed.

[0029] Reference Figure 1 A fan 121 is connected to the inlet of the smoke inlet pipe 12, and an exhaust valve 131 is installed on the smoke exhaust pipe 13. The exhaust valve 131 is vertically installed on the pipe wall of the smoke exhaust pipe 13 and is used to control the opening and closing of the smoke exhaust pipe 13.

[0030] Reference Figure 1 The heat pipe 11 is fixed inside the heat recovery heat exchanger body 1 by the pipe clamp 113.

[0031] The working principle of this utility model is as follows: The exhaust fan 121 is started, and an external water source is connected to the inlet 111 via a water pump or other pumping device. When the high-temperature flue gas enters through the inlet pipe 12 under the suction of the exhaust fan 121, it first passes through the filter plate 221 of the filter assembly 2. The filter screen on the filter plate 221 intercepts the dust particles, and the purified flue gas enters the body of the heat exchanger 1. The flue gas exchanges heat with the heat-conducting pipe 11, transferring heat to the water flowing inside the heat-conducting pipe 11. The water absorbs the heat and flows out from the outlet 112. The low-temperature flue gas, having completed the heat exchange, is discharged through the exhaust pipe 13, and the exhaust flow rate is adjusted by controlling the exhaust valve 131. The air pressure sensor 321 of the monitoring component 3 continuously monitors the internal air pressure of the recovery heat exchanger body 1 during the heat exchange process. When a leak occurs (such as a rupture of the heat pipe 11 or a sealing problem in the shell of the recovery heat exchanger body 1) causing abnormal air pressure, the external control terminal is triggered to make the alarm light 16 alarm. The equipment can be moved to the maintenance area by the push handle 14 and the caster wheel 15, and the sealed door 17 can be opened for internal maintenance.

[0032] The above are merely embodiments of this utility model. The circuits, electronic components, and modules involved are all prior art, fully achievable by those skilled in the art, and require no further explanation. The content protected by this application does not involve improvements to the software or methods. Commonly known structures and characteristics in the solution are not described in detail here. Those skilled in the art are aware of all common technical knowledge in the field to which this utility model pertains prior to the application date or priority date, are able to access all existing technologies in that field, and possess the ability to apply conventional experimental methods prior to that date. Those skilled in the art can, under the guidance of this application, improve and implement this solution in conjunction with their own capabilities. Some typical known structures or methods should not be obstacles for those skilled in the art to implement this application. It should be noted that those skilled in the art can make several modifications and improvements without departing from the structure of this utility model. These should also be considered within the scope of protection of this utility model, and will not affect the effectiveness of the implementation of this utility model or the practicality of the patent.

Claims

1. A flue gas waste heat recovery heat exchanger with a leak detection structure, characterized in that: The invention includes a heat exchanger body (1), characterized in that: a heat-conducting pipe (11) is provided inside the heat exchanger body (1), the heat-conducting pipe (11) includes an inlet (111) and an outlet (112) extending out of the internal body of the heat exchanger body (1), the heat exchanger body (1) also includes a flue pipe (12) and a flue pipe (13), a filter assembly (2) for intercepting smoke and dust is provided at the inlet of the flue pipe (12), and a detachable monitoring assembly (3) is provided on the outer wall of the heat exchanger body (1), the monitoring assembly (3) includes a pressure sensor (321) for real-time monitoring of the internal pressure change of the heat exchanger body (1).

2. The flue gas waste heat recovery heat exchanger with leak detection structure according to claim 1, characterized in that: The heat recovery heat exchanger body (1) has a threaded pipe (18) communicating with the interior on its side wall. The monitoring component (3) includes a threaded post (32) threadedly connected to the threaded pipe (18). The air pressure sensor (321) is located on the bottom end face of the threaded post (32). A knob (31) is located on the top of the threaded post (32).

3. A flue gas waste heat recovery heat exchanger with a leak detection structure according to claim 1, characterized in that: The side wall of the smoke inlet pipe (12) is provided with a through groove. The filter assembly (2) includes a pull plate (21) and an insert plate (22) that can be inserted into the through groove. The insert plate (22) is fixed to the bottom of the pull plate (21) and the insert plate (22) is connected to the filter plate (221).

4. A flue gas waste heat recovery heat exchanger with a leak detection structure according to claim 3, characterized in that: The pull-out plate (21) is fixed to the outer wall of the smoke inlet pipe (12) by bolts (23), and a detachable filter screen is provided on the filter plate (221).

5. A flue gas waste heat recovery heat exchanger with a leak detection structure according to claim 1, characterized in that: The bottom of the heat recovery heat exchanger body (1) is provided with casters (15), the side wall is provided with push handles (14), and the surface of the heat recovery heat exchanger body (1) is provided with a sealable door (17) that can be opened and closed.

6. A flue gas waste heat recovery heat exchanger with a leak detection structure according to claim 1, characterized in that: A blower (121) is connected to the inlet of the smoke inlet pipe (12), and an exhaust valve (131) is installed on the smoke exhaust pipe (13).

7. A flue gas waste heat recovery heat exchanger with a leak detection structure according to claim 1, characterized in that: The heat pipe (11) is fixed inside the heat recovery heat exchanger body (1) by a pipe clamp (113).

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