Waste heat recycling device of flue gas waste heat recovery boiler

Abstract

The utility model relates to the field of boiler waste heat recovery equipment, in particular to a waste heat recycling device of a flue gas waste heat recovery boiler, which comprises a boiler body and a filter component. The filter assembly comprises a shell, a mounting seat, a filter seat, a connecting pipe, a cleaning component and a recycling component, the shell is fixedly connected with the boiler body, the mounting seat is fixedly connected with the shell, the filter seat is rotatably connected with the mounting seat, and the connecting pipe is fixedly connected with the mounting seat. Smoke firstly penetrates through the smoke inlet in the mounting seat, then is filtered by the filter seat and then enters the shell, finally the smoke is introduced into the recovery component through the connecting pipe, and waste heat in the smoke is recovered through the recovery component, so that the smoke is filtered, and the smoke is prevented from being attached to the interior of the recovery component to influence the heat transfer efficiency.

Description

Technical Field

[0001] The utility model relates to the field of boiler waste heat recovery equipment, in particular to a flue gas waste heat recovery boiler waste heat reuse device. Background Art

[0002] Boiler is an energy conversion device. The energy input to the boiler includes chemical energy and electrical energy in the fuel. The boiler outputs steam, high-temperature water or organic heat carrier with a certain amount of thermal energy. The exhaust temperature of the boiler is generally between 120℃ and 350℃. 7% to 25% of the sensible heat and 15% of the latent heat in the flue gas are not used and are directly discharged into the atmosphere. This not only causes a large amount of energy waste but also aggravates the thermal pollution of the environment.

[0003] Prior art CN209840143U discloses a boiler waste heat recovery device, including a boiler body, a flue gas exhaust pipe is arranged on the boiler body, a flue gas waste heat recovery device is fixedly installed on the flue gas exhaust pipe, the flue gas waste heat recovery device includes an air inlet and an air outlet, a heat exchange tube is arranged in the flue gas waste heat recovery device, the input end of the heat exchange tube is connected to a low-temperature liquid tube, and the output end of the heat exchange tube is connected to a high-temperature liquid tube. This device is used to recycle the waste heat in the flue gas discharged from the boiler, and use the high-temperature waste heat of the flue gas to heat low-temperature water, etc. The flue gas discharged from the boiler body reaches the flue gas waste heat recovery device through the flue gas exhaust pipe, and the low-temperature liquid pipe guides the cold water into the heat exchange tube in the flue gas waste heat recovery device, and then the waste heat in the flue gas is converted and transferred to the cold water in the heat exchange tube through the heat exchange tube, and the cold water is heated and discharged from the high-temperature liquid tube, and stored in the insulation bucket waiting for use.

[0004] The above device recovers waste heat from flue gas by heating water inside the heat exchange tubes with flue gas. However, flue gas contains a large amount of soot. Direct contact between flue gas and heat exchange tubes will cause a large amount of soot to adhere to the heat exchange tubes, affecting heat transfer efficiency. Utility Model Content

[0005] The utility model aims to provide a flue gas waste heat recovery boiler waste heat reuse device, which solves the problem that the existing boiler waste heat recovery device cannot filter the flue gas, and the direct contact of the flue gas with the heat exchange tube will cause a large amount of smoke ash to adhere to the heat exchange tube, affecting the heat transfer efficiency.

[0006] To achieve the above-mentioned purpose, the utility model provides a flue gas waste heat recovery boiler waste heat recycling device, including a boiler body and a filter assembly; the filter assembly includes an outer shell, a mounting seat, a filter seat, a connecting pipe, a cleaning component and a recovery component, the outer shell is fixedly connected to the boiler body, communicated with the boiler body, and is located on one side of the boiler body, the mounting seat is fixedly connected to the outer shell and is located inside the outer shell, the filter seat is rotatably connected to the mounting seat and is arranged on the mounting seat, the connecting pipe is fixedly connected to the mounting seat and passes through the outer shell, the cleaning component is arranged on the outer shell, and the recovery component is arranged on the connecting pipe.

[0007] Wherein, the cleaning component includes a rotating motor, a rotating shaft, a bottom plate and a cleaning brush, the rotating motor is connected to the outer shell and is located on one side of the outer shell; the rotating shaft is arranged on the rotating motor and is connected to the output end of the rotating motor; the bottom plate is fixedly connected to the rotating shaft and to the filter seat, and is located at one end of the rotating shaft; the cleaning brush is connected to the outer shell, abuts against the filter seat, and is arranged on the mounting seat.

[0008] Wherein, the cleaning brush includes a shell, a spring and a brush body, the shell is fixedly connected to the outer shell and is located inside the outer shell; the spring is connected to the shell and is located inside the shell; the brush body is connected to the spring and is located at one end of the spring.

[0009] Wherein, the filter assembly further comprises a sealing door, which is rotatably connected to the outer shell and is arranged on the outer shell.

[0010] Wherein, the recovery component includes a heat exchange box and a heat exchange pipe, the heat exchange box is fixedly connected to the connecting pipe, communicated with the connecting pipe, and located on one side of the connecting pipe; the heat exchange pipe is fixedly connected to the heat exchange box and located inside the heat exchange box.

[0011] The utility model discloses a waste heat recycling device for a flue gas waste heat recovery boiler. When in use, the boiler body discharges flue gas from the flue pipe to the outer shell. The flue gas first passes through the smoke inlet on the mounting seat, and then enters the outer shell after being filtered by the filter seat. Finally, the flue gas is passed into the recovery component through the connecting pipe, and the waste heat in the flue gas is recovered by the recovery component. The recovered flue gas is finally discharged through the recovery component, thereby realizing the recovery of the waste heat in the flue gas. Before the flue gas enters the recovery component, the flue gas is filtered by the filter seat so that the soot in the flue gas cannot enter the recovery component. At the same time, the cleaning component can clean the soot attached to the filter seat so that the soot can fall into the bottom of the outer shell for collection, thereby avoiding the filter seat from being blocked due to long-term filtering and affecting the circulation of the flue gas, thereby realizing the filtering of the flue gas and avoiding the soot from being attached to the inside of the recovery component and affecting the heat transfer efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art are briefly introduced below.

[0013] Figure 1 It is a schematic diagram of the overall structure of a flue gas waste heat recovery boiler waste heat recycling device in the first embodiment of the utility model.

[0014] Figure 2 It is a structural schematic diagram of a cleaning component of the first embodiment of the utility model.

[0015] Figure 3 It is a schematic diagram of the installation structure of the filter seat of the first embodiment of the utility model.

[0016] Figure 4 The first embodiment of the utility model Figure 3 Enlarged view of point A.

[0017] Figure 5 It is a schematic diagram of the installation structure of the heat exchange tube of the second embodiment of the utility model.

[0018] In the figure: 101-boiler body, 102-filter assembly, 103-housing, 104-mounting seat, 105-filter seat, 106-connecting pipe, 107-cleaning component, 108-recovery component, 109-rotating motor, 110-rotating shaft, 111-bottom plate, 112-cleaning brush, 113-housing, 114-spring, 115-brush body, 116-sealing door, 201-heat exchange box, 202-heat exchange tube. DETAILED DESCRIPTION

[0019] Embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, but should not be understood as limiting the present invention.

[0020] First embodiment:

[0021] See also Figures 1 to 4 ,in Figure 1 It is the overall structural diagram of the flue gas waste heat recovery boiler waste heat reuse device. Figure 2 It is a schematic diagram of the structure of the cleaning component. Figure 3 This is a schematic diagram of the installation structure of the filter seat. Figure 4 yes Figure 3 Enlarged view of point A.

[0022] The utility model provides a flue gas waste heat recovery boiler waste heat recycling device, including a boiler body 101 and a filter assembly 102, the filter assembly 102 includes a shell 103, a mounting seat 104, a filter seat 105, a connecting pipe 106, a cleaning component 107, a recovery component 108 and a sealing door 116, the cleaning component 107 includes a rotating motor 109, a rotating shaft 110, a bottom plate 111 and a cleaning brush 112, the cleaning brush 112 includes a shell 113, a spring 114 and a brush body 115, the flue gas entering the shell 103 is filtered through the filter seat 105 to prevent the soot from entering the recovery component 108 and affecting the heat exchange efficiency. It can be understood that the above scheme can be used when filtering the soot in the flue gas, and can also be used to solve the problem of cleaning the filter seat 105.

[0023] According to this specific embodiment, a smoke exhaust pipe is provided on one side of the boiler body 101 for exhausting smoke.

[0024] The shell 103 is fixedly connected to the boiler body 101, communicated with the boiler body 101, and is located on one side of the boiler body 101. The mounting seat 104 is fixedly connected to the shell 103 and is located inside the shell 103. The filter seat 105 is rotatably connected to the mounting seat 104 and is arranged on the mounting seat 104. The connecting pipe 106 is fixedly connected to the mounting seat 104 and passes through the shell 103. The cleaning component 107 is arranged on the shell 103. The recovery component 108 is arranged on the connecting pipe 106. The filter seat 105 is annular. A smoke inlet is arranged on the mounting seat 104, so that the smoke can enter the shell 103 through the smoke inlet on the mounting seat 104, and the smoke entering the shell 103 is filtered by the filter seat 105. When in use, the boiler body 101 discharges smoke from the smoke exhaust pipe to the The smoke first passes through the smoke inlet on the mounting seat 104, and then enters the housing 103 after being filtered by the filter seat 105, and finally passes the smoke into the recovery component 108 through the connecting pipe 106, and the residual heat in the smoke is recovered by the recovery component 108. The smoke after heat recovery is finally discharged through the recovery component 108, thereby realizing the recovery of residual heat in the smoke. Before entering the recovery component 108, the smoke is filtered by the filter seat 105, so that the smoke ash in the smoke cannot enter the recovery component 108. At the same time, the cleaning component 107 can clean the smoke ash attached to the filter seat 105, so that the smoke ash can fall into the bottom of the housing 103 for collection, so as to avoid the filter seat 105 from being blocked due to long-term filtering, which affects the circulation of the smoke, thereby filtering the smoke and avoiding the smoke ash from adhering to the inside of the recovery component 108 and affecting the heat transfer efficiency.

[0025] Secondly, the rotating motor 109 is connected to the housing 103 and is located at one side of the housing 103; the rotating shaft 110 is arranged on the rotating motor 109 and is connected to the output end of the rotating motor 109; the bottom plate 111 is fixedly connected to the rotating shaft 110 and is fixedly connected to the filter seat 105 and is located at one end of the rotating shaft 110; the cleaning brush 112 is connected to the housing 103, abuts against the filter seat 105, and is arranged on the mounting seat 104. Two cleaning brushes 112 are provided and are respectively located on both sides of the smoke inlet on the mounting seat 104. The rotating motor 109 drives the rotating shaft 110 and the bottom plate 111 to rotate, so that the bottom plate 111 drives the filter seat 105 to rotate, so that the cleaning brush 112 can brush through the surface of the filter seat 105, brush off the ash attached to the surface of the filter seat 105, and achieve the purpose of cleaning the filter seat 105 and avoiding clogging of the filter seat 105.

[0026] At the same time, the shell 113 is fixedly connected to the outer shell 103 and is located inside the outer shell 103; the spring 114 is connected to the shell 113 and is located inside the shell 113; the brush body 115 is connected to the spring 114 and is located at one end of the spring 114. The spring 114 applies force to the brush body 115, so that the brush body 115 and the filter seat 105 are more closely abutted, thereby improving the cleaning effect of the cleaning brush 112 on the filter seat 105.

[0027] In addition, the sealing door 116 is rotatably connected to the outer shell 103 and is arranged on the outer shell 103. The outer shell 103 is provided with an exhaust port for discharging the cleaned ash. The sealing door 116 is installed at the exhaust port to seal the exhaust port. When the filter assembly 102 is used for a long time, the staff opens the sealing door 116 and takes out the ash accumulated inside the outer shell 103 from the exhaust port for cleaning, thereby facilitating the staff to clean the ash.

[0028] When the flue gas waste heat recovery boiler waste heat recycling device of this embodiment is used, the flue gas generated by the boiler body 101 enters the outer shell 103 through the smoke exhaust pipe. In the process of entering the outer shell 103, the flue gas is filtered by the filter seat 105. The filtered flue gas enters the recovery component 108 through the connecting pipe 106 to recover heat. At the same time, the rotating shaft 110 and the bottom plate 111 are driven to rotate by the rotating motor 109, so that the bottom plate 111 drives the filter seat 105 to rotate. During the rotation of the filter seat 105, the cleaning brush 112 brushes off the soot attached to the surface of the filter seat 105, thereby cleaning the filter seat 105 to avoid clogging of the filter seat 105, thereby filtering the flue gas and avoiding soot adhering to the inside of the recovery component 108 to affect the heat transfer efficiency.

[0029] Second embodiment:

[0030] Based on the first embodiment, please refer to Figure 5 , Figure 5 2 is a schematic diagram of the installation structure of the heat exchange tube of the second embodiment. The recovery component 108 of this embodiment includes a heat exchange box 201 and a heat exchange tube 202 .

[0031] According to the present specific embodiment, the heat exchange box 201 is fixedly connected to the connecting pipe 106, communicated with the connecting pipe 106, and is located on one side of the connecting pipe 106; the heat exchange tube 202 is fixedly connected to the heat exchange box 201, and is located inside the heat exchange box 201. An insulation layer is arranged outside the heat exchange box 201 to prevent heat loss in the flue gas. The heat exchange tube 202 is spiral, and is provided with a water inlet at the bottom and a water outlet at the top. A smoke exhaust port is arranged at the top of the heat exchange box 201. The smoke enters the shell 103 after being filtered by the filter seat 105, and then enters the heat exchange box 201 through the connecting pipe 106. At this time, cold water is transported to the water inlet at the bottom of the heat exchange tube 202 through an external water pipe, and the cold water in the heat exchange tube 202 is heated by the heat of the flue gas. The heated water is discharged through the water outlet at the top of the heat exchange tube 202, thereby realizing the purpose of recovering the waste heat in the flue gas.

[0032] What is disclosed above is only one or more preferred embodiments of the present application, and cannot be used to limit the scope of rights of the present application. Ordinary technicians in this field can understand that all or part of the processes of implementing the above embodiments and equivalent changes made according to the claims of the present application are still within the scope covered by the present application.

Claims

1. A flue gas waste heat recovery boiler waste heat recycling device, comprising a boiler body, characterized in that: Also included is a filtration component; The filter assembly includes an outer shell, a mounting seat, a filter seat, a connecting pipe, a cleaning component and a recovery component. The outer shell is fixedly connected to the boiler body, communicated with the boiler body, and is located on one side of the boiler body. The mounting seat is fixedly connected to the outer shell and is located inside the outer shell. The filter seat is rotatably connected to the mounting seat and is arranged on the mounting seat. The connecting pipe is fixedly connected to the mounting seat and passes through the outer shell. The cleaning component is arranged on the outer shell, and the recovery component is arranged on the connecting pipe.

2. The flue gas waste heat recovery boiler waste heat recycling device according to claim 1, characterized in that: The cleaning component includes a rotating motor, a rotating shaft, a bottom plate and a cleaning brush. The rotating motor is connected to the outer shell and is located at one side of the outer shell; the rotating shaft is arranged on the rotating motor and is connected to the output end of the rotating motor; the bottom plate is fixedly connected to the rotating shaft and to the filter seat and is located at one end of the rotating shaft; the cleaning brush is connected to the outer shell, abuts against the filter seat, and is arranged on the mounting seat.

3. The flue gas waste heat recovery boiler waste heat recycling device according to claim 2, characterized in that: The cleaning brush comprises a shell, a spring and a brush body. The shell is fixedly connected to the outer shell and is located inside the outer shell; the spring is connected to the shell and is located inside the shell; the brush body is connected to the spring and is located at one end of the spring.

4. The flue gas waste heat recovery boiler waste heat recycling device according to claim 1, characterized in that: The filter assembly also includes a sealing door, which is rotatably connected to the outer shell and is arranged on the outer shell.

5. The flue gas waste heat recovery boiler waste heat recycling device according to claim 1, characterized in that: The recovery component includes a heat exchange box and a heat exchange pipe. The heat exchange box is fixedly connected to the connecting pipe, communicated with the connecting pipe, and located on one side of the connecting pipe; the heat exchange pipe is fixedly connected to the heat exchange box and located inside the heat exchange box.

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