Boiler flue gas waste heat recycling device

Abstract

The utility model provides a boiler flue gas waste heat recycling device, and belongs to the technical field of boiler flue gas recycling. Comprising a main body, a fixed mounting frame is fixed to the periphery of the main body, a lower connecting mounting frame is fixed to the lower portion of the main body, a smoke inlet pipe is fixed to the upper portion of one side of the lower connecting mounting frame, a filtering frame is mounted on the upper portion of the interior of the lower connecting mounting frame, and an activated carbon filtering frame is mounted on the lower portion of the interior of the lower connecting mounting frame; and one side of the lower connecting frame and one side below the main body are connected with transition pipes. Through the arrangement of the cleaning mechanism, a worker connects the smoke inlet pipe with the boiler in advance and then starts the sucking pump; during operation, hot flue gas in a boiler can be guided into the lower connecting frame, is doubly filtered by the filter frame and the activated carbon filter frame and then is input into the main body through the two transition pipes to perform heat exchange treatment on flowing water in the heat exchange water pipe, and the filter frame can filter impurities and dust in the flue gas; and the activated carbon filter frame can filter peculiar smell and corresponding harmful pollutants.

Description

Technical Field

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

[0002] A 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 flue gas generated by the combustion of fuel in the boiler has a certain temperature. If it is discharged directly, it will lead to waste. The heat of the flue gas needs to be used through a heat recovery device.

[0003] For example, patent CN215175193U discloses a waste heat recovery and utilization device for flue gas of a power station boiler, comprising a boiler and a chimney connected to each other, wherein a plurality of interconnected serpentine heat exchange tubes are provided in the chimney, wherein the upper end of the serpentine heat exchange tube is connected to a first water pipe passing through the side wall of the upper end of the chimney, the other end of the first water pipe is connected to a first water pump in a cooling tower, the lower end of the serpentine heat exchange tube is connected to a second water pipe passing through the side wall of the lower end of the chimney, the other end of the second water pipe is connected to a water storage tank, the water storage tank is connected to a second water pump, the second water pump is connected to a third water pipe, the third water pipe is connected to a shell and tube heat exchanger on the boiler air duct, the water outlet of the shell and tube heat exchanger is connected to the cooling tower through a fourth water pipe provided with a third water pump, the air inlet side of the shell and tube heat exchanger is connected to a blower, and the air outlet side is connected to the air inlet of the boiler.

[0004] During use, the above-mentioned recovery and utilization device does not have a corresponding filtering mechanism to filter out impurities such as soot in the boiler flue gas, which causes the above-mentioned impurities to adhere to the outer surface of the heat exchange tube. Over time, it will cause the outer wall to agglomerate, thereby affecting the normal heat exchange efficiency and effect of the heat exchange tube. Therefore, this application provides a boiler flue gas waste heat recovery and utilization device to meet the needs. Utility Model Content

[0005] The technical problem to be solved by the utility model is to provide a boiler flue gas waste heat recovery and utilization device to solve the problem that there is no corresponding filtering mechanism to filter impurities such as soot in the boiler flue gas, which causes the above impurities to adhere to the outer surface of the heat exchange tube, and over time causes the outer wall to agglomerate, thereby affecting the normal heat exchange efficiency and effect of the heat exchange tube.

[0006] In order to solve the above technical problems, the present invention provides the following technical solutions:

[0007] A boiler flue gas waste heat recovery and utilization device comprises a main body, a fixed mounting frame is fixed on the periphery of the main body, and a lower connecting frame is fixed below the main body, a smoke inlet pipe is fixed above one side of the lower connecting frame, and a filter frame is installed above the interior of the lower connecting frame, an activated carbon filter frame is installed below the interior of the lower connecting frame, and a transition pipe is connected to one side of the lower connecting frame and one side below the main body, an air pump is installed at the opposite ends of the two transition pipes, a cleaning mechanism is installed inside and on one side of the lower connecting frame, and the cleaning mechanism includes an inner mounting frame and a guide frame. The end of the guide frame is connected to a mounting frame, and a collection component is installed inside the mounting frame. A smoke outlet pipe is fixed on the upper side of the main body, and a hot water exchange pipe is installed inside the main body. One end of the hot water exchange pipe is connected to a water pump, and the other end of the water pump is connected to a water inlet pipe. A temperature-slowing mechanism is distributed inside the main body, and a temperature sensor is installed on one side of the bottom end of the main body. The internal frames are arranged on both sides of the interior of the lower connecting frame, and cleaning components are installed inside and on the inner side of the two internal frames. A lifting component is installed above one side of the lower connecting frame.

[0008] Optionally, the cleaning assembly includes a transmission screw, and the transmission screw is installed inside one of the internal frames, one end of the transmission screw is connected to a motor, and a screw sleeve is screwed around one side of the transmission screw, a connecting frame is fixed on the inner side of the screw sleeve, and a scraper is fixed to the bottom end of the connecting frame, the other end of the connecting frame is connected to a guide sleeve, and a guide rod is fixed inside the other internal frame.

[0009] Optionally, the guide rod and the guide sleeve are connected by a sliding guide.

[0010] Optionally, the lifting assembly includes a connecting side frame, and the connecting side frame is fixed to one side of the lower connecting frame. A slot is provided in the middle of the connecting side frame, and a plug-in plate is inserted in the middle of the slot. A side slot is provided above the side of the lower connecting frame, and an electric push rod is installed inside the side slot. The end of the connecting side frame is connected to a guide frame.

[0011] Optionally, the extended end of the electric push rod is fixedly connected to the plug plate, and the plug plate and the slot are matched in size.

[0012] Optionally, the connecting side frames are distributed in an inclined manner, and the connecting side frames, the guide frames and the mounting frames are connected to each other adjacently.

[0013] Optionally, the collection assembly includes sliding blocks, and the sliding blocks are symmetrically fixed on both sides of the interior of the mounting frame. A collection box is installed inside the mounting frame, and sliding grooves are provided on both sides of the collection box. A handle is fixed to the front end of the collection box.

[0014] Optionally, the sliding grooves provided on both sides of the collecting box and the sliding blocks provided on both sides of the interior of the mounting frame are connected by sliding guides.

[0015] Optionally, the temperature-slowing mechanism includes an annular plate, and the annular plate is distributed inside the main body, and surfaces of the plurality of annular plates are provided with annular grooves, and one side of the plurality of annular plates is provided with a preset groove.

[0016] Optionally, the preset groove is used for inserting irregular sections of the hot water exchange pipe.

[0017] Compared with the prior art, the present invention has at least the following beneficial effects:

[0018] In the above scheme, by providing a cleaning mechanism, the operator pre-connects the smoke inlet pipe to the boiler and then activates the vacuum pump. This operation directs the hot flue gas from the boiler into the lower connecting frame, where it is dual-filtered by the filter rack and activated carbon filter rack. After being fed through two transition pipes, it is then transferred to the main body for heat exchange treatment of the flowing water in the hot water exchange pipe. The filter rack filters impurities and dust from the flue gas, while the activated carbon filter rack filters odors and corresponding harmful pollutants. After the filter rack has filtered for a certain period of time, or when the temperature sensor in the main body indicates a temperature difference, the operator activates the motor to rotate the transmission screw. The screw sleeve interacting with the screw will then carry the connecting frame and scraper, guided by the guide sleeve and guide rod, to perform a close-fitting scraping along the partition surface of the filter rack, pushing impurities to the connection port of the connecting side frame. At this point, the electric push rod is activated, causing the plug in the middle of the slot in the connecting side frame to rise, allowing the impurities to be guided by the connecting guide rack at the end of the connecting side frame and enter the collection box in the mounting frame. This simple and convenient cleaning process does not affect subsequent waste heat utilization operations.

[0019] By setting up a collection component, when the collection box is full of impurities and dust, a person can hold the handle to make it detach from the mounting frame by utilizing the mobility of the slide groove and the sliding block to carry out cleaning operations.

[0020] By setting up a temperature-reducing mechanism, when the flue gas enters the main body, in order to avoid the flue gas temperature losing too quickly, the multiple groups of ring plates distributed in the main body and the ring grooves on their surfaces can effectively slow down the flow rate of the hot gas, thereby ensuring that the hot water pipe area between each two ring plates can be evenly heated by the hot gas, thereby improving the heat exchange efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The accompanying drawings, which are incorporated herein and constitute part of the specification, illustrate embodiments of the invention and, together with the description, further serve to explain the principles of the invention and enable those skilled in the relevant art to make and use the invention.

[0022] Figure 1 This is a schematic diagram of the three-dimensional structure of a boiler flue gas waste heat recovery and utilization device;

[0023] Figure 2This is a schematic diagram of the internal structure of a boiler flue gas waste heat recovery and utilization device;

[0024] Figure 3 This is a schematic diagram of the internal structure of the lower mounting frame of the boiler flue gas waste heat recovery and utilization device;

[0025] Figure 4 This is a schematic diagram of the partial upward structural view of the cleaning components of the boiler flue gas waste heat recovery and utilization device.

[0026] [reference numerals]

[0027] 1. Main body; 2. Fixed frame; 3. Lower connecting frame; 4. Smoke inlet pipe; 5. Filter frame; 6. Activated carbon filter frame; 7. Transition pipe; 8. Vacuum pump; 9. Cleaning mechanism; 91. Internal frame; 92. Cleaning assembly; 921. Drive screw; 922. Motor; 923. Screw sleeve; 924. Connecting frame; 925. Scraper; 926. Guide sleeve; 927. Guide rod; 93. Lifting assembly; 931. Connecting side frame; 932. Slot; 933, plug-in board; 934, side slot; 935, electric push rod; 936, guide frame; 10, mounting frame; 11, collection assembly; 111, sliding block; 112, collection box; 113, slide; 114, handle; 12, smoke exhaust pipe; 13, hot water exchange pipe; 14, water pump; 15, water inlet pipe; 16, temperature relief mechanism; 161, ring plate; 162, ring slot; 163, preset slot; 17, temperature sensor.

[0028] As shown in the figure, in order to clearly implement the structure of the embodiment of the present invention, specific structures and devices are marked in the figure, but this is only for illustrative purposes and is not intended to limit the present invention to the specific structure, devices and environment. According to specific needs, ordinary technicians in this field can adjust or modify these devices and environments. DETAILED DESCRIPTION

[0029] The following describes in detail a boiler flue gas waste heat recovery and utilization device provided by the present invention, in conjunction with the accompanying drawings and specific embodiments. It is also noted that, to provide a more detailed description, the following embodiments are best and preferred embodiments, and those skilled in the art may also adopt other alternative implementations for some known technologies. Furthermore, the accompanying drawings are only for the purpose of describing the embodiments in more detail and are not intended to limit the present invention to any specific extent.

[0030] It should be noted that references in the specification to "one embodiment," "an embodiment," "an exemplary embodiment," "some embodiments," etc. indicate that the described embodiments may include specific features, structures, or characteristics, but not every embodiment necessarily includes such specific features, structures, or characteristics. In addition, when specific features, structures, or characteristics are described in conjunction with an embodiment, it is within the knowledge of persons skilled in the relevant art to implement such features, structures, or characteristics in conjunction with other embodiments (whether or not explicitly described).

[0031] In general, terms can be understood, at least in part, from their use in context. For example, depending at least in part on the context, the term "one or more" as used herein can be used to describe any feature, structure, or characteristic in the singular sense, or can be used to describe a combination of features, structures, or characteristics in the plural sense. Additionally, the term "based on" can be understood as not necessarily intended to convey an exclusive set of factors, but can instead, depending at least in part on the context, allow for the presence of other factors that are not necessarily explicitly described.

[0032] It will be understood that the meanings of “on,” “over,” and “above” in the present invention should be interpreted in the broadest manner, so that “on” means not only “directly on” something but also includes the meaning of being “on” something with intervening features or layers, and “on” or “above” means not only “on” or “above” something but also includes the meaning of being “on” or “above” something with no intervening features or layers.

[0033] Additionally, spatially relative terms such as "below," "beneath," "lower," "above," and "upper" may be used herein for descriptive convenience to describe the relationship of one element or feature to another element or features, as illustrated in the accompanying drawings. Spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the accompanying drawings. The device may be oriented in other ways, and the spatially relative descriptors used herein should be similarly interpreted accordingly.

[0034] like Figures 1 to 4As shown, the embodiment of the present invention provides a boiler flue gas waste heat recovery and utilization device, including a main body 1, a fixed frame 2 is fixed on the periphery of the main body 1, and a lower connecting frame 3 is fixed at the bottom of the main body 1, a smoke inlet pipe 4 is fixed on the upper side of one side of the lower connecting frame 3, and a filter frame 5 is installed on the upper part of the interior of the lower connecting frame 3, an activated carbon filter frame 6 is installed at the lower part of the interior of the lower connecting frame 3, and a transition pipe 7 is connected to one side of the lower connecting frame 3 and one side below the main body 1, an air pump 8 is installed at the opposite ends of the two transition pipes 7, a cleaning mechanism 9 is installed inside and on one side of the lower connecting frame 3, the cleaning mechanism 9 includes an inner frame 91 and a guide frame 936, and the end of the guide frame 936 is connected to a mounting frame 10, a collecting component 11 is installed inside the mounting frame 10, and a fixed frame 91 is fixed on the upper side of the main body 1. There is a smoke outlet pipe 12, and a hot water exchange pipe 13 is installed inside the main body 1, one end of the hot water exchange pipe 13 is connected to a water pump 14, and the other end of the water pump 14 is connected to a water inlet pipe 15, a slow-temperature mechanism 16 is distributed inside the main body 1, and a temperature sensor 17 is installed on one side of the bottom end of the main body 1, the inner frame 91 is arranged on both sides of the interior of the lower connecting frame 3, and the interior and inner side of the two inner frames 91 are installed with a cleaning assembly 92, the cleaning assembly 92 includes a transmission screw 921, and the transmission screw 921 is installed inside one of the inner frames 91, one end of the transmission screw 921 is connected to a motor 922, and a screw sleeve 923 is screwed on the periphery of one side of the transmission screw 921, and a connecting frame 924 is fixed on the inner side of the screw sleeve 923, and the connecting frame A scraper 925 is fixed to the bottom end of 924, and a guide sleeve 926 is connected to the other end of the connecting frame 924. A guide rod 927 is fixed to the inside of another inner frame 91. The guide rod 927 and the guide sleeve 926 are connected in a sliding guide manner. A lifting assembly 93 is installed above one side of the lower connecting frame 3. The lifting assembly 93 includes a connecting side frame 931, and the connecting side frame 931 is fixed to one side of the lower connecting frame 3. A slot 932 is provided in the middle of the connecting side frame 931, and a plug-in plate 933 is inserted in the middle of the slot 932. The protruding end of the electric push rod 935 is fixedly connected to the plug-in plate 933, and the size of the plug-in plate 933 matches the slot 932. A side groove 934 is provided above the side of the lower connecting frame 3, and the inside of the side groove 934 is installed. The electric push rod 935 is connected to the end of the connecting side frame 931 with a guide frame 936. The connecting side frame 931 is distributed in an inclined manner, and the connecting side frame 931, the guide frame 936 and the mounting frame 10 are connected adjacent to each other. The staff pre-connects the smoke inlet pipe 4 to the boiler and then starts the suction pump 8. Under its operation, the hot flue gas in the boiler can be guided to the lower connecting frame 3 for double filtration by the filter frame 5 and the activated carbon filter frame 6. After that, it is input into the main body 1 through the two-section transition pipe 7 to perform heat exchange treatment on the flowing water in the hot water exchange pipe 13. Among them, the filter frame 5 can filter impurities and dust in the flue gas, while the activated carbon filter frame 6 can filter odors and corresponding harmful pollutants. When the filter frame 5 has been filtered for a certain period of time or the temperature sensor 17 in the main body 1 shows a temperature difference during heat exchange,The operator can start the motor 922 to rotate the transmission screw 921. At this time, the screw sleeve 923 that acts on the screw will carry the connecting frame 924 and the scraper 925, in conjunction with the guide sleeve 926 and the guide rod 927, to scrape the wall along the partition surface of the filter frame 5 in a close-fitting manner, thereby pushing the impurities to the connecting port of the connecting side frame 931. At this time, the electric push rod 935 is activated to cause the plug 933 in the middle of the slot 932 set in the connecting side frame 931 to rise, allowing the impurities to pass through the connecting guide 936 at the end of the connecting side frame 931 and enter the collection box 112 in the mounting frame 10. This simple and convenient cleaning process will not affect the subsequent waste heat utilization operation.

[0035] Among them, the collecting component 11 includes a sliding block 111, and the sliding block 111 is symmetrically fixed on both sides of the interior of the mounting frame 10. A collecting box 112 is installed inside the mounting frame 10, and a slide groove 113 is opened on both sides of the collecting box 112. A handle 114 is fixed to the front end of the collecting box 112. The slide grooves 113 opened on both sides of the collecting box 112 and the sliding blocks 111 provided on both sides of the interior of the mounting frame 10 are connected by sliding guides. When the collecting box 112 is full of impurities and dust, personnel can hold the handle 114 to use the mobility of the slide groove 113 and the sliding block 111 to detach it from the mounting frame 10 for cleaning operations.

[0036] Furthermore, the temperature-reducing mechanism 16 includes a ring plate 161, and the ring plate 161 is distributed inside the main body 1. The surfaces of multiple ring plates 161 are provided with annular grooves 162, and one side of multiple ring plates 161 is provided with preset grooves 163. The preset grooves 163 are used for the insertion of irregular sections of the hot water exchange pipe 13. When the flue gas enters the main body 1, in order to avoid the flue gas temperature from losing too quickly, the multiple groups of ring plates 161 distributed in the main body 1 and the annular grooves 162 on their surfaces can effectively slow down the flow rate of the hot gas, thereby ensuring that the area of ​​the hot water exchange pipe 13 between each two ring plates 161 can be evenly heated by the hot gas, thereby improving the heat exchange efficiency.

[0037] The working principle of the technical solution provided by the utility model is as follows:

[0038] The staff connects the smoke inlet pipe 4 to the boiler in advance, and then starts the exhaust pump 8. Under its operation, the hot smoke in the boiler can be guided to the lower connecting frame 3 to be double filtered by the filter frame 5 and the activated carbon filter frame 6, and then input into the main body 1 through the two-section transition pipe 7 to perform heat exchange treatment on the flowing water in the hot water exchange pipe 13. Among them, the filter frame 5 can filter impurities and dust in the smoke, and the activated carbon filter frame 6 can filter odors and corresponding harmful pollutants. When the filter frame 5 has been filtered for a certain period of time or the temperature sensor 17 in the main body 1 shows a temperature difference during heat exchange, the staff can start the motor 922 to rotate the transmission screw 921. At this time, the screw sleeve 923 that acts on the screw will carry the connecting frame 924 and the scraper 925 to cooperate with the guide sleeve 926 and the guide rod 927 to move along the partition of the filter frame 5. The surface is scraped in a fitting manner, so that the impurities can be pushed to the connecting port of the connecting side frame 931. At this time, the electric push rod 935 is started to make the plug 933 in the middle of the slot 932 in the connecting side frame 931 rise, so that the impurities can pass through the guide frame 936 at the end of the connecting side frame 931 and enter the collection box 112 in the mounting frame 10. This cleaning is simple and convenient and will not affect the subsequent waste heat utilization operation. Finally, when the flue gas enters the main body 1, in order to avoid the flue gas temperature losing too quickly, the multiple sets of ring plates 161 distributed in the main body 1 and the annular grooves 162 on the surface thereof can effectively slow down the flow rate of the hot gas, thereby ensuring that the area of ​​the hot water exchange pipe 13 between each two ring plates 161 can be evenly heated by the hot gas, thereby improving the heat exchange efficiency.

[0039] This invention encompasses any alternatives, modifications, equivalents, and solutions that do not depart from the spirit and scope of this invention. To provide a thorough understanding of this invention, specific details are described in detail in the following preferred embodiments of this invention, but those skilled in the art will be able to fully understand this invention without these detailed descriptions. Furthermore, to avoid unnecessary confusion regarding the essence of this invention, well-known methods, processes, procedures, components, and circuits are not described in detail.

[0040] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present invention. These improvements and modifications should also be regarded as within the scope of protection of the present invention.

Claims

1. A boiler flue gas waste heat recovery and utilization device, characterized in that: The smoke filter is installed on the top of the smoke filter, and the smoke filter is installed on the top of the smoke filter, and the smoke filter is installed on the top of the smoke filter, and the smoke filter is installed on the bottom of the smoke filter, and the smoke filter is installed on the top of the smoke filter, and the smoke filter is installed on the bottom of the smoke filter, and the smoke filter is installed on the 2. The boiler flue gas waste heat recovery and utilization device according to claim 1, characterized in that: The cleaning assembly includes a transmission screw, and the transmission screw is installed inside one of the inner mounting frames, one end of the transmission screw is connected to a motor, and a screw sleeve is screwed around one side of the transmission screw, the inner side of the screw sleeve is fixed with a connecting frame, and a scraper is fixed at the bottom end of the connecting frame, the other end of the connecting frame is connected with a guide sleeve, and a guide rod is fixed inside the other inner mounting frame.

3. The boiler flue gas waste heat recovery and utilization device according to claim 2, characterized in that: The guide rod and the guide sleeve are connected in a sliding guide manner.

4. The boiler flue gas waste heat recovery and utilization device according to claim 1, characterized in that: The lifting assembly includes a connecting side frame, and the connecting side frame is fixed to one side of the lower connecting frame. A slot is provided in the middle of the connecting side frame, and a plug-in plate is inserted in the middle of the slot. A side slot is provided above the side of the lower connecting frame, and an electric push rod is installed inside the side slot. The end of the connecting side frame is connected to a guide frame.

5. The boiler flue gas waste heat recovery and utilization device according to claim 4, characterized in that: The extended end of the electric push rod is fixedly connected to the plug plate, and the sizes of the plug plate and the slot are matched.

6. The boiler flue gas waste heat recovery and utilization device according to claim 4, characterized in that: The connecting side frames are distributed in an inclined manner, and the connecting side frames, the guide frames and the mounting frames are connected to each other adjacently.

7. The boiler flue gas waste heat recovery and utilization device according to claim 1, characterized in that: The collecting assembly includes sliding blocks, and the sliding blocks are symmetrically fixed on both sides of the interior of the mounting frame. A collecting box is installed inside the mounting frame, and sliding grooves are opened on both sides of the collecting box. A handle is fixed on the front end of the collecting box.

8. The boiler flue gas waste heat recovery and utilization device according to claim 7, characterized in that: The sliding grooves on both sides of the collecting box and the sliding blocks on both sides of the mounting frame are connected in a sliding guide manner.

9. The boiler flue gas waste heat recovery and utilization device according to claim 1, characterized in that: The temperature-slowing mechanism includes an annular plate, and the annular plates are distributed inside the main body. Surfaces of the plurality of annular plates are provided with annular grooves, and one side of the plurality of annular plates is provided with a preset groove.

10. The boiler flue gas waste heat recovery and utilization device according to claim 9, characterized in that: The preset groove is used for inserting irregular sections of the hot water exchange pipe.

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