Boiler waste heat recovery device based on ORC technology

Abstract

The utility model relates to the technical field of waste heat recovery, and discloses a boiler waste heat recovery device based on the ORC technology, the boiler waste heat recovery device comprises a smoke exhaust pipe, a vertically-arranged filter pipe is arranged at the middle end of the smoke exhaust pipe, a set of filter holes are formed in the middle end of the inner wall of the filter pipe, and the inner top wall of the filter pipe is rotationally connected with a dust exhaust shaft. According to the boiler waste heat recovery device based on the ORC technology, through the design that a vertical filter pipe and a built-in auger piece are arranged at the middle end of a smoke exhaust pipe, floating objects and particulate matter in tail gas exhausted by a boiler are effectively filtered out, impurities are prevented from covering the surface of a waste heat conversion device, and therefore the service life of the device is prolonged, meanwhile, the heat transfer efficiency is ensured, and the service life of the device is prolonged. The inner wall of the filter pipe can be regularly cleaned through the rotary scraping function of the auger pieces, filter holes are prevented from being blocked, continuous and efficient operation of the filter system is guaranteed, and when the temperature sensor detects that the temperature difference between the two sides of the filter pipe is large, the motor can be automatically started for cleaning.

Description

Technical Field

[0001] This application relates to the field of waste heat recovery technology, specifically a boiler waste heat recovery device based on ORC technology. Background Technology

[0002] In recent years, with economic development, the emergence of boilers has improved people's lives. The exhaust gas discharged after boiler combustion usually has high heat and toxic and harmful particles. However, existing boilers cannot effectively recover and purify the heat energy of boiler exhaust gas, resulting in the waste of boiler exhaust gas heat energy and environmental pollution.

[0003] An existing patent (publication number: CN209295747U) discloses a boiler exhaust gas waste heat power generation device based on ORC technology, belonging to the field of boiler exhaust gas. Its key technical features include a boiler, a waste heat conversion device, an ORC power generation device, a flue gas purification device, and an induced draft fan. The boiler has a closed cone at its top, a first exhaust duct at the top of the closed cone, a waste heat conversion device on the right side of the first exhaust duct, a second exhaust duct on the right side of the waste heat conversion device, a flue gas purification device on the right side of the second exhaust duct, a third exhaust duct on the right side of the flue gas purification device, and an induced draft fan on the right side of the third exhaust duct. A fourth exhaust duct is fixedly connected to the right side of the induced draft fan. Through the cooperation of the waste heat conversion device, the ORC power generation device, the flue gas purification device, and the induced draft fan, the boiler exhaust gas heat recovery and purification are more efficient and energy-saving.

[0004] The top of the closed cone of the above-mentioned device is provided with a first flue gas duct, and a waste heat conversion device is provided on the right side of the first flue gas duct. However, during the combustion process of the boiler, a lot of floating matter and particles are easily generated. The generated impurities are easy to cover the surface of the waste heat conversion device, affecting the service life of the heat exchanger. Secondly, it increases the surface thickness of the heat exchanger, affecting heat transfer and reducing the heat exchange effect. Utility Model Content

[0005] To address the shortcomings of existing technologies, this application provides a boiler waste heat recovery device based on ORC technology, which has advantages such as improving the service life of heat exchangers and solves the problems mentioned in the background technology.

[0006] To achieve the above objectives, this application provides the following technical solution: a boiler waste heat recovery device based on ORC technology, including a flue pipe, a vertically arranged filter pipe at the middle end of the flue pipe, a set of filter holes at the middle end of the inner wall of the filter pipe, a dust removal shaft rotatably connected to the inner top wall of the filter pipe, and an auger plate fixedly connected to the outer surface of the dust removal shaft, the auger plate contacting the inner wall of the filter pipe;

[0007] The bottom end of the filter tube is fixedly connected to a processing box, a collection box is slidably inserted into the right side of the processing box, a connecting pipe is fixedly connected to the top of the left side of the processing box, a dust-suppressing pipe is fixedly connected to the right end of the connecting pipe, and a set of nozzles is fixedly connected to the outer surface of the dust-suppressing pipe.

[0008] The above-mentioned solution, through the design of setting a vertical filter pipe and built-in auger blades in the middle section of the flue gas pipe, effectively filters floating objects and particulate matter in the boiler exhaust gas, preventing impurities from covering the surface of the waste heat conversion device, thereby extending the service life of the equipment, ensuring heat transfer efficiency, and improving heat exchange effect. The rotating scraping function of the auger blades can regularly clean the inner wall of the filter pipe, prevent filter hole blockage, and ensure the continuous and efficient operation of the filtration system. When the temperature sensor detects a large temperature difference on both sides of the filter pipe, it can automatically start the motor for cleaning, realizing intelligent fault warning and handling. Through the setting of the treatment box, collection box, dust settling pipe and nozzle, the effective collection and treatment of filter waste residue is realized, preventing the waste residue from floating under the action of airflow and affecting the waste heat recovery effect. At the same time, the moistened and settled waste residue is easier to collect and treat.

[0009] Furthermore, an induced draft fan is installed inside the right end of the exhaust pipe.

[0010] The above scheme, through the installation of an induced draft fan, can enhance the flow velocity of gas in the flue pipe and improve the boiler waste heat recovery efficiency.

[0011] Furthermore, the inner wall of the exhaust pipe is equipped with anti-corrosion features.

[0012] The above solution can effectively prevent the flue gas emitted from the boiler from corroding the inner wall of the flue pipe and extend the service life of the equipment.

[0013] Furthermore, the outer surface of the exhaust pipe is insulated.

[0014] The above solutions can reduce heat loss during flue gas exhaust and improve waste heat recovery efficiency.

[0015] Furthermore, a motor is fixedly installed at the top of the filter tube, and the output end of the motor is fixedly connected to the dust discharge shaft.

[0016] The above solution, through the motor setting, can drive the dust removal shaft and auger blades to rotate, thereby achieving regular scraping and cleaning of the filter tube and preventing filter pore blockage.

[0017] Furthermore, two temperature sensors are installed on the outer surface of the exhaust pipe, with the two temperature sensors located on both sides of the filter pipe respectively.

[0018] The above scheme and settings enable monitoring of the temperature on both sides of the filter tube. When the temperature difference between the two temperature sensors is large, it indicates that the filter holes are blocked, and the motor needs to be started to drive the auger plate to clean the filter holes.

[0019] Furthermore, a control host is mounted on the front of the processing box.

[0020] The above solution enables remote monitoring and operation of the entire waste heat recovery device via the control host, including starting and stopping equipment such as induced draft fans and motors, as well as monitoring data from sensors such as temperature sensors, to ensure stable operation of the equipment.

[0021] Furthermore, the left end of the connecting pipe is connected to the external pump output end.

[0022] The above scheme allows water to be pumped into the dust collection pipe and then sprayed into the treatment tank through nozzles, thus wetting and settling the waste residue and preventing it from floating up under the influence of airflow, which would affect the waste heat recovery effect.

[0023] Compared with the prior art, the technical solution of this application has the following beneficial effects:

[0024] This boiler waste heat recovery device based on ORC technology effectively filters floating and particulate matter in the boiler exhaust gas by installing a vertical filter tube and built-in auger blades in the middle of the flue gas pipe. This prevents impurities from covering the surface of the waste heat conversion device, thus extending the service life of the equipment and ensuring heat transfer efficiency, thereby improving the heat exchange effect. The rotating scraping function of the auger blades can regularly clean the inner wall of the filter tube, prevent filter hole blockage, and ensure the continuous and efficient operation of the filtration system. When the temperature sensor detects a large temperature difference on both sides of the filter tube, it can automatically start the motor for cleaning, realizing intelligent fault warning and handling. Through the setting of the treatment box, collection box, dust settling pipe and nozzle, the effective collection and treatment of filter waste residue is realized, preventing the waste residue from floating under the action of airflow and affecting the waste heat recovery effect. At the same time, the moistened and settled waste residue is easier to collect and treat. Attached Figure Description

[0025] Figure 1 This is a three-dimensional schematic diagram of the overall structure of this application;

[0026] Figure 2 This is a front view of the overall structure of this application;

[0027] Figure 3 This is a sectional view of the overall structure of this application from the front.

[0028] Figure 4 For this application Figure 3 A three-dimensional image.

[0029] In the picture:

[0030] 1. Exhaust pipe; 2. Filter pipe; 3. Filter holes; 4. Dust discharge shaft; 5. Screw conveyor; 6. Processing box; 7. Collection box; 8. Connecting pipe; 9. Dust settling pipe; 10. Nozzle; 11. Exhaust fan; 12. Motor; 13. Temperature sensor; 14. Control host. Detailed Implementation

[0031] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0032] Please see Figure 1 , Figure 2 and Figure 3 The boiler waste heat recovery device based on ORC technology in this embodiment includes a flue pipe 1. A vertically arranged filter pipe 2 is provided in the middle section of the flue pipe 1. A set of filter holes 3 is provided in the middle of the inner wall of the filter pipe 2. The filter screen can filter floating objects and particulate matter generated by the boiler. A dust removal shaft 4 is rotatably connected to the inner top wall of the filter pipe 2. An auger plate 5 is fixedly connected to the outer surface of the dust removal shaft 4. The auger plate 5 contacts the inner wall of the filter pipe 2. By rotating the auger plate 5, the filter pipe 2 can be scraped, effectively preventing the filter holes 3 from clogging.

[0033] Please see Figure 1 , Figure 2 and Figure 4 An induced draft fan 11 is installed inside the right end of the flue pipe 1. The induced draft fan 11 can enhance the flow speed of the gas in the flue pipe 1 and improve the waste heat recovery efficiency of the boiler. The inner wall of the flue pipe 1 is made of anti-corrosion material, which can effectively prevent the flue gas emitted by the boiler from corroding the inner wall of the flue pipe 1 and extend the service life of the equipment. The outer surface of the flue pipe 1 is insulated, which can reduce heat loss during the flue gas exhaust process and improve the waste heat recovery efficiency.

[0034] Please see Figure 1 , Figure 2 and Figure 4The bottom end of the filter tube 2 is fixedly connected to the processing box 6. The right side of the processing box 6 is slidably connected to the collection box 7. The collection box 7 is used to collect the filtered waste residue. The top of the left side of the processing box 6 is fixedly connected to the connecting pipe 8. The right end of the connecting pipe 8 is fixedly connected to the dust settling pipe 9. The outer surface of the dust settling pipe 9 is fixedly connected to a set of nozzles 10. The dust settling pipe 9 and the nozzles 10 can spray water into the processing box 6, which can mix the waste residue with water and prevent it from floating under the action of airflow. The left end of the connecting pipe 8 is connected to the output end of the external pump body. The pump body can deliver water to the dust settling pipe 9 and then spray it into the processing box 6 through the nozzles 10 to wet and settle the waste residue and prevent it from floating under the action of airflow, which would affect the waste heat recovery effect.

[0035] Please see Figure 1 , Figure 2 and Figure 3 A motor 12 is fixedly installed at the top of the filter tube 2. The output end of the motor 12 is fixedly connected to the dust exhaust shaft 4. The motor 12 drives the dust exhaust shaft 4 and the auger plate 5 to rotate, thereby periodically scraping and cleaning the filter tube 2 and preventing the filter holes 3 from becoming clogged. Two temperature sensors 13 are installed on the outer surface of the exhaust pipe 1. The two temperature sensors 13 are located on both sides of the filter tube 2. With the above settings, the temperature on both sides of the filter tube 2 can be monitored. When the temperature difference between the two temperature sensors 13 is large, it indicates that the filter holes 3 are clogged, and the motor 12 needs to be started to drive the auger plate 5 to clean the filter holes 3. A control host 14 is installed on the front of the treatment box 6. The control host 14 enables remote monitoring and operation of the entire waste heat recovery device, including starting and stopping the induced draft fan 11, motor 12, and other equipment, as well as monitoring the data of the temperature sensors 13 and other sensors to ensure the stable operation of the equipment.

[0036] The boiler waste heat recovery device based on ORC technology in this embodiment effectively filters floating objects and particulate matter in the boiler exhaust gas by setting a vertical filter pipe 2 and an internal auger plate 5 in the middle section of the flue pipe 1. This prevents impurities from covering the surface of the waste heat conversion device, thereby extending the service life of the equipment and ensuring heat transfer efficiency and improving heat exchange effect. The rotating scraping function of the auger plate 5 can periodically clean the inner wall of the filter pipe 2, prevent the filter holes 3 from being blocked, and ensure the continuous and efficient operation of the filtration system. When the temperature sensor 13 detects a large temperature difference between the two sides of the filter pipe 2, it can automatically start the motor 12 for cleaning, realizing intelligent fault warning and handling. Through the setting of the processing box 6, the collection box 7, the dust settling pipe 9, and the nozzle 10, the effective collection and treatment of filter waste residue is realized, preventing the waste residue from floating under the action of airflow and affecting the waste heat recovery effect. At the same time, the wet and settled waste residue is easier to collect and treat.

[0037] The working principle of the above embodiment is as follows: First, the exhaust gas generated by the boiler is discharged through the flue pipe 1. In the middle section of the flue pipe 1, a vertical filter pipe 2 is installed. After the exhaust gas enters the filter pipe 2, it passes through the filter holes 3 in the middle of the inner wall, where floating matter and particulate matter are effectively filtered, ensuring the removal of impurities in the exhaust gas. Next, in order to prevent the filter holes 3 from clogging, a dust removal shaft 4 is rotatably connected to the inner top wall of the filter pipe 2. An auger plate 5 is fixedly connected to the outer surface of the dust removal shaft 4. The auger plate 5 is in close contact with the inner wall of the filter pipe 2. When the motor 12 starts, it drives the dust removal shaft 4 and the auger plate 5 to rotate. The rotating scraping function of the auger plate 5 can periodically clean the inner wall of the filter pipe 2, thereby avoiding the clogging of the filter holes 3. At the bottom end of the filter pipe 2, a treatment box 6 is fixedly connected. The filtered waste falls into the treatment box by gravity. In the treatment box 6, a collection box 7 is slidably inserted into the right side of the treatment box 6 to facilitate the collection and cleaning of waste residue. In order to further improve the treatment effect of waste residue, a connecting pipe 8 is fixedly connected to the top of the left side of the treatment box 6, and a dust settling pipe 9 is fixedly connected to the right end of the connecting pipe 8. A set of nozzles 10 is fixedly connected to the outer surface of the dust settling pipe 9. Water is transported to the dust settling pipe 9 through an external pump and then sprayed into the interior of the treatment box 6 through the nozzles 10. In this way, after the waste residue is mixed with water, it can avoid floating under the action of airflow, ensuring the stability of the waste heat recovery effect. In addition, two temperature sensors 13 are installed on the outer surface of the exhaust pipe 1, located on both sides of the filter pipe 2. When the temperature difference detected by the two temperature sensors 13 is large, it indicates that the filter hole 3 may be blocked. At this time, the motor 12 will be automatically started for cleaning.

[0038] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0039] Although embodiments of this application have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of this application, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A boiler waste heat recovery device based on ORC technology, comprising a flue pipe (1), characterized in that: The exhaust pipe (1) is provided with a vertically arranged filter pipe (2) at the middle end. The filter pipe (2) has a set of filter holes (3) at the middle end of its inner wall. The filter pipe (2) is rotatably connected to the inner top wall of the filter pipe (2). The dust removal shaft (4) is fixedly connected to the outer surface of the dust removal shaft (4). The auger blade (5) is in contact with the inner wall of the filter pipe (2). The bottom end of the filter tube (2) is fixedly connected to the processing box (6), the right side of the processing box (6) is slidably connected to the collection box (7), the top of the left side of the processing box (6) is fixedly connected to the connecting tube (8), the right end of the connecting tube (8) is fixedly connected to the dust settling tube (9), and the outer surface of the dust settling tube (9) is fixedly connected to a set of nozzles (10).

2. The boiler waste heat recovery device based on ORC technology according to claim 1, characterized in that: An induced draft fan (11) is installed inside the right end of the exhaust pipe (1).

3. The boiler waste heat recovery device based on ORC technology according to claim 1, characterized in that: The inner wall of the exhaust pipe (1) is made of corrosion-resistant material.

4. The boiler waste heat recovery device based on ORC technology according to claim 1, characterized in that: The outer surface of the exhaust pipe (1) is insulated.

5. The boiler waste heat recovery device based on ORC technology according to claim 1, characterized in that: A motor (12) is fixedly installed at the top of the filter tube (2), and the output end of the motor (12) is fixedly connected to the dust discharge shaft (4).

6. The boiler waste heat recovery device based on ORC technology according to claim 1, characterized in that: Two temperature sensors (13) are installed on the outer surface of the exhaust pipe (1), and the two temperature sensors (13) are located on both sides of the filter pipe (2).

7. The boiler waste heat recovery device based on ORC technology according to claim 1, characterized in that: The control host (14) is mounted on the front of the processing box (6).

8. The boiler waste heat recovery device based on ORC technology according to claim 1, characterized in that: The left end of the connecting pipe (8) is connected to the pump body output end in the outside.

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