Novel boiler waste heat utilization device

Abstract

The utility model discloses a novel boiler waste heat utilization device, which relates to the technical field of boiler waste heat utilization, and is characterized in that a scraper support slides on the inner wall of a waste heat recoverer in an attached manner along a chute through a lug, and is used for cleaning dust generated on the inner wall due to flue gas when equipment is used for a long time; then the cleaned dust directly falls to the bottom of the interior of the waste heat recoverer, then the dust is pushed by a scraper support to be fed into the formed waste groove, bolts are loosened to be used for centralized treatment of the dust, it can be ensured that the heat exchange surface in the waste heat recoverer is continuously and effectively cleaned, and the waste heat recovery efficiency is improved. Dust accumulated due to long-time use is cleaned, the interior of the waste heat recoverer can be kept clean, and therefore the heat exchange efficiency is improved, boiler waste heat is more fully utilized, the dust treatment process is simplified, dust accumulation in equipment is avoided, dust can be treated in a centralized mode, and cleaning work of operators is facilitated.

Description

Technical Field

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

[0002] Waste heat recovery devices are devices that rationally recover and utilize the heat generated by boiler flue gas. Through heat exchange, they heat room temperature water to produce hot water, hot air, and steam to meet the needs of factory production and daily life. Waste heat recovery units are a common type of waste heat recovery device.

[0003] Reference patent (Publication No.: CN219913124U; Publication Date: 2023-10-27) discloses a boiler waste heat utilization device, including a waste heat recovery unit and an L-shaped frame fixed on the waste heat recovery unit. The L-shaped frame is located on the flue gas inlet side of the waste heat recovery unit, and a cleaning component for cleaning the ash accumulation inside the waste heat recovery unit is provided on the L-shaped frame. This utility model's boiler waste heat utilization device, through the cleaning component, causes the cleaning agent inside the storage tank to be intermittently transported into the waste heat recovery unit through the installation pipe, generating a large amount of chemical fumes. These fumes are distributed onto the inner wall of the waste heat recovery unit, making the ash on the heated surface of the waste heat recovery unit brittle, cracked, easily detached, and burnt out, thus completing the cleaning of the ash accumulation on the inner wall of the waste heat recovery unit. This ensures the cleaning effect while minimizing damage to the inner wall of the waste heat recovery unit, facilitating long-term preheating and utilization of the waste heat recovery unit.

[0004] Based on the aforementioned patent, when the waste heat recovery device is in use, dust in the flue gas can easily enter the interior of the device, causing dust inside the flue gas to accumulate on the inner wall of the waste heat recovery device. Long-term deposits will seriously affect the heat exchange efficiency, resulting in poor waste heat recovery effect. Therefore, this utility model provides a new type of boiler waste heat utilization device. Utility Model Content

[0005] To address the shortcomings of existing technologies, this utility model provides a novel boiler waste heat utilization device. It solves the problem that when the waste heat recovery device is in use, dust in the flue gas can easily enter the interior of the device, causing dust to accumulate on the inner wall of the waste heat recovery device. Long-term accumulation of dust can seriously affect heat exchange efficiency, resulting in poor waste heat recovery. However, cleaning usually requires stopping the machine for manual cleaning, which is not only cumbersome but also affects production continuity and increases maintenance costs.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a novel boiler waste heat utilization device, comprising a waste heat recovery unit, wherein the waste heat recovery unit is equipped with a cleaning mechanism for flue gas collection, the cleaning mechanism comprising:

[0007] The filtration assembly includes a supporting housing fixed inside the waste heat recovery unit. A supporting frame is slidably connected to the inside of the supporting housing in a vertical direction. A filter screen bracket is fixed inside the supporting frame. Engaging components for fixing the supporting frame are provided on both sides of the supporting housing.

[0008] The collection component includes a fixed plate that is fixedly connected to the inner wall of the waste heat recovery unit. The inner wall of the fixed plate is rotatably provided with a reciprocating screw driven by a drive component. The outer wall of the reciprocating screw is threadedly connected with a scraper bracket. The inner bottom surface of the waste heat recovery unit is provided with three sets of waste troughs.

[0009] Preferably, the engaging assembly includes slots formed on both sides of the support frame, support frames are fixedly connected to both sides of the support housing, two sets of springs are fixedly connected to the inner wall of the support frame, and a locking block bracket is fixedly connected to the end of the spring, the locking block bracket being able to engage with the slot.

[0010] Preferably, a pull rod is fixedly connected to the side wall of the block bracket, the outer wall of the pull rod is slidably connected to the support frame, and limit slide rails are fixedly connected to both sides of the inner wall of the support frame, with the two ends of the block bracket being slidably connected inside the limit slide rails.

[0011] Preferably, the drive assembly includes a drive shaft that penetrates the upper interior of the waste heat recovery unit. One end of the drive shaft extending into the waste heat recovery unit is fixedly connected to a drive gear. A U-shaped bracket is fixedly connected to the inner wall of the waste heat recovery unit outside the drive gear. A transmission gear is rotatably connected to the inner wall of the U-shaped bracket. The transmission gear is meshed with the drive gear. One end of the reciprocating screw extends into the interior of the U-shaped bracket and is fixedly connected to the transmission gear. The reciprocating screw is rotatably connected to the U-shaped bracket.

[0012] Preferably, a protrusion is fixedly connected to the upper end of the scraper bracket, and a sliding groove for sliding the protrusion is provided on the inner wall of the waste heat recovery unit. The scraper bracket forms a sliding structure with the protrusion and the sliding groove through a reciprocating screw and the sliding groove.

[0013] Preferably, the waste trough is internally threaded with bolts for waste discharge.

[0014] Beneficial effects

[0015] This utility model provides a novel boiler waste heat utilization device. Compared with the prior art, it has the following advantages:

[0016] Firstly, when the reciprocating screw of this utility model rotates, it drives the scraper bracket to slide along the slide groove on the inner wall of the waste heat recovery unit via the protrusion. This is used to clean the dust generated by flue gas on the inner wall of the equipment during long-term use. The cleaned dust falls directly to the bottom of the waste heat recovery unit and is then pushed into the waste trough by the scraper bracket. Loosening the bolts allows for centralized dust treatment. This ensures that the heat exchange surfaces inside the waste heat recovery unit are continuously and effectively cleaned. Cleaning the dust accumulated over long-term use keeps the inside of the waste heat recovery unit clean, thereby improving heat exchange efficiency, making fuller use of boiler waste heat, simplifying the dust handling process, preventing dust accumulation inside the equipment, and enabling centralized dust treatment, which facilitates the cleaning work of operators.

[0017] Secondly, this invention features a filter support at the air inlet of the waste heat recovery unit. This filter removes particulate matter from the recovered flue gas, preventing impurities from entering the unit and protecting the heat exchange components from wear and blockage, thus extending the equipment's lifespan. The filter support is inserted into the support housing via a support frame. Pulling the lever compresses the locking block support along the limit rail under spring pressure, separating it from the slots on both sides of the support frame. This facilitates disassembly and cleaning of the filter support, making disassembly and installation extremely simple without complex tools or operations. This significantly reduces maintenance difficulty and costs. Regularly cleaning the accumulated dust and impurities on the filter support keeps the flue gas flow unobstructed, ensuring sufficient contact between the flue gas and the heat exchange components, thereby improving the efficiency of waste heat recovery. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0019] Figure 2 This is a schematic diagram of the support frame connection structure of this utility model;

[0020] Figure 3 This is a cross-sectional structural diagram of the waste heat recovery device of this utility model;

[0021] Figure 4 This is a schematic diagram of the waste trough structure of this utility model;

[0022] Figure 5 This is an enlarged structural diagram of point A in this utility model;

[0023] Figure 6 This is an enlarged structural diagram of section B of this utility model.

[0024] In the diagram: 1. Waste heat recovery unit; 2. Support shell; 201. Support frame; 202. Filter screen bracket; 3. Slot; 301. Support frame; 302. Spring; 303. Block bracket; 304. Limiting slide rail; 305. Pull rod; 4. Fixing plate; 401. Reciprocating screw; 402. Slide groove; 403. Protrusion; 404. Scraper bracket; 5. Drive shaft; 501. Drive gear; 502. U-shaped bracket; 503. Transmission gear; 6. Waste trough; 601. Bolt. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0026] Please see Figures 1-6 This utility model provides a technical solution: a novel boiler waste heat utilization device, including a waste heat recovery unit 1, which is equipped with a cleaning mechanism for flue gas collection. The cleaning mechanism includes:

[0027] The filter assembly includes a support housing 2 fixed to the waste heat recovery unit 1. The support housing 2 is located at the air inlet end of the waste heat recovery unit 1. The support housing 2 is hollow inside and communicates with the inside of the waste heat recovery unit 1 on both the left and right sides. A support frame 201 is slidably connected to the inside of the support housing 2 in the vertical direction. The support frame 201 can extend from the top of the support housing 2. A filter support 202 is fixed inside the support frame 201. The two sides of the support housing 2 are provided with locking components for fixing the support frame 201. When the support frame 201 is inside the support housing 2 and does not extend from the top of the support housing 2, the locking components fix the support frame 201 to the support housing 2 and seal the top opening of the support housing 2.

[0028] The collection component includes a fixing plate 4 fixedly connected to the inner wall of the waste heat recovery unit 1. In this embodiment, there are two fixing plates 4, which are located at both ends of the waste heat recovery unit 1 along its length. On the side of the two fixing plates 4 that are close to each other, there are reciprocating screws 401 driven by the driving component. The outer wall of the reciprocating screws 401 is threadedly connected to a scraper bracket 404. The scraper bracket 404 is annular, and its diameter is slightly smaller than the inner diameter of the waste heat recovery unit 1. Three sets of arc-shaped waste troughs 6 are opened on the inner bottom surface of the waste heat recovery unit 1.

[0029] In a preferred embodiment, the engaging assembly includes slots 3 formed at the top of the side walls of the support frame 201. Support frames 301 are fixedly connected to the top left and right sides of the support housing 2. Each support frame 301 includes a base plate and side plates. The base plate is perpendicularly connected to the side walls of the support housing 2. The side plates are perpendicular to the base plate and positioned perpendicular to the top surface of the support housing 2. Two sets of springs 302 are fixedly connected to the inner walls of the side plates of the support frame 301. A locking block bracket 303 is fixedly connected to the end of each spring 302. The locking block bracket 303 has an approximately T-shaped structure, including mutually perpendicular horizontal sections and... The vertical and horizontal parts are fixedly connected to the spring 302. The vertical part of the locking block bracket 303 is used to engage with the locking slot 3. A pull rod 305 is fixedly connected to the middle of the horizontal side wall of the locking block bracket 303. The extension direction of the pull rod 305 is consistent with the extension direction of the spring 302. The outer wall of the pull rod 305 is slidably connected to the side plate of the support frame 301 along the length of the pull rod 305. The pull rod 305 passes through the side plate of the support frame 301 and forms a pulling part on the outside of the support frame 301. Limiting slide rails 304 are fixedly connected to both sides of the inner wall of the bottom plate of the support frame 301. The two ends of the horizontal part of 303 are located inside the limiting slide rail 304 and are slidably connected to the limiting slide rail 304. The filter support 202 fixed inside the support frame 201 is set corresponding to the air inlet of the waste heat recovery unit 1. It is used to filter particulate matter in the recovered flue gas, prevent impurities from entering the waste heat recovery unit 1, thereby protecting the heat exchange components from wear and blockage and extending the service life of the equipment. Then, the filter support 202 is inserted into the support housing 2 through the support frame 201. The pull part of the pull rod 305 is pulled to lock the filter support 202. The block bracket 303 moves along the limiting slide rail 304, and the spring 302 is compressed, causing the block bracket 303 to separate from the slots 3 on both sides of the support frame 201. This facilitates the disassembly and cleaning of the filter screen bracket 202, making the disassembly and installation of the filter screen bracket 202 very simple, without the need for complicated tools or operations, greatly reducing the difficulty and cost of maintenance. Regularly cleaning the dust and impurities on the filter screen bracket 202 can keep the flue gas flow channel unobstructed, ensure sufficient contact between the flue gas and the heat exchange components, and thus improve the efficiency of waste heat recovery.

[0030] In a preferred embodiment, the drive assembly for driving the reciprocating screw 401 includes a drive shaft 5 that penetrates the upper interior of the waste heat recovery unit 1. One end of the drive shaft 5 extending into the waste heat recovery unit 1 is fixedly connected to a drive gear 501. A U-shaped bracket 502 is fixedly connected to the inner wall of the waste heat recovery unit 1 outside the drive gear 501. A transmission gear 503 is rotatably connected to the inner wall of the U-shaped bracket 502. The transmission gear 503 meshes with the drive gear 501. One end of the reciprocating screw 401 away from the fixed plate 4 extends into the interior of the U-shaped bracket 502 and is fixedly connected to the transmission gear 503. The reciprocating screw 401 is rotatably connected to the U-shaped bracket 502. The drive shaft 5 is driven by a motor located outside the waste heat recovery unit 1, which drives the drive gear 501 to rotate. Then, the reciprocating screw 401 rotates on the U-shaped bracket 502 under the meshing transmission gear 503 and the drive gear 501, thus realizing the rotation of the reciprocating screw 401.

[0031] In a preferred embodiment, a protrusion 403 is fixedly connected to the upper end of the scraper bracket 404. A groove 402 for sliding the protrusion 403 is provided on the inner wall of the waste heat recovery unit 1. The length direction of the groove 402 is parallel to the length direction of the waste heat recovery unit 1. The scraper bracket 404 forms a sliding structure with the groove 402 via a reciprocating screw 401 and the protrusion 403. A bolt 601 is threaded into the waste trough 6 for waste discharge. When the reciprocating screw 401 rotates, it drives the scraper bracket 404 to slide along the groove 402 on the inner wall of the waste heat recovery unit 1 via the protrusion 403. This facilitates the sliding of the inner wall of the equipment during prolonged use. The dust generated by the flue gas is cleaned, and the cleaned dust falls directly to the bottom of the waste heat recovery unit 1. Then, it is pushed into the waste trough 6 by the scraper bracket 404. The bolts 601 are loosened for centralized dust treatment, which ensures that the heat exchange surface inside the waste heat recovery unit 1 is continuously and effectively cleaned. Cleaning the dust accumulated due to long-term use can keep the inside of the waste heat recovery unit 1 clean, thereby improving the heat exchange efficiency, making fuller use of boiler waste heat, simplifying the dust handling process, avoiding the accumulation of dust inside the equipment, and enabling centralized dust treatment, which facilitates the cleaning work of operators.

[0032] Furthermore, any content not described in detail in this specification is existing technology known to those skilled in the art.

[0033] During operation, a filter support 202 is installed at the air inlet of the waste heat recovery unit 1 to filter particulate matter in the recovered flue gas, preventing impurities from entering the interior of the waste heat recovery unit 1, thereby protecting the heat exchange components from wear and blockage and extending the service life of the equipment. The filter support 202 is then inserted into the interior of the support housing 2 through the support frame 201. By pulling the pull rod 305, the locking block support 303 is compressed along the limit slide rail 304 under the action of the spring 302, causing the locking block support 303 to separate from the locking grooves 3 on both sides of the support frame 201, thus facilitating the disassembly and cleaning of the filter support 202. This makes the disassembly and installation of the filter support 202 very simple, requiring no complicated tools or operations, greatly reducing the difficulty and cost of maintenance. Regularly cleaning the dust and impurities on the filter support 202 can keep the flue gas flow unobstructed.

[0034] The drive shaft 5 is driven by a motor, which drives the drive gear 501 to rotate. The reciprocating screw 401 rotates on the U-shaped bracket 502 through the meshing of the transmission gear 503 and the drive gear 501. This rotation of the reciprocating screw 401 drives the scraper bracket 404 to slide along the slide groove 402 via the protrusion 403 on the inner wall of the waste heat recovery unit 1. This is used to clean the dust generated by flue gas on the inner wall of the equipment during long-term use. The cleaned dust falls directly to the bottom of the waste heat recovery unit 1 and is then pushed into the waste trough 6 by the scraper bracket 404. Loosening the bolt 601 allows for centralized dust treatment, ensuring that the heat exchange surface inside the waste heat recovery unit 1 is continuously and effectively cleaned. Cleaning the dust accumulated during long-term use keeps the inside of the waste heat recovery unit 1 clean, thereby improving heat exchange efficiency.

[0035] 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 process, method, article, or apparatus.

[0036] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A novel boiler waste heat utilization device, comprising a waste heat recovery unit (1), characterized in that: The waste heat recovery unit (1) is equipped with a cleaning mechanism for flue gas collection, the cleaning mechanism including: The filter assembly includes a support housing (2) fixed to the waste heat recovery unit (1), a support frame (201) slidably connected to the interior of the support housing (2) in the vertical direction, a filter screen bracket (202) fixed inside the support frame (201), and engaging components for fixing the support frame (201) on both sides of the support housing (2). The collection component includes a fixed plate (4) fixedly connected to the inner wall of the waste heat recovery unit (1). The inner wall of the fixed plate (4) is rotatably provided with a reciprocating screw (401) driven by a drive component. The outer wall of the reciprocating screw (401) is threadedly connected with a scraper bracket (404). The bottom surface of the waste heat recovery unit (1) is provided with three sets of waste troughs (6).

2. The novel boiler waste heat utilization device according to claim 1, characterized in that: The engaging assembly includes slots (3) on both sides of the support frame (201), a support frame (301) is fixedly connected to both sides of the support shell (2), two sets of springs (302) are fixedly connected to the inner wall of the support frame (301), and a locking block bracket (303) is fixedly connected to the end of the spring (302). The locking block bracket (303) can engage with the slots (3).

3. The novel boiler waste heat utilization device according to claim 2, characterized in that: The side wall of the block bracket (303) is fixedly connected to a pull rod (305). The outer wall of the pull rod (305) is slidably connected to the support frame (301). The inner walls of the support frame (301) are fixedly connected to two limit rails (304). The two ends of the block bracket (303) are slidably connected inside the limit rails (304).

4. The novel boiler waste heat utilization device according to claim 1, characterized in that: The drive assembly includes a drive shaft (5) that is connected through the upper interior of the waste heat recovery unit (1). One end of the drive shaft (5) extending into the interior of the waste heat recovery unit (1) is fixedly connected to a drive gear (501). A U-shaped bracket (502) is fixedly connected to the inner wall of the waste heat recovery unit (1) outside the drive gear (501). A transmission gear (503) is rotatably connected to the inner wall of the U-shaped bracket (502). The transmission gear (503) is meshed with the drive gear (501). One end of the reciprocating screw (401) extends into the interior of the U-shaped bracket (502) and is fixedly connected to the transmission gear (503). The reciprocating screw (401) is rotatably connected to the U-shaped bracket (502).

5. A novel boiler waste heat utilization device according to claim 1, characterized in that: The upper end of the scraper bracket (404) is fixedly connected to a protrusion (403), and the inner wall of the waste heat recovery unit (1) is provided with a sliding groove (402) for sliding of the protrusion (403). The scraper bracket (404) forms a sliding structure with the sliding groove (402) through the reciprocating screw (401), the protrusion (403) and the sliding groove (402).

6. The novel boiler waste heat utilization device according to claim 1, characterized in that: The waste trough (6) is internally threaded with bolts (601).

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