Exhaust smoke waste heat recovery device for boiler of thermal power plant

Abstract

The invention relates to the technical field of waste heat recovery, and discloses a thermal power plant boiler smoke exhaust waste heat recovery device which comprises a smoke exhaust frame, fixing sleeves are fixedly connected to the two ends of the smoke exhaust frame correspondingly, a filter screen is fixedly connected to the interior of the fixing sleeve located at the left end, a cleaning mechanism is arranged at the left end of the filter screen, and the cleaning mechanism comprises a protection part. And a knocking piece is arranged in the protection piece. A part of dust impurities in exhausted smoke are blocked by arranging the connecting frame and the deflection plate, so that the number of the dust impurities making contact with the filter screen is reduced, meanwhile, the exhausted smoke can be accelerated to rush to the filter screen by arranging the connecting frame, part of dust adhering to the surface of the filter screen is blown down, and the service life of the filter screen is guaranteed; by making exhausted smoke make contact with the deflection plate and blowing up the deflection plate, exhausted air can be blown out of the through holes in an accelerated mode after passing through the connecting frame, and therefore the blown-out air can effectively impact and remove dust on the surface of the filter screen.

Description

Technical Field

[0001] The invention relates to the technical field of waste heat recovery, and in particular to a waste heat recovery device for flue gas exhaust of a thermal power plant boiler. 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 original meaning of pot refers to a water container heated on fire, and furnace refers to a place where fuel is burned. The boiler consists of two major parts: pot and furnace. The hot water or steam generated in the boiler can directly provide the required thermal energy for industrial production and people's lives, or it can be converted into mechanical energy through a steam power device, or the mechanical energy can be converted into electrical energy through a generator. A boiler that provides hot water is called a hot water boiler, which is mainly used for life and also has a small number of applications in industrial production. A boiler that produces steam is called a steam boiler, often referred to as a boiler, and is mostly used in thermal power plants, ships, locomotives and industrial and mining enterprises.

[0003] When recycling the waste heat of boiler exhaust, the exhaust is usually filtered and then contacted with a water pipe to heat it. The heated water can be recycled and reused. However, after the boiler exhaust is in contact with the filter for a long time, a large amount of dust will adhere to the surface of the filter, which will affect the filtering effect of the filter on the exhaust. Therefore, we proposed a waste heat recovery device for boiler exhaust in thermal power plants. Summary of the invention

[0004] In view of the deficiencies in the prior art, the present invention provides a device for recovering waste heat from flue gas of a thermal power plant boiler to solve the problems raised in the above-mentioned background technology.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a thermal power plant boiler exhaust waste heat recovery device, including a smoke exhaust frame, both ends of the smoke exhaust frame are fixedly connected with fixed sleeves, the fixed sleeve located at the left end is fixedly connected to the inside of a filter net, the left end of the filter net is provided with a cleaning mechanism, the cleaning mechanism includes a protective member, and a knocking member is provided inside the protective member.

[0006] Preferably, the protective member includes a connecting frame, the surface of the connecting frame is fixedly connected to the surface of the filter screen, a slot is formed at the lower end of the connecting frame, eight deflection plates are rotatably connected to the outer surface of the slot via a rotating shaft, and two adjacent deflection plates are connected via a high temperature resistant elastic cloth.

[0007] Preferably, the inner walls of the eight deflection plates are all fixedly connected with elastic members, and the eight elastic members are all fixedly connected to the surface of the connecting frame, and the surface of the connecting frame is provided with through holes.

[0008] Preferably, one end of each of the eight deflection plates away from the connecting frame is arranged to be tilted outward, and the left ends of the eight deflection plates extend out of the connecting frame.

[0009] Preferably, the knocking member includes a connecting belt, which passes through the two deflection plates and is fixedly connected to the inner wall of the fixed sleeve, a fixing frame is fixedly connected to the central axis of the surface of the connecting belt, a pull rope is fixedly connected to the upper end of the inner wall of the fixing frame, a knocking ball is fixedly connected to the bottom of the pull rope, and a connecting plate is fixedly connected to the lower end of the fixing frame.

[0010] Preferably, the knocking ball contacts the surface of the filter screen, the pull rope contacts the surface of the connecting plate, and an opening is provided inside the connecting plate.

[0011] Compared with the prior art, the present invention provides a thermal power plant boiler exhaust waste heat recovery device, which has the following beneficial effects: 1. The present invention blocks part of the dust and impurities in the exhaust smoke by arranging a connecting frame and a deflection plate, thereby reducing the amount of dust and impurities contacting the filter. At the same time, by arranging a connecting frame, the exhaust smoke can be accelerated to rush toward the filter, and part of the dust adhering to the surface of the filter can be blown off, thereby ensuring the service life of the filter.

[0012] 2. The present invention makes the exhaust smoke contact with the deflection plate and blows up the deflection plate, so that the exhaust air can be accelerated to blow out from the through hole after passing through the connecting frame, so that the blown air can effectively impact and remove the dust on the surface of the filter screen.

[0013] 3. The present invention causes the deflection plate to drive the fixing frame to shake through the connecting belt, so that the pull rope can drive the knocking ball to knock the filter, thereby knocking the dust adhered to the surface of the filter to avoid excessive dust adhesion affecting the normal use effect of the filter.

[0014] 4. In the present invention, when the knocking ball is driven by the pull rope to knock, the pull rope can contact the connecting plate, and when the fixing frame shakes, the connecting plate can be driven to make the top of the connecting plate vibrate continuously, so that the pull rope can be continuously knocked, so that the dust removal effect on the filter net is better. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a stereogram of the present invention; Figure 2 It is a structural schematic diagram of the filter screen and the cleaning mechanism of the present invention; Figure 3 A cross-sectional view of the filter screen and the cleaning mechanism of the present invention; Figure 4 It is a schematic diagram of the structure of the protective element of the present invention; Figure 5 For the present invention Figure 4 A cross-sectional view of Figure 6 For the present invention Figure 5 A is an enlarged schematic diagram; Figure 7 It is a schematic structural diagram of the striking member of the present invention.

[0016] In the figure: smoke exhaust frame 1, fixing sleeve 2, filter screen 3, cleaning mechanism 4, protective member 41, connecting frame 411, deflection plate 412, high temperature resistant elastic cloth 413, slot 414, through hole 415, elastic member 416, knocking member 42, connecting belt 421, fixing frame 422, pull rope 423, knocking ball 424, connecting plate 425, opening 426. DETAILED DESCRIPTION

[0017] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0018] Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0019] In the description of the present invention, it is to be understood that the terms “center”, “longitudinal”, “lateral”, “length”, “width”, “thickness”, “up”, “down”, “front”, “back”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inside”, “outside”, “clockwise”, “counterclockwise”, “axial”, “radial”, “circumferential”, etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0020] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0021] See also Figure 1-7The present invention provides a technical solution: a waste heat recovery device for boiler exhaust gas in a thermal power plant, comprising a smoke exhaust frame 1, both ends of the smoke exhaust frame 1 are fixedly connected with fixed sleeves 2, a filter screen 3 is fixedly connected inside the fixed sleeve 2 at the left end, a cleaning mechanism 4 is arranged at the left end of the filter screen 3, the cleaning mechanism 4 comprises a protective member 41, and a knocking member 42 is arranged inside the protective member 41.

[0022] The protective member 41 includes a connecting frame 411, the surface of the connecting frame 411 is fixedly connected to the surface of the filter 3, a slot 414 is provided at the lower end of the connecting frame 411, and the outer surface of the slot 414 is rotatably connected to eight deflection plates 412 through a rotating shaft. The dust impurities in part of the exhaust smoke are blocked by setting the connecting frame 411 and the deflection plates 412, thereby reducing the number of dust impurities contacting the filter 3. At the same time, by setting the connecting frame 411, the exhaust smoke can be accelerated to rush to the filter 3, and part of the dust adhering to the surface of the filter 3 is blown off, thereby ensuring the service life of the filter 3. The two adjacent deflection plates 412 are connected by a high temperature resistant elastic The force cloth 413 is connected, and the inner walls of the eight deflection plates 412 are fixedly connected with elastic members 416, and the eight elastic members 416 are fixedly connected to the surface of the connecting frame 411. The surface of the connecting frame 411 is provided with a through hole 415. The eight deflection plates 412 are respectively arranged with one end away from the connecting frame 411 tilted outward, and the left ends of the eight deflection plates 412 extend out of the connecting frame 411. By making the exhaust smoke contact with the deflection plate 412 and blowing up the deflection plate 412, the exhaust air can be accelerated to be blown out from the through hole 415 after passing through the connecting frame 411, so that the blown wind can effectively impact and remove the dust on the surface of the filter 3.

[0023] The knocking member 42 includes a connecting belt 421, which passes through the two deflection plates 412 and is fixedly connected to the inner wall of the fixed sleeve 2. A fixing frame 422 is fixedly connected to the central axis of the surface of the connecting belt 421, and a pull rope 423 is fixedly connected to the upper end of the inner wall of the fixing frame 422, so that the deflection plate 412 drives the fixing frame 422 to shake through the connecting belt 421, so that the pull rope 423 drives the knocking ball 424 to knock the filter 3, so that the dust adhered to the surface of the filter 3 can be knocked to avoid excessive dust adhesion affecting the normal use effect of the filter 3. A knocking ball 424 is fixedly connected to the bottom of the rope 423, and a connecting plate 425 is fixedly connected to the lower end of the fixed frame 422. The knocking ball 424 contacts the surface of the filter screen 3, and the pull rope 423 contacts the surface of the connecting plate 425. An opening 426 is provided inside the connecting plate 425. When the knocking ball 424 is driven to knock by the pull rope 423, the pull rope 423 can contact the connecting plate 425. When the fixed frame 422 shakes, the connecting plate 425 can be driven to make its top vibrate continuously, so that the pull rope 423 can be continuously knocked, so that the dust removal effect on the filter screen 3 is better.

[0024] When in use, the exhaust smoke of the boiler enters the fixed sleeve 2 and passes through the connection frame 411 and the deflection plate 412 for blocking. Some dust impurities in the exhaust smoke are blocked by the connection frame 411, thereby reducing the amount of dust impurities contacting the filter 3. At the same time, the special setting of the connection frame 411 can make the exhaust smoke pass through the connection frame 411 to accelerate toward the filter 3, and some dust adhering to the surface of the filter 3 can be blown off, thereby ensuring the service life of the filter 3. At the same time, when the exhaust smoke flows along the inside of the fixed sleeve 2, the exhaust smoke can contact the deflection plate 412 and blow up the deflection plate 412, so that the exhaust air can be accelerated to be blown out from the through hole 415 after passing through the connection frame 411, so that the blown wind can effectively impact and remove the dust on the surface of the filter 3, and the deflection plate 412 can be blown off. When deflected by the smoke exhaust, the fixing frame 422 can be driven to shake through the connecting belt 421, so that the fixing frame 422 can drive the knocking ball 424 to knock on the filter 3 through the pull rope 423 when shaking, so that the dust adhered to the surface of the filter 3 can be knocked to avoid excessive dust adhesion affecting the normal use effect of the filter 3. At the same time, when the knocking ball 424 is driven to knock by the pull rope 423, the pull rope 423 can contact the connecting plate 425. When the fixing frame 422 shakes, the connecting plate 425 can be driven to make its top vibrate continuously, so that the pull rope 423 can be continuously knocked, that is, the knocking ball 424 is driven by the pull rope 423 to continuously contact the filter 3, so that the dust removal effect on the filter 3 is better.

[0025] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A waste heat recovery device for flue gas of a thermal power plant boiler, comprising a flue gas frame (1), characterized in that: Both ends of the smoke exhaust rack (1) are fixedly connected to a fixing sleeve (2), a filter screen (3) is fixedly connected inside the fixing sleeve (2) at the left end, a cleaning mechanism (4) is provided at the left end of the filter screen (3), the cleaning mechanism (4) comprises a protective member (41), and a knocking member (42) is provided inside the protective member (41).

2. A thermal power plant boiler exhaust waste heat recovery device according to claim 1, characterized in that: The protective member (41) comprises a connecting frame (411), the surface of the connecting frame (411) being fixedly connected to the surface of the filter screen (3), a slot (414) being provided at the lower end of the connecting frame (411), eight deflection plates (412) being rotatably connected to the outer surface of the slot (414) via a rotating shaft, and two adjacent deflection plates (412) being connected via a high temperature resistant elastic fabric (413).

3. A thermal power plant boiler exhaust waste heat recovery device according to claim 2, characterized in that: The inner walls of the eight deflection plates (412) are all fixedly connected with elastic members (416), and the eight elastic members (416) are all fixedly connected to the surface of the connecting frame (411), and the surface of the connecting frame (411) is provided with a through hole (415).

4. A thermal power plant boiler exhaust waste heat recovery device according to claim 2, characterized in that: One end of each of the eight deflection plates (412) that is away from the connection frame (411) is arranged in an outwardly tilted shape, and the left ends of the eight deflection plates (412) extend out of the connection frame (411).

5. The device for recovering waste heat from flue gas of a thermal power plant boiler according to claim 2, characterized in that: The knocking member (42) comprises a connecting belt (421), wherein the connecting belt (421) passes through two deflection plates (412) therein and is fixedly connected to the inner wall of the fixing sleeve (2), a fixing frame (422) is fixedly connected to the central axis of the surface of the connecting belt (421), a pull rope (423) is fixedly connected to the upper end of the inner wall of the fixing frame (422), a knocking ball (424) is fixedly connected to the bottom of the pull rope (423), and a connecting plate (425) is fixedly connected to the lower end of the fixing frame (422).

6. A thermal power plant boiler exhaust waste heat recovery device according to claim 5, characterized in that: The knocking ball (424) contacts the surface of the filter screen (3), the pull rope (423) contacts the surface of the connecting plate (425), and an opening (426) is provided inside the connecting plate (425).

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