Boiler waste heat recovery device for thermal power plant

Abstract

The utility model relates to the technical field of boiler waste heat recovery, and discloses a boiler waste heat recovery device for a thermal power plant, which comprises a recovery box, the middle position of the top of the recovery box is connected with a water inlet pipe, and the upper parts of the front and rear sides of the recovery box are provided with motors through foot stools; the S-shaped smoke pipes are inserted in the middle, the left side and the right side of the interior of the recycling box, an L-shaped plate is inserted in the position, located between the S-shaped smoke pipes, of the interior of the recycling box, and a rotor of the motor is coaxially connected with a cam; the steel wire scrubbing brushes are arranged on the left side and the right side of the L-shaped plate. According to the boiler waste heat recovery device for the thermal power plant, a motor drives a cam to rotate, so that an L-shaped plate and a steel wire scrubbing brush can be pushed to do up-and-down reciprocating motion, and when an S-shaped smoke pipe heats a water body, the steel wire scrubbing brush conducts up-and-down reciprocating scraping motion on the surface of the water body; the phenomenon of scaling on the surface of the S-shaped smoke pipe during recovery heating is avoided, the smoothness of the heat exchange surface is kept, and the heat resistance is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to a boiler waste heat recovery technical field, concretely is a boiler waste heat recovery device for thermal power plant. BACKGROUND

[0002] The boiler waste heat recovery device is a key equipment for improving thermal efficiency and reducing energy consumption in thermal power plants. Its main function is to recover the waste heat generated during the operation of the boiler, which is usually discharged in the form of flue gas and contains a large amount of heat energy that has not been fully utilized. Through the waste heat recovery device, this part of heat energy can be converted into usable heat energy for heating feedwater, generating steam or other industrial purposes, thereby significantly improving the energy utilization efficiency and economy of the entire power generation system.

[0003] The common waste heat recovery device includes a heating tank, a smoke pipe and a water injection and drainage mechanism. When in use, water is injected into the heating tank through the water injection and drainage mechanism, and the flue gas inside the boiler is introduced into the inside of the smoke pipe. Since the smoke pipe is installed inside the heating tank, the temperature of the outer wall of the smoke pipe increases when the high-temperature flue gas flows through it, thereby contacting the water to heat it, achieving the purpose of recovering the waste heat of the boiler flue gas.

[0004] However, this method has the problem that the water body is in a static state when being heated, not only reducing the contact area between the water body and the smoke pipe, but also causing scaling on the surface of the smoke pipe after long-term heating, increasing the thermal resistance of the smoke pipe and preventing heat from being transferred to the water more quickly, affecting the quality of boiler waste heat recovery and failing to meet the working requirements of boiler waste heat recovery. Therefore, a boiler waste heat recovery device for thermal power plants is proposed. UTILITY MODEL CONTENTS

[0005] (I) Technical problem solved

[0006] In view of the deficiencies of the prior art, the utility model provides a boiler waste heat recovery device for thermal power plants to solve the technical problem that the water body is in a static state when being heated, not only reducing the contact area between the water body and the smoke pipe, but also causing scaling on the surface of the smoke pipe after long-term heating.

[0007] (II) Technical scheme

[0008] To achieve the above-mentioned purpose, the utility model provides the following technical scheme: a boiler waste heat recovery device for thermal power plants, comprising:

[0009] A recovery tank is connected with a water inlet pipe at the top middle position, a drainage pipe is installed at the left lower part of the recovery tank, and an electric motor is installed on the upper part of the front and rear sides of the recovery tank through a foot support;

[0010] S-shaped flue pipe is arranged in the middle position and left and right sides of the inside of the recycling box, L-shaped plate is arranged in the position between the S-shaped flue pipes, and the rotor of the motor is coaxially connected with a cam.

[0011] Steel wire plate brush is arranged on the left and right sides of the L-shaped plate, and the outside of the S-shaped flue pipe is sleeved with a fin.

[0012] Preferably, the top left and right sides of the L-shaped plate are arranged with assembly rods, the bottom ends of the assembly rods are connected with the corresponding positions of the top of the recycling box, the outside lower sides of the assembly rods are sleeved with springs, and the up and down vibration of the L-shaped plate is facilitated.

[0013] Preferably, the upper and lower ends of the spring are connected with the bottom of the L-shaped plate and the corresponding position of the top of the recycling box respectively, and the top ends of the assembly rods are coaxially installed with limit discs, so that the L-shaped plate is prevented from being separated from the outside of the assembly rod.

[0014] Preferably, the bottom of the recycling box is installed with a base, the inner cavity top middle position of the base is connected with a mounting box, the left sides of the inside of the base and the mounting box are arranged with rotating shafts, and rotation is facilitated.

[0015] Preferably, the left end of the rotating shaft is coaxially installed with a hand wheel, the inside of the base is arranged with a bottom plate, the bottom corners of the bottom plate are installed with universal wheels, and the right end of the rotating shaft is coaxially installed with a driving bevel gear.

[0016] Preferably, the inside lower part of the mounting box is installed with a driven bevel gear through a bearing, the driven bevel gear is engaged with the driving bevel gear, the bottom of the driven bevel gear is coaxially connected with a screw rod, the lower part of the screw rod is engaged with the inside of the bottom plate, the rotation of the driving bevel gear can be driven by rotating the rotating shaft, the rotation of the screw rod can be driven by the driven bevel gear, the bottom plate and the universal wheels can move up and down, the universal wheels can be exposed when the recycling box needs to be moved, and the waste heat recovery device can be moved, so that the device can be positioned in different working areas or maintenance positions, and the adaptability and multifunctionality of the device are improved.

[0017] (Three) beneficial effects

[0018] Compared with the prior art, the waste heat recovery device for a boiler of a thermal power plant has the following beneficial effects:

[0019] The boiler waste heat recovery device for the thermal power plant drives rotation of the cam through the motor, thereby pushing the L-shaped plate and the steel wire plate brush to move up and down reciprocally, so that the surface of the S-shaped smoke pipe can be scraped up and down reciprocally by the steel wire plate brush when the S-shaped smoke pipe heats the water body, the phenomenon of scale formation on the surface of the S-shaped smoke pipe is avoided when the waste heat is recovered, and the water body can be shaken to repeatedly impact the surface of the S-shaped smoke pipe in the process of up and down movement, not only the heat exchange efficiency can be effectively improved, but also the scale on the surface of the S-shaped smoke pipe and the fin can be removed, the smoothness of the heat exchange surface is maintained, the thermal resistance is reduced, the heat transfer is more rapid and efficient, in addition, the scale is reduced, the additional heat loss caused by the scale is reduced, and therefore the energy efficiency of the entire waste heat recovery system is improved. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 It is a structural schematic view of the utility model;

[0021] Figure 2 It is a sectional structural schematic view of the recycling box of the utility model;

[0022] Figure 3 It is a structural schematic view of the steel wire plate brush of the utility model;

[0023] Figure 4 It is a structural schematic view of the base of the utility model;

[0024] Figure 5 It is a sectional structural schematic view of the bottom plate and the mounting box of the utility model.

[0025] In the drawing: 1, recycling box; 2, water inlet pipe; 3, drain pipe; 4, motor; 5, L-shaped plate; 6, S-shaped smoke pipe; 7, fin; 8, assembly rod; 9, cam; 10, spring; 11, limit disc; 12, steel wire plate brush; 13, base; 14, mounting box; 15, bottom plate; 16, universal wheel; 17, rotating shaft; 18, hand wheel; 19, driving bevel gear; 20, driven bevel gear; 21, screw rod. DETAILED DESCRIPTION

[0026] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the utility model.

[0027] The utility model provides a technical scheme, a boiler waste heat recovery device for thermal power plant, including recovery box 1, inlet pipe 2, drain pipe 3, motor 4, L shaped board 5, S shaped flue 6, fin 7, assembly rod 8, cam 9, spring 10, limit disc 11, steel wire plate brush 12, base 13, installation box 14, bottom plate 15, universal wheel 16, rotating shaft 17, hand wheel 18, driving bevel gear 19, driven bevel gear 20 and screw rod 21:

[0028] Please refer to Figure 1 Recovery box 1 is connected with inlet pipe 2 at the top middle position, and drain pipe 3 is installed at the left lower part of recovery box 1, and motor 4 is installed on the upper part of the front and rear sides of recovery box 1 through the support frame;

[0029] S shaped flue 6 is inserted in the inside middle position and left and right sides of recovery box 1, please refer to Figure 2 L shaped board 5 is inserted in the inside position between S shaped flue 6 of recovery box 1, please refer to Figure 1 The rotor of motor 4 is coaxially connected with cam 9;

[0030] Please refer to Figure 3 Steel wire plate brush 12 is installed on the left and right sides of L shaped board 5, please refer to Figure 2 The outside of S shaped flue 6 is all sleeved with fin 7, please refer to Figure 1 The top left and right sides of L shaped board 5 are all inserted with assembly rod 8, and the bottom end of assembly rod 8 is all connected with the top corresponding position of recovery box 1, the outside lower side of assembly rod 8 is all sleeved with spring 10, and the upper and lower ends of spring 10 are respectively connected with the bottom of L shaped board 5 and the top corresponding position of recovery box 1, and the top end of assembly rod 8 is all coaxially installed with limit disc 11, the rotation of cam 9 is driven through motor 4, so as to push the up-down reciprocating motion of L shaped board 5 and steel wire plate brush 12, the up-down reciprocating scraping motion of the surface of S shaped flue 6 is carried out through steel wire plate brush 12 when S shaped flue 6 heats water, the phenomenon that S shaped flue 6 surface is scaled is avoided, and the water body can be oscillated in the process of up-down motion and repeatedly impacts the surface of S shaped flue 6, not only can effectively improve the heat exchange efficiency, but also can remove the scale on the surface of S shaped flue 6 and fin 7, keep the smoothness of heat exchange surface, reduce the thermal resistance, make the heat transfer more rapid and efficient, in addition, reduce the scale, also reduce the additional heat loss caused by scale, so as to improve the energy efficiency of the whole waste heat recovery system;

[0031] The bottom of recovery box 1 is all installed with base 13, please refer to Figure 4The inner cavity of the base 13 is connected with the mounting box 14 at the middle position of the top, the left side of the inner cavity of the base 13 and the mounting box 14 is inserted with the rotating shaft 17, the left end of the rotating shaft 17 is coaxially installed with the hand wheel 18, the inner cavity of the base 13 is inserted with the bottom plate 15, and the bottom of the four corners of the bottom plate 15 is installed with the universal wheel 16, please refer to Figure 5 The right end of the rotating shaft 17 is coaxially installed with the driving bevel gear 19, the inner cavity of the mounting box 14 is installed with the driven bevel gear 20 at the lower part through the bearing, and the driven bevel gear 20 is engaged with the driving bevel gear 19, the bottom of the driven bevel gear 20 is coaxially connected with the screw rod 21, and the lower part of the screw rod 21 is engaged with the inner cavity of the bottom plate 15, the rotating shaft 17 can drive the driving bevel gear 19 to rotate, the driven bevel gear 20 can drive the screw rod 21 to rotate, the bottom plate 15 and the universal wheel 16 can move up and down, when the recovery box 1 needs to be moved, the universal wheel 16 can be leaked, and the waste heat recovery device can be moved to be positioned at different working areas or maintenance positions, the adaptability and multifunctionality of the equipment are improved.

[0032] The rotating shaft 17 can drive the driving bevel gear 19 to rotate, the driven bevel gear 20 can drive the screw rod 21 to rotate, the bottom plate 15 and the universal wheel 16 can move up and down, when the recovery box 1 needs to be moved, the universal wheel 16 can be leaked, and the waste heat recovery device can be moved to be positioned at different working areas or maintenance positions, the adaptability and multifunctionality of the equipment are improved.

[0033] It should be noted that, in this text, the relationship terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between the entities or operations. Moreover, the term "includes", "contains" or any other variant thereof is intended to cover non-exclusive inclusion, so that the process, method, article or equipment including a series of elements not only includes those elements, but also includes other elements not explicitly listed or inherent to such process, method, article or equipment.

[0034] While the embodiments of the present application have been illustrated and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the spirit and scope of the application, which is defined by the appended claims and their equivalents.

Claims

1. A boiler waste heat recovery device for thermal power plants, characterized by, Include: The recycling box (1), the top middle position of the recycling box (1) is connected with the water inlet pipe (2), the left lower part of the recycling box (1) is installed with the drain pipe (3), the front and rear sides of the recycling box (1) are installed with the motor (4) through the foot stand on the upper part; S-shaped flue (6), inserted in the middle position and left and right sides of the recycling box (1), the inside of the recycling box (1) is inserted with L-shaped plate (5) between S-shaped flue (6), the rotor of the motor (4) is coaxially connected with the cam (9); Steel wire plate brush (12), installed on the left and right sides of the L-shaped plate (5), the outside of the S-shaped flue (6) is sleeved with the fin (7).

2. A boiler waste heat recovery device for a thermal power plant according to claim 1, characterized in that: The top left and right sides of the L-shaped plate (5) are inserted with the assembling rod (8), and the bottom end of the assembling rod (8) is connected with the corresponding position of the top of the recycling box (1), the outside of the assembling rod (8) is sleeved with the spring (10).

3. A boiler heat recovery device for thermal power plants according to claim 2, characterized in that: The upper and lower ends of the spring (10) are connected with the bottom of the L-shaped plate (5) and the corresponding position of the top of the recycling box (1) respectively, the top end of the assembling rod (8) is coaxially installed with the limiting disc (11).

4. A boiler waste heat recovery device for thermal power plants according to claim 1, characterized in that: The bottom of the recycling box (1) is installed with the base (13), the inner cavity of the base (13) is connected with the mounting box (14) in the middle position of the top, the left side of the inside of the base (13) and the mounting box (14) is inserted with the rotating shaft (17).

5. A boiler heat recovery device for thermal power plants according to claim 4, characterized in that: The left end of the rotating shaft (17) is coaxially installed with the hand wheel (18), the inside of the base (13) is inserted with the bottom plate (15), and the bottom plate (15) is installed with the universal wheel (16) on the bottom of the four corners, the right end of the rotating shaft (17) is coaxially installed with the driving bevel gear (19).

6. A boiler heat recovery device for thermal power plants according to claim 5, characterized in that: The inside of the mounting box (14) is installed with the driven bevel gear (20) through the bearing on the lower part, and the driven bevel gear (20) is engaged with the driving bevel gear (19), the bottom of the driven bevel gear (20) is coaxially connected with the screw rod (21), the lower part of the screw rod (21) is engaged with the inside of the bottom plate (15).

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