Flue gas waste heat recycling structure of thermal power plant

Abstract

The utility model relates to the technical field of waste heat recovery, and discloses a heat-engine plant flue gas waste heat recycling structure which comprises a box body, a heat exchange tube is fixedly connected to one side in the box body, a plurality of fins are fixedly connected to the surface of the heat exchange tube, a filter screen is clamped to the other side in the box body, and the heat exchange tube is fixedly connected to the surface of the filter screen. A knocking assembly is installed in the middle of the interior of the box body, a spraying assembly is installed at one end of the interior of the box body, the spraying assembly comprises a liquid distribution pipe, a plurality of nozzles, two guide assemblies and an electric push rod, and the two guide assemblies are connected to the tops of one ends of the two sides of the inner wall of the box body respectively. According to the heat exchanger, the filter screen is arranged at the front end of the heat exchange structure, particulate matter in smoke can be blocked, the situation that the particulate matter adheres to the heat exchange pipes and the fins to reduce the heat exchange performance is avoided, incrustation scale generated on the heat exchange pipes and the fins can be effectively removed by spraying the acetic acid solution, and the situation that normal heat exchange work is affected is avoided.

Description

TECHNICAL FIELD

[0001] The utility model relates to a waste heat recovery technical field especially relates to a thermal power plant flue gas waste heat recovery and utilization structure. BACKGROUND

[0002] The flue gas of the thermal power plant comes from the waste gas produced when burning coal, natural gas or other fuels, and the heat energy in the boiler flue gas is collected and converted into usable energy to improve energy utilization efficiency and reduce environmental pollution, so as to realize the recovery and utilization of the flue gas waste heat of the thermal power plant.

[0003] The finned heat exchanger can recover the heat energy in the flue gas, but the existing flue gas waste heat recovery and utilization structure has defects. First, the existing waste heat recovery and utilization structure lacks a filtering structure for particulate matter in the flue gas, which will adhere to the pipes and fins of the heat exchanger, reducing the heat exchange performance. Second, the calcium and magnesium components in the flue gas can cause scale to form on the surface of the heat exchanger, lacking an effective removal structure, affecting the normal operation of the heat exchange work. Therefore, a thermal power plant flue gas waste heat recovery and utilization structure is proposed to solve the above problems. SUMMARY

[0004] To make up for the above shortcomings, the utility model provides a thermal power plant flue gas waste heat recovery and utilization structure, aiming at improving the existing waste heat recovery and utilization structure lacking a filtering structure for particulate matter in the flue gas, which will adhere to the pipes and fins of the heat exchanger, reducing the heat exchange performance, and the calcium and magnesium components in the flue gas can cause scale to form on the surface of the heat exchanger, lacking an effective removal structure, affecting the normal operation of the heat exchange work.

[0005] To achieve the above purpose, the utility model adopts the following technical scheme: a thermal power plant flue gas waste heat recovery and utilization structure, comprising a box body, a heat exchange pipe is fixedly connected to one side inside the box body, a plurality of fins are fixedly connected to the surface of the heat exchange pipe, a filter screen is clamped on the other side inside the box body, a knocking assembly is installed in the middle of the box body, a spraying assembly is installed at one end of the box body, and a box cover is fixedly installed at the top end of the box body through bolts;

[0006] The spraying assembly comprises a liquid distribution pipe, a plurality of nozzles, two guide assemblies and an electric push rod, the two guide assemblies are respectively connected to the top of one end of the inner wall of the box body on both sides, a liquid distribution pipe is connected between the two guide assemblies, a plurality of nozzles are uniformly fixed and communicated on the surface of the liquid distribution pipe, an electric push rod is fixedly installed at one end of the top end of the box cover, and the output end of the electric push rod is fixedly connected with the liquid distribution pipe.

[0007] Further description of the above technical scheme:

[0008] The knocking assembly comprises a servo motor, an eccentric wheel, a connecting rod, a crankshaft and a plurality of knocking rods, the crankshaft is rotationally connected to the top of the middle part of the inner wall of the box through a bearing, the bottom of the crankshaft is uniformly fixedly connected with the plurality of knocking rods, the top of the middle part of the rear side of the box is fixedly installed with the servo motor, the output end of the servo motor is fixedly connected with the eccentric wheel through the inner wall of the box, the surface of the eccentric wheel is rotationally connected with the connecting rod, and one end of the connecting rod is rotationally connected with the bottom of the crankshaft.

[0009] As a further description of the above technical solution:

[0010] The guiding assembly comprises a sliding rail and a sliding block, the sliding rail is fixedly connected to the inner wall of the box, the surface of the sliding rail is slidably connected with the sliding block, and the sliding block is fixedly connected to one end of the liquid distribution pipe.

[0011] As a further description of the above technical solution:

[0012] One end of the box is fixedly connected with an air inlet pipe.

[0013] As a further description of the above technical solution:

[0014] The end of the box away from the air inlet pipe is fixedly connected with an air outlet pipe.

[0015] As a further description of the above technical solution:

[0016] The top end of the liquid distribution pipe is fixedly connected with a liquid supply hose, and the surface of the box cover is provided with a hole corresponding to the liquid supply hose.

[0017] As a further description of the above technical solution:

[0018] The bottom of the box near the liquid distribution pipe is fixedly connected with a liquid discharge valve.

[0019] As a further description of the above technical solution:

[0020] Both ends of the heat exchange pipe are fixedly connected with connectors penetrating through the outer wall of the box.

[0021] The utility model has the advantages of the following beneficial effects:

[0022] 1、 in the utility model, the filter screen is arranged at the front end of the heat exchange structure, the particulate matters in the flue gas are blocked, the particulate matters are prevented from adhering to the heat exchange pipe and the fin and reducing the heat exchange performance, the servo motor is started periodically, under the cooperation of the eccentric wheel, the connecting rod and the crankshaft, the plurality of knocking rods are driven to reciprocatingly knock the filter screen, the particulate matters adhered to the surface of the filter screen are shaken off, the function of dredging is achieved, and the cleaning and maintenance frequency of the filter screen is reduced.

[0023] 2. The utility model discloses, with the liquid supply hose to the cloth liquid pipe import acetic acid solution to the nozzle even to the heat exchange structure surface, and simultaneously start electric push rod, under the cooperation of slider and slide rail drive nozzle up and down movement, to increase the spray area, can effectively remove the scale that generates on the heat exchange tube and fin, avoid the normal operation of heat exchange work. BRIEF DESCRIPTION OF DRAWINGS

[0024] Figure 1 A three-dimensional schematic view of a thermal power plant flue gas waste heat recycling structure is provided for the utility model;

[0025] Figure 2 A structure schematic view of the box body inside of a thermal power plant flue gas waste heat recycling structure is provided for the utility model;

[0026] Figure 3 A structure schematic view of the cloth liquid pipe of a thermal power plant flue gas waste heat recycling structure is provided for the utility model;

[0027] Figure 4 A rear view three-dimensional drawing of a thermal power plant flue gas waste heat recycling structure is provided for the utility model.

[0028] Legend:

[0029] 1, box body, 2, inlet pipe, 3, heat exchange tube, 4, fin, 5, outlet pipe, 6, filter screen, 7, servo motor, 8, eccentric wheel, 9, connecting rod, 10, crankshaft, 11, knock rod, 12, cloth liquid pipe, 13, nozzle, 14, slider, 15, slide rail, 16, electric push rod, 17, liquid supply hose, 18, box cover, 19, joint, 20, liquid discharge valve. DETAILED DESCRIPTION

[0030] The technical solutions in the embodiments of the utility model will be described clearly and completely 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, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor belong to the scope of protection of the utility model.

[0031] REFERENCE Figures 1-3The utility model provides a kind of embodiment of power plant flue gas waste heat recycling structure, including box 1, for the passage of power plant boiler flue gas, one side fixedly connected with heat exchange tube 3 in the inside of box 1, it is snake-like, can increase the flow area of medium, and flue gas is heat exchanged to realize waste heat recycling, the surface of heat exchange tube 3 is fixedly connected with several fins 4, can increase surface area and heat transfer efficiency, improve heat exchange efficiency, the other side of the inside of box 1 is engaged with filter screen 6, can stop the particulate matter in flue gas, avoid adhering on heat exchange tube 3 and fin 4 to reduce heat exchange performance, the middle part of the inside of box 1 is installed knock component, for dredging filter screen 6 surface, avoid mesh hole be blocked by particulate matter in flue gas and influence the flow of gas, one end of the inside of box 1 is installed spray assembly, for spraying acetic acid solution to heat exchange structure surface, the top of box 1 is fixedly installed with box cover 18 by bolt, can be disassembled to facilitate maintenance to the inside of box 1;

[0032] Referring to Figure 3 , spray assembly includes liquid distribution pipe 12, several nozzles 13, two guide assemblies and electric push rod 16, two guide assemblies are connected to the top of one end of the two sides of the inner wall of box 1, liquid distribution pipe 12 is connected between the two guide assemblies, guide assembly can improve the stability when liquid distribution pipe 12 moves up and down, the surface of liquid distribution pipe 12 is uniformly fixedly connected with several nozzles 13, in horizontal direction, acetic acid solution can be evenly sprayed to heat exchange structure surface in umbrella shape, one end of the top of box cover 18 is fixedly installed with electric push rod 16, and the output end of electric push rod 16 is fixedly connected with liquid distribution pipe 12, liquid distribution pipe 12 moves up and down by electric push rod 16, to increase spray area, can effectively remove scale generated on heat exchange tube 3 and fin 4.

[0033] Referring to Figure 2 , knock component includes servo motor 7, eccentric wheel 8, connecting rod 9, crankshaft 10 and several knock rods 11, crankshaft 10 is rotatably connected to the top of the middle part of the inner wall of box 1 by bearing, the bottom of crankshaft 10 is uniformly fixedly connected with several knock rods 11, servo motor 7 is fixedly installed on the top of the middle part of the rear side of box 1, for driving knock component to operate, the output end of servo motor 7 is fixedly connected with eccentric wheel 8 through the inner wall of box 1, connecting rod 9 is rotatably connected to the surface of eccentric wheel 8, and one end of connecting rod 9 is rotatably connected with the bottom of crankshaft 10, eccentric wheel 8 rotates by starting servo motor 7, then under the transmission of connecting rod 9, crankshaft 10 swings back and forth, in turn, knock screen 6 by reciprocating knock rod 11, shake off the particulate matter adhered to its surface, play dredging effect.

[0034] Referring to Figure 3The guiding assembly comprises a sliding rail 15 and a sliding block 14, the sliding rail 15 is fixedly connected to the inner wall of the box body 1, the surface of the sliding rail 15 is slidingly connected with the sliding block 14, and the sliding block 14 is fixedly connected to one end of the liquid distribution pipe 12; the sliding block 14 and the sliding rail 15 play a guiding role on the movement of the liquid distribution pipe 12, so that the liquid distribution pipe 12 can be stably lifted and moved.

[0035] With reference to Figure 1 One end of the box body 1 is fixedly connected with an air inlet pipe 2, and the flue gas of the power plant boiler after the cooling treatment is input into the box body 1 from the air inlet pipe 2.

[0036] With reference to Figure 4 The end of the box body 1 away from the air inlet pipe 2 is fixedly connected with an air outlet pipe 5, and the flue gas of the boiler with residual heat is discharged from the air outlet pipe 5 after heat exchange.

[0037] With reference to Figure 3 And Figure 4 The top end of the liquid distribution pipe 12 is fixedly connected with a liquid supply hose 17, and the acetic acid solution can be input into the liquid distribution pipe 12 by using an external water pump and the liquid supply hose 17; the surface of the box cover 18 is provided with a hole corresponding to the liquid supply hose 17, so as to provide a space for the liquid supply hose 17 to pass through; and the design of the hose enables it to move along with the liquid distribution pipe 12.

[0038] With reference to Figure 4 The bottom of the side of the box body 1 close to the liquid distribution pipe 12 is fixedly connected with a liquid discharge valve 20, and the accumulated water and acetic acid solution in the box body 1 can be discharged by opening the liquid discharge valve 20.

[0039] With reference to Figure 4 The two ends of the heat exchange pipe 3 penetrate through the outer wall of the box body 1 and are fixedly connected with connectors 19, and the two ends of the heat exchange pipe 3 are connected with pipelines by using the connectors 19, for input and output of the heat exchange medium.

[0040] Working principle: the power plant boiler flue gas after cooling treatment from the air inlet pipe 2 into the box 1, while input into the heat exchange tube 3 heat transfer medium, when the flue gas flow, in the cooperation of the fin 4, can be flue gas and medium heat transfer, and then recover the waste heat of flue gas to improve energy utilization efficiency, by setting filter screen 6 in the front of the heat exchange structure, can block the particulate matter in the flue gas, avoid adhering to the heat exchange tube 3 and fin 4 to reduce the heat transfer performance, and can periodically start servo motor 7 driven eccentric wheel 8 rotation, in the transmission of connecting rod 9, crankshaft 10 reciprocating, and then use a plurality of knock rod 11 reciprocating knock filter screen 6, shake off the particles attached to its surface, play a dredging effect, can reduce the cleaning and maintenance frequency of filter screen 6, using external water pump and liquid supply hose 17 to input acetic acid solution into the liquid distribution pipe 12, and through a plurality of nozzles 13 evenly sprayed to the surface of the heat exchange structure, while starting the electric push rod 16, in the cooperation of the slider 14 and slide rail 15 drive nozzle 13 up and down to increase the spraying area, can effectively remove the scale generated on the heat exchange tube 3 and fin 4, to avoid affecting the normal operation of the heat transfer work.

[0041] Finally, it should be noted that: the above only for the preferred embodiments of the present application, and not for limiting the present application, although the foregoing detailed description of the present application, for the skilled in the art, it still can be modified, or part of the technical features of the equivalent replacement, within the spirit and principles of the present application, any modification, equivalent replacement, improvement, etc., should be included within the scope of the present application.

Claims

1. A flue gas waste heat recycling structure of a thermal power plant, comprising a box body (1), characterized in that: One side of the inside of the box (1) is fixedly connected with a heat exchange pipe (3), the surface of the heat exchange pipe (3) is fixedly connected with a plurality of fins (4), the other side of the inside of the box (1) is clamped with a filter screen (6), the middle of the inside of the box (1) is installed with a knocking assembly, one end of the inside of the box (1) is installed with a spraying assembly, the top of the box (1) is fixedly installed with a box cover (18) through bolts; The spraying assembly comprises a liquid distribution pipe (12), a plurality of nozzles (13), two guide assemblies and an electric push rod (16), two guide assemblies are connected to the top of one end of the inner wall of the box (1), a liquid distribution pipe (12) is connected between the two guide assemblies, a plurality of nozzles (13) are uniformly and fixedly connected to the surface of the liquid distribution pipe (12), one end of the top of the box cover (18) is fixedly installed with an electric push rod (16), and the output end of the electric push rod (16) is fixedly connected with the liquid distribution pipe (12).

2. The flue gas waste heat recycling structure of a thermal power plant according to claim 1, characterized in that: The knocking assembly comprises a servo motor (7), an eccentric wheel (8), a connecting rod (9), a crankshaft (10) and a plurality of knock rods (11), the crankshaft (10) is rotatably connected to the top of the middle of the inner wall of the box (1) through a bearing, a plurality of knock rods (11) are uniformly and fixedly connected to the bottom of the crankshaft (10), a servo motor (7) is fixedly installed on the top of the middle of the rear side of the box (1), the output end of the servo motor (7) is fixedly connected with an eccentric wheel (8) through the inner wall of the box (1), a connecting rod (9) is rotatably connected to the surface of the eccentric wheel (8), and one end of the connecting rod (9) is rotatably connected with the bottom of the crankshaft (10).

3. The flue gas waste heat recycling structure of a thermal power plant according to claim 1, characterized in that: The guide assembly comprises a sliding rail (15) and a sliding block (14), the sliding rail (15) is fixedly connected to the inner wall of the box (1), the surface of the sliding rail (15) is slidably connected with a sliding block (14), and one end of the sliding block (14) is fixedly connected to the liquid distribution pipe (12).

4. The flue gas waste heat recycling structure of a thermal power plant according to claim 1, characterized in that: One end of the box (1) is fixedly connected with an air inlet pipe (2).

5. The flue gas waste heat recycling structure of a thermal power plant according to claim 4, characterized in that: The end of the box (1) away from the air inlet pipe (2) is fixedly connected with an air outlet pipe (5).

6. The flue gas waste heat recycling structure of a thermal power plant according to claim 1, characterized in that: The top of the liquid distribution pipe (12) is fixedly connected with a liquid supply hose (17), and the surface of the box cover (18) is perforated corresponding to the liquid supply hose (17).

7. The flue gas waste heat recycling structure of a thermal power plant according to claim 1, characterized in that: The bottom of the side of the box (1) close to the liquid distribution pipe (12) is fixedly connected with a liquid discharge valve (20).

8. The flue gas waste heat recycling structure of a thermal power plant according to claim 1, characterized in that: The two ends of the heat exchange pipe (3) are fixedly connected with connectors (19) through the outer wall of the box (1).

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