Air-cooled heat exchanger

Abstract

The utility model provides an air-cooled heat exchanger which comprises a box body, an upper bin is installed above the box body, a dry ice cleaning machine is fixedly connected to the upper portion of the upper bin, one end of the dry ice cleaning machine is fixedly connected with a flow dividing connector through a pipeline, one end of the flow dividing connector is rotationally connected with a plurality of cleaning sprayers, and one ends of the cleaning sprayers are fixedly connected with gears. One end of the gear is rotatably connected with a cleaning supporting plate, one end of the cleaning supporting plate is slidably connected with a lifting assembly, and the lifting assembly comprises a lifting support, a shear fork frame assembly and a first electric lead screw, one end of the first electric lead screw is fixedly connected to the inner wall of the upper portion of the upper bin, and one end of the shear fork frame assembly is movably connected to the lifting support. The other end of the shear fork frame assembly is movably connected to the inner wall of the upper bin; the cleaning nozzles can move downwards through deformation of the shear fork frame assembly when the first electric lead screw rotates, the cleaning nozzles swinging left and right can clean dirt on the heat dissipation plates on the two sides, the dry ice cleaning effect is better, and excessive residues are avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of air-cooled heat exchangers, in particular to an air-cooled heat exchanger. Background Art

[0002] Desulfurization and denitrification are environmental protection measures aimed at reducing the emission of sulfur dioxide (SO2) and nitrogen oxides (NOx) in flue gas to prevent environmental pollution. If these two substances are not treated, they may form acid rain after entering the atmosphere, causing serious impacts on the environment and human health. The common practice in industry is to reduce the generation of nitrogen oxides by controlling the combustion temperature, air concentration and the residence time of the fuel in the burner during the combustion process, and to remove sulfur dioxide and nitrogen oxides through various methods such as alkali absorption and selective catalytic reduction after combustion. In the post-combustion treatment process, the flue gas needs to be cooled before treatment to maximize the treatment effect. Traditional cooling methods are mostly water-cooled heat exchangers, but scale is easily accumulated in the S-shaped pipes of water-cooled heat exchangers, which have high requirements for water quality, are costly to use and waste water resources. When air-cooled heat exchangers are desulfurized and denitrified by limestone-gypsum wet flue gas desulfurization technology, scale composed of limestone and gypsum will accumulate on the heat exchange tubes, resulting in blockage inside the heat exchanger and poor heat exchange effect.

[0003] After searching, the Chinese patent publication number CN114877731A discloses a high-efficiency heat exchanger for desulfurization and denitrification, including a heat exchanger shell, smoke guide pipes are fixedly installed on both sides of the heat exchanger shell, a plurality of heat pipes are vertically fixedly installed in the heat exchanger shell, an up and down floating mechanism is fixedly connected in the heat pipe, and a plurality of scraper rings are slidably connected to the heat pipe.

[0004] Aiming at the problem existing in the above technology that it is difficult to effectively clean the structure of the generated limestone and gypsum components only by a scraper ring, an air-cooled heat exchanger is proposed. Utility Model Content

[0005] In view of this, the embodiments of the present invention hope to provide an air-cooled heat exchanger to solve or alleviate the technical problems existing in the prior art and at least provide a beneficial choice.

[0006] The technical solution of the embodiment of the utility model is achieved as follows: it includes a box body with an upper bin installed on the top, a dry ice cleaning machine is fixedly connected to the top of the upper bin, one end of the dry ice cleaning machine is fixedly connected to a diversion interface through a pipeline, one end of the diversion interface is rotatably connected to multiple cleaning nozzles, one end of the cleaning nozzle is fixedly connected to a gear, one end of the gear is rotatably connected to a cleaning support plate, and one end of the cleaning support plate is slidably connected to a lifting component.

[0007] In some embodiments, the lifting assembly includes a lifting bracket, a scissors frame assembly, and an electric screw rod. One end of the electric screw rod is fixedly connected to the upper inner wall of the upper bin, one end of the scissors frame assembly is movably connected to the lifting bracket, the other end of the scissors frame assembly is movably connected to the inner wall of the upper bin, and one end of the lifting bracket is slidably connected to the top of the cleaning support plate.

[0008] In some embodiments, a cooling pipe is fixedly connected to the interior of the box, and one end of the cooling pipe is fixedly connected to a plurality of heat dissipation plates.

[0009] In some embodiments, an air inlet is fixedly connected to one end of the box, and an exhaust port is fixedly connected to the other side of the box.

[0010] In some embodiments, one end of the lifting bracket is fixedly connected to the second electric screw and the sliding rod, one end of the cleaning support plate is slidably connected to the sliding rod, and the other end of the cleaning support plate is threadedly connected to the movable end of the second electric screw.

[0011] In some embodiments, one end of the cleaning support plate is slidably connected to a rack, and one end of the rack is drivingly connected to a gear.

[0012] In some embodiments, both ends of the rack are fixedly connected to a changing ramp, one end of the cleaning support plate is provided with an extrusion groove, the bottom of the box is fixedly connected to a trigger ramp, and the top of the box is rotatably connected to an extrusion roller.

[0013] In some embodiments, a shielding plate is fixedly connected below the lifting bracket, and a plurality of through slots are opened at one end of the shielding plate.

[0014] The embodiment of the utility model has the following advantages due to the adoption of the above technical solution:

[0015] 1. An air-cooled heat exchanger, through the cleaning nozzle can be rotated by the electric screw rod through the deformation of the scissor frame assembly to achieve downward movement, the left and right swinging cleaning nozzle can clean the dirt on the heat dissipation plates on both sides, the dry ice cleaning effect is better and there will not be too much residue.

[0016] 2. An air-cooled heat exchanger can clean dirt of different depths on the heat sink through a cleaning nozzle that can move forward and backward, thereby increasing the cleaning range.

[0017] 3. An air-cooled heat exchanger can automatically change the cleaning direction when the cleaning nozzle moves to the bottom and the top by triggering the inclined platform and the squeezing roller, without the need for manual adjustment of the swing cleaning nozzle.

[0018] The above summary is for the purpose of description only and is not intended to be limiting in any way. In addition to the illustrative aspects, embodiments and features described above, further aspects, embodiments and features of the utility model will be readily apparent by reference to the accompanying drawings and the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or technical descriptions will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0020] Figure 1 This is the main structural diagram of the utility model;

[0021] Figure 2 This is a partial structural diagram of the inner wall of the top of the box body of the utility model;

[0022] Figure 3 This is the internal structure diagram of the upper bin of the utility model;

[0023] Figure 4 This is a structural diagram of the cleaning nozzle installation of the utility model;

[0024] Figure 5 This is a side view of the internal structure of the upper bin of the utility model;

[0025] Figure 6 This is the installation structure diagram of the inspection frame of the utility model.

[0026] Reference numerals:

[0027] 1. Box body; 2. Air inlet; 3. Exhaust outlet; 4. Cooling pipe; 5. Heat sink; 6. Trigger ramp; 7. Upper compartment; 8. Dry ice cleaning machine; 9. Shielding plate; 10. Extrusion roller; 11. Lifting bracket; 12. Scissor frame assembly; 13. Electric screw 1; 14. Cleaning support plate; 15. Rack; 16. Diverter interface; 17. Cleaning nozzle; 18. Gear; 19. Through slot; 20. Electric screw 2; 21. Sliding rod; 22. Changing ramp; 23. Extrusion slot. DETAILED DESCRIPTION

[0028] In the following, only some exemplary embodiments are briefly described. As those skilled in the art will appreciate, the described embodiments may be modified in various ways without departing from the spirit or scope of the present invention. Therefore, the drawings and descriptions are considered to be exemplary and non-restrictive in nature.

[0029] The embodiments of the present utility model are described in detail below with reference to the accompanying drawings.

[0030] Embodiment 1:

[0031] like Figure 1-6As shown, an air-cooled heat exchanger comprises a box body 1 with an upper bin 7 installed on the top, a dry ice cleaning machine 8 is fixedly connected to the top of the upper bin 7, one end of the dry ice cleaning machine 8 is fixedly connected to a diversion interface 16 through a pipeline, one end of the diversion interface 16 is rotatably connected to a plurality of cleaning nozzles 17, one end of the cleaning nozzle 17 is fixedly connected to a gear 18, one end of the gear 18 is rotatably connected to a cleaning support plate 14, and one end of the cleaning support plate 14 is slidably connected to a lifting component;

[0032] The lifting assembly includes a lifting bracket 11, a scissor frame assembly 12, and an electric screw rod 13, one end of the electric screw rod 13 is fixedly connected to the upper inner wall of the upper bin 7, one end of the scissor frame assembly 12 is movably connected to the lifting bracket 11, and the other end of the scissor frame assembly 12 is movably connected to the inner wall of the upper bin 7, and one end of the lifting bracket 11 is slidably connected to the top of the cleaning support plate 14;

[0033] The dry ice cleaning machine 8 can spray granular dry ice through the cleaning nozzle 17. When the high-speed granular dry ice hits the dirt, it will spray the dirt down for cleaning like sand blasting. Then the dry ice will evaporate and be discharged to prevent sand from accumulating in the device.

[0034] The cleaning nozzle 17 can move downward through the deformation of the scissor frame assembly 12 when the electric screw rod 13 rotates, and the cleaning nozzle 17 swinging left and right can clean the dirt on both sides.

[0035] In this embodiment, a cooling tube 4 is fixedly connected to the inside of the box body 1, and a plurality of heat sinks 5 are fixedly connected to one end of the cooling tube 4. An air inlet 2 is fixedly connected to one end of the box body 1, and an exhaust port 3 is fixedly connected to the other side of the box body 1. Low-temperature gas passes through the inside of the cooling tube 4. When the flue gas entering from the air inlet 2 contacts the heat sink 5, the temperature will be lowered, and dirt will accumulate on the surface of the heat sink 5. The cleaning nozzle 17 that moves up and down is located between the two heat sinks 5, and the cleaning nozzle 17 that swings left and right can clean both sides of the heat sink 5.

[0036] In this embodiment, one end of the lifting bracket 11 is fixedly connected to the electric screw 20 and the slide bar 21, one end of the cleaning support plate 14 is slidably connected to the slide bar 21, and the other end of the cleaning support plate 14 is threadedly connected to the movable end of the electric screw 20;

[0037] When the electric screw rod 20 rotates, the cleaning support plate 14 can be controlled to move forward and backward, thereby changing the position of the cleaning nozzle 17, so as to achieve the effect of cleaning dirt of different depths on the heat sink 5 and improve the cleaning range.

[0038] In this embodiment, one end of the cleaning support plate 14 is slidably connected to a rack 15, and one end of the rack 15 is drivingly connected to a gear 18. The rack 15 can move back and forth and drive all the cleaning nozzles 17 to swing and adjust the cleaning position.

[0039] In this embodiment: the dry ice cleaning machine 8 can spray granular dry ice through the cleaning nozzle 17. When the high-speed granular dry ice hits the dirt, it will spray the dirt down for cleaning like sand blasting. Then the dry ice will evaporate and be discharged to prevent sand from accumulating in the device.

[0040] The cleaning nozzle 17 can move downward through the deformation of the scissor frame assembly 12 when the electric screw rod 13 rotates, and the rack 15 can move back and forth, while driving all the cleaning nozzles 17 to swing and adjust the cleaning position. The cleaning nozzles 17 that swing left and right can clean the dirt on both sides;

[0041] Low-temperature gas passes through the cooling tube 4. When the flue gas entering from the air inlet 2 contacts the heat sink 5, the temperature will be lowered. At the same time, dirt will accumulate on the surface of the heat sink 5. The cleaning nozzle 17 that moves up and down is located between the two heat sinks 5. The cleaning nozzle 17 that swings left and right can clean both sides of the heat sink 5.

[0042] When the electric screw rod 20 rotates, the cleaning support plate 14 can be controlled to move forward and backward, thereby changing the position of the cleaning nozzle 17, so as to achieve the effect of cleaning dirt of different depths on the heat sink 5 and improve the cleaning range.

[0043] Embodiment 2:

[0044] An air-cooled heat exchanger, this embodiment makes the following improvements on the basis of embodiment 1, such as Figure 1-6 As shown,

[0045] In this embodiment, the two ends of the rack 15 are fixedly connected with a direction-changing ramp 22, one end of the cleaning support plate 14 is provided with an extrusion groove 23, the bottom of the box body 1 is fixedly connected with a trigger ramp 6, and the top of the box body 1 is rotatably connected with an extrusion roller 10;

[0046] When the lifting bracket 11 moves to the bottom, the trigger ramp 6 will squeeze the changing ramp 22 at one end of the rack 15 to change the direction of the cleaning nozzle 17. When the lifting bracket 11 moves to the top, the changing ramp 22 at one end of the extrusion rack 15 will contact the extrusion roller 10, and then be squeezed to change the direction of the cleaning nozzle 17. There is no need to manually adjust the swinging cleaning nozzle 17.

[0047] In this embodiment, a baffle plate 9 is fixedly connected to the bottom of the lifting bracket 11, and a plurality of through slots 19 are opened at one end of the baffle plate 9. The baffle plate 9 can prevent the smoke from entering the upper bin 7 when the smoke is cooled, and the through slots 19 can prevent the heat sink 5 from getting stuck on the baffle plate 9.

[0048] The above is only a specific implementation of the utility model, but the protection scope of the utility model is not limited thereto. Any technician familiar with the technical field can easily think of various changes or substitutions within the technical scope disclosed by the utility model, which should be included in the protection scope of the utility model. Therefore, the protection scope of the utility model should be based on the protection scope of the claims.

Claims

1. An air-cooled heat exchanger, comprising a box (1) with an upper bin (7) mounted on top, characterized in that: A dry ice cleaning machine (8) is fixedly connected above the upper bin (7); one end of the dry ice cleaning machine (8) is fixedly connected to a diversion interface (16) via a pipeline; one end of the diversion interface (16) is rotatably connected to a plurality of cleaning nozzles (17); one end of the cleaning nozzle (17) is fixedly connected to a gear (18); one end of the gear (18) is rotatably connected to a cleaning support plate (14); one end of the cleaning support plate (14) is slidably connected to a lifting assembly.

2. The air-cooled heat exchanger according to claim 1, characterized in that: The lifting assembly comprises a lifting bracket (11), a scissor frame assembly (12), and an electric screw rod (13); one end of the electric screw rod (13) is fixedly connected to the upper inner wall of the upper bin (7); one end of the scissor frame assembly (12) is movably connected to the lifting bracket (11); the other end of the scissor frame assembly (12) is movably connected to the inner wall of the upper bin (7); and one end of the lifting bracket (11) is slidably connected to the top of the cleaning support plate (14).

3. The air-cooled heat exchanger according to claim 1, characterized in that: A cooling pipe (4) is fixedly connected inside the box body (1), and one end of the cooling pipe (4) is fixedly connected to a plurality of heat dissipation plates (5).

4. The air-cooled heat exchanger according to claim 3, characterized in that: One end of the box body (1) is fixedly connected to an air inlet (2), and the other side of the box body (1) is fixedly connected to an air outlet (3).

5. The air-cooled heat exchanger according to claim 2, characterized in that: One end of the lifting bracket (11) is fixedly connected to the second electric screw (20) and the sliding rod (21), one end of the cleaning support plate (14) is slidably connected to the sliding rod (21), and the other end of the cleaning support plate (14) is threadedly connected to the movable end of the second electric screw (20).

6. The air-cooled heat exchanger according to claim 5, characterized in that: One end of the cleaning support plate (14) is slidably connected to a rack (15), and one end of the rack (15) is drivingly connected to a gear (18).

7. The air-cooled heat exchanger according to claim 6, characterized in that: The two ends of the rack (15) are fixedly connected to a direction-changing ramp (22), one end of the cleaning support plate (14) is provided with an extrusion groove (23), the bottom of the box (1) is fixedly connected to a trigger ramp (6), and the top of the box (1) is rotatably connected to an extrusion roller (10).

8. The air-cooled heat exchanger according to claim 5, characterized in that: A shielding plate (9) is fixedly connected below the lifting bracket (11), and a plurality of through slots (19) are formed at one end of the shielding plate (9).

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