A flue gas waste heat recovery device for the production and processing of expandable polystyrene

Abstract

The utility model belongs to the technical field of expandable polystyrene production, and is particularly a flue gas waste heat recovery device for expandable polystyrene production and processing, comprising a heat exchange box, and a box door rotatably connected to one side of the heat exchange box, wherein the inner upper part and the bottom of the heat exchange box are both rotatably connected with a gas collecting pipe, and the two gas collecting pipes are both connected with array-distributed heat exchange circular tubes, and the two corresponding upper and lower heat exchange circular tubes are connected with a special-shaped heat exchange pipe, wherein a gas collecting pipe at the bottom is rotatably connected with a flue gas inlet pipe, and a gas collecting pipe at the top extends to the top of the heat exchange box and is connected with an exhaust pipe. The utility model arranges a rotatable special-shaped heat exchange pipe in the heat exchange box, and the flue gas in the special-shaped heat exchange pipe is discharged through an arc-shaped jet pipe, which can generate a reverse thrust during discharge, thereby causing the special-shaped heat exchange pipe to rotate rapidly in the heat exchange box, thereby increasing the heat exchange effect, and solving the problem of poor heat exchange effect of the current device.

Description

Technical Field

[0001] The utility model relates to the technical field of expandable polystyrene production, in particular to a flue gas waste heat recovery device for the production and processing of expandable polystyrene. Background Art

[0002] Boiler equipment is required in the production and processing of expandable polystyrene. For example, in the devolatilization process, the heat transfer oil needs to be heated. The boiler will inevitably produce flue gas when in use. In order to reduce energy loss, the waste heat of the flue gas is generally recovered and utilized.

[0003] The heat recovery of flue gas is generally done by heating water or gas. When heating the gas, corresponding pipes need to be used. The flue gas circulates in the pipes and then heats the external gas. However, when recovering heat, the pipes are stationary and cannot move, so that the contact surface between the pipes and the outside air is single, and the contact between the pipes and the outside air cannot be frequent and fast. The heating effect is uneven and slow, so the heat exchange effect is not ideal. There are certain defects and shortcomings, which need to be improved. Utility Model Content

[0004] 1. Technical issues to be resolved

[0005] In view of the deficiencies in the prior art, the utility model provides a flue gas waste heat recovery device for the production and processing of expandable polystyrene. A rotatable special-shaped heat exchange pipe is arranged in a heat exchange box, and the flue gas in the special-shaped heat exchange pipe is discharged through an arc-shaped jet pipe. When discharged, a reverse thrust force is generated, which causes the special-shaped heat exchange pipe to rotate rapidly in the heat exchange box, thereby accelerating the contact between the pipe and the air, and then increasing the heat exchange effect, thereby solving the problem of poor heat exchange effect of the current device.

[0006] (II) Technical solution

[0007] In order to achieve the above-mentioned purpose, the utility model specifically adopts the following technical solutions:

[0008] A flue gas waste heat recovery device for the production and processing of expandable polystyrene comprises a heat exchange box and a box door rotatably connected to one side of the heat exchange box, wherein the inner upper part and the bottom of the heat exchange box are rotatably connected with gas collecting pipes, and the two gas collecting pipes are connected with heat exchange circular tubes distributed in an array, and a special-shaped heat exchange pipe is connected between the two corresponding upper and lower heat exchange circular tubes, wherein a flue gas inlet pipe is rotatably connected to a gas collecting pipe at the bottom, and an upper gas collecting pipe extends to the top of the heat exchange box and is connected with an exhaust pipe, and the side wall of the exhaust pipe is connected with arc-shaped injection pipes distributed in an array, and exhaust heads are provided at the ends of the arc-shaped injection pipes.

[0009] Furthermore, the special-shaped heat exchange pipe includes a special-shaped tube body connected between two heat exchange circular tubes, and the inner side of the special-shaped tube body is fixedly connected with a guide plate 1 and a guide plate 2 distributed at intervals, and a guide groove 1 is provided on one side of the guide plate 1, and a guide groove 2 is provided on one side of the guide plate 2.

[0010] Furthermore, the top and the bottom of the special-shaped tube body are both provided with air holes, and the special-shaped tube body is connected to the corresponding heat exchange circular tube through the air holes.

[0011] Furthermore, the cross-sectional shape of the special-shaped pipe body is a triangle.

[0012] Furthermore, a filter cartridge is fixed on the upper surface of the heat exchange box outside the arc-shaped air injection pipe, and a filter screen is fixedly connected to the inner side of the filter cartridge, and a cartridge cover arranged on the top of the filter cartridge is connected to a smoke exhaust pipe.

[0013] Furthermore, a fresh air inlet pipe is arranged at the bottom of one side of the heat exchange box, a hot air outlet pipe is arranged at the upper part of the other side of the heat exchange box, and a supporting leg is fixedly connected to the lower surface of the heat exchange box.

[0014] (III) Beneficial effects

[0015] Compared with the prior art, the utility model provides a flue gas waste heat recovery device for the production and processing of expandable polystyrene, which has the following beneficial effects:

[0016] 1. The utility model arranges an air collecting pipe at the top and bottom of the inner side of the heat exchange box, connects a plurality of circular heat exchange tubes on the air collecting pipe, and connects special-shaped heat exchange pipes on the corresponding circular heat exchange tubes above and below. The flue gas is discharged through the circular heat exchange tubes, the special-shaped heat exchange pipes, the air collecting pipe, and the arc-shaped jet pipe. When discharged, a reverse thrust is generated to rotate the air collecting pipe, the circular heat exchange tube, and the special-shaped heat exchange pipe. When the special-shaped heat exchange pipe rotates, the contact between the pipe and the air is accelerated, thereby realizing uniform and rapid heating of the gas in the heat exchange box, increasing the heat exchange efficiency, improving the level of flue gas waste heat recovery, and avoiding waste.

[0017] 2. The utility model fixes the filter cartridge on the upper surface of the heat exchange box, so that the filter cartridge can filter the flue gas. At the same time, the gas ejected from the arc-shaped jet pipe hits the inner wall of the filter cartridge to form a better reverse thrust, so that the special-shaped heat exchange pipe rotates quickly. The inner side of the special-shaped heat exchange pipe is provided with a guide plate 1 and a guide plate 2 which are spaced apart, so as to increase the residence time of the flue gas and improve the use effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the structure of the utility model;

[0019] Figure 2It is a cross-sectional schematic diagram of the special-shaped heat exchange pipe in the utility model.

[0020] In the figure: 1. heat exchange box; 2. special-shaped heat exchange pipe; 201. special-shaped pipe body; 202. guide plate 1; 203. guide plate 2; 204. air hole; 205. guide groove 1; 206. guide groove 2; 3. fresh air inlet pipe; 4. flue gas inlet pipe; 5. supporting leg; 6. heat exchange circular pipe; 7. air collecting pipe; 8. box door; 9. hot air outlet pipe; 10. exhaust pipe; 11. arc jet pipe; 12. filter screen; 13. filter cartridge; 14. flue gas exhaust pipe. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0022] Example

[0023] like Figure 1 As shown, an embodiment of the utility model proposes a flue gas waste heat recovery device for the production and processing of expandable polystyrene, comprising a heat exchange box 1, and a box door 8 rotatably connected to one side of the heat exchange box 1, the inner upper part and the bottom of the heat exchange box 1 are rotatably connected with a collecting pipe 7, the two collecting pipes 7 are connected with an array of heat exchange circular tubes 6, and the two corresponding upper and lower heat exchange circular tubes 6 are connected with a special-shaped heat exchange pipe 2, wherein a flue gas inlet pipe 4 is rotatably connected to a collecting pipe 7 at the bottom, and an upper collecting pipe 7 extends to the top of the heat exchange box 1 and is connected with an exhaust pipe 10, and the side wall of the exhaust pipe 10 is connected with an array of arc-shaped injection pipes 11, and the ends of the arc-shaped injection pipes 11 are provided with exhaust heads.

[0024] It should be noted that the setting of the box door 8 can realize the outer side protection of the heat exchange box 1. By arranging the air collecting pipe 7 at the upper part and the bottom part of the heat exchange box 1, the air collecting pipe 7 is rotatably connected to the heat exchange box 1 and can rotate. The flue gas is discharged through the flue gas inlet pipe 4, the air collecting pipe 7, the heat exchange circular tube 6 and the special-shaped heat exchange pipe 2 in sequence. When the air collecting pipe 7 rotates, the special-shaped heat exchange pipe 2 and the heat exchange circular tube 6 rotate accordingly. By connecting the exhaust pipe 10 to an upper air collecting pipe 7 and arranging an arc-shaped injection pipe 11 on the side wall of the exhaust pipe 10, the flue gas is ejected through the exhaust head arranged at the end of the arc-shaped injection pipe 11. When ejecting, a reverse thrust force can be generated, thereby causing the special-shaped heat exchange pipe 2, the heat exchange circular tube 6 and the air collecting pipe 7 to rotate on the heat exchange box 1. When rotating, the contact between the outer surface of the special-shaped heat exchange pipe 2 and the gas inside the heat exchange box 1 can be accelerated, thereby realizing rapid heating of the gas and increasing the heat exchange effect.

[0025] like Figure 1 and Figure 2 As shown, in some embodiments, the special-shaped heat exchange pipe 2 includes a special-shaped tube body 201 connected between two heat exchange circular tubes 6, and the inner side of the special-shaped tube body 201 is fixedly connected with a guide plate 1 202 and a guide plate 2 203 that are spaced apart, and a guide groove 1 205 is provided on one side of the guide plate 1 202, and a guide groove 2 206 is provided on one side of the guide plate 203.

[0026] It should be noted that by arranging guide plates 1 202 and guide plates 2 203 at intervals on the inner side of the special-shaped tube body 201, the flue gas in the special-shaped tube body 201 flows from top to bottom through guide groove 1 205 and guide groove 2 206 in turn, which can extend the discharge time of the flue gas from the expandable polystyrene boiler, so that the heat of the flue gas can fully contact the gas, thereby increasing the heat exchange efficiency.

[0027] like Figure 1 and Figure 2 As shown, in some embodiments, air holes 204 are provided on the top and the bottom of the special-shaped tube body 201 , and the special-shaped tube body 201 is connected to the corresponding heat exchange circular tube 6 through the air holes 204 .

[0028] It should be noted that, by providing the air hole 204 at the end of the special-shaped tube body 201 , the connection between the special-shaped tube body 201 and the heat exchange circular tube 6 is facilitated.

[0029] like Figure 2 As shown, in some embodiments, the cross-sectional shape of the special-shaped pipe body 201 is a triangle.

[0030] It should be noted that the shape of the special-shaped tube body 201 is designed to be a triangle. When the special-shaped tube body 201 rotates, it can reduce the resistance between it and the air, thereby making the special-shaped heat exchange pipe 2 rotate quickly, reducing the influence of air resistance on the special-shaped heat exchange pipe 2, thereby ensuring the rotation speed of the special-shaped heat exchange pipe 2.

[0031] like Figure 1 As shown, in some embodiments, a filter cartridge 13 is fixed on the outer side of the arc-shaped air injection pipe 11 on the upper surface of the heat exchange box 1, and a filter screen 12 is fixedly connected to the inner side of the filter cartridge 13, and a cartridge cover arranged on the top of the filter cartridge 13 is connected to a flue gas exhaust pipe 14.

[0032] It should be noted that by fixing the filter cartridge 13 on the upper surface of the heat exchange box 1, on the one hand, the gas can be filtered through the filter mesh 12 in the filter cartridge 13; secondly, when the arc-shaped jet pipe 11 sprays smoke, the smoke contacts the inner wall of the filter cartridge 13, and the reverse thrust is large, thereby ensuring the rotation speed of the special-shaped heat exchange pipe 2, the heat exchange circular tube 6 and the gas collecting pipe 7.

[0033] like Figure 1 As shown, in some embodiments, a fresh air inlet pipe 3 is provided at the bottom of one side of the heat exchange box 1, a hot air outlet pipe 9 is provided at the upper part of the other side of the heat exchange box 1, and a support leg 5 is fixedly connected to the lower surface of the heat exchange box 1.

[0034] It should be noted that in actual use, air enters the inner side of the heat exchange box 1 through the fresh air inlet pipe 3 and is discharged through the hot air outlet pipe 9 after being heated.

[0035] Finally, it should be noted that the above description is only a preferred embodiment of the utility model and is not intended to limit the utility model. Although the utility model is described in detail with reference to the above embodiments, those skilled in the art can still modify the technical solutions recorded in the above embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A flue gas waste heat recovery device for the production and processing of expandable polystyrene, comprising a heat exchange box (1), and a box door (8) rotatably connected to one side of the heat exchange box (1), characterized in that: The upper inner part and the bottom inner part of the heat exchange box (1) are both rotatably connected to a gas collecting pipe (7), and the two gas collecting pipes (7) are both connected to a heat exchange circular tube (6) distributed in an array, and the two corresponding heat exchange circular tubes (6) are connected to a special-shaped heat exchange pipe (2), wherein a flue gas inlet pipe (4) is rotatably connected to a gas collecting pipe (7) at the bottom, and an upper gas collecting pipe (7) extends to the top of the heat exchange box (1) and is connected to an exhaust pipe (10), and the side wall of the exhaust pipe (10) is connected to an arc-shaped jet pipe (11) distributed in an array, and exhaust headers are provided at the ends of the arc-shaped jet pipes (11).

2. The flue gas waste heat recovery device for the production and processing of expandable polystyrene according to claim 1, characterized in that: The special-shaped heat exchange pipe (2) comprises a special-shaped pipe body (201) connected between two heat exchange circular pipes (6), and the inner side of the special-shaped pipe body (201) is fixedly connected with a guide plate 1 (202) and a guide plate 2 (203) distributed at intervals, and a guide groove 1 (205) is arranged on one side of the guide plate 1 (202), and a guide groove 2 (206) is arranged on one side of the guide plate 2 (203).

3. The flue gas waste heat recovery device for the production and processing of expandable polystyrene according to claim 2, characterized in that: The top and bottom of the special-shaped tube body (201) are both provided with air holes (204), and the special-shaped tube body (201) is connected to the corresponding heat exchange circular tube (6) through the air holes (204).

4. The flue gas waste heat recovery device for the production and processing of expandable polystyrene according to claim 3, characterized in that: The cross-sectional shape of the special-shaped pipe body (201) is a triangle.

5. The flue gas waste heat recovery device for the production and processing of expandable polystyrene according to claim 1, characterized in that: A filter cartridge (13) is fixed on the upper surface of the heat exchange box (1) outside the arc-shaped air injection pipe (11), and a filter screen (12) is fixedly connected to the inner side of the filter cartridge (13). A cartridge cover arranged on the top of the filter cartridge (13) is connected to a smoke exhaust pipe (14).

6. The flue gas waste heat recovery device for the production and processing of expandable polystyrene according to claim 1, characterized in that: A fresh air inlet pipe (3) is arranged at the bottom of one side of the heat exchange box (1), a hot air outlet pipe (9) is arranged at the upper part of the other side of the heat exchange box (1), and a support leg (5) is fixedly connected to the lower surface of the heat exchange box (1).

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