Ceramic production waste heat recovery device

Abstract

The utility model relates to a ceramic production waste heat recovery device which comprises a heat exchanger, the heat exchanger comprises a shell, a supporting pore plate, a heat exchange pipe, a cold water outlet pipe, a cold water inlet pipe, a flue gas inlet pipe and a flue gas outlet pipe, a limiting supporting ring is fixed on the inner wall of the lower portion of the shell, an annular distribution pipe is fixed on the top of the limiting supporting ring, and the flue gas outlet pipe is connected with a spraying cooling tower. A vortex-shaped gas distribution pipe is fixed at the right end of the flue gas outlet pipe, gas outlet holes are uniformly formed in the bottom of the gas distribution pipe, a filler layer and a vortex-shaped spray pipe are arranged above the gas distribution pipe, spray heads are uniformly arranged at the bottom of the spray pipe, and the spray pipe is connected with a liquid inlet pipe. Flue gas entering the heat exchanger can be uniformly distributed through the annular distribution pipe, so that the flue gas can better exchange heat with cold water in the heat exchange pipe, the waste heat recovery effect is better, the flue gas discharged from the flue gas outlet pipe can enter the spray cooling tower to be sprayed, the temperature is further reduced, and the waste heat recovery efficiency is improved. The influence on the service life of waste gas treatment equipment due to overhigh smoke temperature is prevented.

Description

Technical Field

[0001] The utility model relates to a waste heat recovery device for ceramic production, belonging to the technical field of waste heat recovery. Background Art

[0002] Ceramics are made of clay and fired at high temperatures in special kilns. During the production of ceramics, a large amount of high-heat waste flue gas is generated. If these waste flue gases are directly introduced into the waste gas treatment equipment without waste heat recovery, it will cause heat energy waste and be detrimental to the use of waste flue gas treatment equipment. At present, waste flue gas is introduced into the heat exchanger for heat exchange to recover part of the heat energy. However, due to the uneven entry of flue gas, the heat exchange effect is not good, and the waste flue gas after heat exchange directly enters the waste gas treatment equipment. The residual temperature in the flue gas will affect the service life of the treatment equipment. Utility Model Content

[0003] The utility model provides a waste heat recovery device for ceramic production, which solves the problem that the current device has poor heat exchange effect due to uneven flue gas entry, and the waste flue gas after heat exchange directly enters the waste gas treatment equipment, and the residual temperature in the flue gas will affect the service life of the treatment equipment.

[0004] The utility model relates to a waste heat recovery device for ceramic production, comprising a heat exchanger, the heat exchanger comprising a shell, supporting orifice plates are fixed up and down in the shell, a plurality of heat exchange tubes are fixed between the upper and lower supporting orifice plates, a cold water outlet pipe is provided on the top of the shell, a cold water inlet pipe is provided at the bottom of the shell, a smoke inlet pipe and a smoke outlet pipe are connected to the upper and lower parts of the shell respectively, the cold water outlet pipe is connected to a reboiler, a limited support ring is fixed on the inner wall of the lower part of the shell, an annular distribution pipe is fixed on the top of the limited support ring, smoke outlet holes are evenly arranged on the inner side wall of the annular distribution pipe, the annular distribution pipe is fixedly connected to the smoke inlet pipe, the smoke outlet pipe is connected to a spray cooling tower, a liquid outlet pipe and an air outlet pipe are respectively arranged at the bottom and the top of the spray cooling tower, a vortex-shaped air distribution pipe is fixed at the right end of the smoke outlet pipe, the bottom of the air distribution pipe is evenly provided with air outlet holes, a packing layer is provided above the air distribution pipe, a vortex-shaped spray pipe is provided above the packing layer, nozzles are evenly arranged at the bottom of the spray pipe, and the spray pipe is connected to the liquid inlet pipe.

[0005] As a preferred embodiment, a positioning boss is provided on the top of the limiting support ring, and a positioning blind hole is provided on the bottom of the annular distribution pipe to cooperate with the positioning boss. The smoke outlet of the annular distribution ring pipe can be quickly positioned by using the positioning boss and the positioning blind hole, so that the smoke outlet avoids the peripheral heat exchange tubes, so that the smoke can better contact the middle heat exchange tube.

[0006] As a preferred embodiment, the left end of the smoke inlet pipe is connected to the smoke delivery pipe, the right end of the smoke delivery pipe is provided with a connecting flange on the outside, a plurality of openings are evenly arranged on the outer wall of the connecting flange, a locking bolt is arranged in the opening, a fixing seat is hinged at the right end of the locking bolt, a locking ring is fixed on the inner side of the fixing seat, the locking ring is sleeved on the smoke inlet pipe, a limiting boss of the limiting locking ring is arranged on the outer side of the left end of the smoke inlet pipe, a supporting groove is arranged on the inner side of the left end of the smoke inlet pipe, a filter is arranged in the supporting groove, and a pressing boss for pressing the outer side of the filter is arranged on the inner side of the right end of the smoke delivery pipe. The filter can be used to filter out impurities in the smoke to prevent the impurities from affecting the subsequent heat exchange of the smoke, and the connection between the smoke inlet pipe and the smoke delivery pipe can be quickly and conveniently disassembled, and the filter can be taken out for cleaning.

[0007] As a preferred embodiment, the filter screen is arc-shaped, and a collecting groove is provided in the middle of the filter screen, so that the impurities filtered by the filter screen can be collected in the collecting groove, thereby increasing the service life of the filter screen.

[0008] As a preferred embodiment, a sealing ring is provided on the contact surface of the smoke delivery pipe and the smoke inlet pipe, and a bellows is provided on the smoke inlet pipe. The provision of the bellows makes it easier to disassemble the smoke inlet pipe and the smoke delivery pipe, and the filter can be easily taken out and put in.

[0009] The utility model has the following beneficial effects:

[0010] The flue gas entering the heat exchanger can be evenly distributed through the annular distribution pipe, so that the flue gas can better exchange heat with the cold water in the heat exchange tube, and the waste heat recovery effect is better. The flue gas coming out of the flue gas outlet pipe can enter the spray cooling tower for spraying to further cool it down, preventing the flue gas temperature from being too high and affecting the service life of the exhaust gas treatment equipment. Spraying can also remove some harmful substances in the flue gas. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a schematic diagram of the structure of the utility model;

[0012] Figure 2 This is a schematic diagram of the bottom structure of the air distribution pipe;

[0013] Figure 3 Schematic diagram of the bottom structure of the spray pipe;

[0014] Figure 4 for Figure 1 A schematic diagram of the enlarged structure at A in the middle;

[0015] Figure 5 for Figure 1 A schematic diagram of the enlarged structure at B in the middle;

[0016] In the figure: 1. limit support ring; 2. cold water inlet pipe; 3. support orifice plate; 4. annular distribution pipe; 5. heat exchange tube; 6. shell; 7. flue gas outlet pipe; 8. reboiler; 9. gas distribution pipe; 10. spray cooling tower; 11. packing layer; 12. nozzle; 13. spray pipe; 14. liquid inlet pipe; 15. cold water outlet pipe; 16. air outlet; 17. opening; 18. locking bolt; 19. smoke conveying pipe; 20. positioning boss; 21. smoke outlet; 22. smoke inlet pipe; 23. bellows; 24. locking ring; 25. filter. DETAILED DESCRIPTION

[0017] The utility model is further described below in conjunction with embodiments.

[0018] Embodiment 1, as Figures 1 to 5 As shown, the utility model is a waste heat recovery device for ceramic production, including a heat exchanger, the heat exchanger including a shell 6, a support orifice plate 3 is fixed in the upper and lower parts of the shell 6, a plurality of heat exchange tubes 5 are fixed between the upper and lower support orifice plates 3, a cold water outlet pipe 15 is provided at the top of the shell 6, a cold water inlet pipe 2 is provided at the bottom of the shell 6, a flue gas inlet pipe 22 and a flue gas outlet pipe 7 are connected to the upper and lower parts of the shell 6, the cold water outlet pipe 15 is connected to a reboiler 8, a limited support ring 1 is fixed on the inner wall of the lower part of the shell 6, a ring-shaped distribution pipe 4 is fixed on the top of the limited support ring 1, and the ring-shaped distribution pipe 4 is fixed on the top of the limited support ring 1. Smoke outlet holes 21 are evenly arranged on the inner wall of the tube 4, the annular distribution pipe 4 is fixedly connected to the smoke inlet pipe 22, the smoke outlet pipe 7 is connected to the spray cooling tower 10, and the bottom and top of the spray cooling tower 10 are respectively provided with a liquid outlet pipe and an air outlet pipe, and a vortex-shaped air distribution pipe 9 is fixed to the right end of the smoke outlet pipe 7, and air outlet holes 16 are evenly arranged at the bottom of the air distribution pipe 9, a packing layer 11 is provided above the air distribution pipe 9, and a vortex-shaped spray pipe 13 is provided above the packing layer 11, and nozzles 12 are evenly arranged at the bottom of the spray pipe 13, and the spray pipe 13 is connected to the liquid inlet pipe 14.

[0019] During operation, the waste flue gas enters the annular distribution pipe 4 from the flue gas inlet pipe 22, and then is evenly ejected from the smoke outlet 21. The ejected flue gas will avoid the outer heat exchange tube and spray to the middle, which can better distribute the flue gas. The flue gas is then contacted with the heat exchange tube 5 for heat exchange. The flue gas after heat exchange is discharged from the flue gas outlet pipe 7. The cold water entering from the cold water inlet pipe 2 will enter the heat exchange tube 5 to exchange heat with the flue gas. The cold water after heat exchange enters the reboiler 8 from the cold water outlet pipe 15 to generate usable steam. The flue gas coming out of the flue gas outlet pipe 7 enters the air distribution pipe 9, and then is evenly ejected from the air outlet 16. In the process of the flue gas rising, it will be sprayed and cooled by the liquid sprayed from the nozzle 12 on the spray pipe 13, and absorb harmful substances dissolved in water in the flue gas. Then the flue gas is discharged from the air outlet pipe.

[0020] Embodiment 2, on the basis of embodiment 1, a positioning boss 20 is provided on the top of the limiting support ring 1, and a positioning blind hole cooperating with the positioning boss 20 is provided on the bottom of the annular distribution pipe 4.

[0021] When installing the annular distribution pipe 4 , the positioning boss 20 can be inserted into the positioning blind hole to quickly locate the position of the smoke outlet 21 so that the smoke outlet 21 avoids the outer heat exchange tube 5 .

[0022] The left end of the smoke inlet pipe 22 is connected to the smoke delivery pipe 19, and a connecting flange is provided on the outer side of the right end of the smoke delivery pipe 19. A plurality of openings 17 are evenly arranged on the outer wall of the connecting flange, and a locking bolt 18 is provided in the opening 17. A fixing seat is hinged at the right end of the locking bolt 18, and a locking ring 24 is fixed on the inner side of the fixing seat. The locking ring 24 is sleeved on the smoke inlet pipe 22, and a limiting boss for limiting the locking ring 24 is provided on the outer side of the left end of the smoke inlet pipe 22. A supporting groove is provided on the inner side of the left end of the smoke inlet pipe 22, and a filter screen 25 is provided in the supporting groove. A pressing boss for pressing the outer side of the filter screen 25 is provided on the inner side of the right end of the smoke delivery pipe 19.

[0023] The filter screen 25 is arc-shaped, and a debris collecting groove is provided in the middle of the filter screen 25 .

[0024] A sealing ring is provided on the contact surface between the smoke conveying pipe 19 and the smoke inlet pipe 22 , and a bellows 23 is provided on one end of the smoke inlet pipe 22 .

[0025] When it is necessary to clean the filter 25, the nut on the locking bolt 18 can be loosened, and then the locking bolt 18 can be rotated clockwise to disengage the locking bolt 18 from the opening 17, and then the smoke inlet pipe 22 can be pressed to the right to shrink the bellows 23, so that the filter 25 can be quickly and conveniently taken out for cleaning. After cleaning, the filter 25 can be placed back in the supporting groove, and then the left end of the smoke inlet pipe 22 can be docked with the right end of the smoke delivery pipe 19 so that the clamping boss can clamp the filter 25, and then the locking ring 24 can be rotated to make the locking bolt 18 correspond to the position of the opening 17, and then the locking bolt 18 can be rotated counterclockwise to make the locking bolt 18 enter the opening 17, and then the nut on the locking bolt 18 can be tightened to complete the fixation.

[0026] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

[0027] In the description of the present invention, the terms "inside", "outside", "longitudinal", "lateral", "upper", "lower", "top", "bottom" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and do not require that the present invention must be constructed and operated in a specific orientation. Therefore, they should not be understood as limitations on the present invention.

Claims

1. A waste heat recovery device for ceramic production, comprising a heat exchanger, the heat exchanger comprising a shell (6), support orifice plates (3) are fixed on the upper and lower parts of the shell (6), a plurality of heat exchange tubes (5) are fixed between the upper and lower support orifice plates (3), a cold water outlet pipe (15) is provided on the top of the shell (6), a cold water inlet pipe (2) is provided on the bottom of the shell (6), and a smoke inlet pipe (22) and a smoke outlet pipe (7) are connected to the upper and lower parts of the shell (6), respectively, characterized in that: The cold water outlet pipe (15) is connected to the reboiler (8). A limit support ring (1) is fixed on the inner wall of the lower part of the shell (6). An annular distribution pipe (4) is fixed on the top of the limit support ring (1). Smoke outlet holes (21) are evenly arranged on the inner wall of the annular distribution pipe (4). The annular distribution pipe (4) is fixedly connected to the smoke inlet pipe (22). The smoke outlet pipe (7) is connected to the spray cooling tower (10). The bottom and top of the spray cooling tower (10) are respectively provided with a liquid outlet pipe and an air outlet pipe. A vortex-shaped air distribution pipe (9) is fixed to the right end of the smoke outlet pipe (7). The bottom of the air distribution pipe (9) is evenly provided with air outlet holes (16). A packing layer (11) is provided above the air distribution pipe (9). A vortex-shaped spray pipe (13) is provided above the packing layer (11). Spray heads (12) are evenly arranged at the bottom of the spray pipe (13). The spray pipe (13) is connected to the liquid inlet pipe (14).

2. The ceramic production waste heat recovery device according to claim 1 is characterized in that: A positioning boss (20) is provided at the top of the position-limiting support ring (1), and a positioning blind hole cooperating with the positioning boss (20) is provided at the bottom of the annular distribution pipe (4).

3. The ceramic production waste heat recovery device according to claim 2 is characterized in that: The left end of the smoke inlet pipe (22) is connected to a smoke delivery pipe (19), a connecting flange is provided on the outer side of the right end of the smoke delivery pipe (19), a plurality of openings (17) are evenly provided on the outer side wall of the connecting flange, a locking bolt (18) is provided in the opening (17), a fixing seat is hinged on the right end of the locking bolt (18), a locking ring (24) is fixed on the inner side of the fixing seat, the locking ring (24) is sleeved on the smoke inlet pipe (22), a limiting boss of the limiting locking ring (24) is provided on the outer side of the left end of the smoke inlet pipe (22), a supporting groove is provided on the inner side of the left end of the smoke inlet pipe (22), a filter screen (25) is provided in the supporting groove, and a pressing boss for pressing the outer side of the filter screen (25) is provided on the inner side of the right end of the smoke delivery pipe (19).

4. The ceramic production waste heat recovery device according to claim 1 is characterized in that: The filter screen (25) is in an arc shape, and a collecting groove is arranged in the middle of the filter screen (25).

5. The ceramic production waste heat recovery device according to claim 4 is characterized in that: A sealing ring is provided on the contact surface between the smoke conveying pipe (19) and the smoke inlet pipe (22), and a corrugated pipe (23) is provided at one end on the smoke inlet pipe (22).

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