Waste heat recovery device of grate cooler

Abstract

The utility model discloses a waste heat recovery device of a grate cooler, which relates to the technical field of waste heat recovery of grate coolers and comprises a waste heat drying device, a bottom plate is fixedly mounted at the bottom of the waste heat drying device, and an air inlet box is fixedly mounted on one side of the top of the waste heat drying device. And a temperature detector is fixedly installed on the other side of the top of the waste heat drying device, a control valve is fixedly installed on the top of the temperature detector, and a circulating pipe is fixedly installed on the top of the control valve. According to the waste heat recovery device of the grate cooler, flue gas is conveyed into the gas inlet box through the gas outlet pipe, heat preservation treatment can be conducted on the outer side of the gas outlet pipe through the heat preservation layer, heat insulation treatment can be conducted on the outside through the heat insulation layer on the outer side of the heat preservation layer, and therefore the temperature loss of the flue gas in the gas outlet pipe can be avoided; meanwhile, the circulating pipe, the connecting pipe, the conveying pipe and the smoke outlet pipe are subjected to thermal insulation treatment by adopting the structure.

Description

Technical Field

[0001] The utility model relates to the technical field of waste heat recovery of grate coolers, in particular to a waste heat recovery device for a grate cooler. Background Art

[0002] Grate cooler is an important main equipment in the clinker burning system of cement plant. Its main function is to cool and transport cement clinker, and provide hot air for rotary kiln and decomposition furnace, etc. It is the main equipment for heat recovery in the burning system.

[0003] The existing Chinese utility model patent with reference announcement number CN219869175U discloses a waste heat recovery system for a grate cooler, which is convenient for filtering and intercepting dust in hot gas, is not easy to cause pipe blockage, is not easy to produce harmful gas, and is convenient for cleaning dust. The system comprises a grate cooler body, a waste heat recovery pipe, a filter screen, a protruding pipe, a cleaning plate and a collecting mechanism. The waste heat recovery pipe is connected to the grate cooler body, the filter screen is fixedly connected to the waste heat recovery pipe, and is used to intercept dust in hot gas. The protruding pipe is connected to the waste heat recovery pipe, and a receiving plate for receiving dust is slidably connected to the protruding pipe through a sliding mechanism. A cleaning port for cleaning out dust is provided on the protruding pipe, a sealing plate is hinged at the cleaning port, a limiting mechanism is arranged between the sealing plate and the protruding pipe, the cleaning plate is connected to the receiving plate through a telescopic mechanism, and the collecting mechanism is arranged on the receiving plate.

[0004] Although the above-mentioned grate cooler waste heat recovery system intercepts dust in hot gas through a filter net and solves the problem of hot gas being mixed with a lot of dust that easily clogs the pipeline in the prior art, the existing grate cooler waste heat recovery effect is not good, which easily causes waste of energy, thereby affecting the efficiency of waste heat recovery. Utility Model Content

[0005] The utility model aims to overcome the problem of poor waste heat recovery effect in the prior art and provides a waste heat recovery device for a grate cooler.

[0006] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0007] A grate cooler waste heat recovery device, comprising:

[0008] A waste heat drying device, wherein a base plate is fixedly installed at the bottom of the waste heat drying device, an air intake box is fixedly installed at one side of the top of the waste heat drying device, a temperature detector is fixedly installed at the other side of the top of the waste heat drying device, a control valve is fixedly installed at the top of the temperature detector, a circulation pipe is fixedly installed at the top of the control valve, a vacuum pump is fixedly installed at one side of the circulation pipe, an air outlet pipe is fixedly installed at one side of the air intake box, a thermal insulation layer is fixedly installed at the outside of the air outlet pipe, a thermal insulation layer is fixedly installed at the outside of the thermal insulation layer, an air outlet is fixedly installed at the bottom of the air outlet pipe, a grate cooler body is fixedly installed at the bottom of the air outlet, and a feed port is fixedly installed at the top of one side of the grate cooler body.

[0009] In a preferred embodiment, a connecting pipe is fixedly installed on one side of the control valve, and a waste heat power generation device is fixedly installed on one side of the connecting pipe. The waste heat power generation device is a structure for recovering waste heat to generate electricity.

[0010] In a preferred embodiment, a delivery pipe is fixedly installed on one side of the top of the waste heat power generation device, and a heat exchanger is fixedly installed on one side of the delivery pipe. The heat exchanger is a structure for heating water by exchanging waste heat.

[0011] In a preferred embodiment, a water tank is fixedly installed on one side of the heat exchanger, and a support frame is fixedly installed on the bottom of the water tank, and the support frame is a structure for supporting.

[0012] In a preferred embodiment, a smoke outlet pipe is fixedly mounted on one side of the heat exchanger, and a temperature detector is fixedly mounted on the outer side of the smoke outlet pipe. The temperature detector is a structure for performing temperature detection.

[0013] In a preferred embodiment, a connecting valve is fixedly installed on one side of the smoke outlet pipe, and a heat exchange device is fixedly installed on one side of the connecting valve. The heat exchange device is a structure for performing heat exchange.

[0014] In a preferred embodiment, a merging pipe is fixedly installed on one side of the heat exchange device, and a filtering device is fixedly installed on one side of the merging pipe, and the filtering device is a structure for filtering.

[0015] Compared with the prior art, the beneficial effects of the utility model are:

[0016] 1. The waste heat recovery device of the grate cooler conveys the flue gas to the inside of the air inlet box through the outlet pipe, and the outside of the outlet pipe can be insulated by the insulation layer, and the outside can be insulated by the insulation layer outside the insulation layer, so as to avoid the loss of flue gas temperature inside the outlet pipe, thereby improving the waste heat recovery effect of the waste heat recovery device of the grate cooler. At the same time, the circulation pipe, the connecting pipe, the conveying pipe and the smoke outlet pipe are all insulated and heat-preserved by the structure, thereby improving the practicality of the waste heat recovery device of the grate cooler;

[0017] 2. The waste heat recovery device of the grate cooler recovers waste heat through a waste heat drying device, and then detects the temperature through a temperature detector. When the temperature is high, the flue gas is sent into the exhaust box through a circulation pipe and the flue gas inside the exhaust pipe is mixed and sent to the waste heat drying device for drying. The waste heat is recovered twice through a waste heat power generation device, and the waste heat is recovered three times through a heat exchanger. The temperature is detected by a temperature detector. When the temperature is high, the flue gas is sent into the heat exchange device for four times of waste heat recovery, and finally sent from the merging pipe to the filter device for filtration and discharge, thereby improving the recovery efficiency of the waste heat recovery device of the grate cooler. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0019] Figure 2 It is a schematic diagram of the waste heat drying device in the utility model;

[0020] Figure 3 This is a schematic diagram of the main body of the grate cooler in the utility model;

[0021] Figure 4 It is a schematic diagram of the waste heat power generation device in the utility model;

[0022] Figure 5 It is a schematic diagram of the heat exchange device in the utility model.

[0023] 1. Waste heat drying device; 11. Bottom plate; 12. Air inlet box; 13. Temperature detector; 14. Control valve; 15. Circulation pipe; 16. Vacuum pump; 2. Exhaust pipe; 21. Insulation layer; 22. Insulation layer; 23. Air outlet; 24. Grate cooler body; 25. Feed inlet; 3. Connecting pipe; 31. Waste heat power generation device; 32. Delivery pipe; 33. Heat exchanger; 34. Water tank; 35. Support frame; 4. Smoke outlet pipe; 41. Temperature detector; 42. Connecting valve; 43. Heat exchange device; 44. Merging pipe; 45. Filter device. DETAILED DESCRIPTION

[0024] 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.

[0025] Combined with Figure 1-Figure 5 In this embodiment, a waste heat recovery device for a grate cooler includes: a waste heat drying device 1, a bottom plate 11 is fixedly installed at the bottom of the waste heat drying device 1, an air intake box 12 is fixedly installed on one side of the top of the waste heat drying device 1, a temperature detector 13 is fixedly installed on the other side of the top of the waste heat drying device 1, a control valve 14 is fixedly installed on the top of the temperature detector 13, a circulation pipe 15 is fixedly installed on the top of the control valve 14, and an air extraction pump 16 is fixedly installed on one side of the circulation pipe 15.

[0026] Specifically, waste heat can be recovered and utilized through the waste heat drying device 1, and the temperature of the air outlet is detected by the temperature detector 13. When the temperature is high enough for secondary utilization, the flue gas is sent back to the air intake box 12 from the circulation pipe 15 through the control valve 14, and the exhaust pump 16 can assist the flue gas circulation.

[0027] An air outlet pipe 2 is fixedly installed on one side of the air inlet box 12, a heat-insulating layer 21 is fixedly installed on the outer side of the air outlet pipe 2, a heat-insulating layer 22 is fixedly installed on the outer side of the heat-insulating layer 21, an air outlet 23 is fixedly installed on the bottom of the air outlet pipe 2, a grate cooler body 24 is fixedly installed on the bottom of the air outlet 23, and a feed port 25 is fixedly installed on the upper side of the grate cooler body 24.

[0028] Specifically, the hot air discharged from the grate cooler body 24 is transported through the air outlet pipe 2 , the outer side of the air outlet pipe 2 can be insulated through the thermal insulation layer 21 , and the thermal insulation layer 22 can be used for thermal insulation.

[0029] A connecting pipe 3 is fixedly installed on one side of the control valve 14 , and a waste heat power generation device 31 is fixedly installed on one side of the connecting pipe 3 .

[0030] A delivery pipe 32 is fixedly installed on one side of the top of the waste heat power generation device 31 , and a heat exchanger 33 is fixedly installed on one side of the delivery pipe 32 .

[0031] A water tank 34 is fixedly mounted on one side of the heat exchanger 33 , and a support frame 35 is fixedly mounted on the bottom of the water tank 34 .

[0032] Specifically, the flue gas is sent into the waste heat power generation device 31 through the connecting pipe 3 to generate electricity, and secondary heat exchange is performed through the heat exchanger 33, so that the water inside the water tank 34 is heated by the temperature of the flue gas, thereby improving the practicality of the grate cooler waste heat recovery device.

[0033] A smoke outlet pipe 4 is fixedly mounted on one side of the heat exchanger 33 , and a temperature detector 41 is fixedly mounted on the outer side of the smoke outlet pipe 4 .

[0034] A connecting valve 42 is fixedly installed on one side of the smoke outlet pipe 4 , and a heat exchange device 43 is fixedly installed on one side of the connecting valve 42 .

[0035] A merging pipe 44 is fixedly installed on one side of the heat exchange device 43 , and a filtering device 45 is fixedly installed on one side of the merging pipe 44 .

[0036] Specifically, smoke is discharged through the smoke outlet pipe 4, and the temperature is detected by the temperature detector 41. When the temperature is high, the smoke can be sent to the inside of the heat exchange device 43 through the connecting valve 42 for re-heat exchange, and sent out through the merging pipe 44. When the temperature is low, the smoke and the merging pipe 44 are merged through the connecting valve 42 and sent to the inside of the filtering device 45 for filtration.

[0037] Working principle: First, the high-temperature flue gas can be sent into the interior of the outlet pipe 2 through the air outlet 23 on one side of the top of the grate cooler body 24, and the high-temperature flue gas inside the outlet pipe 2 can be insulated through the insulation layer 21 on the outside of the outlet pipe 2, and the outside can be insulated through the insulation layer 22 on the outside of the insulation layer 21, thereby improving the insulation effect of the grate cooler waste heat recovery device, so as to insulate the high-temperature flue gas and improve the waste heat recovery efficiency. At the same time, the circulation pipe 15, the connecting pipe 3, the conveying pipe 32 and the smoke outlet pipe 4 are all insulated by this structure, thereby improving the practicality of the grate cooler waste heat recovery device, and the flue gas is sent into the interior of the air inlet box 12 through the outlet pipe 2, thereby sending the flue gas into the interior of the waste heat drying device 1 for waste heat recovery, and the exhaust temperature can be detected by the temperature detector 13. When the temperature is high, the flue gas is sent from the inside of the circulation pipe 15 to the inlet through the control valve 14. The interior of the air box 12 is circulated and reused, and the flue gas in the circulation pipe 15 can be sucked in by the exhaust pump 16. When the temperature detector 13 detects that the temperature is low, the flue gas is sent from the inside of the connecting pipe 3 to the inside of the waste heat power generation device 31 through the control valve 14 for secondary waste heat recovery, and the recovered flue gas is sent to the inside of the heat exchanger 33 through the delivery pipe 32 for heat exchange, thereby performing tertiary waste heat recovery, thereby heating the water in the water tank 34, and sending the flue gas out through the smoke outlet pipe 4. The flue gas temperature can be detected by the temperature detector 41. When the flue gas temperature is high, the flue gas is sent to the inside of the heat exchange device 43 through the connecting valve 42 for quadruple waste heat recovery. When the temperature is low, the flue gas is discharged through the connecting valve 42 and mixed from the merging pipe 44 and sent to the inside of the filtering device 45 for filtration, thereby improving the waste heat recovery effect and practicality of the grate cooler waste heat recovery device.

[0038] Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art may still modify the technical solutions described in the aforementioned embodiments, or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention shall be included in the protection scope of the present invention.

Claims

1. A grate cooler waste heat recovery device, characterized in that: include: A waste heat drying device (1), wherein a bottom plate (11) is fixedly mounted on the bottom of the waste heat drying device (1), an air intake box (12) is fixedly mounted on one side of the top of the waste heat drying device (1), a temperature detector (13) is fixedly mounted on the other side of the top of the waste heat drying device (1), a control valve (14) is fixedly mounted on the top of the temperature detector (13), a circulation pipe (15) is fixedly mounted on the top of the control valve (14), and one side of the circulation pipe (15) is fixedly mounted An air pump (16) is installed, an air outlet pipe (2) is fixedly installed on one side of the air inlet box (12), a heat preservation layer (21) is fixedly installed on the outer side of the air outlet pipe (2), a heat insulation layer (22) is fixedly installed on the outer side of the heat preservation layer (21), an air outlet (23) is fixedly installed at the bottom of the air outlet pipe (2), a grate cooler body (24) is fixedly installed at the bottom of the air outlet (23), and a feed port (25) is fixedly installed on the upper side of one side of the grate cooler body (24).

2. The grate cooler waste heat recovery device according to claim 1, characterized in that: A connecting pipe (3) is fixedly mounted on one side of the control valve (14), and a waste heat power generation device (31) is fixedly mounted on one side of the connecting pipe (3).

3. The grate cooler waste heat recovery device according to claim 2, characterized in that: A delivery pipe (32) is fixedly mounted on one side of the top of the waste heat power generation device (31), and a heat exchanger (33) is fixedly mounted on one side of the delivery pipe (32).

4. The grate cooler waste heat recovery device according to claim 3, characterized in that: A water tank (34) is fixedly mounted on one side of the heat exchanger (33), and a support frame (35) is fixedly mounted on the bottom of the water tank (34).

5. The grate cooler waste heat recovery device according to claim 3, characterized in that: A smoke outlet pipe (4) is fixedly mounted on one side of the heat exchanger (33), and a temperature detector (41) is fixedly mounted on the outside of the smoke outlet pipe (4).

6. The grate cooler waste heat recovery device according to claim 5, characterized in that: A connecting valve (42) is fixedly mounted on one side of the smoke outlet pipe (4), and a heat exchange device (43) is fixedly mounted on one side of the connecting valve (42).

7. The grate cooler waste heat recovery device according to claim 6, characterized in that: A merging pipe (44) is fixedly mounted on one side of the heat exchange device (43), and a filtering device (45) is fixedly mounted on one side of the merging pipe (44).

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