Grate cooler with partitioned air supply and heat regeneration functions

Abstract

The utility model relates to the technical field of grate coolers, and discloses a grate cooler with partitioned air supply and heat regeneration functions. The grate cooler with the partitioned air supply and heat regeneration functions comprises a grate cooler body, three air extracting pumps are fixedly installed at the top of the grate cooler body, air outlet pipes are fixedly installed at the tops of the air extracting pumps, a temperature detector is fixedly installed in the middle of each air outlet pipe, and a heat preservation layer is fixedly installed in each air outlet pipe; an inner container is fixedly installed in the heat preservation layer. According to the grate cooler, the three stepping conveying belts are installed in a stepped mode, so that materials can be conveyed in a stepped mode, the temperature of the materials can be detected through the temperature detection plate on one side of the temperature detector, the grate cooler can be divided into three areas, hot air at the top can be extracted out through the air extraction cover through operation of the air extraction pump, and the heat exchange efficiency is improved. And the hot air can be sent out through the air outlet pipe, and the temperature of the air in the air outlet pipe can be detected through the temperature detector.

Description

Technical Field

[0001] This utility model relates to the field of grate cooler technology, specifically a grate cooler with zoned air supply and heat recovery. Background Technology

[0002] The grate cooler is a crucial main equipment in the clinker calcination system of a cement plant. Its primary functions are to cool and transport cement clinker, and to provide hot air for the rotary kiln and decomposition furnace. It is also a key piece of equipment for heat recovery in the calcination system. The clinker is piled up at the fixed end of the grate cooler. Cooling fans at the fixed end draw air from both sides of the air-filled beam at the fixed end, passing through the grate gaps and then into the piled clinker. During this process, the air exchanges heat with the high-temperature clinker exiting the rotary kiln, achieving the purpose of rapidly cooling the high-temperature clinker and heating the low-temperature air. The high-temperature air after heat exchange enters the rotary kiln, providing oxygen for the combustion of pulverized coal inside the kiln.

[0003] The existing Chinese utility model patent with announcement number CN214250587U discloses a zoned air supply system for a grate cooler fixed end, relating to the field of grate cooler technology. It includes a chamber fan, a left-side air-filled beam fan, and a right-side air-filled beam fan. A concrete base is fixed to one side of the right-side air-filled beam fan, and one side of the concrete base is connected to the ground. A new centerline air-filled beam fan is fixed to the top of the ground, and the outlet end of the new centerline air-filled beam fan is connected to a second air duct. This utility model, through modification, changes the material pile at the fixed end from a pile with an angle of approximately 50° to a gently sloping arc pile. The thickness of the material in the centerline area is reduced due to the cooling and fluidization effect. Replacing the fan with a new high-efficiency fan and increasing the pressure head increases the operating current and actual air supply. Snow is less likely to form at the fixed end, and the material is better fluidized at the fixed end and in the first section, resulting in better clinker cooling and a lower clinker temperature exiting the grate cooler. Under stable kiln conditions, the secondary and tertiary air temperatures can be steadily increased. The standard coal consumption for clinker decreases after the modification.

[0004] Although the aforementioned fixed-end zoned air supply system for a grate cooler has solved the problems of uneven air distribution and poor clinker cooling by changing the material pile at the fixed end from a pile with an angle of about 50° to a gently curved pile, the above-mentioned equipment is not convenient for zoned reheating. The temperature at the head of the grate cooler is too high and can be fully utilized, while the temperature at the tail of the grate cooler is too low after air supply and is not suitable for reheating. The existing mixed reheating will affect the performance. Utility Model Content

[0005] (a) Technical problems to be solved

[0006] To address the shortcomings of existing technologies, this utility model provides a grate cooler with zoned air supply and reheating, which has advantages such as effective reheating and easy zoned reheating, thus solving the aforementioned technical problems.

[0007] (II) Technical Solution

[0008] To achieve the above objectives, this utility model provides the following technical solution: a grate cooler with zoned air supply and reheating, comprising:

[0009] The main body of the grate cooler includes three air pumps fixedly installed on its top. Each air pump has an outlet pipe fixedly installed on its top, a temperature sensor fixedly installed in the middle of the outlet pipe, an insulation layer fixedly installed inside the outlet pipe, and an inner liner fixedly installed inside the insulation layer. An air extraction trough is fixedly installed at the bottom of each air pump, and an air extraction cover is fixedly installed at the bottom of the air extraction trough. A filter screen is fixedly installed inside the air extraction cover. A connecting pipe is movably connected to one side of the outlet pipe, an insulation pipe is fixedly installed inside the connecting pipe, and an inner tube is fixedly installed inside the insulation pipe. A heat exchanger is fixedly installed on one side of the connecting pipe, a conveying pipe is fixedly installed on one side of the heat exchanger, a temperature sensor is fixedly installed on the outside of the conveying pipe, and a filter is fixedly installed on one side of the conveying pipe.

[0010] As a preferred technical solution of this utility model, three stepping conveyor belts are fixedly installed inside the main body of the grate cooler, and the stepping conveyor belts can transport materials in segments.

[0011] As a preferred technical solution of this utility model, three temperature detection plates are fixedly installed on one side of the grate cooler body, and a temperature detector is fixedly installed on one side of the temperature detection plates. The temperature detector can detect the temperature inside the grate cooler body.

[0012] As a preferred embodiment of this utility model, a feed inlet is fixedly installed on the right side of the main body of the grate cooler, and a discharge outlet is fixedly installed on the left side of the main body of the grate cooler. The discharge outlet is a structure for discharging materials.

[0013] As a preferred technical solution of this utility model, air inlet pipes are fixedly installed on both sides of the bottom of the main body of the grate cooler, and a blower is fixedly installed on one side of the air inlet pipe. The blower is a structure used for air outlet.

[0014] As a preferred embodiment of this utility model, a base is fixedly installed at the bottom of the blower, and the base is a structure used to support the bottom.

[0015] Compared with the prior art, this utility model provides a grate cooler with zoned air supply and reheating, which has the following beneficial effects:

[0016] 1. This utility model uses three step conveyor belts installed in a stepped manner to transport materials in a stepped manner. The temperature of the material can be detected by a temperature detection plate on one side of the temperature detector, thus dividing the grate cooler into three zones. The operation of the air pump can extract the hot air from the top through the air extraction cover, filter it through the filter screen, and send the hot air out through the air outlet pipe. The temperature of the gas inside the air outlet pipe can be detected by the temperature detector, which improves the practicality of the grate cooler with air supply and heat recovery in this zone.

[0017] 2. This utility model can keep the hot air inside the inner tank warm through the insulation layer between the air outlet pipe and the inner tank, and can keep the temperature inside the inner tank warm through the insulation pipe between the connecting pipe and the inner pipe. The gas can be sent into the heat exchanger for heat exchange through the connection pipe and the air outlet pipe at the tail of the grate cooler body. After heat exchange, the gas is sent into the filter device for filtration and then discharged. This improves the practicality of the grate cooler with zoned air supply and heat recovery, so as to facilitate zoned heat recovery of the grate cooler body. Attached Figure Description

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

[0019] Figure 2 This is a schematic diagram of the main body of the grate cooler of this utility model;

[0020] Figure 3 This is a schematic diagram of the air pump of this utility model;

[0021] Figure 4 This is a schematic diagram of the connecting pipe of this utility model.

[0022] The components include: 1. Main body of the grate cooler; 11. Stepping conveyor belt; 12. Temperature detection plate; 13. Temperature detector; 14. Feed inlet; 15. Discharge outlet; 16. Air inlet pipe; 17. Blower; 18. Base; 2. Air pump; 21. Air outlet pipe; 22. Temperature detector; 23. Insulation layer; 24. Inner liner; 25. Air extraction groove; 26. Air extraction cover; 27. Filter screen; 3. Connecting pipe; 31. Insulation pipe; 32. Inner pipe; 33. Heat exchanger; 34. Conveying pipe; 35. Temperature detection device; 36. Filter device. Detailed Implementation

[0023] The embodiments of this utility model will be described in further detail below with reference to the accompanying drawings and examples. The following examples are for illustrative purposes only and should not be construed as limiting the scope of this utility model.

[0024] In the description of this utility model, unless otherwise stated, "a plurality of" means two or more; the terms "upper," "lower," "left," "right," "inner," "outer," "front end," "rear end," "head," "tail," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. In addition, the terms "first," "second," "third," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0025] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0026] Please see Figure 1 - Figure 4 In this embodiment, a grate cooler with zoned air supply and heat recovery includes: a grate cooler body 1, three stepping conveyor belts 11 fixedly installed inside the grate cooler body 1, three temperature detection plates 12 fixedly installed on one side of the grate cooler body 1, a temperature detector 13 fixedly installed on one side of the temperature detection plate 12, a feed inlet 14 fixedly installed on the right side of the grate cooler body 1, a discharge outlet 15 fixedly installed on the left side of the grate cooler body 1, air inlet pipes 16 fixedly installed on the bottom of both sides of the grate cooler body 1, a blower 17 fixedly installed on one side of the air inlet pipe 16, and a base 18 fixedly installed at the bottom of the blower 17.

[0027] Specifically, the base 18 can support the blower 17, and the operation of the blower 17 can send outside air into the interior of the grate cooler body 1 through the air inlet pipe 16. The temperature inside the grate cooler body 1 can be detected by the temperature detection plate 12 on one side of the temperature detector 13.

[0028] Three air pumps 2 are fixedly installed on the top of the main body 1 of the grate cooler. An air outlet pipe 21 is fixedly installed on the top of each air pump 2. A temperature detector 22 is fixedly installed in the middle of the air outlet pipe 21. An insulation layer 23 is fixedly installed inside the air outlet pipe 21, and an inner liner 24 is fixedly installed inside the insulation layer 23. An air extraction groove 25 is fixedly installed at the bottom of each air pump 2. An air extraction cover 26 is fixedly installed at the bottom of the air extraction groove 25, and a filter screen 27 is fixedly installed inside the air extraction cover 26.

[0029] Specifically, the operation of the air pump 2 can extract the hot air from the top of the grate cooler body 1 through the air extraction cover 26, filter the hot air through the filter screen 27 inside the air extraction cover 26, and send the hot air out through the air outlet pipe 21.

[0030] A connecting pipe 3 is movably connected to one side of the outlet pipe 21. An insulation pipe 31 is fixedly installed inside the connecting pipe 3. An inner pipe 32 is fixedly installed inside the insulation pipe 31. A heat exchanger 33 is fixedly installed on one side of the connecting pipe 3. A conveying pipe 34 is fixedly installed on one side of the heat exchanger 33. A temperature detection device 35 is fixedly installed on the outside of the conveying pipe 34. A filter device 36 is fixedly installed on one side of the conveying pipe 34.

[0031] Specifically, the outer side of the inner tube 32 can be insulated through the heat-insulating pipe 31 inside the connecting pipe 3, and the hot air can be exchanged through the heat exchanger 33. After heat exchange, the air is sent into the filter device 36 for filtration through the conveying pipe 34.

[0032] In use, the grate cooler with zoned air supply and heat recovery is first placed in the designated position. The base 18 supports the blower 17. The blower 17 draws outside air into the grate cooler body 1 through the air inlet duct 16, thus exchanging heat with the material. Three step conveyor belts 11 facilitate segmented material transport, allowing for zoned air supply and heat recovery. Material is fed through the inlet 14 and discharged through the outlet 15. The temperature inside the grate cooler body 1 is monitored by the temperature detection plate 12 on one side of the temperature detector 13, improving the practicality of the zoned air supply and heat recovery grate cooler. The air extraction pump 2 extracts hot air from the top of the grate cooler body 1 through the extraction cover 26. The filter screen 27 inside the exhaust cover 26 can filter hot air. The temperature detector 22 on the outside of the exhaust pipe 21 can detect the temperature of the hot air inside the exhaust pipe 21. The insulation layer 23 inside the exhaust pipe 21 can keep the hot air inside the inner liner 24 warm, avoiding heat loss and enabling zoned heat recovery. The end connecting pipe 3 is connected to the exhaust pipe 21, so hot air can be sent into the connecting pipe 3. The insulation pipe 31 inside the connecting pipe 3 can keep the hot air inside the inner pipe 32 warm. The heat exchanger 33 can exchange heat with the hot air. The gas after heat exchange is sent into the filter device 36 for filtration and discharge. The temperature detector 35 can detect the temperature inside the delivery pipe 34.

[0033] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A grate cooler with zoned air supply and heat recovery, characterized in that, The partitioned air supply heat recovery grate cooler, including the grate cooler main body (1), the top of the grate cooler main body (1) is fixedly installed with three air extraction pumps (2), the top of the air extraction pump (2) is fixedly installed with the air outlet pipe (21), the middle of the air outlet pipe (21) is fixedly installed with the temperature detector (22), the inside of the air outlet pipe (21) is fixedly installed with the heat preservation layer (23), the inside of the heat preservation layer (23) is fixedly installed with the inner container (24), the bottom of the air extraction pump (2) is fixedly installed with the air extraction groove (25), the bottom of the air extraction groove (25) is fixedly installed with the air extraction cover (26), the inside of the air extraction cover (26) is fixedly installed with the filter screen (27), one side of the air outlet pipe (21) is movably connected with the connecting pipe (3), the inside of the connecting pipe (3) is fixedly installed with the heat preservation pipe (31), the inside of the heat preservation pipe (31) is fixedly installed with the inner pipe (32), one side of the connecting pipe (3) is fixedly installed with the heat exchanger (33), one side of the heat exchanger (33) is fixedly installed with the conveying pipe (34), the outer side of the conveying pipe (34) is fixedly installed with the temperature detection device (35), one side of the conveying pipe (34) is fixedly installed with the filtering device (36).

2. A grate cooler with zoned air supply and heat recovery according to claim 1, characterized in that: The inside of the grate cooler main body (1) is fixedly installed with three step transmission belts (11).

3. A grate cooler with zoned air supply and heat recovery according to claim 2, characterized in that: One side of the grate cooler main body (1) is fixedly installed with three temperature detection plates (12), one side of the temperature detection plate (12) is fixedly installed with the temperature detector (13).

4. A grate cooler with zoned air supply and heat recovery according to claim 3, characterized in that: The right side of the grate cooler main body (1) is fixedly installed with the feeding port (14), and the left side of the grate cooler main body (1) is fixedly installed with the discharging port (15).

5. A grate cooler with zoned air supply and heat recovery according to claim 4, characterized in that: Both sides of the bottom of the grate cooler main body (1) are fixedly installed with the air inlet pipe (16), one side of the air inlet pipe (16) is fixedly installed with the air blower (17).

6. A grate cooler with zoned air supply and heat recovery according to claim 5, characterized in that: The bottom of the air blower (17) is fixedly installed with the base (18).

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