Parallel water-cooling fire grate structure for waste incineration

Abstract

The utility model relates to a parallel water-cooled grate structure for waste incineration, which comprises a combustion furnace body, a plurality of mounting holes are arranged on one side of the combustion furnace body, grate pipes are sleeved in the mounting holes, a water inlet header pipe and a water outlet header pipe are respectively arranged on two sides of the combustion furnace body, and the water inlet header pipe and the water outlet header pipe are communicated with the mounting holes. Connecting pipes connected with the fire grate pipe are arranged on the outer wall of the water inlet header pipe and the outer wall of the water outlet header pipe. The utility model relates to the technical field of fire grates. According to the parallel water-cooled fire grate structure for waste incineration, the fire grate pipes are separated from the water inlet header pipe and the water outlet header pipe, so that when the fire grate pipes are blocked due to accumulation of scale, the blocked fire grate pipes can be independently replaced, the fire grate pipes can freely use common water as cooling liquid, and the use cost is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of grates, in particular to a parallel water-cooled grate structure for garbage incineration. Background Art

[0002] The component in a boiler or industrial furnace that piles solid fuel and makes it burn effectively. The entire grate mainly consists of two parts: the frame and the grate plate. The grate plate is usually made of cast iron. After assembly, the necessary ventilation gaps are maintained between the plates, and a separate ventilation chamber with adjustable air volume is often set under the grate so that air can enter the fuel layer through the gap for combustion.

[0003] In the prior art, since the cost of using pure water or soft water as the coolant in the water-cooled grate is too high, and using ordinary water as the coolant will form scale in the high-temperature pipeline and clog the grate, in order to reduce the cost of use, using ordinary water or recycled water and replacing the clogged pipeline separately is the best solution. Utility Model Content

[0004] In view of the deficiencies in the prior art, the purpose of the utility model is to provide a parallel water-cooled grate structure for waste incineration, so as to solve the technical problems mentioned in the above background technology.

[0005] The above technical objectives of the utility model are achieved through the following technical solutions:

[0006] A parallel water-cooled grate structure for waste incineration comprises a combustion furnace body, a plurality of mounting holes are provided on one side of the combustion furnace body, grate pipes are sleeved in the plurality of mounting holes, a water inlet main pipe and a water outlet main pipe are respectively provided on both sides of the combustion furnace body, and connecting pipes connected to the grate pipes are provided on the outer walls of the water inlet main pipe and the water outlet main pipe.

[0007] By adopting the above technical solution, by setting up multiple grate tubes, each grate tube can be replaced separately, avoiding the need to replace the entire water-cooled grate after the grate tube is blocked by scale, thereby reducing the use cost of the water-cooled grate.

[0008] In a preferred example, the utility model can be further configured as follows: the outer wall of the connecting pipe is provided with a threaded sleeve for threaded connection to the grate pipe, the outer wall protrusion of the connecting pipe is formed with a stopper for preventing the threaded sleeve from falling out, and a sealing ring is provided between the grate pipe and the connecting pipe.

[0009] By adopting the above technical solution, the threaded sleeve can facilitate the connection between the water inlet main pipe, the water outlet main pipe and the grate pipe, thereby improving the installation and maintenance efficiency of the water-cooled grate.

[0010] In a preferred example, the utility model can be further configured as follows: the openings of the mounting holes close to the outside of the combustion furnace body are fixedly connected with main flanges, the outer wall of the grate pipe is sleeved with secondary flanges connected to the main flanges, and a packing gland is arranged between the main flanges and the secondary flanges.

[0011] By adopting the above technical solution, the main flange and the auxiliary flange can be used to fix the grate pipe, and the packing gland can further increase the connectivity between the two flanges and improve the sealing of the furnace body.

[0012] In a preferred example, the utility model can be further configured as follows: the outer walls of the water inlet main pipe and the water outlet main pipe are both provided with thermal insulation protective sleeves, the thermal insulation protective sleeves are located on one side of the connecting pipe and extend forward to form an extension portion, and the extension portion is covered on the outside of the connecting pipe and the grate pipe.

[0013] By adopting the above technical solution, the provided thermal insulation protective cover can be used to protect the part of the water-cooled grate exposed on the outside of the combustion furnace body, thereby reducing heat loss and preventing people from being scalded.

[0014] In a preferred example, the utility model can be further configured as follows: one end of the grate pipe close to the water outlet main pipe is bent upward to form a bent portion, so that a height difference is formed between the water outlet main pipe and the water inlet main pipe.

[0015] By adopting the above technical solution, the principle that the density of hot water is less than that of cold water is utilized, so that the hot water is squeezed by the cold water and automatically flows upward, reducing the resistance of the water flow in the grate pipe, thereby increasing the water flow speed.

[0016] In a preferred example, the utility model can be further configured as follows: the area of ​​the combustion furnace body for installing the grate pipe is set to be square.

[0017] By adopting the above technical solution, the shape of the combustion furnace body and the grate in parallel can be made more compatible, thereby improving energy utilization efficiency.

[0018] In summary, the present invention includes at least one of the following beneficial technical effects:

[0019] 1. The parallel water-cooled grate structure for garbage incineration separates the grate pipe from the water inlet main pipe and the water outlet main pipe, so that when the grate pipe is blocked due to the accumulation of scale, the blocked grate pipe can be replaced separately, so that the grate pipe can freely use ordinary water as a coolant, thereby reducing the use cost;

[0020] 2. The parallel water-cooled grate structure for garbage incineration can be used to protect the part of the water-cooled grate exposed outside the combustion furnace body through the provided thermal insulation protective cover, thereby reducing heat loss and preventing people from being scalded. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0022] Figure 1 The utility model is a structural schematic diagram of a parallel water-cooled grate structure for garbage incineration.

[0023] Figure 2 The utility model is a schematic diagram of the internal structure of a parallel water-cooled grate structure for garbage incineration.

[0024] Figure 3 for Figure 2 Enlarged view of point A in the middle.

[0025] Figure 4 The utility model is a schematic structural diagram of a thermal insulation protective cover in a parallel water-cooled grate structure for garbage incineration.

[0026] In the figure, 1, combustion furnace body; 2, mounting hole; 3, grate pipe; 4, water inlet main pipe; 5, water outlet main pipe; 6, connecting pipe; 7, threaded sleeve; 8, block piece; 9, sealing ring; 10, main flange; 11, secondary flange; 12, packing gland; 13, thermal insulation protective cover; 14, extension part; 15, bending part. DETAILED DESCRIPTION

[0027] The utility model is further described in detail below in conjunction with the accompanying drawings.

[0028] Example:

[0029] Reference Figure 1 - Figure 4 The utility model discloses a parallel water-cooled grate structure for garbage incineration, comprising a combustion furnace body 1, a plurality of mounting holes 2 are opened on one side of the combustion furnace body 1, a grate pipe 3 is sleeved in each of the plurality of mounting holes 2, a water inlet main pipe 4 and a water outlet main pipe 5 are respectively arranged on both sides of the combustion furnace body 1, and the outer walls of the water inlet main pipe 4 and the water outlet main pipe 5 are both provided with connecting pipes 6 connected to the grate pipe 3.

[0030] In this embodiment, the grate pipe 3 is inserted into the mounting hole 2 of the combustion furnace body 1, and then the secondary flange 11 and the packing pressure cover 12 are put on the portion of the grate pipe 3 exposed on the outside of the combustion furnace body 1, and then the secondary flange 11 is connected to the main flange 10 to fix the grate pipe 3, and then the connecting pipe 6 of the water outlet main pipe 5 and the water inlet main pipe 4 is aligned with the two ends of the grate pipe 3, and is threadedly connected to the grate pipe 3 through the threaded sleeve 7, and the installation of the water-cooled grate is completed, and then the thermal insulation protective cover 13 is put on the portion of the water-cooled grate located outside the combustion furnace body 1 to protect the portion of the water-cooled grate exposed on the outside of the combustion furnace body, thereby reducing heat loss and preventing people from being scalded.

[0031] When the water-cooled grate produces scale and clogs the grate pipe 3 due to long-term use, first drain the water in the water-cooled grate, then disassemble the thermal insulation protection sleeve 13, and then reversely rotate the threaded sleeve 7 to separate the water inlet main pipe 4 and the water outlet main pipe 5 from the grate pipe 3, and finally disassemble the secondary flange 11 and the main flange 10 to pull out the old grate pipe 3 and replace it with a new grate pipe 3 to complete the maintenance of the water-cooled grate.

[0032] In a further preferred embodiment of the present invention, Figure 4 As shown, the outer wall of the connecting pipe 6 is provided with a threaded sleeve 7 for threaded connection to the grate pipe 3, the outer wall of the connecting pipe 6 is protruded to form a stopper 8 for preventing the threaded sleeve 7 from falling out, and a sealing ring 9 is provided between the grate pipe 3 and the connecting pipe 6.

[0033] In this embodiment, in order to reduce costs, the water-cooled grate uses ordinary water as the coolant, which will cause scale to accumulate in the grate pipe 3 and cause blockage. Therefore, the grate pipe 3, as a consumable, needs to have the function of being flexibly disassembled and assembled. Therefore, a threaded sleeve 7 is provided. The threaded connection of the threaded sleeve 7 can quickly connect the grate pipe 3 and the connecting pipe 6, thereby improving the installation and maintenance efficiency of the water-cooled grate.

[0034] Since the grate pipe 3 and the connecting pipe 6 can be flexibly disassembled and assembled, a gap will be generated, which may cause the coolant to leak. Therefore, a sealing ring 9 is provided between the grate pipe 3 and the connecting pipe 6 to increase the sealing performance to avoid the coolant leakage.

[0035] In a further preferred embodiment of the present invention, Figure 3 As shown, the main flange 10 is fixedly connected to the opening of the mounting hole 2 near the outer side of the combustion furnace body 1, the outer wall of the grate pipe 3 is provided with a secondary flange 11 connected to the main flange 10, and a packing gland 12 is arranged between the main flange 10 and the secondary flange 11.

[0036] In this embodiment, a mounting hole 2 for installing the grate pipe 3 is opened on the combustion furnace body 1 so that the grate pipe 3 can be freely replaced. The setting of the mounting hole 2 also leads to poor connection stability between the grate pipe 3 and the combustion furnace body 1, which causes the water-cooled grate to shake after installation, thereby causing the outer part of the grate pipe 3 to be damaged by friction. Therefore, a main flange 10 is provided on the mounting hole 2. After the grate pipe 3 passes through the main flange 10, the secondary flange 11 is put on the grate pipe 3, and then a packing cover 12 is provided between the main flange 10 and the secondary flange 11. The packing cover 12 is deformed and squeezed by the extrusion of the main flange 10 and the secondary flange 11 to fix the grate pipe 3, thereby improving the stability of the water-cooled grate after installation.

[0037] At the same time, the arrangement of the packing gland 12 can increase the sealing performance of the combustion furnace body 1, so that the water-cooled grate can be used in a positive pressure furnace, thereby improving the application range of the water-cooled grate.

[0038] In a further preferred embodiment of the present invention, Figure 4 As shown, the outer walls of the water inlet main pipe 4 and the water outlet main pipe 5 are both provided with a thermal insulation protective sleeve 13, and the thermal insulation protective sleeve 13 is located on one side of the connecting pipe 6 and extends forward to form an extension portion 14, and the extension portion 14 is covered on the outside of the connecting pipe 6 and the grate pipe 3.

[0039] In the present embodiment, because heat will be transferred, even if the grate pipe 3 is not extended out of the combustion furnace body 1, as the coolant is heated in the combustion furnace body 1, the heated coolant will also heat up the water outlet main pipe 5, which will cause the risk of scalding and increase the loss of heat. The grate pipe 3 is separately arranged between the water inlet main pipe 4 and the water outlet main pipe 5. Therefore, in order to facilitate the connection between the grate pipe 3 and the water inlet main pipe 4 and the water outlet main pipe 5, it is necessary to extend both ends of the grate pipe 3 out of the combustion furnace body 1. This also leads to the temperature of the two ends of the grate pipe 3 extending out of the combustion furnace body 1 increasing due to the heat transfer when the combustion furnace body 1 is running, thereby accelerating the loss of heat. Therefore, a thermal insulation protective cover 13 and an extension portion 14 are provided to wrap the portion of the water-cooled grate located outside the combustion furnace body 1, so as to reduce heat loss and avoid scalding.

[0040] In a further preferred embodiment of the present invention, Figure 2 As shown, one end of the grate pipe 3 close to the water outlet main pipe 5 is bent upward to form a bent portion 15 , so that a height difference is formed between the water outlet main pipe 5 and the water inlet main pipe 4 .

[0041] In this embodiment, during the process of heating the coolant, the density of the coolant will gradually decrease. Therefore, the low-temperature coolant with a larger density will push the high-temperature coolant with a lower density to flow upward. Therefore, the end of the grate pipe 3 close to the water outlet main pipe 5 is bent upward to form a height difference between the water outlet main pipe 5 and the water inlet main pipe 4. This can reduce the flow resistance of the coolant in the grate pipe 3, thereby accelerating the flow rate of the liquid, avoiding overheating of the grate, and increasing the protection of the grate.

[0042] In a further preferred embodiment of the present invention, Figure 1 As shown, the area of ​​the combustion furnace body 1 for installing the grate pipe 3 is set to be square.

[0043] In the present embodiment, because a plurality of grate tubes 3 are arranged in parallel, the occupied area of ​​the water-cooled grate is larger, so the non-square combustion furnace body 1 cannot completely cover all the grate tubes 3, resulting in a lower heat utilization efficiency. When the combustion furnace body 1 is square, the combustion furnace body 1 and the parallel grate tubes 3 have the highest fit, so the energy utilization efficiency is higher.

[0044] The embodiments of this specific implementation method are all preferred embodiments of the utility model, and are not intended to limit the protection scope of the utility model. Therefore, all equivalent changes made based on the structure, shape, and principle of the utility model should be included in the protection scope of the utility model.

Claims

1. A parallel water-cooled grate structure for waste incineration, comprising a combustion furnace body (1), characterized in that: A plurality of mounting holes (2) are provided on one side of the combustion furnace body (1), and grate pipes (3) are sleeved in the plurality of mounting holes (2). A water inlet main pipe (4) and a water outlet main pipe (5) are provided on both sides of the combustion furnace body (1), and connecting pipes (6) connected to the grate pipes (3) are provided on the outer walls of the water inlet main pipe (4) and the water outlet main pipe (5).

2. A parallel water-cooled grate structure for waste incineration according to claim 1, characterized in that: The outer wall of the connecting pipe (6) is sleeved with a threaded sleeve (7) for threaded connection with the grate pipe (3); a stopper (8) is formed on the outer wall of the connecting pipe (6) to prevent the threaded sleeve (7) from falling out; and a sealing ring (9) is provided between the grate pipe (3) and the connecting pipe (6).

3. A parallel water-cooled grate structure for waste incineration according to claim 1, characterized in that: The installation holes (2) are fixedly connected to the openings near the outside of the combustion furnace body (1) with a main flange (10); the outer wall of the grate pipe (3) is sleeved with a secondary flange (11) connected to the main flange (10); and a packing gland (12) is provided between the main flange (10) and the secondary flange (11).

4. A parallel water-cooled grate structure for waste incineration according to claim 1, characterized in that: The outer walls of the water inlet main pipe (4) and the water outlet main pipe (5) are both provided with a thermal insulation protective sleeve (13), the thermal insulation protective sleeve (13) is located on one side of the connecting pipe (6) and extends forward to form an extension portion (14), and the extension portion (14) covers the outer sides of the connecting pipe (6) and the grate pipe (3).

5. The parallel water-cooled grate structure for waste incineration according to claim 1, characterized in that: One end of the grate pipe (3) close to the water outlet main pipe (5) is bent upward to form a bent portion (15), so that a height difference is formed between the water outlet main pipe (5) and the water inlet main pipe (4).

6. A parallel water-cooled grate structure for waste incineration according to claim 1, characterized in that: The area of ​​the combustion furnace body (1) used for installing the grate pipe (3) is arranged in a square shape.

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