Fire grate segment for high-calorific-value household garbage incinerator

Abstract

The utility model relates to a fire grate segment for a high calorific value household garbage incinerator, which relates to the technical field of garbage incineration, and comprises a fire grate segment body, one end of the fire grate segment body is bent downwards, the other end of the fire grate segment body extends horizontally, side baffles are fixedly arranged on two sides of the fire grate segment body, a flow guide assembly is arranged between the side baffles, and the flow guide assembly is connected with the fire grate segment body. The flow guide assembly is used for enabling cooling air to flow along the fire grate segment body, a water cooling pipe is fixedly arranged in the fire grate segment body, and the water cooling pipe is used for enabling cooling water to flow along the fire grate segment body. The device has the effects that the fire grate segments are cooled conveniently, and the service life of the fire grate segments is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of garbage incineration, in particular to a grate plate for a high calorific value domestic garbage incinerator. Background Art

[0002] The grate slice is the core component of the grate-type incinerator. Its quality determines the performance of the entire grate. The working environment of the grate slice is very harsh, usually working in a high-temperature, corrosive and wear-prone environment. Therefore, the material selection, structural design and heat dissipation design of the grate slice determine the service life of the grate slice in harsh environment, determine the frequency of grate slice replacement, and thus determine the operating cost and economic benefits of the municipal solid waste incineration power plant.

[0003] With the continuous improvement of garbage classification, the continuous improvement of the calorific value of domestic garbage, and the increasing demand for the co-incineration of high-calorific-value industrial garbage, the temperature of the incineration grate has also increased. The existing grate plate structure has poor air cooling effect under high temperature, resulting in the temperature of the grate plate being too high, and its mechanical properties such as hardness and strength have dropped sharply, wear and corrosion have intensified, and service life has been shortened. The existing grate plate structure can no longer meet the cooling effect of the grate plate. Utility Model Content

[0004] In order to facilitate the cooling of the grate plates and extend the service life of the grate plates, the present application provides a grate plate for a high calorific value domestic waste incinerator.

[0005] The present application provides a high calorific value domestic waste incinerator grate plate adopts the following technical solution:

[0006] A grate plate for a high calorific value domestic waste incinerator includes a grate plate body, one end of the grate plate body is bent downward, and the other end of the grate plate body extends horizontally. Side baffles are fixedly arranged on both sides of the grate plate body, and a guide assembly is arranged between the side baffles. The guide assembly is used to allow cooling air to flow along the grate plate body. A water cooling pipe is fixedly arranged in the grate plate body, and the water cooling pipe is used to allow cooling water to flow along the grate plate body.

[0007] By adopting the above technical solution, the cooling water in the water-cooling pipe exchanges heat with the grate plate body, so that the grate plate body dissipates heat in a high-temperature environment. At the same time, the cooling air flows along the grate plate body through the guide component, accelerating the gas flow rate near the grate plate body, thereby improving the heat dissipation speed of the grate plate body in a high-temperature environment. Through the coordinated work of the two cooling methods of water cooling and air cooling, the grate plate is easy to cool down in a high-temperature environment, reducing the situation where the grate plate temperature is too high, and extending the service life of the grate plate.

[0008] Preferably, a plurality of positioning ribs are fixedly provided between the water-cooling tubes, the positioning ribs are located in the grate plate body, and the positioning ribs are fixedly connected to the grate plate body.

[0009] By adopting the above technical solution, after the water-cooling pipe is bent and arranged in a serpentine shape, positioning ribs are welded on the water-cooling pipe to fix the water-cooling pipe, and then the water-cooling pipe and the positioning ribs are placed in a wax mold, and heat-resistant cast steel is poured into the wax mold to form the grate plate body. After the heat-resistant cast steel is poured to form the grate plate body, the water-cooling pipe and the positioning ribs are located inside the grate plate body. The water-cooling pipe and the heat-resistant cast steel are cast as one piece. On the one hand, it is convenient to install the water-cooling pipe in the grate plate body, and on the other hand, it reduces the defects such as pores or cracks inside the grate plate body, thereby extending the service life of the grate plate.

[0010] Preferably, one end of the grate plate body is bent downward to form a bent portion, the other end of the grate plate body is extended horizontally to form a straight portion, one end of the water-cooling pipe is bent downward to form a vertical section, the vertical section is arranged parallel to the bent portion, and the vertical section is arranged in the bent portion, the other end of the water-cooling pipe is extended horizontally to form a horizontal section, the horizontal section is arranged parallel to the straight portion, and the horizontal section is arranged in the straight portion.

[0011] By adopting the above technical solution, the water cooling pipe is arranged along the shape of the grate plate body, so that the cooling water flows through the bent part and the straight part, so that the grate plate body is evenly water-cooled.

[0012] Preferably, a water inlet pipe and a water outlet pipe are provided at one end of the horizontal section away from the vertical section, and both the water inlet pipe and the water outlet pipe pass through one end of the straight portion away from the bent portion. A water inlet joint is provided on the end of the water inlet pipe outside the grate body, and a water outlet joint is provided on the end of the water outlet pipe outside the grate body.

[0013] By adopting the above technical solution, the water inlet joint and the water outlet joint are both connected to the cooling water system, so that the cooling water enters the water cooling pipe from the water inlet pipe. After the cooling water flows through the grate body along the water cooling pipe, the cooling water in the water cooling pipe returns to the cooling water system through the water outlet pipe for cooling, thereby achieving the effect of cooling water circulating in the water cooling pipe.

[0014] Preferably, the guide assembly includes a partition, a front baffle and a guide plate, and both sides of the partition, both sides of the front baffle and both sides of the guide plate are fixedly connected to the opposite surfaces of the side baffles, the partition and the front baffle are arranged parallel to the bent portion, the front baffle is located between the partition and the bent portion, the top of the partition and the bottom of the straight portion are in contact with each other, the top of the front baffle is fixedly connected to the bottom of the guide plate, a transverse air duct is formed between the top of the guide plate and the bottom of the straight portion, an air inlet channel is formed between the partition and the front baffle, and the air inlet channel and the transverse air duct are connected to each other.

[0015] By adopting the above technical solution, the cooling air flows from the bottom of the grate plate body to the grate plate body, the cooling air is blocked by the partition and the front baffle, and flows into the transverse channel from the air inlet channel, so that the cooling air flows along the straight part of the grate plate body, and the cooling air flushes the lower surface of the grate plate body, thereby improving the cooling effect of the cooling air on the grate plate body.

[0016] Preferably, the guide assembly also includes a rear baffle and a cutoff plate, the rear baffle is arranged parallel to the bent portion, the rear baffle is arranged between the front baffle and the bent portion, the top of the rear baffle is fixedly connected to the bottom of the guide plate, the two sides of the rear baffle are fixedly connected to the opposite surfaces of the side baffles, the cutoff plate is fixedly arranged between the rear baffle, the front baffle and the side baffles, a vertical air duct is formed between the rear baffle and the bent portion, and the horizontal air duct and the vertical air duct are connected to each other.

[0017] By adopting the above technical solution, the cooling air flows into the vertical air duct along the horizontal air duct, and the cooling air is blocked by the rear baffle, so that the cooling air flows along the bent part of the grate plate body, thereby improving the cooling effect of the cooling air on the grate plate body.

[0018] Preferably, the end of the air inlet channel away from the horizontal air duct is an air inlet, the end of the vertical air duct away from the horizontal air duct is an air outlet, and the area of ​​the air inlet is larger than the area of ​​the air outlet.

[0019] By adopting the above technical solution, since the area of ​​the air inlet is larger than the area of ​​the air outlet, the wind pressure in the air inlet channel, transverse channel and vertical channel is reduced, so that the cooling air flows stably in the air channel, transverse channel and vertical channel.

[0020] Preferably, a number of heat sinks are arranged in the horizontal air duct and the vertical air duct, and the heat sinks are parallel to the side baffles. One end of the heat sink is bent downward to form a vertical portion, and the vertical portion is located in the vertical air duct. One side of the vertical portion is in contact with the bent portion, and the other side of the vertical portion is fixedly connected to the rear baffle. The other end of the heat sink extends horizontally to form a horizontal portion, and the horizontal portion is located in the horizontal air duct. The top of the horizontal portion is in contact with the straight portion, and the bottom of the horizontal portion is fixedly connected to the guide plate.

[0021] By adopting the above technical solution, the heat sink increases the contact area between the grate plate body and the cooling air, thereby facilitating rapid cooling of the grate plate body.

[0022] In summary, this application includes at least one of the following beneficial technical effects:

[0023] 1. By setting up the grate body, side baffles, guide components and water cooling pipes, the grate can be easily cooled in a high temperature environment, reducing the situation of excessive temperature of the grate and extending the service life of the grate;

[0024] 2. By arranging partitions, front baffles, guide plates, rear baffles, intercepting plates, transverse air ducts, air inlet channels and vertical air ducts, the cooling air is allowed to flush the lower surface of the grate plate body, thereby improving the cooling effect of the cooling air on the grate plate body;

[0025] 3. By setting up heat sinks, the contact area between the grate body and the cooling air is increased, thereby facilitating rapid cooling of the grate body. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 This is a structural schematic diagram of a grate plate for a high calorific value domestic waste incinerator in an embodiment of the present application.

[0027] Figure 2 It is a cross-sectional view showing the positional relationship between the grate plate body and the water-cooling tube in the embodiment of the present application.

[0028] Figure 3 It is a schematic diagram of the water cooling pipe structure in the embodiment of the present application.

[0029] Figure 4 It is a cross-sectional view showing the positional relationship between the transverse air duct and the grate body in the embodiment of the present application.

[0030] Explanation of the accompanying symbols: 1. Grate body; 11. Bending portion; 12. Straight portion; 2. Side baffle; 3. Guide assembly; 31. Front baffle; 32. Rear baffle; 33. Partition; 34. Guide plate; 35. Shutoff plate; 4. Water-cooling pipe; 41. Vertical section; 42. Horizontal section; 43. Water inlet pipe; 431. Water inlet joint; 44. Water outlet pipe; 441. Water outlet joint; 5. Positioning rib; 6. Air inlet channel; 61. Air inlet; 7. Horizontal air duct; 8. Vertical air duct; 81. Air outlet; 9. Heat sink; 91. Vertical portion; 92. Horizontal portion. DETAILED DESCRIPTION

[0031] The following is combined with Figure 1-4 This application is described in further detail.

[0032] The present application discloses a grate plate for a high calorific value domestic waste incinerator. Figures 1 to 4, comprising a grate plate body 1, which is made of heat-resistant cast steel. One end of the grate plate body 1 is bent downward to form a bent portion 11, and the other end of the grate plate body 1 extends horizontally to form a straight portion 12. Side baffles 2 are installed on both sides of the grate plate body 1, and a guide assembly 3 is installed between the side baffles 2. The guide assembly 3 is used to allow cooling air to flow along the grate plate body 1. Water-cooling pipes 4 are installed in the grate plate body 1, and the water-cooling pipes 4 are arranged in a curved serpentine shape. After the water-cooling pipes 4 are arranged in a curved serpentine shape, positioning ribs 5 are welded to the water-cooling pipes 4 to fix the water-cooling pipes 4. Then, the water-cooling pipes 4 and positioning ribs 5 are placed in a wax mold, and heat-resistant cast steel is poured into the wax mold, so that the water-cooling pipes 4 and the grate plate body 1 are cast and formed as a whole. The overall bonding rate between the casting material and the water-cooling pipes 4 is not less than 95%, and the casting temperature is controlled between 1450-1550℃. The material of the water-cooling pipes 4 is heat-resistant stainless steel with a melting point higher than the casting temperature. On the one hand, it facilitates the installation of the water-cooling pipe 4 within the grate plate body 1, and on the other hand, it reduces the presence of defects such as pores or cracks within the grate plate body 1, thereby extending the service life of the grate plate. The cooling water in the water-cooling pipe 4 exchanges heat with the grate plate body 1, allowing the grate plate body 1 to dissipate heat in a high-temperature environment. At the same time, cooling air flows along the grate plate body 1 through the guide assembly 3, accelerating the gas flow rate near the grate plate body 1, thereby increasing the heat dissipation rate of the grate plate body 1 in a high-temperature environment. Through the coordinated operation of the two cooling methods of water cooling and air cooling, the grate plate is easily cooled in a high-temperature environment, the grate plate temperature is reduced, and the service life of the grate plate is extended.

[0033] In order to improve the water cooling effect of the grate body 1, refer to Figures 1 to 3One end of the water-cooling pipe 4 is bent downward to form a vertical section 41. The vertical section 41 is arranged parallel to the bent portion 11 and is distributed within the bent portion 11. The other end of the water-cooling pipe 4 extends horizontally to form a horizontal section 42. The horizontal section 42 is arranged parallel to the straight portion 12 and is distributed within the straight portion 12. The horizontal section 42 is connected to the end away from the vertical section 41 and is connected to a water inlet pipe 43 and a water outlet pipe 44. The water inlet pipe 43 and the water outlet pipe 44 both pass through the end of the straight portion 12 away from the bent portion 11. The water inlet pipe 43 is located on the end outside the grate body 1 and is installed with a water inlet joint 431. The water outlet pipe 44 is located on the end outside the grate body 1 and is installed with a water outlet joint 441. The water inlet connector 431 and the water outlet connector 441 are both connected to the cooling water system, allowing cooling water to enter the water-cooling pipe 4 through the water inlet pipe 43. After the cooling water flows through the grate body 1 along the water-cooling pipe 4, the cooling water in the water-cooling pipe 4 returns to the cooling water system through the water outlet pipe 44 for cooling, thereby achieving the effect of circulating the cooling water in the water-cooling pipe 4. Because the water-cooling pipe 4 is arranged along the shape of the grate body 1, the cooling water flows through the bent portion 11 and the straight portion 12, cooling both the straight portion 12 of the grate body 1 and the bent portion of the grate body 1, thereby achieving uniform water cooling of all parts of the grate body 1.

[0034] In order to improve the air cooling effect of the grate body 1, refer to Figure 1 and Figure 4The flow guide assembly 3 includes a partition 33, a front baffle 31, a flow guide 34, a rear baffle 32, and a shutoff plate 35. Both sides of the partition 33, the front baffle 31, the flow guide 34, the rear baffle 32, and the shutoff plate 35 are welded to the opposing surfaces of the side baffle 2. The partition 33, the front baffle 31, and the rear baffle 32 are all arranged parallel to the bent portion 11. The front baffle 31 is located between the partition 33 and the bent portion 11, and the rear baffle 32 is located between the front baffle 31 and the bent portion 11. The flow guide 34 and the shutoff plate 35 are both arranged parallel to the straight portion 12, with the flow guide 34 located between the shutoff plate 35 and the straight portion 12. The facing surfaces of the front baffle 31 and the rear baffle 32 are both in contact with the sidewalls of the interceptor plate 35. The tops of the front baffle 31 and the rear baffle 32 are both in contact with the bottoms of the guide plate 34. The top of the partition 33 is in contact with the bottom of the straight portion 12. An air inlet channel 6 is formed between the partition 33 and the front baffle 31. A transverse air duct 7 is formed between the top of the guide plate 34 and the bottom of the straight portion 12. A vertical air duct 8 is formed between the rear baffle 32 and the curved portion 11. The bottom end of the air inlet channel 6 is an air inlet 61, the top end of which communicates with one end of the transverse air duct 7. The bottom end of the vertical air duct 8 is an air outlet 81, the top end of which communicates with the transverse air duct 7. The area of ​​the air inlet 61 is larger than that of the air outlet 81, reducing the wind pressure within the air inlet channel 6, the transverse channels, and the vertical channels, allowing the cooling air to flow stably within the air channel, the transverse channels, and the vertical channels. When the cooling air flows from the bottom of the grate plate body 1 toward the grate plate body 1, the cooling air is blocked by the partition plate 33 and the front baffle 31, and flows into the transverse channel from the air inlet channel 6, so that the cooling air flows along the straight portion 12 of the grate plate body 1. The cooling air flows along the transverse air duct 7 into the vertical air duct 8, and the cooling air is blocked by the rear baffle 32, so that the cooling air flows along the bent portion 11 of the grate plate body 1. The cooling air flows along the grate plate body 1, thereby improving the cooling effect of the cooling air on the grate plate body 1.

[0035] In order to facilitate the rapid cooling of the grate body 1, refer to Figure 1 and Figure 4 , a number of heat sinks 9 are installed together in the horizontal air duct 7 and the vertical air duct 8, and the heat sink 9 is parallel to the side baffle 2. One end of the heat sink 9 is bent downward to form a vertical portion 91, and the vertical portion 91 is located in the vertical air duct 8. One side of the vertical portion 91 is in contact with the bent portion 11, and the other side of the vertical portion 91 is welded to the rear baffle 32. The other end of the heat sink 9 extends horizontally to form a transverse portion 92, and the transverse portion 92 is located in the horizontal air duct 7. The top of the transverse portion 92 is in contact with the straight portion 12, and the bottom of the transverse portion 92 is welded to the guide plate 34. The outer surface area of ​​the heat sink 9 is more than twice the area of ​​the bottom area of ​​the grate plate body 1, thereby increasing the contact area between the grate plate body 1 and the cooling air.

[0036] The implementation principle of the grate plate for a high calorific value domestic waste incinerator in the embodiment of the present application is as follows: the cooling water in the water-cooling tube 4 exchanges heat with the grate plate body 1, so that the grate plate body 1 dissipates heat in a high-temperature environment. At the same time, the cooling air flows along the grate plate body 1 through the horizontal air duct 7 and the vertical air duct 8, accelerating the gas flow rate near the grate plate body 1, thereby increasing the heat dissipation rate of the grate plate body 1 in a high-temperature environment. Since the water-cooling tube 4 is arranged along the shape of the grate plate body 1, the cooling water flows through the bent portion 11 and the straight portion 12, which can cool the straight portion 12 of the grate plate body 1 as well as the bent portion of the grate plate body 1, thereby achieving uniform water cooling of all parts of the grate plate body 1. Through the coordinated work of the two cooling methods of water cooling and air cooling, the grate plate is easy to cool down in a high-temperature environment, the situation of the grate plate being overheated is reduced, and the service life of the grate plate is extended.

[0037] The above are all preferred embodiments of the present application, and are not intended to limit the scope of protection of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the scope of protection of the present application.

Claims

1. A grate plate for a high calorific value domestic waste incinerator, comprising a grate plate body (1), one end of the grate plate body (1) being bent downward, and the other end of the grate plate body (1) being extended horizontally, characterized in that: Side baffles (2) are fixedly arranged on both sides of the grate plate body (1), a guide assembly (3) is arranged between the side baffles (2), and the guide assembly (3) is used to make cooling air flow along the grate plate body (1), and a water cooling pipe (4) is fixedly arranged inside the grate plate body (1), and the water cooling pipe (4) is used to make cooling water flow along the grate plate body (1).

2. According to a grate plate for a high calorific value domestic waste incinerator according to claim 1, a plurality of positioning ribs (5) are fixedly arranged between the water-cooling tubes (4), and the positioning ribs (5) are located inside the grate plate body (1), and the positioning ribs (5) are fixedly connected to the grate plate body (1).

3. The grate plate for a high calorific value domestic waste incinerator according to claim 1, characterized in that: One end of the grate plate body (1) is bent downward to form a bent portion (11), and the other end of the grate plate body (1) is extended horizontally to form a straight portion (12). One end of the water-cooling pipe (4) is bent downward to form a vertical section (41), and the vertical section (41) is arranged parallel to the bent portion (11). The vertical section (41) is arranged inside the bent portion (11). The other end of the water-cooling pipe (4) is extended horizontally to form a horizontal section (42), and the horizontal section (42) is arranged parallel to the straight portion (12). The horizontal section (42) is arranged inside the straight portion (12).

4. The grate plate for a high calorific value domestic waste incinerator according to claim 3, characterized in that: The horizontal section (42) is connected to an end away from the vertical section (41) and is provided with a water inlet pipe (43) and a water outlet pipe (44). The water inlet pipe (43) and the water outlet pipe (44) both pass through an end of the straight portion (12) away from the bent portion (11). The water inlet pipe (43) is provided with a water inlet joint (431) on an end outside the grate plate body (1), and the water outlet pipe (44) is provided with a water outlet joint (441) on an end outside the grate plate body (1).

5. The grate plate for a high calorific value domestic waste incinerator according to claim 3, characterized in that: The air guide assembly (3) comprises a partition (33), a front baffle (31) and a air guide (34); both sides of the partition (33), both sides of the front baffle (31) and both sides of the air guide (34) are fixedly connected to the opposite surfaces of the side baffle (2); the partition (33) and the front baffle (31) are both arranged parallel to the bent portion (11); the front baffle (31) is located between the partition (33) and the bent portion (11); the top of the partition (33) and the bottom of the straight portion (12) are in contact with each other; the top of the front baffle (31) and the bottom of the air guide (34) are fixedly connected; a transverse air duct (7) is formed between the top of the air guide (34) and the bottom of the straight portion (12); an air inlet channel (6) is formed between the partition (33) and the front baffle (31); and the air inlet channel (6) and the transverse air duct (7) are communicated with each other.

6. The grate plate for a high calorific value domestic waste incinerator according to claim 5, characterized in that: The air guide assembly (3) further comprises a rear baffle (32) and a intercepting plate (35), wherein the rear baffle (32) is arranged parallel to the bent portion (11), and the rear baffle (32) is arranged between the front baffle (31) and the bent portion (11), the top of the rear baffle (32) is fixedly connected to the bottom of the air guide plate (34), and both sides of the rear baffle (32) are fixedly connected to the opposite surfaces of the side baffles (2), and the intercepting plate (35) is fixedly arranged between the rear baffle (32), the front baffle (31) and the side baffles (2), a vertical air duct (8) is formed between the rear baffle (32) and the bent portion (11), and the transverse air duct (7) and the vertical air duct (8) are communicated with each other.

7. The grate plate for a high calorific value domestic waste incinerator according to claim 6, characterized in that: The end of the air inlet channel (6) away from the transverse air duct (7) is an air inlet (61), and the end of the vertical air duct (8) away from the transverse air duct (7) is an air outlet (81), and the area of ​​the air inlet (61) is larger than the area of ​​the air outlet (81).

8. The grate plate for a high calorific value domestic waste incinerator according to claim 6, characterized in that: A plurality of heat sinks (9) are provided in the transverse air duct (7) and the vertical air duct (8). The heat sinks (9) and the side baffles (2) are parallel to each other. One end of the heat sink (9) is bent downward to form a vertical portion (91). The vertical portion (91) is located in the vertical air duct (8). One side of the vertical portion (91) is in contact with the bent portion (11). The other side of the vertical portion (91) is fixedly connected to the rear baffle (32). The other end of the heat sink (9) extends horizontally to form a transverse portion (92). The transverse portion (92) is located in the transverse air duct (7). The top of the transverse portion (92) is in contact with the straight portion (12). The bottom of the transverse portion (92) is fixedly connected to the guide plate (34).

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