Secondary combustion chamber of rotary kiln system for resource recovery of solid and hazardous waste

Abstract

The present application relates to a secondary combustion chamber of a rotary kiln resource disposal system for solid and hazardous waste, comprising a support assembly, a lower shell, a middle shell and a first sealing assembly. The lower shell and the middle shell are connected to the support assembly. The middle shell is located at the upper end of the lower shell and its lower end is located inside the lower shell. A first flange is provided at the upper end of the lower shell, and a first gap is provided between the middle shell and the first flange. The first sealing assembly is connected to the first flange and the middle shell. The first sealing assembly comprises a cover plate, a sealing member and a pressing member. The cover plate is arranged on the first flange, and the sealing member is arranged inside the cover plate. One side of the sealing member abuts against the outer side of the middle shell, and the other side of the sealing member abuts against the cover plate. The pressing member is arranged on the cover plate and abuts against the sealing member, and the pressing member is used to press the sealing member. The sealing structure of the present application is easy to install and is not affected by the thermal expansion of the shell caused by temperature rise changes, which affects the sealing effect.

Description

Technical Field

[0001] The present application relates to a garbage treatment kiln, and in particular to a secondary combustion chamber of a rotary kiln system for resource recovery and disposal of solid and hazardous wastes. Background Art

[0002] See also Figure 1 , which is a schematic diagram of the junction of the middle and lower parts of the existing secondary combustion chamber. As shown in the figure, the junction of the middle part A and the lower part B of the existing secondary combustion chamber is usually connected by a sealing gasket C. Due to the increase in temperature during operation, all parts have thermal expansion, and it is difficult to ensure the control amount of the sealing gasket at the junction during the manufacturing and installation error of the shell and the installation of the sealing gasket layer, resulting in leakage of the secondary combustion chamber during operation or deformation of the outer support frame. Summary of the invention

[0003] The embodiment of the present application provides a secondary combustion chamber of a rotary kiln system for resource recovery and disposal of solid and hazardous wastes, which solves the problem of leakage or deformation of the outer support frame caused by thermal expansion at the junction of the middle and lower parts of the existing secondary combustion chamber during operation.

[0004] To solve the above technical problems, this application is implemented as follows:

[0005] In the first aspect, a secondary combustion chamber of a rotary kiln resource disposal system for solid hazardous waste is provided, which includes a bracket assembly, a lower shell, a middle shell and a first sealing assembly. The lower shell is connected to the bracket assembly, and a first flange is provided at the upper end of the lower shell. The middle shell is connected to the bracket assembly and is located at the upper end of the lower shell. The lower end of the middle shell is located inside the lower shell, and a first gap is provided between the middle shell and the first flange. The first sealing assembly is connected to the first flange and the middle shell. The first sealing assembly includes a cover plate member, a sealing member and a pressing member, the cover plate member is arranged on the first flange, the sealing member is arranged inside the cover plate member, and one side of the sealing member abuts against the outer side of the middle shell, and the other side of the sealing member abuts against the cover plate member. The pressing member is arranged on the cover plate member and abuts against the sealing member, and the pressing member is used to press the sealing member.

[0006] In a first possible implementation of the first aspect, the cover plate member includes a connecting plate and a cover plate, the connecting plate is arranged on the first flange, the cover plate is arranged on the connecting plate, the cover plate and the connecting plate form a cavity opening toward one side of the middle shell, and the sealing member is arranged in the cavity.

[0007] In combination with the first possible implementation of the first aspect, in a second possible implementation of the first aspect, the clamping member includes a pressure plate and an adjusting bolt, the pressure plate is arranged on the sealing member, the adjusting bolt is arranged on the cover plate and abuts against the pressure plate, and the adjusting bolt presses the sealing member onto the connecting plate through the pressure plate.

[0008] In combination with the first possible implementation of the first aspect, in a third possible implementation of the first aspect, a second gap is provided between the top of the cover plate and the middle shell, and a third gap is provided between the connecting plate and the middle shell.

[0009] In a fourth possible implementation of the first aspect, the side surface of the lower shell is connected to the discharge end of the garbage kiln, and the lower end of the lower shell is provided with a particle discharge port.

[0010] In a fifth possible implementation of the first aspect, an upper shell and a second sealing assembly are further included. The upper shell is connected to the bracket assembly and is located at the upper end of the middle shell, and the lower end of the upper shell is located in the middle shell. A second flange is provided at the upper end of the middle shell, and a fourth gap is provided between the upper shell and the second flange. The second sealing assembly is connected to the second flange and the upper shell, and is used for sealing between the middle shell and the upper shell.

[0011] In combination with the fifth possible implementation of the first aspect, in a sixth possible implementation of the first aspect, the upper shell is provided with a common smoke duct, an emergency smoke duct and a chimney. The common smoke duct is an outlet for the smoke treated in the secondary combustion chamber to enter the next process for reprocessing. The emergency smoke duct is connected to the chimney. An explosion-proof door structure is provided on the emergency smoke duct. When the smoke pressure in the secondary combustion chamber exceeds the pressure value of the explosion-proof door structure, the explosion-proof door structure opens to allow the emergency smoke duct to pass to discharge the smoke.

[0012] In combination with the sixth possible implementation of the first aspect, in the seventh possible implementation of the first aspect, the explosion-proof door structure includes a water tank, a water inlet pipe, a liquid level gauge, an explosion-proof door and a linkage assembly, the water tank is arranged at the upper end of the emergency smoke gas pipe, the water inlet pipe and the liquid level gauge are arranged on the side wall of the water tank, the explosion-proof door is arranged on the water tank, and the lower end of the explosion-proof door is abutted against the inner cavity end face of the water tank, the peripheral wall of the explosion-proof door extends downward into the water tank and is immersed in water, the linkage assembly is arranged on the chimney and connected to the explosion-proof door, and the linkage assembly is used to control the opening and resetting of the explosion-proof door.

[0013] In combination with the seventh possible implementation of the first aspect, in an eighth possible implementation of the first aspect, the linkage assembly includes a cylinder, an arm group, an arm shaft and a connecting shaft, the cylinder is arranged on the chimney, the arm group is pivoted to the chimney through the arm shaft, the cylinder is connected to one end of the arm group, and the other end of the arm group is pivoted to the explosion-proof door through the connecting shaft.

[0014] In combination with the fifth possible implementation manner of the first aspect, in a ninth possible implementation manner of the first aspect, the second sealing assembly has the same structure as the first sealing assembly.

[0015] Compared with the prior art, the present invention has the following advantages:

[0016] The secondary combustion chamber of the rotary kiln resource disposal system for solid and hazardous waste of the present application has a first flange at the upper end of the lower shell, a cover plate member is provided on the first flange, a sealing member is arranged in the cover plate member, and the two sides of the sealing member are respectively abutted against the middle shell and the cover plate member. This sealing structure is easy to install and is not affected by the thermal expansion of the shell due to temperature rise changes and the influence of the sealing effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0018] Figure 1 It is a schematic diagram of the intersection of the middle and lower parts of the existing secondary combustion chamber.

[0019] Figure 2 It is a schematic diagram of the secondary combustion chamber of the rotary kiln resource disposal system for solid and hazardous wastes according to one embodiment of the present application;

[0020] Figure 3 It is a cross-sectional schematic diagram of a secondary combustion chamber of a rotary kiln resource disposal system for solid and hazardous wastes according to an embodiment of the present application;

[0021] Figure 4 yes Figure 3 A local enlarged schematic diagram of the X in the middle;

[0022] Figure 5 yes Figure 3 A local enlarged schematic diagram of the Y point in the middle. DETAILED DESCRIPTION

[0023] For the secondary combustion chamber, due to the temperature rise during operation, the shells of the secondary combustion chamber will expand thermally. Therefore, the joints of the shells of the existing secondary combustion chamber are sealed with gaskets. However, due to the manufacturing errors of the shells of the secondary combustion chamber and the different temperatures of the gasket layers, it is difficult to ensure the control amount during installation, which leads to leakage problems when the secondary combustion chamber is working.

[0024] The secondary combustion chamber of the rotary kiln resource disposal system for solid and hazardous waste of the present application is provided with a first flange at the upper end of the lower shell, and a first sealing component is added circumferentially to the outer side of the middle shell to achieve sealing at the intersection of the middle shell and the lower shell. This sealing structure connection is not affected by the thermal expansion of the shell due to temperature rise.

[0025] In order to make the objectives, technical solutions and advantages of the present application clearer, the implementation methods of the present application will be further described in detail below with reference to the accompanying drawings.

[0026] The terms “first”, “second”, etc. used in this document do not specifically refer to an order or sequence, nor are they used to limit this application. They are merely used to distinguish components or operations described with the same technical terms.

[0027] See also Figure 2 and Figure 3 , Figure 2 Schematic diagram of the secondary combustion chamber of the rotary kiln resource disposal system for solid and hazardous wastes according to one embodiment of the present application. Figure 3 The figure is a cross-sectional schematic diagram of the secondary combustion chamber of the rotary kiln resource treatment system for solid and hazardous wastes according to one embodiment of the present application. As shown in the figure, the secondary combustion chamber 1 of the rotary kiln resource treatment system for solid and hazardous wastes includes a support assembly 2, a lower shell 3, a middle shell 4 and a first sealing assembly 5. The lower shell 3 and the middle shell 4 are connected to the support assembly 2. The middle shell 4 is located at the upper end of the lower shell 3 and its lower end is located inside the lower shell 3. Specifically, as shown in FIG. Figure 2 As shown, the bracket assembly 2 includes a first support 21 and a second support 22, the second support 22 is located above the first support 21, the first support 21 is fixedly connected to the lower shell 3, and the second support 22 is fixedly connected to the middle shell 4. The first support 21 and the second support 22 support the lower shell 3 and the middle shell 4 respectively, but not limited to this.

[0028] As mentioned above, the side of the lower shell 3 is connected to the discharge end of the garbage kiln, and the lower end of the lower shell 3 is provided with a particle discharge port. The upper end of the lower shell 3 is provided with a first flange 31. Figure 4 , which is Figure 3 A partial enlarged schematic diagram of the X in the middle. As shown in the figure, the first flange 31 is arranged horizontally, and the first flange 31 is connected to the upper end of the lower shell 3 by welding, but this is not limited to this. There is a first gap S1 between the middle shell 4 and the first flange 31, which can leave a margin for the thermal expansion of the middle shell 4 and facilitate the installation and fixation between the middle shell 4 and the lower shell 3. As for the size of the first gap S1, it can be selected according to actual needs, and this application may not have special requirements for this.

[0029] See also Figure 2 and Figure 4 As shown, the first sealing assembly 5 is connected to the first flange 31 and the middle shell 4, and is used for sealing the intersection of the middle shell 4 and the lower shell 3. The first sealing assembly 5 includes a cover plate 51, a sealing member 52 and a pressing member 53. The cover plate 51 is arranged on the first flange 31, as shown in FIG. Figure 2 As shown, the cover plate 51 surrounds the circumference of the junction between the middle shell 4 and the lower shell 3, as shown in FIG. Figure 4As shown, there is a gap between the upper end of the cover plate 51 and the middle shell 4, which can reduce the installation accuracy, facilitate the installation and fixation of the first sealing assembly 5, and also leave a margin for the thermal expansion of the middle shell 4. As for the size of the second gap S2, it can be selected according to actual needs, and the present application may have no special requirements for this.

[0030] As mentioned above, the sealing member 52 is disposed in the cover plate member 51. One side of the sealing member 52 abuts against the outer side of the middle shell 4, and the other side of the sealing member 52 abuts against the cover plate member 51. Figure 4 As shown, the seal 52 is located on the cover plate 51, the left side of the seal 52 abuts against the middle shell 4, and the right side of the seal 52 abuts against the cover plate 51. When the middle shell 4 expands thermally, it will squeeze the seal 52 to the right, further increasing the sealing effect of the seal 52. This sealing structure connection is not affected by the thermal expansion of the shell due to temperature rise changes and the sealing effect is affected. The pressing member 53 is set on the cover plate 51, and the pressing member 53 abuts against the seal 52. The pressing member 53 is used to press the seal 52 to prevent it from being affected by the thermal expansion of the shell due to temperature rise changes and affecting the sealing effect.

[0031] The following describes the structures of the cover plate member 51 and the pressing member 53. Figure 4 As shown, the cover plate member 51 includes a connecting plate 511 and a cover plate 512. The connecting plate 511 is arranged on the first flange 31, and the cover plate 512 is arranged on the connecting plate 511, and the cover plate 512 is arranged on the first flange 31 through the connecting plate 511. Specifically, the cover plate 512 and the connecting plate 511 are connected by welding, and the connecting plate 511 is connected to the first flange 31 by bolts, and there is a second gap S2 between the top of the cover plate 512 and the middle shell 4, and there is a third gap S3 between the connecting plate 511 and the middle shell 4, so as to facilitate their installation and fixation, and at the same time leave a margin for the thermal expansion of the middle shell 4, but it is not limited thereto.

[0032] As described above, the cover plate 512 and the connecting plate 511 form a cavity opened toward one side of the middle shell 4, and the sealing member 52 is arranged in the cavity. In other words, the cover plate member 51 is a shell with an opening toward one side of the middle shell 4, and a second gap S2 and a third gap S3 are provided between the shell and the middle shell 4, and the cover plate member 51 and the middle shell 4 are sealed by the sealing member 52. In this embodiment, the pressing member 53 includes a pressing plate 531 and an adjusting bolt 532. The pressing plate 531 is arranged on the sealing member 52, and the adjusting bolt 532 is arranged on the cover plate 512 and abuts against the pressing plate 531, and the adjusting bolt 532 presses the sealing member 52 against the connecting plate 511 through the pressing plate 531.

[0033] In one embodiment, refer to Figure 2As shown, the secondary combustion chamber 1 of the rotary kiln resource disposal system for solid and hazardous wastes also includes an upper shell 6 and a second sealing assembly 7. The upper shell 6 is connected to the bracket assembly 2 and is located at the upper end of the middle shell 4. The lower end of the upper shell 6 is located in the middle shell 4. Figure 1 As shown, the bracket assembly 2 includes a third support 23, the third support 23 is located above the second support 22, the third support 23 is fixedly connected to the upper shell 6, and the third support 23 supports the upper shell 6, but is not limited thereto.

[0034] As mentioned above, the upper end of the middle shell 4 is provided with a second flange 41. In the present embodiment, the second flange 41 is arranged horizontally, and the second flange 41 is connected to the upper end of the middle shell 4 by welding, but it is not limited thereto. There is a fourth gap between the upper shell 6 and the second flange 41, which can leave a margin for the thermal expansion of the upper shell 6 and facilitate the installation and fixation between the upper shell 6 and the middle shell 4. As for the size of the fourth gap, it can be selected according to actual needs, and the present application may not have special requirements for this. The second sealing assembly 7 is connected to the second flange 41 and the upper shell 6. The second sealing assembly 7 is used for sealing between the middle shell 4 and the upper shell 6. In the present embodiment, the second sealing assembly 7 has the same structure as the first sealing assembly 5. The specific structure is referred to the above description, and the present application will not repeat it here.

[0035] In this embodiment, refer to Figure 3 As shown, the upper shell 6 is provided with a common smoke duct 61, an emergency smoke duct 62 and a chimney 63. The common smoke duct 61 is used to supply the smoke treated in the secondary combustion chamber to the outlet for further treatment in the next process. The emergency smoke duct 62 is connected with the chimney 63. The emergency smoke duct 62 is provided with an explosion-proof door structure 64. When the smoke pressure in the secondary combustion chamber exceeds the pressure value of the explosion-proof door structure 64, the explosion-proof door structure 64 opens, so that the emergency smoke duct 62 and the chimney 63 form a passage, and the smoke is discharged through the chimney 63 to ensure the safety of the secondary combustion chamber.

[0036] For the existing explosion-proof door structure, it adopts a conical surface matching sealing form, and the opening and closing is controlled by the cylinder pneumatic system outside the shell through the rotating shaft connecting rod and other components. The structure is complex and the manufacturing requirements are high. The explosion-proof door structure 64 of the present application adopts an end face plus water groove sealing structure, which has a better sealing effect. At the same time, the cylinder and arm are arranged on the chimney, which has a compact structure and reliable operation. In order to make the technical solution and advantages of the explosion-proof door structure 64 clearer, the explosion-proof door structure 64 of the present application will be further described in detail in conjunction with the accompanying drawings.

[0037] See also Figure 5 , which is Figure 3A partial enlarged schematic diagram at Y in the middle. As shown in the figure, the explosion-proof door structure 64 includes a water tank 641, a water inlet pipe 642, a liquid level gauge 643, an explosion-proof door 644 and a linkage assembly 645. The water tank 641 is arranged at the upper end of the emergency smoke gas pipe 62. The water inlet pipe 642 and the liquid level gauge 643 are arranged on the side wall of the water tank 641, and the water inlet pipe 642 and the liquid level gauge 643 cooperate to control the water level height of the water tank 641. The explosion-proof door 644 is arranged on the water tank 641. The lower end of the explosion-proof door 644 abuts against the inner cavity end face of the water tank 641, and the peripheral wall of the explosion-proof door 644 extends downward into the water tank 641 and is immersed in water, so that a sealing structure of an end face plus a water tank is formed between the explosion-proof door 644 and the emergency smoke gas pipe 62, so that the sealing effect is better.

[0038] See also Figure 5 As shown, the linkage assembly 645 is arranged on the chimney 63 and connected to the explosion-proof door 644. The linkage assembly 645 is used to control the opening and resetting of the explosion-proof door 644. In this embodiment, the linkage assembly 645 includes a cylinder 6451, an arm group 6452, an arm shaft 6453 and a connecting shaft 6454. The cylinder 6451 is arranged on the chimney 63. The arm group 6452 is pivotally connected to the chimney 63 through the arm shaft 6453. The cylinder 6451 is connected to one end of the arm group 6452, and the other end of the arm group 6452 is pivotally connected to the explosion-proof door 644 through the connecting shaft 6454. The cylinder 6451 drives the opening and resetting of the explosion-proof door 644 through the arm group 6452, and the structure is compact and the action is reliable.

[0039] In summary, the present application provides a secondary combustion chamber of a rotary kiln resource disposal system for solid hazardous waste. A first flange is provided at the upper end of the lower shell, a cover plate is provided on the first flange, a seal is provided in the cover plate, and the two sides of the seal are respectively abutted against the middle shell and the cover plate. This sealing structure is easy to install and is not affected by the thermal expansion of the shell due to temperature rise changes, which affects the sealing effect.

[0040] At the same time, the present application also adopts this sealing structure at the junction of the upper shell and the middle shell to further increase the sealing effect of the secondary combustion chamber. In addition, the explosion-proof door structure of the present application adopts an end face with a water groove sealing structure, which has a better sealing effect. At the same time, the cylinder and the arm are arranged on the chimney, which has a compact structure and reliable operation.

[0041] It should be noted that, in this article, the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the sentence "comprises a ..." does not exclude the existence of other identical elements in the process, method, article or device including the element.

[0042] The embodiments of the present application are described above in conjunction with the accompanying drawings, but the present application is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Under the guidance of the present application, ordinary technicians in this field can also make many forms without departing from the purpose of the present application and the scope of protection of the claims, all of which are within the protection of the present application.

Claims

1. A secondary combustion chamber of a rotary kiln system for recycling solid and hazardous wastes. It is characterized in that include: Bracket assembly; A lower shell body connected to the bracket assembly, wherein the upper end of the lower shell body is provided with a first flange; A middle shell connected to the bracket assembly and located at the upper end of the lower shell, the lower end of the middle shell is located inside the lower shell, and a first gap is formed between the middle shell and the first flange; a first sealing assembly connected to the first flange and the middle shell, the first sealing assembly comprising a cover plate, a sealing member and a pressing member, the cover plate being arranged on the first flange, the sealing member being arranged in the cover plate, one side of the sealing member abutting against the outer side of the middle shell, the other side of the sealing member abutting against the cover plate, the pressing member being arranged on the cover plate and abutting against the sealing member, and the pressing member being used to press the sealing member; The cover plate member includes a connecting plate and a cover plate, the connecting plate is arranged on the first flange, the cover plate is arranged on the connecting plate, the cover plate and the connecting plate form a cavity opening toward one side of the middle shell, and the sealing member is arranged in the cavity; The pressing member includes a pressing plate and an adjusting bolt, wherein the pressing plate is arranged on the sealing member, the adjusting bolt is arranged on the cover plate and abuts against the pressing plate, and the adjusting bolt presses the sealing member onto the connecting plate through the pressing plate; A second gap is provided between the top of the cover plate and the middle shell, and a third gap is provided between the connecting plate and the middle shell.

2. The secondary combustion chamber of the rotary kiln resource disposal system for solid and hazardous waste according to claim 1, It is characterized in that The side surface of the lower shell is connected to the discharge end of the garbage kiln, and the lower end of the lower shell is provided with a particle discharge port.

3. The secondary combustion chamber of the rotary kiln resource disposal system for solid and hazardous waste according to claim 1, It is characterized in that Also includes: an upper shell connected to the bracket assembly and located at the upper end of the middle shell, the lower end of the upper shell being located inside the middle shell, the upper end of the middle shell being provided with a second flange, and a fourth gap being provided between the upper shell and the second flange; The second sealing assembly is connected to the second flange and the upper shell and is used for sealing between the second flange and the upper shell.

4. The secondary combustion chamber of the rotary kiln resource disposal system for solid and hazardous waste according to claim 3, It is characterized in that The upper shell is provided with a common smoke duct, an emergency smoke duct and a chimney. The common smoke duct is an outlet for the smoke treated in the secondary combustion chamber to enter the next process for reprocessing. The emergency smoke duct is connected to the chimney. An explosion-proof door structure is provided on the emergency smoke duct. When the smoke pressure in the secondary combustion chamber exceeds the pressure value of the explosion-proof door structure, the explosion-proof door structure opens to allow the emergency smoke duct to pass to discharge smoke.

5. The secondary combustion chamber of the rotary kiln resource disposal system for solid and hazardous waste according to claim 4, It is characterized in that The explosion-proof door structure includes a water tank, a water inlet pipe, a liquid level gauge, an explosion-proof door and a linkage assembly. The water tank is arranged at the upper end of the emergency smoke pipe, the water inlet pipe and the liquid level gauge are arranged on the side wall of the water tank, the explosion-proof door is arranged on the water tank, and the lower end of the explosion-proof door abuts against the inner cavity end surface of the water tank, the peripheral wall of the explosion-proof door extends downward into the water tank and is immersed in water, the linkage assembly is arranged on the chimney and connected to the explosion-proof door, and the linkage assembly is used to control the opening and resetting of the explosion-proof door.

6. The secondary combustion chamber of the rotary kiln resource disposal system for solid and hazardous waste according to claim 5, It is characterized in that The linkage assembly includes a cylinder, an arm group, an arm shaft and a connecting shaft. The cylinder is arranged on the chimney, the arm group is pivotally connected to the chimney through the arm shaft, the cylinder is connected to one end of the arm group, and the other end of the arm group is pivotally connected to the explosion-proof door through the connecting shaft.

7. The secondary combustion chamber of the rotary kiln resource disposal system for solid and hazardous waste according to claim 3, It is characterized in that The second sealing component has the same structure as the first sealing component.

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