Lower header device of horizontal waste heat boiler for waste incineration

Abstract

The utility model discloses a waste incineration horizontal waste heat boiler lower header device which comprises a lower header, the lower header comprises a lower header outer end and a lower header body, the upper side of the lower header outer end is vertically communicated with a downcomer joint, the front side of the lower header outer end is horizontally communicated with a drain pipe joint, and the drain pipe joint is communicated with a drain pipe. The upper end of the lower header body is communicated with a second-third channel partition wall water-cooled wall tube panel, side wall water-cooled wall tube panels are arranged at the front end and the rear end of the second-third channel partition wall water-cooled wall tube panel respectively, and round through holes corresponding to the second-third channel partition wall water-cooled wall tube panel are formed in the side wall water-cooled wall tube panels. The inner diameter of the circular through hole is in clearance fit with the outer diameter of the lower header body. The device has the advantages that the installation problem is well solved, meanwhile, the problem that due to the fact that the number of quadrants where the pipe joints of the lower collecting box are located is large, the pipe joints are abraded in the transportation process, and deformation is caused is solved, the width between the ash hopper and the flue is enlarged, the ash deposition situation of the second flue is reduced, and the service life of the device is prolonged.

Description

Technical Field

[0001] The utility model relates to the field of garbage incineration, in particular to a lower header device of a horizontal waste heat boiler for garbage incineration. Background Art

[0002] In recent years, with the continuous improvement of people's living standards, the total amount of garbage generated has increased. It is necessary to treat the garbage harmlessly to reduce the pollution to the environment. At present, the method used for harmless treatment of garbage is mainly pyrolysis incineration. During the incineration process, a large amount of high-temperature flue gas is generated. Usually, a waste heat boiler is installed at the back of the waste incinerator to recover and reuse the heat in this high-temperature flue gas.

[0003] The traditional waste heat boiler supporting the pyrolysis incineration system adopts staggered parallel water-cooled walls to form the first flue gas channel, the second flue gas channel and the third flue gas channel. The lower header of the water-cooled wall tube screen of the second and third channel partition walls is generally at the same horizontal plane as the side wall water-cooled wall tube screen. Due to the temperature drop during the transition from the second flue to the third flue, the water-cooled wall and the lower header between the second flue and the third flue will suffer from serious dust accumulation and adhesion during actual operation, which is difficult to clean. In more serious cases, the entire convection tube bundle is blocked by dust accumulation, causing system shutdown failure, which will not only shorten the life of the equipment, but also require staff to frequently clean it, reducing the working efficiency of the device.

[0004] Therefore, how to solve the problem of ash accumulation and sticking in the waste heat boiler of the garbage pyrolysis incineration system in the existing technology, which is inconvenient to clean, has become an important technical problem to be solved by those skilled in the art. Utility Model Content

[0005] The purpose of the utility model is to provide a lower header device for a horizontal waste heat boiler for garbage incineration, so as to solve the above-mentioned technical problem that dust accumulation and adhesion easily occur in the second and third flue gas channels, which is inconvenient to clean.

[0006] In order to solve the above technical problems, the utility model provides a lower header device of a horizontal waste heat boiler for waste incineration, which includes a lower header, and the lower header includes an outer end of the lower header and a lower header body. The upper side of the outer end of the lower header is vertically connected to a downcomer pipe joint, and the front side of the outer end of the lower header is horizontally connected to a drain pipe joint. The upper end of the lower header body is connected to the second and third channel partition wall water-cooled wall tube panel. Side wall water-cooled wall tube panels are respectively provided at the front and rear ends of the second and third channel partition wall water-cooled wall tube panel. Circular through holes are provided on the side wall water-cooled wall tube panel corresponding to the second and third channel partition wall water-cooled wall tube panel, and the inner diameter of the circular through hole is clearance-matched with the outer diameter of the lower header body.

[0007] Furthermore, a first- and second-channel partition wall water-cooled wall tube panel is arranged on the left side of the second- and third-channel partition wall water-cooled wall tube panel, and a rear wall water-cooled wall is arranged on the right side of the second- and third-channel partition wall water-cooled wall tube panel. The first- and second-channel partition wall water-cooled wall tube panel and the left side of the second- and third-channel partition wall water-cooled wall tube panel form a second flue, and the second- and third-channel partition wall water-cooled wall tube panel and the rear wall water-cooled wall form a third flue.

[0008] Furthermore, a side wall water-cooled wall header is provided below the side wall water-cooled wall tube panel, an ash hopper is provided below the side wall water-cooled wall header, and the ash hopper is located directly below the second flue and the third flue.

[0009] Furthermore, the vertical spacing between the lower header and the side wall water-cooled wall header is 500mm-1500mm.

[0010] Furthermore, lower headers are respectively provided on the front and rear sides below the second and third channel partition water-cooled wall tube panels, and the lower headers are mirror-symmetrical.

[0011] Furthermore, a row of pipe joints is provided at the upper end of the lower header body, and the second and third channel partition water-cooled wall tube panels are connected to the lower header body through the row of pipe joints.

[0012] The beneficial effects of the utility model are as follows: a lower header device for a horizontal waste heat boiler for garbage incineration, compared with the prior art, divides the lower header into two sections, one section is the outer end of the lower header, and the other section is the lower header body, first the lower header body is passed through the through holes on the side wall water-cooled wall tube panel, the second and third channel partition wall water-cooled wall tube panels are connected to the lower header body through rows of pipe joints, and the fixed connection is completed by on-site welding; then the outer end of the lower header and the lower header body are coaxially aligned and welded to each other, and then the downcomer and the downcomer pipe joint are welded respectively, and the drain pipe pipe joint is welded to the drain pipe, which not only solves the above-mentioned installation problem, but also solves the problem that the pipe joints of the lower header are located in multiple quadrants and thus wear and deformation are caused during transportation, expands the width between the ash hopper and the flue, reduces ash accumulation in the second flue, and increases the service life of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a structural diagram of the lower header device of the second and third channel partition water-cooled wall.

[0014] Figure 2 This is a structural diagram of the second and third channels.

[0015] Figure 3 Schematic diagram of the structure of the overall flue gas channel.

[0016] Among them: 1. Lower header; 11. Outer end of lower header; 112. Downcomer pipe joint; 113. Drain pipe joint; 12. Lower header body; 2. Side wall water-cooled wall header; 3. Side wall water-cooled wall tube screen; 4. Second and third channel partition wall water-cooled wall tube screen; 5. Second flue; 6. Third flue; 7. Ash hopper; 8. Rear wall water-cooled wall; 9. First and second channel partition wall water-cooled wall tube screen; 10. First flue; 15. Furnace; 16. Circular through hole. DETAILED DESCRIPTION

[0017] The following will be combined with the accompanying drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiment described is only one embodiment of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0018] In order to make the objectives, technical solutions and advantages of this application clearer, this application is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0019] In the following description, references to "one embodiment," "an embodiment," "an example," "an example," etc. indicate that the embodiment or example described may include certain features, structures, characteristics, properties, elements, or limitations, but not every embodiment or example necessarily includes the certain features, structures, characteristics, properties, elements, or limitations. In addition, repeated use of the phrase "according to one embodiment of the present application" may refer to the same embodiment, but does not necessarily refer to the same embodiment.

[0020] In this embodiment: Figure 1As shown, it includes a lower header 1, which includes a lower header outer end 11 and a lower header body 12. The upper side of the lower header outer end 11 is vertically connected to a downcomer pipe joint 112, and the front side of the lower header outer end 11 is horizontally connected to a drain pipe joint 113. The upper end of the lower header body 12 is connected to the second and third channel partition wall water-cooled wall tube panel 4. The front and rear ends of the second and third channel partition wall water-cooled wall tube panel 4 are respectively provided with side wall water-cooled wall tube panel 3. The side wall water-cooled wall tube panel 3 is provided with a circular through hole 16 corresponding to the second and third channel partition wall water-cooled wall tube panel 4. The inner diameter of the circular through hole 16 is clearance-matched with the outer diameter of the lower header body 12. Since the lower header 1 is in the The higher position requires passing through the side wall water-cooled wall tube panel 3. If it is manufactured conventionally and shipped as a whole, the lower header 1 will be difficult to install or even impossible to install normally during on-site installation because the rows of tube panel pipe joints, the two downcomer pipe joints 112 and the drain pipe pipe joint 113 are not in the same quadrant. Therefore, the lower header 1 is divided into two sections, one section is the lower header outer end 11, and the other section is the lower header body 12. This not only solves the above-mentioned installation problem, but also solves the problem that the pipe joints of the lower header 1 are located in many quadrants and the pipe joints will be worn and deformed during transportation.

[0021] A first- and second-channel partition wall water-cooled wall tube panel 9 is arranged on the left side of the second- and third-channel partition wall water-cooled wall tube panel 4, and a rear wall water-cooled wall 8 is arranged on the right side of the second- and third-channel partition wall water-cooled wall tube panel 4. The first- and second-channel partition wall water-cooled wall tube panel 9 and the left side of the second- and third-channel partition wall water-cooled wall tube panel 4 form a second flue 5, and the second- and third-channel partition wall water-cooled wall tube panel 4 and the rear wall water-cooled wall 8 form a third flue 6. Flue gas flows out of the furnace 15, first passes through the first flue 10, then turns to the second flue 5, and then turns to the third flue 6.

[0022] A side wall water-cooled wall header 2 is provided below the side wall water-cooled wall tube panel 3. An ash hopper 7 is provided below the side wall water-cooled wall header 2. The ash hopper 7 is located directly below the second flue 5 and the third flue 6. The ash hopper 7 collects and cleans dust in the flue gas to ensure long-term stable operation of the system.

[0023] The vertical spacing between the lower header 1 and the side wall water-cooled wall header 2 is 500mm-1500mm. Specifically, the vertical spacing between the lower header 1 and the side wall water-cooled wall header 2 is set to 1000mm. This height is the optimal spacing distance obtained by comprehensively considering the ash falling space and the area of ​​the heating surface, combined with the height of the tube screen and the heat exchange efficiency. It expands the width between the ash hopper 7 and the flue, reduces the ash accumulation in the second flue 5, and increases the service life of the equipment. In addition, the tube screen height is generally an integer, which is convenient for controlling accuracy and reducing errors.

[0024] Lower headers 1 are provided on the front and rear sides below the two- and three-channel partition wall water-cooled wall tube panels 4. The lower headers 1 are mirror-symmetrical and divided into two sections. The lower headers 1 are connected to the two- and three-channel partition wall water-cooled wall tube panels 4, making installation easy. Because the headers are too long to be easily turned within the steel frame, installation is inconvenient. The upper end of the lower header body 12 is provided with a row of pipe joints, and the two- and three-channel partition wall water-cooled wall tube panels 4 are connected to the lower header body 12 through the rows of pipe joints.

[0025] Working process: First, pass the lower header body 12 through the through-holes on the side wall water-cooled wall tube panel 3. Then, connect the second and third channel partition wall water-cooled wall tube panel 4 to the lower header body 12 through rows of pipe joints. The fixed connection is completed by on-site welding.

[0026] Then, the outer end 11 of the lower header and the lower header body 12 are coaxially aligned and welded to fix them. Then, the downpipe and the downpipe joint 112 are welded respectively, and the drain pipe joint 113 is welded to the drain pipe.

[0027] The above description of the disclosed embodiments enables one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be readily apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not limited to the embodiments shown herein, but is intended to conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A lower header device for a horizontal waste heat boiler for garbage incineration, characterized by: The lower header comprises a lower header outer end and a lower header body, the upper side of the lower header outer end is vertically connected to a downcomer pipe joint, the front side of the lower header outer end is horizontally connected to a drain pipe joint, the upper end of the lower header body is connected to a second- and third-channel partition wall water-cooled wall tube panel, side wall water-cooled wall tube panels are respectively provided at the front and rear ends of the second- and third-channel partition wall water-cooled wall tube panel, circular through holes are provided on the side wall water-cooled wall tube panel corresponding to the second- and third-channel partition wall water-cooled wall tube panel, and the inner diameter of the circular through hole is clearance-matched with the outer diameter of the lower header body.

2. The lower header device of a horizontal waste heat boiler for garbage incineration according to claim 1, characterized in that: A first- and second-channel partition wall water-cooled wall tube panel is arranged on the left side of the second- and third-channel partition wall water-cooled wall tube panel, and a rear wall water-cooled wall is arranged on the right side of the second- and third-channel partition wall water-cooled wall tube panel. The first- and second-channel partition wall water-cooled wall tube panel and the left side of the second- and third-channel partition wall water-cooled wall tube panel form a second flue, and the second- and third-channel partition wall water-cooled wall tube panel and the rear wall water-cooled wall form a third flue.

3. The lower header device of a horizontal waste heat boiler for garbage incineration according to claim 1, characterized in that: A side wall water-cooled wall header is provided below the side wall water-cooled wall tube panel, and an ash hopper is provided below the side wall water-cooled wall header. The ash hopper is located directly below the second flue and the third flue.

4. The lower header device of a horizontal waste heat boiler for garbage incineration according to claim 3, characterized in that: The vertical spacing between the lower header and the side wall water-cooled wall header is 500mm-1500mm.

5. The lower header device of a horizontal waste heat boiler for garbage incineration according to claim 1, characterized in that: Lower headers are respectively provided on the front and rear sides below the second and third channel partition water-cooled wall tube panels, and the lower headers are mirror-symmetrical.

6. The lower header device of a horizontal waste heat boiler for garbage incineration according to claim 1, characterized in that: The upper end of the lower header body is provided with rows of pipe joints, and the second and third channel partition water-cooled wall tube panels are connected to the lower header body through the rows of pipe joints.

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