Waste heat boiler with automatic ash removal function

Abstract

The utility model relates to the field of waste heat boilers, in particular to a waste heat boiler with an automatic ash removal function. The waste heat boiler comprises a boiler body, and heat exchange pipes are arranged in the boiler body in an array mode. The dry ice cleaning structure comprises a linear module extending in the length direction of the heat exchange pipes, a connecting cylinder installed on the linear module and located between the adjacent heat exchange pipes, a spray head installed on the connecting cylinder and a scraper installed on the connecting cylinder and arranged on one side of the spray head. A dry ice conveying pipe is arranged in the connecting cylinder, and the spray head faces the heat exchange pipe and is communicated with the dry ice conveying pipe; and an arc-shaped surface matched with the circumferential outer wall of the heat exchange tube is formed on the scraper. According to the waste heat boiler with the automatic ash removal function, the dry ice cleaning structure is arranged, dry ice is used for cleaning firstly, then the scraping plate is used for cleaning, and the ash removal effect of the heat exchange pipe is guaranteed; and meanwhile, the linear module drives the nozzle and the scraper to move, and the cleaning efficiency is high.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of waste heat boiler, concretely relates to a waste heat boiler with automatic dust cleaning function. BACKGROUND

[0002] Waste heat boiler, as its name implies, is a boiler that uses the heat in the exhaust gas, waste material or waste liquid in various industrial processes to heat water to a certain temperature. The oil-fired boiler, gas-fired boiler and coal-fired boiler with flue gas heat recovery are also called waste heat boilers. Waste heat boilers can produce hot water or steam through heat recovery to supply other sections.

[0003] During long-term use, the inner wall of the waste heat boiler will be covered with a large amount of dust, which needs to be cleaned regularly. However, the existing cleaning method is generally to clean the heat exchange tube by manually holding the cleaning device, and the cleaning effect depends on manual control, which is difficult to ensure the cleaning quality and has low efficiency.

[0004] Therefore, there is a need in the art for a new technical solution to solve the above problems. SUMMARY

[0005] In order to improve or solve the technical problems of manual cleaning of heat exchange tubes in the prior art, the cleaning quality is difficult to guarantee, and the cleaning efficiency is low, the utility model provides a waste heat boiler with automatic dust cleaning function. The waste heat boiler comprises: a furnace body, heat exchange pipes are arranged in the furnace body; a dry ice cleaning structure, comprising a linear module extending along the length direction of the heat exchange pipe, a connecting cylinder installed on the linear module and located between adjacent heat exchange pipes, a spray head installed on the connecting cylinder, and a scraper installed on the connecting cylinder and arranged on one side of the spray head; a dry ice conveying pipe is arranged in the connecting cylinder, the spray head faces the heat exchange pipe and communicates with the dry ice conveying pipe; the scraper is formed with an arc surface matched with the circumferential outer wall of the heat exchange pipe.

[0006] The utility model relates to a kind of waste heat boiler with automatic dust cleaning function, including furnace body, heat exchange pipe and dry ice cleaning structure. Among them, furnace body is used to flue gas and water heat exchange, heat exchange pipe is used to transport water.Dry ice cleaning structure includes linear module, connecting cylinder, spray head and scraper.Straight module extends along the length direction of heat exchange pipe, is used to drive connecting cylinder, spray head and scraper move along the length direction of heat exchange pipe.Connecting cylinder is arranged with dry ice delivery pipe, and spray head is communicated with dry ice delivery pipe, for the cleaning of flue dust adhered on heat exchange pipe.Scraper is installed on connecting cylinder, and form the arc surface matched with the circumferential outer wall of heat exchange pipe, for moving with connecting cylinder to scrape the flue dust remaining on heat exchange pipe.By the above-mentioned setting, the utility model relates to a kind of waste heat boiler with automatic dust cleaning function sets dry ice cleaning structure, first using dry ice cleaning, then using scraper to clean, guarantee the dust cleaning effect of heat exchange pipe;While using linear module to drive spray head and scraper to move, cleaning efficiency is high.

[0007] Further, the connecting cylinder is arranged side by side with multiple; the linear module is provided with two groups along the arrangement direction of the connecting cylinder, and a traction column is arranged between the two groups of linear modules and is fixedly connected with the connecting cylinder.

[0008] Further, each group of linear modules is provided with two, and the two linear modules are arranged opposite in the up-down direction.

[0009] Further, the scraper includes first scraper and second scraper respectively towards adjacent two heat exchange pipes, and the first scraper is matched with the second scraper on the adjacent connecting cylinder and is sleeved on the circumferential outside of the heat exchange pipe.

[0010] Further, the scraper is provided with multiple along the length direction of the connecting cylinder, and the multiple scrapers are arranged in steps in the up-down direction.

[0011] Further, a mounting column is arranged between the scraper and the connecting cylinder.

[0012] Further, it further includes a fixed rod fixedly connected with multiple connecting cylinders.

[0013] Further, it further includes dust collecting structure mounted in the furnace body, and the dust collecting structure includes a push plate abutting against the bottom wall of the furnace body and a hydraulic cylinder driving the push plate to move along the length direction of heat exchange pipe.

[0014] In conclusion, compared with prior art, the utility model has the following beneficial effects:

[0015] (1) set dry ice cleaning structure, first using dry ice cleaning, then using scraper to clean, guarantee the dust cleaning effect of heat exchange pipe;While using linear module to drive spray head and scraper to move, cleaning efficiency is high;

[0016] (2) By setting the dust collection structure, the hydraulic oil cylinder pushes the push plate to move, the push plate abuts against the bottom wall of the furnace body, so that the accumulation of the falling in the furnace body bottom is accumulated in one place, facilitating subsequent manual cleaning. BRIEF DESCRIPTION OF DRAWINGS

[0017] The preferred embodiments of the present application will be described below with reference to the accompanying drawings, in which:

[0018] Figure 1 is a schematic view of an embodiment of the waste heat boiler with automatic ash removal function of the present application;

[0019] Figure 2 is another schematic view of an embodiment of the waste heat boiler with automatic ash removal function of the present application.

[0020] LIST OF REFERENCE NUMERALS: 1, furnace body; 2, heat exchange pipe; 3, dry ice cleaning structure; 31, linear module; 32, connecting cylinder; 33, spray head; 34, first scraper; 35, second scraper; 36, fixed rod; 37, traction column; 38, mounting column; 4, dust collection structure; 41, push plate; 42, hydraulic oil cylinder. DETAILED DESCRIPTION

[0021] The preferred embodiments of the present application will be described below with reference to the accompanying drawings. Those skilled in the art should understand that these embodiments are only used to explain the technical principles of the present application, and are not intended to limit the protection scope of the present application.

[0022] It should be noted that in the description of the present application, the terms "upper", "lower", "left", "right", "inner", "outer" and the like indicate the direction or positional relationship of the terms based on the direction or positional relationship shown in the drawings, which is only for the convenience of description, and does not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation, therefore it cannot be understood as a limitation on the present application. In addition, the terms "first", "second" are only for descriptive purposes, and cannot be understood as indicating or implying relative importance.

[0023] In addition, it should also be noted that in the description of the present application, unless otherwise explicitly specified and limited, the terms "mounting", "setting", "connecting" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be directly connected, or indirectly connected through an intermediate medium, or it can be the communication between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0024] In order to improve or solve the technical problems of artificial cleaning heat exchange tube in the prior art, the cleaning quality is difficult to guarantee, and the cleaning efficiency is low, the utility model provides a kind of waste heat boiler with automatic dust cleaning function.The waste heat boiler includes: furnace body 1, is arranged with heat exchange tube 2 in furnace body 1 in array;Dry ice cleaning structure 3, including linear module 31 extending along the length direction of heat exchange tube 2, connecting cylinder 32 being installed on linear module 31 and being located between adjacent heat exchange tube 2, spray head 33 being installed on connecting cylinder 32, and scraper being installed on connecting cylinder 32 and being arranged in the side of spray head 33;Dry ice delivery pipe is arranged in connecting cylinder 32, and spray head 33 is towards heat exchange tube 2 and is communicated with dry ice delivery pipe;Arc surface is formed on the scraper with the circumferential outer wall of heat exchange tube 2.

[0025] Figure 1 It is the schematic diagram of the embodiment of the waste heat boiler with automatic dust cleaning function of the utility model, Figure 2 It is another schematic diagram of the embodiment of the waste heat boiler with automatic dust cleaning function of the utility model.As Figure 1 And Figure 2 The waste heat boiler with automatic dust cleaning function of the utility model includes: furnace body 1, heat exchange tube 2, dry ice cleaning structure 3 and dust collection structure 4.

[0026] Continue to refer to Figure 1 And Figure 2 In one or more embodiments, furnace body 1 is generally rectangular box shape.In the position of furnace body 1 close to bottom wall, air inlet is provided, and exhaust port is provided on the top wall of furnace body 1, flue gas is transported to furnace body 1 from air inlet, and is discharged from exhaust port.Further, heat exchange tube 2 is arranged in array.Specifically, mounting plate is provided on the side wall of furnace body 1, and two mounting plates are oppositely provided.Two ends of heat exchange tube 2 are respectively installed on two mounting plates, and are connected with external water source through mounting plate.Exemplarily, heat exchange tube 2 is provided with twelve rows along the up-down direction, and is provided with eight rows along the left-right direction.

[0027] Continue to refer to Figure 1 And Figure 2 In one or more embodiments, dry ice cleaning structure 3 includes linear module 31 extending along the length direction of heat exchange tube 2, connecting cylinder 32 being installed on linear module 31, spray head 33 being installed on connecting cylinder 32, and scraper being installed on connecting cylinder 32.Based on Figure 2The connecting tubes 32 extend in the up-down direction and are arranged side by side in the left-right direction. The connecting tubes 32 are arranged between two adjacent rows of the heat exchange tubes 2. Further, the connecting tubes 32 are connected with fixing rods 36 which extend in the left-right direction and are connected with all the connecting tubes 32 to enhance the stability between the connecting tubes 32. Further, the linear modules 31 are arranged in two groups in the left-right direction, and a traction column 37 is arranged between the two groups of the linear modules 31. The connecting tubes 32 are arranged on the traction column 37 at intervals and uniformly. Further, each group of the linear modules 31 is arranged in two, and the two linear modules 31 are arranged opposite in the up-down direction. Correspondingly, the traction column 37 is arranged in two, and the two ends of the connecting tube 32 are fixed on the two traction columns 37 respectively to ensure the stability of the connecting tube 32 when moving.

[0028] With reference to the drawings further, Figure 1 and Figure 2 In one or more embodiments, dry ice conveying pipes are arranged in the connecting tubes 32, one end of the dry ice conveying pipes is connected with the spray heads 33, and the other end is connected with a dry ice storage tank. The dry ice conveying pipes are connected with air pumps, and the dry ice is conveyed to the spray heads 33 by the air pumps. Specifically, two rows of the spray heads 33 are arranged on each connecting tube 32, and the two rows of the spray heads 33 face the two rows of the heat exchange tubes 2 respectively. One spray head 33 corresponds to one heat exchange tube 2 and is used for cleaning the heat exchange tube 2. Exemplarily, the dry ice conveying pipes can be suspended at the middle position of the furnace body 1 to move with the connecting tubes 32.

[0029] With reference to the drawings further, Figure 1 and Figure 2In one or more embodiments, a plurality of scrapers are arranged on each connecting cylinder 32 and extend along the length direction of the connecting cylinder 32. Specifically, one scraper corresponds to one heat exchange pipe 2. The interval between adjacent scrapers is the same as the interval between adjacent heat exchange pipes 2. Further, the scrapers are generally arc-shaped, one side of which is fixedly connected to the connecting cylinder 32, and the other side thereof faces the heat exchange pipe 2 and is formed with an arc surface matched with the circumferential outer wall of the heat exchange pipe 2. Specifically, the scrapers include a first scraper 34 and a second scraper 35 which face two adjacent heat exchange pipes 2, respectively. The arc surface of the first scraper 34 faces the left side, and the arc surface of the second scraper 35 faces the right side. The first scraper 34 on the connecting cylinder 32 cooperates with the second scraper 35 on the adjacent connecting cylinder 32 and is sleeved on the circumferential outer side of the heat exchange pipe 2, so as to clean the heat exchange pipe 2 when moving; correspondingly, the second scraper 35 on the connecting cylinder 32 cooperates with the first scraper 34 on the adjacent connecting cylinder 32 and is sleeved on the circumferential outer side of the heat exchange pipe 2. Further, the first scraper 34 and the second scraper 35 are integrally formed. Further, a side cylinder is arranged on the left and right sides of the array of heat exchange pipes 2, and the side cylinder includes a left side cylinder and a right side cylinder. The left side cylinder is provided with only the second scraper 35, and the right side cylinder is provided with only the first scraper 34. Further, the scrapers on the same connecting cylinder 32 are arranged in a stepped manner in the up-down direction, so as to prevent the dust on the upper row of heat exchange pipes 2 from remaining on the lower row of heat exchange pipes 2. That is, the distance between the scrapers and the connecting cylinder 32 is greater downward. Specifically, a mounting column 38 is arranged between the scrapers and the connecting cylinder 32, and the length of the mounting column 38 is longer downward. The mounting column 38 is formed with an arc surface and is attached to the connecting cylinder 32. The mounting column 38 is fixedly connected to the first scraper 34 and the second scraper 35.

[0030] Continuing to refer to Figure 1 and Figure 2 The dust collecting structure 4 is installed in the furnace body 1 and is located at the bottom of the furnace body 1. In one or more embodiments, the dust collecting structure 4 includes a push plate 41 abutting against the bottom wall of the furnace body 1 and a hydraulic oil cylinder 42 driving the push plate 41 to move. Specifically, the hydraulic oil cylinder 42 extends along the length direction of the heat exchange pipe 2 and is installed in a mounting cavity in the furnace body 1. The lower side of the scraper abuts against the bottom wall of the furnace body 1 and pushes the dust and impurities on the bottom wall to one side under the driving of the hydraulic oil cylinder 42, so as to facilitate subsequent manual cleaning.

[0031] The working principle of the utility model is as follows:

[0032] When the heat exchange pipe 2 needs to be cleaned, the linear module 31 is actuated to drive the connecting cylinder 32 to move along the length direction of the heat exchange pipe 2, and the spray head 33 moves with the heat exchange pipe 2 to spray dry ice on the heat exchange pipe 2 to clean the dust and impurities on the heat exchange pipe 2; the scraper is arranged below the spray head 33 to further scrape the dust remaining on the heat exchange pipe 2 to ensure the dust cleaning effect of the heat exchange pipe 2.

[0033] Thus, the technical scheme of the utility model has been described in combination with the preferred embodiments shown in the drawings, but it is easy for those skilled in the art to understand that the protection scope of the utility model is obviously not limited to these specific embodiments. Those skilled in the art can make equivalent changes or replacements to the related technical features without departing from the principles of the utility model, and the technical cases after these changes or replacements will all fall within the protection scope of the utility model.

Claims

1. A waste heat boiler with automatic ash removal function, characterized in that, The utility model relates to a heat exchange tube cleaning device for a heat exchange tube array, which comprises: a furnace body (1) in which heat exchange tubes (2) are arranged in an array; a dry ice cleaning structure (3) comprising linear modules (31) extending along the length direction of the heat exchange tubes (2), connecting cylinders (32) mounted on the linear modules (31) and located between adjacent heat exchange tubes (2), spray heads (33) mounted on the connecting cylinders (32), and scrapers arranged on the connecting cylinders (32) and located on the side of the spray heads (33); a dry ice conveying pipe is arranged in the connecting cylinder (32), the spray head (33) faces the heat exchange tube (2) and communicates with the dry ice conveying pipe; the scraper is formed with an arc surface matched with the circumferential outer wall of the heat exchange tube (2).

2. The waste heat boiler with automatic ash cleaning function according to claim 1, characterized in that, The connecting cylinders (32) are arranged side by side; the linear modules (31) are provided with two groups in the arrangement direction of the connecting cylinders (32), and a traction column (37) connecting the two groups and fixedly connected with the connecting cylinders (32) is arranged between the two groups of linear modules (31).

3. The waste heat boiler with automatic ash cleaning function according to claim 2, characterized in that, Each group of linear modules (31) is provided with two, and the two linear modules (31) are oppositely arranged in the up-down direction.

4. The waste heat boiler with automatic ash cleaning function according to claim 2, characterized in that, The scraper comprises a first scraper (34) and a second scraper (35) facing two adjacent heat exchange tubes (2) respectively, the first scraper (34) is sleeved on the circumferential outer side of the heat exchange tube (2) in cooperation with the second scraper (35) on the adjacent connecting cylinder (32).

5. The waste heat boiler with automatic ash cleaning function according to claim 2, characterized in that, The scraper is provided with a plurality of scrapers along the length direction of the connecting cylinder (32), and the plurality of scrapers are arranged in steps in the up-down direction.

6. The waste heat boiler with automatic ash cleaning function according to claim 5, characterized in that, A mounting column (38) is arranged between the scraper and the connecting cylinder (32).

7. The waste heat boiler with automatic ash cleaning function according to claim 1, characterized in that, Further comprising a fixed rod (36) fixedly connected with a plurality of connecting cylinders (32).

8. The waste heat boiler with automatic ash cleaning function according to claim 1, characterized in that, Further comprising a dust collecting structure (4) mounted in the furnace body (1), the dust collecting structure (4) comprises a push plate (41) abutting against the bottom wall of the furnace body (1), and a hydraulic oil cylinder (42) driving the push plate (41) to move along the length direction of the heat exchange tube (2).

Images