A waste heat boiler with increased heat exchange area

Abstract

The application provides a waste heat boiler with increased heat exchange area, and relates to the technical field of boilers.The waste heat boiler comprises a boiler body, a first heat exchange pipe and a plurality of partitions.The plurality of partitions are arranged in the boiler body in a staggered manner, and the partitions and the boiler body combine to form a serpentine channel.The first heat exchange pipe is arranged in a serpentine shape, and the two ends of the first heat exchange pipe extend out of the two ends of the serpentine channel, respectively.A plurality of heat exchange fins are fixedly arranged on the first heat exchange pipe.The boiler can prolong the flow time of flue gas in the boiler body by arranging the serpentine channel, prolong the contact time of flue gas and the first heat exchange pipe by arranging the first heat exchange pipe with the same trend as the serpentine channel and arranging a plurality of heat exchange fins on the first heat exchange pipe, effectively increase the heat exchange area of flue gas and water, improve the heat exchange efficiency, and reduce heat waste.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of boiler, in particular to a waste heat boiler with increased heat exchange area. BACKGROUND

[0002] The waste heat boiler refers to a boiler that uses the waste heat in the waste gas, waste material or waste liquid in various industrial processes and the heat generated after the combustion of combustible substances to heat water to a certain working medium. The waste heat boiler can produce hot water or steam through waste heat recovery to supply other sections. The existing waste heat boiler has a relatively small heat exchange area between the internal flue gas and the boiler water during operation, which leads to low heating efficiency of the water. Due to the limited contact area between the flue gas and the water, the flue gas is discharged after heat exchange with the water in a very short time, resulting in a large amount of heat waste. SUMMARY

[0003] The purpose of the present application is to provide a waste heat boiler with increased heat exchange area, which can solve the technical problem that the existing waste heat boiler has a relatively small heat exchange area between the internal flue gas and the boiler water during operation, which leads to low heating efficiency of the water. Due to the limited contact area between the flue gas and the water, the flue gas is discharged after heat exchange with the water in a very short time, resulting in a large amount of heat waste.

[0004] The present application provides a waste heat boiler with increased heat exchange area, which comprises a boiler body, a first heat exchange pipe and a plurality of partitions. The partitions are arranged in the boiler body in a staggered manner, and the partitions and the boiler body form a serpentine channel. The first heat exchange pipe is arranged in the serpentine channel in a serpentine shape, and the two ends of the first heat exchange pipe extend out of the two ends of the serpentine channel. A plurality of heat exchange fins are fixedly arranged on the first heat exchange pipe. An air inlet pipe and an air outlet pipe are arranged on the boiler body and are in communication with the two ends of the serpentine channel.

[0005] The water inlet pipe and the water outlet pipe are also included, and the two ends of the first heat exchange pipe are connected to the water inlet pipe and the water outlet pipe, respectively.

[0006] The second heat exchange pipe is also included, which is embedded on the inner wall of the boiler body and the partitions, and the two ends of the second heat exchange pipe are connected to the water inlet pipe and the water outlet pipe, respectively.

[0007] The heat exchange fins are inclined towards the direction of flue gas flow.

[0008] The air outlet pipe is provided with a filter box, and the filter box is provided with a filter screen.

[0009] The filter box is provided with a cleaning brush, a sliding groove is formed in the filter box, the cleaning brush is in limited sliding connection with the sliding groove, the cleaning brush is attached to the air inlet end of the filter screen, a screw rod is threaded through the filter box, the screw rod is in rotary connection with the cleaning brush through a bearing, and a dust discharge pipe is in communication with the bottom of the filter box and is provided with a valve.

[0010] The end of the screw rod away from the cleaning brush is provided with a handle.

[0011] The lower end of the boiler body is provided with a supporting leg.

[0012] The boiler body is provided with a supporting leg.

[0013] The boiler body is provided with a supporting leg. BRIEF DESCRIPTION OF DRAWINGS

[0014] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiments, and it should be understood that the following drawings only show some embodiments of the present application, and therefore should not be regarded as a limitation to the scope, and for those skilled in the art, other related drawings can also be obtained without creative labor on the basis of these drawings.

[0015] Figure 1 The cross-sectional view of the overall front view structure in some embodiments of the present application;

[0016] Figure 2 The schematic diagram of the overall front view structure in some embodiments of the present application;

[0017] Figure 3 The schematic diagram of the partition plate and the second heat exchange tube side view structure in some embodiments of the present application;

[0018] Figure 4 The cross-sectional view of the first heat exchange tube in some embodiments of the present application;

[0019] Figure 5 The cross-sectional view of the filter box main view structure in some embodiments of the present application.

[0020] The reference signs are respectively:

[0021] 1. boiler body; 11. air inlet pipe; 12. air outlet pipe; 13. supporting leg;

[0022] 2. first heat exchange pipe; 21. heat exchange fin;

[0023] 3. partition plate;

[0024] 4. serpentine channel;

[0025] 5. water inlet pipe;

[0026] 6. water outlet pipe;

[0027] 7. second heat exchange pipe;

[0028] 8. filter box; 81. filter screen; 82. cleaning brush; 83. sliding slot; 84. screw rod; 85. ash discharge pipe; 86. valve; 87. handle. DETAILED DESCRIPTION

[0029] In order to make the purpose, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, rather than all the embodiments of the present application. The components of the embodiments of the present application described and shown in the drawings can be arranged and designed in various different configurations.

[0030] Therefore, the detailed description of the embodiments of the present application provided below in the drawings is not intended to limit the scope of the claimed present application, but only represents selected embodiments of the present application. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present application without making creative efforts fall within the scope of protection of the present application.

[0031] It should be noted that: similar reference numerals and letters represent similar items in the following drawings, therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0032] In the description of the present application, it should be noted that the terms “center”, “upper”, “lower”, “left”, “right”, “vertical”, “horizontal”, “inner”, “outer” and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship when the product of the present application is usually placed, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. In addition, the terms “first”, “second”, “third” and the like are only used for differentiation in description, and cannot be understood as indicating or implying relative importance.

[0033] Furthermore, the terms "horizontal", "vertical", "overhang", and the like, do not mean that the components must be absolutely horizontal or overhanging, but can be slightly inclined. For example, "horizontal" only means that it is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly inclined.

[0034] In the description of the present application, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set", "install", "connect", "connect" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the communication inside 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.

[0035] As shown in Figure 1 , 2 and 4, the present application provides a waste heat boiler with increased heat exchange area, which comprises a boiler body 1, a first heat exchange pipe 2 and a plurality of partitions 3, the plurality of partitions 3 are arranged in the boiler body 1 in turn and staggered, and the partition 3 and the boiler body 1 combine to form a serpentine channel 4, the first heat exchange pipe 2 is arranged in a serpentine shape, the first heat exchange pipe 2 is arranged in the serpentine channel 4, and the two ends of the first heat exchange pipe 2 extend out of the two ends of the serpentine channel 4 respectively, a plurality of heat exchange fins 21 are fixedly arranged on the first heat exchange pipe 2, and an air inlet pipe 11 and an air outlet pipe 12 are arranged in communication on the boiler body 1, and the air inlet pipe 11 and the air outlet pipe 12 are communicated with the two ends of the serpentine channel 4 respectively.

[0036] In use, the waste heat flue gas is introduced into the boiler body 1 from the air inlet pipe 11, and the flue gas exchanges heat with the water in the first heat exchange pipe 2 when flowing through the serpentine channel 4, and the flue gas is finally discharged from the air outlet pipe 12; the boiler can prolong the flow time of the flue gas in the boiler body 1 by arranging the serpentine channel 4, and can prolong the contact time of the flue gas with the first heat exchange pipe 2, and effectively increase the heat exchange area of the flue gas and the water, improve the heat exchange efficiency, and reduce the waste of heat.

[0037] As shown in Figure 1 and 2 In the present embodiment, it also includes a water inlet pipe 5 and a water outlet pipe 6, and the two ends of the first heat exchange pipe 2 are connected with the water inlet pipe 5 and the water outlet pipe 6 respectively; in use, water flows into the first heat exchange pipe 2 from the water inlet pipe 5, and the heated water is discharged from the water outlet pipe 6.

[0038] As shown in Figures 1 to 3As shown, in the embodiment, a second heat exchange pipe 7 is embedded on the inner wall of the boiler body 1 and the partition plate 3, and the two ends of the second heat exchange pipe 7 are connected with the water inlet pipe 5 and the water outlet pipe 6 respectively.

[0039] In use, water flows into the second heat exchange pipe 7 from the water inlet pipe 5, and the flue gas flowing through the serpentine passage 4 exchanges heat with the water in the second heat exchange pipe 7, and the heated water is discharged from the water outlet pipe 6; the flue gas flowing through the serpentine passage 4 will transfer part of the heat to the inner wall of the boiler body 1 and the partition plate 3, and by arranging the second heat exchange pipe 7, the heat exchange area of the flue gas and the water can be further increased, and the flue gas waste heat recovery rate can be improved.

[0040] As shown in Figure 1 and 4 , in the embodiment, the heat exchange fins 21 are inclined towards the flue gas flow direction; the inclined heat exchange fins 21 help to guide the flue gas to flow more smoothly through the serpentine passage 4, reducing the resistance in the flue gas flow process.

[0041] As shown in Figure 1 and 5 , in the embodiment, a filter box 8 is arranged on the air outlet pipe 12, and a filter screen 81 is arranged in the filter box 8; in use, the flue gas flowing through the air outlet pipe 12 enters the filter box 8, and the filter screen 81 filters and retains the solid particles in the flue gas; by arranging the filter screen 81, the solid particles in the flue gas can be effectively filtered out, the flue gas can be purified, and environmental pollution can be reduced.

[0042] As shown in Figure 1 and 5 , in the embodiment, a cleaning brush 82 is arranged in the filter box 8, a sliding groove 83 is formed in the filter box 8, the cleaning brush 82 is limitingly and slidingly connected with the sliding groove 83, the cleaning brush 82 is in abutment with the air inlet end of the filter screen 81, a screw rod 84 is threadedly penetrated through the filter box 8, the screw rod 84 is rotatably connected with the cleaning brush 82 through a bearing, a dust discharge pipe 85 is communicatively arranged at the bottom of the filter box 8, and a valve 86 is arranged on the dust discharge pipe 85.

[0043] The operator can regularly clean the filter screen 81 to prevent blockage, and the specific operation is to rotate the screw rod 84 to drive the cleaning brush 82 to move up and down, the cleaning brush 82 brushes and cleans the filter screen 81 when moving, and the dust and impurities cleaned can be discharged from the dust discharge pipe 85 by opening the valve 86; the cooperation of the cleaning brush 82 and the sliding groove 83 plays a guiding and limiting role on the cleaning brush 82.

[0044] As shown in Figure 1 and 5 , in the embodiment, a handle 87 is arranged at the end of the screw rod 84 away from the cleaning brush 82; the handle 87 facilitates the operator to rotate the screw rod 84, improving the use convenience.

[0045] AsFigure 1 As shown in the drawings, in the embodiment, the lower end of the boiler body 1 is provided with a supporting leg 13; the supporting leg 13 supports and fixes the boiler body 1, and improves the use stability.

[0046] Working principle: the waste heat boiler with increased heat exchange area provided by the application, when in use, water flows into the first heat exchange pipe 2 and the second heat exchange pipe 7 from the water inlet pipe 5, and waste heat flue gas is introduced into the boiler body 1 from the air inlet pipe 11, the flue gas flows through the serpentine passage 4 and exchanges heat with the water in the first heat exchange pipe 2 and the second heat exchange pipe 7, and finally the flue gas is discharged from the air outlet pipe 12, and the heated water is discharged from the water outlet pipe 6; when the flue gas flows through the air outlet pipe 12, it enters the filter box 8, the filter screen 81 filters and retains the solid particles in the flue gas, the operator can clean the filter screen 81 regularly to prevent blockage, and the specific operation is that rotating the handle 87 drives the screw rod 84 to rotate, the screw rod 84 drives the cleaning brush 82 to move up and down, the cleaning brush 82 moves to brush and clean the filter screen 81, and opening the valve 86 can discharge the dust and impurities cleaned from the dust discharge pipe 85.

[0047] The above is only the preferred embodiment of the application and is not used to limit the application, and the application can have various changes and variations for those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the application shall be included in the protection scope of the application.

Claims

1. A waste heat boiler having an increased heat exchange area, characterized in that: The boiler body includes a boiler body (1), a first heat exchange tube (2), an inlet pipe (5), an outlet pipe (6), and multiple baffles (3). The multiple baffles (3) are arranged alternately inside the boiler body (1), and the baffles (3) and the boiler body (1) are combined to form a serpentine channel (4). The first heat exchange tube (2) is arranged in a serpentine shape and is located inside the serpentine channel (4). The two ends of the first heat exchange tube (2) extend out of the two ends of the serpentine channel (4). The two ends of the first heat exchange tube (2) are connected to the inlet pipe (5) and the outlet pipe (6) respectively. Multiple heat exchange fins (21) are fixedly arranged on the first heat exchange tube (2). An air inlet pipe (11) and an air outlet pipe (12) are connected to the boiler body (1). The air inlet pipe (11) and the air outlet pipe (12) are connected to the two ends of the serpentine channel (4) respectively.

2. The waste heat boiler of claim 1, wherein: It also includes a second heat exchange tube (7), which is embedded in the inner wall of the boiler body (1) and the partition plate (3), and the two ends of the second heat exchange tube (7) are respectively connected to the water inlet pipe (5) and the water outlet pipe (6).

3. The waste heat boiler of claim 1, wherein: The heat exchange fins (21) are inclined toward the direction of flue gas flow.

4. The waste heat boiler of claim 1, wherein: A filter box (8) is provided on the air outlet pipe (12), and a filter screen (81) is provided inside the filter box (8).

5. The waste heat boiler of claim 4, wherein: The filter box (8) is equipped with a cleaning brush (82) and a sliding groove (83) is provided inside the filter box (8). The cleaning brush (82) is slidably connected to the sliding groove (83) and the cleaning brush (82) is in contact with the air inlet end of the filter screen (81). A screw (84) is threaded through the filter box (8). The screw (84) is rotatably connected to the cleaning brush (82) through a bearing. A ash discharge pipe (85) is provided at the bottom of the filter box (8). A valve (86) is provided on the ash discharge pipe (85).

6. The waste heat boiler with increased heat exchange area according to claim 5, characterized in that: A handle (87) is provided at the end of the screw (84) away from the cleaning brush (82).

7. The waste heat boiler with increased heat exchange area according to claim 1, characterized in that: The lower end of the boiler body (1) is provided with a support leg (13).

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