Waste heat recovery mechanism of straw boiler with oven

Abstract

The utility model relates to the technical field of straw boilers, in particular to a waste heat recovery mechanism of a straw boiler with an oven. The device comprises a boiler body, an oven fixedly connected to the boiler body and smoke exhaust pipes communicated with the boiler body, the smoke exhaust pipes comprise the first smoke exhaust pipe with the head end communicated with the boiler body and the second smoke exhaust pipe with the head end communicated with the tail end of the first smoke exhaust pipe, the first smoke exhaust pipe is fixedly connected to the outer side wall of the oven, and the second smoke exhaust pipe is fixedly connected to the outer side wall of the oven. The second smoke exhaust pipe is fixedly connected to the inner boiler wall of the boiler body, and the tail end of the second smoke exhaust pipe penetrates through the boiler wall of the boiler body. According to the device, waste gas can be repeatedly utilized, after heat of the waste gas generated after straw combustion is absorbed by the oven, the cooled waste gas passes through the combustion chamber to cool the boiler wall at the combustion chamber, passes through the boiler body, the waste gas is heated again, the waste gas flows through the oven to provide heat for the oven, and the waste gas is repeatedly utilized to supply heat to the oven; and the service life of the boiler is prolonged while resources are saved.

Description

TECHNICAL FIELD

[0001] The utility model relates to a straw boiler technical field, concretely is a kind of straw boiler's waste heat recovery mechanism of oven. BACKGROUND

[0002] Straw boiler is a kind of new environmental protection boiler with crop straw as fuel. Its working principle is to burn straw in the boiler, and the heat released is used to heat water or produce steam, which is then used for heating or power supply. The core part of straw boiler is the combustion chamber. When working, straw is sent into the combustion chamber for high-temperature combustion, and the exhaust gas generated by straw combustion is then discharged through the chimney. However, the exhaust gas is directly discharged, which also carries away a large amount of heat energy. The traditional straw boiler cannot recover the heat in the exhaust gas, resulting in waste of resources.

[0003] Chinese patent 201220340281.1 discloses "energy-saving boiler with oven", publication number CN 202813747U. The device includes a door, a grate disc, a water inlet pipe, a water outlet pipe and a chimney. The water jacket at the back of the furnace body is connected to the oven water jacket. The upper part of the two water jackets is provided with a smoke return port. The oven is arranged in the oven water jacket. A plurality of smoke holes are provided on the bottom plate of the oven water jacket, and the smoke holes are connected to the chimney. However, the device has some defects: when straw is burned, the furnace wall of the boiler bears high temperature, so the service life of the furnace wall at the combustion chamber of the boiler is short. UTILITY MODEL CONTENT

[0004] To solve the above problems of the prior art, the utility model provides a waste heat recovery mechanism of straw boiler with oven, which can utilize exhaust gas multiple times. After the exhaust gas after straw combustion absorbs heat in the oven, the cooled exhaust gas passes through the combustion chamber to cool the furnace wall at the combustion chamber, thereby improving the service life of the boiler.

[0005] To achieve the above purpose, the utility model provides the following technical scheme: a waste heat recovery mechanism of straw boiler with oven, comprising a boiler main body, an oven fixedly connected to the boiler main body, and an exhaust pipe communicating with the boiler main body. The exhaust pipe includes a first exhaust pipe with a first end communicating with the boiler main body, and a second exhaust pipe with a first end communicating with the tail end of the first exhaust pipe. The first exhaust pipe is fixedly connected to the outer side wall of the oven. The second exhaust pipe is fixedly connected to the inner furnace wall of the boiler main body. The tail end of the second exhaust pipe penetrates the furnace wall of the boiler main body.

[0006] With the above structure design, high-temperature exhaust gas first passes through the first exhaust pipe to provide heat for the oven. The cooled exhaust gas then flows through the combustion chamber of the boiler main body to cool the furnace wall at the combustion chamber, thereby improving the service life of the boiler.

[0007] Preferably, the tail end of the second flue pipe is communicated with the head end of a third flue pipe, the third flue pipe is fixedly connected to the outer side wall of the oven, and the tail end of the third flue pipe is communicated with the waste gas pipe.

[0008] With the above structure, after passing through the boiler main body, the waste gas is heated again, and then flows through the oven, thereby providing heat for the oven, fully utilizing the heat in the waste gas, and saving resources.

[0009] Preferably, the first flue pipe, the second flue pipe and the third flue pipe are all tubular structures which are bent upwards and downwards, and the pipe openings of the first flue pipe, the second flue pipe and the third flue pipe are all square.

[0010] With the above structure, the contact area of the first flue pipe, the third flue pipe and the oven can be increased, the contact area of the second flue pipe and the boiler main body can be increased, the total length of the waste gas flow can be increased, and the heat in the waste gas can be fully released.

[0011] Preferably, the tail end of the first flue pipe is inserted into the head end of the second flue pipe, the head end of the third flue pipe is inserted into the tail end of the second flue pipe, and the tail end of the first flue pipe and the head end of the third flue pipe are both fixedly connected to an insertion pipe which has a diameter matching the diameter of the pipe opening of the second flue pipe.

[0012] With the above structure, the first flue pipe, the second flue pipe and the third flue pipe can be conveniently connected.

[0013] Preferably, a heat preservation plate is arranged outside the oven, the heat preservation plate is fixedly connected to the oven by bolts, and the first flue pipe and the third flue pipe are arranged between the heat preservation plate and the oven.

[0014] With the above structure, the oven can be heat preserved, and the temperature of the oven can be conveniently maintained.

[0015] Compared with the prior art, the device has the following beneficial effects:

[0016] 1) The device can utilize the waste gas multiple times, the waste gas after the combustion of the straw is absorbed by the oven to reduce the temperature, and then the waste gas after the temperature reduction passes through the combustion chamber to reduce the temperature of the furnace wall of the combustion chamber, and then the waste gas is heated again after passing through the boiler main body, and then the waste gas flows through the oven to provide heat for the oven, thereby repeatedly utilizing the waste gas to provide heat for the oven, saving resources and prolonging the service life of the boiler.

[0017] 2) The heat preservation plate and the first flue pipe and the third flue pipe can be detached from the oven, and the parts can be conveniently maintained and replaced by the staff. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 The figure is a structural schematic view of the device;

[0019] Figure 2 It is the internal structure schematic view of the utility model;

[0020] Figure 3 It is the structure schematic view that second smoke pipe of the utility model communicates with boiler main body;

[0021] Figure 4 It is the structure schematic view of first smoke pipe, second smoke pipe, third smoke pipe of the utility model; Specific implementation

[0022] Please refer to Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 The utility model provides a kind of technical scheme: a kind of straw boiler's waste heat recovery mechanism with oven, including boiler main body 1, oven 2 of fixed connection on boiler main body 1, the smoke pipe 3 of communication boiler main body 1, the smoke pipe 3 includes first smoke pipe 31 of first end communication boiler main body 1, first end and the second smoke pipe 32 of tail end communication of first smoke pipe 31, first smoke pipe 31 and the smoke outlet of communication of boiler main body 1, first smoke pipe 31 is fixedly connected on the outer side wall of oven 2, second smoke pipe 32 is fixedly connected on the inner furnace wall of boiler main body 1, the tail end of second smoke pipe 32 penetrates the furnace wall of boiler main body 1.

[0023] The tail end of second smoke pipe 32 communicates the first end of third smoke pipe 33, third smoke pipe 33 is fixedly connected on the outer side wall of oven 2, the tail end of third smoke pipe 33 communicates waste gas pipe 34.

[0024] In the embodiment, oven 2 is fixedly connected on the upper surface of boiler main body 1, second smoke pipe 32 is fixedly connected on the inner furnace wall at combustion chamber of boiler main body 1, third smoke pipe 33 is fixedly connected on the upper surface of oven 2, first smoke pipe 31 is fixedly connected on the side wall of oven 2.

[0025] First smoke pipe 31, second smoke pipe 32, third smoke pipe 33 are all up and down bending tubular structure, and the pipe opening section of first smoke pipe 31, second smoke pipe 32, third smoke pipe 33 is square.

[0026] The tail end of first smoke pipe 31 is inserted in the first end of second smoke pipe 32, the first end of third smoke pipe 33 is inserted in the tail end of second smoke pipe 32, and the tail end of first smoke pipe 31, the first end of third smoke pipe 33 are all fixedly connected with the insertion pipe 35 that the pipe opening caliber of second smoke pipe 32 matches.

[0027] The oven 2 is externally provided with an insulation plate 5, which is fixedly connected to the oven 2 by bolts, and the first flue 31 and the third flue 33 are arranged between the insulation plate 5 and the oven 2.

[0028] The insulation plate 5 is provided with four pieces, and the upper surface and the peripheral surface of the oven 2 are provided with the insulation plate 5. The oven door of the oven 2 is not covered by the insulation plate 5. The first flue 31 and the third flue 33 are arranged between the insulation plate 5 and the oven 2. When the staff member fixes the insulation plate 5 to the oven 2 by bolts, the first flue 31 and the third flue 33 are fixed between the insulation plate 5 and the oven 2. The cross-shaped clamping piece is fixedly connected to the inner side wall of the insulation plate 5. When the insulation plate 5 covers the first flue 31 and the third flue 33, the clamping piece enters the gap near the first flue 31 and the third flue 33, so as to clamp the first flue 31 and the third flue 33, and prevent the first flue 31 and the third flue 33 from moving randomly.

[0029] Working principle: first, the staff member puts the straw into the combustion chamber of the boiler main body 1. The straw combustion produces high-temperature waste gas. The high-temperature waste gas first passes through the first flue 31 to provide heat for the oven 2. The waste gas after cooling flows into the second flue 32 from the first flue 31. Since the second flue 32 is in the combustion chamber of the boiler main body 1, the waste gas flows through the combustion chamber of the boiler main body to cool the furnace wall at the combustion chamber. When the waste gas flows out of the second flue 32, the temperature is increased again. The waste gas flows into the third flue 33 from the second flue 32. Since the third flue 33 is fixedly connected to the upper surface of the oven 2, the heat in the waste gas is utilized by the oven 2 again. Finally, the waste gas is discharged from the waste gas pipe 34.

[0030] The structure, proportion, size and the like shown in the drawings of the specification are only used to cooperate with the content disclosed in the specification, so as to be understood and read by those skilled in the art, and do not have technical substantial meaning for defining the limiting conditions of the implementation of the utility model. Any modification of the structure, change of the proportional relationship or adjustment of the size, without affecting the functions and purposes that can be achieved by the utility model, should still fall within the scope of the technical content disclosed by the utility model. Meanwhile, the terms such as "upper", "lower", "left", "right", "middle" and "one" in the specification are only for the convenience of clear description, and are not used to limit the scope of the implementation of the utility model. The change or adjustment of the relative relationship, without substantially changing the technical content, is also regarded as the implementation range of the utility model.

[0031] The utility model is described above with reference to the preferred embodiments, but the protection scope of the utility model is not limited thereto, and all the technical solutions falling within the scope of claims are within the protection scope of the utility model. Various improvements can be made to the utility model and equivalent components can be substituted for the components thereof without departing from the scope of the utility model. In particular, as long as there is no structural conflict, each technical feature mentioned in each embodiment can be combined in any manner.

Claims

1. A waste heat recovery mechanism of a straw boiler with an oven, comprising a boiler body (1), an oven (2) fixedly connected to the boiler body (1), and a smoke exhaust pipe (3) communicating with the boiler body (1), characterized in that: The smoke exhaust pipe (3) comprises a first smoke exhaust pipe (31) communicated with the first end of the boiler body (1), and a second smoke exhaust pipe (32) communicated with the tail end of the first smoke exhaust pipe (31), the first smoke exhaust pipe (31) is fixedly connected to the outer side wall of the oven (2), the second smoke exhaust pipe (32) is fixedly connected to the inner furnace wall of the boiler body (1), and the tail end of the second smoke exhaust pipe (32) penetrates the furnace wall of the boiler body (1).

2. A waste heat recovery mechanism for a straw boiler with an oven according to claim 1, characterized in that: The tail end of the second smoke exhaust pipe (32) is communicated with the first end of a third smoke exhaust pipe (33), the third smoke exhaust pipe (33) is fixedly connected to the outer side wall of the oven (2), and the tail end of the third smoke exhaust pipe (33) is communicated with a waste gas pipe (34).

3. A waste heat recovery mechanism of a straw boiler with an oven according to claim 2, characterized in that: The first smoke exhaust pipe (31), the second smoke exhaust pipe (32) and the third smoke exhaust pipe (33) are all tubular structures with up-down bending, and the pipe opening sections of the first smoke exhaust pipe (31), the second smoke exhaust pipe (32) and the third smoke exhaust pipe (33) are all square.

4. A waste heat recovery mechanism of a straw boiler with an oven according to claim 2, characterized in that: The tail end of the first smoke exhaust pipe (31) is inserted into the first end of the second smoke exhaust pipe (32), the first end of the third smoke exhaust pipe (33) is inserted into the tail end of the second smoke exhaust pipe (32), and the tail end of the first smoke exhaust pipe (31) and the first end of the third smoke exhaust pipe (33) are both fixedly connected with an insertion pipe (35) matched with the pipe opening diameter of the second smoke exhaust pipe (32).

5. A waste heat recovery unit for a straw boiler with an oven according to any of claims 2 to 4, characterized in that: The oven (2) is externally provided with a heat preservation plate (5), the heat preservation plate (5) is fixedly connected to the oven (2) through bolts, and the first smoke exhaust pipe (31) and the third smoke exhaust pipe (33) are arranged between the heat preservation plate (5) and the oven (2).

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