Hot blast stove for drying and heating asphalt reclaimed materials

Abstract

The utility model relates to the technical field of hot recycled asphalt mixture stirring equipment, in particular to a hot-blast stove for drying and heating asphalt recycled materials. Comprising a furnace body, a front-section inner cylinder, a middle-section hearth, a rear-section hearth and an end air inlet adjusting device, an end plate is arranged at one end of the furnace body, an air inlet is formed in the lower part of the end plate and is eccentrically arranged, the air inlet of the furnace body is divided into two air inlets by the front-section inner barrel, an air inlet end plate is arranged at one end of the front-section inner barrel, an air inlet is formed in the air inlet end plate, air inlets are formed in the periphery of the middle-section hearth, an interlayer thermodetector is arranged in the middle-section hearth, and air inlets are formed in the periphery of the rear-section hearth; a hearth thermodetector is arranged in the rear-section hearth, and an end air inlet adjusting device controls the air inlet amount of the end of the front-section inner cylinder; according to the hot-blast stove for drying and heating the asphalt reclaimed materials, circulating air is used for effectively cooling the hearth of the stove body, hot air is evenly mixed, the heat exchange efficiency is high, and the defects that an existing hot-blast stove is prone to being burnt out, short in service life, large in heat loss and the like are overcome.

Description

Technical Field

[0001] The utility model relates to the technical field of hot regenerated asphalt mixture stirring equipment, in particular to a hot air furnace for drying and heating asphalt regeneration material. Background Art

[0002] The furnace of the traditional hot blast furnace used for heating recycled asphalt is generally made of refractory bricks or refractory materials. The manufacturing process is complicated. The heat loss is high due to the heat conduction of refractory bricks or refractory materials, and the hot blast furnace does not take any cooling measures. The shell of the hot blast furnace is easily damaged by high temperature for a long time and has a short life. It needs frequent maintenance and replacement, which affects the efficiency of the hot recycled asphalt mixture mixing equipment.

[0003] Therefore, there is an urgent need to design a hot air furnace for drying and heating asphalt recycled materials to solve the problems of easy burning, short service life and high heat loss of existing hot air furnaces. Utility Model Content

[0004] In view of the problems existing in the prior art, the purpose of the utility model is to provide a hot air furnace for drying and heating asphalt recycled materials.

[0005] The technical solution adopted by the utility model to solve its technical problems is: a hot air furnace for drying and heating asphalt recycled materials, including a furnace body, a front inner tube, a middle furnace, a rear furnace and an end air inlet adjustment device, the furnace body is the outer shell of the hot air furnace, the middle furnace and the rear furnace are provided with supporting legs on the outside, the supporting legs and the furnace body together constitute the external structure of the hot air furnace, the front inner tube is arranged inside the furnace body and forms a cavity, the middle furnace is arranged at the tail of the front inner tube, the middle furnace and the furnace body form a cavity, the rear furnace is arranged at the tail of the middle furnace, the rear furnace and the middle furnace are arranged axially in a stepped manner, and the rear furnace and the furnace body form a cavity.

[0006] Specifically, an end plate is provided at one end of the furnace body, and an air inlet at the bottom of the furnace body is provided at the lower part of the end plate, and the air inlet is eccentrically arranged.

[0007] Specifically, the front inner tube divides the furnace body air inlet into a furnace body end air inlet and a furnace body bottom air inlet, and an air inlet end plate is provided at one end of the front inner tube, and the furnace body end air inlet is provided on the air inlet end plate.

[0008] Specifically, a middle section air inlet net is arranged around the middle section furnace, and a sandwich temperature measuring instrument is arranged inside the middle section furnace.

[0009] Specifically, a rear air inlet net is arranged around the rear section furnace, and a furnace temperature measuring instrument is arranged between the rear section furnace and the furnace body.

[0010] Specifically, the end air inlet adjustment device controls the air inlet volume of the air inlet at the bottom of the furnace body.

[0011] The utility model has the following beneficial effects:

[0012] The hot air furnace for drying and heating asphalt recycled material designed by the utility model utilizes circulating air to effectively cool the furnace body and furnace, mixes the hot air evenly, and has high heat exchange efficiency, thus overcoming the shortcomings of existing hot air furnaces such as easy burning, short service life, and high heat loss. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the structure of a hot air furnace for drying and heating asphalt recycled materials.

[0014] Figure 2 It is a cross-sectional view of the end air inlet adjustment device.

[0015] In the figure: 1-furnace body, 1.1-end air inlet adjustment device, 1.2-end plate; 2-front inner tube; 3-support legs; 4-middle furnace, 4.1-interlayer temperature measuring instrument; 5-rear furnace, 5.1-furnace temperature measuring instrument. DETAILED DESCRIPTION

[0016] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely further describe the technical solutions in the embodiments of the utility model. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0017] Embodiment 1:

[0018] like Figure 1-Figure 2 As shown, it includes a furnace body 1, a front inner tube 2, a middle furnace 4, a rear furnace 5 and an end air inlet adjustment device 1.1, the furnace body 1 is the outer shell of the hot blast stove, the middle furnace 4 and the rear furnace 5 are provided with supporting legs 3 on the outside, and the supporting legs 3 and the furnace body 1 together constitute the external structure of the hot blast stove, the front inner tube 2 is arranged inside the furnace body 1 and forms a cavity, the middle furnace 4 is arranged at the tail of the front inner tube 2, the middle furnace 4 and the furnace body 1 form a cavity, the rear furnace 5 is arranged at the tail of the middle furnace 4, the rear furnace 5 and the middle furnace 4 are axially arranged in a stepped shape, and the rear furnace 5 and the furnace body 1 form a cavity.

[0019] The furnace body 1 is the outer shell of the hot air furnace. The air inlet of the furnace body 1 is eccentrically arranged for circulating air to enter the cavity and mix evenly with the hot air to form a low-temperature airflow zone. An end air inlet regulating device 1.1 is arranged at the lower part of the furnace body 1 to control the air inlet volume of the air inlet at the bottom of the furnace body.

[0020] The front inner tube 2 is arranged inside the furnace body 1 and forms a cavity. The front inner tube 2 divides the air inlet of the furnace body 1 into the air inlet at the end of the furnace body and the air inlet at the bottom of the furnace body. An air inlet end plate 1.2 is provided at one end of the front inner tube 2. The air inlet end plate 1.2 is provided with the air inlet at the end of the furnace body, which is used for circulating air (clean air after passing through the dust collector with a certain temperature) to enter the burner (the burner is inserted from the end of the hot blast furnace into the front inner tube 2 to burn and release heat) to push the hot air forward.

[0021] The middle furnace 4 and the rear furnace 5 are provided with supporting legs 3 on the outside. The supporting legs 3 and the furnace body 1 together constitute the external structure of the hot blast furnace as a carrier of other components. The middle furnace 4 and the rear furnace 5 are provided with dense air inlets around them. The circulating air rotates in from the gap between the two furnaces. The circulating air forms a protective airflow layer on the inner wall of the furnace and is fully mixed with the hot air from the burner.

[0022] An interlayer temperature measuring instrument 4.1 is provided inside the middle furnace 4 for measuring the temperature at the interlayer between the furnace and the furnace body 1; a furnace temperature measuring instrument 5.1 is provided between the furnace and the furnace body 1 of the rear furnace 5 for measuring the temperature inside the furnace.

[0023] Embodiment 2: Specific implementation steps using the structural form of embodiment 1.

[0024] The circulating air is divided into two parts from the eccentric air inlet at the bottom of the hot blast furnace. One part enters the cavity between the furnace and the shell. The low temperature of the circulating air effectively protects the shell from being roasted at high temperature. Due to the eccentricity of the air inlet, the circulating air rotates and moves forward in the cavity, and enters the furnace through the air inlets around the furnace. Due to the dense number of air inlets, a protective air flow layer is formed on the inner wall of the furnace to protect the furnace from being roasted at high temperature. Since the circulating air rotates and enters, it is evenly mixed with the hot air from the combustion burner, and the heat exchange efficiency is high. The other part enters the interior of the furnace from the air inlet 1.2 of the end plate 1.2 of the front inner tube 2, pushing the hot air forward. The end air inlet regulating device 1.1 is adjusted according to the temperature measured by the thermometer to control the air intake volume to ensure that the hot air at an ideal temperature is obtained.

[0025] The present utility model is not limited to the above-mentioned implementation modes, and anyone should be aware of the structural changes made under the inspiration of the present utility model. Any technical solutions that are the same or similar to the present utility model fall within the protection scope of the present utility model.

[0026] The technology, shape and structure parts not described in detail in the present invention are all known technologies.

[0027] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants 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.

[0028] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A hot air furnace for drying and heating asphalt recycled materials, characterized in that: It includes a furnace body, a front inner tube, a middle furnace, a rear furnace and an end air inlet adjustment device, wherein the furnace body is the outer shell of the hot blast furnace, the middle furnace and the rear furnace are provided with supporting legs on the outside, and the supporting legs and the furnace body together constitute the external structure of the hot blast furnace, the front inner tube is arranged inside the furnace body and forms a cavity, the middle furnace is arranged at the tail of the front inner tube, the middle furnace and the furnace body form a cavity, the rear furnace is arranged at the tail of the middle furnace, the rear furnace and the middle furnace are arranged axially in a stepped shape, and the rear furnace and the furnace body form a cavity.

2. The hot air furnace for drying and heating asphalt recycled materials according to claim 1 is characterized in that: An end plate is provided at one end of the furnace body, and an air inlet at the bottom of the furnace body is provided at the lower part of the end plate, and the air inlet is eccentrically arranged.

3. The hot air furnace for drying and heating asphalt recycled materials according to claim 1, characterized in that: The front inner tube divides the furnace body air inlet into a furnace body end air inlet and a furnace body bottom air inlet. An air inlet end plate is arranged at one end of the front inner tube, and the furnace body end air inlet is arranged on the air inlet end plate.

4. The hot air furnace for drying and heating asphalt recycled materials according to claim 1 is characterized in that: A middle section air inlet net is arranged around the middle section furnace, and a sandwich temperature measuring instrument is arranged inside the middle section furnace.

5. The hot air furnace for drying and heating asphalt recycled materials according to claim 1, characterized in that: A rear air inlet net is arranged around the rear furnace, and a furnace temperature measuring instrument is arranged between the rear furnace and the furnace body.

6. The hot air furnace for drying and heating asphalt recycled materials according to claim 1, characterized in that: The end air inlet regulating device controls the air inlet volume of the air inlet at the bottom of the furnace body.

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