Raw material preheating device for vertical kiln

Abstract

The utility model discloses a raw material preheating device for a vertical kiln, which comprises a kiln body, a preheating hopper is arranged at the top of the kiln body, a heat exchange mechanism is arranged between the preheating hopper and the kiln body, the heat exchange mechanism comprises an air pipe, a fan, a dust falling pipe and a separating plate, and the air inlet end of the air pipe is communicated with an inner cavity of the kiln body. The air inlet end of the dust falling pipe is communicated with the air outlet end of the air pipe, the air outlet end of the dust falling pipe is communicated with an inner cavity of the preheating hopper, the draught fan is installed on the air pipe, and the separating plate is installed in the dust falling pipe and matched with the inner cavity of the dust falling pipe. According to the raw material preheating device, the preheating hopper at the top of the kiln body can be used for temporarily storing raw materials to be fired, meanwhile, heat in the kiln body is guided into the preheating hopper through the heat exchange mechanism, heat exchange between smoke and the raw materials is completed, the temperature of the raw materials before entering the kiln can be increased, the heat of the smoke can be used, and energy is saved.

Description

Technical Field

[0001] The utility model relates to the technical field of vertical kilns, in particular to a raw material preheating device for vertical kilns. Background Art

[0002] Vertical kilns (hereinafter referred to as vertical kilns) are common in lime kilns. Coal is usually used as fuel. Like stones, it is thrown into the kiln from the top for combustion. However, compared with the inside of the kiln, the temperature of stones and coal is relatively low. If they are directly put into the kiln, they will absorb a lot of heat, which not only affects the temperature inside the kiln, but also slows down the heating of raw materials. In addition, a lot of heat in the kiln will be discharged with the flue gas, resulting in a certain amount of energy waste. Utility Model Content

[0003] The utility model aims to provide a raw material preheating device for a vertical kiln to solve the problem that raw materials directly entering the kiln will absorb a large amount of heat, which not only affects the temperature in the kiln, but also causes the raw materials to heat up slowly. At the same time, the heat in the kiln will also be emptied with the smoke, resulting in a certain amount of energy waste.

[0004] In order to solve the above technical problems, the utility model adopts the following technical solutions:

[0005] A raw material preheating device for a vertical kiln comprises a kiln body, a preheating bucket is arranged on the top of the kiln body, a heat exchange mechanism is arranged between the preheating bucket and the kiln body, the heat exchange mechanism comprises an air duct, a fan, a dust reduction pipe and a separation plate, the air inlet end of the air duct is connected to the inner cavity of the kiln body, the air inlet end of the dust reduction pipe is connected to the air outlet end of the air duct, the air outlet end of the dust reduction pipe is connected to the inner cavity of the preheating bucket, the fan is installed on the air duct, the separation plate is installed in the dust reduction pipe, and the separation plate is adapted to the inner cavity of the dust reduction pipe.

[0006] A further technical solution is: the dust reduction pipe is an arc-shaped pipe that is concave downward.

[0007] A further technical solution is: a discharge port is provided at the bottom of the arc-shaped tube, and the discharge port is located at the feed side of the separation plate.

[0008] A further technical solution is that the discharge port is connected to the inner cavity of the kiln body through a reflux pipe.

[0009] A further technical solution is: the separation plate is composed of a baffle and a filter plate, the baffle is installed in the dust reduction pipe at an angle downward, and the lower end of the baffle is close to the discharge port, and the filter plate is installed on the lower end of the baffle.

[0010] A further technical solution is that: the heat exchange mechanisms are multiple in number and are evenly distributed along the circumference of the kiln body.

[0011] Compared with the prior art, the present invention can achieve at least one of the following beneficial effects:

[0012] The utility model provides a raw material preheating device for a vertical kiln. The raw material preheating device can utilize a preheating bucket on the top of the kiln body to temporarily store raw materials to be fired, and at the same time introduce the heat inside the kiln body into the preheating bucket through a heat exchange mechanism to complete the heat exchange between the flue gas and the raw materials, thereby increasing the temperature of the raw materials before entering the kiln and utilizing the heat of the flue gas to save energy. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 The utility model is a structural schematic diagram of a raw material preheating device for a vertical kiln.

[0014] Figure 2 For this utility model Figure 1 Schematic diagram of the structure of the middle dust reduction pipe and separation plate.

[0015] Figure numerals: 1. kiln body; 2. preheating bucket; 3. heat exchange mechanism; 4. air duct; 5. fan; 6. dust suppression pipe; 7. separation plate; 71. baffle; 72. filter plate; 8. return pipe. DETAILED DESCRIPTION

[0016] In order to make the purpose, technical scheme and advantages of the embodiments of the present invention clearer, the technical scheme in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. The components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0017] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present invention.

[0018] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features thereof may be combined with each other.

[0019] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0020] In the description of the present utility model, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, or the positions or positional relationships in which the utility model product is usually placed when in use, or the positions or positional relationships commonly understood by those skilled in the art, which are only for the convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, the terms "first", "second", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0021] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances. Embodiment 1:

[0022] In this embodiment, Figure 1 and Figure 2 As shown, a raw material preheating device for a vertical kiln comprises a kiln body 1, a preheating bucket 2 is arranged on the top of the kiln body 1, a heat exchange mechanism 3 is arranged between the preheating bucket 2 and the kiln body 1, the heat exchange mechanism 3 comprises an air duct 4, a fan 5, a dust reduction pipe 6 and a separation plate 7, the air inlet end of the air duct 4 is connected with the inner cavity of the kiln body 1, the air inlet end of the dust reduction pipe 6 is connected with the air outlet end of the air duct 4, the air outlet end of the dust reduction pipe 6 is connected with the inner cavity of the preheating bucket 2, the fan 5 is installed on the air duct 4, the separation plate 7 is installed in the dust reduction pipe 6, and the separation plate 7 is adapted to the inner cavity of the dust reduction pipe 6.

[0023] The flue gas in the kiln body 1 is directly discharged into the preheating bucket 2 to directly preheat the raw materials in the preheating bucket 2. At the same time, the excess heat in the kiln body 1 can be discharged into the preheating bucket 2 through the guidance of the fan 5 and the transportation of the air duct 4 and the dust reduction pipe 6, so as to improve the preheating effect of the raw materials. The dust reduction pipe 6 can collect the raw material particles that accidentally flow in through the separation plate 7, and the separation plate 7 will not affect the transportation of the hot air.

[0024] Preferably, the dust suppression pipe 6 is an arc-shaped pipe that is concave downward.

[0025] The curved pipe (bent pipe) is beneficial to the dust reduction of dust particles.

[0026] Preferably, a discharge port is provided at the bottom of the arc-shaped tube, and the discharge port is located at the feed side of the separation plate 7 .

[0027] It is beneficial to discharge the dust accumulated at the bottom of the arc tube.

[0028] Preferably, the discharge port is connected to the inner cavity of the kiln body 1 through a reflux pipe 8 .

[0029] Preferably, the separation plate 7 is composed of a baffle 71 and a filter plate 72 . The baffle 71 is installed in the dust suppression pipe 6 at an angle downward, and the lower end of the baffle 71 is close to the discharge port. The filter plate 72 is installed on the lower end of the baffle 71 .

[0030] The baffle 71 cooperates with the filter plate 72 to block the dust, and the baffle 71 is tilted downward to transport the blocked and settled dust to the discharge port, making it convenient for dust discharge. The dust reduction pipe 6 can collect the raw material particles that accidentally flow in through the separation plate 7, and the separation plate 7 will not affect the transportation of hot air.

[0031] Preferably, there are multiple heat exchange mechanisms 3 , which are evenly distributed along the circumference of the kiln body 1 .

[0032] Improve the ventilation effect and increase the preheating speed.

[0033] The working process of the utility model is as follows: raw materials (including stones and coal blocks) are put into the preheating bucket 2, and the waste heat of the smoke of the vertical kiln is directly used to preheat the raw materials. When the weather is cold or the smoke is insufficient and the temperature is not high, the fan 5 is started, and the fan 5 (high-temperature exhaust fan) extracts the heat from the inner cavity of the kiln body 1, and then introduces the heat in the kiln into the preheating bucket 2 through the air duct 4 and the dust reduction pipe 6, and finally improves (enhances) the preheating effect of the raw materials.

[0034] Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments, or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A raw material preheating device for a vertical kiln, comprising a kiln body (1), characterized in that: A preheating bucket (2) is arranged on the top of the kiln body (1); a heat exchange mechanism (3) is arranged between the preheating bucket (2) and the kiln body (1); the heat exchange mechanism (3) comprises an air duct (4), a fan (5), a dust reduction pipe (6) and a separation plate (7); an air inlet end of the air duct (4) is communicated with the inner cavity of the kiln body (1); an air inlet end of the dust reduction pipe (6) is communicated with the air outlet end of the air duct (4); an air outlet end of the dust reduction pipe (6) is communicated with the inner cavity of the preheating bucket (2); the fan (5) is mounted on the air duct (4); the separation plate (7) is mounted in the dust reduction pipe (6); and the separation plate (7) is adapted to the inner cavity of the dust reduction pipe (6).

2. The raw material preheating device for a vertical kiln according to claim 1, characterized in that: The dust suppression pipe (6) is an arc-shaped pipe that is concave downwards.

3. The raw material preheating device for a vertical kiln according to claim 2, characterized in that: A discharge port is provided at the bottom of the arc-shaped tube, and the discharge port is located on the feed side of the separation plate (7).

4. The raw material preheating device for a vertical kiln according to claim 3, characterized in that: The discharge port is connected to the inner cavity of the kiln body (1) via a reflux pipe (8).

5. The raw material preheating device for a vertical kiln according to claim 3, characterized in that: The separation plate (7) is composed of a baffle (71) and a filter plate (72); the baffle (71) is installed in the dust suppression pipe (6) at an angle downward, and the lower end of the baffle (71) is close to the discharge port; the filter plate (72) is installed on the lower end of the baffle (71).

6. The raw material preheating device for a vertical kiln according to claim 1, characterized in that: The heat exchange mechanisms (3) are multiple in number and are evenly distributed along the circumference of the kiln body (1).

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