Waste gas treatment device for rotary kiln

Abstract

The utility model discloses a rotary kiln waste gas treatment device, which belongs to the technical field of rotary kilns and comprises a heat exchange pipeline, a material preheating mechanism is arranged on the heat exchange pipeline, and a gas guide pipe is fixedly sleeved on the lower portion of one side of the heat exchange pipeline. According to the device, waste gas generated during operation of the rotary kiln is guided into the inner cavity of the heat exchange pipeline through the gas guide pipe, dust in the waste gas is filtered through the filter screen when hot gas flows in the gas guide pipe, and the dust filtering step is carried out before materials are preheated, so that the dust is prevented from being attached to the heat exchange cylinder in the inner cavity of the heat exchange pipeline; in addition, waste gas in the gas guide pipe drives a wind wheel, a scraper and a transmission rod to rotate, dust filtered by the end face of the filter screen is scraped off through rotation of the scraper, the dust falls into a collecting box to be collected, the function of automatically cleaning the dust on the filter screen is achieved, the filtering effect of the filter screen is guaranteed, and practicability is good.

Description

TECHNICAL FIELD

[0001] The utility model relates to rotary kiln technology field more specifically, relate to a rotary kiln waste gas treatment device. BACKGROUND

[0002] Rotary kiln is a common thermal equipment, mainly used for calcining, baking or drying granular and powder material, it is usually built by reinforced concrete and brick, and is in the shape of a cylinder, which can be installed horizontally or slightly inclined. Rotary kiln produces waste gas during operation, which needs to be treated to meet emission standards.

[0003] After searching, the utility model patent with publication number CN215177007U discloses a rotary kiln waste gas treatment device, which comprises a waste gas pipeline and a material preheating mechanism arranged in the waste gas pipeline; the material preheating mechanism comprises a vertical spiral pipe, the top of the spiral pipe is provided with a material inlet, and the bottom of the spiral pipe is provided with a material outlet; the waste gas in the waste gas pipeline passes through the spiral pipe from bottom to top; the gas inlet of the waste gas pipeline is communicated with the rotary kiln, and the gas outlet of the waste gas pipeline is provided with a dust filtering mechanism; a spiral pipe is vertically arranged in the waste gas pipeline, the material enters from the top of the spiral pipe, passes through the spiral pipe, and is discharged from the bottom of the spiral pipe; the waste gas rises from the bottom of the spiral pipe, and the material is preheated by heat exchange during the rising of the waste gas and the descending of the material. In the utility model, the material moves in the spiral pipe for a long time, which can fully exchange heat with the waste gas and improve the utilization rate of the waste gas.

[0004] However, the above-mentioned patent still has the following disadvantages: the dust in the waste gas is treated after heat exchange between the spiral pipe and the waste gas, the dust in the waste gas is easy to adhere to the outside of the spiral pipe, which affects the efficiency of subsequent heat exchange, and after filtering the dust in the waste gas, manpower is needed to clean the dust on the filter screen, which is not convenient; and the material may be blocked in the spiral pipe, which is not convenient to treat. Therefore, we propose a rotary kiln waste gas treatment device. UTILITY MODEL CONTENT

[0005] In view of the problems in the prior art, the utility model aims to provide a rotary kiln waste gas treatment device.

[0006] To solve the above problems, the utility model adopts the following technical scheme:

[0007] The utility model relates to a rotary kiln waste gas treatment device, including heat exchange pipeline, be provided with material preheating mechanism on the heat exchange pipeline, the lower part of one side of heat exchange pipeline is fixedly sleeved with the air guide pipe, the upper part of the other side of heat exchange pipeline is fixedly connected with the exhaust pipe, the bottom of air guide pipe is fixedly connected with the collection box, the inner chamber of air guide pipe is fixedly sleeved with filter screen, the end surface of filter screen and the inner wall of collection box are flush, the middle part of filter screen is rotatably connected with transmission rod, one end of transmission rod extends to one side of filter screen and is fixedly connected with the scraper, the end surface of scraper and the end surface of filter screen are attached, the other end of transmission rod extends to the other side of filter screen and is fixedly connected with the wind wheel.

[0008] As a preferred scheme of the utility model, the material preheating mechanism includes the heat exchange cylinder fixedly sleeved in the inner chamber of heat exchange pipeline, the bottom end of heat exchange cylinder is fixedly sleeved to the bottom of heat exchange pipeline, the top end of heat exchange cylinder extends to the top of heat exchange pipeline and is fixedly connected with the loading hopper, the top surface of loading hopper is fixedly connected with the mounting bracket, the top surface of one end of mounting bracket is fixedly installed with the servo motor, the output shaft of servo motor extends to the inner chamber of loading hopper and is fixedly connected with the spiral conveying rod, the bottom end of spiral conveying rod is movably sleeved to the inner chamber of heat exchange cylinder, the side surface of heat exchange cylinder and the inner wall of heat exchange pipeline are provided with spiral flow guide plate.

[0009] As a preferred scheme of the utility model, the outer side of collection box is hingedly connected with the sealing box door.

[0010] As a preferred scheme of the utility model, the outer side of collection box is fixedly installed with the control panel, and the control panel and the servo motor are electrically connected.

[0011] As a preferred scheme of the utility model, the top surface of mounting bracket and located at the outer side of servo motor is fixedly connected with the protective shell.

[0012] As a preferred scheme of the utility model, the side surface of spiral conveying rod and the inner wall of heat exchange cylinder are attached.

[0013] Compared with the prior art, the utility model has the advantages that:

[0014] (1) The utility model discloses a waste gas generated when rotary kiln runs is guided into the inner chamber of heat exchange pipeline through the air guide pipe, and the heat in the waste gas is utilized to preheat the material, when the hot gas flows in the air guide pipe, the filter screen is utilized to filter the dust in the waste gas, the dust filtering step is placed before the preheating of the material, avoids the dust from adhering to the heat exchange cylinder in the inner chamber of heat exchange pipeline, and the waste gas in the air guide pipe drives the rotation of the wind wheel, the scraper and the transmission rod, the rotation of the scraper is utilized to scrape off the dust filtered on the end face of the filter screen, and the dust falls into the collecting box and is collected, the function that the dust on the filter screen is automatically cleaned is realized, the filtering effect of the filter screen is guaranteed, and the practicality is good.

[0015] (2) The utility model discloses a heat exchange cylinder, loading hopper, mounting frame, servo motor, spiral feed rod and spiral flow guide plate are used in cooperation, the material in loading hopper moves downward in heat exchange cylinder through servo motor driving spiral feed rod rotation, and the heat in waste gas and the material in heat exchange cylinder are utilized to carry out heat exchange, thereby preheating the material, the conveying of spiral feed rod to the material avoids the blocking of the material, and the waste gas in the inner chamber of heat exchange pipeline rotates in spiral flow guide plate, increases the efficiency and quality of the heat exchange between hot gas and the material in heat exchange cylinder, and the practicality of the rotary kiln waste gas treatment device is improved. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 It is whole structure schematic diagram of the utility model;

[0017] Figure 2 It is sectional view schematic diagram of the utility model;

[0018] Figure 3 It is structure schematic diagram of air guide pipe of the utility model;

[0019] Figure 4 It is structure schematic diagram of wind wheel of the utility model.

[0020] Mark explanation in drawing:

[0021] 1, heat exchange pipeline;2, material preheating mechanism;3, air guide pipe;4, collecting box;5, filter screen;6, transmission rod;7, scraper;8, wind wheel;9, exhaust pipe;10, sealing box door;11, control panel;12, heat exchange cylinder;13, loading hopper;14, mounting frame;15, servo motor;16, spiral feed rod;17, spiral flow guide plate;18, protective shell. DETAILED DESCRIPTION

[0022] The technical solutions in the embodiments of the present application will be clearly and completely described with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments of the present application, all the other embodiments obtained by those skilled in the art without creative work fall within the scope of the present application.

[0023] In the description of the present application, it should be noted that the terms "upper", "lower", "inner", "outer", "top / bottom end" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to 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" are only for the purpose of description, and cannot be understood as indicating or implying relative importance.

[0024] In the description of the present application, it should be noted that, unless otherwise explicitly specified and limited, the terms "mounting", "provided with", "sleeved / connected", "connected" and the like should be broadly understood, for example, "connected" can be fixedly connected, or can be detachably connected, or integrally connected; can be mechanically connected, or can be electrically connected; can be directly connected, or can be indirectly connected through an intermediate medium; can be internal communication of 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.

[0025] Embodiment:

[0026] Please refer to Figures 1-4 A rotary kiln waste gas treatment device, including heat exchange pipeline 1, heat exchange pipeline 1 is provided with material preheating mechanism 2, the lower part of one side of heat exchange pipeline 1 is fixedly sleeved with gas guide pipe 3, the upper part of the other side of heat exchange pipeline 1 is fixedly connected with exhaust pipe 9, the bottom of gas guide pipe 3 is fixedly connected with collection box 4, the inner chamber of gas guide pipe 3 is fixedly sleeved with filter screen 5, the end surface of filter screen 5 and the inner wall of collection box 4 are flush, the middle part of filter screen 5 is rotatably connected with transmission rod 6, one end of transmission rod 6 extends to one side of filter screen 5 and is fixedly connected with scraper 7, the end surface of scraper 7 and the end surface of filter screen 5 are attached, the other end of transmission rod 6 extends to the other side of filter screen 5 and is fixedly connected with wind wheel 8.

[0027] Specifically, please refer to Figure 1 And Figure 2The material preheating mechanism 2 comprises a heat exchange cylinder 12 sleeved in the inner cavity of the heat exchange pipeline 1, the bottom end of the heat exchange cylinder 12 is sleeved to the bottom of the heat exchange pipeline 1, the top end of the heat exchange cylinder 12 extends to the top of the heat exchange pipeline 1 and is fixedly connected with a charging hopper 13, the top surface of the charging hopper 13 is fixedly connected with a mounting frame 14, the top surface of one end of the mounting frame 14 is fixedly installed with a servo motor 15, the output shaft of the servo motor 15 extends to the inner cavity of the charging hopper 13 and is fixedly connected with a spiral conveying rod 16, the bottom end of the spiral conveying rod 16 is movably sleeved to the inner cavity of the heat exchange cylinder 12, and the spiral flow guide plates 17 are arranged between the side surface of the heat exchange cylinder 12 and the inner wall of the heat exchange pipeline 1.

[0028] In the embodiment, the spiral flow guide plates 17 guide the waste gas in the inner cavity of the heat exchange pipeline 1, and the heat exchange effect of the heat in the waste gas and the material in the heat exchange cylinder 12 is increased.

[0029] Specifically, please refer to Figure 1 The outer side of the collecting box 4 is hingedly connected with a sealing box door 10.

[0030] In the embodiment, the dust collected in the inner cavity of the collecting box 4 is treated by opening the control panel 11.

[0031] Specifically, please refer to Figure 1 and Figure 2 The outer side of the collecting box 4 is fixedly installed with the control panel 11, and the control panel 11 and the servo motor 15 are electrically connected.

[0032] In the embodiment, the control panel 11 is used to control the servo motor 15, and the servo motor 15 drives the spiral conveying rod 16 to rotate.

[0033] Specifically, please refer to Figure 1 and Figure 2 The top surface of the mounting frame 14 and located at the outer side of the servo motor 15 is fixedly connected with a protective shell 18.

[0034] In the embodiment, the protective shell 18 is used to protect the servo motor 15.

[0035] Specifically, please refer to Figure 2 The side surface of the spiral conveying rod 16 is in close contact with the inner wall of the heat exchange cylinder 12.

[0036] In the embodiment, it is ensured that the spiral conveying rod 16 moves the material from the inner cavity of the heat exchange cylinder 12, the time of the material staying in the heat exchange cylinder 12 is increased, and the material is prevented from being blocked in the heat exchange cylinder 12.

[0037] Working principle: in use, firstly, the waste gas produced during the operation of the rotary kiln is introduced into the inner cavity of the heat exchange pipeline 1 from the air guide pipe 3, and the filter screen 5 in the inner cavity of the air guide pipe 3 is used to filter the dust in the waste gas, the filtered waste gas drives the wind wheel 8 to rotate, the wind wheel 8 drives the scraper 7 and the transmission rod 6 to rotate, the dust filtered on the end face of the filter screen 5 is scraped off by the rotation of the scraper 7, and the dust falls into the collecting box 4 for collection, then the waste gas in the inner cavity of the heat exchange pipeline 1 rotates in the spiral guide plate 17, and the material to be placed in the rotary kiln for treatment is put into the charging hopper 13, the servo motor 15 is started to drive the spiral material conveying rod 16 to rotate, the material in the charging hopper 13 is moved from top to bottom in the heat exchange cylinder 12 through the spiral material conveying rod 16, the heat of the waste gas in the inner cavity of the heat exchange pipeline 1 is used to preheat the material in the heat exchange cylinder 12, finally the waste gas is discharged from the exhaust pipe 9, and the material in the heat exchange cylinder 12 is discharged from the lower end, and the preheated material is placed in the rotary kiln for subsequent treatment.

[0038] The above is only a preferred specific embodiment of the present application, but the protection scope of the present application is not limited to this, any skilled person in the art can make equivalent replacement or change according to the technical scheme and improvement concept of the present application within the technical range disclosed by the present application, which should be covered in the protection scope of the present application.

Claims

1. A rotary kiln exhaust gas treatment device comprising a heat exchange pipeline (1), characterized in that: The heat exchange pipeline (1) is provided with a material preheating mechanism (2), the lower part of one side of the heat exchange pipeline (1) is fixedly sleeved with a gas guide pipe (3), the upper part of the other side of the heat exchange pipeline (1) is fixedly connected with an exhaust pipe (9), the bottom of the gas guide pipe (3) is fixedly connected with a collecting box (4), the inner cavity of the gas guide pipe (3) is fixedly sleeved with a filter screen (5), the end surface of the filter screen (5) is flush with the inner wall of the collecting box (4), the middle part of the filter screen (5) is rotatably connected with a transmission rod (6), one end of the transmission rod (6) extends to one side of the filter screen (5) and is fixedly connected with a scraper (7), the end surface of the scraper (7) is attached to the end surface of the filter screen (5), the other end of the transmission rod (6) extends to the other side of the filter screen (5) and is fixedly connected with a wind wheel (8).

2. A rotary kiln exhaust gas treatment apparatus according to claim 1, characterized in that: The material preheating mechanism (2) comprises a heat exchange cylinder (12) fixedly sleeved in the inner cavity of the heat exchange pipeline (1), the bottom end of the heat exchange cylinder (12) is fixedly sleeved to the bottom of the heat exchange pipeline (1), the top end of the heat exchange cylinder (12) extends to the top of the heat exchange pipeline (1) and is fixedly connected with a charging hopper (13), the top surface of the charging hopper (13) is fixedly connected with a mounting bracket (14), the top surface of one end of the mounting bracket (14) is fixedly installed with a servo motor (15), the output shaft of the servo motor (15) extends to the inner cavity of the charging hopper (13) and is fixedly connected with a spiral conveying rod (16), the bottom end of the spiral conveying rod (16) is movably sleeved in the inner cavity of the heat exchange cylinder (12), the side surface of the heat exchange cylinder (12) and the inner wall of the heat exchange pipeline (1) are provided with a spiral flow guide plate (17).

3. A rotary kiln exhaust gas treatment apparatus according to claim 1, characterized in that: The outer side of the collecting box (4) is hingedly connected with a sealing box door (10).

4. A rotary kiln exhaust gas treatment apparatus according to claim 1, characterized in that: The outer side of the collecting box (4) is fixedly installed with a control panel (11), and the control panel (11) and the servo motor (15) are electrically connected.

5. A rotary kiln exhaust gas treatment apparatus according to claim 2, characterized in that: The top surface of the mounting bracket (14) and located outside the servo motor (15) is fixedly connected with a protective shell (18).

6. A rotary kiln exhaust gas treatment apparatus according to claim 2, characterized by: The side surface of the spiral conveying rod (16) is attached to the inner wall of the heat exchange cylinder (12).

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