Swing type sintering kiln capable of accurately controlling temperature

Abstract

According to the swing type sintering kiln capable of accurately controlling the temperature, the fuel input pipeline and the combustion-supporting air input pipeline are formed based on hard pipelines, outlets of the two pipelines are connected with a combustor, and inlets of the two pipelines are connected with a rotary joint for auxiliary fuel and a rotary joint for combustion-supporting air respectively; an inlet and an outlet of the rotary joint are formed in the stator and the rotor respectively, meanwhile, the rotation axis of the rotary joint coincides with the swing axis of the kiln body, and when the kiln body swings with the center line of the kiln body as the swing axis, the portion, connected with the fuel input pipeline and the combustion-supporting air input pipeline, of the rotary joint can swing at the same angle along with the kiln body. Meanwhile, parts, connected with fuel supply equipment and combustion-supporting air supply equipment, on the rotary joint can be kept fixed, fuel and combustion-supporting air are continuously provided for the combustor through the rotary joint in the swinging process, and meanwhile, the output of the combustor is adjusted in cooperation with feedback of a temperature detection device to conduct accurate temperature control on the inner cavities of all the sections of the kiln body.

Description

Technical Field

[0001] The utility model relates to the technical field of solid waste and hazardous waste treatment, in particular to a swing-type sintering kiln capable of accurately controlling temperature. Background Art

[0002] In the prior art, the traditional methods for pyrolysis roasting, sintering and calcining of materials mainly use rotary kilns and tunnel kilns. For example, the patent with application number CN202021581076.5 is a high-chlorine hazardous waste incineration disposal system currently used by our company, and the hazardous waste incineration equipment used is a rotary kiln. The rotary kiln has the advantages of good stirring effect, large production capacity adjustment range, and controllable residence time. However, because the rotary kiln cylinder needs to rotate continuously, heating or detection facilities cannot be installed on the surface of the cylinder. Therefore, the burner and instrument detection of the rotary kiln can only be installed on the kiln head hood and kiln tail hood panels. This results in a limited range of radiation for the heating facilities. Although it can be adjusted to a limited extent by adjusting the flame length, diameter, etc., it is impossible to accurately control the temperature of each area in the kiln.

[0003] The tunnel kiln is a traditional furnace type used for roasting and calcining. It is widely used in the pyrometallurgical sintering of ceramics, refractory materials, minerals, etc. It is mainly composed of a kiln body, kiln conveying equipment, a fuel combustion system, ventilation equipment, etc. Its characteristics are that it can realize large-scale, continuous high-temperature sintering treatment, and the temperature of each temperature section can also be precisely controlled. However, its biggest disadvantage is that the materials are piled on the kiln car and are in a static state. There is no turning or stirring effect, which often leads to uneven outside and inside of the fired materials. Summary of the invention

[0004] In order to solve the problems in the prior art that the temperature of each area in the rotary kiln cannot be accurately controlled and the tunnel kiln has uneven burning of materials inside and outside, the utility model provides a swing sintering kiln with accurate temperature control, which can simultaneously achieve accurate temperature control and turning and stirring to ensure that the fired materials are uniform inside and outside.

[0005] The structure of the utility model is as follows: a swing type sintering kiln capable of precise temperature control, comprising: a kiln body, a burner, a temperature detection device, an auxiliary fuel input structure and a combustion-supporting air input structure; a feed inlet and a discharge inlet are respectively arranged at both ends of the kiln body, and the feed inlet and the discharge inlet are respectively connected to the inner cavity of the kiln body;

[0006] The invention is characterized in that it further comprises: a swing driving structure, under the drive of the swing driving structure, the kiln body performs reciprocating swing from the kiln head to the kiln tail with the kiln body center line as the swing axis;

[0007] The burner and the temperature detection device are fixedly mounted on the kiln body;

[0008] The auxiliary fuel input structure comprises: a fuel input pipeline and a rotary joint for auxiliary fuel;

[0009] The combustion-supporting air input structure comprises: a combustion-supporting air input pipeline and a combustion-supporting air rotary joint;

[0010] The fuel input pipeline and the combustion-supporting air input pipeline are realized based on hard fixed pipelines; one end of the fuel input pipeline is connected to the burner, and the other end is connected to the rotor of the auxiliary fuel rotary joint; one end of the combustion-supporting air input pipeline is connected to the burner, and the other end is connected to the rotor of the combustion-supporting air rotary joint;

[0011] The rotation axes of the auxiliary fuel rotary joint and the combustion-supporting air rotary joint coincide with the swing axis;

[0012] The fuel outlet of the auxiliary fuel rotary joint is connected to the fuel input pipeline, and the fuel inlet is connected to the fuel supply equipment;

[0013] The gas outlet of the combustion-supporting air rotary joint is connected to the combustion-supporting air input pipeline, and the gas inlet is connected to the combustion-supporting air supply equipment.

[0014] It is further characterized by:

[0015] The kiln body is divided into a plurality of detection areas along the length direction, and each detection area is provided with at least one temperature detection device; the temperature detection device and the burner are provided in a matching manner, and each temperature detection device is provided with at least one burner;

[0016] It also includes: a fume outlet, a kiln head cover and a kiln tail cover, wherein the kiln head cover and the kiln tail cover are respectively arranged at two ends of the kiln body;

[0017] The feed inlet and the smoke outlet are located on the kiln head cover, the feed inlet is located on the kiln head cover panel, and the smoke outlet is located on the top side of the kiln head cover; the discharge port is located at the bottom of the kiln tail cover;

[0018] The swing drive structure is implemented based on a motor; the number of the swing drive structures is greater than or equal to 1;

[0019] The kiln body is arranged tilted, and the kiln head cover and the kiln tail cover are respectively located at the high end and the low end.

[0020] The utility model provides a swing type sintering kiln capable of precise temperature control, which is based on a fuel input pipeline and a combustion-supporting air input pipeline composed of hard pipes, the outlets of the two pipelines are connected to the burner, and the inlets are respectively connected to a rotary joint for auxiliary fuel and a rotary joint for combustion-supporting air; the inlet and outlet of the rotary joint are respectively arranged on the stator and the rotor, and the rotation axis of the rotary joint coincides with the swing axis of the kiln body. Under such a connection mode, when the kiln body is driven by the swing drive structure to swing with the center line of the kiln body as the swing axis, because the temperature detection device and the burner are fixedly installed on the kiln body, the fuel The part of the rotary joint connecting the input pipe and the combustion-supporting air input pipe can swing at the same angle as the kiln body, and at the same time, the parts on the rotary joint connected to the fuel supply equipment and the combustion-supporting air supply equipment can remain fixed, so that fuel and combustion-supporting air can be continuously supplied to the burner through the rotary joint during the swinging process, and the burner output can be adjusted in conjunction with the feedback of the temperature detection device to perform precise temperature control on the inner cavity of each section of the kiln body; at the same time, the swinging kiln body can effectively realize the turning, movement and sufficient heat exchange of materials, improve the heat utilization rate while ensuring sufficient residence time, and ensure that the fired materials are uniform inside and outside. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a structural schematic diagram of the swing type sintering kiln in this application;

[0022] Figure 2 This is an example of the structure of a rotary joint for combustion air. DETAILED DESCRIPTION

[0023] like Figure 1 As shown, the utility model includes a swing type sintering kiln capable of precise temperature control, which includes: a kiln body 1, a burner 2, a temperature detection device 3, a swing drive structure 8, a feed port 1-1, a discharge port 1-2, a kiln head cover 1-3, a kiln tail cover 1-4, a smoke outlet 1-5, an auxiliary fuel input structure and a combustion-supporting air input structure. The burner 2 and the temperature detection device 3 are fixedly mounted on the kiln body 1. In the working state, driven by the swing drive structure 8, the kiln body 1 swings from the kiln head to the kiln tail with the center line a of the kiln body 1 as the swing axis.

[0024] The kiln head hood 1-3 and the kiln tail hood 1-4 are respectively arranged at the two ends of the kiln body 1. The kiln body 1 is inclined, and the inclination angle of the kiln body 1 is determined comprehensively according to the processing volume, residence time, etc. The kiln head hood 1-3 is located at the high end, and the kiln tail hood 1-4 is located at the low end; the feed port 1-1 and the smoke outlet 1-5 are located on the kiln head hood 1-3, the feed port 1-1 is located on the panel of the kiln head hood 1-3, and the smoke outlet 1-5 is located on the top side of the kiln head hood 1-3; the discharge port 1-2 is located at the bottom of the kiln tail hood 1-4; the feed port 1-1 and the discharge port 1-2 are respectively connected to the inner cavity of the kiln body 1. The solid waste and hazardous waste materials to be incinerated enter the inner cavity of the kiln body 1 from the feed port 1-1. During the incineration process, they gradually slide from high to low along the inclined direction to the discharge port 1-2, and then are discharged from the discharge port 1-2. The incineration generates smoke, which is discharged from the smoke outlet 1-5. During the combustion process, the temperature of the inner cavity of the kiln body 1 is monitored in real time by the temperature detection device 3, and the temperature inside the kiln body 1 is adjusted based on the burner 2. In specific implementation, according to actual needs, the inner cavity of the kiln body 1 can also be provided with auxiliary structures, such as: a combined lifting plate structure or a spiral stirring facility, to improve material turning and heat exchange, further improve heat utilization, and increase material residence time to ensure sufficient combustion.

[0025] Figure 1 In the embodiment, the auxiliary fuel input structure includes: a fuel input pipeline 5 and an auxiliary fuel rotary joint 7, the fuel input pipeline 5 is connected to the rotor of the auxiliary fuel rotary joint 7; the outlet of the fuel input pipeline 5 is connected to the burner 2, and the inlet is connected to the auxiliary fuel rotary joint 7. The combustion-supporting air input structure includes: a combustion-supporting air input pipeline 4 and a combustion-supporting air rotary joint 6, the combustion-supporting air input pipeline 4 is connected to the rotor of the combustion-supporting air rotary joint 6; the outlet of the combustion-supporting air input pipeline 4 is connected to the burner 2, and the inlet is connected to the combustion-supporting air rotary joint 6. Through reasonable support and rotary joint connection, the dynamic swing of the burner side and the static separation of the fuel / combustion-supporting air input side are achieved.

[0026] The fuel outlet of the auxiliary fuel rotary joint 7 is connected to the fuel input pipeline 5, and the fuel inlet is connected to the fuel supply equipment (not marked in the figure);

[0027] The gas outlet of the combustion-supporting air rotary joint is connected to the combustion-supporting air input pipeline 4, and the gas inlet is connected to the combustion-supporting air supply equipment (not marked in the figure).

[0028] The auxiliary fuel rotary joint 7 and the combustion-supporting air rotary joint 6 have the same structure, and can be implemented based on any single-channel or multi-channel rotary joint in the prior art.

[0029] like Figure 2The figure shows an embodiment of the combustion-supporting air rotary joint 6. The combustion-supporting air rotary joint 6 comprises a coaxially arranged rotor and a stator, and the stator 6-1 is fixedly mounted on a mounting structure (not marked in the figure). The barreled stator 6-1 is arranged on the outside of the rotor (not marked in the figure), the gas outlet 6-2 of the combustion-supporting air rotary joint 6 is located on the end face of the rotor, and the gas inlet 6-3 is arranged on the side wall of the stator 6-1. The gas inlet 6-3 is connected to the combustion-supporting air supply device. In use, the combustion-supporting air output by the combustion-supporting air supply device enters the combustion-supporting air rotary joint 6 from the gas inlet 6-3, and then enters the combustion-supporting air input pipe 4 from the gas outlet 6-2.

[0030] The burner 2 is fixedly mounted on the kiln body 1, and one end of the combustion-supporting air input pipe 4 is mounted on the burner 2. When the kiln body 1 is driven by the swing drive structure 8 to swing with the center line a as the swing axis, the combustion-supporting air input pipe 4 will swing synchronously with the kiln body 1; and the other end of the combustion-supporting air input pipe 4 is connected to the gas outlet 6-2, and the gas outlet 6-2 is arranged on the rotor. Because the axis of the rotor coincides with the center line a of the kiln body 1, the combustion-supporting air input pipe 4 drives the gas outlet 6-2 and the rotor to swing synchronously, while the gas inlet 6-3 and the stator 6-1 connected to the combustion-supporting air supply device are fixed in position and will not rotate synchronously. It is ensured that the combustion-supporting air can be continuously provided to the burner during the swinging process of the kiln body 1.

[0031] The fuel input pipeline 5 and the combustion-supporting air input pipeline 4 are implemented based on hard pipelines, so they can rotate synchronously with the kiln body 1.

[0032] The rotation axes of the auxiliary fuel rotary joint 7 and the combustion air rotary joint 6 coincide with the swing axis, and the fuel input pipe 5 and the combustion air input pipe 4 are respectively connected to the outlets on the rotors of the rotary joints, ensuring that the fuel input pipe 5 and the combustion air input pipe 4 can rotate synchronously with the kiln body without falling off from the fuel outlet and gas outlet of the auxiliary fuel rotary joint 7 and the combustion air rotary joint 6.

[0033] In specific implementation, the kiln body 1 is divided into multiple detection areas along the length direction, and at least one temperature detection device 3 is set in each detection area; the temperature detection device 3 and the burner 2 are matched, and each temperature detection device 3 is matched with at least one burner 2; the position and number of burners can be reasonably designed and arranged according to the specifications of the kiln and the production process requirements.

[0034] Figure 1In the embodiment, each temperature detection decoration 3 is equipped with a burner 2, and at least one temperature detection device 3 is set on each detection area based on multiple detection areas. Once the temperature in a detection area is detected to be too high or too low, the burner 2 in the area can be adjusted to adjust the temperature of the area, thereby ensuring that the temperature of the kiln body 1 can be controlled in different areas, and the temperature of the entire kiln body 1 can be accurately controlled. It can also be based on the existing PLC technology and cooperate with the temperature detection facilities of each section for interlocking control, which is convenient for production process adjustment and control.

[0035] The swing drive structure 8 is implemented based on a motor; specifically, the swing control of the kiln body 1 can be realized based on the structure in the prior art. In this embodiment, a gear 8-1 is set on the output shaft of the motor, and a gear ring 1-6 is set on the outer wall of the kiln body 1, and the gear 8-1 is meshed and connected with the gear ring 1-6. The number of swing drive structures 8 is greater than or equal to 1, and the specific number and setting position are set according to the specific size of the kiln body 1. In conjunction with the existing automatic control technology, a self-switching swing drive device. In this embodiment, the kiln body can reach a maximum reciprocating swing angle range of 150°.

[0036] The swing sintering kiln of the present application has the advantages of both a rotary kiln (stirring heat transfer) and a tunnel kiln (stage-controlled temperature), and has strong adaptability to materials; at the same time, it fully avoids the disadvantages of the above two types of furnaces, and simultaneously realizes the precise temperature control and tumbling and stirring effects.

Claims

1. A swing type sintering kiln capable of precise temperature control, comprising: Kiln body, burner, temperature detection device, auxiliary fuel input structure and combustion-supporting air input structure; A feed inlet and a discharge outlet are respectively arranged at two ends of the kiln body, and the feed inlet and the discharge outlet are respectively connected to the inner cavity of the kiln body; The invention is characterized in that it further comprises: a swing driving structure, under the drive of the swing driving structure, the kiln body performs reciprocating swing from the kiln head to the kiln tail with the kiln body center line as the swing axis; The burner and the temperature detection device are fixedly mounted on the kiln body; The auxiliary fuel input structure comprises: a fuel input pipeline and a rotary joint for auxiliary fuel; The combustion-supporting air input structure comprises: a combustion-supporting air input pipeline and a combustion-supporting air rotary joint; The fuel input pipeline and the combustion-supporting air input pipeline are realized based on hard fixed pipelines; one end of the fuel input pipeline is connected to the burner, and the other end is connected to the rotor of the auxiliary fuel rotary joint; one end of the combustion-supporting air input pipeline is connected to the burner, and the other end is connected to the rotor of the combustion-supporting air rotary joint; The rotation axes of the auxiliary fuel rotary joint and the combustion-supporting air rotary joint coincide with the swing axis; The fuel outlet of the auxiliary fuel rotary joint is connected to the fuel input pipeline, and the fuel inlet is connected to the fuel supply equipment; The gas outlet of the combustion-supporting air rotary joint is connected to the combustion-supporting air input pipeline, and the gas inlet is connected to the combustion-supporting air supply equipment.

2. The swing type sintering kiln capable of precise temperature control according to claim 1, characterized in that: The kiln body is divided into a plurality of detection areas along the length direction, and each detection area is provided with at least one temperature detection device; the temperature detection device and the burner are provided in a matching manner, and each temperature detection device is provided with at least one burner.

3. The swing type sintering kiln capable of precise temperature control according to claim 1, characterized in that: It also includes: a fume outlet, a kiln head cover and a kiln tail cover, wherein the kiln head cover and the kiln tail cover are respectively arranged at two ends of the kiln body; The feed port and the smoke outlet are located on the kiln head cover, the feed port is located on the kiln head cover panel, and the smoke outlet is located on the top side of the kiln head cover; the discharge port is located at the bottom of the kiln tail cover.

4. The swing type sintering kiln capable of precise temperature control according to claim 1, characterized in that: The swing drive structure is implemented based on a motor; and the number of the swing drive structures is greater than or equal to 1.

5. The swing type sintering kiln capable of precise temperature control according to claim 3, characterized in that: The kiln body is arranged tilted, and the kiln head cover and the kiln tail cover are respectively located at the high end and the low end.

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