Automatic hot air oven device of rotary kiln

Abstract

The utility model relates to the technical field of oven devices, and particularly discloses an automatic hot air oven device of a rotary kiln. The combustion-supporting assembly comprises a combustion chamber, a combustor is arranged at one end of the combustion chamber, a first combustion nozzle and a second combustion nozzle are arranged at the end, close to the combustion chamber, of the combustor, and the diameter of the first combustion nozzle is smaller than that of the second combustion nozzle; the combustor, the combustion-supporting assembly and the air return assembly are electrically connected with the control system. When the fuel flow is adjusted according to the temperature in the rotary kiln, the control system adjusts the air introduction amount of the combustion-supporting assembly and the air return assembly, the combustion-supporting assembly mixes air and fuel in the combustor, the air return assembly further improves the disorder degree in the combustion chamber, the fuel is fully combusted, and whether the combustor flames out or not is detected through the flame detector; supply or stop of fuel and air is adjusted in time, and the drying efficiency of the rotary kiln is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to a furnace drying device technical field, especially in kind of automatic hot -blast furnace drying device of rotary kiln. BACKGROUND

[0002] Rotary kiln is a kind of device for hazardous waste disposal or sintering cement clinker and light aggregate, rotary kiln needs to be dried before being put into use to reduce the phenomenon that rotary kiln inside cracks and falls in the use process.

[0003] In prior art, the inside of rotary kiln is dried by hot blast furnace, the hot blast furnace adjusts the air volume by centrifugal fan, adjusts the natural gas amount by electromagnetic flow regulating valve, and provides hot flue gas by the heat energy released by natural gas burner combustion, and the hot gas generated is used to dry rotary kiln.In the drying process, the staff controls the flow of natural gas and the air volume by valve according to the drying condition, and the phenomenon of flameout is prone to occur, if the personnel do not find in time, the unburned fuel will enter the mixed combustion chamber cavity in large quantities from the burner, resulting in the increase of natural gas consumption, and the phenomenon of explosion is prone to occur when re-ignition, at this time, the burner and centrifugal fan can be started again only after the natural gas in rotary kiln is exhausted, which affects the drying efficiency of rotary kiln. UTILITY MODEL CONTENTS

[0004] In order to overcome the shortcomings of the prior art, the purpose of the utility model is to provide a kind of automatic hot blast furnace drying device of rotary kiln, to improve the drying efficiency of rotary kiln.

[0005] The technical scheme adopted by the utility model is:

[0006] A kind of automatic hot blast furnace drying device of rotary kiln, including combustion chamber, characterized by, one end of the combustion chamber is provided with burner, the other end of the combustion chamber is provided with hot flue gas duct communicated with rotary kiln, the burner, combustion chamber and rotary kiln are sealed communication, the one end of the burner close to the combustion chamber is provided with first combustion nozzle and second combustion nozzle, the diameter of the first combustion nozzle is less than the diameter of the second combustion nozzle, the first combustion nozzle and second combustion nozzle are connected with first fuel pipeline and second fuel pipeline respectively, combustion chamber is provided with combustion-supporting assembly for air inlet, the combustion chamber is provided with air return assembly for improving the gas turbulence degree in combustion chamber, one side of the combustion chamber is provided with control system for controlling fuel flow, combustion-supporting assembly and air flow of air return assembly, the burner, combustion-supporting assembly and air return assembly are electrically connected with control system respectively.

[0007] Optionally, the combustion assembly comprises a combustion fan and a combustion pipeline, a connecting pipe is arranged between the burner and the combustion chamber, an air duct is arranged on the burner, the air outlet of the combustion fan is connected with one end of the combustion pipeline, and the air outlet of the combustion pipeline penetrates the outer periphery of the connecting pipe and communicates with the air duct.

[0008] Optionally, the return air assembly comprises a return air fan and a return air pipeline, the air outlet of the return air fan is connected with the return air pipeline, and the air outlet of the return air pipeline penetrates the outer periphery of the combustion chamber and extends into the combustion chamber.

[0009] Optionally, a first conical air duct is arranged on the end of the combustion chamber close to the burner, the diameter of the first conical air duct gradually increases in the direction close to the combustion chamber, and the return air assembly is arranged on the first conical air duct.

[0010] Optionally, the diameter of the first fuel pipeline is smaller than the diameter of the second fuel pipeline, a fuel flow adjusting valve for adjusting the fuel flow and a fuel flow meter for detecting the fuel flow are respectively arranged on the first fuel pipeline and the second fuel pipeline, and the fuel flow adjusting valve and the fuel flow meter are respectively electrically connected with the control system.

[0011] Optionally, a flame detector is arranged on the inner wall of the combustion chamber, the flame detector is electrically connected with the control system, and the control system adjusts or stops the fuel supply in the first fuel pipeline and the second fuel pipeline according to the signal of the flame detector.

[0012] Optionally, a first air flow meter for detecting the air flow of the combustion assembly is arranged on the combustion assembly, a second air flow meter for detecting the air flow of the return air assembly is arranged on the return air assembly, and the first air flow meter and the second air flow meter are respectively electrically connected with the control system.

[0013] Optionally, a plurality of temperature sensors are arranged in the rotary kiln, the plurality of temperature sensors are electrically connected with the control system, when the temperature in the rotary kiln is 0-30% of the set temperature, the fuel and air mixture enters the combustion chamber through the first combustion nozzle to start combustion, when the temperature in the rotary kiln is 30-60% of the set temperature, the fuel and air mixture enters the combustion chamber through the second combustion nozzle to start combustion, and when the temperature in the rotary kiln is 60-100% of the set temperature, the fuel and air mixture enters the combustion chamber through the first combustion nozzle and the second combustion nozzle to start combustion.

[0014] Optionally, the ratio of the fuel to air is 12-18:1.

[0015] The utility model discloses a beneficial effect lies in: according to the temperature regulation fuel flow in rotary kiln, control system adjusts the air inlet of combustion support component and air return component simultaneously, combustion support component mixes air and fuel in combustor, and air return component further improves the chaos degree in combustion chamber, makes fuel fully burn, detects whether combustor is extinguished through flame detector, and timely adjusts the supply or stop of fuel and air, improves the drying efficiency of rotary kiln. BRIEF DESCRIPTION OF DRAWINGS

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

[0017] Fig. 2 It is structure schematic diagram of combustor of the utility model.

[0018] The corresponding of the label and name in drawing are as follows: 1, combustion chamber;2, combustor;21, air duct;3, hot flue gas guide pipe;41, first combustion nozzle;42, second combustion nozzle;43, first fuel pipeline;44, second fuel pipeline;5, combustion support component;51, combustion fan;52, combustion pipeline;6, connecting pipe;7, air return component;71, air return fan;72, air return pipeline;8, first conical air duct;9, second conical air duct. DETAILED DESCRIPTION

[0019] The technical scheme in the embodiments of the utility model will be described clearly and completely below in combination with the drawings in the embodiments of the utility model, and obviously, the described embodiments only are a part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by the ordinary skill in the art without making creative labor all belong to the range of protection of the utility model.

[0020] Please refer to Figs. 1-2 The utility model provides a technical scheme:

[0021] The utility model provides an automatic hot air baking device of rotary kiln, including frame and the combustion chamber 1 of setting on the frame, one end of combustion chamber 1 is provided with burner 2, the other end of combustion chamber 1 is provided with the hot flue gas pipe 3 in sealed communication with rotary kiln, and the first conduit second conduit and third conduit are sequentially and sealingly connected along the gas flue gas flow direction of hot flue gas pipe 3, the first conduit is horizontally arranged with the third conduit, and the included angle between the second conduit and the first conduit and the third conduit is greater than 90 DEG, the first combustion nozzle 41 and the second combustion nozzle 42 are arranged at the end of burner 2 close to combustion chamber 1, the diameter of first combustion nozzle 41 is less than the diameter of second combustion nozzle 42, and the first fuel pipe 43 and the second fuel pipe 44 are sealingly connected with the first combustion nozzle 41 and the second combustion nozzle 42 away from the end of combustion chamber 1 respectively, the diameter of first fuel pipe 43 is less than the diameter of second fuel pipe 44, and the fuel flow regulating valve for adjusting fuel flow and the fuel flow meter for detecting fuel flow are arranged on the first fuel pipe 43 and the second fuel pipe 44 respectively, the fuel flow regulating valve includes the first fuel flow regulating valve arranged on the first fuel pipe 43 and the second flow regulating valve arranged on the second fuel pipe 44, the control system for controlling the fuel flow, combustion-supporting assembly 5 and air flow of return air assembly 7 is arranged at one side of combustion chamber 1, and the first fuel flow regulating valve, the second fuel flow regulating valve and the two fuel flow meters are electrically connected with the control system.

[0022] With reference to Figs. 1-2 Combustion-supporting assembly 5 for introducing air is arranged between combustion chamber 1 and burner 2, and connecting pipe 6 is arranged between burner 2 and combustion chamber 1, one end of connecting pipe 6 is sleeved on the outer periphery of burner 2 and is sealingly connected with the outer periphery of burner 2, the other end of connecting pipe 6 is sealingly connected with combustion chamber 1, the first fuel pipe 43 and the second fuel pipe 44 are arranged at the end of burner 2 away from connecting pipe 6, the first combustion nozzle 41 and the second combustion nozzle 42 are arranged on the axis of combustion chamber 1 at intervals in the vertical direction, combustion-supporting assembly 5 includes combustion-supporting fan 51 and combustion-supporting pipe 52 connected with combustion-supporting fan 51, and air duct 21 is arranged at the bottom of burner 2, combustion-supporting fan 51 is installed on the frame, the air outlet of combustion-supporting fan 51 is sealingly connected with one end of combustion-supporting pipe 52, and the air outlet of combustion-supporting pipe 52 penetrates the outer periphery of connecting pipe 6 in the horizontal direction and is connected with air duct 21.

[0023] With reference to Fig. 1, the air inlet of the combustion chamber 1 is provided with a first conical duct 8, the diameter of the first conical duct 8 gradually increases along the direction of the combustion chamber 1, the two ends of the first conical duct 8 are respectively in sealing communication with the air outlet of the connecting pipe 6 and the air inlet of the combustion chamber 1, the first conical duct 8 is provided with a return air assembly 7 for improving the gas turbulence degree in the combustion chamber 1, the return air assembly 7 comprises a return air fan 71 and a return air duct 72, the return air fan 71 is installed on the rack, the air outlet of the return air fan 71 is in sealing communication with the return air duct 72, the air outlet of the return air duct 72 penetrates the outer periphery of the first conical duct 8 along the horizontal direction and extends on the axis of the combustion chamber 1, the end of the connecting pipe 6 away from the burner 2 extends to the air outlet of the return air duct 72; the air outlet of the combustion chamber 1 is provided with a second conical duct 9, the diameter of the second conical duct 9 gradually decreases along the direction away from the combustion chamber 1, the two ends of the second conical duct 9 are respectively in sealing communication with the combustion chamber 1 and the hot flue gas duct 3.

[0024] The combustion supporting pipe 52 is provided with a first air flow meter for detecting the air flow of the combustion supporting assembly 5, the return air duct 72 is provided with a second air flow meter for detecting the air flow of the return air assembly 7, the first air flow meter and the second air flow meter are respectively electrically connected with the control system, and the first air flow meter and the second air flow meter display the real-time flow of air.

[0025] Referring to Figs. 1-2 , a plurality of temperature sensors are arranged in the rotary kiln, the plurality of sensors are uniformly distributed in the front, middle and rear sections of the rotary kiln, the plurality of temperature sensors are electrically connected with the control system and a multi-thread temperature recorder, the multi-thread temperature recorder displays the temperature in the rotary kiln in real time, the control system controls the valve opening degree of the fuel flow regulating valve to control the size of the fuel flow, when the temperature in the rotary kiln is 0-30% of the set temperature, the fuel mixed with air enters the combustion chamber 1 through the first combustion nozzle 41 to start combustion; when the temperature in the rotary kiln is 30-60% of the set temperature, the fuel mixed with air enters the combustion chamber 1 through the second combustion nozzle 42 to start combustion; when the temperature in the rotary kiln is 60-100% of the set temperature, the fuel mixed with air enters the combustion chamber 1 through the first combustion nozzle 41 and the second combustion nozzle 42 to start combustion; the control system adjusts the frequency of the combustion supporting fan 51, the frequency of the return air fan 71 and the fuel flow regulating valve according to the temperature detected by the temperature sensor, and adjusts the ratio of fuel to air to be 12-18:1 according to the real-time air flow, the fuel flow and the real-time temperature in the rotary kiln.

[0026] The inner wall of the combustion chamber 1 is provided with a flame detector, the flame detector is electrically connected with a control system, the control system adjusts or stops the fuel supply in the first fuel pipe 43 and the second fuel pipe 44 through the signal of the flame detector, an alarm is arranged on the control system, when the flame detector detects that the flame is extinguished, the control system closes the first fuel flow regulating valve and the second fuel flow regulating valve alone or all, and starts the alarm to give an alarm, so that the staff can timely remove the fault of the hot air oven device and then reopen the first fuel flow regulating valve and the second fuel flow regulating valve.

[0027] Finally, it should be noted that: the above only for the preferred examples of the present application have, and not for limiting the present application, although the present application is described in detail with reference to the foregoing examples, for those skilled in the art, it still can be modified, or part of the technical features of the equivalent replacement. Any modification, equivalent replacement, improvement, etc. within the spirit and principles of the present application, should be included in the scope of protection of the present application.

Claims

1. A rotary kiln automated hot air oven device comprising a combustion chamber (1), characterized in that, One end of the combustion chamber (1) is provided with a burner (2), the other end of the combustion chamber (1) is provided with a hot flue gas duct (3) communicated with a rotary kiln, the burner (2), the combustion chamber (1) and the rotary kiln are sealed and communicated, the burner (2) is provided with a first combustion nozzle (41) and a second combustion nozzle (42) near one end of the combustion chamber (1), the diameter of the first combustion nozzle (41) is smaller than that of the second combustion nozzle (42), the first combustion nozzle (41) and the second combustion nozzle (42) are connected with a first fuel pipe (43) and a second fuel pipe (44) respectively, the burner (2) is provided with a combustion supporting assembly (5) for air inlet, the combustion chamber (1) is provided with a return air assembly (7) for improving the gas turbulence degree in the combustion chamber (1), one side of the combustion chamber (1) is provided with a control system for controlling the fuel flow, the combustion supporting assembly (5) and the air flow of the return air assembly (7), the burner (2), the combustion supporting assembly (5) and the return air assembly (7) are electrically connected with the control system respectively.

2. The automatic hot air oven device for rotary kiln according to claim 1, characterized in that, The combustion supporting assembly (5) comprises a combustion supporting fan (51) and a combustion supporting pipe (52), a connecting pipe (6) is arranged between the burner (2) and the combustion chamber (1), the burner (2) is provided with an air duct (21), the air outlet of the combustion supporting fan (51) is connected with one end of the combustion supporting pipe (52), the air outlet of the combustion supporting pipe (52) penetrates the outer periphery of the connecting pipe (6) and communicates with the air duct (21).

3. The automatic hot air oven device for rotary kiln according to claim 1, characterized in that, The return air assembly (7) comprises a return air fan (71) and a return air pipe (72), the air outlet of the return air fan (71) is connected with the return air pipe (72), the air outlet of the return air pipe (72) penetrates the outer periphery of the combustion chamber (1) and extends into the combustion chamber (1).

4. The automatic hot air oven device for rotary kiln according to claim 1, characterized in that, The combustion chamber (1) is provided with a first conical air duct (8) near one end of the burner (2), the diameter of the first conical air duct (8) gradually increases along the direction close to the combustion chamber (1), and the return air assembly (7) is arranged on the first conical air duct (8).

5. The automatic hot air oven device for rotary kiln according to claim 1, characterized in that, The diameter of the first fuel pipe (43) is smaller than that of the second fuel pipe (44), the first fuel pipe (43) and the second fuel pipe (44) are respectively provided with a fuel flow regulating valve for regulating the fuel flow and a fuel flow meter for detecting the fuel flow, and the fuel flow regulating valve and the fuel flow meter are electrically connected with the control system respectively.

6. The automatic hot air oven device for rotary kiln according to claim 1, characterized in that, The inner wall of the combustion chamber (1) is provided with a flame detector, the flame detector is electrically connected with the control system, and the control system adjusts the fuel supply or stops in the first fuel pipe (43) and the second fuel pipe (44) through the signal of the flame detector.

7. The automatic hot air oven device for rotary kiln according to claim 1, characterized in that, The combustion supporting assembly (5) is provided with a first air flow meter for detecting the air flow of the combustion supporting assembly (5), the return air assembly (7) is provided with a second air flow meter for detecting the air flow of the return air assembly (7), and the first air flow meter and the second air flow meter are electrically connected with the control system respectively.

8. The automatic hot air oven device for rotary kiln according to claim 1, characterized in that, The rotary kiln is provided with a plurality of temperature sensors, and the plurality of temperature sensors are electrically connected with a control system; when the temperature in the rotary kiln is 0-30% of the set temperature, the fuel mixed with air enters the combustion chamber (1) through the first combustion nozzle (41) to start combustion; when the temperature in the rotary kiln is 30-60% of the set temperature, the fuel mixed with air enters the combustion chamber (1) through the second combustion nozzle (42) to start combustion; when the temperature in the rotary kiln is 60-100% of the set temperature, the mixture of the fuel and air enters the combustion chamber (1) through the first combustion nozzle (41) and the second combustion nozzle (42) to start combustion.

9. The automatic hot air oven device for rotary kiln according to claim 1, characterized in that, The ratio of the fuel to air is 12-18:1.

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