Combustion system for burning concentrated solution in rotary kiln

Abstract

The utility model discloses a combustion system for incinerating concentrated liquid in a rotary kiln. The combustion system comprises an auxiliary fuel tank, a fuel storage tank, a combustor and a fan, a feeding port of the fuel storage tank is communicated with a feeding pipeline, an auxiliary fuel nozzle, an electronic ignition electrode, an oil nozzle and a first air nozzle are arranged in the combustor, the electronic ignition electrode is electrically connected with the control cabinet, and outlets of the auxiliary fuel nozzle, the oil nozzle and the first air nozzle face the outlet end of the combustor; an outlet of the auxiliary fuel tank is communicated with an inlet of the auxiliary fuel spray head through an auxiliary fuel pipeline, an outlet of the fuel storage tank is communicated with an inlet of the fuel spray nozzle through a fuel conveying pipeline, and a first filter, an oil conveying pump, a fuel adjusting valve, a first pressure gauge and a second filter are sequentially arranged on the fuel conveying pipeline in the fuel conveying direction. And an outlet of the fan is communicated with an inlet of the first air nozzle through a first air supply pipeline.

Description

Technical field:

[0001] The utility model relates to the technical field of rotary kiln incineration, in particular to a combustion system used for rotary kiln incineration of concentrated liquid. Background technology:

[0002] In the process of solid waste incineration, the solid waste is generally sent to the hot plate furnace for incineration, the flue gas and fine particles generated by the incineration enter the decomposition furnace for high-temperature decomposition, and the incineration slag enters the rotary kiln for calcination into cement clinker. The dust-removed kiln tail gas and the dechlorinated flue gas are discharged from the chimney in compliance with the standards, the odor and leachate are treated and discharged in compliance with the standards, and the concentrated liquid generated by the leachate treatment is sent to the rotary kiln through the coal-injected burner for further incineration.

[0003] The traditional coal-injection burner is a coal-fired burner. During the high-temperature combustion of coal, coal tar will be produced. Since coal tar has a high temperature and is sticky, it will be deposited and adhered to the surface of the refractory bricks. During the high-speed air blowing process, the coal tar adhered to the surface of the refractory bricks will carry the surface of the refractory bricks and be blown into the incinerator along the inner wall of the coal-fired burner. Over time, the surface of the refractory bricks will be destroyed and the refractory materials will gradually become thinner. In addition, when the coal quality is not good, the amount of coal tar produced will increase. The high-temperature coal tar will be deposited inside the coal-fired burner and accumulate on the refractory bricks, which is easy to scale and coke, occupying the effective outlet area of ​​the coal-fired burner, and the refractory materials need to be replaced frequently, which has low operating efficiency and high costs. Utility model content:

[0004] The utility model aims to provide a combustion system for incinerating concentrated liquid in a rotary kiln.

[0005] The purpose of the utility model is implemented by the following technical scheme: a combustion system for incinerating concentrated liquid in a rotary kiln, which includes an auxiliary fuel tank, a fuel storage tank, a burner and a fan; the feed port of the fuel storage tank is connected with a feed pipeline, and the burner is provided with an auxiliary fuel nozzle, an electronic ignition electrode, a fuel nozzle and a first air nozzle, the electronic ignition electrode is electrically connected to the control cabinet, and the outlets of the auxiliary fuel nozzle, the fuel nozzle and the first air nozzle are all arranged toward the outlet end of the burner; the outlet of the auxiliary fuel tank is connected to the inlet of the auxiliary fuel nozzle through an auxiliary fuel pipeline, the outlet of the fuel storage tank is connected to the inlet of the fuel nozzle through a fuel delivery pipeline, and the outlet of the fan is connected to the inlet of the first air nozzle through a first air supply pipeline.

[0006] Preferably, a first filter, a fuel pump, a fuel regulating valve, a first pressure gauge and a second filter are sequentially arranged on the fuel delivery pipeline along the fuel delivery direction.

[0007] Preferably, the outlet of the oil delivery pump is also connected to the feed pipeline via a reflux pipeline.

[0008] Preferably, a second air nozzle is further provided in the burner, a second air supply pipeline is connected to the first air supply pipeline, and an outlet of the second air supply pipeline is connected to an inlet of the second air nozzle.

[0009] Preferably, swirlers are installed at the outlets of the fuel injection nozzle, the first air nozzle and the second air nozzle in the burner.

[0010] Preferably, a temperature sensor is provided at the outlet end of the burner.

[0011] Preferably, the bottom of the burner is placed on a movable supporting platform.

[0012] Preferably, an air purifier is installed at the inlet of the fuel storage tank.

[0013] Preferably, a liquid level gauge is provided on the fuel storage tank.

[0014] The advantages of the utility model are as follows: first, the utility model provides auxiliary fuel to the burner through an auxiliary fuel tank, provides fuel oil to be burned into the burner through a fuel storage tank, ignites the auxiliary fuel through electric sparks generated by high-voltage discharge through an electronic ignition electrode, ignites the fuel oil to be burned through the ignited auxiliary fuel, provides dry high-pressure air to the burner through a fan, and after the gas and fuel are fully mixed and burned in a cyclone, they are sprayed into the incineration kiln body from the outlet of the burner. The fuel oil will not produce tar, scale or coke during the combustion process, and will not corrode or damage refractory materials, and there is no need to frequently replace refractory materials.

[0015] Second, compared with traditional coal-fired burners, the burner in the utility model is a short-diameter burner, the length of the combustion chamber is shortened by one third and the diameter is reduced by half. Compared with traditional coal-fired burners, it is conducive to gathering heat and powerfully outputting fuel for combustion.

[0016] Third, the utility model delivers dry high-pressure air into the burner through the fan, and is sprayed out by the first air nozzle and the second air nozzle. Under the action of the swirler, the air and fuel are fully mixed to form a spiral vortex, which is sprayed along the inner wall of the burner to the incineration kiln body to ensure full combustion of the fuel. Description of the drawings:

[0017] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creativity and labor.

[0018] Figure 1 It is a structural schematic diagram of the utility model.

[0019] The components in the accompanying drawings are marked as follows: auxiliary fuel tank 1, fuel storage tank 2, burner 3, fan 4, air purifier 5, liquid level gauge 6, auxiliary fuel nozzle 7, electronic ignition electrode 8, fuel injector 9, first air nozzle 10, second air nozzle 11, control cabinet 12, cyclone 13, temperature sensor 14, support platform 15, feed pipeline 16, auxiliary fuel pipeline 17, fuel delivery pipeline 18, first filter 19, oil pump 20, fuel regulating valve 21, first pressure gauge 22, second filter 23, reflux pipeline 24, first air supply line 25, second air supply line 26, gas regulating valve 27, second pressure gauge 28. Specific implementation method:

[0020] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. 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.

[0021] like Figure 1 As shown, a combustion system for rotary kiln incineration of concentrated liquid includes an auxiliary fuel tank 1, a fuel storage tank 2, a burner 3 and a fan 4, the auxiliary fuel tank 1 is used to store auxiliary fuel, and the fuel storage tank 2 is used to store fuel oil to be incinerated; the burner 3 is an existing device, the manufacturer is: Huayi Microelectronics Co., Ltd., the specific structure is not repeated here, a feed port is opened on the top of the fuel storage tank 2, the feed port of the fuel storage tank 2 is connected with a feed pipeline 16, the bottom end of the feed pipeline 16 extends into the fuel storage tank 2, 20 cm away from the bottom surface of the fuel storage tank 2, and fuel oil is added to the fuel storage tank 2 through the feed pipeline 16; an air purifier 5 is also installed on the top of the fuel storage tank 2, when adding fuel to the fuel storage tank 2, the volatilized fuel is adsorbed and purified by the air purifier 5 to avoid polluting the environment; a liquid level gauge 6 is provided on the fuel storage tank 2, and the liquid level gauge 6 can display the liquid level in the tank fuel for easy observation;

[0022] The burner 3 is provided with an auxiliary fuel nozzle 7, an electronic ignition electrode 8, an oil nozzle 9, a first air nozzle 10 and a second air nozzle 11. The outlets of the auxiliary fuel nozzle 7, the oil nozzle 9, the first air nozzle 10 and the second air nozzle 11 are all arranged toward the outlet end of the burner 3. The electronic ignition electrode 8 is electrically connected to the control cabinet 12. The electronic ignition electrode 8 ignites the auxiliary fuel by the electric spark generated by high-voltage discharge, and ignites the fuel oil to be burned by igniting the auxiliary fuel. A swirler 13 is installed at the outlet of the oil nozzle 9, the first air nozzle 10 and the second air nozzle 11 in the burner 3. Driven by the gas, the fuel passes through the swirler 13 and is evenly distributed in the burner 3. A temperature sensor 14 is provided at the outlet end of the burner 3. The temperature sensor 14 can display the combustion temperature at the outlet of the burner 3 and is used to monitor the temperature range. The bottom of the burner 3 is placed on a movable support platform 15, and the outlet end of the burner 3 is extended into the incineration kiln body by moving the support platform 15.

[0023] The outlet of the auxiliary fuel tank 1 is connected with an auxiliary fuel pipeline 17, which passes through the outer wall of the burner 3 and is connected with the inlet of the auxiliary fuel nozzle 7. A switch valve is provided on the auxiliary fuel pipeline 17, and auxiliary fuel is provided to the burner 3 through the auxiliary fuel tank 1, and the auxiliary fuel is sprayed out by the auxiliary fuel nozzle 7; the outlet of the fuel storage tank 2 is connected with a fuel delivery pipeline 18, which passes through the outer wall of the burner 3 and is connected with the inlet of the fuel injection nozzle 9. A first filter 19, a fuel delivery pump 20, a fuel regulating valve 21, a first pressure gauge 22 and a first pressure gauge 23 are provided on the fuel delivery pipeline 18 in sequence along the fuel delivery direction. The second filter 23 provides fuel to the burner 3 through the oil pump 20 and the fuel delivery pipeline 18, and the fuel is sprayed out by the fuel injector 9; the impurities in the fuel are filtered out in sequence by the first filter 19 and the second filter 23 to prevent the impurities from clogging the fuel injector 9; the fuel regulating valve 21 can adjust the fuel flow; the first pressure gauge 22 can display the pressure of the fuel oil output by the oil pump 20; the outlet of the oil pump 20 is also connected to the middle part of the feed pipeline 16 through the return pipeline 24, and a switch valve is provided on the return pipeline 24. When the fuel delivery pipeline 18 needs to be inspected and depressurized, the fuel returns to the fuel storage tank 2 through the return pipeline 24;

[0024] The outlet of the fan 4 is connected to a first air supply pipeline 25, which passes through the outer wall of the burner 3 and is connected to the first air nozzle 10. Dry high-pressure air is provided to the first air supply pipeline 25 through the fan 4 and is sprayed out by the first air nozzle 10. The first air supply pipeline 25 is connected to a second air supply pipeline 26, and the outlet of the second air supply pipeline 26 is connected to the inlet of the second air nozzle 11. The second air supply pipeline 26 and the second air nozzle 11 are used as spare components. Gas regulating valves 27 are respectively provided on the first air supply pipeline 25 and the second air supply pipeline 26; a switch valve and a second pressure gauge 28 are provided on the first air supply pipeline 25 near the outlet of the fan 4, and the second pressure gauge 28 can display the gas pressure in the air supply pipeline.

[0025] Working process: First, move the support platform 15 so that the outlet end of the burner 3 extends into the incineration kiln body; second, open the switch valve on the auxiliary fuel pipeline 17, and the auxiliary fuel in the auxiliary fuel tank 1 enters the burner 3 through the auxiliary fuel pipeline 17 and is sprayed out by the auxiliary fuel nozzle 7; the electronic ignition electrode 8 is controlled by the control cabinet 12 to ignite the auxiliary fuel using the electric spark generated by high-voltage discharge; third, start the oil pump 20, and the fuel in the fuel storage tank 2 enters the burner 3 through the fuel delivery pipeline 18 and is sprayed out by the fuel nozzle 9. The burning auxiliary fuel ignites the fuel oil to be burned; fourth, the switch valve on the first air supply pipeline 25 is opened, and the fan 4 provides dry high-pressure air, which enters the burner 3 through the first air supply pipeline 25 and the second air supply pipeline 26, and is sprayed out by the first air nozzle 10 and the second air nozzle 11. After the gas and fuel are fully mixed and burned through the swirler 13, they are sprayed out from the outlet of the burner 3 into the incineration kiln body; fifth, after the fuel is ignited, the control cabinet 12 controls the electronic ignition electrode 8 to be closed, and closes the switch valve on the auxiliary fuel pipeline 17.

[0026] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. 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 combustion system for incinerating concentrated liquid in a rotary kiln, characterized in that: It includes an auxiliary fuel tank, a fuel storage tank, a burner and a fan; the feed port of the fuel storage tank is connected with a feed pipeline, the burner is provided with an auxiliary fuel nozzle, an electronic ignition electrode, a fuel nozzle and a first air nozzle, the electronic ignition electrode is electrically connected to the control cabinet, and the outlets of the auxiliary fuel nozzle, the fuel nozzle and the first air nozzle are all arranged toward the outlet end of the burner; the outlet of the auxiliary fuel tank is connected with the inlet of the auxiliary fuel nozzle through an auxiliary fuel pipeline, the outlet of the fuel storage tank is connected with the inlet of the fuel nozzle through a fuel delivery pipeline, and the outlet of the fan is connected with the inlet of the first air nozzle through a first air supply pipeline.

2. A combustion system for rotary kiln incineration of concentrated liquid according to claim 1, characterized in that: A first filter, a fuel pump, a fuel regulating valve, a first pressure gauge and a second filter are sequentially arranged on the fuel delivery pipeline along the fuel delivery direction.

3. A combustion system for rotary kiln incineration of concentrated liquid according to claim 2, characterized in that: The outlet of the oil delivery pump is also connected to the middle of the feed pipeline through a return pipeline.

4. A combustion system for rotary kiln incineration of concentrated liquid according to any one of claims 1 to 3, characterized in that: A second air nozzle is also provided in the burner. The first air supply pipeline is connected to a second air supply pipeline, and the outlet of the second air supply pipeline is connected to the inlet of the second air nozzle.

5. A combustion system for rotary kiln incineration of concentrated liquid according to claim 4, characterized in that: Swirlers are installed at the outlets of the oil injection nozzle, the first air nozzle and the second air nozzle in the burner.

6. A combustion system for rotary kiln incineration of concentrated liquid according to claim 5, characterized in that: A temperature sensor is provided at the outlet end of the burner.

7. A combustion system for rotary kiln incineration of concentrated liquid according to claim 1 or 6, characterized in that: The bottom of the burner is placed on a movable supporting platform.

8. A combustion system for rotary kiln incineration of concentrated liquid according to claim 1, characterized in that: An air cleaner is installed at the inlet of the fuel storage tank.

9. A combustion system for rotary kiln incineration of concentrated liquid according to claim 7, characterized in that: A liquid level gauge is provided on the fuel storage tank.

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