New-type waste activated carbon incinerator

Abstract

A waste activated carbon incinerator, which is formed by means of multiple stages of rotary kilns (1) connected in series with each other, wherein the rotary kiln (1) at the foremost end is connected to a waste activated carbon feeding system, a tail portion of the rotary kiln (1) at the rearmost end is connected to a spiral slag discharger (2), and every two adjacent rotary kilns (1) are in communication by means of a spiral feeder (3).

Description

A new type of waste activated carbon incinerator Technical Field

[0001] The present application relates to the field of waste activated carbon treatment equipment, and in particular to a new type of waste activated carbon incinerator. Background Art

[0002] As we all know, the disposal of non-renewable waste activated carbon has become a major challenge in the industry. According to incomplete statistics, the national disposal volume of non-renewable waste activated carbon will reach 930,000 tons by 2025. Currently, there is no effective method for the disposal of non-renewable waste activated carbon. Conventional incineration methods fail to meet national standards for the thermal reduction rate of waste activated carbon incineration residues, failing to achieve the goal of reducing hazardous waste disposal. Furthermore, the incineration process consumes a large amount of fuel. Therefore, there is an urgent need to develop a device for the disposal of non-renewable waste activated carbon to meet market demand. Summary of the Invention

[0003] The present application provides a new type of waste activated carbon incinerator, the purpose of which is to effectively ensure that the thermal reduction rate of waste activated carbon can stably meet the standards, thereby achieving environmental protection and energy saving.

[0004] The present application provides a novel waste activated carbon incinerator, which adopts the following technical solution: a novel waste activated carbon incinerator is composed of multiple stages of rotary kilns connected in series, the rotary kiln at the front end is connected to the waste activated carbon feeding system, the rear end of the rotary kiln at the end end is connected to a spiral slag discharger, and adjacent rotary kilns are connected by a spiral feeder.

[0005] By adopting the above technical solution, when treating waste activated carbon, the waste activated carbon is fed from the waste activated carbon feeding system into the frontmost rotary kiln for incineration. After the first stage of incineration is completed, the waste activated carbon that has completed the first stage of incineration is fed into the next stage of rotary kiln for incineration through the bolt feeder. Similarly, when the waste activated carbon is completely incinerated in the last stage of rotary kiln, it is fed into the spiral slag discharger from the rear end of the rotary kiln and finally discharged out of the incinerator through the bolt slag discharger.

[0006] This setting method uses a multi-stage rotary kiln to achieve a relay incineration method for the waste activated carbon, which increases the total residence time of the waste activated carbon in the incinerator from the conventional two hours to about six hours, thereby effectively ensuring that the waste activated carbon can be fully burned in the incinerator. Effectively ensuring that the waste activated carbon is fully burned in the incinerator, which is conducive to ensuring that the thermal reduction rate of the waste activated carbon stably meets the standard, and achieving environmental protection and energy saving in the incineration of waste activated carbon.

[0007] Preferably, a material raising plate is provided in the rotary kiln.

[0008] By adopting the above technical solution, the waste activated carbon sinks to the bottom of the rotary kiln after entering the rotary kiln. The lifting plate allows the waste activated carbon sinking to be fully lifted up in the rotary kiln and fully contacted with the air in the rotary kiln, thereby promoting the subsequent full incineration of the waste activated carbon material.

[0009] Preferably, a temperature-raising burner is provided at the tail of the rotary kiln.

[0010] By adopting the above technical solution, temperature control is crucial during the incineration process of waste activated carbon. A heating burner is added to the tail of the rotary kiln. The temperature at the tail of the rotary kiln can be raised to 1200°C through the heating burner. The addition of the heating burner at the tail of the rotary kiln further allows the previously unburned waste activated carbon to be further incinerated, thereby effectively ensuring that the waste activated carbon is fully burned.

[0011] Preferably, a waste liquid spray gun is further provided at the tail of the rotary kiln.

[0012] By adopting the above technical solution, the waste liquid spray gun can fully oxidize the waste liquid generated by the incineration of the waste activated carbon during the incineration process, so that it can fully contact with the air in the secondary rotary kiln, thereby increasing the contact area between it and other reactants in the secondary rotary kiln, so that it can be fully burned.

[0013] Preferably, an ascending flue is provided between the tail of the rotary kiln at the very end and the spiral slag discharger.

[0014] By adopting the above technical solution, after the waste activated carbon is incinerated in a rotary kiln, a large amount of flue gas is generated at the rear of the rotary kiln. This flue gas contains a large amount of dust particles. When discharged to the outside, these dust particles pollute the outside air, which is not in line with the concept of environmental protection and energy conservation. By using an ascending flue to collect the flue gas in the rotary kiln and further incinerate the dust particles in the flue gas in the ascending flue, the flue gas generated during the incineration of the waste activated carbon is effectively prevented from being discharged outside the rotary kiln, thereby achieving environmental protection and energy conservation during the incineration of the waste activated carbon.

[0015] Preferably, a double flap valve is installed at the tail of the spiral slag discharger.

[0016] By adopting the above technical solution, the double flap valve is divided into two layers, each layer is equipped with a corresponding valve plate. During the incineration of waste activated carbon in the rotary kiln, both valve plates are in a closed state. The two valve plates control the opening and closing of the rear end of the spiral slag discharger, effectively preventing the waste activated carbon from leaking from the rear end of the spiral slag discharger before it is fully burned.

[0017] Preferably, the valve plate of the double flap valve is made of stainless steel.

[0018] By adopting the above technical solution, the valve plate is not easy to rust after long-term use and has a long service life.

[0019] Preferably, the screw feeder is equipped with a crushing mechanism for crushing the waste activated carbon.

[0020] By adopting the above technical solution, after the waste activated carbon is incinerated in the rotary kiln, it is transferred to the adjacent rotary kiln via the screw feeder. The waste activated carbon is further crushed and stirred by the crushing mechanism in the screw feeder. This allows the waste activated carbon to fully contact the combustion-supporting air in the rotary kiln after entering the next-level rotary kiln. By adding the crushing mechanism in the screw feeder, the contact between the waste activated carbon and the materials in the rotary kiln and the combustion-supporting air can be effectively enhanced, which is conducive to significantly improving the combustion rate of the waste activated carbon.

[0021] In summary, the present application includes at least one of the following beneficial technical effects: 1. When specifically treating waste activated carbon, the waste activated carbon is fed from the waste activated carbon feeding system into the frontmost rotary kiln for incineration. After the first stage of incineration is completed, the waste activated carbon that has completed the first stage of incineration is continuously fed into the next stage of rotary kiln for incineration through the bolt feeder. Similarly, when the waste activated carbon is completely incinerated in the last rotary kiln, it is fed into the spiral slag discharger from the tail of the last rotary kiln and finally discharged out of the incinerator through the bolt slag discharger.

[0022] This configuration utilizes a multi-stage rotary kiln to achieve a relay-type incineration of the spent activated carbon. This increases the total residence time of the spent activated carbon in the incinerator from the conventional two hours to approximately six hours. This effectively ensures that the spent activated carbon is fully burned in the incinerator, effectively ensuring that the spent activated carbon is fully burned in the incinerator. This helps ensure that the thermal loss rate of the spent activated carbon consistently meets the standard, achieving environmental and energy-saving benefits from the incineration of spent activated carbon.

[0023] 2. After entering the rotary kiln, the waste activated carbon sinks to the bottom of the rotary kiln. The lifting plate allows the waste activated carbon at the bottom of the rotary kiln to be fully lifted up inside the rotary kiln and fully contact with the air in the rotary kiln, which is conducive to promoting the subsequent full incineration of the waste activated carbon material;

[0024] 3. After the spent activated carbon is incinerated in a rotary kiln, a large amount of flue gas is generated at the rear of the kiln. This flue gas contains a large amount of dust particles. When discharged to the outside, these dust particles pollute the outside air and are not in line with the concept of environmental protection and energy conservation. By using an ascending flue to collect the flue gas in the rotary kiln and further incinerate the dust particles in the flue gas, the flue gas generated during the incineration of the spent activated carbon is effectively prevented from being discharged outside the rotary kiln, thereby achieving environmental protection and energy conservation during the incineration of the spent activated carbon. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] FIG1 is a schematic diagram of the overall structure of an embodiment of the present application;

[0026] FIG2 is an enlarged schematic diagram of point A in FIG1 .

[0027] Reference numerals: In the figure, 1, rotary kiln; 11, first-stage rotary kiln; 12, second-stage rotary kiln; 2, spiral slag discharger; 3, spiral feeder; 4, ascending flue; 5, double flap valve. DETAILED DESCRIPTION

[0028] The present application will be further described in detail below with reference to Figures 1 and 2. Example

[0029] The present embodiment discloses a novel waste activated carbon incinerator. Referring to Figures 1 and 2 , the incinerator comprises multiple stages of rotary kilns 1 connected in series. The frontmost rotary kiln 1 is connected to a waste activated carbon feeding system, while the rear end of the rearmost rotary kiln 1 is connected to a spiral slag discharger 2. Adjacent rotary kilns 1 are connected via a spiral feeder 3. Specifically, when treating the waste activated carbon, the waste activated carbon is fed from the waste activated carbon feeding system into the frontmost rotary kiln 1 for incineration. After the first stage of incineration is completed, the waste activated carbon is fed via a bolt feeder into the next stage of rotary kiln 1 for incineration. This process continues until the waste activated carbon is completely incinerated in the rearmost rotary kiln 1. The waste activated carbon is then fed from the rear end of the rearmost rotary kiln 1 into a spiral slag discharger 2 and ultimately discharged out of the incinerator via the bolt slag discharger.

[0030] This arrangement utilizes a multi-stage rotary kiln 1 to implement a relay-type incineration method for the waste activated carbon, thereby increasing the total residence time of the waste activated carbon in the incinerator from the conventional two hours to about six hours, thereby effectively ensuring that the waste activated carbon can be fully burned in the incinerator and effectively ensuring that the waste activated carbon is fully burned in the incinerator, thereby facilitating the stable compliance of the thermal loss on ignition rate of the waste activated carbon and achieving environmental protection and energy saving in the incineration of the waste activated carbon.

[0031] 1 and 2 , in this embodiment, the number of rotary kilns 1 is set to two, namely a primary rotary kiln 11 and a secondary rotary kiln 12. The primary rotary kiln 11 is located at the front end and is connected to the waste activated carbon feeding system. The screw feeder 3 is installed between the primary rotary kiln 11 and the secondary rotary kiln 12. The rear end of the secondary rotary kiln 12 is connected to the spiral slag discharger 2.

[0032] Specifically, the primary rotary kiln 11 primarily dries and gasifies the waste activated carbon, supplemented by controlled oxygen combustion to provide the required temperature for drying and gasification. The secondary rotary kiln 12 is filled with sufficient oxygen to combust the waste activated carbon, and high-temperature melting is employed in the middle and rear sections of the secondary rotary kiln 12 to effectively ensure the combustion efficiency of the waste activated carbon.

[0033] 1 and 2 , a crushing mechanism is installed in the screw feeder 3. After the waste activated carbon is incinerated in the primary rotary kiln 11, it is transferred to the secondary rotary kiln 12 via the screw feeder 3. During this process, the waste activated carbon is crushed and stirred again by the crushing mechanism in the screw feeder 3. This allows the waste activated carbon to fully contact the combustion-supporting air in the secondary rotary kiln 12 after entering the secondary rotary kiln 12. By adding the crushing mechanism in the screw feeder 3, the contact between the waste activated carbon and the materials and the combustion-supporting air in the secondary rotary kiln 12 can be effectively enhanced, thereby significantly improving the combustion rate of the waste activated carbon.

[0034] 1 and 2 , a lifting plate is provided in the primary rotary kiln 11. After the waste activated carbon enters the primary rotary kiln 11, it sinks to the bottom of the primary rotary kiln 11. The lifting plate allows the waste activated carbon that has sunk to the bottom of the primary rotary kiln 11 to be fully lifted up in the primary rotary kiln 11 and fully contact the air in the primary rotary kiln 11, thereby facilitating the subsequent full incineration of the waste activated carbon material.

[0035] At the same time, a temperature-raising burner and a waste liquid spray gun are added to the tail of the secondary rotary kiln 12. Temperature control is crucial during the incineration process of waste activated carbon. The temperature-raising burner is added to the tail of the secondary rotary kiln 12. The temperature at the tail of the secondary rotary kiln 12 can be raised to 1200°C by the temperature-raising burner. The temperature-raising burner is added to the tail of the secondary rotary kiln 12 to further incinerate the waste activated carbon that has not been completely burned, thereby effectively ensuring that the waste activated carbon is fully burned.

[0036] During the incineration process of the waste activated carbon, the waste liquid spray gun can fully oxidize the waste liquid generated by the incineration of the waste activated carbon, so that it can fully contact with the air in the secondary rotary kiln 12, thereby increasing the contact area between the waste liquid and other reactants in the secondary rotary kiln 12, so that the waste liquid can be fully burned.

[0037] Furthermore, referring to Figures 1 and 2, an ascending flue 4 is installed vertically between the rear end of the secondary rotary kiln 12 and the spiral slag discharger 2. After the waste activated carbon is incinerated in the primary and secondary rotary kilns 11 and 12, a large amount of flue gas is generated at the rear end of the secondary rotary kiln 12. This flue gas contains a large amount of dust particles, which, when discharged to the outside, pollute the outside air and are not in line with environmental protection and energy conservation. The ascending flue 4 collects the flue gas within the secondary rotary kiln 12 and further incinerates the dust particles in the flue gas therein. This effectively prevents the flue gas generated during the incineration of the waste activated carbon from being discharged outside the rotary kiln, thereby achieving environmental protection and energy conservation during the incineration of the waste activated carbon.

[0038] Specifically, referring to Figures 1 and 2, a double flap valve 5 is installed at the tail end of the spiral slag discharger 2. The double flap valve 5 is divided into two layers, each layer is equipped with a corresponding valve plate. During the incineration of the waste activated carbon in the rotary kiln 1, both valve plates are in a closed state. The opening and closing of the tail end of the spiral slag discharger 2 are controlled by the two valve plates, effectively preventing the waste activated carbon from leaking from the tail end of the spiral slag discharger 2 before being fully burned.

[0039] Furthermore, both valve plates on the double flap valve 5 are made of stainless steel, which makes the valve plates less likely to rust after long-term use and has a long service life.

[0040] The implementation principle of a new type of waste activated carbon incinerator in the embodiment of the present application is: using a multi-stage rotary kiln 1 to realize a relay incineration method for the waste activated carbon, so that the total residence time of the waste activated carbon in the incinerator is increased from the conventional two hours to about six hours, thereby effectively ensuring that the waste activated carbon can be fully burned in the incinerator, effectively ensuring that the waste activated carbon is fully burned in the incinerator, and thus helping to ensure that the thermal reduction rate of the waste activated carbon is stable and meets the standard, thereby achieving environmental protection and energy saving in the incineration of waste activated carbon.

[0041] The above are all preferred embodiments of the present application and are not intended to limit the scope of protection of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the scope of protection of the present application.

Claims

1. A novel waste activated carbon incinerator, characterized in that: It is composed of a series of multi-stage rotary kilns (1). The rotary kiln (1) at the front end is connected to the waste activated carbon feeding system. A screw slag discharger (2) is connected to the tail of the rotary kiln (1) at the end. Adjacent rotary kilns (1) are connected by a screw feeder (3).

2. The novel waste activated carbon incinerator according to claim 1, characterized in that: The rotary kiln (1) is internally provided with lifting plates.

3. A novel waste activated carbon incinerator according to claim 1, characterized in that: A heating burner is provided at the tail of the rotary kiln (1).

4. A novel waste activated carbon incinerator according to claim 3, characterized in that: A waste liquid spray gun is also provided at the tail of the rotary kiln (1).

5. A novel waste activated carbon incinerator according to claim 1, characterized in that: An upcomer (4) is provided between the tail of the rotary kiln (1) at the end and the screw slag discharger (2).

6. A novel waste activated carbon incinerator according to claim 1, characterized in that: A double flap valve (5) is installed at the tail of the screw slag discharger (2).

7. A novel waste activated carbon incinerator according to claim 6, characterized in that: The valve plate of the double flap valve (5) is made of stainless steel.

8. A novel waste activated carbon incinerator according to claim 1, characterized in that: A crushing mechanism for crushing waste activated carbon is installed in the screw feeder (3).

Images