An activated carbon treatment system and method based on a coal-fired power plant sludge co-combustion system

Abstract

The application discloses a kind of activated carbon treatment system and method based on coal-fired power plant sludge blending combustion system, including activated carbon storage, rotary drying furnace, wet sludge bin, burner, pulverized coal boiler, environmental protection device and chimney;The outlet of activated carbon storage is connected with rotary drying furnace, and the outlet of wet sludge bin is connected with rotary drying furnace;The outlet of rotary drying furnace is connected with burner, and the burner is arranged on the hearth of pulverized coal boiler, the high-temperature flue gas interface on the tail flue of pulverized coal boiler is communicated with the inlet of rotary drying furnace, and the tail flue outlet of pulverized coal boiler is communicated with chimney through environmental protection device, and the system and method can solve the problem of waste activated carbon treatment, realize the energy saving, environmental protection and harmless disposal of waste activated carbon.

Description

TECHNICAL FIELD

[0001] The application belongs to the field of activated carbon recycling and blending combustion treatment, and relates to an activated carbon treatment system and method based on a sludge blending combustion system of a coal-fired power plant. BACKGROUND

[0002] Activated carbon has been widely used in various industries, such as food, medicine decolorization, odor removal, production of gas masks, treatment of synthetic industrial water, and industrial organic waste treatment. The recycling and treatment of activated carbon have also been increasingly valued. As a new approach, solid waste incineration disposal has attracted attention from the state and the industry. At present, waste activated carbon is treated by recycling and reuse. However, the recycling and treatment of some activated carbon is costly, and therefore, the activated carbon that cannot be recycled and reused is landfilled or incinerated. SUMMARY

[0003] The application aims to overcome the shortcomings of the prior art and provide an activated carbon treatment system and method based on a sludge blending combustion system of a coal-fired power plant, which can solve the problem of waste activated carbon treatment and realize energy saving, environmental protection, and harmless disposal of waste activated carbon.

[0004] To achieve the above-mentioned purpose, the activated carbon treatment system based on the sludge blending combustion system of the coal-fired power plant comprises an activated carbon storage bin, a rotary drying furnace, a wet sludge bin, a burner, a pulverized coal boiler, an environmental protection device, and a chimney.

[0005] The outlet of the activated carbon storage bin is connected with the rotary drying furnace, and the outlet of the wet sludge bin is connected with the rotary drying furnace. The outlet of the rotary drying furnace is connected with the burner, which is arranged on the hearth of the pulverized coal boiler. The high-temperature flue gas interface on the tail flue of the pulverized coal boiler is connected with the inlet of the rotary drying furnace in communication, and the outlet of the tail flue of the pulverized coal boiler is connected with the chimney in communication through the environmental protection device.

[0006] The system further comprises an activated carbon receiving device, an activated carbon conveying equipment, an activated carbon crushing equipment, an activated carbon feeding device, and an activated carbon conveying fan.

[0007] The outlet of the activated carbon receiving device is connected with the inlet of the activated carbon conveying equipment. The outlet of the activated carbon conveying equipment is connected with the inlet of the activated carbon crushing equipment in communication. The outlet of the activated carbon crushing equipment is connected with the inlet of the activated carbon feeding device. The activated carbon conveying fan is connected with the inlet of the activated carbon feeding device. The outlet of the activated carbon feeding device is connected with the inlet of the activated carbon storage bin.

[0008] The outlet of the activated carbon storage bin is connected with the rotary drying furnace through a first material conveying equipment and a first screw feeding equipment.

[0009] The outlet of the wet sludge bin is connected with the rotary drying furnace through a second material conveying equipment and a second screw feeding equipment.

[0010] Two activated carbon feeding devices are provided with frequency conversion controllers.

[0011] The outlet of the rotary drying furnace is connected with the pulverizing conveying section and the booster fan and the burner.

[0012] The pipeline between the activated carbon conveying fan and the activated carbon feeding device, the pipeline between the wet sludge bin and the second material conveying equipment, the pipeline between the second screw feeding equipment and the rotary drying furnace and the pipeline between the pulverizing conveying section and the booster fan are all communicated with the negative pressure system pipeline.

[0013] The high-temperature flue gas interface is arranged on the flue between the furnace outlet of the pulverized coal boiler and the air preheater.

[0014] The activated carbon bypass pipeline is further included, one end of the activated carbon bypass pipeline is communicated with the outlet of the activated carbon feeding device, and the other end of the activated carbon bypass pipeline is communicated with the burner.

[0015] The activated carbon treatment method based on the sludge blending combustion system of the coal-fired power plant provided by the application comprises the following steps:

[0016] The activated carbon output from the activated carbon storage bin and the wet sludge output from the wet sludge bin enter the rotary drying furnace, are dried by the high-temperature flue gas in the rotary drying furnace, then enter the burner, and are sent into the furnace by the burner for combustion, part of the high-temperature flue gas in the tail flue of the pulverized coal boiler enters the rotary drying furnace through the high-temperature flue gas interface, and the remaining flue gas enters the chimney after being treated by the environmental protection device.

[0017] The application has the following beneficial effects:

[0018] The activated carbon treatment system and method based on the sludge blending combustion system of the coal-fired power plant provided by the application add a small amount of equipment to the existing sludge blending combustion system to achieve the purpose of treating waste activated carbon, specifically, the activated carbon is mixed and dried with the wet sludge, and then is sent into the furnace for combustion, wherein the heat source generated in the drying process comes from the high-temperature flue gas in the tail flue, the flue gas output from the tail flue is treated by the environmental protection device, and then is discharged through the chimney, so that the harmless disposal of the activated carbon is realized, the process is simple and occupies small area, the existing sludge blending combustion system is greatly utilized, the technology is mature, and the purpose of energy saving and emission reduction is achieved. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 It is a structural schematic diagram of the application.

[0020] Wherein, 1 is activated carbon receiving device, 2 is activated carbon conveying equipment, 3 is activated carbon crushing equipment, 4 is activated carbon feeding device, 5 is activated carbon conveying fan, 6 is activated carbon storage, 7 is wet sludge bin, 8 is material conveying equipment, 9 is spiral feeding equipment, 10 is rotary drying furnace, 11 is crushing conveying section, 12 is booster fan, 13 is burner, 14 is pulverized coal boiler, 15 is high-temperature flue gas interface, 16 is environmental protection device, 17 is negative pressure system pipeline, 18 is activated carbon bypass pipeline. DETAILED DESCRIPTION

[0021] In order to make the personnel in the technical field better understand the present application, the technical solutions in the embodiments of the present application will be described clearly and completely below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, not all the embodiments, and are not intended to limit the scope of the present application. In addition, in the following description, the description of the known structures and technologies is omitted to avoid unnecessary confusion of the concepts disclosed in the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without making creative efforts should belong to the scope of protection of the present application.

[0022] The structural schematic diagram according to the disclosed embodiments of the present application is shown in the drawings. These drawings are not drawn to scale, in which some details are enlarged for the purpose of clear expression, and some details can be omitted. The shapes of various regions, layers and their relative size and positional relationship shown in the drawings are only exemplary, and in actuality, there can be deviations due to manufacturing tolerances or technical limitations, and the regions / layers with different shapes, sizes and relative positions can be additionally designed by those skilled in the art according to actual needs.

[0023] Reference Figure 1 The activated carbon treatment system based on the sludge blending combustion system of the coal-fired power plant according to the present application comprises an activated carbon receiving device 1, an activated carbon conveying equipment 2, an activated carbon crushing equipment 3, an activated carbon feeding device 4, an activated carbon conveying fan 5, an activated carbon storage 6, a wet sludge bin 7, a material conveying equipment 8, a spiral feeding equipment 9, a rotary drying furnace 10, a crushing conveying section 11, a booster fan 12, a burner 13, a pulverized coal boiler 14, a high-temperature flue gas interface 15, an environmental protection device 16, a negative pressure system pipeline 17 and an activated carbon bypass pipeline 18.

[0024] The outlet of the activated carbon receiving device 1 is connected with the inlet of the activated carbon conveying device 2, the outlet of the activated carbon conveying device 2 is communicated with the inlet of the activated carbon crushing device 3, the outlet of the activated carbon crushing device 3 is connected with the inlet of the activated carbon feeding device 4, the activated carbon conveying fan 5 is connected with the inlet of the activated carbon feeding device 4, the outlet of the activated carbon feeding device 4 is connected with the inlet of the activated carbon storage bin 6, the outlet of the activated carbon storage bin 6 is connected with the rotary drying furnace 10 through the first material conveying device 8 and the first screw feeding device 9, the outlet of the wet sludge bin 7 is connected with the rotary drying furnace 10 through the second material conveying device 8 and the second screw feeding device 9, the outlet of the rotary drying furnace 10 is communicated with the inlet of the crushing conveying section 11, the outlet of the crushing conveying section 11 is connected with the combustor 13 through the booster fan 12, the combustor 13 is arranged on the hearth of the pulverized coal boiler 14, the high-temperature flue gas interface 15 on the tail flue of the pulverized coal boiler 14 is communicated with the inlet of the rotary drying furnace 10, and the tail flue outlet of the pulverized coal boiler 14 is communicated with the chimney through the environmental protection device 16.

[0025] It should be noted that the activated carbon receiving device 1, the activated carbon conveying device 2 and the activated carbon storage bin 6 form an activated carbon treatment and storage device, and the high-temperature flue gas interface 15 is arranged on the flue between the hearth outlet of the pulverized coal boiler 14 and the air preheater.

[0026] The pipeline between the activated carbon conveying fan 5 and the activated carbon feeding device 4, the pipeline between the wet sludge bin 7 and the second material conveying device 8, the pipeline between the second screw feeding device 9 and the rotary drying furnace 10 and the pipeline between the crushing conveying section 11 and the booster fan 12 are all communicated with the negative pressure system pipeline 17.

[0027] One end of the activated carbon bypass pipeline 18 is communicated with the outlet of the activated carbon feeding device 4, and the other end of the activated carbon bypass pipeline 18 is communicated with the combustor 13.

[0028] The activated carbon treatment method based on the sludge blending combustion system of the coal-fired power plant provided by the application comprises the following steps:

[0029] The activated carbon output by the activated carbon receiving device 1 is conveyed through the activated carbon conveying device 2 and crushed through the activated carbon crushing device 3, and then is sent into the activated carbon storage bin 6 through the activated carbon feeding device 4, the activated carbon output by the activated carbon storage bin 6 and the wet sludge output by the wet sludge bin 7 enter the rotary drying furnace 10 through the material conveying device 8 and the screw feeding device 9, are dried by high-temperature flue gas in the rotary drying furnace 10, then enter the combustor 13 through the crushing conveying section 11 and the booster fan 12, are sprayed into the hearth of the pulverized coal boiler 14 through the combustor 13, are combusted in the hearth of the pulverized coal boiler 14, part of the high-temperature flue gas in the tail flue of the pulverized coal boiler 14 enters the rotary drying furnace 10 through the high-temperature flue gas interface 15, and the remaining flue gas enters the chimney after being treated by the environmental protection device 16.

[0030] In addition, when the sludge blending system is shut down for maintenance, the activated carbon blending treatment is realized through the activated carbon feeding device 4, the activated carbon conveying fan 5 and the activated carbon bypass pipeline 18.

[0031] The activated carbon feeding device 4 is provided with a frequency conversion controller. According to the combustion condition of the pulverized coal boiler 14, the treatment condition of the environmental protection device 16 and the pollution monitoring condition, the blending ratio of the activated carbon is adjusted by controlling the material conveying equipment 8 and the screw feeding equipment 9. The waste gas, virus and heavy metal can be treated in the high temperature environment of the pulverized coal boiler 14 by blending the sludge and the activated carbon according to a certain ratio. The environmental protection device 16 after the pulverized coal boiler 14 can effectively remove the pollutants generated in the blending process. In addition, in the actual operation, whether the pretreatment device needs to be increased to remove the impurities affecting the pollution emission standard can be determined according to the quality of the waste activated carbon.

[0032] Finally, it should be noted that: the above examples are used to illustrate the technical solutions of the present application, but not to limit it. Although the present application has been described in detail with reference to the above examples, those skilled in the art should understand that the specific embodiments of the present application can be modified or replaced by the same, without departing from the spirit and scope of the present application. Any modification or equivalent replacement without departing from the spirit and scope of the present application should be covered in the protection scope of the claims of the present application.

Claims

1. A system for activated carbon treatment based on a sludge blending system of a coal-fired power plant, characterized by, The active carbon storage bin (6), the rotary drying furnace (10), the wet sludge bin (7), the burner (13), the coal powder boiler (14), the environmental protection device (16) and the chimney are connected in series. The outlet of the active carbon storage bin (6) is connected with the rotary drying furnace (10), and the outlet of the wet sludge bin (7) is connected with the rotary drying furnace (10); the outlet of the rotary drying furnace (10) is connected with the burner (13), the burner (13) is arranged on the hearth of the coal powder boiler (14), the high-temperature flue gas interface (15) on the tail flue of the coal powder boiler (14) is connected with the inlet of the rotary drying furnace (10), and the outlet of the tail flue of the coal powder boiler (14) is connected with the chimney through the environmental protection device (16).

2. The activated carbon treatment system based on the coal-fired power plant sludge blending combustion system according to claim 1, characterized in that, The active carbon receiving device (1), the active carbon conveying equipment (2), the active carbon crushing equipment (3), the active carbon feeding device (4) and the active carbon conveying fan (5) are further included. The outlet of the active carbon receiving device (1) is connected with the inlet of the active carbon conveying equipment (2), the outlet of the active carbon conveying equipment (2) is connected with the inlet of the active carbon crushing equipment (3), the outlet of the active carbon crushing equipment (3) is connected with the inlet of the active carbon feeding device (4), the active carbon conveying fan (5) is connected with the inlet of the active carbon feeding device (4), and the outlet of the active carbon feeding device (4) is connected with the inlet of the active carbon storage bin (6).

3. The activated carbon treatment system based on the coal-fired power plant sludge blending combustion system according to claim 1, characterized in that, The outlet of the active carbon storage bin (6) is connected with the rotary drying furnace (10) through the first material conveying equipment (8) and the first screw feeding equipment (9).

4. The activated carbon treatment system based on the coal-fired power plant sludge blending combustion system according to claim 3, characterized in that, The outlet of the wet sludge bin (7) is connected with the rotary drying furnace (10) through the second material conveying equipment (8) and the second screw feeding equipment (9).

5. The activated carbon treatment system based on the coal-fired power plant sludge blending combustion system according to claim 4, characterized in that, The active carbon feeding device (4) is provided with a frequency converter.

6. The activated carbon treatment system based on the coal-fired power plant sludge blending combustion system according to claim 4, characterized in that, The outlet of the rotary drying furnace (10) is connected with the burner (13) through the crushing conveying section (11) and the booster fan (12).

7. The activated carbon treatment system based on a coal-fired power plant sludge co-combustion system according to claim 6, characterized in that, The negative pressure system pipeline (17) is connected with the pipeline between the active carbon conveying fan (5) and the active carbon feeding device (4), the pipeline between the wet sludge bin (7) and the second material conveying equipment (8), the pipeline between the second screw feeding equipment (9) and the rotary drying furnace (10) and the pipeline between the crushing conveying section (11) and the booster fan (12).

8. The activated carbon treatment system based on a coal-fired power plant sludge co-combustion system according to claim 1, characterized by, The high-temperature flue gas interface (15) is arranged on the flue between the hearth outlet of the coal powder boiler (14) and the air preheater.

9. The activated carbon treatment system based on a coal-fired power plant sludge co-combustion system according to claim 1, characterized by, The active carbon bypass pipeline (18) is further included, one end of the active carbon bypass pipeline (18) is connected with the outlet of the active carbon feeding device (4), and the other end of the active carbon bypass pipeline (18) is connected with the burner (13).

10. A method for activated carbon treatment based on a sludge blending system of a coal-fired power plant, characterized by, The method comprises the following steps: The activated carbon output from the activated carbon storage bin (6) and the wet sludge output from the wet sludge storage bin (7) enter the rotary drying furnace (10), are dried by high-temperature flue gas in the rotary drying furnace (10), then enter the burner (13), and are sent into the furnace of the pulverized coal boiler (14) by the burner (13) to be burned. Part of the high-temperature flue gas in the tail flue of the pulverized coal boiler (14) enters the rotary drying furnace (10) through the high-temperature flue gas interface (15), and the remaining flue gas enters the chimney after being treated by the environmental protection device (16).

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