A powdered activated carbon incineration feeding device

Abstract

The present invention relates to a powdered activated carbon incineration feeding device, including a combustion tube, a primary air inlet, a secondary air inlet and an electronic igniter; one end of the combustion tube is an activated carbon inlet, and the other end is a flamethrower. The primary air inlet, the electronic igniter and the secondary air inlet are all arranged on the combustion tube, the primary air inlet is connected to the primary air inlet pipe, the secondary air inlet is connected to the secondary air inlet pipe, and an injection pipe is arranged between each secondary air inlet pipe and the combustion tube near the flamethrower, and the angle between the axial center line of the connection between the injection pipe and the combustion tube and the axial center line of the combustion tube is an acute angle. This technical solution utilizes direct injection combustion technology, which avoids uneven feeding, low incineration removal rate and the occurrence of deflagration caused by traditional feeding methods, greatly improves the disposal efficiency and safety of waste activated carbon, and guides a new direction for activated carbon incineration.

Description

Technical Field

[0001] The invention belongs to the technical field of hazardous waste disposal, and in particular relates to a powdered activated carbon incineration feeding device. Background Art

[0002] Activated carbon is a kind of specially treated carbon made from organic materials (fruit shells, coal, wood, etc.). Because of its large specific surface area and developed microporous structure, it can effectively adsorb pollutants and is widely used in the field of environmental protection, mainly involving the treatment of wastewater and waste gas. How to properly handle and dispose of activated carbon that has reached saturation has brought certain challenges to environmental governance in related fields. At present, the most common methods are landfill and incineration. The landfill method cannot achieve the final disposal of activated carbon, and it occupies a large area and wastes land resources; the incineration method can achieve the reduction and harmless disposal of activated carbon and has become the mainstream of the current disposal of activated carbon. However, since powdered activated carbon generally has a relatively high calorific value, and after entering the furnace, it will suddenly be exposed to high temperature and will produce deflagration. The negative pressure in the furnace will also bring the powdered activated carbon to the back end of the kiln, and it cannot be completely burned, resulting in low efficiency of activated carbon incineration and safety accidents. Summary of the invention

[0003] The purpose of the present invention is to provide a powdered activated carbon incineration feeding device to solve the problems of deflagration and low incineration rate in traditional incineration processes.

[0004] To achieve the above objectives, this application is implemented through the following technical solutions:

[0005] A powdered activated carbon incineration feeding device, a combustion tube, a primary air inlet, a secondary air inlet and an electronic igniter;

[0006] One end of the combustion tube is an activated carbon inlet, and the other end is a flame outlet. The primary air inlet is arranged on the combustion tube near the activated carbon inlet, and the primary air inlet pipe is connected to the primary air inlet.

[0007] A plurality of secondary air inlets are arranged in the middle of the combustion tube, and each secondary air inlet is connected to a secondary air inlet pipe;

[0008] The electronic igniter is arranged on the combustion tube between the primary air inlet and the secondary air inlet;

[0009] An air injection pipe is arranged between each secondary air inlet pipe and the combustion pipe near the flame emitting port, and the angle between the axial center line of the connection between the air injection pipe and the combustion pipe and the axial center line of the combustion pipe is an acute angle.

[0010] Furthermore, the activated carbon inlet is connected to the waste activated carbon supply device.

[0011] Furthermore, the primary air inlet pipe and the secondary air inlet pipe are both connected to the air supply device, and the flow rate entering the combustion tube through the primary air inlet pipe is smaller than the flow rate entering the combustion tube through the secondary air inlet pipe.

[0012] Furthermore, the primary air inlet is located in the low-temperature section of the combustion tube, and low-nitrogen combustion is ensured by a small flow rate and a low excess air coefficient. The secondary air inlet is located in the high-temperature section of the combustion tube, and the temperature is reduced by a large flow rate and a high excess air coefficient, thereby ensuring low-nitrogen combustion.

[0013] Furthermore, the flame vent is a conical port, the material of the flame vent is Hastelloy, and the flame vent is connected to the incinerator.

[0014] Furthermore, it also includes fire-spraying bricks, and the powdered activated carbon incineration feeding device is arranged in the fire-spraying bricks.

[0015] Furthermore, the electronic igniter is an automatic pulse electronic igniter.

[0016] The beneficial effects of the present invention are:

[0017] This technical solution utilizes direct injection combustion technology to avoid uneven feeding, low incineration removal rate and explosion caused by traditional feeding methods, greatly improving the disposal efficiency and safety of waste activated carbon, and providing a new direction for activated carbon incineration.

[0018] This technical solution ensures that the system is always in low-nitrogen combustion through a two-stage wind-protected method, reduces NOx emissions, and ensures that the system operates stably and meets standards. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a forward schematic diagram of the powdered activated carbon incineration feeding device of the present invention.

[0020] Figure 2 It is a side schematic diagram of the powdered activated carbon incineration feeding device of the present invention.

[0021] Figure 3 It is a top view schematic diagram of the powdered activated carbon incineration feeding device of the present invention.

[0022] Description of Reference Numerals

[0023] 1—combustion tube, 2—activated carbon inlet, 3—primary air inlet, 4—secondary air inlet, 5—secondary air inlet pipe, 6—electronic igniter, 7—injection tube, 8—fire-spraying brick, 9—fire-spraying port. DETAILED DESCRIPTION

[0024] The technical solution of the present application is described in detail below in conjunction with the accompanying drawings. The following embodiments are merely exemplary and can only be used to explain and illustrate the technical solution of the present invention, but cannot be construed as limiting the technical solution of the present invention.

[0025] like Figures 1 to 3 As shown, the present application provides a powdered activated carbon incineration feeding device, including a combustion tube 1. The combustion tube of the present application is in the shape of a long tube with a constant inner diameter. In other embodiments of the present application, the inner diameters of the combustion tubes may not be equal. One end of the combustion tube is an activated carbon inlet 2, and the other end is a flame nozzle 9. The activated carbon inlet is a waste activated carbon feeding port, which is connected to the feeding device of the waste activated carbon. The flame nozzle is a conical structure, and the material is Hastelloy, which has high temperature resistance and wear resistance. The flame nozzle is connected to the incinerator.

[0026] The primary air inlet 3 is arranged on the combustion tube near the activated carbon inlet, and the primary air inlet pipe is respectively connected to the primary air inlet and the air supply device (not shown in the figure). A plurality of secondary air inlets 4 are arranged in the middle of the combustion tube. This application takes four secondary air inlets as an example for explanation. The four secondary air inlets are arranged at equal intervals on the combustion tube, and each secondary air inlet is connected to a secondary air inlet pipe 5, and the secondary air inlet pipe is connected to the air supply device.

[0027] In the technical solution of the present application, the air flow rate entering the combustion tube through the primary air inlet pipe is less than the air flow rate entering the combustion tube through the secondary air inlet pipe. The primary air inlet is located in the low-temperature section of the combustion tube, and low-nitrogen combustion is ensured by a small flow rate and a low excess air coefficient. The secondary air inlet is located in the high-temperature section of the combustion tube, and the temperature is reduced by a large flow rate and a high excess air coefficient, thereby ensuring low-nitrogen combustion. This technical solution achieves circumferential wind absorption by arranging four secondary air inlets in the circumference of the combustion tube, thereby ensuring that the activated carbon is fully burned and incinerated.

[0028] The electronic igniter 6 of the present application is an automatic pulse electronic igniter, which provides an initial ignition point to the activated carbon by generating a high-voltage ignition package.

[0029] An injection pipe 7 is provided between each secondary air inlet pipe 5 and the combustion pipe near the flame outlet. The angle between the axial center line of the connection between the injection pipe and the combustion pipe and the axial center line of the combustion pipe is an acute angle. In the present application, the angle is less than 60 degrees. The compressed air enters the vicinity of the flame outlet of the combustion pipe through the secondary air inlet pipe and the injection pipe. Because of the acute angle between the injection pipe and the combustion pipe, it is convenient for the compressed air to carry the burning activated carbon into the incinerator, thereby ensuring the safety of incineration.

[0030] The above-mentioned powdered activated carbon incineration feeding device is arranged in the fire-spraying brick 8, and the fire-spraying brick is the mounting support point of the powdered activated carbon incineration feeding device. The spraying device of the present application adopts a split type, which can realize online clearing and disassembly.

[0031] The above is only an embodiment of the present application and does not constitute any form of limitation to the present application. Although the present application is disclosed as above with a preferred embodiment, it is not intended to limit the present application. Any technician familiar with the profession, without departing from the scope of the technical solution of the present application, using the technical content disclosed above to make slight changes or modifications are equivalent to equivalent implementation cases and fall within the scope of the technical solution.

Claims

1. A powdered activated carbon incineration feeding device, characterized in that: It includes a combustion tube, a primary air inlet, a secondary air inlet and an electronic igniter; One end of the combustion tube is an activated carbon inlet, and the other end is a flame outlet. The primary air inlet is arranged on the combustion tube near the activated carbon inlet, and the primary air inlet pipe is connected to the primary air inlet. A plurality of secondary air inlets are arranged in the middle of the combustion tube, and each secondary air inlet is connected to a secondary air inlet pipe; The electronic igniter is arranged on the combustion tube between the primary air inlet and the secondary air inlet; An air injection pipe is provided between each secondary air inlet pipe and the combustion pipe near the flame outlet, and the angle between the axial center line of the connection between the air injection pipe and the combustion pipe and the axial center line of the combustion pipe is an acute angle; The primary air inlet pipe and the secondary air inlet pipe are both connected to the air supply device, and the flow rate entering the combustion pipe through the primary air inlet pipe is smaller than the flow rate entering the combustion pipe through the secondary air inlet pipe.

2. The powdered activated carbon incineration feeding device according to claim 1, characterized in that: The activated carbon inlet is connected to the waste activated carbon supply device.

3. The powdered activated carbon incineration feeding device according to claim 1, characterized in that: The primary air inlet is located in the low-temperature section of the combustion tube, and low-nitrogen combustion is ensured by small flow and low excess air coefficient. The secondary air inlet is located in the high-temperature section of the combustion tube, and large flow and high excess air coefficient are used to reduce the temperature, thereby ensuring low-nitrogen combustion.

4. The powdered activated carbon incineration feeding device according to claim 1, characterized in that: The crater is a conical mouth, the material of the crater is Hastelloy, and the crater is connected to the incinerator.

5. The powdered activated carbon incineration feeding device according to claim 1, characterized in that: It also includes fire-spraying bricks, and a powdered activated carbon incineration feeding device is arranged in the fire-spraying bricks.

6. The powdered activated carbon incineration feeding device according to claim 1, characterized in that: The electronic igniter is an automatic pulse electronic igniter.

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