Treatment equipment and method for household garbage incineration fly ash

Abstract

The invention discloses household garbage incineration fly ash treatment equipment and method.The household garbage incineration fly ash treatment equipment comprises an equipment body, the equipment body comprises an incinerator, a discharge pipe and a roller furnace, a stepped fire grate is installed in the incinerator, and the side face, on the lower side of the stepped fire grate, of the incinerator is connected with the roller furnace through the discharge pipe; the inlet end of the discharge pipe is positioned on the incinerator on the outer side of the outer flame of the stepped fire grate, and an electromagnetic coil for heating is mounted in the drum furnace; and an opening a connected with a discharge pipe is formed in one side of the roller furnace. According to the invention, the roller furnace is provided with the circulating pipeline, and the other end of the circulating pipeline is connected with the incinerator to form a closed-loop system, so that the treated gas can return to the incinerator and continues to be combusted through the outer flame of the fire grate, the degree of removing the dioxin in the gas is enhanced, and the dioxin is thoroughly removed through the high temperature of the outer flame; the combustion efficiency is improved; and the emission of harmful gas is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of waste incineration fly ash, and in particular to a treatment device and method for domestic waste incineration fly ash. Background Art

[0002] Fly ash is a fine particle emitted into the air along with the flue gas when burning solid fuels (such as coal, garbage, etc.). Fly ash may contain harmful substances (such as heavy metals, dioxins, etc.), so it needs to be treated. Fly ash combustion treatment is usually to reduce its impact on the environment or to recover useful components.

[0003] At present, the current fly ash treatment and combustion method is generally to wash the fly ash with water and then enter the incinerator for combustion, and then directly discharge it from the incinerator for granulation. This method has the problem of incomplete combustion of dioxins in the fly ash combustion gas. For this reason, we have designed a treatment equipment and method for domestic waste incineration fly ash to solve the above problems. Summary of the invention

[0004] The purpose of the present invention is to solve the shortcomings of the prior art and to propose a device and method for treating fly ash from the incineration of domestic waste.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] A device for treating fly ash from the incineration of domestic waste, comprising a device body, the device body comprising an incinerator, a discharge pipe and a drum furnace, the incinerator is equipped with a stepped grate, the side of the incinerator on the lower side of the stepped grate is connected to the drum furnace through the discharge pipe, the inlet end of the discharge pipe is located on the incinerator outside the outer flame of the stepped grate, and the drum furnace is equipped with an electromagnetic coil for heating;

[0007] A port a connected to a discharge pipe is provided on one side of the drum furnace, a port b is provided on the other side of the drum furnace, and a circulation pipe is installed between the drum furnace and the incinerator. A fly ash inlet c is provided on the top side of the drum furnace, and a fly ash slag outlet d is provided on the bottom side of the drum furnace.

[0008] A method for treating fly ash from the incineration of domestic waste, specifically comprising the following steps:

[0009] Step S1, burning fly ash: the flue gas enters the drum furnace from the waste incinerator;

[0010] Step S2, after the smoke is discharged from the drum furnace, it passes through the circulation pipeline and returns to the waste incinerator;

[0011] Step S3, during the operation of the drum furnace, fly ash enters the drum furnace from the fly ash inlet c;

[0012] Step S4: During the operation of the drum furnace, fly ash is discharged from the drum furnace through the fly ash outlet d.

[0013] Preferably, the interior of the drum furnace is also paved with refractory bricks.

[0014] Preferably, the combustion temperature of the outer flame on the stepped grate is 800-1000 degrees, and the time is 1h-2h.

[0015] Preferably, the interior of the incinerator is in a negative pressure state.

[0016] Preferably, the discharge method of the fly ash inside the drum furnace can be granulation or non-granulation.

[0017] Preferably, a temperature detection head is also installed on the incinerator.

[0018] Compared with the prior art, the beneficial effects of the present invention are as follows: in the present invention, the drum furnace is provided with a circulation pipe, the other end of the circulation pipe is connected to the incinerator to form a closed-loop system, which enables the treated gas to return to the incinerator and continue the combustion process through the outer flame of the grate. The temperature of the outer flame is the highest, which enhances the degree of dioxin removal in the gas, and the dioxin is completely removed by the high temperature of the outer flame, thereby improving the combustion efficiency and reducing the emission of harmful gases. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of the structure of a device and method for treating fly ash from incineration of domestic waste proposed by the present invention;

[0020] Figure 2 The present invention provides a method flow chart of a device and method for treating fly ash from incineration of domestic waste.

[0021] In the figure: 1 incinerator, 2 stepped grate, 3 drum furnace. DETAILED DESCRIPTION

[0022] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0023] Reference Figure 1 A treatment device for fly ash from the incineration of domestic waste, comprising a device body, the device body comprising an incinerator 1, a discharge pipe and a drum furnace 3, a stepped grate 2 is installed in the incinerator 1, the side of the incinerator 1 below the stepped grate 2 is connected to the drum furnace 3 through the discharge pipe, the inlet end of the discharge pipe is located on the incinerator outside the outer flame of the stepped grate 2, and the drum furnace 3 is installed with an electromagnetic coil for heating;

[0024] A port a connected to a discharge pipe is provided on one side of the drum furnace 3, a port b is provided on the other side of the drum furnace 3, and a circulation pipeline is installed between the drum furnace 3 and the incinerator 1, a fly ash inlet c is provided on one side of the top of the drum furnace 3, and a fly ash slag outlet d is provided on one side of the bottom of the drum furnace 3;

[0025] A method for treating fly ash from the incineration of domestic waste, specifically comprising the following steps:

[0026] Step S1, burning fly ash: the flue gas enters the drum furnace 3 from the waste incinerator 1;

[0027] Step S2, after the smoke is discharged from the drum furnace 3, it passes through the induced draft fan 4 and returns to the waste incinerator 1;

[0028] Step S3, during the operation of the drum furnace 3, fly ash enters the drum furnace 3 from the fly ash inlet c;

[0029] Step S4: During the operation of the drum furnace 3, fly ash is discharged from the drum furnace 3 through the fly ash outlet d.

[0030] More specifically, the inside of the drum furnace 3 is paved with refractory bricks, the combustion temperature of the outer flame on the stepped grate 2 is 800-1000 degrees, the time is 1h-2h, the inside of the incinerator 1 is in a negative pressure state, and a main induced draft fan is connected to the top of the incinerator 1. The discharge method of fly ash inside the drum furnace 3 can be selected as granulation or non-granulation, and a temperature detection head is also installed on the incinerator 1.

[0031] During operation, the fly ash that has been washed with water is sent into the incinerator 1 and falls layer by layer through the stepped grate 2; this design ensures that the fly ash can be fully exposed to the high temperature environment during the falling process.

[0032] In this embodiment, harmful substances can be eliminated from fly ash: the outer flame temperature of the incinerator 1 is set at 800-1000 degrees, and the maintenance time is 1-2 hours. This high temperature can effectively decompose and eliminate harmful substances such as dioxins in fly ash.

[0033] At the same time, the exhaust gas is burned in a cycle:

[0034] Ash treatment: After completing the previous combustion steps, the fly ash burned on the stepped grate 2 will be guided to the drum furnace 3, where the ash and flue gas are reheated to achieve further combustion and reaction.

[0035] Gas circulation: The drum furnace 3 is provided with a circulation pipe, the other end of which is connected to the incinerator 1 to form a closed-loop system, which allows the treated gas to return to the incinerator and continue the combustion process through the outer flame of the grate. The temperature of the outer flame is the highest, which enhances the degree of dioxin removal in the gas. The high temperature of the outer flame can completely remove dioxins, improve combustion efficiency and reduce the emission of harmful gases.

[0036] Final emission: After cyclic combustion, the treated gas is discharged through the incinerator 1. At this time, most of the harmful gases and particulate matter have been removed by high-temperature incineration and chemical reaction.

[0037] It should be noted that this embodiment also has the following advantages when working:

[0038] Refractory materials: The interior of the drum furnace 3 is paved with refractory bricks to improve the durability and thermal efficiency of the equipment.

[0039] Negative pressure design: The incinerator 1 is maintained in a negative pressure state, which helps to prevent the leakage of harmful gases and ensure the airtightness and safety of the system.

[0040] Temperature detection: The incinerator 1 is equipped with a temperature detection head, which can monitor the temperature inside the furnace in real time to ensure that the combustion process is carried out within a safe range.

[0041] Through the above steps, the combustion treatment process of fly ash becomes efficient and safe, which can effectively reduce environmental pollution and improve resource recycling.

[0042] The basic principles, main features and advantages of the present invention are shown and described above. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention. The scope of the present invention is defined by the attached claims and their equivalents.

Claims

1. A device for treating fly ash from the incineration of domestic waste, comprising a device body, characterized in that: The equipment body comprises an incinerator (1), a discharge pipe and a drum furnace (3); a stepped grate (2) is installed in the incinerator (1); the side of the incinerator (1) below the stepped grate (2) is connected to the drum furnace (3) via the discharge pipe; the inlet end of the discharge pipe is located on the incinerator outside the outer flame of the stepped grate (2); and an electromagnetic coil is installed inside the drum furnace (3) for heating; A port a connected to a discharge pipe is provided on one side of the drum furnace (3), a port b is provided on the other side of the drum furnace (3), and a circulation pipeline is installed between the drum furnace (3) and the incinerator (1), a fly ash inlet c is provided on the top side of the drum furnace (3), and a fly ash slag outlet d is provided on the bottom side of the drum furnace (3).

2. A method for treating fly ash from incineration of domestic waste based on the equipment of claim 1, characterized in that: Specifically include the following steps: Step S1, burning fly ash: smoke enters the drum furnace (3) from the waste incinerator (1); Step S2, after the smoke is discharged from the drum furnace (3), it passes through the circulation pipeline and returns to the garbage incinerator (1); Step S3, during the operation of the drum furnace (3), fly ash enters the drum furnace (3) from the fly ash inlet c; Step S4: During the operation of the drum furnace (3), fly ash is discharged from the drum furnace (3) through the fly ash outlet d.

3. The method for treating fly ash from incineration of domestic waste according to claim 2, characterized in that: The interior of the drum furnace (3) is also paved with refractory bricks.

4. The method for treating fly ash from incineration of domestic waste according to claim 2, characterized in that: The combustion temperature of the outer flame on the stepped grate (2) is 800-1000 degrees, and the combustion time is 1h-2h.

5. The method for treating fly ash from incineration of domestic waste according to claim 2, characterized in that: The interior of the incinerator (1) is in a negative pressure state.

6. The method for treating fly ash from incineration of domestic waste according to claim 2, characterized in that: The discharge method of the fly ash inside the drum furnace (3) can be selected as granulation or non-granulation.

7. The method for treating fly ash from incineration of domestic waste according to claim 2, characterized in that: The incinerator (1) is also equipped with a temperature detection head.

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