CN212108427U - Grate furnace plasma flame stabilizing device of household garbage incineration power plant - Google Patents
Grate furnace plasma flame stabilizing device of household garbage incineration power plant Download PDFInfo
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- CN212108427U CN212108427U CN202020658602.7U CN202020658602U CN212108427U CN 212108427 U CN212108427 U CN 212108427U CN 202020658602 U CN202020658602 U CN 202020658602U CN 212108427 U CN212108427 U CN 212108427U
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Abstract
A plasma flame stabilizing device of a grate furnace of a household garbage incineration power plant comprises an incinerator hearth and a plasma flame generator, wherein the incinerator hearth comprises a grate, a front arch, a rear arch, a left side wall and a right side wall, the front arch, the rear arch and the left side wall and the right side wall are positioned above the grate, the incinerator hearth is sequentially divided into a drying area, a combustion area and a burning area from top to bottom, the incinerator hearth is further provided with a garbage inlet, a flue outlet and a waste residue outlet, the plasma flame generator is arranged on the front arch and/or the rear arch and/or the left side wall and the right side wall of the incinerator hearth, and the plasma flame generator is used for respectively providing high-temperature plasma flame flow for the drying area and/or the combustion area and/or the burning area, catalyzing combustion supporting and stabilizing burning.
Description
Technical Field
The utility model relates to a flame stabilizing device of a grate furnace, in particular to a plasma flame stabilizing device for the grate furnace of a household garbage incineration power plant.
Background
The municipal waste incineration treatment technology is more and more concerned in China due to the characteristics of harmlessness, reduction, better resource effect and the like. Domestic garbage has low heat value and large fluctuation range, and the components are complex and have high water content, so that the domestic garbage can not meet the temperature requirement of an incineration hearth; because the fluctuation range of the heat value of the garbage is large, the incinerator is difficult to ensure that the temperature of the chamber in the incineration process is constantly kept stable at more than 850 ℃, the decomposition condition and the combustion stability of harmful and toxic substance dioxin are difficult to ensure, and the influence of the temperature fluctuation of the garbage burned in the garbage incineration power plant on the fluctuation of a steam turbine and the generated energy is difficult to avoid. The existing waste incineration power plant mostly adopts auxiliary fuel oil to support combustion and stabilize combustion, and needs to consume a large amount of fuel oil; the demand of fuel oil is increasing, the global petroleum resources are becoming short, the price of crude oil is rising, and the control of the large consumption of fuel oil is the reality which has to be faced by the power generation industry. Technical workers change a grate furnace fuel oil auxiliary combustion system for a waste incineration power plant which is frequently operated at present into a coal powder auxiliary combustor, for example, a grate type waste incinerator oxygen enrichment coal powder ignition stable combustion device disclosed by CN201320040634.0, which replaces fuel oil with coal powder, so that fuel oil is saved, but the coal powder generated by oxygen enrichment combustion has more problems, firstly, a large amount of NOX and acid gas generated by oxygen enrichment combustion are difficult to treat, although a desulfurization and denitrification device is generally arranged to treat flue gas, the coal powder oxygen enrichment combustion can greatly improve the desulfurization and denitrification cost, so that the power generation cost is greatly improved; secondly, the combustion efficiency of the pulverized coal is low, the condition of low burnout rate still exists although oxygen enrichment is adopted, the cost is increased in industrial operation, and the garbage power generation is not facilitated; thirdly, the coal powder combustion reaction process is complex, and the stable combustion controllability is relatively difficult.
In summary, in the power generation by burning garbage, the temperature of the burning furnace can fluctuate greatly due to the complex components, large moisture content and large fluctuation range of heat value of the garbage, the burning rate is low, and toxic and harmful substances such as dioxin and the like are easily generated to harm human health.
Disclosure of Invention
The utility model aims to solve the technical problem that, overcome the defect that prior art exists, provide a simple structure, control and use more convenient, need not the fire-coal combustion-supporting grate furnace temperature stability that can guarantee waste incineration power plant of burning of fuel, guarantee that the furnace internal temperature is greater than or equal to 850 ℃, guarantee steam boiler heat stability, effectively improve the generated energy of per ton domestic waste burning, reduce the grate furnace plasma flame stabilising arrangement of waste incineration power plant electricity generation cost.
The utility model provides a technical scheme that its technical problem adopted is: the utility model provides a grate furnace plasma flame stabilising arrangement of domestic waste incineration power plant, includes burns burning furnace, it includes the grate and is located the preceding arch of grate top, back arch and controls the lateral wall to burn burning furnace from last to dividing into drying area, combustion area and burning out the district in proper order down, it still is equipped with rubbish entry, flue outlet and waste residue export to burn burning furnace, plasma flame generator sets up on burning furnace's preceding arch and/or back arch and/or control the lateral wall, provides high temperature plasma flame stream for drying area and/or combustion area and/or burning out the district respectively, and the catalytic combustion-supporting stabilizes waste incineration.
Furthermore, the flue outlet and/or the waste residue outlet are/is also provided with a plasma flame generator for purifying flue gas and outlet waste residue, so that the aim of secondary purification of the flue gas is fulfilled.
Further, the plasma flame generator comprises a discharge part, a conductive part, an insulating part and an air supply part, wherein the discharge part is connected with the conductive part through the insulating part, the central axes of the discharge part and the conductive part are positioned on the same straight line, the air supply part provides compressed air for a gap between the discharge part and the conductive part, and when the discharge part and the conductive part are connected with high-voltage high-frequency electricity, plasma flame flow is generated.
Further, the plasma flame generator also comprises a power supply device, wherein the power supply device is respectively connected with the discharge part and the conductive part, or one end of the power supply device is connected with the discharge part, and the other end of the power supply device is grounded with the conductive part, and when the power supply device supplies power, a high-voltage arc can be formed between the discharge part and the conductive part.
Further, the discharge part is columnar, and the conductive part is cylindrical or horn-shaped or is in a double-head horn shape which is firstly reduced and then expanded.
Further, the plasma flame generator is provided with a magnetic control component, and the magnetic control component is an electromagnetic coil arranged on the conductive component and/or a permanent magnet component arranged at the outlet of the conductive component. By using the magnetron component, the direction of the plasma flame flow can be more accurately controlled.
Furthermore, a temperature sensor and a controller are also arranged. By using the plasma flame generator and the flame generator, the temperature range of each area in the furnace of the furnace grate can be accurately adjusted and the number of the started plasma flame generators can be controlled.
Further, the plasma flame generator comprises a plasma torch and/or an electric flame device which can generate flame.
Compared with the prior art, the utility model breaks through the need of auxiliary fuel for the existing grate garbage incinerator, such as fuel oil or pulverized coal combustion-supporting stable combustion, and can clean combustion-supporting stable combustion by directly adopting plasma flame (electric flame), practices show that the temperature stability and controllability of the grate garbage incinerator during operation can be greatly improved, and the burn-out rate of domestic garbage is improved; the method is environment-friendly, can effectively control the temperature in the hearth of the incinerator to be more than 850 ℃, and does not generate toxic gas dioxin; the device has the advantages of simple structure, easy installation and simple and convenient operation, can effectively improve the generated energy of burning each ton of domestic garbage, and reduces the production and operation cost of a garbage incineration power plant; the power generation output is even, the stable operation of the boiler of the waste incineration power plant and the stable assurance of the generated energy are provided, and the technical transformation or the improvement of the existing waste incineration power plant are easy to be carried out.
Drawings
Fig. 1 is a schematic structural diagram of embodiment 1 of the present invention;
FIG. 2 is a schematic view of the electrode structure in embodiment 1 shown in FIG. 1;
FIG. 3 is a view of the electrode A-A in the embodiment 1 shown in FIG. 2;
fig. 4 is a schematic structural diagram of embodiment 2 of the present invention;
fig. 5 is a schematic structural diagram of embodiment 3 of the present invention.
In the figure, 1-incinerator hearth, 101-grate, 102-front arch, 103-rear arch, 104-left and right side walls, 105-drying zone, 106-combustion zone, 107-burn-out zone, 108-garbage inlet, 109-flue outlet, 110-waste residue outlet, 2-plasma flame generator, 201-discharge part, 202-conductive part, 203-insulating part, 204-gas supply part, 205-power supply device.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples.
Example 1
Referring to fig. 1 to 3, the present embodiment includes an incinerator furnace 1 and a plasma flame generator 2, where the incinerator furnace 1 includes a fire grate 101, a front arch 102, a rear arch 103, and left and right side walls 104, the incinerator furnace 1 is divided into a drying area 105, a combustion area 106, and a burnout area 107 from top to bottom, the incinerator furnace 1 is further provided with a garbage inlet 108, a flue outlet 109, and a waste residue outlet 110, and the plasma flame generator 2 is disposed at the front arch and the rear arch of the incinerator furnace 1, and respectively provides high-temperature plasma flame flow for the drying area and the combustion area, so as to catalyze combustion supporting and stabilize garbage incineration.
The plasma flame generator 2 comprises a discharge part 201, a conductive part 202, an insulating part 203 and a gas supply part 204, wherein the discharge part 201 is connected with the conductive part 202 through the insulating part 203, the discharge part 201 and the conductive part 202 are coaxial, the gas supply part 204 supplies compressed air to a gap between the discharge part 201 and the conductive part 203, and when the discharge part 201 and the conductive part 201 are connected with high-voltage high-frequency electricity, plasma flame flow is generated. The plasma flame generator further comprises a power supply device 205, the power supply device 205 is respectively connected with the discharging part 201 and the conductive part 202, and when the power supply device 205 supplies power, a high-voltage arc can be formed between the discharging part 201 and the conductive part 202.
The working process, after setting up the control temperature, utilize temperature sensor and furnace internal corresponding zone's plasma flame generator to constitute closed-loop control, control each district and furnace internal temperature and start-up quantity, temperature range is adjusted to the accuracy, guarantees furnace internal temperature, improves domestic waste's combustion stability, makes the rubbish burning more abundant, and the burn-out rate is higher. The practical operation conditions of the embodiment are as follows: the plasma flame generator 2 arranged in the embodiment can effectively improve the burnout rate of the domestic garbage during normal operation, can ensure that the temperature of a hearth is maintained between 850 ℃ and 950 ℃, and can improve the generated energy by 1.2 to 1.8 percent for each ton of domestic garbage on average; and after stable operation and multiple detections, the content of dioxin in the smoke is lower than 0.00001 ng TEQ/Nm 3.
Example 2
Referring to fig. 4, the present embodiment is different from embodiment 1 in that the plasma flame generators 2 are provided at the left and right sidewalls 104 of the incinerator furnace 1, and the front arch 102 and the rear arch 103 are not provided with the plasma flame generators 2.
The rest is the same as example 1.
Example 3
Referring to fig. 5, the present embodiment is different from embodiment 1 in that the plasma flame generator 2 is disposed on the front arch 102, the rear arch 103, and the left and right sidewalls 104 of the incinerator furnace 1, as well as the flue outlet 109 and the slag outlet 110.
The rest is the same as example 1.
Various modifications and variations of the embodiments of the present invention may be made by those skilled in the art, and they are still within the scope of the present invention, provided they are within the scope of the claims and their equivalents.
What is not described in detail in the specification is prior art that is well known to those skilled in the art.
Claims (10)
1. The utility model provides a grate furnace plasma flame stabilising arrangement of domestic waste incineration power plant, is including burning furnace, burn burning furnace and include the grate and be located the preceding arch of grate top, back arch and control the lateral wall, burn burning furnace from last to dividing into drying zone, combustion area and burn the ember district down in proper order, burn burning furnace still is equipped with garbage entry, flue export and waste residue export, its characterized in that: and plasma flame generators are arranged on the front arch and/or the rear arch and/or the left side wall and the right side wall of the incinerator hearth.
2. The plasma flame stabilizing apparatus of a grate furnace of a domestic waste incineration power plant according to claim 1, wherein: and the flue outlet and/or the waste residue outlet are/is also provided with a plasma flame generator.
3. The grate furnace plasma flame stabilizing device of a domestic waste incineration power plant according to claim 1 or 2, characterized in that: the plasma flame generator comprises a discharge part, a conductive part, an insulating part and an air supply part, wherein the discharge part is connected with the conductive part through the insulating part, and the central axes of the discharge part and the conductive part are positioned on the same straight line.
4. The grate furnace plasma flame stabilizing device of a domestic waste incineration power plant according to claim 3, characterized in that: the plasma flame generator comprises a power supply device, wherein the power supply device is respectively connected with the discharge part and the conductive part, or one end of the power supply device is connected with the discharge part, and the other end of the power supply device is grounded with the conductive part.
5. The grate furnace plasma flame stabilizing device of a domestic waste incineration power plant according to claim 3, characterized in that: the discharge component is columnar, and the conductive component is cylindrical or horn-shaped or is in a double-head horn shape which is firstly reduced and then expanded.
6. The plasma flame stabilizing apparatus of a grate furnace of a domestic waste incineration power plant according to claim 1, wherein: the plasma flame generator is provided with a magnetic control component, and the magnetic control component is an electromagnetic coil arranged on the conductive component and/or a permanent magnet at the outlet of the conductive component.
7. The plasma flame stabilizing apparatus of a grate furnace of a domestic waste incineration power plant according to claim 1, wherein: also comprises an automatic temperature control sensor and a controller.
8. The grate furnace plasma flame stabilizing device of a domestic waste incineration power plant according to claim 1 or 2, characterized in that: the plasma flame generator comprises a plasma torch and/or an electric flame device which can generate flame.
9. The grate furnace plasma flame stabilizing device of a domestic waste incineration power plant according to claim 3, characterized in that: the plasma flame generator comprises a plasma torch and/or an electric flame device which can generate flame.
10. The grate furnace plasma flame stabilizing device of a domestic waste incineration power plant according to claim 4, characterized in that: the plasma flame generator comprises a plasma torch and/or an electric flame device which can generate flame.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020658602.7U CN212108427U (en) | 2020-04-27 | 2020-04-27 | Grate furnace plasma flame stabilizing device of household garbage incineration power plant |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020658602.7U CN212108427U (en) | 2020-04-27 | 2020-04-27 | Grate furnace plasma flame stabilizing device of household garbage incineration power plant |
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| CN212108427U true CN212108427U (en) | 2020-12-08 |
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| CN202020658602.7U Active CN212108427U (en) | 2020-04-27 | 2020-04-27 | Grate furnace plasma flame stabilizing device of household garbage incineration power plant |
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| CN (1) | CN212108427U (en) |
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