A waste incinerator coupled plasma melting furnace processing device and method

Abstract

The present invention discloses a waste incinerator coupled plasma melting furnace treatment device, including a grate furnace waste incineration system, the grate furnace waste incineration system is connected to a cyclone separator through a pipeline, a silo is arranged below the cyclone separator, the bottom discharge port of the cyclone separator is connected to the feed port of the silo through a pipeline; the side wall of the silo is connected to a diaphragm pump through a pipeline, the diaphragm pump is also connected to a plasma melting furnace through a pipeline, and the plasma melting furnace is connected to a secondary combustion chamber through a pipeline; the top outlet of the cyclone separator is also connected to the inlet of the secondary combustion chamber through a pipeline; a hopper is arranged above the plasma melting furnace, and the hopper is connected to the feed port of the plasma melting furnace through a pipeline. The device reduces the NOx in the plasma melting furnace by using a small amount of unburned gas and particulate matter in the waste incinerator, and the secondary combustion chamber does not need additional fuel. A waste incinerator coupled plasma melting furnace treatment method is also provided.

Description

Technical Field

[0001] The present invention belongs to the technical field of domestic waste incineration equipment, and specifically relates to a waste incinerator coupled plasma melting furnace processing device, and also relates to a waste incinerator coupled plasma melting furnace processing method. Background Art

[0002] During the incineration process of the garbage incineration grate furnace, 3-5% of garbage incineration fly ash will be produced. The content of heavy metals and dioxins in the garbage incineration fly ash is high, and it is a hazardous waste. The existing technology mainly uses cement solidification, melt solidification, chemical agent solidification, etc. After the solidified fly ash meets the landfill requirements, it can be landfilled as ordinary waste.

[0003] The plasma melting furnace uses the 4000-5000℃ high-temperature plasma generated by the plasma torch to heat the fly ash, which can quickly melt the fly ash into liquid and completely decompose dioxins. The liquid fly ash is quenched with extremely cold water to form a vitreous body, and the heavy metals are solidified in the vitreous body lattice. Some combustible gases such as CO are formed in the fly ash, and the secondary combustion chamber is required to burn this part of the gas, and the secondary combustion chamber needs fuel to assist combustion.

[0004] The high temperature of the plasma torch produces a large amount of NOx. The NOx in the flue gas of the melting furnace using a plasma torch with air as the medium is 20000mg / m 3 The secondary combustion chamber requires a certain amount of fuel, and the uneven combustion of the fuel may produce harmful gases, and a certain amount of fuel storage equipment and costs are required. In view of these shortcomings, the present invention aims to use a small amount of unburned gas and particulate matter in the waste incinerator to reduce NOx in the plasma melting furnace, and the secondary combustion chamber does not require additional fuel. Summary of the invention

[0005] The object of the present invention is to provide a waste incinerator coupled plasma melting furnace treatment device, which reduces NOx in the plasma melting furnace by using a small amount of unburned gas and particulate matter in the waste incinerator, and the secondary combustion chamber does not need additional fuel.

[0006] The second object of the present invention is to provide a waste incinerator coupled plasma melting furnace treatment method.

[0007] The technical solution adopted by the present invention is a waste incinerator coupled plasma melting furnace processing device, including a grate furnace waste incineration system, the grate furnace waste incineration system is connected to a cyclone separator through a pipeline, a silo is arranged below the cyclone separator, and the bottom discharge port of the cyclone separator is connected to the feed port of the silo through a pipeline; the side wall of the silo is connected to a diaphragm pump through a pipeline, the diaphragm pump is also connected to a plasma melting furnace through a pipeline, and the plasma melting furnace is connected to a secondary combustion chamber through a pipeline; the top outlet of the cyclone separator is also connected to the inlet of the secondary combustion chamber through a pipeline; a hopper is arranged above the plasma melting furnace, and the hopper is connected to the feed port of the plasma melting furnace through a pipeline.

[0008] The present invention is also characterized in that

[0009] The grate furnace waste incineration system comprises a chimney, a dust collector, a desulfurization tower and a waste incinerator which are connected in sequence. The discharge port of the waste incinerator is connected to the feed port of the cyclone separator through a pipeline.

[0010] The side wall of the silo is also connected to a nitrogen pipeline.

[0011] The dust collector is a bag dust collector.

[0012] A trolley is also provided below the plasma melting furnace.

[0013] The second technical solution adopted by the present invention is a waste incinerator coupled plasma melting furnace treatment method, using the above-mentioned device, and the specific steps are as follows:

[0014] Step 1, the garbage is crushed and put into the garbage incinerator, and the flue gas is processed by the desulfurization tower and the dust collector in turn, and fly ash is generated at the bottom of the desulfurization tower and the dust collector;

[0015] Step 2, the generated fly ash and a certain amount of co-solvent are put into a hopper and mixed evenly, and the large particles accumulated at the bottom of the secondary combustion chamber are put into the hopper;

[0016] Step 3, extracting flue gas accounting for 3-5% of the mass of the input garbage from the middle of the garbage incinerator, separating it through a cyclone separator, and the light combustible gas enters the secondary combustion chamber through a pipeline from the top of the cyclone separator, and the heavy combustible particles and part of the combustible gas enter the silo, and nitrogen is introduced into the lower part of the silo. Under the action of a diaphragm pump, the nitrogen carries the combustible particles and combustible gas into the plasma melting furnace;

[0017] Step 4: After the fly ash in the plasma melting furnace is melted, it is quenched with water to form a glass body. The low melting point substances in the fly ash are volatilized into the secondary combustion chamber and mixed with the combustible gas separated from the top of the cyclone separator to burn.

[0018] The present invention is also characterized in that

[0019] The additive in step 2 is: quartz sand or broken glass; the mass ratio of fly ash to the additive is: 1:0.3-0.5.

[0020] The beneficial effects of the present invention are as follows: the present invention is a waste incinerator coupled plasma melting furnace treatment device, which extracts a small amount of unburned gas and particulate matter from the waste incinerator, and the gas is used for combustion in the secondary combustion chamber of the plasma melting furnace flue gas treatment, and the particulate matter is used to reduce the NOx production in the plasma melting furnace. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a structural schematic diagram of a waste incinerator coupled plasma melting furnace processing device of the present invention;

[0022] Figure 2 The present invention is a flow chart of a waste incinerator coupled plasma melting furnace treatment method.

[0023] In the figure, 1. chimney, 2. dust collector, 3. desulfurization tower, 4. waste incinerator, 5. cyclone separator, 6 silo, 7. diaphragm pump, 8. hopper, 9. plasma melting furnace, 10. secondary combustion chamber, 11. trolley. DETAILED DESCRIPTION

[0024] The present invention is described in detail below with reference to the accompanying drawings and specific embodiments.

[0025] The present invention provides a waste incinerator coupled plasma melting furnace processing device, such as Figure 1 As shown, the grate furnace waste incineration system includes a grate furnace waste incineration system, which is connected to a cyclone separator 5 through a pipeline, a silo 6 is arranged below the cyclone separator 5, and the bottom discharge port of the cyclone separator 5 is connected with the feed port of the silo 6 through a pipeline; the side wall of the silo 6 is connected with a diaphragm pump 7 through a pipeline, and the diaphragm pump 7 is also connected with a plasma melting furnace 9 through a pipeline, and the plasma melting furnace 9 is connected with a secondary combustion chamber 10 through a pipeline; the top outlet of the cyclone separator 5 is also connected with the inlet of the secondary combustion chamber 10 through a pipeline; a hopper 8 is arranged above the plasma melting furnace 9, and the hopper 8 is connected with the feed port of the plasma melting furnace 9 through a pipeline.

[0026] The grate furnace waste incineration system comprises a chimney 1, a dust collector 2, a desulfurization tower 3 and a waste incinerator 4 which are connected in sequence, and the discharge port of the waste incinerator 4 is connected to the feed port of the cyclone separator 5 through a pipeline.

[0027] The side wall of the silo 6 is also connected with a nitrogen pipeline.

[0028] The dust collector 2 is a bag dust collector.

[0029] A trolley 11 is also provided below the plasma melting furnace 9 , and the trolley 11 is used to transport the glass body discharged from the plasma melting furnace 9 .

[0030] The present invention also provides a waste incinerator coupled plasma melting furnace treatment method, using the above-mentioned device, such as Figure 2 As shown, the specific steps are as follows:

[0031] Step 1, crushing the garbage and putting it into the garbage incinerator 4, the flue gas is processed by the desulfurization tower 3 and the dust collector 2 in turn, and fly ash is generated at the bottom of the desulfurization tower 3 and the dust collector 2;

[0032] Step 2, the generated fly ash and a certain amount of co-solvent are put into the hopper 8 and mixed evenly, the large particles accumulated at the bottom of the secondary combustion chamber 10 are put into the hopper 8, and the gas at the outlet of the secondary combustion chamber 10 is treated by the flue gas treatment system; the flue gas treatment system is composed of a heat exchanger, a denitrification SNCR, a dust collector, a deacidification tower and a chimney, which is a general equipment, the end of the secondary combustion chamber is connected to the heat exchanger, the end of the heat exchanger is connected to the denitrification SNCR, the end of the denitrification SNCR is connected to the dust collector, the end of the dust collector is connected to the denitrification tower, and the end of the denitrification tower is connected to the chimney;

[0033] Step 3, extracting flue gas accounting for 3-5% of the mass of the input garbage from the middle of the garbage incinerator 4, separating it through the cyclone separator 5, and the light combustible gas enters the secondary combustion chamber 10 through the pipeline from the top of the cyclone separator 5, and the heavy combustible particles and part of the combustible gas enter the silo 6. Nitrogen is introduced into the lower part of the silo 6. Under the action of the diaphragm pump 7, the nitrogen carries the combustible particles and the combustible gas into the plasma melting furnace 9, which can reduce the NOx generated by the plasma torch from 20000mg / m 3 Reduced to 400 mg / m 3 .

[0034] Step 4, the fly ash in the plasma melting furnace 9 is melted and quenched with water to form a glass body, which is transported away by the trolley 11. The low-melting-point substances in the fly ash are volatilized into the secondary combustion chamber 10 and mixed with the combustible gas separated from the top of the cyclone separator 5 to burn, thereby removing harmful substances such as CO. The secondary combustion chamber 10 does not require fuel for combustion.

[0035] The additive in step 2 is: quartz sand or broken glass; the mass ratio of fly ash to the additive is: 1:0.3-0.5.

[0036] Example 1

[0037] The present invention also provides a waste incinerator coupled plasma melting furnace treatment method, using the above-mentioned device, such as Figure 2 As shown, the specific steps are as follows:

[0038] Step 1, crushing the garbage and putting it into the garbage incinerator 4, the flue gas is processed by the desulfurization tower 3 and the dust collector 2 in turn, and fly ash is generated at the bottom of the desulfurization tower 3 and the dust collector 2;

[0039] Step 2, the generated fly ash and a certain amount of co-solvent are put into the hopper 8 and mixed evenly, the large particles accumulated at the bottom of the secondary combustion chamber 10 are put into the hopper 8, and the gas at the outlet of the secondary combustion chamber 10 is treated by the flue gas treatment system; the flue gas treatment system is composed of a heat exchanger, a denitrification SNCR, a dust collector, a deacidification tower and a chimney, which is a general equipment, the end of the secondary combustion chamber is connected to the heat exchanger, the end of the heat exchanger is connected to the denitrification SNCR, the end of the denitrification SNCR is connected to the dust collector, the end of the dust collector is connected to the denitrification tower, and the end of the denitrification tower is connected to the chimney;

[0040] Step 3, extracting flue gas accounting for 3% of the mass of the input garbage from the middle of the garbage incinerator 4, separating it through the cyclone separator 5, and the light combustible gas enters the secondary combustion chamber 10 through the pipeline from the top of the cyclone separator 5, and the heavy combustible particles and part of the combustible gas enter the silo 6. Nitrogen is introduced into the lower part of the silo 6. Under the action of the diaphragm pump 7, the nitrogen carries the combustible particles and the combustible gas into the plasma melting furnace 9, which can reduce the NOx generated by the plasma torch from 20000mg / m 3 Reduced to 400 mg / m 3 .

[0041] Step 4, the fly ash in the plasma melting furnace 9 is melted and quenched with water to form a glass body, which is transported away by the trolley 11. The low-melting-point substances in the fly ash are volatilized into the secondary combustion chamber 10 and mixed with the combustible gas separated from the top of the cyclone separator 5 to burn, thereby removing harmful substances such as CO. The secondary combustion chamber 10 does not require fuel for combustion.

[0042] The additive in step 2 is: quartz sand or broken glass; the mass ratio of fly ash to the additive is: 1:0.3.

[0043] Example 2

[0044] The present invention also provides a waste incinerator coupled plasma melting furnace treatment method, using the above-mentioned device, such as Figure 2 As shown, the specific steps are as follows:

[0045] Step 1, crushing the garbage and putting it into the garbage incinerator 4, the flue gas is processed by the desulfurization tower 3 and the dust collector 2 in turn, and fly ash is generated at the bottom of the desulfurization tower 3 and the dust collector 2;

[0046] Step 2, the generated fly ash and a certain amount of co-solvent are put into the hopper 8 and mixed evenly, the large particles accumulated at the bottom of the secondary combustion chamber 10 are put into the hopper 8, and the gas at the outlet of the secondary combustion chamber 10 is treated by the flue gas treatment system; the flue gas treatment system is composed of a heat exchanger, a denitrification SNCR, a dust collector, a deacidification tower and a chimney, which is a general equipment, the end of the secondary combustion chamber is connected to the heat exchanger, the end of the heat exchanger is connected to the denitrification SNCR, the end of the denitrification SNCR is connected to the dust collector, the end of the dust collector is connected to the denitrification tower, and the end of the denitrification tower is connected to the chimney;

[0047] Step 3, extract the flue gas accounting for 5% of the mass of the input garbage from the middle of the garbage incinerator 4, separate it through the cyclone separator 5, the light combustible gas enters the secondary combustion chamber 10 through the pipeline from the top of the cyclone separator 5, and the heavy combustible particles and part of the combustible gas enter the silo 6. Nitrogen is introduced into the lower part of the silo 6. Under the action of the diaphragm pump 7, the nitrogen carries the combustible particles and combustible gas into the plasma melting furnace 9, which can reduce the NOx generated by the plasma torch from 20000mg / m 3 Reduced to 400 mg / m 3 .

[0048] Step 4, the fly ash in the plasma melting furnace 9 is melted and quenched with water to form a glass body, which is transported away by the trolley 11. The low-melting-point substances in the fly ash are volatilized into the secondary combustion chamber 10 and mixed with the combustible gas separated from the top of the cyclone separator 5 to burn, thereby removing harmful substances such as CO. The secondary combustion chamber 10 does not require fuel for combustion.

[0049] The additive in step 2 is: quartz sand or broken glass; the mass ratio of fly ash to the additive is: 1:0.5.

[0050] Example 3

[0051] The present invention also provides a waste incinerator coupled plasma melting furnace treatment method, using the above-mentioned device, such as Figure 2 As shown, the specific steps are as follows:

[0052] Step 1, crushing the garbage and putting it into the garbage incinerator 4, the flue gas is processed by the desulfurization tower 3 and the dust collector 2 in turn, and fly ash is generated at the bottom of the desulfurization tower 3 and the dust collector 2;

[0053] Step 2, the generated fly ash and a certain amount of co-solvent are put into the hopper 8 and mixed evenly, the large particles accumulated at the bottom of the secondary combustion chamber 10 are put into the hopper 8, and the gas at the outlet of the secondary combustion chamber 10 is treated by the flue gas treatment system; the flue gas treatment system is composed of a heat exchanger, a denitrification SNCR, a dust collector, a deacidification tower and a chimney, which is a general equipment, the end of the secondary combustion chamber is connected to the heat exchanger, the end of the heat exchanger is connected to the denitrification SNCR, the end of the denitrification SNCR is connected to the dust collector, the end of the dust collector is connected to the denitrification tower, and the end of the denitrification tower is connected to the chimney;

[0054] Step 3, extract the flue gas accounting for 4% of the mass of the input garbage from the middle of the garbage incinerator 4, separate it through the cyclone separator 5, the light combustible gas enters the secondary combustion chamber 10 through the pipeline from the top of the cyclone separator 5, and the heavy combustible particles and part of the combustible gas enter the silo 6. Nitrogen is introduced into the lower part of the silo 6. Under the action of the diaphragm pump 7, the nitrogen carries the combustible particles and combustible gas into the plasma melting furnace 9, which can reduce the NOx generated by the plasma torch from 20000mg / m 3 Reduced to 400 mg / m 3 .

[0055] Step 4, the fly ash in the plasma melting furnace 9 is melted and quenched with water to form a glass body, which is transported away by the trolley 11. The low-melting-point substances in the fly ash are volatilized into the secondary combustion chamber 10 and mixed with the combustible gas separated from the top of the cyclone separator 5 to burn, thereby removing harmful substances such as CO. The secondary combustion chamber 10 does not require fuel for combustion.

[0056] The additive in step 2 is: quartz sand or broken glass; the mass ratio of fly ash to the additive is: 1:0.4.

Claims

1. A waste incinerator coupled plasma melting furnace treatment device, characterized in that: The invention comprises a grate furnace waste incineration system, wherein the grate furnace waste incineration system is connected to a cyclone separator (5) via a pipeline, a silo (6) is arranged below the cyclone separator (5), and a bottom discharge port of the cyclone separator (5) is connected to a feed port of the silo (6) via a pipeline; a diaphragm pump (7) is connected to a side wall of the silo (6) via a pipeline, the diaphragm pump (7) is also connected to a plasma melting furnace (9) via a pipeline, and the plasma melting furnace (9) is connected to a secondary combustion chamber (10) via a pipeline; a top outlet of the cyclone separator (5) is also connected to an inlet of the secondary combustion chamber (10) via a pipeline; a hopper (8) is arranged above the plasma melting furnace (9), and the hopper (8) is connected to the feed port of the plasma melting furnace (9) via a pipeline; The grate furnace waste incineration system comprises a chimney (1), a dust collector (2), a desulfurization tower (3) and a waste incinerator (4) which are connected in sequence, and the discharge port of the waste incinerator (4) is connected to the feed port of the cyclone separator (5) through a pipeline; The side wall of the silo (6) is also connected to a nitrogen pipeline; The dust collector (2) is a bag dust collector; A trolley (11) is also provided below the plasma melting furnace (9).

2. A waste incinerator coupled plasma melting furnace treatment method, using the device as claimed in claim 1, characterized in that: The specific steps are as follows: Step 1, crushing the garbage and putting it into a garbage incinerator (4), and the flue gas is processed by a desulfurization tower (3) and a dust collector (2) in sequence, and fly ash is generated at the bottom of the desulfurization tower (3) and the dust collector (2); Step 2, the generated fly ash and a certain amount of co-solvent are put into a hopper (8) and mixed evenly, and the large particles accumulated at the bottom of the secondary combustion chamber (10) are put into the hopper (8); The additive in step 2 is: quartz sand or broken glass; the mass ratio of fly ash to additive is: 1:0.3~0.5; Step 3, extracting flue gas accounting for 3 to 5% of the mass of the input waste from the middle of the waste incinerator (4), separating the flue gas through a cyclone separator (5), and allowing the light combustible gas to enter the secondary combustion chamber (10) through a pipeline from the top of the cyclone separator (5), and allowing the heavy combustible particles and part of the combustible gas to enter the silo (6). Nitrogen is introduced into the lower part of the silo (6), and under the action of a diaphragm pump (7), the nitrogen carries the combustible particles and the combustible gas into the plasma melting furnace (9); Step 4, the fly ash in the plasma melting furnace (9) is melted and then quenched with water to form a glass body, and the low melting point substances in the fly ash are volatilized into the secondary combustion chamber (10) and mixed with the combustible gas separated at the top of the cyclone separator (5) for combustion.

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