CN114110618A - Combustion device for treating acrylonitrile wastewater - Google Patents
Combustion device for treating acrylonitrile wastewater Download PDFInfo
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- CN114110618A CN114110618A CN202111314593.5A CN202111314593A CN114110618A CN 114110618 A CN114110618 A CN 114110618A CN 202111314593 A CN202111314593 A CN 202111314593A CN 114110618 A CN114110618 A CN 114110618A
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- 239000002351 wastewater Substances 0.000 title claims abstract description 57
- NLHHRLWOUZZQLW-UHFFFAOYSA-N Acrylonitrile Chemical compound C=CC#N NLHHRLWOUZZQLW-UHFFFAOYSA-N 0.000 title claims abstract description 49
- 238000002485 combustion reaction Methods 0.000 title claims abstract description 40
- 238000007254 oxidation reaction Methods 0.000 claims abstract description 42
- 230000003647 oxidation Effects 0.000 claims abstract description 41
- 239000007921 spray Substances 0.000 claims abstract description 40
- 230000002093 peripheral effect Effects 0.000 claims abstract description 11
- 239000011521 glass Substances 0.000 claims abstract description 8
- 239000007789 gas Substances 0.000 claims description 31
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims description 25
- 239000003546 flue gas Substances 0.000 claims description 23
- 238000012544 monitoring process Methods 0.000 claims description 17
- 239000000919 ceramic Substances 0.000 claims description 12
- 238000009413 insulation Methods 0.000 claims description 12
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 9
- 239000011449 brick Substances 0.000 claims description 9
- 239000001301 oxygen Substances 0.000 claims description 9
- 229910052760 oxygen Inorganic materials 0.000 claims description 9
- 239000000835 fiber Substances 0.000 claims description 8
- 239000003921 oil Substances 0.000 claims description 8
- 239000002737 fuel gas Substances 0.000 claims description 7
- KZHJGOXRZJKJNY-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Si]=O.O=[Al]O[Al]=O.O=[Al]O[Al]=O.O=[Al]O[Al]=O KZHJGOXRZJKJNY-UHFFFAOYSA-N 0.000 claims description 6
- 229910052863 mullite Inorganic materials 0.000 claims description 6
- 238000005192 partition Methods 0.000 claims description 6
- 239000011094 fiberboard Substances 0.000 claims description 4
- 239000000295 fuel oil Substances 0.000 claims description 4
- 239000000779 smoke Substances 0.000 claims description 4
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 claims description 3
- 229910052804 chromium Inorganic materials 0.000 claims description 3
- 239000011651 chromium Substances 0.000 claims description 3
- 229910052593 corundum Inorganic materials 0.000 claims description 3
- 239000010431 corundum Substances 0.000 claims description 3
- 238000004321 preservation Methods 0.000 claims description 3
- 239000003381 stabilizer Substances 0.000 claims description 3
- 239000000126 substance Substances 0.000 abstract description 5
- 238000000354 decomposition reaction Methods 0.000 abstract description 2
- 238000006722 reduction reaction Methods 0.000 description 34
- 238000005516 engineering process Methods 0.000 description 9
- 238000013461 design Methods 0.000 description 7
- 230000014759 maintenance of location Effects 0.000 description 7
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 6
- 238000000034 method Methods 0.000 description 5
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 4
- 230000033228 biological regulation Effects 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- LELOWRISYMNNSU-UHFFFAOYSA-N hydrogen cyanide Chemical compound N#C LELOWRISYMNNSU-UHFFFAOYSA-N 0.000 description 4
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 4
- 230000001590 oxidative effect Effects 0.000 description 4
- 239000002699 waste material Substances 0.000 description 4
- WEVYAHXRMPXWCK-UHFFFAOYSA-N Acetonitrile Chemical compound CC#N WEVYAHXRMPXWCK-UHFFFAOYSA-N 0.000 description 3
- 229910021529 ammonia Inorganic materials 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
- VHUUQVKOLVNVRT-UHFFFAOYSA-N Ammonium hydroxide Chemical compound [NH4+].[OH-] VHUUQVKOLVNVRT-UHFFFAOYSA-N 0.000 description 2
- 206010021143 Hypoxia Diseases 0.000 description 2
- 235000011114 ammonium hydroxide Nutrition 0.000 description 2
- 238000009841 combustion method Methods 0.000 description 2
- 239000002283 diesel fuel Substances 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 239000000446 fuel Substances 0.000 description 2
- 239000003345 natural gas Substances 0.000 description 2
- 229910052757 nitrogen Inorganic materials 0.000 description 2
- 238000005507 spraying Methods 0.000 description 2
- 238000000889 atomisation Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000009530 blood pressure measurement Methods 0.000 description 1
- 238000006555 catalytic reaction Methods 0.000 description 1
- 238000010531 catalytic reduction reaction Methods 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000002894 chemical waste Substances 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 150000002825 nitriles Chemical class 0.000 description 1
- 150000002978 peroxides Chemical class 0.000 description 1
- 239000010908 plant waste Substances 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- FVSKHRXBFJPNKK-UHFFFAOYSA-N propionitrile Chemical compound CCC#N FVSKHRXBFJPNKK-UHFFFAOYSA-N 0.000 description 1
- 238000010405 reoxidation reaction Methods 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- 239000002912 waste gas Substances 0.000 description 1
- 238000004056 waste incineration Methods 0.000 description 1
- 238000004065 wastewater treatment Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G7/00—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals
- F23G7/008—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals for liquid waste
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G5/00—Incineration of waste; Incinerator constructions; Details, accessories or control therefor
- F23G5/08—Incineration of waste; Incinerator constructions; Details, accessories or control therefor having supplementary heating
- F23G5/12—Incineration of waste; Incinerator constructions; Details, accessories or control therefor having supplementary heating using gaseous or liquid fuel
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G2204/00—Supplementary heating arrangements
- F23G2204/10—Supplementary heating arrangements using auxiliary fuel
- F23G2204/103—Supplementary heating arrangements using auxiliary fuel gaseous or liquid fuel
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G2209/00—Specific waste
- F23G2209/10—Liquid waste
Landscapes
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Incineration Of Waste (AREA)
- Chimneys And Flues (AREA)
Abstract
The invention discloses a combustion device for treating acrylonitrile wastewater, which comprises a combustor and an incinerator; the burner consists of a shell, a central oil-gas combined spray gun, a peripheral oil-gas combined spray gun, an ignition gun, a flame detector, a sight glass and a connecting flange; the incinerator comprises a reduction incineration area, an oxidation incineration area, a denitration temperature adjusting area and an SNCR denitration area; the outlet of the incinerator is provided with a secondary temperature adjusting area, the original incineration area and the oxidation incineration area are arranged on the vertical section of the incinerator, and the denitration temperature adjusting area, the SNCR denitration area and the secondary temperature adjusting area are arranged on the horizontal section of the incinerator. The utility model provides a handle burner of acrylonitrile waste water, can high-efficiently handle acrylonitrile waste water, ensure that harmful substance's decomposition is complete and the secondary pollution of NOx reduces as far as possible.
Description
Technical Field
The invention belongs to the technical field of chemical waste incineration, and particularly relates to a combustion device for treating acrylonitrile wastewater.
Background
The waste liquid incineration system is an important safety and environmental protection facility for petrochemical enterprises, is used for treating waste gas and waste liquid discharged by each process device and auxiliary facilities, can carry out innocent incineration treatment timely, safely and reliably, and meets related environmental protection requirements. The waste liquid treatment technology has the advantages of international advanced level, high heat efficiency, low energy consumption and low pollutant discharge.
The burning method has the greatest advantage that the waste water can be reduced rapidly and to a great extent, and is a very effective waste water treatment method. The waste water incineration process is a comprehensive process integrating multiple disciplines of physical change, chemical change, reaction kinetics, catalysis, combustion aerodynamics, heat transfer science and the like.
The amount of waste water that the acrylonitrile trade produced is big, contains fuel N, consequently needs provide a burner to carry out incineration disposal to the acrylonitrile waste water to through rationally designing combustion system, with NOx content control in the flue gas at minimum level, satisfy the emission requirement, realize the long period steady operation of system, guarantee system operation reliability.
Disclosure of Invention
In order to solve the problems, the embodiment of the invention provides a combustion device for treating acrylonitrile wastewater, which can effectively reduce the emission of NOx.
The technical solution of the invention is as follows: a combustion device for treating acrylonitrile wastewater comprises a combustor and an incinerator;
the combustor comprises a shell, a central oil-gas combined spray gun, a peripheral oil-gas combined spray gun, an ignition gun, a flame detector, a sight glass and a connecting flange;
the incinerator comprises a reduction incineration area, an oxidation incineration area, a denitration temperature adjusting area and an SNCR denitration area; the incinerator is characterized in that a secondary temperature adjusting area is arranged at the outlet of the incinerator, the original incineration area and the oxidation incineration area are arranged on the vertical section of the incinerator, and the denitration temperature adjusting area, the SNCR denitration area and the secondary temperature adjusting area are arranged on the horizontal section of the incinerator.
The inner wall of the shell is provided with a ceramic fiber felt for heat preservation and heat insulation;
a partition plate is arranged at the lower part of the shell, and a space is formed between the partition plate and the outlet of the combustor and used for constructing refractory castable;
the center of the shell is provided with a combustion throat, 6 combustion throats are uniformly arranged on the periphery of the shell, and each combustion throat forms tangential rotational flow arrangement.
An oil gun and a gas gun are arranged at the center of the central oil-gas combined spray gun, the oil gun and the gas gun form a jacket, the center of the jacket is fuel oil, and fuel gas is arranged outside the jacket;
the gas gun is characterized in that a flame holder is arranged at the outlet of the gas gun and consists of a preset number of rotational flow flame holding blades.
The ignition gun is in a fuel gas or compressed air semi-premixing type, the ignition gun is arranged on the outer side of the central oil-gas combined type spray gun, and the ignition end of the ignition gun is arranged beside the flame stabilizer and used for igniting main flame.
The number of the flame detectors is 3, 1 flame detector is arranged on the side surface of the combustor shell, and the end part of the flame detector is aligned to the tail end of the ignition gun and used for monitoring the flame of the ignition gun;
2 are arranged on the top of the burner and are used for monitoring the burning large flame.
The number of the sight glasses is 7, the sight glasses are distributed on the center and the peripheral oil-gas combined type spray gun end plates and are used for observing the working state of each spray gun;
the connecting flange is used for connecting the combustor and the incinerator.
The reduction incineration area consists of a reduction incineration first area and a reduction incineration second area;
acrylonitrile wastewater spray guns are uniformly arranged on the shoulder part of the starting end of the first reduction incineration area and the shoulder part of the starting end of the second reduction incineration area;
the reduction incineration first area and the reduction incineration second area are respectively provided with an air inlet for providing oxygen required by waste water incineration;
the gun heads of the acrylonitrile wastewater spray guns are all positioned in an air outlet pipeline;
the inner side of the furnace shell of the reduction incineration area is provided with a lining structure, the chromium corundum bricks are arranged facing the fire surface, and the heat insulation layer is provided with a ceramic fiberboard;
and a laser CO analyzer and a thermocouple measuring point are arranged at an outlet of the reduction incineration area and are used for monitoring the CO content and the temperature of the reduction area.
The initial part of the oxidation incineration area is provided with an air inlet which is used for providing air required by oxidation incineration;
the inlet of the oxidation incineration area is provided with a reducing device for increasing the flow velocity of the flue gas and intensifying the disturbance of the flue gas and the oxidation air, and each air pipe of the oxidation air forms a first preset angle with the flow direction of the flue gas;
the inner side of the furnace shell of the oxidation incineration area is provided with a lining structure, a fire surface is provided with mullite bricks, and a heat insulation layer is provided with a ceramic fiberboard;
the outlet of the oxidation incineration area is provided with a laser O2Analyzer, thermocouple measuring point and pressure measuring point, the laser O2The analyzer being for monitoring O2And the thermocouple measuring point is used for monitoring the temperature of the oxidation zone, and the pressure measuring point is used for monitoring the pressure of the hearth.
An air inlet is formed at the initial position of the denitration temperature adjusting area;
the direction of the front exhaust outlet is vertical to the flow direction of the flue gas; the rear exhaust air outlet is arranged on the shoulder part of the temperature adjusting area, and the air outlet direction and the smoke flowing direction are arranged at an angle;
and a thermocouple measuring point is arranged at the outlet of the denitration temperature adjusting area.
An SNCR spray gun is arranged at an inlet of the SNCR denitration area;
lining structures are arranged on the inner sides of the furnace shells of the denitration temperature adjusting region and the SNCR denitration region, mullite bricks are arranged on the fire surface, and ceramic fiber plates are arranged on the heat insulation layer;
and the secondary temperature adjusting area is provided with an air inlet, and the direction of the secondary temperature adjusting air outlet and the flowing direction of the flue gas form tangential rotational flow.
Compared with the prior art, the invention has the beneficial effects that: the invention relates to a combustion device for treating acrylonitrile wastewater, which comprises a combustor and an incinerator, wherein the combustor provides a high-temperature heat source for treating the acrylonitrile wastewater, and the incinerator provides sufficient incineration space and incineration time for the acrylonitrile wastewater. The combustion device for treating the acrylonitrile wastewater adopts an advanced multi-section combustion process technology and a mature, advanced and reasonable incineration technology, can efficiently treat the acrylonitrile wastewater, ensures that harmful substances are completely decomposed, reduces secondary pollution of NOx as much as possible, reduces the operation cost of a system and the overall investment, and achieves the effects of saving energy and cost and reducing pollution to the maximum extent.
Drawings
FIG. 1 is a schematic structural diagram of a combustor provided in an embodiment of the present invention;
FIG. 2 is a schematic structural diagram of an incinerator according to an embodiment of the present invention;
FIG. 3 is a layout view of an SNCR spray gun according to an embodiment of the invention;
fig. 4 is a layout diagram of a secondary temperature adjusting air duct provided by the embodiment of the invention.
Detailed Description
The present invention will be described in detail below with reference to specific embodiments and with reference to the attached drawings. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
The combustion device for treating acrylonitrile wastewater mainly comprises a combustor and an incinerator. The combustor is used for providing a high-temperature heat source for the treatment of acrylonitrile wastewater, and adopts the technical scheme of a high-power combined combustor in the type of oil burning, gas burning or oil-gas mixed burning; the incinerator can adopt an L-shaped furnace body and is top-fired, the incinerator is used for providing sufficient incineration space and incineration time for acrylonitrile wastewater, and the adopted technical scheme is that multi-stage air distribution, multi-stage wastewater arrangement, an in-furnace reduction-reoxidation technology and an in-furnace ammonia spraying denitration technology can effectively reduce the emission of NOx.
The combustion apparatus for treating acrylonitrile waste water and the operation principle thereof according to the embodiment of the present invention will be described with reference to fig. 1 to 4.
The combustion apparatus for treating acrylonitrile wastewater according to the embodiment of the present application comprises a burner and an incinerator, and the specific structure of the burner is described below with reference to fig. 1, and the specific structure of the incinerator is described below with reference to fig. 2.
1. Burner with a burner head
The burner for treating acrylonitrile wastewater mainly comprises a shell 101, a central oil-gas combined type spray gun 102, a peripheral oil-gas combined type spray gun 103, an ignition gun 104, a flame detector 105, a sight glass 106 and a connecting flange 107. The combustor can provide 0-25 MW power, and can use natural gas or diesel oil alone or the combination of the natural gas and the diesel oil as fuel.
The inner wall of the shell 101 is provided with a ceramic fiber felt 108 for heat preservation and insulation. A partition plate 109 made of 310S is arranged at the lower part of the shell 101, and a space is reserved between the partition plate and the outlet of the combustor for constructing refractory castable 110. 1 central combustion throat 111 is arranged at the center of the shell, 6 peripheral combustion throats 112 are uniformly arranged at the periphery of the shell, and the central combustion throat 111 and the peripheral combustion throats 112 form tangential rotational flow arrangement.
The central oil-gas combined type spray gun 102 is provided with a central oil gun 113 and a gas gun 114 at the central position, the central oil gun 113 and the gas gun 114 form a jacket, the center of the jacket is fuel oil, and fuel gas is arranged outside the jacket. The gas gun 114 outlet sets up flame holder 115 for stable flame, and flame holder 115 comprises 8 ~ 12 whirl flame holding blades.
The central position of the peripheral oil-gas combined spray gun 103 is provided with a peripheral oil gun 116 and four ring type gas spray guns 117, the center is fuel oil, and fuel gas is at the outermost side.
The ignition gun 104 is a fuel gas/compressed air semi-premixing type and is arranged outside the central oil-gas combined type spray gun 102, and the ignition end of the ignition gun 104 is arranged at the side of the flame stabilizer 115, so that main flame can be smoothly ignited.
3 flame detectors 105, 1 arranged on the side of the burner housing 101, the end of each flame detector being aligned with the end of the ignition gun for monitoring the flame of the ignition gun 104; 2 are arranged on top of the burner housing 101 for monitoring the burning large flame.
The viewing mirrors 106 are 7 in number, are arranged on the end plates of the central oil-gas combined type spray gun 102 and the peripheral oil-gas combined type spray guns 103, and can respectively observe the working state of each spray gun.
The connection flange 107 is used for connection of the burner to the incinerator.
2. Incinerator
As shown in FIG. 2, the working area of the incinerator for treating acrylonitrile wastewater mainly comprises a reduction incineration area 201, an oxidation incineration area 202, a denitration temperature-adjusting area 203 and an SNCR denitration area 204, and the outlet of the incinerator is also provided with a secondary temperature-adjusting area 205. The reduction incineration zone 201 and the oxidation incineration zone 202 are arranged on the vertical section of the incinerator, and the denitration temperature-adjusting zone 203, the SNCR denitration zone 204 and the secondary temperature-adjusting zone 205 are arranged on the horizontal section of the incinerator. And (4) designing the micro negative pressure in the incinerator.
The reduction incineration zone 201 is composed of a reduction incineration 1 zone 206 and a reduction incineration 2 zone 207. Acrylonitrile waste water spray guns 208 are uniformly arranged on the shoulder of the starting end of the reduction incineration 1 area 206 and the shoulder of the starting end of the reduction incineration 2 area 207. Air inlets are respectively arranged on the reduction incineration 1 area 206 and the reduction incineration 2 area 207 and are used for providing oxygen required by waste water incineration. The tips of the acrylonitrile wastewater spray guns 208 are all positioned in the air outlet pipeline, so that the wastewater can be ensured to fully react with oxygen, and the spray heads can be protected by air flow cooling.
The acrylonitrile waste water spray gun 208 can be used according to different working conditions, and the incinerator has larger waste water adjusting capacity. The inner side of the furnace shell of the reduction incineration area 201 is provided with a lining structure, a fire surface is provided with a chromium corundum brick 209, and a heat insulation layer is provided with a ceramic fiber plate. And a laser CO analyzer 211 and a thermocouple 212 are arranged at the outlet of the reduction incineration area 201 and used for monitoring the CO content and the temperature of the reduction incineration area 201.
The oxidation incineration area 202 is provided with an air inlet at the beginning, and the air inlet is formed by a plurality of oxidation air pipes 213 and is used for providing air required by oxidation incineration. The inlet of the oxidation incineration area 202 is provided with a reducing hole, so that the flow velocity of the flue gas is increased, and the disturbance of the flue gas and the oxidizing air is intensified, thereby achieving the purpose of full oxidation. Each air pipe of the oxidation air is arranged at a certain angle with the flowing direction of the flue gas.
The inner side of the furnace shell of the oxidation incineration area 202 is provided with a liningStructurally, mullite bricks 210 are arranged on the fire surface, and ceramic fiber plates are arranged on the heat insulation layer. The outlet of the oxidation incineration area 202 is provided with laser O2An analyzer 214, thermocouple measurement points 212, and pressure measurement points 215 for monitoring O2Content, oxidation burn-up zone 202 temperature, and oxidation burn-up zone 202 pressure. The initial position of the denitration temperature-adjusting region 203 is provided with an air inlet which is composed of a plurality of temperature-adjusting air pipes 216 and is used for adjusting temperature. The direction of the exhaust outlet before the temperature adjusting wind is vertical to the flow direction of the flue gas; the rear row is arranged on the shoulder of the denitration temperature-adjusting area 203, and the wind outlet direction and the smoke flowing direction are arranged at an angle.
And a thermocouple measuring point 212 at the outlet of the denitration temperature-adjusting region 203 is used for monitoring the temperature-adjusting effect. The denitration temperature-adjusting zone 203 and the SNCR denitration zone 204 are provided with lining structures on the inner sides of the furnace shells, mullite bricks 210 are arranged on the fire surface, and ceramic fiber plates are arranged on the heat insulation layers. The secondary temperature control area 205 is provided with an air inlet for secondary temperature control.
With reference to fig. 2 and 3, an SNCR spray gun 217 is provided at the inlet of the SNCR denitration zone 204. The upper 2 SNCR guns 217 of row 1 are arranged at 120 ° and the lower 2 SNCR guns 217 are arranged at 70 °. The 2 upper SNCR guns 217 of row 2 are arranged at 90 °, the 2 middle SNCR guns 217 are arranged at 150 °, and the 2 lower SNCR guns 217 are arranged at 60 °.
With reference to fig. 2 and fig. 4, the secondary temperature-adjusting air has 2 exhaust nozzles, 12 DN125 air pipe 218 outlets are uniformly distributed in the front row, the air outlet direction and the flue gas flowing direction are arranged in a tangential rotational flow mode, and the tangential diameter is 2000 mm; 12 DN125 air pipe 218 outlets are uniformly distributed on the rear row, the direction of the air outlets and the flowing direction of the flue gas are arranged in a tangential rotational flow mode, and the diameter of a tangent circle is 1000 mm.
The combustor is connected with the incinerator through a connecting flange to form a device for treating acrylonitrile wastewater. The above description of the specific structure of the apparatus, the flow and principle of the low NOx combustion method performed by the apparatus are described below.
3. Description of Low NOx Combustion method:
1) reasonable grading air distribution
As shown in the attached figure 2, 6-grade air distribution is designed in the combustion device for treating the acrylonitrile wastewater, wherein 4 paths of combustion-supporting air are respectively used for distributing air to the combustor, the area 206 for reduction incineration 1, the area 207 for reduction incineration and the area 202 for oxidation incineration; the adjusting air is 2 paths, and is respectively distributed to the denitration temperature adjusting area 203 and the secondary temperature adjusting area 204.
The air distribution of the burner, the air distribution of the reduction incineration 1 area and the air distribution of the incineration 2 area are designed to have an oxygen deficiency coefficient of 0.8, and the adjustable range of the oxygen deficiency coefficient is 0.6-1.
The air distribution design of the oxidation incineration area has the peroxide coefficient of 1.4 and the adjustable range of the oxygen coefficient of 0.8-1.6. The air distribution design air volume of the denitration temperature regulation area can meet the design temperature regulation target of 950 ℃. The air distribution design air quantity of the secondary temperature regulation area can meet the design temperature regulation target of 650 ℃.
2) Reasonable smoke retention time
The retention time of the flue gas in the reduction incineration area 201 is 0.8-1.2 s; the retention time of the flue gas in the oxidation incineration area 202 is 0.85-1.35 s; the flue gas retention time of the denitration temperature-adjusting zone 203 is 0.7-1 s; the residence time of the flue gas in the SNCR denitration zone 204 is 0.7-1 s.
The total effective volume of the hearth of the incinerator for treating the acrylonitrile wastewater can meet the requirement that the total retention time of high-temperature flue gas in the incinerator is more than 2s, and can fully meet the requirement of the incineration retention time and retention space of the acrylonitrile wastewater.
3) Reduction-oxidation combustion technology
Below the burners is introduced the reduction incineration zone 201 of the incineration plant. The acrylonitrile plant waste water is combined before entering the plant and then introduced into the high temperature zone of the reduction incineration zone 201 through the high and low level acrylonitrile waste water injection lance 208, the amount of combustion oxygen injected with the waste water being maintained at a sub-stoichiometric air/waste water ratio. In an oxygen-deficient environment, compounds such as acrylonitrile (C)3H3N), acetonitrile (C)2H3N), hydrocyanic acid (HCN) and propionitrile (C)3H5N) by reduction of nitrogen to N2Rather than forming NOx, the operating temperature drop of the reduction stage is adjusted by controlling the stoichiometric ratio. By such a design, chemical nitrogen in the waste stream is greatly suppressed from generating NOx.
The operating temperature of the reduction incineration zone 201 is between 900 ℃ and 1150 ℃.
Excess oxidizing air is introduced at the inlet of the oxidizing incineration zone 202 to complete the complete oxidation. The oxidizing air is sprayed into the flue gas from the reduction incineration zone 201 through the annular spray holes, so that sufficient mixing can be achieved.
The operating temperature in the oxidation incineration zone 202 is 1050 ℃ to 1100 ℃.
In order to further oxidize the combustible material remaining in the outlet flue gas from the reduction incineration zone 201, the oxidation incineration zone 202 must be controlled at a higher operating temperature. But this operating temperature must not be too high, otherwise thermal NOx is formed, which mainly depends on high temperatures and secondly requires sufficient oxygen. Therefore, the temperature and excess oxygen must be controlled to both achieve sufficient combustion to achieve high destruction rates, while preventing the formation of thermal NOx.
4) Good in-furnace denitration level
The SNCR denitration zone 204 is used to further remove NOx from the flue gas. The combustion products in the oxidation burning area 202 enter a NOx selective non-catalytic reduction System (SNCR), after the temperature of the combustion products is adjusted by temperature adjusting air in a denitration temperature adjusting area 203, ammonia water is atomized by compressed air and then sprayed into a hearth by using an SNCR spray gun 217, and the design of a spray nozzle ensures that NOx and ammonia are finely mixed, and the ammonia reacts with NOx to be reduced to generate N2. With this technique, about 40% to 50% of the NOx is reduced.
The SNCR denitration area 204 is provided with 10 SNCR spray guns 217 in total, and the arrangement is carried out by adopting a mode of front 4 and back 6. The SNCR spray gun 217 adopts a fan-shaped atomized ammonia water spraying technology, and has a good atomization effect.
The utility model provides a handle burner of acrylonitrile waste water, various nitrile waste water that can effective treatment acrylonitrile device produced adopts advanced multistage burning technology, adopts ripe, advanced, reasonable burning technology, can high-efficiently handle acrylonitrile waste water, ensures that the complete and secondary pollution who reduces NOx of decomposition of harmful substance, reduces the running cost of system and reduces whole investment, reaches the biggest energy-conservation, economizes on expenses, reduces the effect that pollutes.
The above description is only for the best mode of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention.
Those skilled in the art will appreciate that the details of the invention not described in detail in this specification are well within the skill of those in the art.
Claims (10)
1. A combustion apparatus for treating acrylonitrile waste water, the apparatus comprising: a burner and an incinerator;
the combustor comprises a shell, a central oil-gas combined spray gun, a peripheral oil-gas combined spray gun, an ignition gun, a flame detector, a sight glass and a connecting flange;
the incinerator comprises a reduction incineration area, an oxidation incineration area, a denitration temperature adjusting area and an SNCR denitration area; the incinerator is characterized in that a secondary temperature adjusting area is arranged at the outlet of the incinerator, the original incineration area and the oxidation incineration area are arranged on the vertical section of the incinerator, and the denitration temperature adjusting area, the SNCR denitration area and the secondary temperature adjusting area are arranged on the horizontal section of the incinerator.
2. The combustion apparatus for treating acrylonitrile waste water according to claim 1, wherein:
the inner wall of the shell is provided with a ceramic fiber felt for heat preservation and heat insulation;
a partition plate is arranged at the lower part of the shell, and a space is formed between the partition plate and the outlet of the combustor and used for constructing refractory castable;
the center of the shell is provided with a combustion throat, 6 combustion throats are uniformly arranged on the periphery of the shell, and each combustion throat forms tangential rotational flow arrangement.
3. The combustion apparatus for treating acrylonitrile waste water according to claim 1, wherein:
an oil gun and a gas gun are arranged at the center of the central oil-gas combined spray gun, the oil gun and the gas gun form a jacket, the center of the jacket is fuel oil, and fuel gas is arranged outside the jacket;
the gas gun is characterized in that a flame holder is arranged at the outlet of the gas gun and consists of a preset number of rotational flow flame holding blades.
4. The combustion apparatus for treating acrylonitrile waste water according to claim 3, characterized in that:
the ignition gun is in a fuel gas or compressed air semi-premixing type, the ignition gun is arranged on the outer side of the central oil-gas combined type spray gun, and the ignition end of the ignition gun is arranged beside the flame stabilizer and used for igniting main flame.
5. The combustion apparatus for treating acrylonitrile waste water according to claim 4,
the number of the flame detectors is 3, 1 flame detector is arranged on the side surface of the combustor shell, and the end part of the flame detector is aligned to the tail end of the ignition gun and used for monitoring the flame of the ignition gun;
2 are arranged on the top of the burner and are used for monitoring the burning large flame.
6. The combustion apparatus for treating acrylonitrile waste water according to claim 1, wherein:
the number of the sight glasses is 7, the sight glasses are distributed on the center and the peripheral oil-gas combined type spray gun end plates and are used for observing the working state of each spray gun;
the connecting flange is used for connecting the combustor and the incinerator.
7. The combustion apparatus for treating acrylonitrile waste water according to claim 1, wherein the reduction incineration zone is composed of a reduction incineration one zone and a reduction incineration two zone;
acrylonitrile wastewater spray guns are uniformly arranged on the shoulder part of the starting end of the first reduction incineration area and the shoulder part of the starting end of the second reduction incineration area;
the reduction incineration first area and the reduction incineration second area are respectively provided with an air inlet for providing oxygen required by waste water incineration;
the gun heads of the acrylonitrile wastewater spray guns are all positioned in an air outlet pipeline;
the inner side of the furnace shell of the reduction incineration area is provided with a lining structure, the chromium corundum bricks are arranged facing the fire surface, and the heat insulation layer is provided with a ceramic fiberboard;
and a laser CO analyzer and a thermocouple measuring point are arranged at an outlet of the reduction incineration area and are used for monitoring the CO content and the temperature of the reduction area.
8. The combustion apparatus for treating acrylonitrile waste water according to claim 7,
the initial part of the oxidation incineration area is provided with an air inlet which is used for providing air required by oxidation incineration;
the inlet of the oxidation incineration area is provided with a reducing device for increasing the flow velocity of the flue gas and intensifying the disturbance of the flue gas and the oxidation air, and each air pipe of the oxidation air forms a first preset angle with the flow direction of the flue gas;
the inner side of the furnace shell of the oxidation incineration area is provided with a lining structure, a fire surface is provided with mullite bricks, and a heat insulation layer is provided with a ceramic fiberboard;
the outlet of the oxidation incineration area is provided with a laser O2Analyzer, thermocouple measuring point and pressure measuring point, the laser O2The analyzer being for monitoring O2And the thermocouple measuring point is used for monitoring the temperature of the oxidation zone, and the pressure measuring point is used for monitoring the pressure of the hearth.
9. The combustion apparatus for treating acrylonitrile waste water according to claim 8, characterized in that:
an air inlet is formed at the initial position of the denitration temperature adjusting area;
the direction of the front exhaust outlet is vertical to the flow direction of the flue gas; the rear exhaust air outlet is arranged on the shoulder part of the temperature adjusting area, and the air outlet direction and the smoke flowing direction are arranged at an angle;
and a thermocouple measuring point is arranged at the outlet of the denitration temperature adjusting area.
10. The combustion apparatus for treating acrylonitrile waste water according to claim 8, characterized in that:
an SNCR spray gun is arranged at an inlet of the SNCR denitration area;
lining structures are arranged on the inner sides of the furnace shells of the denitration temperature adjusting region and the SNCR denitration region, mullite bricks are arranged on the fire surface, and ceramic fiber plates are arranged on the heat insulation layer;
and the secondary temperature adjusting area is provided with an air inlet, and the direction of the secondary temperature adjusting air outlet and the flowing direction of the flue gas form tangential rotational flow.
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| CN202111314593.5A CN114110618B (en) | 2021-11-08 | 2021-11-08 | Combustion device for treating acrylonitrile wastewater |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116557877A (en) * | 2023-07-09 | 2023-08-08 | 浙江百能科技有限公司 | Oxygen-enriched incineration and heat recovery system for PTA waste residue liquid |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2388495Y (en) * | 1999-08-13 | 2000-07-19 | 张自美 | Oil-gas combustion gun |
| CN202835390U (en) * | 2012-08-15 | 2013-03-27 | 中国船舶重工集团公司第七一一研究所 | Waste incinerator with heat recovery steam generator |
| JP2013200117A (en) * | 2013-05-22 | 2013-10-03 | Tsukishima Kankyo Engineering Ltd | Incineration disposal device and incineration disposal method of chromium-containing waste liquid |
| CN205137462U (en) * | 2015-09-30 | 2016-04-06 | 西安航天源动力工程有限公司 | A many fuel combustor for wind channel heating |
| CN105937766A (en) * | 2016-06-08 | 2016-09-14 | 北京航天动力研究所 | Low nitrogen oxide incinerating device used for treatment of nitrogen containing waste gas and nitrogen containing waste liquid and low nitrogen oxide incinerating method used for treatment of nitrogen containing waste gas and nitrogen containing waste liquid |
| CN206055643U (en) * | 2016-08-31 | 2017-03-29 | 江苏天皓环保集团有限公司 | A kind of organic waste liquid burning device |
| CN107631308A (en) * | 2017-10-30 | 2018-01-26 | 北京航化节能环保技术有限公司 | A kind of system and method for high temperature incineration method processing acrylic nitrile waste water |
| CN109724093A (en) * | 2017-10-30 | 2019-05-07 | 北京航化节能环保技术有限公司 | A kind of burner and combustion method handling High water cut low heat value organic wastewater |
| CN111720840A (en) * | 2020-06-12 | 2020-09-29 | 山东同智创新能源科技股份有限公司 | Be applied to waste gas liquid incineration's low-nitrogen combustion device |
| CN112728558A (en) * | 2021-01-19 | 2021-04-30 | 西安交通大学 | Sludge harmless low-nitrogen combustion system and method integrating biogas combustion |
-
2021
- 2021-11-08 CN CN202111314593.5A patent/CN114110618B/en active Active
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2388495Y (en) * | 1999-08-13 | 2000-07-19 | 张自美 | Oil-gas combustion gun |
| CN202835390U (en) * | 2012-08-15 | 2013-03-27 | 中国船舶重工集团公司第七一一研究所 | Waste incinerator with heat recovery steam generator |
| JP2013200117A (en) * | 2013-05-22 | 2013-10-03 | Tsukishima Kankyo Engineering Ltd | Incineration disposal device and incineration disposal method of chromium-containing waste liquid |
| CN205137462U (en) * | 2015-09-30 | 2016-04-06 | 西安航天源动力工程有限公司 | A many fuel combustor for wind channel heating |
| CN105937766A (en) * | 2016-06-08 | 2016-09-14 | 北京航天动力研究所 | Low nitrogen oxide incinerating device used for treatment of nitrogen containing waste gas and nitrogen containing waste liquid and low nitrogen oxide incinerating method used for treatment of nitrogen containing waste gas and nitrogen containing waste liquid |
| CN206055643U (en) * | 2016-08-31 | 2017-03-29 | 江苏天皓环保集团有限公司 | A kind of organic waste liquid burning device |
| CN107631308A (en) * | 2017-10-30 | 2018-01-26 | 北京航化节能环保技术有限公司 | A kind of system and method for high temperature incineration method processing acrylic nitrile waste water |
| CN109724093A (en) * | 2017-10-30 | 2019-05-07 | 北京航化节能环保技术有限公司 | A kind of burner and combustion method handling High water cut low heat value organic wastewater |
| CN111720840A (en) * | 2020-06-12 | 2020-09-29 | 山东同智创新能源科技股份有限公司 | Be applied to waste gas liquid incineration's low-nitrogen combustion device |
| CN112728558A (en) * | 2021-01-19 | 2021-04-30 | 西安交通大学 | Sludge harmless low-nitrogen combustion system and method integrating biogas combustion |
Non-Patent Citations (1)
| Title |
|---|
| 阚红元;: "赛科丙烯腈废水焚烧炉简介", 化工设备与管道, no. 05, pages 24 - 27 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116557877A (en) * | 2023-07-09 | 2023-08-08 | 浙江百能科技有限公司 | Oxygen-enriched incineration and heat recovery system for PTA waste residue liquid |
| CN116557877B (en) * | 2023-07-09 | 2023-10-24 | 浙江百能科技有限公司 | Oxygen-enriched incineration and heat recovery system for PTA waste residue liquid |
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| CN114110618B (en) | 2024-04-09 |
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