CN116734265A - In-furnace control method for acidic pollutants in household garbage co-combustion industrial organic solid waste process - Google Patents
In-furnace control method for acidic pollutants in household garbage co-combustion industrial organic solid waste process Download PDFInfo
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- CN116734265A CN116734265A CN202310874045.0A CN202310874045A CN116734265A CN 116734265 A CN116734265 A CN 116734265A CN 202310874045 A CN202310874045 A CN 202310874045A CN 116734265 A CN116734265 A CN 116734265A
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- treating agent
- organic solid
- household garbage
- industrial organic
- solid waste
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- 238000000034 method Methods 0.000 title claims abstract description 51
- 239000010813 municipal solid waste Substances 0.000 title claims abstract description 34
- 239000003344 environmental pollutant Substances 0.000 title claims abstract description 24
- 231100000719 pollutant Toxicity 0.000 title claims abstract description 24
- 239000002910 solid waste Substances 0.000 title claims abstract description 21
- 230000002378 acidificating effect Effects 0.000 title claims abstract description 10
- 238000002485 combustion reaction Methods 0.000 title claims abstract description 9
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 38
- 238000005507 spraying Methods 0.000 claims abstract description 24
- 239000002253 acid Substances 0.000 claims abstract description 23
- 239000000843 powder Substances 0.000 claims abstract description 21
- 238000002156 mixing Methods 0.000 claims abstract description 13
- 239000000203 mixture Substances 0.000 claims abstract description 12
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical group [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 claims abstract description 6
- AMWRITDGCCNYAT-UHFFFAOYSA-L hydroxy(oxo)manganese;manganese Chemical compound [Mn].O[Mn]=O.O[Mn]=O AMWRITDGCCNYAT-UHFFFAOYSA-L 0.000 claims description 14
- 150000002697 manganese compounds Chemical class 0.000 claims description 14
- 239000000292 calcium oxide Substances 0.000 claims description 10
- ODINCKMPIJJUCX-UHFFFAOYSA-N calcium oxide Inorganic materials [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 claims description 10
- BRPQOXSCLDDYGP-UHFFFAOYSA-N calcium oxide Chemical compound [O-2].[Ca+2] BRPQOXSCLDDYGP-UHFFFAOYSA-N 0.000 claims description 9
- 229940099596 manganese sulfate Drugs 0.000 claims description 7
- 235000007079 manganese sulphate Nutrition 0.000 claims description 7
- 239000011702 manganese sulphate Substances 0.000 claims description 7
- SQQMAOCOWKFBNP-UHFFFAOYSA-L manganese(II) sulfate Chemical compound [Mn+2].[O-]S([O-])(=O)=O SQQMAOCOWKFBNP-UHFFFAOYSA-L 0.000 claims description 7
- 150000003863 ammonium salts Chemical class 0.000 claims description 6
- PQUCIEFHOVEZAU-UHFFFAOYSA-N Diammonium sulfite Chemical compound [NH4+].[NH4+].[O-]S([O-])=O PQUCIEFHOVEZAU-UHFFFAOYSA-N 0.000 claims description 4
- BFNBIHQBYMNNAN-UHFFFAOYSA-N ammonium sulfate Chemical compound N.N.OS(O)(=O)=O BFNBIHQBYMNNAN-UHFFFAOYSA-N 0.000 claims description 4
- 229910052921 ammonium sulfate Inorganic materials 0.000 claims description 4
- 235000011130 ammonium sulphate Nutrition 0.000 claims description 4
- 150000002696 manganese Chemical class 0.000 claims description 2
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 abstract description 27
- 239000003546 flue gas Substances 0.000 abstract description 27
- MWUXSHHQAYIFBG-UHFFFAOYSA-N Nitric oxide Chemical compound O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 abstract description 9
- RAHZWNYVWXNFOC-UHFFFAOYSA-N Sulphur dioxide Chemical compound O=S=O RAHZWNYVWXNFOC-UHFFFAOYSA-N 0.000 abstract description 6
- 239000000126 substance Substances 0.000 abstract description 6
- 239000002699 waste material Substances 0.000 abstract description 5
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 abstract description 3
- 238000004056 waste incineration Methods 0.000 abstract description 2
- 239000007789 gas Substances 0.000 description 9
- 239000000428 dust Substances 0.000 description 7
- 235000008733 Citrus aurantifolia Nutrition 0.000 description 6
- 235000011941 Tilia x europaea Nutrition 0.000 description 6
- 239000004571 lime Substances 0.000 description 6
- 238000006386 neutralization reaction Methods 0.000 description 4
- 239000007921 spray Substances 0.000 description 4
- 239000002245 particle Substances 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- HGUFODBRKLSHSI-UHFFFAOYSA-N 2,3,7,8-tetrachloro-dibenzo-p-dioxin Chemical compound O1C2=CC(Cl)=C(Cl)C=C2OC2=C1C=C(Cl)C(Cl)=C2 HGUFODBRKLSHSI-UHFFFAOYSA-N 0.000 description 2
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 229910001385 heavy metal Inorganic materials 0.000 description 2
- 239000011572 manganese Substances 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 229910004261 CaF 2 Inorganic materials 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 238000003915 air pollution Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 229910002091 carbon monoxide Inorganic materials 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000006477 desulfuration reaction Methods 0.000 description 1
- 230000023556 desulfurization Effects 0.000 description 1
- 230000003009 desulfurizing effect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 229910052748 manganese Inorganic materials 0.000 description 1
- 229910052753 mercury Inorganic materials 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 239000000779 smoke Substances 0.000 description 1
- 239000004071 soot Substances 0.000 description 1
Classifications
-
- 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
- F23G5/44—Details; Accessories
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES
- F23J15/00—Arrangements of devices for treating smoke or fumes
- F23J15/02—Arrangements of devices for treating smoke or fumes of purifiers, e.g. for removing noxious material
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Treating Waste Gases (AREA)
Abstract
The invention discloses a method for controlling the inside of an acid pollutant furnace in the process of blending and burning industrial organic solid waste of household garbage, which comprises the following steps: spraying powder treating agent to the garbage to be incinerated at the feed inlet of the hearth, and spraying the powder treating agent at a nozzle arranged in the high-temperature flue; the powder treating agent is a modified manganese-containing mixture. The improved treating agent component is adopted to treat the waste incineration flue gas, the generation of acidic substances in the flue gas is reduced by spraying the waste into the waste, the acidic substances in the flue gas are removed by spraying the waste into the flue gas, the removal rate of sulfur dioxide and chloride can reach more than 60% respectively, the removal rate of nitrogen oxide is more than 30%, and the pollutant concentration and the subsequent treatment load after blending combustion are effectively reduced.
Description
Technical Field
The invention relates to the technical field of solid waste and air pollution control, in particular to an in-furnace control method for acid pollutants in the process of blending and burning industrial organic solid waste by household garbage.
Background
The main pollutants of the household garbage incineration flue gas are dust, acid gas (CO and NO) X 、SO 2 HCl, etc.), heavy metals (Hg, cr, pb, etc.), and organic gases such as dioxin. Wherein dust is removed by a bag-type dust remover, organic gases such as heavy metals, dioxin and the like are removed by active carbon injection and the bag-type dust remover, and acid gases are removed by a deacidification process and a denitration process. The conventional household garbage incineration adopts dry method, wet method desulfurization and denitration to remove acid gas in flue gas. The dry method mainly comprises the steps of introducing lime powder into a neutralization tower, and carrying out neutralization reaction on the lime powder and acid gas in the neutralization tower to generate salt substances, so that the acid gas in the flue gas is removed, and the purpose of deacidification is achieved. But adopts dry deacidification, the lime powder has high consumption, low deacidification efficiency and higher cost. In addition, lime powder which does not participate in deacidification in the neutralization tower enters the bag-type dust collector along with the flue gas under the flowing of the flue gas, is intercepted by the bag and is adsorbed on the surface of the bag, and at the moment, acid gas passing through the bag can still react with the lime powder in part. After the bag-type dust collector operates for a period of time, more and more dust is adsorbed on the surface of the bag, so that the resistance of the smoke passing through the bag is larger and larger, and the normal operation of equipment is affected, and therefore, when the resistance of the bag reaches a certain value, the bag is subjected to soot blowing to reduce the resistance. When the cloth bag is blown, lime powder with the unreacted surface can be discharged out of the flue gas treatment system, so that a great amount of waste is caused. The wet deacidification adopts alkaline circulating water to spray out through a spray nozzle in the desulfurizing tower through a circulating pump, and flue gas passes through the wet tower from bottom to top, is atomized alkaline water, and is neutralized with the alkaline water, so that the purpose of absorbing acid gas in the flue gas is achieved.
However, the concentration of pollutants in industrial organic solid waste is high, especially the concentration of acidic pollutants in the process of blending and burning household garbage, and the conventional dry method and wet method are high in flue gas treatment cost and difficult to achieve a satisfactory treatment effect, so how to control and reduce the generation and emission of the acidic pollutants from the source is a problem to be solved urgently by those skilled in the art.
Disclosure of Invention
In view of the above, the invention provides a method for controlling the acid pollutant in the process of blending and burning industrial organic solid waste in household garbage, which reduces the concentration of acid substances in flue gas from the source.
In order to achieve the above purpose, the invention adopts the following technical scheme:
an in-furnace control method for acid pollutants in a household garbage co-combustion industrial organic solid waste process comprises the following processes:
spraying powder treating agent to the garbage to be incinerated at the feed inlet of the hearth, and spraying the powder treating agent at a nozzle arranged in the high-temperature flue;
the powder treating agent is a modified manganese-containing mixture.
Preferably, the modified manganese-containing mixture is a mixture of a manganese-based compound, calcium oxide and an ammonium salt.
Further, the manganese compound is a mixture of manganese oxide and manganese sulfate, wherein the manganese oxide accounts for 0.5-30% of the total weight of the manganese compound, and the manganese sulfate accounts for 70-99.5% of the total weight of the manganese compound. .
Further, the ammonium salt is one or more of ammonium sulfate or ammonium sulfite.
The specific reaction is as follows:
NO x +MnO X →Mn(NO 3 ) 2
SO x +MnO X →MnSO 4
NH 3 +HCl→NH 4 Cl
CaO+HF→CaF 2 。
further, the mass ratio of the manganese compound to the calcium oxide is (1-10): (10-30).
Further, the mass percentage of the ammonium salt in the treating agent is 0.5-10%.
Preferably, the total dosage of the treating agent is 0.01-2% of the total weight of the treated garbage, wherein the high-temperature flue is sprayed with the treating agent accounting for 60-99.5% of the total dosage.
Preferably, the inner nozzle of the high-temperature flue is arranged in a region with the temperature of 950-1200 ℃ above the hearth of the grate furnace.
Preferably, the nozzles in the high-temperature flue are arranged in an angular or wall-mounted mode, and 4 or 12 nozzles are arranged.
Preferably, the particle size of the treating agent is 60-70 mu m, the air is carried and sprayed into the center of the flue at the spraying speed of 50m/s in a direct current mode, and the swirling strength is 1-4.5.
Compared with the prior art, the invention discloses an in-furnace control method for acid pollutants in the process of blending and burning industrial organic solid wastes of household garbage, which has the following beneficial effects:
the modified treating agent component is adopted to treat the waste incineration flue gas, part of the modified treating agent component is sprayed into the waste to reduce the generation of acidic substances in the flue gas, and the other part of the modified treating agent component is sprayed into the flue gas to remove the acidic substances in the flue gas, so that the removal rate of sulfur dioxide and chloride can reach more than 60 percent and the removal rate of nitrogen oxides can reach more than 30 percent respectively.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are required to be used in the embodiments or the description of the prior art will be briefly described below, and it is obvious that the drawings in the following description are only embodiments of the present invention, and that other drawings can be obtained according to the provided drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic view of an angular arrangement;
FIG. 2 is a schematic view of a wall-mounted structure;
in the figure, a 1-high temperature flue and a 2-nozzle are shown.
Detailed Description
The technical solutions of the present invention will be clearly and completely described in connection with the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Example 1
The total amount of the treating agent is 0.5% of the total weight of the garbage. As shown in figure 1, the method for controlling the acid pollutant in the process of mixing and burning the industrial organic solid waste by the household garbage comprises the steps of spraying a powder treating agent to the garbage to be burned at a feed inlet of a hearth, wherein the spraying amount is 0.5% of the total weight of the treating agent; in the area of 1100-1200 deg.c over the furnace hearth of the fire grate in the high temperature flue, spray powder treating agent via angular nozzles, 4 nozzles, one nozzle in each corner, the spraying amount is 99.5% of the total weight of the treating agent, and the direct current spraying mode is carried with air to spray at the center of the flue at the spraying speed of 50m/s and the swirl strength of 2.5.
The powder treating agent is a modified manganese-containing mixture, has the particle size of 60-70 mu m, and comprises manganese compounds ((containing 1wt% of manganese oxide and 99wt% of manganese sulfate) and calcium oxide and ammonium sulfate, wherein the mass ratio of the manganese compounds to the calcium oxide is 3:15, the mass ratio of the ammonium sulfate in the treating agent is 1%.
Example 2
The difference from example 1 is that the total amount of the treating agent is 1% of the total weight of the garbage, the spraying amount of the garbage to be incinerated is 10% of the total weight of the treating agent, the spraying amount in the high-temperature flue is 90% of the total weight of the treating agent, and the mass ratio of the manganese compound (containing 8wt% of manganese oxide and 92wt% of manganese sulfate) to the calcium oxide is 3:10.
example 3
The total amount of the treating agent is 2% of the total weight of the garbage. As shown in fig. 2, in the method for controlling the acid pollutant in the process of blending and burning industrial organic solid waste of the household garbage, powder treating agent is sprayed on the garbage to be burned at a feed inlet of a hearth, and the spraying amount is 20% of the total weight of the treating agent; spraying powder treating agent into the furnace hearth of the fire grate in the high temperature flue in the area with the temperature of 950-1100 ℃, arranging 12 nozzles in a wall-mounted mode, arranging 4 nozzles in each layer, arranging one nozzle in the center of each surface of the flue, carrying and spraying air in a direct current spraying mode, wherein the spraying amount accounts for 80% of the total weight of the treating agent, and spraying the air into the center of the flue at the spraying speed of 50m/s, wherein the rotational flow strength is 4.5.
The powder treating agent is a modified manganese-containing mixture, has the particle size of 60-70 mu m, and comprises manganese compounds (containing 20wt% of manganese oxide and 80wt% of manganese sulfate), calcium oxide and ammonium sulfite, wherein the mass ratio of the manganese compounds to the calcium oxide is 1:3, the mass ratio of the ammonium sulfite in the treating agent is 1%.
The untreated flue gas is used as a blank group, the flue gas treated by the method in the embodiment 1-3 is used as an experimental group, the flue gas is monitored by adopting a flue gas online analyzer, and the detection result shows that the flue gas composition concentration of the garbage incineration flue gas blank control group is respectively SO x 425.1mg/m 3 、NO x 375.0mg/m 3 、HCL36.7mg/m 3 。
The processing effect of each embodiment is as follows:
example 1 SO in flue gas 2 168.3mg/m 3 ，NO x 253.6mg/m 3 、HCL13.3mg/m 3 ；
Example 2 case SO in flue gas 2 152.9mg/m 3 ，NO x 224.9mg/m 3 、HCL11.9mg/m 3 ；
Example 3 SO in flue gas 2 150.5mg/m 3 ，NO x 201.5mg/m 3 、HCL10.7mg/m 3 ；
The results show that the method of the invention adopted in examples 1-3 can respectively achieve more than 60 percent of removal rate of sulfur dioxide and chloride in the furnace and more than 30 percent of removal rate of nitrogen oxide.
In the present specification, each embodiment is described in a progressive manner, and each embodiment is mainly described in a different point from other embodiments, and identical and similar parts between the embodiments are all enough to refer to each other. For the device disclosed in the embodiment, since it corresponds to the method disclosed in the embodiment, the description is relatively simple, and the relevant points refer to the description of the method section.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (10)
1. An in-furnace control method for acid pollutants in a household garbage co-combustion industrial organic solid waste process is characterized by comprising the following steps:
spraying powder treating agent to the garbage to be incinerated at the feed inlet of the hearth, and spraying the powder treating agent at a nozzle arranged in the high-temperature flue;
the powder treating agent is a modified manganese-containing mixture.
2. The method for controlling the acidic pollutants in the process of blending and burning industrial organic solid wastes with household garbage according to claim 1, wherein the modified manganese-containing mixture is a mixture of a manganese compound, calcium oxide and ammonium salt.
3. The method for controlling the acid pollutant in the household garbage co-combustion industrial organic solid waste process in the furnace according to claim 2, wherein the manganese compound is a mixture of manganese oxide and manganese sulfate, wherein the manganese oxide accounts for 0.5-30% of the total weight of the manganese compound, and the manganese sulfate accounts for 70-99.5% of the total weight of the manganese compound.
4. The method for controlling the acid pollutant in the process of blending and burning industrial organic solid waste in household garbage according to claim 2, wherein the ammonium salt is one or more of ammonium sulfate or ammonium sulfite.
5. The method for controlling the acid pollutant in the household garbage co-combustion industrial organic solid waste process in the furnace according to claim 2, wherein the mass ratio of the manganese compound to the calcium oxide is (1-10): (10-30).
6. The method for controlling the acid pollutant in the household garbage co-combustion industrial organic solid waste process in the furnace according to claim 2, wherein the mass percentage of ammonium salt in the treating agent is 0.5% -10%.
7. The method for controlling the acid pollutant in the process of blending and burning industrial organic solid waste in household garbage according to claim 1, wherein the total amount of the treating agent is 0.01-2% of the total weight of the treated garbage, and the high-temperature flue is sprayed with the treating agent accounting for 60-99.5% of the total amount.
8. The method for controlling the acidic pollutants in the process of blending and burning industrial organic solid wastes with household garbage according to claim 1, wherein the high-temperature flue inner nozzle is arranged in a region with the temperature of 950-1200 ℃ above the hearth of the fire grate furnace.
9. The method for controlling the acid pollutant in the household garbage co-combustion industrial organic solid waste process in the furnace according to claim 1 or 8, wherein the high-temperature flue inner nozzles are arranged in an angular or wall-mounted mode, and 4 or 12 nozzles are arranged.
10. The method for controlling the acid pollutant in the process of blending and burning industrial organic solid waste in the household garbage according to claim 1, wherein the grain size of the treating agent is 60-70 μm, the air is carried and sprayed, the spraying speed is 50m/s, the direct current is sprayed into the center of a flue, and the rotational flow strength is 1-4.5.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310874045.0A CN116734265B (en) | 2023-07-17 | 2023-07-17 | In-furnace control method for acidic pollutants in household garbage co-combustion industrial organic solid waste process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310874045.0A CN116734265B (en) | 2023-07-17 | 2023-07-17 | In-furnace control method for acidic pollutants in household garbage co-combustion industrial organic solid waste process |
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| CN116734265A true CN116734265A (en) | 2023-09-12 |
| CN116734265B CN116734265B (en) | 2024-05-14 |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2918580A1 (en) * | 1979-05-09 | 1980-11-20 | Pauli Gmbh Waermetechnik | Domestic or industrial refuse incineration - injects powdered lime into one or more feed-hoppers or chutes |
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| CN115487657A (en) * | 2022-09-20 | 2022-12-20 | 陈少男 | Solid denitration agent and preparation method and application thereof |
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-
2023
- 2023-07-17 CN CN202310874045.0A patent/CN116734265B/en active Active
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| DE2918580A1 (en) * | 1979-05-09 | 1980-11-20 | Pauli Gmbh Waermetechnik | Domestic or industrial refuse incineration - injects powdered lime into one or more feed-hoppers or chutes |
| EP0173640A2 (en) * | 1984-07-30 | 1986-03-05 | Mitsubishi Jukogyo Kabushiki Kaisha | Method for treating exhaust gas |
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| JPH0533916A (en) * | 1991-07-29 | 1993-02-09 | Nippon Steel Corp | Treatment of waste by means of rotary kiln and rotary kiln therefor |
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| Publication number | Publication date |
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| CN116734265B (en) | 2024-05-14 |
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