CN117109011A - Addition amount optimization method for incinerator auxiliary agent - Google Patents
Addition amount optimization method for incinerator auxiliary agent Download PDFInfo
- Publication number
- CN117109011A CN117109011A CN202311238163.9A CN202311238163A CN117109011A CN 117109011 A CN117109011 A CN 117109011A CN 202311238163 A CN202311238163 A CN 202311238163A CN 117109011 A CN117109011 A CN 117109011A
- Authority
- CN
- China
- Prior art keywords
- incinerator
- addition amount
- fly ash
- optimizing
- auxiliary agent
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000000034 method Methods 0.000 title claims abstract description 38
- 239000012752 auxiliary agent Substances 0.000 title claims abstract description 13
- 238000005457 optimization Methods 0.000 title abstract description 5
- 239000010881 fly ash Substances 0.000 claims abstract description 24
- 239000000428 dust Substances 0.000 claims abstract description 16
- 239000003513 alkali Substances 0.000 claims abstract description 11
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 10
- 239000000654 additive Substances 0.000 claims abstract description 9
- 230000000996 additive effect Effects 0.000 claims abstract description 9
- 239000000463 material Substances 0.000 claims abstract description 9
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims abstract description 8
- 239000003546 flue gas Substances 0.000 claims abstract description 8
- 238000001179 sorption measurement Methods 0.000 claims abstract description 5
- 239000010802 sludge Substances 0.000 claims description 15
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical group [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 claims description 11
- 229910001861 calcium hydroxide Inorganic materials 0.000 claims description 11
- 239000000920 calcium hydroxide Substances 0.000 claims description 11
- 238000001514 detection method Methods 0.000 claims description 7
- 239000002585 base Substances 0.000 claims description 5
- 239000002699 waste material Substances 0.000 abstract description 9
- 239000002910 solid waste Substances 0.000 abstract description 6
- 239000003344 environmental pollutant Substances 0.000 abstract description 3
- 231100000719 pollutant Toxicity 0.000 abstract description 3
- 235000011116 calcium hydroxide Nutrition 0.000 description 10
- 239000002920 hazardous waste Substances 0.000 description 8
- 238000006477 desulfuration reaction Methods 0.000 description 7
- 230000023556 desulfurization Effects 0.000 description 7
- 238000005070 sampling Methods 0.000 description 7
- 239000003245 coal Substances 0.000 description 5
- RAHZWNYVWXNFOC-UHFFFAOYSA-N Sulphur dioxide Chemical compound O=S=O RAHZWNYVWXNFOC-UHFFFAOYSA-N 0.000 description 4
- 239000002893 slag Substances 0.000 description 4
- 239000002002 slurry Substances 0.000 description 4
- 239000000126 substance Substances 0.000 description 4
- 239000002351 wastewater Substances 0.000 description 4
- 230000007613 environmental effect Effects 0.000 description 3
- 238000004065 wastewater treatment Methods 0.000 description 3
- 239000002253 acid Substances 0.000 description 2
- 239000002761 deinking Substances 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 1
- 229910021578 Iron(III) chloride Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 230000003750 conditioning effect Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- IXCSERBJSXMMFS-UHFFFAOYSA-N hydrogen chloride Substances Cl.Cl IXCSERBJSXMMFS-UHFFFAOYSA-N 0.000 description 1
- 229910000041 hydrogen chloride Inorganic materials 0.000 description 1
- RBTARNINKXHZNM-UHFFFAOYSA-K iron trichloride Chemical compound Cl[Fe](Cl)Cl RBTARNINKXHZNM-UHFFFAOYSA-K 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000006386 neutralization reaction Methods 0.000 description 1
- 238000012946 outsourcing Methods 0.000 description 1
- 239000010893 paper waste Substances 0.000 description 1
- 229920002401 polyacrylamide Polymers 0.000 description 1
- 238000011085 pressure filtration Methods 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 239000007787 solid 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
- F23G5/50—Control or safety arrangements
-
- 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
- F23J15/003—Arrangements of devices for treating smoke or fumes for supplying chemicals to fumes, e.g. using injection devices
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES
- F23J7/00—Arrangement of devices for supplying chemicals to fire
Abstract
The invention discloses an addition amount optimization method of an incinerator auxiliary agent, which comprises the following steps: firstly, collecting fly ash in a primary bag-type dust collector arranged before an activated carbon adsorption step in an incinerator flue gas treatment process, detecting the pH value of the fly ash, and then according to the characteristic of an additive (alkali) added during incineration of the incinerator, combining the pH result of the detected fly ash, and adjusting the dosage of the added additive, so that the fly ash is controlled outside the category of dangerous waste solid waste from the source, the material waste is avoided, and the pollutant treatment cost is reduced.
Description
Technical Field
The invention relates to the technical field of environmental protection, in particular to an addition amount optimization method of an incinerator auxiliary agent.
Background
The production process of enterprises generates a large amount of various solid wastes, and the solid wastes in the 'national hazardous waste directory' (2021) edition are identified as hazardous wastes without identification. However, the enterprises cannot judge the dangerous characteristics of the directory, and the enterprise cannot judge the dangerous characteristics of the directory through authentication work. The identification work is carried out according to the solid waste identification standard rule (GB 34330-2017), the hazardous waste identification technical specification (HJ 298-2019) and the hazardous waste identification standard rule (GB 5085.7-2019), and the dangerous characteristics, sampling, detection and result output possibly existing in the hazardous waste process are analyzed in the prior art. However, in practical work, it is found that the dangerous characteristics of some solid wastes can be changed by optimizing the process flow and adjusting the process parameters, so that the generation of dangerous wastes is controlled from the source, and the dangerous characteristics of the solid wastes can be eliminated. However, there are no reports in the prior art.
Therefore, how to provide a method for controlling hazardous waste generation from the source by adjusting the incinerator through sampling detection feedback is a problem to be solved by those skilled in the art.
Disclosure of Invention
In view of the above, the invention provides an addition optimizing method of an incinerator auxiliary agent, which improves the process flow and adjusts the process parameters after sampling and detecting the fly ash of a primary bag-type dust collector of the incinerator, and eliminates dangerous waste solid pollutants.
In order to achieve the above purpose, the invention adopts the following technical scheme:
an addition amount optimization method of an incinerator additive comprises the following steps:
(1) Collecting fly ash in a bag-type dust collector in the flue gas treatment flow of the incinerator, and detecting the pH value of the fly ash;
(2) And (3) adjusting the dosage of the added auxiliary agent according to the characteristic of the auxiliary agent added during incineration of the incinerator and the pH detection result of the step (1).
Further, at least two stages of bag-type dust collectors are arranged in the flue gas treatment flow of the incinerator in the step (1), the first stage of bag-type dust collectors are arranged before the activated carbon adsorption flow, and the collected fly ash is from the first stage of bag-type dust collectors.
Preferably, the incinerator is used for incinerating light sludge of paper enterprises.
Preferably, the auxiliary agent is a base.
Further, the base is calcium hydroxide.
Further, the adjustment in the step (2) is specifically as follows:
if the pH is more than or equal to 12.5, reducing the addition amount of alkali into the incinerator;
if the pH value is less than or equal to 2, the adding amount of alkali in the incinerator is increased.
Preferably, the weight ratio of the alkali addition amount to the incineration material amount in the incinerator is less than or equal to 0.35%.
Compared with the prior art, the invention discloses an addition optimizing method of the incinerator auxiliary agent, which has the following beneficial effects:
according to the invention, the pH value of the fly ash in the primary bag-type dust collector before the activated carbon adsorption process is detected, the characteristic of adding substances in the incineration process is analyzed from the obtained pH result, and the dosage of the adding substances is adjusted according to the pH value and the environmental protection requirement, so that the fly ash is controlled outside the dangerous waste list from the source, the material waste is avoided, and the pollutant treatment cost is reduced.
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 treatment flow of the incinerator according to the embodiment 1 of the present invention;
FIG. 2 shows the results of the sampling test of fly ash before adjustment;
FIG. 3 shows the results of the sampling test of the fly ash after adjustment.
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 implementation object is as follows: the 500t/d incinerator is used for incinerating waste residues (including light residues mixed in imported waste paper and slurry residues formed by intercepting high-concentration waste water through an inclined screen) generated in the papermaking process and sludge generated by treatment of waste water treatment stations built by companies, and raw coal is added for supporting combustion during incineration. The specific flue gas treatment flow is shown in figure 1; the flue gas of the incinerator is treated by a denitration, semi-dry desulfurization, a primary bag-type dust remover, activated carbon adsorption and a secondary bag-type dust remover. Wherein the identification object is fly ash collected by the primary bag-type dust collector.
The raw materials entering the incinerator are as follows:
first, light slag
(II) slurry residue:
the high-concentration waste water produced in the papermaking process contains a large amount of paper shredding residues which cannot be utilized, the paper shredding residues are cut by an inclined screen, the pulp residues are obtained after squeezing, the water content is 65%, the main component is paper fibers, and the paper shredding residues enter an incinerator for treatment.
(III) sludge:
according to the characteristics of the production wastewater, the wastewater treatment station of the enterprise adopts an anaerobic and aerobic two-stage biological treatment and Fenton treatment process to treat the wastewater. The wastewater treatment process comprises the steps of generating three types of sludge, namely primary sludge, activated sludge and Fenton sludge, mixing and collecting the primary sludge and the activated sludge, pretreating (pressure filtration, conditioning by polyacrylamide and polyaluminium ferric chloride), enabling the water content to be lower than 45%, and enabling the Fenton sludge not to enter an incinerator for treatment. In addition, deinking sludge generated in the enterprise deinking process is treated outside the incinerator and is not burnt.
Raw coal:
in order to prevent the incinerator from being unable to normally and continuously operate due to insufficient quantity of light slag, slurry slag and sludge, raw coal is added according to a certain proportion in the incineration process to mix with the waste slag and the sludge for burning. Raw coal is purchased from outsourcing and comes from Shanxi province.
100 fly ash samples are collected for pH detection, the detection result is shown in figure 2, the result shows that the fly ash is alkaline, the pH=11.65-12.7, and 41 samples in the 100 samples exceed the limit value of hazardous waste identification standard corrosiveness identification (GB 5085.1-2007).
According to the detection result and the incinerator characteristic, the alkalinity of the fly ash is analyzed, the incinerated flue gas firstly passes through a denitration and semi-dry desulfurization tower, the acid gas and the slaked lime in the desulfurization tower undergo a neutralization reaction, and the desulfurization dust contains acid-base substances and can be trapped in a primary dust remover, so that the fly ash contains acid-base substances. In the semi-dry desulfurization process, enterprises adopt a method of adding excessive calcium hydroxide to ensure that the emission concentration of sulfur dioxide is as low as possible, and the amount of incinerator incineration materials is 422-1615t/d and the amount of calcium hydroxide is 5-13t/d in the sampling period of 100 samples. The corrosiveness of fly ash exceeds standard, mainly due to excessive alkali addition. Through experimental process parameter adjustment, namely, optimizing the alkali addition amount, the relation between the incineration material amount and the alkali addition amount (namely, the amount of added calcium hydroxide) is as follows:
on the basis that the enterprise reduces and adds calcium hydroxide and the discharge concentration of acid gases such as sulfur dioxide and hydrogen chloride reaches the standard, 50 groups of sampling are carried out, and the purpose is to clearly improve the addition quantity parameter of the calcium hydroxide and reduce the pH value of the fly ash. During the experiment, the working condition is that the incineration material amount of the incinerator is 650-1280t/d, the semi-dry desulfurization adding amount of calcium hydroxide is 1.2-4.2t/d, the pH of the fly ash is shown as figure 3, and the pH is 7.35-12.32 as shown in figure 3. No sample in 50 samples had pH exceeding the limit of hazardous waste identification Standard corrosiveness identification (GB 5085.1-2007). The incinerator feeding incineration materials must strictly follow the specified types of environmental assessment, namely waste residues (light residues, slurry residues), sludge and coal, in addition, the adding amount of calcium hydroxide in the dry half-process desulfurization process is strictly controlled in the future, the adding amount of calcium hydroxide/total weight ratio of incineration materials is recommended to be controlled within 0.35% in terms of days, and the effective control of the pH value of fly ash is regularly ensured.
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 (7)
1. The method for optimizing the addition amount of the incinerator auxiliary agent is characterized by comprising the following steps of:
(1) Collecting fly ash in a bag-type dust collector in the flue gas treatment flow of the incinerator, and detecting the pH value of the fly ash;
(2) And (3) adjusting the dosage of the added auxiliary agent according to the characteristic of the auxiliary agent added during incineration of the incinerator and the pH detection result of the step (1).
2. The method for optimizing addition amount of auxiliary agent in incinerator according to claim 1, wherein at least two stages of bag-type dust collectors are arranged in the flue gas treatment process of the incinerator in the step (1), the first stage of bag-type dust collectors are arranged before the activated carbon adsorption process, and the collected fly ash is from the first stage of bag-type dust collectors.
3. The method for optimizing the addition amount of an incinerator additive according to claim 1, wherein the incinerator is light residue sludge incineration of a paper-making enterprise.
4. The method for optimizing the addition amount of an incinerator additive according to claim 1, wherein the additive is alkali.
5. The method for optimizing the addition amount of an incinerator additive according to claim 4, wherein the base is calcium hydroxide.
6. The method for optimizing the addition amount of an incinerator additive according to any one of claims 4 to 5, wherein the adjustment in the step (2) is specifically as follows:
if the pH is more than or equal to 12.5, reducing the addition amount of alkali into the incinerator;
if the pH value is less than or equal to 2, the adding amount of alkali in the incinerator is increased.
7. The method for optimizing the addition amount of an incinerator additive according to any one of claims 4 to 5, wherein the weight ratio of the addition amount of alkali to the amount of incineration materials in the incinerator is less than or equal to 0.35%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311238163.9A CN117109011A (en) | 2023-09-25 | 2023-09-25 | Addition amount optimization method for incinerator auxiliary agent |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311238163.9A CN117109011A (en) | 2023-09-25 | 2023-09-25 | Addition amount optimization method for incinerator auxiliary agent |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117109011A true CN117109011A (en) | 2023-11-24 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311238163.9A Pending CN117109011A (en) | 2023-09-25 | 2023-09-25 | Addition amount optimization method for incinerator auxiliary agent |
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Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000202395A (en) * | 1999-01-11 | 2000-07-25 | Ebara Corp | Treatment of ash collected by two-step-in-series type bag filter |
| JP2003340397A (en) * | 2002-05-28 | 2003-12-02 | Jfe Engineering Kk | Detoxifying treatment method for waste incineration ash and waste incineration equipment |
| JP3833697B1 (en) * | 2006-04-04 | 2006-10-18 | 株式会社神鋼環境ソリューション | Method and system for managing basicity and heavy metal concentration of incinerated ash |
| JP2010115588A (en) * | 2008-11-12 | 2010-05-27 | Kubota Corp | Melting treatment method of incineration ash and melting treatment equipment |
| CN102974201A (en) * | 2011-08-08 | 2013-03-20 | 同方环境股份有限公司 | Double pH adjustment flue gas desulphurization system and control method thereof |
| CN106000050A (en) * | 2016-06-27 | 2016-10-12 | 江苏佳羽环境科技有限公司 | Dedusting and desulfurizing system adopting double-alkali method |
| JP2021030187A (en) * | 2019-08-29 | 2021-03-01 | 株式会社神鋼環境ソリューション | Additive rate determination method and additive rate determination device |
| CN113843255A (en) * | 2021-09-13 | 2021-12-28 | 生态环境部华南环境科学研究所 | Sectional type stabilization treatment method and system for household garbage incineration fly ash |
-
2023
- 2023-09-25 CN CN202311238163.9A patent/CN117109011A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000202395A (en) * | 1999-01-11 | 2000-07-25 | Ebara Corp | Treatment of ash collected by two-step-in-series type bag filter |
| JP2003340397A (en) * | 2002-05-28 | 2003-12-02 | Jfe Engineering Kk | Detoxifying treatment method for waste incineration ash and waste incineration equipment |
| JP3833697B1 (en) * | 2006-04-04 | 2006-10-18 | 株式会社神鋼環境ソリューション | Method and system for managing basicity and heavy metal concentration of incinerated ash |
| JP2010115588A (en) * | 2008-11-12 | 2010-05-27 | Kubota Corp | Melting treatment method of incineration ash and melting treatment equipment |
| CN102974201A (en) * | 2011-08-08 | 2013-03-20 | 同方环境股份有限公司 | Double pH adjustment flue gas desulphurization system and control method thereof |
| CN106000050A (en) * | 2016-06-27 | 2016-10-12 | 江苏佳羽环境科技有限公司 | Dedusting and desulfurizing system adopting double-alkali method |
| JP2021030187A (en) * | 2019-08-29 | 2021-03-01 | 株式会社神鋼環境ソリューション | Additive rate determination method and additive rate determination device |
| CN113843255A (en) * | 2021-09-13 | 2021-12-28 | 生态环境部华南环境科学研究所 | Sectional type stabilization treatment method and system for household garbage incineration fly ash |
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