CN110878942A - Desulfurization method in rotary kiln of hazardous waste incineration system - Google Patents
Desulfurization method in rotary kiln of hazardous waste incineration system Download PDFInfo
- Publication number
- CN110878942A CN110878942A CN201911111382.4A CN201911111382A CN110878942A CN 110878942 A CN110878942 A CN 110878942A CN 201911111382 A CN201911111382 A CN 201911111382A CN 110878942 A CN110878942 A CN 110878942A
- Authority
- CN
- China
- Prior art keywords
- rotary kiln
- hazardous waste
- incineration system
- desulfurization
- waste
- 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
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
- F23G5/32—Incineration of waste; Incinerator constructions; Details, accessories or control therefor the waste being subjected to a whirling movement, e.g. cyclonic incinerators
-
- 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
-
- 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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
- F27B7/00—Rotary-drum furnaces, i.e. horizontal or slightly inclined
Abstract
The invention discloses a desulfurization method in a rotary kiln of a hazardous waste incineration system, which comprises the following steps: adding a certain proportion of desulfurizer into the hazardous waste to be incinerated in the kiln, uniformly mixing, burning in a rotary kiln, controlling the kiln temperature of the rotary kiln and the retention time of the waste, discharging the desulfurization reaction product out of the system along with the slag after complete reaction, and discharging the flue gas up to the standard. The invention has the advantages that: the used desulfurizer is cheap and easily available, an additional desulphurization device is not required to be added, the hazardous waste with the sulfur content higher than the feeding limit value of the incineration system can be treated, and the standard emission of the flue gas is ensured.
Description
Technical Field
The invention belongs to the technical field of harmless treatment of hazardous wastes, and particularly relates to a desulfurization method in a rotary kiln of a hazardous waste incineration system.
Background
The high-temperature incineration disposal of hazardous wastes is an important process for disposing hazardous wastes, and is mature and applied in China. Because of the limits of process equipment and flue gas emission indexes, the hazardous waste incineration system has strict requirements on S, Cl content of treated hazardous waste, generally, the S content is not more than 2%, the Cl content is not more than 1%, and if the content exceeds the standard, a matched rear-end flue gas treatment system cannot meet the requirements, so that the equipment corrosion is aggravated, and the flue gas is excessively discharged. However, as a centralized comprehensive hazardous waste disposal center, the collected wastes are various in types, the waste components are also different, the compatibility difficulty is high, especially for large amounts of high-S-content wastes, the mixed compatibility of the pretreatment stage at the front end of the system and the flue gas treatment at the rear end of the system cannot be coped with at all, and the in-kiln desulfurization is designed at the incineration disposal stage for solving the problems of similar wastes with slightly high S content.
Disclosure of Invention
The invention aims to provide a desulfurization method in a rotary kiln of a hazardous waste incineration system, which can remove part of S in waste in the rotary kiln of the incineration system and reduce the pressure of rear-end flue gas treatment.
The technical scheme of the invention is realized as follows:
a desulfurization method in a rotary kiln of a hazardous waste incineration system comprises the following steps: adding a certain proportion of desulfurizer into the dangerous waste with the sulfur content higher than the incineration feeding limit value, uniformly mixing, burning in a rotary kiln, controlling the temperature of the rotary kiln and the retention time of the waste, discharging the desulfurization reaction product out of the system along with the slag after the reaction is completed, and discharging the flue gas up to the standard.
Preferably, the hazardous waste with a sulfur content above the incineration feed limit is a hazardous waste with a sulfur content between 2% and 5%.
Preferably, the desulfurizing agent is limestone seed material; the particle size of the desulfurizer is 5-15 mm; the content of CaCO3 in the desulfurizer is more than 80 percent; the addition amount of the desulfurizer accounts for 10% -15% of the amount of the hazardous waste.
Preferably, the kiln temperature of the rotary kiln is 830-850 ℃.
Preferably, the waste residence time is from 55 to 65 minutes.
Preferably, the discharging system is discharged through a kiln tail slag remover and a boiler bottom ash discharger.
The standard emission of the flue gas meets the emission standard of hazardous waste incineration pollution control standard.
The principle of the invention is as follows:
after high-temperature incineration at about 850 ℃, S in the waste reacts to generate SO2, limestone doped in the materials is heated and decomposed in the rotary kiln to generate CaO, the CaO and the SO2 react in the rotary kiln in a contact manner to generate CaSO4, and the generated CaSO4 is discharged out of the system along with the slag.
The invention has the beneficial effects that:
(1) the source is desulfurized, the corrosion of equipment is reduced, and the flue gas is discharged after reaching standards.
(2) The hazardous waste with the S content higher than the feeding limit value can be treated by the incineration system, and the adaptability of the hazardous waste incineration system is improved.
(3) The used materials are easy to take and cheap, the operation is simple, and the operation is safe and reliable.
Detailed Description
The technical solutions in the embodiments of the present invention are clearly and completely described below, and it is obvious that the described embodiment is only one embodiment of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1
The cyanide-containing waste residues to be treated in a certain hazardous waste treatment center are taken as treatment objects, the incineration treatment capacity is designed to be 30t/d, and the waste residue components are as follows: total cyanogen =831mg/kg, total sulphur =4.303mg/kg, total chlorine =0.122mg/kg, calorific value =2338 cal/g.
The cyanogen-containing waste residue is treated by the method of the invention: adding limestone seeds with the waste amount of 14 percent into the cyanogen-containing waste residues, uniformly mixing, burning in a rotary kiln, controlling the temperature of the rotary kiln to be 830-850 ℃, controlling the retention time of the wastes to be 65min, and discharging the desulfurization reaction products out of a system along with the waste residues after the reaction is completed.
Measuring the flue gas emission index: SO2=200mg/m3, HCl =8mg/m3
Example 2
The mixture to be treated in a certain hazardous waste treatment center is taken as a treatment object, the designed incineration disposal capacity is 30t/d, and the content of waste residues is as follows: total sulfur =3.633mg/kg, total chlorine =0.249mg/kg, calorific value =4650 cal/g.
The cyanogen-containing waste residue is treated by the method of the invention: adding 12% of limestone seeds into the cyanogen-containing waste residues, uniformly mixing, burning in a rotary kiln, controlling the kiln temperature of the rotary kiln to be 830-850 ℃, controlling the retention time of wastes to be 60min, and discharging the desulfurization reaction products out of a system along with the slag after the reaction is completed.
Measuring the flue gas emission index: SO2=125mg/m3, HCl =12mg/m3
Example 3
The method is characterized in that oil sludge to be treated in a certain hazardous waste treatment center is taken as a treatment object, the designed incineration treatment capacity is 30t/d, and the content of waste residues is as follows: total sulfur =2.528mg/kg, total chlorine =0.378mg/kg, and calorific value =4812 cal/g.
The cyanogen-containing waste residue is treated by the method of the invention: adding 10% of limestone seed materials into the cyanogen-containing waste residues, uniformly mixing, burning in a rotary kiln, controlling the kiln temperature of the rotary kiln to be 830-850 ℃, controlling the retention time of wastes to be 60min, and discharging desulfurization reaction products out of a system along with the slag after the reaction is completed.
Measuring the flue gas emission index: SO2=78mg/m3, HCl =23mg/m3
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (6)
1. A desulfurization method in a rotary kiln of a hazardous waste incineration system is characterized by comprising the following steps: the method comprises the following steps: adding a desulfurizing agent into the dangerous waste with the sulfur content higher than the incineration feeding limit value, uniformly mixing, burning in a rotary kiln, controlling the temperature of the rotary kiln and the retention time of the waste, discharging the desulfurization reaction product out of the system along with the slag after the reaction is completed, and discharging the flue gas up to the standard.
2. The method for desulfurizing a hazardous waste incineration system rotary kiln according to claim 1, wherein the hazardous waste having a sulfur content higher than the incineration feed limit is a hazardous waste having a sulfur content of 2% to 5%.
3. The desulfurization method in a rotary kiln of a hazardous waste incineration system according to claim 1, wherein the desulfurizing agent is limestone seed material; the particle size of the desulfurizer is 5-15 mm; the content of CaCO3 in the desulfurizer is more than 80 percent; the addition amount of the desulfurizer accounts for 10% -15% of the amount of the hazardous waste.
4. The desulfurization method in a rotary kiln of a hazardous waste incineration system according to claim 1, wherein the temperature of the rotary kiln is 830 to 850 ℃.
5. The method for desulfurizing a hazardous waste incineration system in a rotary kiln according to claim 1, wherein the waste retention time is 55 to 65 minutes.
6. The method for desulfurization in a rotary kiln for a hazardous waste incineration system according to claim 1, wherein the exhaust system is exhausted through a kiln tail slag remover and a boiler bottom ash discharger.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911111382.4A CN110878942A (en) | 2019-11-14 | 2019-11-14 | Desulfurization method in rotary kiln of hazardous waste incineration system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911111382.4A CN110878942A (en) | 2019-11-14 | 2019-11-14 | Desulfurization method in rotary kiln of hazardous waste incineration system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110878942A true CN110878942A (en) | 2020-03-13 |
Family
ID=69729518
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911111382.4A Pending CN110878942A (en) | 2019-11-14 | 2019-11-14 | Desulfurization method in rotary kiln of hazardous waste incineration system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110878942A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112128779A (en) * | 2020-09-23 | 2020-12-25 | 安徽浩悦环境科技有限责任公司 | Incineration treatment method for high-chlorine-content hazardous waste |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101839488A (en) * | 2010-03-22 | 2010-09-22 | 昆明理工大学 | Method for gasifying and incinerating combustible solid wastes by utilizing rotary kiln |
| CN106500105A (en) * | 2016-09-30 | 2017-03-15 | 江西东江环保技术有限公司 | The incineration treatment method of waste |
| CN107010856A (en) * | 2017-04-11 | 2017-08-04 | 南昌赣亨行技术开发有限公司 | A kind of petroleum coke fuel sulfur method for dry method cement rotary kiln |
| CN110052141A (en) * | 2019-06-06 | 2019-07-26 | 天津水泥工业设计研究院有限公司 | The desulphurization denitration dedusting minimum discharge technique and system of sour feedstock production cement |
-
2019
- 2019-11-14 CN CN201911111382.4A patent/CN110878942A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101839488A (en) * | 2010-03-22 | 2010-09-22 | 昆明理工大学 | Method for gasifying and incinerating combustible solid wastes by utilizing rotary kiln |
| CN106500105A (en) * | 2016-09-30 | 2017-03-15 | 江西东江环保技术有限公司 | The incineration treatment method of waste |
| CN107010856A (en) * | 2017-04-11 | 2017-08-04 | 南昌赣亨行技术开发有限公司 | A kind of petroleum coke fuel sulfur method for dry method cement rotary kiln |
| CN110052141A (en) * | 2019-06-06 | 2019-07-26 | 天津水泥工业设计研究院有限公司 | The desulphurization denitration dedusting minimum discharge technique and system of sour feedstock production cement |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112128779A (en) * | 2020-09-23 | 2020-12-25 | 安徽浩悦环境科技有限责任公司 | Incineration treatment method for high-chlorine-content hazardous waste |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108559857B (en) | Waste mercury catalyst mercury recovery and slag harmless treatment process | |
| US7767188B2 (en) | Calcium-sodium polysulfide chemical reagent and production methods | |
| AUPN644895A0 (en) | Method and apparatus for waste treatment | |
| CA2704526C (en) | A method for stabilization and/or fixation of leachable metals | |
| CN110624374A (en) | Moving bed active coke desulfurization and denitrification system and method for recycling waste active coke powder | |
| CN110878942A (en) | Desulfurization method in rotary kiln of hazardous waste incineration system | |
| CN111359422A (en) | Efficient dry deacidification device and method for waste incineration flue gas | |
| CN111594853A (en) | Coke inhibitor for hazardous waste incineration kiln | |
| CN110748895A (en) | High-sulfur waste incineration treatment system and treatment method | |
| CN114671589B (en) | Method for synergistic harmless recycling treatment of oil sludge and fly ash | |
| CN110624387A (en) | Method for preparing alkali liquor and replacing desulfurizer by using coal cinder | |
| JPH10180222A (en) | Treatment of waste incineration fly ash | |
| JPH10180221A (en) | Treatment of waste incineration fly ash | |
| CN103791505A (en) | Chemical waste disposal system | |
| CN114410364B (en) | Solid decoking agent for garbage and hazardous waste incinerator and preparation method thereof | |
| JP7449714B2 (en) | Waste treatment method | |
| CN114225665B (en) | Method for disposing waste iron oxide desulfurizing agent | |
| JP7000812B2 (en) | A method for treating heavy metal-containing ash containing lead and mercury components, and an elution inhibitor for mercury components contained in heavy metal-containing ash. | |
| CN113048480B (en) | Harmless treatment method for garbage in high-altitude low-oxygen area | |
| JP2000033351A (en) | Method for desulfurizing and defluorinating neutralized sludge | |
| CN101644438A (en) | Method for controlling dioxin pollution during treating waste | |
| JP4535888B2 (en) | Solid waste disposal method | |
| JPS5914076B2 (en) | Acid tar neutralization and combustion method and apparatus | |
| CN113713601A (en) | Hazardous waste incineration flue gas desulfurization method and device based on in-furnace calcium spraying | |
| JP3988624B2 (en) | Fixing agent for mercury-containing ash |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20200313 |