WO2018133047A1 - Injection chelating treatment method for waste incineration fly ash - Google Patents
Injection chelating treatment method for waste incineration fly ash Download PDFInfo
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- WO2018133047A1 WO2018133047A1 PCT/CN2017/071986 CN2017071986W WO2018133047A1 WO 2018133047 A1 WO2018133047 A1 WO 2018133047A1 CN 2017071986 W CN2017071986 W CN 2017071986W WO 2018133047 A1 WO2018133047 A1 WO 2018133047A1
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- WIPO (PCT)
- Prior art keywords
- fly ash
- chelating agent
- flue gas
- smoke
- waste incineration
- Prior art date
Links
- 239000010881 fly ash Substances 0.000 title claims abstract description 47
- 238000000034 method Methods 0.000 title claims abstract description 30
- 238000004056 waste incineration Methods 0.000 title claims abstract description 17
- 238000002347 injection Methods 0.000 title abstract description 3
- 239000007924 injection Substances 0.000 title abstract description 3
- 239000002738 chelating agent Substances 0.000 claims abstract description 25
- 239000000843 powder Substances 0.000 claims abstract description 16
- 239000007787 solid Substances 0.000 claims abstract description 6
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims description 31
- 239000003546 flue gas Substances 0.000 claims description 31
- 230000009920 chelation Effects 0.000 claims description 18
- 238000005507 spraying Methods 0.000 claims description 3
- 239000000779 smoke Substances 0.000 abstract description 9
- 239000013522 chelant Substances 0.000 abstract description 7
- 239000007921 spray Substances 0.000 description 7
- UIIMBOGNXHQVGW-UHFFFAOYSA-M Sodium bicarbonate Chemical compound [Na+].OC([O-])=O UIIMBOGNXHQVGW-UHFFFAOYSA-M 0.000 description 4
- 239000002002 slurry Substances 0.000 description 4
- ODINCKMPIJJUCX-UHFFFAOYSA-N Calcium oxide Chemical compound [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 description 3
- 239000003795 chemical substances by application Substances 0.000 description 3
- 239000010791 domestic waste Substances 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 description 2
- 235000011116 calcium hydroxide Nutrition 0.000 description 2
- 239000000920 calcium hydroxide Substances 0.000 description 2
- 229910001861 calcium hydroxide Inorganic materials 0.000 description 2
- 235000012255 calcium oxide Nutrition 0.000 description 2
- 239000000292 calcium oxide Substances 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 235000017557 sodium bicarbonate Nutrition 0.000 description 2
- 229910000030 sodium bicarbonate Inorganic materials 0.000 description 2
- 238000000889 atomisation Methods 0.000 description 1
- BRPQOXSCLDDYGP-UHFFFAOYSA-N calcium oxide Chemical compound [O-2].[Ca+2] BRPQOXSCLDDYGP-UHFFFAOYSA-N 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 239000004482 other powder Substances 0.000 description 1
- 238000004806 packaging method and process Methods 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000009919 sequestration Effects 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 238000005303 weighing Methods 0.000 description 1
Classifications
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- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62D—CHEMICAL MEANS FOR EXTINGUISHING FIRES OR FOR COMBATING OR PROTECTING AGAINST HARMFUL CHEMICAL AGENTS; CHEMICAL MATERIALS FOR USE IN BREATHING APPARATUS
- A62D3/00—Processes for making harmful chemical substances harmless or less harmful, by effecting a chemical change in the substances
- A62D3/30—Processes for making harmful chemical substances harmless or less harmful, by effecting a chemical change in the substances by reacting with chemical agents
- A62D3/33—Processes for making harmful chemical substances harmless or less harmful, by effecting a chemical change in the substances by reacting with chemical agents by chemical fixing the harmful substance, e.g. by chelation or complexation
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/38—Removing components of undefined structure
- B01D53/40—Acidic components
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09B—DISPOSAL OF SOLID WASTE NOT OTHERWISE PROVIDED FOR
- B09B3/00—Destroying solid waste or transforming solid waste into something useful or harmless
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09B—DISPOSAL OF SOLID WASTE NOT OTHERWISE PROVIDED FOR
- B09B5/00—Operations not covered by a single other subclass or by a single other group in this subclass
Definitions
- the invention relates to a waste incineration fly ash treatment method, in particular to a spray chelation treatment method for waste incineration fly ash.
- the domestic waste incineration power plant needs to deacidify the flue gas generated in the waste incineration process.
- the deacidification system in the domestic waste incineration flue gas treatment system is very mature, including dry and semi-dry methods, mainly using baking soda ( Sodium bicarbonate) or slaked lime (calcium hydroxide) or quicklime (calcium oxide) as deacidification agent. Dry method uses compressed air or Roots blower to atomize air and spray it into flue gas to achieve deacidification. Semi-dry method will be used.
- the deacidification agent is made into a slurry and then atomized into the flue gas.
- the fly ash is collected and chelating agent is added for chelation treatment.
- the current treatment method is to collect fly ash in the waste incineration power plant.
- a set of fly ash chelation processing equipment is set up behind the warehouse, including fly ash storage bins, weighing equipment, mixing equipment, packing equipment, loading equipment, etc., for the chelation treatment of fly ash.
- the cost of the chelating agent the cost of equipment operation, labor, water and electricity, overhaul, packaging, etc. of 100-200 yuan per ton is added.
- the fly ash chelate needs to be cured for 3-5 days before it leaves the factory. It requires a large amount of temporary storage space and consumes a large amount of secondary reverse loading and transportation workload.
- the chelation treatment of the fly ash of the domestic waste incineration power plant is another process after the deacidification treatment, and this process requires a series of special equipment and facilities, which brings the operation of the garbage incineration plant very much. Large operating costs.
- the present invention provides a jet chelation treatment method for waste incineration fly ash.
- the main content of the method is to directly spray a solid powder fly ash chelating agent into the flue gas by using a deacidification system, so that the chelating agent directly interacts with the smoke.
- the gas powder is mixed so that the fly ash in the flue gas completes the chelation process.
- the fly ash has reached the requirements of GB16889-2008, and the present invention utilizes the deacidification system to spray the chelating agent to the flue gas.
- the deacidification system can also be used to spray the powder having both chelation and deacidification functions into the flue gas to simultaneously deacidify and chelate the flue gas, thereby reducing the process flow and saving equipment. Take up space and effectively reduce operating expenses.
- the present invention provides a jet chelation treatment method for waste incineration fly ash, which is characterized in that a solid powder fly ash chelating agent is directly sprayed into the flue gas by using a deacidification system.
- the chelating agent is directly mixed with the flue gas powder, so that the fly ash in the flue gas completes the chelation process, which comprises the following steps:
- the powdered fly ash chelating agent is charged into the silo
- the metering device entering the bottom of the silo is metered
- the fly ash chelating agent is sprayed into the flue by using a deacidification spraying device
- the fly ash is collected by the fly ash collection and conveying system, packaged after humidification or directly loaded and transported.
- the present invention utilizes a deacidification system to spray a chelating agent into a flue gas to separately chelate the flue gas, and may also utilize The deacidification system sprays the powder with both chelation and deacidification functions into the flue gas to simultaneously deacidify and chelate the flue gas, which can reduce the process flow, save space occupied by equipment, and effectively reduce operating costs.
- a jet chelation treatment method for waste incineration fly ash characterized in that a solid powder fly ash chelating agent is directly sprayed into the flue gas by a dry deacidification system, so that the chelating agent is directly mixed with the flue gas powder, thereby making the smoke
- the fly ash in the gas completes the chelation process, which includes the following steps:
- the fly ash chelating agent is sprayed into the flue by a dry powder spraying device, and can be sprayed independently, or can be sprayed together with other powder consumables such as dry deacidification agent and activated carbon;
- a jet chelation treatment method for waste incineration fly ash characterized in that a solid powder fly ash chelating agent is directly sprayed into the flue gas by a semi-dry deacidification system, so that the chelating agent is directly mixed with the flue gas powder, thereby The fly ash in the flue gas completes the chelation process, which includes the following steps:
- the slurry preparation device entering the semi-dry deacidification system is made into a slurry
- the chelating agent may be sprayed into the flue gas by means of a deacidification system to separate the flue gas separately, or the deacidification system may be used to simultaneously have a chelate and deacidification function. Simultaneous deacidification and sequestration of the flue gas into the flue gas can reduce the process flow, save space occupied by equipment, and effectively reduce operating costs.
Landscapes
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Chemical & Material Sciences (AREA)
- General Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Biomedical Technology (AREA)
- Analytical Chemistry (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- General Health & Medical Sciences (AREA)
- Toxicology (AREA)
- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Processing Of Solid Wastes (AREA)
- Treating Waste Gases (AREA)
Abstract
An injection chelating treatment method for waste incineration fly ash, mainly using a deacidifying system to inject directly a solid powder fly ash chelating agent into smoke so as to mix the chelating agent directly with the smoke powder to complete the chelating process of the fly ash in the smoke. After collecting the waste incineration fly ash subsequently, the fly ash meets the requirements of GB16889-2008. According to the method, a deacidifying system is used to inject a chelating agent into smoke to individually chelate the smoke, or the deacidifying system is used to inject powder having deacidifying and chelating functions into the smoke to deacidify and chelate the smoke, thereby reducing the process, saving the space occupied by devices, and effectively reducing operating costs.
Description
本发明涉及一种垃圾焚烧飞灰处理方法，尤其是涉及一种垃圾焚烧飞灰的喷射螯合处理方法。The invention relates to a waste incineration fly ash treatment method, in particular to a spray chelation treatment method for waste incineration fly ash.
目前，生活垃圾焚烧发电厂需要对垃圾焚烧过程中产生的烟气进行脱酸处理，生活垃圾焚烧烟气处理系统中脱酸系统已经非常成熟，包括干法和半干法，主要采用小苏打(碳酸氢钠)或消石灰(氢氧化钙)或生石灰(氧化钙)作为脱酸剂，干法采用压缩空气或罗茨鼓风机流化空气雾化后喷入烟气中实现脱酸，半干法将脱酸剂制成浆液后雾化喷入烟气。At present, the domestic waste incineration power plant needs to deacidify the flue gas generated in the waste incineration process. The deacidification system in the domestic waste incineration flue gas treatment system is very mature, including dry and semi-dry methods, mainly using baking soda ( Sodium bicarbonate) or slaked lime (calcium hydroxide) or quicklime (calcium oxide) as deacidification agent. Dry method uses compressed air or Roots blower to atomize air and spray it into flue gas to achieve deacidification. Semi-dry method will be used. The deacidification agent is made into a slurry and then atomized into the flue gas.
另外，垃圾焚烧过程中产生的烟气在进行脱酸处理之后，还要将飞灰收进行集后并加入螯合剂进行螯合处理，目前的处理方法是，需要在垃圾焚烧发电厂飞灰收集仓后设置一整套飞灰螯合处理设备，包含飞灰储仓、称重设备、搅拌设备、打包设备，装车设备等，用于飞灰的螯合处理。费用上除螯合剂费用外，还要额外加上每吨100-200元的设备运营、人工、水电、检修、打包等费用。处理完后，飞灰螯合物还需养护3-5天后才能出厂。需要占用较大的暂存空间，并耗费大量的二次倒运装车运输工作量。In addition, after the flue gas generated in the waste incineration process is subjected to deacidification treatment, the fly ash is collected and chelating agent is added for chelation treatment. The current treatment method is to collect fly ash in the waste incineration power plant. A set of fly ash chelation processing equipment is set up behind the warehouse, including fly ash storage bins, weighing equipment, mixing equipment, packing equipment, loading equipment, etc., for the chelation treatment of fly ash. In addition to the cost of the chelating agent, the cost of equipment operation, labor, water and electricity, overhaul, packaging, etc. of 100-200 yuan per ton is added. After the treatment, the fly ash chelate needs to be cured for 3-5 days before it leaves the factory. It requires a large amount of temporary storage space and consumes a large amount of secondary reverse loading and transportation workload.
因此，现有技术中，生活垃圾焚烧发电厂的飞灰的螯合处理是在脱酸处理之后的另一个工序，而且这个工序需要一系列专用的设备设施，给垃圾焚烧厂的运营带来很大的运营成本。Therefore, in the prior art, the chelation treatment of the fly ash of the domestic waste incineration power plant is another process after the deacidification treatment, and this process requires a series of special equipment and facilities, which brings the operation of the garbage incineration plant very much. Large operating costs.
发明内容Summary of the invention
为了解决上述问题，本发明提出一种垃圾焚烧飞灰的喷射螯合处理方法，本方法主要内容是利用脱酸系统将固体粉末飞灰螯合剂直接喷入烟气中，使螯合剂直接与烟气粉末混合，从而使烟气中的飞灰完成螯合过程，在后续对垃圾焚烧飞灰进行收集之后，飞灰已经达到GB16889-2008要求，本发明利用脱酸系统将螯合剂喷射到烟气中对烟气进行单独螯合，也可以利用脱酸系统将同时具有螯合和脱酸功能的粉剂喷射到烟气中对烟气同时进行脱酸及螯合处理，可以减少工艺流程，节省设备占用的空间，有效地降低运营费用。In order to solve the above problems, the present invention provides a jet chelation treatment method for waste incineration fly ash. The main content of the method is to directly spray a solid powder fly ash chelating agent into the flue gas by using a deacidification system, so that the chelating agent directly interacts with the smoke. The gas powder is mixed so that the fly ash in the flue gas completes the chelation process. After the subsequent collection of the waste incineration fly ash, the fly ash has reached the requirements of GB16889-2008, and the present invention utilizes the deacidification system to spray the chelating agent to the flue gas. In the case of separate chelation of the flue gas, the deacidification system can also be used to spray the powder having both chelation and deacidification functions into the flue gas to simultaneously deacidify and chelate the flue gas, thereby reducing the process flow and saving equipment. Take up space and effectively reduce operating expenses.
本发明解决其技术问题所采用的技术方案是：本发明提出一种垃圾焚烧飞灰的喷射螯合处理方法，其特征是，利用脱酸系统将固体粉末飞灰螯合剂直接喷入烟气中，使螯合剂直接与烟气粉末混合，从而使烟气中的飞灰完成螯合过程，其包括以下步骤：The technical solution adopted by the present invention to solve the technical problem is that the present invention provides a jet chelation treatment method for waste incineration fly ash, which is characterized in that a solid powder fly ash chelating agent is directly sprayed into the flue gas by using a deacidification system. The chelating agent is directly mixed with the flue gas powder, so that the fly ash in the flue gas completes the chelation process, which comprises the following steps:
第1步、将粉末状飞灰螯合剂装入料仓；In the first step, the powdered fly ash chelating agent is charged into the silo;
第2步、进入料仓底部的计量装置进行计量；In the second step, the metering device entering the bottom of the silo is metered;
第3步、利用脱酸系喷射装置将飞灰螯合剂喷入烟道；In the third step, the fly ash chelating agent is sprayed into the flue by using a deacidification spraying device;
第4步、通过飞灰收集和输送系统收集飞灰，加湿后打包或直接装车运走。In the fourth step, the fly ash is collected by the fly ash collection and conveying system, packaged after humidification or directly loaded and transported.
本发明的有益效果：本发明利用脱酸系统将螯合剂喷射到烟气中对烟气进行单独螯合，也可以利用
脱酸系统将同时具有螯合和脱酸功能的粉剂喷射到烟气中对烟气同时进行脱酸及螯合处理，可以减少工艺流程，节省设备占用的空间，有效地降低运营费用。Advantageous Effects of the Invention: The present invention utilizes a deacidification system to spray a chelating agent into a flue gas to separately chelate the flue gas, and may also utilize
The deacidification system sprays the powder with both chelation and deacidification functions into the flue gas to simultaneously deacidify and chelate the flue gas, which can reduce the process flow, save space occupied by equipment, and effectively reduce operating costs.
本发明具体实施例1。一种垃圾焚烧飞灰的喷射螯合处理方法，其特征是，利用干法脱酸系统将固体粉末飞灰螯合剂直接喷入烟气中，使螯合剂直接与烟气粉末混合，从而使烟气中的飞灰完成螯合过程，其包括以下步骤：Specific Example 1 of the present invention. A jet chelation treatment method for waste incineration fly ash, characterized in that a solid powder fly ash chelating agent is directly sprayed into the flue gas by a dry deacidification system, so that the chelating agent is directly mixed with the flue gas powder, thereby making the smoke The fly ash in the gas completes the chelation process, which includes the following steps:
1、将粉末状飞灰螯合剂装入料仓；1. Loading the powdered fly ash chelating agent into the silo;
2、通过料仓底部的计量装置进行计量；2. Metering by means of a metering device at the bottom of the silo;
3、飞灰螯合剂利用干粉喷射装置喷入烟道，可以独立喷入，也可以与其他粉末耗材如干法脱酸剂、活性炭等一起喷入；3. The fly ash chelating agent is sprayed into the flue by a dry powder spraying device, and can be sprayed independently, or can be sprayed together with other powder consumables such as dry deacidification agent and activated carbon;
4、通过飞灰收集和输送系统收集飞灰，加湿后打包或直接装车运走。4. Collect fly ash through fly ash collection and conveying system, pack it after humidification or directly load it.
本发明具体实施例2。一种垃圾焚烧飞灰的喷射螯合处理方法，其特征是，利用半干法脱酸系统将固体粉末飞灰螯合剂直接喷入烟气中，使螯合剂直接与烟气粉末混合，从而使烟气中的飞灰完成螯合过程，其包括以下步骤：Specific Example 2 of the present invention. A jet chelation treatment method for waste incineration fly ash, characterized in that a solid powder fly ash chelating agent is directly sprayed into the flue gas by a semi-dry deacidification system, so that the chelating agent is directly mixed with the flue gas powder, thereby The fly ash in the flue gas completes the chelation process, which includes the following steps:
1、将粉末状飞灰螯合剂装入料仓；1. Loading the powdered fly ash chelating agent into the silo;
2、进入半干法脱酸系统的浆液制备装置制成浆液；2. The slurry preparation device entering the semi-dry deacidification system is made into a slurry;
3、利用浆液喷射系统，雾化后喷入烟气中；3, using the slurry injection system, sprayed into the flue gas after atomization;
4、通过飞灰收集和输送系统收集飞灰，加湿后打包或直接装车运走。4. Collect fly ash through fly ash collection and conveying system, pack it after humidification or directly load it.
在本发明提出的以上两个实施例中，可以利用脱酸系统将螯合剂喷射到烟气中对烟气进行单独螯合，也可以利用脱酸系统将同时具有螯合和脱酸功能的粉剂喷射到烟气中对烟气同时进行脱酸及螯合处理，可以减少工艺流程，节省设备占用的空间，有效地降低运营费用。
In the above two embodiments proposed by the present invention, the chelating agent may be sprayed into the flue gas by means of a deacidification system to separate the flue gas separately, or the deacidification system may be used to simultaneously have a chelate and deacidification function. Simultaneous deacidification and sequestration of the flue gas into the flue gas can reduce the process flow, save space occupied by equipment, and effectively reduce operating costs.
Claims (1)
- 一种垃圾焚烧飞灰的喷射螯合处理方法，其特征是，利用脱酸系统将固体粉末飞灰螯合剂直接喷入烟气中，使螯合剂直接与烟气粉末混合，从而使烟气中的飞灰完成螯合过程，其包括以下步骤：A jet chelation treatment method for waste incineration fly ash, characterized in that a solid powder fly ash chelating agent is directly sprayed into the flue gas by using a deacidification system, so that the chelating agent is directly mixed with the flue gas powder, thereby making the flue gas The fly ash completes the chelation process and includes the following steps:第1步、将粉末状飞灰螯合剂装入料仓；In the first step, the powdered fly ash chelating agent is charged into the silo;第2步、进入料仓底部的计量装置进行计量；In the second step, the metering device entering the bottom of the silo is metered;第3步、利用脱酸系喷射装置将飞灰螯合剂喷入烟道；In the third step, the fly ash chelating agent is sprayed into the flue by using a deacidification spraying device;第4步、通过飞灰收集和输送系统收集飞灰，加湿后打包或直接装车运走。 In the fourth step, the fly ash is collected by the fly ash collection and conveying system, packaged after humidification or directly loaded and transported.
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| PCT/CN2017/071986 WO2018133047A1 (en) | 2017-01-20 | 2017-01-20 | Injection chelating treatment method for waste incineration fly ash |
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| CN104258709A (en) * | 2014-09-26 | 2015-01-07 | 成都中环资(集团)有限公司 | Waste derived fuel burning smoke separation and purifying process |
| CN105968349A (en) * | 2016-05-27 | 2016-09-28 | 上海京尔环保科技有限公司 | Chelating agent for waste incineration and application thereof |
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