CN105903326A - A kind of biomass ash desulfurization process - Google Patents
A kind of biomass ash desulfurization process Download PDFInfo
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- CN105903326A CN105903326A CN201610414887.8A CN201610414887A CN105903326A CN 105903326 A CN105903326 A CN 105903326A CN 201610414887 A CN201610414887 A CN 201610414887A CN 105903326 A CN105903326 A CN 105903326A
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- 238000006477 desulfuration reaction Methods 0.000 title claims abstract description 110
- 230000023556 desulfurization Effects 0.000 title claims abstract description 110
- 239000002028 Biomass Substances 0.000 title claims abstract description 49
- 238000000034 method Methods 0.000 title claims abstract description 22
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 118
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims abstract description 49
- 239000003546 flue gas Substances 0.000 claims abstract description 49
- RAHZWNYVWXNFOC-UHFFFAOYSA-N Sulphur dioxide Chemical compound O=S=O RAHZWNYVWXNFOC-UHFFFAOYSA-N 0.000 claims abstract description 28
- 239000002245 particle Substances 0.000 claims abstract description 9
- 239000007788 liquid Substances 0.000 claims abstract description 6
- 238000001556 precipitation Methods 0.000 claims abstract description 6
- 239000002351 wastewater Substances 0.000 claims abstract description 6
- 230000003009 desulfurizing effect Effects 0.000 claims abstract 3
- 239000007921 spray Substances 0.000 claims description 10
- 238000000354 decomposition reaction Methods 0.000 claims description 9
- 238000006243 chemical reaction Methods 0.000 claims description 6
- 238000005516 engineering process Methods 0.000 claims description 6
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 claims 6
- 229910052717 sulfur Inorganic materials 0.000 claims 6
- 239000011593 sulfur Substances 0.000 claims 6
- 238000000605 extraction Methods 0.000 claims 2
- 238000011049 filling Methods 0.000 claims 2
- 239000000779 smoke Substances 0.000 claims 2
- 239000003518 caustics Substances 0.000 claims 1
- 230000000694 effects Effects 0.000 claims 1
- 238000002156 mixing Methods 0.000 claims 1
- 230000003020 moisturizing effect Effects 0.000 claims 1
- 239000002893 slag Substances 0.000 abstract description 15
- 238000002485 combustion reaction Methods 0.000 abstract description 13
- 238000006386 neutralization reaction Methods 0.000 abstract description 3
- 238000005086 pumping Methods 0.000 abstract 5
- 238000005507 spraying Methods 0.000 abstract 2
- 238000007599 discharging Methods 0.000 abstract 1
- 239000002956 ash Substances 0.000 description 34
- 239000003595 mist Substances 0.000 description 8
- 239000000126 substance Substances 0.000 description 8
- 230000018044 dehydration Effects 0.000 description 7
- 238000006297 dehydration reaction Methods 0.000 description 7
- 238000010521 absorption reaction Methods 0.000 description 4
- 238000005189 flocculation Methods 0.000 description 4
- 230000016615 flocculation Effects 0.000 description 4
- 230000000630 rising effect Effects 0.000 description 4
- 238000005406 washing Methods 0.000 description 4
- 230000003203 everyday effect Effects 0.000 description 3
- 229910052602 gypsum Inorganic materials 0.000 description 3
- 239000010440 gypsum Substances 0.000 description 3
- 239000003513 alkali Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 239000000446 fuel Substances 0.000 description 2
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 1
- 239000010884 boiler slag Substances 0.000 description 1
- 239000000498 cooling water Substances 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 230000012010 growth Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000008636 plant growth process Effects 0.000 description 1
- 239000002910 solid waste Substances 0.000 description 1
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- 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
- B01D53/46—Removing components of defined structure
- B01D53/48—Sulfur compounds
- B01D53/50—Sulfur oxides
- B01D53/501—Sulfur oxides by treating the gases with a solution or a suspension of an alkali or earth-alkali or ammonium compound
- B01D53/502—Sulfur oxides by treating the gases with a solution or a suspension of an alkali or earth-alkali or ammonium compound characterised by a specific solution or suspension
-
- 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
- B01D53/46—Removing components of defined structure
- B01D53/48—Sulfur compounds
- B01D53/50—Sulfur oxides
- B01D53/501—Sulfur oxides by treating the gases with a solution or a suspension of an alkali or earth-alkali or ammonium compound
- B01D53/504—Sulfur oxides by treating the gases with a solution or a suspension of an alkali or earth-alkali or ammonium compound characterised by a specific device
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- Health & Medical Sciences (AREA)
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- Environmental & Geological Engineering (AREA)
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- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Treating Waste Gases (AREA)
Abstract
Description
技术领域technical field
本发明涉及脱硫工艺技术领域，尤其涉及一种生物质灰脱硫工艺。The invention relates to the technical field of desulfurization process, in particular to a biomass ash desulfurization process.
背景技术Background technique
现有的技术是大多采用湿法脱硫—石灰-石膏法来脱硫，湿法脱硫—石灰-石膏法脱硫需要的成本高，石灰—石膏法脱硫会产生大量的固体废弃物，固体废弃物处理不当易产生环境污染。经过生物质锅炉出渣机的冷却水经过加温后会有氨气析出，若直接排放会对环境造成污染。Most of the existing technologies use wet desulfurization-lime-gypsum method for desulfurization. The cost of wet desulfurization-lime-gypsum desulfurization is high, and lime-gypsum desulfurization will generate a large amount of solid waste, which is not properly disposed of. It is easy to cause environmental pollution. After the cooling water passing through the biomass boiler slag extractor is heated, ammonia gas will be precipitated. If it is discharged directly, it will pollute the environment.
因此，急需提供一种生物质灰脱硫工艺，以解决现有技术的不足。Therefore, it is urgent to provide a biomass ash desulfurization process to solve the deficiencies of the prior art.
发明内容Contents of the invention
本发明的目的是提供一种生物质灰脱硫工艺，解决现有脱硫工艺存在的技术问题。The purpose of the present invention is to provide a biomass ash desulfurization process to solve the technical problems existing in the existing desulfurization process.
为实现上述目的，本发明采用如下的技术方案：To achieve the above object, the present invention adopts the following technical solutions:
一种生物质灰脱硫工艺，包括以下步骤：A biomass ash desulfurization process, comprising the following steps:
S1、生物质颗粒进入锅炉1燃烧，完全燃烧后生物质灰通过炉排转动落入出渣机2，脱硫泵5不断抽取脱硫池中的水到出渣机2置换碱性水，碱性水达到设定的液位后通过潜水泵3抽入脱硫池4；S1. Biomass particles enter the boiler 1 for combustion. After complete combustion, the biomass ash falls into the slag machine 2 through the rotation of the grate, and the desulfurization pump 5 continuously pumps the water in the desulfurization pool to the slag machine 2 to replace the alkaline water. After the set liquid level is pumped into the desulfurization tank 4 through the submersible pump 3;
S2、脱硫泵5将脱硫池4中的碱性水抽取到脱硫塔8，通过喷淋装置7喷洒碱性水与烟气反应脱硫，脱硫后的废水排入脱硫池4沉淀；S2. The desulfurization pump 5 pumps the alkaline water in the desulfurization tank 4 to the desulfurization tower 8, sprays the alkaline water through the spray device 7 to react with the flue gas for desulfurization, and discharges the desulfurized wastewater into the desulfurization tank 4 for precipitation;
S3、脱硫泵5不断抽取脱硫池4中的水到出渣机2置换碱性水，置换出的碱性水通过潜水泵3抽入脱硫池4，形成一个循环。S3. The desulfurization pump 5 continuously pumps the water in the desulfurization tank 4 to the slag extractor 2 to replace the alkaline water, and the displaced alkaline water is pumped into the desulfurization tank 4 through the submersible pump 3 to form a cycle.
较优地，所述碱性水中包括水和生物质灰的碱性物质，其中生物质灰的碱性物质溶于水中，所述碱性水的质量浓度介于为0.3％-5％之间。Preferably, the alkaline water includes water and alkaline substances of biomass ash, wherein the alkaline substances of biomass ash are dissolved in water, and the mass concentration of the alkaline water is between 0.3% and 5%. .
较优地，S2中，烟气由脱硫塔8底部进入，在絮流状态下旋转上升，烟气中的二氧化硫与碱性水雾充分接触，发生初级反应，烟气再向上经三级旋流板，在加压喷咀辅助下，烟气中的二氧化硫经过三层旋流板形成的碱性水膜充分混合，烟气在上升过程中，所含介质不断与碱性水帘碰撞混合并吸收分解，经过多次重复的碱性水洗涤，从而达到吸收和分解的作用。Preferably, in S2, the flue gas enters from the bottom of the desulfurization tower 8, and rotates up in the state of flocculation. The sulfur dioxide in the flue gas fully contacts with the alkaline water mist, and the primary reaction occurs, and the flue gas goes upward through the third-stage swirling flow With the help of the pressurized nozzle, the sulfur dioxide in the flue gas is fully mixed through the alkaline water film formed by the three-layer swirl plate. During the rising process of the flue gas, the contained medium continuously collides with the alkaline water curtain and absorbs it. Decomposition, after repeated alkaline water washing, so as to achieve the role of absorption and decomposition.
较优地，脱硫塔8的顶部设有脱水除雾装置。Preferably, a dehydration and mist removal device is installed on the top of the desulfurization tower 8 .
较优地，脱硫池4连接补水管6，通过补水管6给脱硫池4补水。Preferably, the desulfurization tank 4 is connected to the water supply pipe 6, and the desulfurization tank 4 is supplied with water through the water supply pipe 6.
本发明的生物质灰脱硫工艺具有以下有益效果：使用生物质颗粒燃烧后的灰来脱硫，烟气中的二氧化硫与碱性水充分接触、吸收，溶解在碱性水中，与碱性水进行酸碱中和反应，处理后的烟气达到排放标准，节约了企业运行的成本。The biomass ash desulfurization process of the present invention has the following beneficial effects: the ash after biomass particle combustion is used for desulfurization, the sulfur dioxide in the flue gas is fully contacted and absorbed with alkaline water, dissolved in alkaline water, and acidified with alkaline water. Alkali neutralization reaction, the treated flue gas meets the emission standard, which saves the cost of enterprise operation.
附图说明Description of drawings
图1是本发明的一种生物质灰脱硫工艺的流程图。Fig. 1 is a flow chart of a biomass ash desulfurization process of the present invention.
具体实施方式detailed description
下面结合实施例对本发明作进一步的说明，这是本发明的较佳实施例。The present invention will be further described below in conjunction with the examples, which are preferred embodiments of the present invention.
实施例1Example 1
如图1所示，一种生物质灰脱硫工艺，包括以下步骤：As shown in Figure 1, a biomass ash desulfurization process comprises the following steps:
S1、生物质颗粒进入锅炉1燃烧，完全燃烧后生物质灰通过炉排转动落入出渣机2，脱硫泵5不断抽取脱硫池中的水到出渣机2置换碱性水，碱性水达到设定的液位后通过潜水泵3抽入脱硫池4；S1. Biomass particles enter the boiler 1 for combustion. After complete combustion, the biomass ash falls into the slag machine 2 through the rotation of the grate, and the desulfurization pump 5 continuously pumps the water in the desulfurization pool to the slag machine 2 to replace the alkaline water. After the set liquid level is pumped into the desulfurization tank 4 through the submersible pump 3;
S2、脱硫泵5将脱硫池4中的碱性水抽取到脱硫塔8，通过喷淋装置7喷洒碱性水与烟气反应脱硫，脱硫后的废水排入脱硫池4沉淀；S2. The desulfurization pump 5 pumps the alkaline water in the desulfurization tank 4 to the desulfurization tower 8, sprays the alkaline water through the spray device 7 to react with the flue gas for desulfurization, and discharges the desulfurized wastewater into the desulfurization tank 4 for precipitation;
S3、脱硫泵5不断抽取脱硫池4中的水到出渣机2置换碱性水，置换出的碱性水通过潜水泵3抽入脱硫池4，形成一个循环。S3. The desulfurization pump 5 continuously pumps the water in the desulfurization tank 4 to the slag extractor 2 to replace the alkaline water, and the displaced alkaline water is pumped into the desulfurization tank 4 through the submersible pump 3 to form a cycle.
较优地，所述碱性水中包括水和生物质灰的碱性物质，其中生物质灰的碱性物质溶于水中，所述碱性水的质量浓度为0.3％，100kg生物质灰，可以处理约200000m3的烟气量。不同的生物质中，其无机物组成不尽相同，这与该生物质的生长环境、生理特点有很大关系，生物质中的灰分有两种来源：一是燃料本身固有的，即形成于植物生长过程中本身固有的灰分是相对均匀地分布在燃料中，其中Si、K、Na、Ca、Mg、Fe是生物质灰的主要元素，另一种是加工过程中带入的，上述生物质灰中的金属元素溶于水中，形成碱性水。Preferably, the alkaline water includes alkaline substances of water and biomass ash, wherein the alkaline substances of biomass ash are dissolved in water, and the mass concentration of the alkaline water is 0.3%. 100kg of biomass ash can be Treat about 200,000m 3 of flue gas. In different biomass, the composition of inorganic matter is not the same, which has a lot to do with the growth environment and physiological characteristics of the biomass. There are two sources of ash in biomass: one is inherent in the fuel itself, that is, it is formed in The inherent ash content in the plant growth process is relatively evenly distributed in the fuel, among which Si, K, Na, Ca, Mg, and Fe are the main elements of biomass ash, and the other is brought in during the processing. The metal elements in the material ash dissolve in water to form alkaline water.
较优地，S2中，烟气由脱硫塔8底部进入，在絮流状态下旋转上升，烟气中的二氧化硫与碱性水雾充分接触，发生初级反应，烟气再向上经三级旋流板，在加压喷咀辅助下，烟气中的二氧化硫经过三层旋流板形成的碱性水膜充分混合，烟气在上升过程中，所含介质不断与碱性水帘碰撞混合并吸收分解，经过多次重复的碱性水洗涤，从而达到吸收和分解的作用。Preferably, in S2, the flue gas enters from the bottom of the desulfurization tower 8, and rotates up in the state of flocculation. The sulfur dioxide in the flue gas fully contacts with the alkaline water mist, and the primary reaction occurs, and the flue gas goes upward through the third-stage swirling flow With the help of the pressurized nozzle, the sulfur dioxide in the flue gas is fully mixed through the alkaline water film formed by the three-layer swirl plate. During the rising process of the flue gas, the contained medium continuously collides with the alkaline water curtain and absorbs it. Decomposition, after repeated alkaline water washing, so as to achieve the role of absorption and decomposition.
较优地，脱硫塔8的顶部设有脱水除雾装置。通过脱水除雾装置将处理后的烟气进行脱水后再排放，进一步净化烟气，达到相应的排放等级。Preferably, a dehydration and mist removal device is installed on the top of the desulfurization tower 8 . The treated flue gas is dehydrated by the dehydration and demisting device before being discharged to further purify the flue gas to reach the corresponding emission level.
较优地，脱硫池4连接补水管6，通过补水管6给脱硫池4补水。碱性水在脱硫塔8中的高温烟气蒸发和部分随着灰渣带出，每天需补水，补水从水管6进入脱硫池4。Preferably, the desulfurization tank 4 is connected to the water supply pipe 6, and the desulfurization tank 4 is supplied with water through the water supply pipe 6. The high-temperature flue gas of the alkaline water in the desulfurization tower 8 evaporates and is partly taken out with the ash, and water needs to be replenished every day, and the replenishment water enters the desulfurization tank 4 from the water pipe 6 .
实施例2Example 2
如图1所示，一种生物质灰脱硫工艺，包括以下步骤：As shown in Figure 1, a biomass ash desulfurization process comprises the following steps:
S1、生物质颗粒进入锅炉1燃烧，完全燃烧后生物质灰通过炉排转动落入出渣机2，脱硫泵5不断抽取脱硫池中的水到出渣机2置换碱性水，碱性水达到设定的液位后通过潜水泵3抽入脱硫池4；S1. Biomass particles enter the boiler 1 for combustion. After complete combustion, the biomass ash falls into the slag machine 2 through the rotation of the grate, and the desulfurization pump 5 continuously pumps the water in the desulfurization pool to the slag machine 2 to replace the alkaline water. After the set liquid level is pumped into the desulfurization tank 4 through the submersible pump 3;
S2、脱硫泵5将脱硫池4中的碱性水抽取到脱硫塔8，通过喷淋装置7喷洒碱性水与烟气反应脱硫，脱硫后的废水排入脱硫池4沉淀；S2. The desulfurization pump 5 pumps the alkaline water in the desulfurization tank 4 to the desulfurization tower 8, sprays the alkaline water through the spray device 7 to react with the flue gas for desulfurization, and discharges the desulfurized wastewater into the desulfurization tank 4 for precipitation;
S3、脱硫泵5不断抽取脱硫池4中的水到出渣机2置换碱性水，置换出的碱性水通过潜水泵3抽入脱硫池4，形成一个循环。S3. The desulfurization pump 5 continuously pumps the water in the desulfurization tank 4 to the slag extractor 2 to replace the alkaline water, and the displaced alkaline water is pumped into the desulfurization tank 4 through the submersible pump 3 to form a cycle.
较优地，所述碱性水中包括水和生物质灰的碱性物质，其中生物质灰的碱性物质溶于水中，所述碱性水的质量浓度为1％，100kg生物质灰，可以处理约200000m3的烟气量。Preferably, the alkaline water includes alkaline substances of water and biomass ash, wherein the alkaline substances of biomass ash are dissolved in water, and the mass concentration of the alkaline water is 1%. 100kg of biomass ash can be Treat about 200,000m 3 of flue gas.
较优地，S2中，烟气由脱硫塔8底部进入，在絮流状态下旋转上升，烟气中的二氧化硫与碱性水雾充分接触，发生初级反应，烟气再向上经三级旋流板，在加压喷咀辅助下，烟气中的二氧化硫经过三层旋流板形成的碱性水膜充分混合，烟气在上升过程中，所含介质不断与碱性水帘碰撞混合并吸收分解，经过多次重复的碱性水洗涤，从而达到吸收和分解的作用。Preferably, in S2, the flue gas enters from the bottom of the desulfurization tower 8, and rotates up in the state of flocculation. The sulfur dioxide in the flue gas fully contacts with the alkaline water mist, and the primary reaction occurs, and the flue gas goes upward through the third-stage swirling flow With the help of the pressurized nozzle, the sulfur dioxide in the flue gas is fully mixed through the alkaline water film formed by the three-layer swirl plate. During the rising process of the flue gas, the contained medium continuously collides with the alkaline water curtain and absorbs it. Decomposition, after repeated alkaline water washing, so as to achieve the role of absorption and decomposition.
较优地，脱硫塔8的顶部设有脱水除雾装置。通过脱水除雾装置将处理后的烟气进行脱水后再排放，进一步净化烟气，达到相应的排放等级。Preferably, a dehydration and mist removal device is installed on the top of the desulfurization tower 8 . The treated flue gas is dehydrated by the dehydration and demisting device before being discharged to further purify the flue gas to reach the corresponding emission level.
较优地，脱硫池4连接补水管6，通过补水管6给脱硫池4补水。碱性水在脱硫塔8中的高温烟气蒸发和部分随着灰渣带出，每天需补水，补水从水管6进入脱硫池4。Preferably, the desulfurization tank 4 is connected to the water supply pipe 6, and the desulfurization tank 4 is supplied with water through the water supply pipe 6. The high-temperature flue gas of the alkaline water in the desulfurization tower 8 is evaporated and partly carried out with the ash, and water needs to be replenished every day, and the replenishment water enters the desulfurization tank 4 from the water pipe 6 .
实施例3Example 3
如图1所示，一种生物质灰脱硫工艺，包括以下步骤：As shown in Figure 1, a biomass ash desulfurization process comprises the following steps:
S1、生物质颗粒进入锅炉1燃烧，完全燃烧后生物质灰通过炉排转动落入出渣机2，脱硫泵5不断抽取脱硫池中的水到出渣机2置换碱性水，碱性水达到设定的液位后通过潜水泵3抽入脱硫池4；S1. Biomass particles enter the boiler 1 for combustion. After complete combustion, the biomass ash falls into the slag machine 2 through the rotation of the grate, and the desulfurization pump 5 continuously pumps the water in the desulfurization pool to the slag machine 2 to replace the alkaline water. After the set liquid level is pumped into the desulfurization tank 4 through the submersible pump 3;
S2、脱硫泵5将脱硫池4中的碱性水抽取到脱硫塔8，通过喷淋装置7喷洒碱性水与烟气反应脱硫，脱硫后的废水排入脱硫池4沉淀；S2. The desulfurization pump 5 pumps the alkaline water in the desulfurization tank 4 to the desulfurization tower 8, sprays the alkaline water through the spray device 7 to react with the flue gas for desulfurization, and discharges the desulfurized wastewater into the desulfurization tank 4 for precipitation;
S3、脱硫泵5不断抽取脱硫池4中的水到出渣机2置换碱性水，置换出的碱性水通过潜水泵3抽入脱硫池4，形成一个循环。S3. The desulfurization pump 5 continuously pumps the water in the desulfurization tank 4 to the slag extractor 2 to replace the alkaline water, and the displaced alkaline water is pumped into the desulfurization tank 4 through the submersible pump 3 to form a cycle.
较优地，所述碱性水中包括水和生物质灰的碱性物质，其中生物质灰的碱性物质溶于水中，所述碱性水的质量浓度为5％，100kg生物质灰，可以处理约200000m3的烟气量。Preferably, the alkaline water includes alkaline substances of water and biomass ash, wherein the alkaline substances of biomass ash are dissolved in water, and the mass concentration of the alkaline water is 5%. 100kg of biomass ash can be Treat about 200,000m 3 of flue gas.
较优地，S2中，烟气由脱硫塔8底部进入，在絮流状态下旋转上升，烟气中的二氧化硫与碱性水雾充分接触，发生初级反应，烟气再向上经三级旋流板，在加压喷咀辅助下，烟气中的二氧化硫经过三层旋流板形成的碱性水膜充分混合，烟气在上升过程中，所含介质不断与碱性水帘碰撞混合并吸收分解，经过多次重复的碱性水洗涤，从而达到吸收和分解的作用。Preferably, in S2, the flue gas enters from the bottom of the desulfurization tower 8, and rotates up in the state of flocculation. The sulfur dioxide in the flue gas fully contacts with the alkaline water mist, and the primary reaction occurs, and the flue gas goes upward through the third-stage swirling flow With the help of the pressurized nozzle, the sulfur dioxide in the flue gas is fully mixed through the alkaline water film formed by the three-layer swirl plate. During the rising process of the flue gas, the contained medium continuously collides with the alkaline water curtain and absorbs it. Decomposition, after repeated alkaline water washing, so as to achieve the role of absorption and decomposition.
较优地，脱硫塔8的顶部设有脱水除雾装置。通过脱水除雾装置将处理后的烟气进行脱水后再排放，进一步净化烟气，达到相应的排放等级。Preferably, a dehydration and mist removal device is installed on the top of the desulfurization tower 8 . The treated flue gas is dehydrated by the dehydration and demisting device before being discharged to further purify the flue gas to reach the corresponding emission level.
较优地，脱硫池4连接补水管6，通过补水管6给脱硫池4补水。碱性水在脱硫塔8中的高温烟气蒸发和部分随着灰渣带出，每天需补水，补水从水管6进入脱硫池4。Preferably, the desulfurization tank 4 is connected to the water supply pipe 6, and the desulfurization tank 4 is supplied with water through the water supply pipe 6. The high-temperature flue gas of the alkaline water in the desulfurization tower 8 is evaporated and partly carried out with the ash, and water needs to be replenished every day, and the replenishment water enters the desulfurization tank 4 from the water pipe 6 .
本发明的生物质灰脱硫工艺具有以下有益效果：使用生物质颗粒燃烧后的灰来脱硫，烟气中的二氧化硫与碱性水充分接触、吸收，溶解在碱性水中，与碱性水进行酸碱中和反应，处理后的烟气达到排放标准，节约了企业运行的成本。The biomass ash desulfurization process of the present invention has the following beneficial effects: the ash after biomass particle combustion is used for desulfurization, the sulfur dioxide in the flue gas is fully contacted and absorbed with alkaline water, dissolved in alkaline water, and acidified with alkaline water. Alkali neutralization reaction, the treated flue gas meets the emission standard, which saves the cost of enterprise operation.
最后应当说明的是，以上实施例仅用以说明本发明的技术方案，而非对本发明保护范围的限制，尽管参照较佳实施例对本发明作了详细地说明，本领域的普通技术人员应当理解，可以对本发明的技术方案进行修改或者等同替换，而不脱离本发明技术方案的实质和范围。Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than limiting the protection scope of the present invention, although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand , the technical solution of the present invention may be modified or equivalently replaced without departing from the spirit and scope of the technical solution of the present invention.
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