CN221370918U - Flue gas desulfurization denitration wastewater treatment system - Google Patents
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- 238000006477 desulfuration reaction Methods 0.000 title claims abstract description 38
- 230000023556 desulfurization Effects 0.000 title claims abstract description 38
- 238000004065 wastewater treatment Methods 0.000 title claims abstract description 22
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 title claims abstract description 17
- 239000003546 flue gas Substances 0.000 title claims abstract description 17
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 47
- 239000002351 wastewater Substances 0.000 claims abstract description 38
- 239000003513 alkali Substances 0.000 claims abstract description 31
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- 239000007789 gas Substances 0.000 claims abstract description 7
- 239000012528 membrane Substances 0.000 claims description 21
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- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 abstract description 14
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- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 4
- TWRXJAOTZQYOKJ-UHFFFAOYSA-L Magnesium chloride Chemical compound [Mg+2].[Cl-].[Cl-] TWRXJAOTZQYOKJ-UHFFFAOYSA-L 0.000 description 4
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- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 2
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 description 2
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 2
- VSCWAEJMTAWNJL-UHFFFAOYSA-K aluminium trichloride Chemical compound Cl[Al](Cl)Cl VSCWAEJMTAWNJL-UHFFFAOYSA-K 0.000 description 2
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- 102100026388 L-amino-acid oxidase Human genes 0.000 description 1
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 description 1
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 1
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- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 description 1
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Abstract
Description
技术领域Technical Field
本实用新型涉及废水处理设备技术领域，特别涉及一种烟气脱硫脱硝废水处理系统。The utility model relates to the technical field of wastewater treatment equipment, in particular to a flue gas desulfurization and denitrification wastewater treatment system.
背景技术Background technique
目前，湿法烟气脱硫技术、选择性催化还原法和选择性非催化还原法以其技术成熟、适用范围广、效率高和对机组的适应性好而成为国内外火电厂应用最广泛的脱硫脱硝技术，但该过程中不可避免的会有脱硫脱硝废水排出。电厂脱硫脱硝废水质一般呈酸性(pH为4～6)，含有大量的悬浮物、氨氮等污染物，以及Ca2+、Mg2+、F-、SO4 2-、Cl-、S2-等。如果采用废碱液进行中和，还会带入有机污染物。而且，日常运行中脱硝后逃逸的氨会随烟气进入脱硫吸收塔被洗涤，最终进入脱硫脱硝废水，导致较多电厂脱硫脱硝废水中氨氮超标。但是目前电厂常规的脱硫脱硝废水处理工艺并未考虑对氨氮的去除，导致出水不能满足对氨氮的排放要求。因此亟需分析并掌握电厂脱硫脱硝废水的氨超标现状，进一步针对脱硫脱硝废水水质特点，开发适合脱硫脱硝废水脱氨处理的工艺。At present, wet flue gas desulfurization technology, selective catalytic reduction method and selective non-catalytic reduction method have become the most widely used desulfurization and denitrification technologies in thermal power plants at home and abroad due to their mature technology, wide application range, high efficiency and good adaptability to the unit. However, desulfurization and denitrification wastewater will inevitably be discharged in the process. The desulfurization and denitrification wastewater of power plants is generally acidic (pH 4-6), containing a large amount of suspended matter, ammonia nitrogen and other pollutants, as well as Ca 2+ , Mg 2+ , F - , SO 4 2- , Cl - , S 2- , etc. If waste alkali liquid is used for neutralization, organic pollutants will also be brought in. Moreover, in daily operation, the ammonia escaping after denitrification will enter the desulfurization absorption tower with the flue gas and be washed, and finally enter the desulfurization and denitrification wastewater, resulting in excessive ammonia nitrogen in the desulfurization and denitrification wastewater of many power plants. However, the conventional desulfurization and denitrification wastewater treatment process of power plants currently does not consider the removal of ammonia nitrogen, resulting in the effluent failing to meet the emission requirements for ammonia nitrogen. Therefore, it is urgent to analyze and understand the current situation of excessive ammonia in desulfurization and denitrification wastewater from power plants, and further develop a process suitable for deammoniation treatment of desulfurization and denitrification wastewater based on the water quality characteristics of desulfurization and denitrification wastewater.
目前处理废水中氨氮的方法主要有生物法和物化法。吸附法存在吸附材料用量大、再生频繁等问题；生物法需要补充大量碱度和碳源，且脱硫脱硝废水的高含盐量对微生物的活动和繁殖有抑制作用，运行维护困难，出水容易超标。膜分离法主要利用膜材料的选择透过性实现对污水中不同物质的浓缩，包括正渗透、反渗透和电渗析，其中气态膜分离法氨氮去除效率高、系统集成性高、灵活性强，可以与各种水处理或固废处理工艺耦合，是一种有潜力的脱硫脱硝废水脱氨处理技术。At present, the main methods for treating ammonia nitrogen in wastewater are biological method and physical and chemical method. The adsorption method has problems such as large amount of adsorption materials and frequent regeneration; the biological method requires the addition of a large amount of alkalinity and carbon source, and the high salt content of desulfurization and denitrification wastewater has an inhibitory effect on the activity and reproduction of microorganisms, making operation and maintenance difficult, and the effluent easily exceeds the standard. The membrane separation method mainly uses the selective permeability of membrane materials to achieve the concentration of different substances in sewage, including forward osmosis, reverse osmosis and electrodialysis. Among them, the gaseous membrane separation method has high ammonia nitrogen removal efficiency, high system integration and strong flexibility. It can be coupled with various water treatment or solid waste treatment processes. It is a potential desulfurization and denitrification wastewater deammonification treatment technology.
实用新型内容Utility Model Content
为解决背景技术中提到的技术问题，本实用新型提供了一种结合气态膜分离法使用的烟气脱硫脱硝废水处理系统。In order to solve the technical problems mentioned in the background technology, the utility model provides a flue gas desulfurization and denitrification wastewater treatment system used in combination with a gaseous membrane separation method.
本实用新型采用如下的技术方案：一种烟气脱硫脱硝废水处理系统，包括依次管道连接的调节单元、强化预处理单元和气膜处理单元；废水自调节单元处理流入强化预处理单元后，再流入气膜处理单元中；The utility model adopts the following technical scheme: a flue gas desulfurization and denitrification wastewater treatment system, comprising a regulating unit, an enhanced pretreatment unit and an air film treatment unit connected in sequence by pipelines; after the wastewater is treated in the regulating unit and flows into the enhanced pretreatment unit, it flows into the air film treatment unit;
所述调节单元包括初沉池和水质调节池，废水通过管道引入初沉池后进入水质调节池，且在水质调节池中的停留时间不小于12h；The regulating unit includes a primary sedimentation tank and a water quality regulating tank. The wastewater is introduced into the primary sedimentation tank through a pipeline and then enters the water quality regulating tank, and the residence time in the water quality regulating tank is not less than 12 hours;
所述强化预处理单元包括反应池、混合池、沉淀池和过滤系统；The enhanced pretreatment unit includes a reaction tank, a mixing tank, a sedimentation tank and a filtration system;
所述反应池内设置除硬系统和吸附剂加药系统；废水在所述反应池内的停留时间不低于1h；The reaction tank is provided with a hardness removal system and an adsorbent dosing system; the residence time of wastewater in the reaction tank is not less than 1 hour;
所述混合池内设置混凝加药系统；A coagulation and dosing system is arranged in the mixing tank;
所述除硬系统、吸附剂加药系统和混凝加药系统均设置有加药罐和加药泵；The hardness removal system, adsorbent dosing system and coagulation dosing system are all provided with dosing tanks and dosing pumps;
废水依次经过反应池、混合池、沉淀池后流入过滤系统中处理；Wastewater passes through the reaction tank, mixing tank, and sedimentation tank in sequence before flowing into the filtration system for treatment;
所述气膜处理单元包括加碱系统、气膜系统和加酸系统；The air film treatment unit includes an alkali adding system, an air film system and an acid adding system;
所述加碱系统包括加碱中间罐和碱液存储罐；碱液存储罐的碱液经泵加入加碱中间罐中，使进水pH调节至9～13，所述加碱中间罐的废水经泵流入气膜处理系统；The alkali adding system comprises an alkali adding intermediate tank and an alkali solution storage tank; the alkali solution in the alkali solution storage tank is pumped into the alkali adding intermediate tank to adjust the pH of the inlet water to 9-13, and the wastewater in the alkali adding intermediate tank is pumped into the air film treatment system;
所述气膜系统包括多级气膜组；每级所述气膜组之间连接中间水罐；The air film system comprises a multi-stage air film group; each stage of the air film group is connected with an intermediate water tank;
所述加酸系统为通过泵与各级气膜组连接的酸液存储罐。The acid adding system is an acid liquid storage tank connected to each level of the gas membrane group through a pump.
进一步地，所述沉淀池为斜管沉淀池或高密度沉淀池。Furthermore, the sedimentation tank is an inclined tube sedimentation tank or a high-density sedimentation tank.
进一步地，所述过滤系统包括微滤系统和超滤系统。Furthermore, the filtration system includes a microfiltration system and an ultrafiltration system.
进一步地，所述微滤系统为纤维球过滤器或砂滤过滤器。Furthermore, the microfiltration system is a fiber ball filter or a sand filter.
进一步地，所述气膜处理单元出水端连接氨氮在线分析仪，并通过电磁阀控制出水的流向，当气膜处理单元出水氨氮满足设计要求时，出水直接排放；当气膜处理单元出水氨氮浓度不满足排放要求时，根据超标程度从回流管回流至气膜处理单元内对应级别的气膜组中间水罐中。Furthermore, the water outlet of the air film treatment unit is connected to an ammonia nitrogen online analyzer, and the flow direction of the outlet water is controlled by a solenoid valve. When the ammonia nitrogen concentration in the outlet water of the air film treatment unit meets the design requirements, the outlet water is directly discharged; when the ammonia nitrogen concentration in the outlet water of the air film treatment unit does not meet the discharge requirements, it flows back from the reflux pipe to the intermediate water tank of the air film group of the corresponding level in the air film treatment unit according to the degree of exceeding the standard.
与现有技术相比，本实用新型的优点在于：Compared with the prior art, the advantages of the utility model are:
本实用新型设计的烟气脱硫脱硝废水处理系统，通过设置加碱系统，增加了废水处理液的pH值，使得污水中NH4+的转化为游离的NH3，并跨膜通过加酸系统，被酸吸收液捕获。回收的氨盐具有较高的经济价值，降低了脱硫脱硝废水处理成本。该系统适于处理各种浓度的氨氮废水，且出水水质稳定。减少回收工艺的运行成本，提升回收工艺的效率。The flue gas desulfurization and denitrification wastewater treatment system designed by the utility model increases the pH value of the wastewater treatment liquid by setting up an alkali addition system, so that NH4+ in the sewage is converted into free NH3, and passes through the membrane through the acid addition system and is captured by the acid absorption liquid. The recovered ammonia salt has a high economic value and reduces the cost of desulfurization and denitrification wastewater treatment. The system is suitable for treating ammonia nitrogen wastewater of various concentrations, and the effluent water quality is stable. The operating cost of the recovery process is reduced and the efficiency of the recovery process is improved.
本实用新型设计的烟气脱硫脱硝废水处理系统，通过设置除硬系统，将脱硫脱硝废水中的硅、钙、镁等致垢离子进行去除，避免对气膜系统的不利影响，提高系统稳定运行性能，延长膜系统清洗周期及膜使用寿命。通过投加粉末活性炭等吸附药剂，可有效去除因使用废碱液中和脱硫脱硝废水pH时带入的有机污染物，可以使废水达到直排要求。The flue gas desulfurization and denitrification wastewater treatment system designed by the utility model removes the scale-causing ions such as silicon, calcium, and magnesium in the desulfurization and denitrification wastewater by setting up a hardness removal system, thereby avoiding adverse effects on the gas membrane system, improving the stable operation performance of the system, and extending the membrane system cleaning cycle and membrane service life. By adding adsorbents such as powdered activated carbon, organic pollutants introduced when the pH of the desulfurization and denitrification wastewater is neutralized with waste alkali liquid can be effectively removed, so that the wastewater can meet the direct discharge requirements.
本实用新型设计的自动回流部分，可以有效解决脱硫脱硝废水中氨氮浓度易于波动，且有极高浓度负荷时的稳定运行性能难题。The automatic reflux part designed in the utility model can effectively solve the problem of the easy fluctuation of ammonia nitrogen concentration in the desulfurization and denitrification wastewater and the stable operation performance problem under extremely high concentration load.
附图说明BRIEF DESCRIPTION OF THE DRAWINGS
图1为本实用新型烟气脱硫脱硝废水处理系统的整体结构示意图。FIG1 is a schematic diagram of the overall structure of a flue gas desulfurization and denitrification wastewater treatment system according to the present invention.
其中：in:
1-初沉池、2-调节池、3-反应池、4-除硬系统、5-吸附剂加药系统、6-混合池，7-混凝加药系统、8-沉淀池、9-过滤系统、10-加碱中间罐、11-碱液存储罐、12-一级气膜系统、13-一级加酸系统、14-1号中间水罐、15-二级气膜系统、16-二级加酸系统、17-2号中间水罐、18-三级气膜系统、19-三级加酸系统、20-氨氮在线分析仪、21-电磁出水控制阀、22-回流管。1-primary sedimentation tank, 2-equalization tank, 3-reaction tank, 4-hardness removal system, 5-adsorbent dosing system, 6-mixing tank, 7-coagulation dosing system, 8-sedimentation tank, 9-filtration system, 10-alkali dosing intermediate tank, 11-alkali solution storage tank, 12-first-level air film system, 13-first-level acid dosing system, 14-No. 1 intermediate water tank, 15-secondary air film system, 16-secondary acid dosing system, 17-No. 2 intermediate water tank, 18-third-level air film system, 19-third-level acid dosing system, 20-ammonia nitrogen online analyzer, 21-electromagnetic water outlet control valve, 22-reflux pipe.
具体实施方式Detailed ways
以下，为了便于本领域技术人员理解本实用新型技术方案，现参照附图来做进一步说明。应该理解，这些描述只是示例性的，而并非要限制本实用新型的范围。In order to facilitate those skilled in the art to understand the technical solution of the utility model, further description is now made with reference to the accompanying drawings. It should be understood that these descriptions are only exemplary and are not intended to limit the scope of the utility model.
在下面的详细描述中，为便于解释，阐述了许多具体的细节以提供对本实用新型实施例的全面理解。然而，明显地，一个或多个实施例在没有这些具体细节的情况下也可以被实施。此外，在以下说明中，省略了对公知结构和技术的描述，以避免不必要地混淆本实用新型的概念。In the following detailed description, for ease of explanation, many specific details are set forth to provide a comprehensive understanding of the embodiments of the present invention. However, it is apparent that one or more embodiments may be implemented without these specific details. In addition, in the following description, descriptions of known structures and technologies are omitted to avoid unnecessary confusion of the concepts of the present invention.
请参照图1，为本实用新型烟气脱硫脱硝废水处理系统的整体结构示意图，包括调节单元、强化预处理单元、气膜处理单元。所述调节单元包括通过管道将废水排放车间产生的废水引入初沉淀池1，随后进入水质调节池2。调节单元中水质调节池的停留时间不小于12h。Please refer to Figure 1, which is a schematic diagram of the overall structure of the flue gas desulfurization and denitrification wastewater treatment system of the utility model, including a regulating unit, an enhanced pretreatment unit, and an air film treatment unit. The regulating unit includes introducing the wastewater generated by the wastewater discharge workshop into the primary sedimentation tank 1 through a pipeline, and then entering the water quality regulating tank 2. The residence time of the water quality regulating tank in the regulating unit is not less than 12 hours.
所述强化预处理单元包括反应池3，混合池6和沉淀池8，在反应池3依次经除硬系统4加入除硬药剂、吸附剂加药系统5加入吸附药剂。接着，废水进入混合池6，经混凝加药系统7加入絮凝剂。其中，The enhanced pretreatment unit includes a reaction tank 3, a mixing tank 6 and a sedimentation tank 8. In the reaction tank 3, a hardness removal agent is added through a hardness removal system 4 and an adsorbent is added through an adsorbent dosing system 5. Then, the wastewater enters the mixing tank 6 and a flocculant is added through a coagulation dosing system 7.
除硬系统4可添加多种药剂，包括氢氧化钠、氯化镁、碳酸钠等，可去除硅、钙、镁等致垢离子，在具体加入药剂时，氢氧化钠和氯化镁的加药口应位于碳酸钠加药口前，确保先去除水中的硅，随后再去除水中的钙和镁。The hardness removal system 4 can add a variety of reagents, including sodium hydroxide, magnesium chloride, sodium carbonate, etc., which can remove scale-causing ions such as silicon, calcium, and magnesium. When adding the reagents, the dosing ports for sodium hydroxide and magnesium chloride should be located before the dosing port for sodium carbonate to ensure that silicon in the water is removed first, and then calcium and magnesium in the water are removed.
吸附剂加药系统5则位于碳酸钠加药口之后，当脱硫脱硝废水中含有机物，需要处理至直排标准时，可以投加吸附剂，同时在反应区3充分吸附反应。The adsorbent dosing system 5 is located after the sodium carbonate dosing port. When the desulfurization and denitrification wastewater contains organic matter and needs to be treated to the direct discharge standard, the adsorbent can be added and fully adsorbed in the reaction zone 3.
本实施例通过设置除硬系统，将脱硫脱硝废水中的硅、钙、镁等致垢离子进行去除，避免对气膜系统的不利影响，提高系统稳定运行性能，延长膜系统清洗周期及膜使用寿命。通过投加粉末活性炭等吸附药剂，可有效去除因使用废碱液中和脱硫脱硝废水pH时带入的有机污染物，可以使废水达到直排要求。This embodiment sets up a hardness removal system to remove scale-causing ions such as silicon, calcium, and magnesium in the desulfurization and denitrification wastewater, avoid adverse effects on the gas membrane system, improve the stable operation performance of the system, and extend the membrane system cleaning cycle and membrane service life. By adding adsorbents such as powdered activated carbon, organic pollutants introduced when the pH of the desulfurization and denitrification wastewater is neutralized with waste alkali liquid can be effectively removed, so that the wastewater can meet the direct discharge requirements.
所述的混凝加药系统7包括投加混凝剂和絮凝剂，可将反应区形成的固体小颗粒、进水中的悬浮物或胶体、吸附剂等在沉淀区进行去除。混凝剂可以是氯化铝、硫酸铁、聚合氯化铝、聚合硫酸铁中的一种或多种的混合，投加量为20～300mg/L。其中，絮凝剂可以是不同分子量的阴离子聚丙烯酰胺、阳离子聚丙烯酰胺的任意一种，投加量为0.1ppm～2ppm。其中，吸附剂可以是活性炭类材料、活性焦类材料中的一种或多种的混合，投加量为0～200mg/L，材料的粒径小于0.1mm。其中，除硬药剂可以是氢氧化钠、碳酸钠、氢氧化钙中的一种或多种的混合。The coagulation and dosing system 7 includes adding coagulants and flocculants, which can remove small solid particles formed in the reaction zone, suspended matter or colloids in the influent, adsorbents, etc. in the sedimentation zone. The coagulant can be a mixture of one or more of aluminum chloride, ferric sulfate, polyaluminum chloride, and polyferric sulfate, and the dosage is 20 to 300 mg/L. Among them, the flocculant can be any one of anionic polyacrylamide and cationic polyacrylamide of different molecular weights, and the dosage is 0.1ppm to 2ppm. Among them, the adsorbent can be a mixture of one or more of activated carbon materials and activated coke materials, and the dosage is 0 to 200 mg/L, and the particle size of the material is less than 0.1mm. Among them, the hardness removal agent can be a mixture of one or more of sodium hydroxide, sodium carbonate, and calcium hydroxide.
混合池6出水进入到沉淀池8，经过沉淀后的出水再进入到过滤系统9。过滤系统9出水完成了强化预处理。过滤系统9进一步去除水中的悬浮物，避免对气膜处理单元的不利影响；所述气膜处理单元包括加碱系统、气膜系统和加酸系统。The effluent from the mixing tank 6 enters the sedimentation tank 8, and the effluent after sedimentation enters the filtration system 9. The effluent from the filtration system 9 completes the enhanced pretreatment. The filtration system 9 further removes suspended matter in the water to avoid adverse effects on the air film treatment unit; the air film treatment unit includes an alkali addition system, an air film system, and an acid addition system.
过滤后废水经泵加至密闭的加碱中间罐10。其中，碱液存储罐11的氢氧化钠碱液经泵加入加碱中间罐中，使进水pH调节至9～13，加碱中间罐的水随后经泵流入气膜处理系统。气膜处理系统可以设置多级，本实施例中以三级为例，包括一级膜系统12，二级膜系统15，三级膜系统18，各级膜系统串联运行，每级之间设有中间水罐，包括1号水罐14，2号水罐17。每一级膜系统配置一套加酸系统。包括一级加酸系统13，二级加酸系统16，三级加酸系统19，所用的酸为硫酸、盐酸、硝酸或磷酸的任一种。The filtered wastewater is pumped into the sealed alkali-adding intermediate tank 10. Among them, the sodium hydroxide alkali solution in the alkali solution storage tank 11 is pumped into the alkali-adding intermediate tank to adjust the pH of the inlet water to 9-13, and the water in the alkali-adding intermediate tank is then pumped into the air membrane treatment system. The air membrane treatment system can be set up in multiple stages. In this embodiment, three stages are taken as an example, including a primary membrane system 12, a secondary membrane system 15, and a tertiary membrane system 18. The membrane systems at each level are operated in series, and an intermediate water tank is provided between each level, including water tank No. 1 14 and water tank No. 2 17. Each membrane system is equipped with an acid-adding system. It includes a primary acid-adding system 13, a secondary acid-adding system 16, and a tertiary acid-adding system 19. The acid used is any one of sulfuric acid, hydrochloric acid, nitric acid or phosphoric acid.
其中，在本实施例中，气膜处理系统出水端设置有氨氮在线分析仪20，通过电磁阀21控制出水的流向，当气膜处理单元出水氨氮满足设计要求时，出水直接排放；当气膜处理单元出水氨氮浓度不满足排放要求时，可根据超标程度从回流管22自动回流至中间水罐14和17。从而可以有效解决脱硫脱硝废水中氨氮浓度易于波动，且有极高浓度负荷时的稳定运行性能难题。Among them, in this embodiment, an ammonia nitrogen online analyzer 20 is provided at the outlet of the air film treatment system, and the flow direction of the outlet water is controlled by the solenoid valve 21. When the ammonia nitrogen concentration of the outlet water of the air film treatment unit meets the design requirements, the outlet water is directly discharged; when the ammonia nitrogen concentration of the outlet water of the air film treatment unit does not meet the discharge requirements, it can automatically flow back from the reflux pipe 22 to the intermediate water tanks 14 and 17 according to the degree of excess. This can effectively solve the problem of the easy fluctuation of ammonia nitrogen concentration in the desulfurization and denitrification wastewater and the stable operation performance problem under extremely high concentration load.
本实用新型设计的烟气脱硫脱硝废水处理系统，通过设置加碱系统，增加了废水处理液的pH值，使得污水中NH4 +的转化为游离的NH3，并跨膜通过加酸系统，被酸吸收液捕获。回收的氨盐具有较高的经济价值，降低了脱硫脱硝废水处理成本。该系统适于处理各种浓度的氨氮废水，且出水水质稳定。减少回收工艺的运行成本，提升回收工艺的效率。The flue gas desulfurization and denitrification wastewater treatment system designed by the utility model increases the pH value of the wastewater treatment liquid by setting up an alkali addition system, so that NH 4 + in the sewage is converted into free NH 3 , and passes through the membrane through the acid addition system and is captured by the acid absorption liquid. The recovered ammonia salt has a high economic value, which reduces the cost of desulfurization and denitrification wastewater treatment. The system is suitable for treating ammonia nitrogen wastewater of various concentrations, and the effluent water quality is stable. The operating cost of the recovery process is reduced and the efficiency of the recovery process is improved.
以上的实施例仅仅是对本实用新型的优选实施方式进行描述，并非对本实用新型的范围进行限定，在不脱离本实用新型设计精神的前提下，本领域普通技术人员对本实用新型的技术方案作出的各种变形和改进，均应落入本实用新型权利要求书确定的保护范围内。The above embodiments are merely descriptions of the preferred implementation modes of the present invention, and are not intended to limit the scope of the present invention. Without departing from the design spirit of the present invention, various modifications and improvements made to the technical solutions of the present invention by ordinary technicians in this field should fall within the protection scope determined by the claims of the present invention.
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