WO2022036890A1 - 一种废水处理用烟气抽取混合装置及方法 - Google Patents

一种废水处理用烟气抽取混合装置及方法 Download PDF

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WO2022036890A1
WO2022036890A1 PCT/CN2020/128442 CN2020128442W WO2022036890A1 WO 2022036890 A1 WO2022036890 A1 WO 2022036890A1 CN 2020128442 W CN2020128442 W CN 2020128442W WO 2022036890 A1 WO2022036890 A1 WO 2022036890A1
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flue gas
extraction
branch pipe
flue
mixing
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PCT/CN2020/128442
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English (en)
French (fr)
Inventor
吕晨峰
殷结峰
武宝会
成新兴
黄尊对
胡新
李元昊
黄钢英
杨博
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西安西热锅炉环保工程有限公司
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Publication of WO2022036890A1 publication Critical patent/WO2022036890A1/zh

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F25/00—Flow mixers; Mixers for falling materials, e.g. solid particles
    • B01F25/40—Static mixers
    • B01F25/42—Static mixers in which the mixing is affected by moving the components jointly in changing directions, e.g. in tubes provided with baffles or obstructions
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F23/00—Mixing according to the phases to be mixed, e.g. dispersing or emulsifying
    • B01F23/10—Mixing gases with gases
    • B01F23/19—Mixing systems, i.e. flow charts or diagrams; Arrangements, e.g. comprising controlling means
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F35/00—Accessories for mixers; Auxiliary operations or auxiliary devices; Parts or details of general application
    • B01F35/71—Feed mechanisms
    • B01F35/712—Feed mechanisms for feeding fluids
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/02—Treatment of water, waste water, or sewage by heating
    • C02F1/04—Treatment of water, waste water, or sewage by heating by distillation or evaporation
    • C02F1/048—Purification of waste water by evaporation
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/02—Treatment of water, waste water, or sewage by heating
    • C02F1/04—Treatment of water, waste water, or sewage by heating by distillation or evaporation
    • C02F1/10—Treatment of water, waste water, or sewage by heating by distillation or evaporation by direct contact with a particulate solid or with a fluid, as a heat transfer medium
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/02—Treatment of water, waste water, or sewage by heating
    • C02F1/04—Treatment of water, waste water, or sewage by heating by distillation or evaporation
    • C02F1/16—Treatment of water, waste water, or sewage by heating by distillation or evaporation using waste heat from other processes

Definitions

  • the invention relates to a flue gas mixing device and method, in particular to a flue gas extraction and mixing device and method for waste water treatment.
  • Coal-fired power plants are large consumers of water and water, and have great water-saving potential under the situation of increasingly tight water resources.
  • the power plant In order to reduce the water consumption index, the power plant generally uses the water in steps to improve the recycling rate of water and reduce the discharge of waste water.
  • High-quality water is used for chemical water production, chemical water production produces high brine, circulating sewage and other boiler drainage as process water for wet desulfurization system, desulfurization system wastewater is centrifugally separated by cyclone to produce desulfurization wastewater.
  • the overall technical idea to achieve zero discharge of desulfurization wastewater at this stage is: desulfurization wastewater ⁇ pretreatment ⁇ concentration reduction ⁇ evaporative crystallization.
  • the low-temperature flue gas evaporation process is widely used, that is, the low-temperature flue gas between the outlet of the induced draft fan and the inlet of the desulfurization tower 16 is used as a heat source to enter the wastewater concentration tower 8, and the high-salt desulfurization wastewater is introduced into the wastewater concentration tower for atomization. , the atomized wastewater and the low-temperature flue gas are mixed and evaporated, so as to achieve the purpose of concentration and weight reduction of the wastewater.
  • the flue between the induced draft fan outlet and the desulfurization tower is relatively short after the outlet of the induced draft fan is combined, resulting in the extraction point and the mixing point being too close, which affects the normal operation of the wastewater concentration tower.
  • Extracted flue gas quality Improper design of the mixing section between the flue gas at the exit of the waste water concentration tower and the flue gas at the entrance of the desulfurization tower can easily form eddy currents.
  • the gas inlet may cause the hidden danger of ash accumulation at the inlet of the desulfurization tower.
  • the automatic control level of the existing flue gas extraction and mixing device for waste water is not high, and the operation energy consumption is high.
  • the purpose of the present invention is to overcome the shortcomings of the above-mentioned prior art, and to provide a flue gas extraction and mixing device and method for waste water treatment, which can effectively reduce the hedging during flue gas mixing, and simultaneously eliminate the ash accumulation at the inlet of the desulfurization tower. hidden danger.
  • the flue gas extraction and mixing device for wastewater treatment includes a first extraction flue gas branch pipe, a first induced draft fan outlet flue, a second extraction flue gas branch pipe, a second induced draft fan outlet flue, and waste water.
  • One end of the first branch pipe for extracting smoke is communicated with the smoke outlet of the outlet flue of the first induced draft fan, and one end of the second branch pipe for extracting smoke is communicated with the smoke outlet of the outlet flue of the second induced draft fan.
  • the other end of the gas branch pipe and the other end of the second extraction flue gas branch pipe are connected with the flue gas inlet of the waste water concentration tower through the pipes and pipes.
  • the flue gas outlet of the waste water concentration tower passes through the waste water concentration tower outlet flue and the inlet of the mixing branch pipe
  • the outlet of the mixing branch pipe is connected with the first inlet of the mixing chamber, the mixing branch pipes are distributed obliquely, the outlet of the mixing chamber is connected with the inlet of the desulfurization tower, and the other end of the first branch pipe for extracting flue gas is connected to the second
  • the other end of the gas branch pipe is connected with the second inlet of the mixing chamber after passing through the pipe and is connected to the second inlet of the mixing chamber.
  • Deflector for deflecting.
  • a first electric air valve is arranged on both the first branch pipe for extracting flue gas and the second branch pipe for extracting flue gas.
  • the first extraction flue gas branch pipe and the second extraction flue gas branch pipe are connected with the flue gas inlet of the waste water concentration tower through the extraction flue gas confluence pipe, the variable frequency booster fan and the inlet flue of the waste water concentration tower.
  • a second electric air valve is arranged on the outlet flue of the waste water concentration tower.
  • the included angle between the axis of the mixing branch pipe and the axis of the confluent flue at the outlet of the induced draft fan is 45°-50°.
  • It also includes a controller, and detectors for detecting the temperature, pressure and flow of the flue gas are arranged on the extraction flue gas confluence pipe, the waste water concentration tower, the outlet flue of the waste water concentration tower and the inlet flue of the desulfurization tower, wherein the output end of the detector is It is connected with the input end of the controller, and the output end of the controller is connected with the control end of the variable frequency booster fan, the control end of the first electric air valve and the control end of the second electric air valve.
  • a flue gas extraction and mixing method for wastewater treatment comprises the following steps:
  • the flue gas extracted by the first extraction flue gas branch pipe and the second extraction flue gas branch pipe merges and enters the waste water concentration tower for heat release.
  • the flue gas output from the waste water concentration tower enters the mixing branch pipe through the outlet flue of the waste water concentration tower, and then It enters the mixing chamber through the mixing branch pipe.
  • the flue gas output from the first induced draft fan outlet flue and the second induced draft fan outlet flue converge and enter the mixing chamber through the induced draft fan outlet to join the flue.
  • a flue gas baffle is arranged at the first entrance of the chamber, and the flue gas near the first entrance in the output flue gas from the outlet of the induced draft fan is diverted and displaced by the flue gas baffle, so as to avoid this part of the flue gas.
  • the flue gas output from the mixing branch pipe is impacted, and the flue gas output from the mixing chamber enters the desulfurization tower.
  • the flue gas extraction and mixing device and method for wastewater treatment of the present invention adopts the method of extracting flue gas at two points through the first extraction flue gas branch pipe and the second extraction flue gas branch pipe. It has better adaptability, effectively widens the distance between the flue gas extraction and mixing sections, and ensures the quality of the flue gas extraction.
  • the present invention completes the mixing of the flue gas through the flue gas static mixer, which effectively avoids the vortex generated at the inlet of the desulfurization tower.
  • Rotation to prevent the slurry in the desulfurization tower from entering the entrance of the desulfurization tower to cause deposition, effectively avoiding the hidden danger of ash accumulation, and at the same time, after the flue gas is mixed by the static mixer, it avoids the energy consumption caused by the flue gas hedging, which is beneficial to reduce the system resistance and reduce the energy consumption of the induced draft fan. .
  • FIG. 1 is a schematic diagram of the system of the present invention.
  • 1 is the outlet flue of the induced draft fan
  • 2 is the confluence flue of the induced draft fan outlet
  • 3 is the first electric air valve
  • 4 is the branch pipe for extracting flue gas
  • 5 is the confluence pipe for extracting flue gas
  • 6 is the variable frequency booster fan
  • 7 is the inlet flue of the waste water concentration tower
  • 8 is the waste water concentration tower
  • 9 is the outlet flue of the waste water concentration tower
  • 10 is the second electric air valve
  • 11 is the inlet flue of the desulfurization tower
  • 12 is the flue gas static mixer
  • 13 is the mixing
  • the branch pipe, 14 is a flue gas baffle
  • 15 is a guide plate
  • 16 is a desulfurization tower
  • 17 is a controller.
  • the flue gas extraction and mixing device for wastewater treatment includes a first extraction flue gas branch pipe 4a, a first induced draft fan outlet flue 1a, a second extraction flue gas branch pipe 4b, and a second induced draft fan outlet flue.
  • the static mixer includes a mixing branch pipe 13 and a mixing chamber;
  • the smoke extraction port of the outlet flue 1a of the fan is connected, one end of the second extraction flue gas branch pipe 4b is connected with the smoke extraction opening of the outlet flue 1b of the second induced draft fan, and the other end of the first extraction flue gas branch pipe 4a and the second exhaust gas extraction pipe 4a are connected with each other.
  • the other end of the extraction flue gas branch pipe 4b is connected with the flue gas inlet of the waste water concentration tower 8 after passing through the pipeline, and the flue gas outlet of the waste water concentration tower 8 is connected with the inlet of the mixing branch pipe 13 through the waste water concentration tower outlet flue 9,
  • the outlet of the mixing branch pipe 13 is communicated with the first inlet of the mixing chamber, the mixing branch pipe 13 is distributed obliquely, the outlet of the mixing chamber is communicated with the inlet of the desulfurization tower 16, and the other end of the first extraction flue gas branch pipe 4a is connected with the second extraction
  • the other end of the flue gas branch pipe 4b is connected with the second inlet of the mixing chamber after passing through the pipe.
  • the deflector 15 for guiding the output flue gas.
  • a first electric air valve 3 is provided on both the first branch pipe 4a for extracting smoke and the second branch pipe 4b for extracting smoke.
  • the first extraction flue gas branch pipe 4a and the second extraction flue gas branch pipe 4b pass through the pipeline and then pass through the extraction flue gas confluence pipe 5, the variable frequency booster fan 6, the inlet flue 7 of the waste water concentration tower and the flue gas inlet of the waste water concentration tower 8.
  • a second electric air valve 10 is arranged on the outlet flue 9 of the waste water concentration tower, and the included angle between the axis of the mixing branch pipe 13 and the axis of the confluence flue 2 at the outlet of the induced draft fan is 45°-50°.
  • the flue gas extraction and mixing method for wastewater treatment according to the present invention comprises the following steps:
  • the flue gas extracted by the first extraction flue gas branch pipe 4a and the second extraction flue gas branch pipe 4b merge and enter the waste water concentration tower 8 to release heat, and the flue gas output from the waste water concentration tower 8 enters the waste water concentration tower outlet flue 9 into In the mixing branch pipe 13, and then enter the mixing chamber through the mixing branch pipe 13.
  • the flue gas output from the first induced draft fan outlet flue 1a and the second induced draft fan outlet flue 1b converge and merge into the flue through the induced draft fan outlet.
  • the first inlet of the mixing chamber is provided with a flue gas baffle 14, through which the flue gas baffle 14 merges with the outlet of the induced draft fan and the flue 2 outputs the flue gas close to the first inlet.
  • the flue gas is guided and displaced to avoid the impact of this part of the flue gas on the flue gas output from the mixing branch pipe 13 , and the flue gas output from the mixing chamber enters the desulfurization tower 16 .
  • the flue gas extraction confluence pipe 5, the waste water concentration tower 8, the waste water concentration tower outlet flue 9 and the desulfurization tower inlet flue 11 are all provided with detectors for detecting the temperature, pressure and flow of the flue gas, wherein the output end of the detector It is connected with the input end of the controller 17, and the output end of the controller 17 is connected with the control end of the variable frequency booster fan 6, the control end of the first electric air valve 3 and the control end of the second electric air valve 10, and the controller 17 According to the data detected by the detector, it is fed back to the variable frequency booster fan 6 to complete the variable frequency operation of the fan, increasing or reducing the amount of flue gas extracted, so as to meet the required flue gas volume of the waste water concentration tower 8 in real time, and ensure that the smoke at the outlet of the waste water concentration tower is guaranteed.
  • the flue gas parameters in the flue gas static mixer 12 from the channel 9 meet the requirements, and the first electric air valve 3 and the second electric air valve 10 can be controlled to close during the maintenance stage of the device failure or

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  • Chemical Kinetics & Catalysis (AREA)
  • Environmental & Geological Engineering (AREA)
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Abstract

一种废水处理用烟气抽取混合装置及方法，包括第一抽取烟气支管(4a)、第一引风机出口烟道(1a)、第二抽取烟气支管(4b)、第二引风机出口烟道(1b)、废水浓缩塔(8)、废水浓缩塔出口烟道(9)、脱硫塔(16)及静态混合器，所述静态混合器包括混合支管(13)及混合腔室，该装置及方法能够有效降低烟气混合时的对冲，同时消除脱硫塔(16)入口积灰的隐患。

Description

一种废水处理用烟气抽取混合装置及方法 技术领域
本发明涉及一种烟气混合装置及方法，具体涉及一种废水处理用烟气抽取混合装置及方法。
背景技术
燃煤电厂是取水和耗水大户，在水资源日益紧张的形势下具有较大的节水潜力。电厂为了降低耗水指标，一般通过水的阶梯使用以提高水的回收利用率，减少废水排放。优质水用于化学制水，化学制水产生高盐水、循环排污水等各类锅炉排水作为湿法脱硫系统的工艺水，脱硫系统废水旋流器离心分离后产生脱硫废水。
为了实现脱硫废水零排放，目前现阶段实现脱硫废水零排放的整体技术思路为：脱硫废水→预处理→浓缩减量→蒸发结晶。在浓缩减量阶段广泛用到低温烟气蒸发工艺，即通过引接引风机出口至脱硫塔16入口之间低温烟气作为热源进入废水浓缩塔8，将高盐脱硫废水引入废水浓缩塔中雾化，雾化废水与低温烟气混合蒸发，从而达到废水浓缩减量的目的，经废水浓缩塔蒸发降温后低温烟气回到脱硫塔16入口烟道11。
废水浓缩塔烟气抽取及浓缩塔后烟混合的位置选取不当或抽取及混合段连接方式不当，不仅影响废水浓缩塔增压风机的功耗，还有对脱硫系统产生影响的风险。现有废水处理用烟气抽取及混合一般选在引风机后汇合后至脱硫塔入口前直段烟道。由于现有及新建电厂脱硫岛引风机出口至脱硫塔之间空间普遍比较紧张，引风机出口汇合后值脱硫塔之间 烟道较短，造成抽取点及混合点过近，影响废水浓缩塔正常抽取烟气质量。废水浓缩塔出口烟气与脱硫塔入口烟气混合段设计不当，容易形成涡流，一方面烟气对冲造成系统阻力增大，增加系统风机能耗，另一方面，脱硫塔内浆液被带入烟气入口，有造成脱硫塔入口积灰的隐患。另外，现有废水用烟气抽取及混合装置自动控制水平不高，运行能耗高。
发明内容
本发明的目的在于克服上述现有技术的缺点，提供了一种废水处理用烟气抽取混合装置及方法，该装置及方法能够有效降低烟气混合时的对冲，同时消除脱硫塔入口积灰的隐患。
为达到上述目的，本发明所述的废水处理用烟气抽取混合装置包括第一抽取烟气支管、第一引风机出口烟道、第二抽取烟气支管、第二引风机出口烟道、废水浓缩塔、废水浓缩塔出口烟道、脱硫塔及静态混合器，所述静态混合器包括混合支管及混合腔室；
第一抽取烟气支管的一端与第一引风机出口烟道的取烟口相连通，第二抽取烟气支管的一端与第二引风机出口烟道的取烟口相连通，第一抽取烟气支管的另一端及第二抽取烟气支管的另一端通过管道并管后与废水浓缩塔的烟气入口相连通，废水浓缩塔的烟气出口经废水浓缩塔出口烟道与混合支管的入口相连通，混合支管的出口与混合腔室的第一入口相连通，混合支管倾斜分布，混合腔室的出口与脱硫塔的入口相连通，第一抽取烟气支管的另一端与第二抽取烟气支管的另一端通过管道并管后与混合腔室的第二入口相连通，混合腔室的第一入口处设有烟气挡板，混合腔室内设置于用于对混合支管输出的烟气进行导流的导流板。
第一抽取烟气支管及第二抽取烟气支管上均设置有第一电动风阀门。
第一抽取烟气支管与第二抽取烟气支管通过管道并管后经抽取烟气汇合管、变频增压风机及废水浓缩塔入口烟道与废水浓缩塔的烟气入口相连通。
废水浓缩塔出口烟道上设置有第二电动风阀门。
混合支管的轴线与引风机出口汇合烟道轴线之间的夹角为45°-50°。
还包括控制器，抽取烟气汇合管、废水浓缩塔、废水浓缩塔出口烟道及脱硫塔入口烟道上均设置用于检测烟气温度、压力及流量的检测器，其中，检测器的输出端与控制器的输入端相连接，控制器的输出端与变频增压风机的控制端、第一电动风阀门的控制端及第二电动风阀门的控制端相连接。
一种废水处理用烟气抽取混合方法包括以下步骤：
第一抽取烟气支管与第二抽取烟气支管抽取的烟气汇流后进入到废水浓缩塔中进行放热，废水浓缩塔输出的烟气经废水浓缩塔出口烟道进入到混合支管中，然后经混合支管进入到混合腔室内，于此同时，第一引风机出口烟道及第二引风机出口烟道输出的烟气汇流后经引风机出口汇合烟道进入到混合腔室内，其中，混合腔室的第一入口处设置有烟气挡板，通过所述烟气挡板对引风机出口汇合烟道输出烟气中靠近第一入口的烟气进行导流移位，避免该部分烟气对混合支管输出的烟气冲击，混合腔室输出的烟气进入到脱硫塔中。
本发明具有以下有益效果：
本发明所述的废水处理用烟气抽取混合装置及方法在具体操作时，通过第一抽取烟气支管及第二抽取烟气支管采用两点抽取烟气的方式，在不同现场布置条件下具有较好的适应性，有效拉开烟气抽取及混合段之间的距离，保证烟气抽取的质量，另外，本发明通过烟气静态混合器完成烟气的混合，有效避免脱硫塔入口产生涡旋，避免脱硫塔内浆液进入脱硫塔入口产生沉积，有效避免积灰隐患，同时烟气经静态混合器混合后，避免烟气对冲造成的能量消耗，有利于降低系统阻力，降低引风机能耗。
附图说明
图1是本发明的系统示意图。
其中，1为引风机出口烟道、2为引风机出口汇合烟道、3为第一电动风阀门、4为抽取烟气支管、5为抽取烟气汇合管、6为变频增压风机、7为废水浓缩塔入口烟道、8为废水浓缩塔、9为废水浓缩塔出口烟道、10为第二电动风阀门、11为脱硫塔入口烟道、12为烟气静态混合器、13为混合支管、14为烟气挡板、15为导流板、16为脱硫塔、17为控制器。
具体实施方式
下面结合附图对本发明做进一步详细描述：
参考图1，本发明所述的废水处理用烟气抽取混合装置包括第一抽取烟气支管4a、第一引风机出口烟道1a、第二抽取烟气支管4b、第二引风机出口烟道1b、废水浓缩塔8、废水浓缩塔出口烟道9、脱硫塔16 及静态混合器，所述静态混合器包括混合支管13及混合腔室；第一抽取烟气支管4a的一端与第一引风机出口烟道1a的取烟口相连通，第二抽取烟气支管4b的一端与第二引风机出口烟道1b的取烟口相连通，第一抽取烟气支管4a的另一端及第二抽取烟气支管4b的另一端通过管道并管后与废水浓缩塔8的烟气入口相连通，废水浓缩塔8的烟气出口经废水浓缩塔出口烟道9与混合支管13的入口相连通，混合支管13的出口与混合腔室的第一入口相连通，混合支管13倾斜分布，混合腔室的出口与脱硫塔16的入口相连通，第一抽取烟气支管4a的另一端与第二抽取烟气支管4b的另一端通过管道并管后与混合腔室的第二入口相连通，混合腔室的第一入口处设有烟气挡板14，混合腔室内设置于用于对混合支管13输出的烟气进行导流的导流板15。
第一抽取烟气支管4a及第二抽取烟气支管4b上均设置有第一电动风阀门3。
第一抽取烟气支管4a与第二抽取烟气支管4b通过管道并管后经抽取烟气汇合管5、变频增压风机6及废水浓缩塔入口烟道7与废水浓缩塔8的烟气入口相连通；废水浓缩塔出口烟道9上设置有第二电动风阀门10，混合支管13的轴线与引风机出口汇合烟道2轴线之间的夹角为45°-50°。
本发明所述的废水处理用烟气抽取混合方法包括以下步骤：
第一抽取烟气支管4a与第二抽取烟气支管4b抽取的烟气汇流后进入到废水浓缩塔8中进行放热，废水浓缩塔8输出的烟气经废水浓缩塔出口烟道9进入到混合支管13中，然后经混合支管13进入到混合腔室 内，于此同时，第一引风机出口烟道1a及第二引风机出口烟道1b输出的烟气汇流后经引风机出口汇合烟道2进入到混合腔室内，其中，混合腔室的第一入口处设置有烟气挡板14，通过所述烟气挡板14对引风机出口汇合烟道2输出烟气中靠近第一入口的烟气进行导流移位，避免该部分烟气对混合支管13输出的烟气冲击，混合腔室输出的烟气进入到脱硫塔16中。
抽取烟气汇合管5、废水浓缩塔8、废水浓缩塔出口烟道9及脱硫塔入口烟道11上均设置用于检测烟气温度、压力及流量的检测器，其中，检测器的输出端与控制器17的输入端相连接，控制器17的输出端与变频增压风机6的控制端、第一电动风阀门3的控制端及第二电动风阀门10的控制端相连接，控制器17根据检测器检测的数据，反馈给变频增压风机6完成风机变频运行动作，增加或减少抽取的烟气量，从而达到实时满足废水浓缩塔8所需烟气量，保证废水浓缩塔出口烟道9进入烟气静态混合器12中烟气参数满足要求，同时也可以在装置故障或者装置停止运行检修阶段控制第一电动风阀门3及第二电动风阀门10关闭。

Claims (7)

  1. 一种废水处理用烟气抽取混合装置，其特征在于，包括第一抽取烟气支管(4a)、第一引风机出口烟道(1a)、第二抽取烟气支管(4b)、第二引风机出口烟道(1b)、废水浓缩塔(8)、废水浓缩塔出口烟道(9)、脱硫塔(16)及静态混合器，所述静态混合器包括混合支管(13)及混合腔室；
    第一抽取烟气支管(4a)的一端与第一引风机出口烟道(1a)的取烟口相连通，第二抽取烟气支管(4b)的一端与第二引风机出口烟道(1b)的取烟口相连通，第一抽取烟气支管(4a)的另一端及第二抽取烟气支管(4b)的另一端通过管道并管后与废水浓缩塔(8)的烟气入口相连通，废水浓缩塔(8)的烟气出口经废水浓缩塔出口烟道(9)与混合支管(13)的入口相连通，混合支管(13)的出口与混合腔室的第一入口相连通，混合支管(13)倾斜分布，混合腔室的出口与脱硫塔(16)的入口相连通，第一抽取烟气支管(4a)的另一端与第二抽取烟气支管(4b)的另一端通过管道并管后与混合腔室的第二入口相连通，混合腔室的第一入口处设有烟气挡板(14)，混合腔室内设置于用于对混合支管(13)输出的烟气进行导流的导流板(15)。
  2. 根据权利要求1所述的废水处理用烟气抽取混合装置，其特征在于，第一抽取烟气支管(4a)及第二抽取烟气支管(4b)上均设置有第一电动风阀门(3)。
  3. 根据权利要求2所述的废水处理用烟气抽取混合装置，其特征在于，第一抽取烟气支管(4a)与第二抽取烟气支管(4b)通过管道并管后经抽取烟气汇合管(5)、变频增压风机(6)及废水浓缩塔入口烟道(7)与废水浓缩塔(8)的烟气入口相连通。
  4. 根据权利要求3所述的废水处理用烟气抽取混合装置，其特征在于，废水浓缩塔出口烟道(9)上设置有第二电动风阀门(10)。
  5. 根据权利要求1所述的废水处理用烟气抽取混合装置，其特征在于，混合支管(13)的轴线与引风机出口汇合烟道(2)轴线之间的夹角为45°-50°。
  6. 根据权利要求4所述的废水处理用烟气抽取混合装置，其特征在于，还包括控制器(17)，抽取烟气汇合管(5)、废水浓缩塔(8)、废水浓缩塔出口烟道(9)及脱硫塔入口烟道(11)上均设置用于检测烟气温度、压力及流量的检测器，其中，检测器的输出端与控制器(17)的输入端相连接，控制器(17)的输出端与变频增压风机(6)的控制端、第一电动风阀门(3)的控制端及第二电动风阀门(10)的控制端相连接。
  7. 一种废水处理用烟气抽取混合方法，其特征在于，基于权利要求1-6任一项所述的废水处理用烟气抽取混合装置，包括以下步骤：
    第一抽取烟气支管(4a)与第二抽取烟气支管(4b)抽取的烟气汇流后进入到废水浓缩塔(8)中进行放热，废水浓缩塔(8)输出的烟气经废水浓缩塔出口烟道(9)进入到混合支管(13)中，然后经混合支管(13)进入到混合腔室内，于此同时，第一引风机出口烟道(1a)及第二引风机出口烟道(1b)输出的烟气汇流后经引风机出口汇合烟道(2)进入到混合腔室内，其中，混合腔室的第一入口处设置有烟气挡板(14)，通过所述烟气挡板(14)对引风机出口汇合烟道(2)输出烟气中靠近第一入口的烟气进行导流移位，避免该部分烟气对混合支管(13)输出的烟气冲击，混合腔室输出的烟气进入到脱硫塔(16)中。
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