CN111871140A - An oval ultrafine particle condensing box - Google Patents
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- 239000011882 ultra-fine particle Substances 0.000 title claims abstract description 17
- 238000009833 condensation Methods 0.000 claims abstract description 22
- 230000005494 condensation Effects 0.000 claims abstract description 22
- 239000000428 dust Substances 0.000 claims abstract description 19
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims abstract description 14
- 239000003546 flue gas Substances 0.000 claims abstract description 14
- 239000012717 electrostatic precipitator Substances 0.000 claims abstract description 12
- 230000015271 coagulation Effects 0.000 claims description 19
- 238000005345 coagulation Methods 0.000 claims description 19
- 238000009434 installation Methods 0.000 abstract description 3
- 239000002245 particle Substances 0.000 description 10
- 238000000034 method Methods 0.000 description 9
- 239000003463 adsorbent Substances 0.000 description 6
- 239000004071 soot Substances 0.000 description 6
- 239000002131 composite material Substances 0.000 description 4
- 239000010419 fine particle Substances 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 238000000746 purification Methods 0.000 description 4
- 239000003344 environmental pollutant Substances 0.000 description 3
- 230000007246 mechanism Effects 0.000 description 3
- 231100000719 pollutant Toxicity 0.000 description 3
- 239000002594 sorbent Substances 0.000 description 3
- 230000007704 transition Effects 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 238000005054 agglomeration Methods 0.000 description 2
- 230000002776 aggregation Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000005684 electric field Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000003517 fume Substances 0.000 description 2
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- QSHDDOUJBYECFT-UHFFFAOYSA-N mercury Chemical compound [Hg] QSHDDOUJBYECFT-UHFFFAOYSA-N 0.000 description 2
- 229910052753 mercury Inorganic materials 0.000 description 2
- 238000005507 spraying Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 239000013618 particulate matter Substances 0.000 description 1
- 238000005192 partition Methods 0.000 description 1
- 238000000053 physical method Methods 0.000 description 1
- 238000011197 physicochemical method Methods 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 239000012716 precipitator Substances 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000000779 smoke Substances 0.000 description 1
- 230000002195 synergetic effect Effects 0.000 description 1
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D51/00—Auxiliary pretreatment of gases or vapours to be cleaned
- B01D51/02—Amassing the particles, e.g. by flocculation
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D50/00—Combinations of methods or devices for separating particles from gases or vapours
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Abstract
一种椭圆形超细颗粒凝并箱，整个凝并箱呈箱式，适于安装在电—袋除尘器之间；凝并箱由进气口、出气口、凝并区和灰斗组成；进气口为电除尘器之后的通道，烟气由电除尘器而来；凝并区中设置有2~4组横条，横条横置于凝并区中，横条的断面形状为椭圆形；出气口位于凝并区下部，灰斗上方，设置成过流通道，经凝并之后的烟气进入袋式除尘器进行处理。本发明针对性强、适应面广、构造优化、可靠性好。
An oval ultra-fine particle condensing box, the whole condensing box is box-type, suitable for installation between electric-bag dust collectors; the condensing box is composed of an air inlet, an air outlet, a condensing area and an ash hopper; The air inlet is the passage behind the electrostatic precipitator, and the flue gas comes from the electrostatic precipitator; there are 2~4 sets of horizontal bars in the condensation area, the horizontal bars are placed in the condensation area, and the cross-sectional shape of the horizontal bars is oval The air outlet is located in the lower part of the condensation area, above the ash hopper, and is set as a flow passage, and the flue gas after condensation and condensation enters the bag filter for treatment. The invention has strong pertinence, wide adaptability, optimized structure and good reliability.
Description
技术领域technical field
本发明属于烟气除尘处理领域，涉及一种椭圆形超细颗粒凝并箱。The invention belongs to the field of flue gas dedusting treatment, and relates to an elliptical ultrafine particle condensing box.
背景技术Background technique
近年来，我国大中城市雾霾天气越来越多，严重影响了城市居民的健康工作和生活，其中城市环境中PM2.5(主要为PM0.4-1.0)含量过高是导致雾霾天气的主要原因。因此，如何控制PM2.5产生，并减少其存在，成为亟待解决的问题。In recent years, there have been more and more smog weather in large and medium-sized cities in China, which seriously affects the healthy work and life of urban residents. Among them, the high content of PM 2.5 (mainly PM 0.4-1.0 ) in the urban environment is the main cause of smog weather. reason. Therefore, how to control the generation of PM 2.5 and reduce its existence has become an urgent problem to be solved.
中国专利CN101664623A公开了涉及用于工业烟尘治理的微细粒子除尘器。具体是通过对现有二级过滤方式的电袋复合除尘器改进，在滤袋除尘机构的出口与引风机的进口之间设有湍流涡旋机构，该湍流涡旋机构包括湍流涡旋室、烟尘入口管和烟尘出口管。湍流涡旋室为横截面为倒等腰梯形的斗状，其底部连接着灰斗室。经过第二级处理的含有较细颗粒物的烟尘进入烟尘入口管，经过导风板，使气流发生向下偏转，进入湍流涡旋室，较细颗粒物与湍流涡旋室内壁产生扩散和碰撞促使微细粒子沉淀，使微细颗粒物从烟尘中分离出来。但该处理工艺中单独用湍流涡旋室进行细颗粒物的物化凝并，凝并效率并不高。Chinese patent CN101664623A discloses a fine particle dust collector for industrial fume control. Specifically, a turbulent vortex mechanism is provided between the outlet of the filter bag dust removal mechanism and the inlet of the induced draft fan, and the turbulent vortex mechanism includes a turbulent vortex chamber, Soot inlet pipe and soot outlet pipe. The turbulent vortex chamber is in the shape of a bucket with an inverted isosceles trapezoid in cross section, and the bottom of which is connected with the ash bucket. After the second-stage treatment, the soot containing finer particles enters the soot inlet pipe, passes through the wind deflector, deflects the airflow downward, and enters the turbulent vortex chamber. The finer particles diffuse and collide with the inner wall of the turbulent vortex to promote fine Particle precipitation separates fine particulate matter from the soot. However, in this treatment process, the turbulent vortex chamber is used alone for the physical, coagulation and coagulation of fine particles, and the coagulation efficiency is not high.
中国专利CN 102423599 A公开了一种一体化脱除工业排放超细和微量污染物的电袋复合净化装置和净化方法。采用沿气流方向依次设置有吸附剂预喷涂装置、静电除尘装置、超细颗粒凝并装置、吸附剂喷入装置和布袋除尘装置的结构形式，提供了一种结构紧凑、运行成本低、检修和运行维护方便、在脱除常量粉尘污染物的同时高效脱除超细和微量污染物的一体化电袋复合净化装置和净化方法。超细颗粒凝并装置由正高压放电电极等组成。超细颗粒凝并装置没有具体的构造，且除荷电外没有形成良好的凝并条件。中国专利CN103007670 A控制细微颗粒，协同脱汞的电袋复合除尘器，涉及工业除尘器。电袋复合除尘器设有电袋过渡区，电袋过渡区设于电场区和袋式除尘区之间；灰斗设于壳体的底部，净气室设于袋式除尘区顶部，出口烟道设于净气室顶部并与净气室连通；吸附剂喷入装置和吸附剂容器设于电袋过渡区的顶部，吸附剂容器的出料口与吸附剂喷入装置的进料口连接。可以使吸咐剂与烟气充分混合，吸咐剂分布更均匀，吸咐剂脱汞效果更好。电袋过渡区设有至少2组阳极板和放电极，阳极板和放电极构成电场通道。Chinese patent CN 102423599 A discloses an electric bag composite purification device and purification method for integrated removal of ultrafine and trace pollutants from industrial emissions. Adopting a structure in which an adsorbent pre-spraying device, an electrostatic precipitator, an ultra-fine particle condensing device, an adsorbent spraying device and a bag dedusting device are sequentially arranged along the airflow direction, it provides a compact structure, low operating cost, and easy maintenance. The utility model relates to an integrated electric bag composite purification device and purification method which is convenient for operation and maintenance, and which can efficiently remove ultrafine and trace pollutants while removing constant dust pollutants. The ultrafine particle coagulation device is composed of positive and high voltage discharge electrodes. The ultrafine particle coagulation device has no specific structure, and good coagulation conditions are not formed except for charging. Chinese patent CN103007670 A is an electric bag composite dust collector for controlling fine particles and synergistic mercury removal, and relates to an industrial dust collector. The electric bag composite precipitator is equipped with an electric bag transition area, which is located between the electric field area and the bag type dust removal area; the ash hopper is located at the bottom of the shell, and the clean air chamber is located at the top of the bag type dust removal area. The channel is located at the top of the clean air chamber and communicated with the clean air chamber; the adsorbent injection device and the adsorbent container are located at the top of the transition area of the electric bag, and the discharge port of the adsorbent container is connected with the feed port of the adsorbent injection device . The sorbent can be fully mixed with the flue gas, the sorbent is distributed more evenly, and the mercury removal effect of the sorbent is better. The transition area of the electric bag is provided with at least two groups of anode plates and discharge electrodes, and the anode plates and the discharge electrodes form an electric field channel.
以上工艺设备，方法复杂、控制运行难、设备投资和运行费用高。The above process equipment has complex methods, difficult control and operation, and high equipment investment and operating costs.
因而，针对凝并效率不高、工艺设备复杂等问题，很有必要在现有技术的基础上，研究开发强化凝并的超细颗粒凝并箱。在传统的除尘器的基础上，增设凝并处理装置，使超细颗粒物通过物理方法或物化方法凝并成较大颗粒，从而在后续除尘器内顺利脱除，是现在除尘技术发展的趋势。Therefore, in view of the problems of low coagulation efficiency and complex process equipment, it is necessary to research and develop ultra-fine particle coagulation boxes with enhanced coagulation on the basis of the existing technology. On the basis of the traditional dust collector, a condensing and processing device is added to make the ultra-fine particles condense into larger particles by physical methods or physicochemical methods, so that they can be removed smoothly in the subsequent dust collectors, which is the current development trend of dust removal technology.
发明内容SUMMARY OF THE INVENTION
发明目的：本发明的目的是为了解决现有技术的不足，提出一种针对性强、适应面广、构造优化、可靠性好的强化凝并的超细颗粒凝并箱。Purpose of the invention: The purpose of the present invention is to solve the deficiencies of the prior art, and to propose an ultra-fine particle coagulation box with strong pertinence, wide adaptability, optimized structure and good reliability to strengthen coagulation.
技术方案：为了实现本发明的目的，本发明采用如下的技术方案。Technical scheme: In order to achieve the purpose of the present invention, the present invention adopts the following technical scheme.
一种椭圆形超细颗粒凝并箱，整个凝并箱呈箱式，适于安装在电—袋除尘器之间；凝并箱由进气口、出气口、凝并区和灰斗组成；进气口为电除尘器之后的通道，烟气由电除尘器而来；凝并区中设置有2~4组横条，横条横置于凝并区中，横条的断面形状为椭圆形；出气口位于凝并区下部，灰斗上方，设置成过流通道，经凝并之后的烟气进入袋式除尘器进行处理；灰斗设置于凝并区下方，与电—袋除尘器的其它灰斗平齐。An oval ultra-fine particle condensing box, the whole condensing box is box-type, suitable for installation between electric-bag dust collectors; the condensing box is composed of an air inlet, an air outlet, a condensing area and an ash hopper; The air inlet is the passage behind the electrostatic precipitator, and the flue gas comes from the electrostatic precipitator; there are 2~4 sets of horizontal bars in the condensation area, the horizontal bars are placed in the condensation area, and the cross-sectional shape of the horizontal bars is oval The air outlet is located in the lower part of the condensation area, above the ash hopper, and is set as a flow passage, and the flue gas after the condensation enters the bag filter for treatment; The other ash buckets are flush.
凝并区中设置的每组横条上下排列，横条的椭圆形长径设置在水平方向，椭圆形长径是短径的2-4倍；横条的高度为10~25cm；相邻两只横条之间的间距取横条高度的1.0~2.0倍；相邻两组横条之间的间距取横条断面长度的1.0~2.0倍，相邻两组横条之间错位设置。Each group of horizontal bars arranged in the coagulation area is arranged up and down, the elliptical long diameter of the horizontal bar is set in the horizontal direction, and the elliptical long diameter is 2-4 times of the short diameter; the height of the horizontal bar is 10~25cm; Only the spacing between the horizontal bars shall be 1.0~2.0 times the height of the horizontal bars; the spacing between the adjacent two groups of horizontal bars shall be 1.0~2.0 times the length of the cross-section of the horizontal bars, and the adjacent two groups of horizontal bars shall be set in dislocation.
凝并箱工作原理：经过电除尘器处理的烟气然后进入凝并区，这时烟气中以超细颗粒物居多，通过“湍流凝并”作用下碰撞凝聚，超细颗粒变成大颗粒，即为粒子粗大化；接着进入到后续袋式除尘器内部，粗大化的粒子便于除尘器收尘，这样便减少了超细颗粒的排放。The working principle of the condensing box: the flue gas treated by the electrostatic precipitator then enters the condensing area. At this time, most of the ultra-fine particles in the flue gas are collided and agglomerated under the action of "turbulent condensation", and the ultra-fine particles become large particles. That is, the particles are coarsened; then they enter the interior of the subsequent bag filter, and the coarsened particles are convenient for the dust collector to collect dust, which reduces the emission of ultra-fine particles.
“湍流凝并”是指通过特殊的构造，造成烟气气流的变化，形成接近湍流的状态。凝并的主要影响因素是颗粒大小、颗粒的凝聚性能与碰撞几率。湍流大大增加了烟气中颗粒的碰撞几率。由于凝并箱的特殊构造，使得凝并箱内分部气流交汇处成为湍流凝并主要发生区域，通过湍流凝并，强化了整体的凝并效果。"Turbulent condensation" refers to the change of flue gas flow through special structures, forming a state close to turbulent flow. The main influencing factors of agglomeration are particle size, particle agglomeration properties and collision probability. Turbulence greatly increases the chance of collision of particles in the flue gas. Due to the special structure of the condensing box, the intersection of the partial airflows in the condensing box becomes the main area where turbulent condensation occurs. Through turbulent condensation, the overall condensation effect is strengthened.
有益效果：本发明提供的装置和现有装置相比具有以下优点。Beneficial effects: Compared with the existing device, the device provided by the present invention has the following advantages.
（1）通过本发明所提供的特殊构造，多种凝并协同作用，提高了凝并效率，PM2.5占烟尘中颗粒的数量浓度较凝并前下降40%~60%，质量浓度较凝并前下降5~15%。(1) Through the special structure provided by the present invention, a variety of coagulation and coagulation synergies improve the coagulation efficiency. The number concentration of PM 2.5 in the dust particles is reduced by 40% to 60% compared with that before coagulation, and the mass concentration is higher than that of coagulation. The former decreased by 5~15%.
（2）本发明所提供的凝并箱显著减少PM2.5的排放。本发明主要通过在袋式除尘器前对超细颗粒物进行凝并，使之能够在袋式除尘器的作用下加以脱除，本发明提供的装置可以提高电—袋除尘器对超细颗粒物的脱除效率，减少超细烟尘的排放。可以在同等的除尘器的工作状态和收集方式的条件下，烟尘中PM2.5去除率提高40％~60%。(2) The condensing box provided by the present invention can significantly reduce the emission of PM 2.5 . The invention mainly condenses the ultrafine particles before the bag filter, so that they can be removed under the action of the bag filter. The device provided by the invention can improve the electrostatic-bag filter to the ultrafine particles. Removal efficiency, reducing the emission of ultra-fine soot. Under the same working state and collection method of the dust collector, the removal rate of PM 2.5 in the smoke can be increased by 40% to 60%.
（3）本发明所提供的凝并箱的各部分，分区合理，功能兼容匹配。(3) Each part of the condensing box provided by the present invention has reasonable partitions and compatible functions.
附图说明Description of drawings
图1为本发明提供的一种椭圆形超细颗粒凝并箱构造示意图。FIG. 1 is a schematic diagram of the structure of an elliptical ultrafine particle condensing box provided by the present invention.
在图1中：1:电除尘器, 2:袋式除尘器,3: 凝并箱,4: 进气口,5:凝并区，6：出气口，7：灰斗，8: 横条。In Figure 1: 1: electrostatic precipitator, 2: bag filter, 3: condensing box, 4: air inlet, 5: condensing area, 6: air outlet, 7: ash hopper, 8: horizontal bar .
具体实施方式Detailed ways
下面结合附图和具体实施例，进一步阐明本发明。The present invention will be further illustrated below in conjunction with the accompanying drawings and specific embodiments.
实施例1Example 1
某工业烟尘废气，处理量为100000m3/h采用本发明提供的凝并箱。整个凝并箱呈箱式，适于安装在电—袋除尘器之间；凝并箱由进气口、出气口、凝并区和灰斗组成；进气口为电除尘器之后的通道，烟气由电除尘器而来；凝并区中设置有4组横条，横条横置于凝并区中，横条的断面形状为椭圆形；出气口位于凝并区下部，灰斗上方，设置成过流通道，经凝并之后的烟气进入袋式除尘器进行处理；灰斗设置于凝并区下方，与电—袋除尘器的其它灰斗平齐。An industrial fume exhaust gas with a treatment capacity of 100,000 m 3 /h adopts the condensing box provided by the present invention. The entire condensing box is box-type, suitable for installation between the electrostatic precipitators; the condensing box is composed of an air inlet, an air outlet, a condensing area and an ash hopper; the air inlet is the passage behind the electrostatic precipitator. The flue gas comes from the electrostatic precipitator; there are 4 sets of horizontal bars in the condensation area, the horizontal bars are placed horizontally in the condensation area, and the cross-sectional shape of the horizontal bars is oval; the air outlet is located in the lower part of the condensation area, above the ash hopper , set as a flow passage, and the flue gas after condensing enters the bag filter for treatment; the ash hopper is set below the condensing area and is flush with other ash hoppers of the electric-bag filter.
凝并区中设置的横条每组上下排列，横条的椭圆形长径设置在水平方向，椭圆形长径是短径的3倍；横条的高度为15cm；相邻两只横条之间的间距取横条高度的1.5倍；相邻两组横条之间的间距取横条断面长度的1.5倍，相邻两组横条错位设置。Each group of horizontal bars arranged in the coagulation area is arranged up and down, the oval long diameter of the horizontal bar is set in the horizontal direction, and the oval long diameter is 3 times the short diameter; the height of the horizontal bar is 15cm; The spacing between them shall be 1.5 times the height of the horizontal bars; the spacing between the adjacent two groups of horizontal bars shall be 1.5 times the length of the cross-section of the horizontal bars, and the adjacent two groups of horizontal bars shall be arranged in dislocation.
采用本发明提供的凝并箱，进行强化凝并，后接袋式除尘器，整个工艺总除尘效率99.98%以上，烟气含尘排放浓度小于30mg/Nm3，PM2.5去除率提高60%。The condensing box provided by the present invention is used for enhanced condensing, followed by a bag-type dust collector. The total dust removal efficiency of the whole process is over 99.98 %.
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| CN106731437A (en) * | 2016-12-27 | 2017-05-31 | 盐城工学院 | The horizontal anchor type ultra-fine grain coalescence case of double jet type |
| CN106823664A (en) * | 2016-12-27 | 2017-06-13 | 盐城工学院 | A kind of horizontal anchor type ultra-fine grain coalescence case |
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2020
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