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废气治理之新莆京www483net十一个要点

文章发布: 发表时间: 2017-05-02 10:23:53

新莆京www483net的工作机理是含尘烟气经过过滤资料(布袋),尘粒被过滤下来,过滤资料(布袋)捕集粗粒粉尘主要靠惯性磕碰作用,捕集细粒粉尘主要靠分散和筛分作用,滤料的粉尘层也有必定的过滤作用。
The working mechanism of environmental protection equipment is dust filtered data (bag), dust is filtered, the filter materials (bags) collection of coarse dust mainly depends on the inertial effect of trapping of fine dust bump, mainly by dispersing and sieving effect, dust filter layer also has the function of filtration will be.
新莆京www483net规划好坏涉及到很多要素,文章从以下要素先容了新莆京www483net的规划关键。
Environmental protection dust removal equipment planning involves many elements, the article describes the key elements of the environmental protection dust removal equipment planning.
一、处理风量
First, the treatment of air volume
?处理风量决议着新莆京www483net器的规范大小,通常处理风量都用工况风量。规划时必定要注意新莆京www483net运用场所及烟气温度,若新莆京www483net的烟气处理温度现已断定,而气体又采纳稀释法冷却时,处理风量还要思考添加稀释的空气量;
Treatment of the air conditioning dust removal equipment, the size of the standard, usually deal with the air flow rate. Planning must pay attention to environmental protection equipment use places and flue gas temperature, if the temperature of the flue gas treatment environmental protection equipment has been concluded, and the gas and adopt dilution cooling air volume, amount of diluted air also thinking;
思考以后的技术变化,风量规划指值在正常风量基础上要添加5%~10%的稳妥系数,不然往后一旦技术调整添加风量,新莆京www483net的过滤速度会进步,从而使设备阻力增大,乃至缩短滤袋运用寿命,也将变成其他毛病频率急剧上升的要素,但若稳妥系数过大,将会添加新莆京www483net的投资和工作费用;
Technology changes after reflection, planning refers to the value and volume coefficient in normal air basis to add 5% to 10%, or back once the technology adjustment added volume, the filtration rate of removal of environmental protection equipment will improve, so that the equipment resistance increases, and even shorten its use life, it will become a sharp rise in the frequency of other factors. But, if the safety factor is too large, will add environmental protection equipment investment and operating costs;
过滤风速因新莆京www483net的形式、滤料的品种及特性的不一样而有很大区别,处理风量一经断定,即可依据断定的过滤风速来决定所有必要的过滤面积。
Because of the variety and characteristics of filtration velocity, dust environmental protection equipment in the form of media is not the same and there is a big difference, volume processed by judge can be a basis to determine filtration velocity to determine all the necessary filtering area.
二、运用温度
Two, the use of temperature
新莆京www483net的运用温度是规划的主要依据,运用温度与规划温度呈现误差,会变成严重后果,由于温度受下述两个条件所制约: 一是不一样滤料原料所允许的最高接受温度(刹那间允许温度和长时间运转温度)有严厉约束;二是为防止结露,气体温度有必要保持在露点20℃以上。
Environmental protection equipment use temperature is the main basis for planning and planning, the use of temperature temperature has error, will become serious consequences, because the temperature is affected by the following two conditions: one is the highest temperature is not the same material material allowed (running temperature allowed temperature and long time instant) have severe constraints; two in order to prevent condensation, it is necessary to keep the gas temperature above 20 DEG C dew point.
对高温气体,有必要将其冷却至滤料能接受的温度以下,冷却方式有多种,较为典型的有天然风管冷却、强行风冷、水冷等,详细可按不一样的技术及冷却温度、安置尺度请求等进行规划选型。
The high temperature gas, it is necessary to the cooling to filter can accept a variety of temperature, cooling way, there are more typical of natural wind cooling, forced air cooling and water cooling, detailed planning and selection according to different technology and cooling temperature, resettlement scale request.
三、气体成分
Three, gas composition
除格外情况外,新莆京www483net所处理的气体,多半是环境空气或炉窑烟气。通常情况下新莆京www483net的规划按处理空气来核算。只要在密度、黏度、质量热容等参数关系到风机动力性能和管道阻力的核算及冷却设备的规划时,才思考气体的成分。
In addition to the special circumstances, the environmental protection dust handling equipment, the majority of the gas is the atmosphere or furnace flue gas. Under normal circumstances, the planning of environmental protection dust removal equipment to deal with air to account. As long as the density, viscosity, mass heat capacity and other parameters related to the performance of wind power and pipeline resistance accounting and cooling equipment planning, only to consider the composition of the gas.
在很多工况的烟气中多富含水分,跟着烟气中水分的添加,新莆京www483net的设备阻力和风机能耗也随之变化。含尘气体中的含水量,可以经过实测来断定,也可以依据焚烧、冷却的物质平衡进行核算。
In many conditions, the flue gas is rich in water, with the addition of moisture in the flue gas, the environmental protection dust removal equipment resistance and fan energy consumption will also change. The content of water in the dusty gas can be determined by the measurement, and can be calculated according to the material balance of burning and cooling.
烟气中有无腐蚀性气体是决议滤料、除尘器壳体原料及防腐等挑选所有必要思考的要素。另外,若烟气中有有毒气体,通常都是微量的,对新莆京www483net的功用没有多大影响,但在处理此类含尘烟气时,新莆京www483net有必要选用不漏气的构造,而且要常常保护,定时维修,防止有毒气体走漏形成安全事故。
Whether or not the corrosive gas in the flue gas is the key factor for the selection of raw materials, such as the filter material, the shell material and the corrosion resistance, etc.. In addition, if there is a toxic gas in the flue gas, usually trace, on the function of environmental protection equipment did not have much impact, but in dealing with such dust, dust environmental protection equipment, it is necessary to use the structure does not leak, but also often protection, regular maintenance, prevent the formation of toxic gas leakage accident.
四、粉尘性质
Four, dust properties
粉尘的性质对新莆京www483net的规划有很大影响,对粉尘一些格外性质,要依据规划经历采纳有用的办法。
The nature of dust has a great impact on the planning of environmental protection dust removal equipment, some of the special nature of dust, according to the planning experience to adopt a useful approach.
五、进口含尘浓度
Five, import dust concentration
进口含尘浓度常以标态体积含尘质量表明,就进口含尘浓度,新莆京www483net规划时要作如下思考
The average concentration of dust contained in the imported dust is indicated by the quality of the dust in the standard state, and the following is the consideration of the imported dust concentration
(1) 设备阻力和清灰周期。进口含尘浓度增大,一样过滤面积情况下,设备阻力也添加,为保持必定的设备阻力,清灰周期也相应缩短;
(1) equipment resistance and ash removal cycle. The inlet dust concentration increases, the same filtration area, the device resistance is also added, in order to maintain certain equipment resistance, dust cleaning cycle is also shortened;
(2) 滤料和箱体的磨损。在粉尘具有强磨损的高浓度情况下,磨损量与含尘浓度成正比,在新莆京www483net进口处应有导流耐磨等处理技术,如烧结粉尘、氧化铝粉、硅砂粉等;
(2) the abrasion of filter media and box. In the dust with high concentration under the condition of strong wear, the wear volume and the dust concentration is proportional to, in environmental protection equipment at the inlet of diversion should wear processing technology, such as sintering dust, alumina powder, silica powder etc.;
(3) 及过滤风速。在进口含尘浓度很高的情况下,应规划较低的过滤风速及规划,但如果规划具有初级沉降功用的构造形式,也可取消预除尘器;
(3) and filtration speed. In the case of high dust concentration in the inlet, the lower filtration wind speed and the planning should be planned, but if the plan has the structure form of the primary sedimentation function, it can also be used to remove the dust collector;
(4) 排灰设备。排灰才能是以能排出悉数搜集的粉尘为规范,排出的粉尘量,等于进口、出口含尘浓度差值与处理风量之积,多级排灰设备才能规划应以下一级大于上一级排灰能力为准。
(4) ash discharging equipment. Ash can be discharged to dust all collected as a standard, the amount of dust discharged, equal to the import and export of dust concentration difference and the flow rate of product, multistage ash discharging equipment to planning should be following a magnitude greater than a row of ash abilities.
六、出口含尘浓度
Six, export dust concentration
出口含尘浓度有必要低于环境保护法规及国家卫生规范的指定值。新莆京www483net的出口含尘浓度,依新莆京www483net的构造形式、滤料品种、粉尘性质而有所不一样,通常介于1~50mg/m3之间。
It is necessary to lower the concentration of dust in the export than the specified value of the environmental protection laws and regulations and the national health regulations. The dust concentration of the environmental protection dust removal equipment is different from the structure form of the environmental protection dust removal equipment, the filter material variety and the dust property, usually between 1 ~ 50mg/m3.
关于富含铅、镉等有害物质的情况下,请求出口浓度格外低,规划时按不一样的用处及技术特性,选用不一样的新莆京www483net构造及滤料原料。
On the rich in lead, cadmium and other hazardous substances, the request for export concentration is particularly low, according to the different planning and technical characteristics of the use of different environmental protection and dust removal equipment structure and filter material.
七、设备阻力
Seven, equipment resistance
所谓设备阻力是指新莆京www483net进口至出口在运转状态下的全压差。布袋除尘器的压力丢失通常在1000~2000Pa之间,脉冲布袋除尘器压力丢失通常小于1500Pa。设备阻力是风机选型的主要依据,设备运转过程中允许压力丢失有某种变化规模,规划时应思考设备阻力变化余量来断定风机的选型。
The so-called equipment resistance refers to the environmental protection dust removal equipment import to export in the operating state of the full pressure difference. The pressure loss of bag filter is usually between 1000 and 2000Pa, and the pressure loss of pulse bag filter is usually less than 1500Pa. The equipment resistance is the main basis for the selection of the fan, and the pressure loss in the operation of the equipment has some kind of change scale.
八、设备耐压
Eight, equipment pressure
新莆京www483net的耐压是依据技术请求及风机的静压等断定的,有必要按照布袋除尘器正常运用的压力来断定设备的规划耐压。作为通常用处的布袋除尘器,设备耐压为4000~5000Pa,关于长袋脉冲除尘器通常为6000~8000Pa,关于选用以罗茨鼓风机为动力的负压型空气运送设备,除尘器的规划耐压为15~50kPa。
According to the technical requirements and the static pressure of the fan, it is necessary to determine the pressure of the equipment according to the pressure of the normal use of the bag filter. As the dust collector usually use equipment, pressure is 4000 ~ 5000Pa, a long bag pulse filter is usually 6000 ~ 8000Pa, on the selection of negative pressure type air blower to power transport equipment, planning pressure filter is 15 ~ 50kPa.
另外,某些格外如高炉煤气干法脉冲布袋除尘器,其规划耐压请求到达0.3MPa或更高,设备通常均规划为圆形,以满意耐压请求。
In addition, some special such as blast furnace gas dry pulse bag filter, the planning of the pressure to meet the requirements of 0.3MPa or higher, the device is usually planned to round, to meet the requirements of the pressure.
九、清灰压力
Nine, ash cleaning pressure
清灰压力是新莆京www483net规划的主要参数,依据所用紧缩空气压力不一样,分红高压(0.5-0.7MPa)、中压(0.35~0.5MPa)、低压(0.2~0.35MPa)及超低压(0.2MPa以下), 并把脉冲阀依据气包内压力区分为高压阀(直角阀)和低压阀(吞没阀)。
Cleaning pressure is the main parameters of environmental protection equipment planning, in accordance with the compressed air pressure is not the same, dividend pressure (0.5-0.7MPa), medium (0.35 ~ 0.5MPa), low voltage (0.2 ~ 0.35MPa) and ultra low pressure (below 0.2MPa), and the air bag pressure pulse valve based on the area is divided into high pressure valve (right angle low pressure valve and valve) (Tun Meifa).
规划选型高压或低压脉冲阀是按紧缩气体供气条件及除尘技术工况决议,现在小型除尘器运用较多的为高压清灰压力,而长袋脉冲选用较多的为低压清灰压力。
Planning and selection of high or low pressure pulse valve is decided according to the working condition of gas supply and compressed gas dust removal technology, now the small dust collector use more high pressure cleaning pressure, and more for the selection of long bag pulse dust cleaning low pressure.
不一样清灰压力规划选用不一样的喷吹管清灰构造,喷吹管开孔尺度、构造型式、喷吹管与花板的高度尺度等,将直接影响设备清灰功用。
Not the same as the ash blowing pressure planning selection of the same type of blast furnace dust cleaning structure, the size of the blowing pipe, the structure of the type, the height of the nozzle and the height of the board, will directly affect the equipment cleaning function.
脉冲清灰对紧缩空气请求不非常严厉,含尘、含水、含油等目标别离到达ISO8573-1表中三级、五级即可,当紧缩空气质量不合格,喷吹时进入除尘滤袋的气流含油、含水量相对添加,一旦油、水进入滤袋,将贴附阻塞有些过滤面积,致使除尘器阻力加重上升。
Pulse cleaning of the air tight request is not very strict, dust, water and oil etc. target reach ISO8573-1 table three and five, when the tightening of air quality, air oil, water injection into the dust bag is added, once the oil and water into the bag, will be attached some blocking filtration area, resulting in the dust resistance increase rise.
十、清灰办法
Ten, ash cleaning method
(1) 在线清灰和离线清灰。新莆京www483net可选用在线清灰和离线清灰两种办法。在线清灰是指在进行脉冲喷吹时,滤袋仍然进行含尘气体过滤,在线清灰过滤及清灰时对体系波动影响小,但清灰不完全,不能在线维修。
(1) on-line ash removal and off line cleaning. Environmental protection dust removal equipment can be used on-line ash removal and off-line cleaning two ways. Online ash cleaning is that when the pulse injection, the filter bag is still carried out in the dust gas filtration, online cleaning and filtration and dust removal when the impact on the system is small, but the ash is not complete, can not be online maintenance.
离线清灰是指把除尘器内有些红若干个过滤室,每个袋室的净气室上独立装置离线阀、气缸和电磁脉冲阀等紧缩气控制体系,在对每个过滤室进行脉冲清灰喷吹前,经过离线阀首先封闭这个袋室,使该滤室在没有烟气过滤情况下进行清灰,因而离线清灰作用更完全,且能在线维修,缺点是添加离线组织、造价高、清灰时对体系烟气波动有影响等。
Off-line cleaning refers to the dust catcher and some red a plurality of filter chamber, a clean gas chamber, each bag chamber of the valve, cylinder and device independent off-line electromagnetic pulse valve tightening gas control system, for each filter chamber of pulse cleaning injection before and after valve closed the first offline bag room, the in the absence of the filter chamber gas filter case cleaning and off-line cleaning effect is more complete, and can be online maintenance, disadvantage is high cost, organization, adding off-line cleaning effect on the system of flue gas fluctuation.
怎么挑选在线或离线清灰,应视除尘技术及用户条件等很多方面进行综合思考,关于小型且进口粉尘浓度低的除尘器,通常选用在线清灰,反之选用离线;关于大型除尘器通常设计为离线构造并具有离线、在线两种可以切换的清灰功用,当工况条件答应不离线清灰时,可切换为在线清灰,但不管在线或离线清灰,均应具有经过离线阀完成不停机的在线检修功用。
How to choose online or off-line cleaning, should be considered comprehensive thinking dedusting technology and user conditions and so on, esp about small and low dust concentration, usually choose on-line cleaning, otherwise choose Offline; on the large dust collector is usually designed and constructed off-line with offline and online two can switch cleaning the function, when conditions agreed not to off-line cleaning, can be switched to the online cleaning, but whether online or off-line cleaning, should have completed the online maintenance after off-line valve shutdown function.
(2) 管式喷吹和箱式喷吹。管式喷吹是在每排滤袋上方设喷吹管,属有序喷吹,即经过管上的喷嘴向每条滤袋内喷吹清灰气流,喷吹孔径各不一样,确保各条滤袋清灰强度均匀,
(2) pipe injection and box injection. Tube type injection is set up in the top of each row of filter bag nozzle, is an orderly injection, that is, through the nozzle on the tube to each filter bag blowing ash flow, the hole diameter is not the same, to ensure that each filter bag dust intensity uniformity,
关于新莆京www483net管式喷吹构造大大优于箱式喷吹。
On the environmental protection dust removal equipment pipe injection structure is much better than box type injection.
箱式喷吹不设喷吹管,属无序喷吹,清灰气流靠脉冲阀直接喷入上箱体并使之增压,进而将能量传递至该室每条滤袋以完成清灰;箱式脉冲喷吹除尘器中,处于不一样部位的各条滤袋,清灰强度存在较大区别,且通常气耗量较大,滤袋长度受到约束,清灰作用对离线阀的气密性依靠较大,所以箱式喷吹多用于中小型除尘器。
The box without blowing blowing, blowing is disorderly, cleaning air by pulse valve is directly injected into the upper box and the booster, and the energy transfer to the chamber of each bag to complete the cleaning box; pulse jet dust collector, in the different parts of the bag, there is a big difference between cleaning strength, and usually large gas consumption, length of filter bag is constrained, cleaning effect of air tightness of the off-line valve rely on large, so much for small and medium sized box blowing dust remover.
十一、气流上升速度
Eleven, the flow rate of rise
在新莆京www483net内部,滤袋低端含尘气体可以上升的实践速度,即是气流上升速度。气流上升速度的巨细对滤袋被过滤的含尘气体磨损及因脉冲清灰而脱离滤袋的粉尘随气流从头回来除尘布袋表面有主要影响。
In the environmental protection dust removal equipment, the filter bag at the lower end of the dust gas can rise the practice speed, that is, the rising speed of air flow. The magnitude of the rising velocity of the air flow is the main influence of the dust laden gas from the filter bag and the dust from the filter bag from the pulse cleaning.
气流上升速度是新莆京www483net内烟气不应超越的最大速度,到达和超越这个速度,烟气中的颗粒物就会磨坏滤袋或带走粉尘,乃至致使设备运转阻力偏大。
The ascending speed is the maximum speed of environmental protection equipment in flue gas should not exceed the reach and exceed this speed, the flue gas particulate bag or will wear away dust, and the equipment running resistance is too large.
新莆京www483net进行过滤时分为内滤和外滤两种,前者含尘气流由滤袋内部流向外部,后者含尘气流由滤袋外部流向滤袋内部。
Environmental protection dust removal equipment for filtration time for internal and external filter two kinds, the former dust laden air flow from the filter bag inside the external, the latter containing dust air flow from the filter bag to the inside of the filter bag.

 

 

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