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近日，河北威美環(huán)保中標(biāo)湖北吉星化工集團(tuán)有限責(zé)任公司2萬(wàn)噸/年次磷酸鈉技改項(xiàng)目濕式靜電除霧器項(xiàng)目，以下網(wǎng)站公布的中標(biāo)結(jié)果：

河北威美環(huán)保中標(biāo)湖北吉星化工集團(tuán)有限責(zé)任公司2萬(wàn)噸/年次磷酸鈉濕式靜電除霧器技改項(xiàng)目

此次發(fā)貨的濕電是為河北一家集化肥、化工于一體的綜合性化工企業(yè)定制。該套濕式電除塵器應(yīng)用于該公司2萬(wàn)噸氰尿酸項(xiàng)目。河北威美負(fù)責(zé)高壓靜電除霧器的本體及其輔助設(shè)備系統(tǒng)的功能設(shè)計(jì)、制造、供貨、安裝及調(diào)試，該設(shè)備煙氣量25000m³/h，煙氣溫度 ≤60℃ ，設(shè)計(jì)流速0.5m/s。

以下是氰尿酸煙氣深度凈化高壓靜電濕式電除塵器發(fā)貨現(xiàn)場(chǎng)圖，

氰尿酸煙氣深度凈化高壓靜電濕式除塵器陽(yáng)極發(fā)貨

煙氣深度凈化高壓靜電濕式除塵器殼體及配件發(fā)貨

    伴隨著秋冬供暖季的到來(lái)，對(duì)于大氣環(huán)境治理工作而言是一個(gè)大的挑戰(zhàn)，而鍋爐治理是大氣污染治理的重要方面，是改善環(huán)境質(zhì)量的重大民生工程。生物質(zhì)鍋爐以成型的生物質(zhì)顆粒為燃料，是一種具有壓力容器資質(zhì)的鍋爐，生物質(zhì)鍋爐直接燃用生物質(zhì)燃料（樹(shù)木、秸稈、鋸末、稻殼、蔗渣等）的鍋爐，它所使用的燃燒設(shè)備其排放物燃燒產(chǎn)生的灰份約占燃料的1.5%左右，相比傳統(tǒng)燃煤方式來(lái)說(shuō)，其污染排放量的降低度可以說(shuō)是有幾倍之高。與此同時(shí)，其燃燒所用的材料也為可降解的木料、玉米桿、麥秸稈等天然物質(zhì)，不僅能夠防止直接就地燃燒所造成的土地破壞，*大限度的能夠使其資源利用的恰到好處。另外，為了方便排灰，生物質(zhì)鍋爐的后部一般都布置有螺旋出渣機(jī)，可以實(shí)現(xiàn)連續(xù)清灰的工作。

天津生物質(zhì)成型燃料鍋爐大氣污染物排放濃度限值

河北威美生物質(zhì)鍋爐*低排放案例

使用濕式靜電除塵器實(shí)現(xiàn)糖廠生物質(zhì)鍋爐*低排放效果

第二臺(tái)使用濕式靜電除塵器實(shí)現(xiàn)糖廠生物質(zhì)鍋爐*低排放效果

35t+45t糖廠鍋爐煙氣濕式靜電除塵器投入使用，煙氣量分別為11萬(wàn)氣量和14萬(wàn)氣量，進(jìn)氣方式來(lái)下進(jìn)上出，以下是來(lái)自現(xiàn)場(chǎng)的效果圖

糖廠鍋爐煙氣濕式電除塵器使用效果圖

Conductive FRP wet electrostatic precipitators are generally applied to flue gas purification in the environmental protection industry, as well as gas purification, mist elimination and dust removal in industries such as metallurgy, chemical engineering and petroleum.

Conductive FRP wet electrostatic precipitators boast the following features:

1. Excellent electrical conductivity, and high efficiency in mist elimination and dust removal.
2. Strong corrosion resistance, good flame retardancy, long service life, as well as safe and reliable performance.
3. Compact and reasonable structure, high strength and light equipment weight.

Features of Conductive FRP Wet Electrostatic Precipitators

     河北威美環(huán)保設(shè)備科技有限公司，是專業(yè)從事工業(yè)大氣污染處理等領(lǐng)域的技術(shù)研究、產(chǎn)品生產(chǎn)和系統(tǒng)應(yīng)用工程服務(wù)為一體的高新技術(shù)環(huán)保公司。主要從事電力、化工、冶金、礦山、建材、鑄造、煙草、鍋爐、瀝青水泥機(jī)械、糧食、機(jī)械加工、水泥等行業(yè)煙氣除塵、除灰、除霧等環(huán)保工程技術(shù)開(kāi)發(fā)、咨詢；環(huán)保新設(shè)備、新工藝、新技術(shù)開(kāi)發(fā)、推廣及相關(guān)技術(shù)服務(wù)；環(huán)保設(shè)備的制作、安裝、調(diào)試、技術(shù)培訓(xùn)一條龍服務(wù)。

    濕式靜電除塵設(shè)備作為一種先進(jìn)的煙氣治理技術(shù)，濕式電除塵技術(shù)在歐洲、美國(guó)、日本等國(guó)家已得到廣泛應(yīng)用且效果良好。國(guó)內(nèi)企業(yè)自主開(kāi)發(fā)的濕式電除塵技術(shù)，已在燃煤電廠取得成功應(yīng)用。上海長(zhǎng)興島第二發(fā)電廠燃煤鍋爐濕法脫硫后改造工程配套電除霧器，出口粉塵排放濃度僅為6.1mg/m3，引起業(yè)界高度關(guān)注。我國(guó)也有環(huán)保企業(yè)引進(jìn)國(guó)外的濕式電除塵技術(shù)，并有多家電廠簽訂濕式電除塵器合同，*大配套機(jī)組為1000MW。相信隨著濕式電除塵技術(shù)在我國(guó)的推廣應(yīng)用，其必將成為滿足*低排放、治理PM2.5的有力武器。

    河北威美環(huán)保是河北省知名的生產(chǎn)濕式除塵設(shè)備的制造企業(yè)，公司主營(yíng)濕式電除塵器整套設(shè)備及電除霧設(shè)備配件，產(chǎn)品有陽(yáng)極管、電除霧器、濕式電除塵器、電捕焦油器及各種材質(zhì)陰極線等濕電配件。目前已有多臺(tái)濕電產(chǎn)品運(yùn)行在建材、化工、金屬冶煉、鍋爐、煤電行業(yè)（后附*低排放效果圖）,  公司技術(shù)力量雄厚，不但擁有一支專業(yè)、高效的技術(shù)團(tuán)隊(duì)，而且始終堅(jiān)持技術(shù)開(kāi)發(fā)和品牌建設(shè)工作互相促進(jìn)、共同發(fā)展的原則！以穩(wěn)定質(zhì)優(yōu)的產(chǎn)品打造提升公司的品牌形象，以良好的品牌效應(yīng)促進(jìn)產(chǎn)品技術(shù)的開(kāi)發(fā)，目前，我公司已擁有多項(xiàng)新技術(shù)成果，公司設(shè)備遍布全國(guó)各省、市、自治區(qū)，在電力、建材、冶金、輕工、化工、硫酸等眾多行業(yè)中得到廣泛應(yīng)用，并享有良好的市場(chǎng)信譽(yù)！

河北威美環(huán)保設(shè)備科技有限公司廠區(qū)

威美濕式靜電除塵器陽(yáng)極管束、殼體及配件生產(chǎn)現(xiàn)場(chǎng)

河北威美濕式電除塵器現(xiàn)場(chǎng)運(yùn)行效果

    陽(yáng)極管按材料分為：導(dǎo)電玻璃鋼陽(yáng)極管，不銹鋼（304、316L、2205）陽(yáng)極管；

    玻璃鋼陽(yáng)極管結(jié)構(gòu)形式為內(nèi)切圓360mm正6邊形，壁厚3mm，長(zhǎng)度為：6000mm；

    玻璃鋼陽(yáng)極管介紹:http://www.tooyoungcns.com/product/product89.html

    不銹鋼陽(yáng)極管結(jié)構(gòu)形式為內(nèi)切圓360mm正6邊形，壁厚1.5mm，長(zhǎng)度為：6000mm；

    不銹鋼陽(yáng)極管:http://www.tooyoungcns.com/product/product88.html

    把多根陽(yáng)極管組合，形蜂窩狀沉淀電極。組裝并加強(qiáng)后，作為一個(gè)整體，與上下花板連接，陽(yáng)極管制作嚴(yán)格按國(guó)家相關(guān)以及行業(yè)標(biāo)準(zhǔn)要求執(zhí)行，合格沉淀管內(nèi)表面應(yīng)平整順滑；

    玻璃鋼陽(yáng)極管內(nèi)表面含有碳纖維及阻燃劑的耐磨阻燃導(dǎo)電層，壁厚均勻并且管端面和軸線成直角、無(wú)毛刺，外觀無(wú)任何形式的缺陷，主要導(dǎo)電方式是通過(guò)碳纖維粘和水膜導(dǎo)電；。

    玻璃鋼陽(yáng)極管采用新技術(shù)導(dǎo)電玻璃鋼，為CFRP導(dǎo)電碳纖維強(qiáng)化復(fù)合材料，由玻璃纖維、石墨粉、樹(shù)脂材料以及各種添加劑通過(guò)模壓、纏繞、手糊成型、以及防紫外線 防老化等工藝制成。內(nèi)表面平整光潔易沖洗，阻燃以及抗腐蝕性強(qiáng)，可以抗各種酸（硫酸、鹽酸、氫氟酸等）和強(qiáng)堿的腐蝕。其導(dǎo)電性、機(jī)械強(qiáng)度、耐溫性能以及抗老化性完全滿足陽(yáng)極材料的使用要求由陽(yáng)極管組成的管束構(gòu)成濕式靜電除塵器的陽(yáng)極系統(tǒng)。

The wet electrostatic precipitator is equipped with an intermittent spray method. Spraying plays a remarkably significant and effective role in improving the efficiency of the wet electrostatic precipitator, as well as maintaining the cleanliness, long-term stability and safe operation of the electric field. It is especially crucial for the safe operation of the wet electrostatic precipitator and the initial commissioning phase. All users should attach great importance to this and strictly follow the relevant requirements. For intermittent spraying, impurity-free weakly acidic circulating water or clean water can be selected.
 

Schematic Diagram of Spraying for Wet Electrostatic Precipitator

1. Clean up impurities in the spray circulation water tank, and conduct water filling and leakage testing.
2. Open the inlet valve of the circulating water pump, start the circulating pump and flush the spray pipeline.
3. After the pipeline flushing is completed, stop the circulating water pump and install the spray nozzles.
4. Start the circulating water pump, open the pump outlet valve, and control the pressure of the wet electrostatic precipitator flushing water pipeline between 0.3 and 0.4 Mpa.
5. Manually adjust the wet electrostatic precipitator intermittent spraying device to confirm that the pressure is normal, there is no leakage in the pipelines inside and outside the electric field, the spraying is uniform, and there are no obvious dead zones for spraying and washing in the electric field.
6. Switch the intermittent spraying to automatic interlock control on the DCS in the control room, and verify that the actions are accurate, reliable, in-place and flexible.
7. Stop the circulating water pump, close the pump inlet valve, and the commissioning of the spray system is completed.

Anode tubes constitute the anode system of wet electrostatic precipitators. The fiberglass reinforced plastic (FRP) anode tubes produced by Hebei Weimei Environmental Protection Co., Ltd. boast the advantages of strong corrosion resistance, excellent electrical conductivity, high efficiency in dust and mist removal, light weight, high strength, and compact structure. The honeycomb structure enables both the inner and outer surfaces of each tube to serve as precipitation surfaces. They also feature good flame retardancy, with the oxygen index of the material reaching over 32. Their service life can be as long as 20 years.

FRP Anode Tubes

Layered Structure and Fabrication of FRP Anode Tubes

The layered structure of the FRP used for conductive FRP anode tubes is, from the inside to the outside, as follows: 1 layer of carbon fiber mat, 2 layers of chopped fiber strip mats, 3 layers of glass fiber cloth with a thickness of 0.4mm, and 1 layer of glass surface mat. Vinyl resin is adopted as the base resin, which contains high-carbon-content (>98%) graphite, flame retardants and other additives. The conductive FRP made of this material has the advantages of high strength, good rigidity, excellent electrical conductivity and flame retardancy.

Characteristics of FRP Anode Tubes

1. Light Weight and High Strength
   The FRP anode tubes are light in weight yet high in strength, with fixed external dimensions. Unlike lead precipitation electrodes that tend to deform after long-term use, these tubes avoid such deformation issues, thereby extending the service life of the equipment.
2. Compact Structure
   The honeycomb structure allows both the inner and outer surfaces of each tube to act as precipitation surfaces, with no dead zones in between. Therefore, for treating flue gas of the same scale, the equipment has a smaller volume and occupies less floor space.
3. Strong Corrosion Resistance
   They can resist corrosion by various dilute acids, alkalis, salts and other media.
4. Good Flame Retardancy
   Tested by national professional testing institutions, the oxygen index of the material can be below 28%. Thus, even if arcing occurs inside the electric field, it will not ignite the precipitation components.

Anode System of Wet Electrostatic Precipitator

During the operation of a wet electrostatic precipitator, damage and cracking of insulating porcelain insulators often occur, which will lead to failure to apply high external voltage or transmit power. What are the causes of this situation?

1. Condensation Leakage: During the operation of the dust collection chamber, the temperature drops and SO? condenses on the surface, which often causes leakage. Therefore, the equipment must be operated at an appropriate temperature (300℃ at the outlet).
2. Damage During Installation: The installation work shall be carried out with caution, and care must be taken to avoid collision or improper installation.

Replacement of Insulating Porcelain Insulators for Wet Electrostatic Precipitator

Phenomenon: Excessively frequent flashover, accompanied by decreased dust collection efficiency

Causes:
(1) Discharge occurs outside the electric field of the electrostatic demister, such as discharge at the isolating switch, high-voltage cable, damping resistor, etc.
(2) The spark rate of the electric control cabinet is not properly adjusted.
(3) Fluctuations in operating conditions lead to drastic changes in flue gas parameters.
(4) Improper adjustment of the distance between cathode wires and anode plates.

Troubleshooting:

(1) Eliminate the discharge at the faulty parts.
(2) Adjust the spark rate potentiometer and switch the device to automatic mode.
(3) Notify the chief operator to optimize process conditions and improve flue gas parameters.
(4) Adjust the distance between cathode wires and anode plates to the standard range.

Phenomenon:
 
Low primary and secondary voltage; low secondary current. The primary current is much higher than normal, rises rapidly, and is disproportionate to the secondary current rise.Cause: Turn-to-turn short circuit occurs in the rectifier transformer, or the silicon stack is open-circuited or broken down.

Troubleshooting: 

Conduct an open-circuit test. If current is detected on the primary side, it indicates internal component damage, magnetic bias or short circuit in the transformer. Lift the transformer core for maintenance and replace the damaged components.

Phenomenon: 

Low primary and secondary voltage; low secondary current. The primary current is extremely high, rises disproportionately to the secondary current, surges and changes abruptly. This may blow the quick fuse, and the transformer emits obvious abnormal noise.

Causes:

(1) Short circuit fault in the low-voltage winding of the rectifier transformer;
(2) Insulation damage to the rectifier transformer core (including through-core bolts), resulting in severe eddy current.

Troubleshooting:

(1) Replace the low-voltage winding;
(2) Re-insulate the transformer core.

Phenomenon: 

When primary and secondary currents reach rated values, the primary voltage stays between 280–330V, the secondary voltage ranges from 40–50kV, and no flashover occurs.Cause: Severe leakage at the high-voltage cable and its terminal.

Troubleshooting: Reconstruct the high-voltage cable and its terminal.

Phenomenon: 

Frequent frequency conversion of the alkali supply pump, large fluctuation in rotation speed, and drastic changes in the pH value of the circulating water tank.Cause: Clogging of the neutralization pipe in the circulating water system by foreign matters.

Troubleshooting: 

Clean the foreign matters inside the anode tubes of the electrostatic demister.

Phenomenon: 

Gradual decrease in circulating water flow, accompanied by a progressive drop in dust collection efficiency.

Cause:

Scaling on the pipelines of the electrostatic demister and the circulating water pump.Troubleshooting: Appropriately reduce the pH value of the circulating water tank to 5.2 during operation.

Wet Electrostatic Precipitator (WESP)

       目前，國(guó)內(nèi)燃煤電廠鍋爐尾部現(xiàn)有的煙氣治理流程一般是有脫銷、除塵、脫硫組成，煙氣經(jīng)濕法脫硫后直接進(jìn)入煙囪。其中脫硝脫除NOX，濕式靜電除塵器脫除煙塵，濕法脫硫脫除SOX。然而脫銷設(shè)備工作時(shí)，在催化劑的作用下，伴有SO2轉(zhuǎn)化為SO3的副反應(yīng)，使煙氣中SO3的含量大大增加。作為脫銷還原劑注入煙氣中的NH3，在實(shí)際運(yùn)行中會(huì)產(chǎn)生部分逃逸。而濕法脫硫，通過(guò)脫硫漿液的洗滌作用可脫除煙氣中的部分顆粒物；由于存在脫硫漿液霧化夾帶、脫硫產(chǎn)物結(jié)晶析出，也會(huì)形成PM2.5。

       脫硫塔對(duì)SO3的去除率很低，進(jìn)入煙囪的濕煙氣處于酸露點(diǎn)以下，其冷凝液對(duì)煙囪造成腐蝕。因?yàn)楝F(xiàn)有濕法脫硫系統(tǒng)去除PM2.5細(xì)顆粒物的能力很弱，對(duì)汞和SO3氣溶膠等的脫除也有限，從而導(dǎo)致煙囪風(fēng)向的下游經(jīng)常出現(xiàn)"酸雨"、"石膏雨"等現(xiàn)象，或是有煙尾的"藍(lán)煙"現(xiàn)象。國(guó)務(wù)院在《重點(diǎn)區(qū)域大氣污染防治"十二五"規(guī)劃》的批復(fù)意見(jiàn)中明確指出：到2015年，重點(diǎn)區(qū)域工業(yè)煙粉塵排放量下降10%；可吸入顆粒物（PM10）、細(xì)顆粒物（PM2.5）年均濃度分別下降10%、5%。其中，京津冀、長(zhǎng)三角、珠三角等13個(gè)重點(diǎn)區(qū)域?qū)M2.5細(xì)顆粒物納入考核指標(biāo)，細(xì)顆粒物年均濃度下降6%；上述區(qū)域復(fù)合型大氣污染要得到有效控制，酸雨、霧霾和光化學(xué)煙霧污染明顯減少。

       濕式靜電除塵器在目前的煙氣治理工藝流程中，濕法脫硫之后沒(méi)有對(duì)脫硫工藝生產(chǎn)的細(xì)顆粒物進(jìn)行控制，還有煙塵、PM2.5、SO3、汞及重金屬等多種污染物直接從煙囪排出，處于一種自由開(kāi)放狀態(tài)。因此，在濕法脫硫裝置之后，需要再有一道把關(guān)設(shè)備，濕式電除塵器成為煙氣治理的理想選擇。

       濕式靜電除塵器能夠解決濕法脫硫帶來(lái)的石膏雨、藍(lán)煙問(wèn)題，緩解下游煙道、煙囪的腐蝕，節(jié)約防腐成本。其性能穩(wěn)定可靠，可有效收集微細(xì)顆粒物（PM2.5粉塵、SO3酸霧、氣溶膠）、重金屬（Hg、As、Se、Pb、Cr）、有機(jī)污染物（多環(huán)芳烴、二惡英）等，煙塵排放可達(dá)10mg/m3甚至5mg/m3以下，實(shí)現(xiàn)低排放，解決煙囪排放問(wèn)題，達(dá)到"一勞永逸"的效果。 在目前的煙氣治理工藝流程中，濕法脫硫之后沒(méi)有對(duì)脫硫工藝生產(chǎn)的細(xì)顆粒物進(jìn)行控制，還有煙塵、PM2.5、SO3、汞及重金屬等多種污染物直接從煙囪排出，處于一種自由開(kāi)放狀態(tài)。因此，在濕法脫硫裝置之后，需要再有一道把關(guān)設(shè)備，濕式電除塵器可成為末端處理設(shè)備。 由于濕式電除塵器采用水流沖洗，沒(méi)有振打裝置，不會(huì)產(chǎn)生二次揚(yáng)塵。根據(jù)國(guó)外相關(guān)文獻(xiàn)，濕式電除塵器對(duì)霧酸、有毒重金屬以及PM10，尤其是PM2.5的微細(xì)粉塵有良好的脫除效果。所以，可以使用濕式電除塵器來(lái)控制電廠的SO3酸霧，同時(shí)還具有聯(lián)合脫除多種污染物的功能。

       濕式電除塵器具有除塵效率高、壓力損失小、操作簡(jiǎn)單、能耗小、無(wú)運(yùn)動(dòng)部件、無(wú)二次揚(yáng)塵、維護(hù)費(fèi)用低、生產(chǎn)停工期短、可工作于煙氣露點(diǎn)溫度以下、由于結(jié)構(gòu)緊湊而可與其他煙氣治理設(shè)備相互結(jié)合、設(shè)計(jì)形式多樣化等優(yōu)點(diǎn)。濕式電除塵器的工作原理與干式電除塵器類似，在濕式電除塵器中，水霧使粉塵凝并，并與粉塵在電場(chǎng)中一起荷電，一起被收集，收集到極板上的水霧形成水膜，水膜使極板清灰，保持極板潔凈。同時(shí)由于煙氣溫度降低及含濕度增高，粉塵比電阻大幅度下降，因此濕式電除塵器的工作狀態(tài)非常穩(wěn)定。