1.攪拌機(jī)常規(guī)防塵措施

1. Conventional dust prevention measures for mixer

在筒倉頂部和混合主機(jī)上部設(shè)置了過濾除塵裝置，了二樓以上的粉塵溢出問題，關(guān)閉了二樓以上的混合建筑，防止了混合過程中粉塵向外擴(kuò)散。在混凝土罐車的清洗環(huán)節(jié)中，增加了砂分離器和三級沉淀池，回收廢渣和污水的固體成分，了外部排放污染問題。

A filter and dust removal device is installed on the top of the silo and the upper part of the mixing host to solve the problem of dust overflow above the second floor. The mixing building above the second floor is closed to prevent the dust from spreading out during the mixing process. In the cleaning process of concrete tank car, sand separator and three-stage sedimentation tank are added to recover the solid components of waste residue and sewage, so as to solve the problem of external emission pollution.

2.控制攪拌機(jī)揚(yáng)塵的補(bǔ)充措施

2. Supplementary measures for dust control of mixer

在批準(zhǔn)混合站常規(guī)防塵措施的前提下，針對堆場除塵和進(jìn)料過程，應(yīng)增加建房棚、密閉筒倉、密閉輸送帶等措施；增加車輛輪帶泥漿進(jìn)出的自動清洗設(shè)備；堆場區(qū)的地面粉塵和道路粉塵問題，并定期對作業(yè)區(qū)內(nèi)的所有地面道路進(jìn)行硬化和噴灑，即"三封閉、一洗一灑"措施。

On the premise of approving the conventional dust control measures of the mixing station, measures such as building shed, closed silo and closed conveyor belt should be added for the dust control and feeding process of the storage yard; Add automatic cleaning equipment for mud in and out of vehicle wheel belt; Solve the problem of ground dust and road dust in the yard area, and regularly harden and spray all the ground roads in the operation area, namely "three closed, one wash and one spray" measures.
                

3.在常規(guī)措施中很容易被忽視的一種聯(lián)系。

3. A kind of connection which is easy to be ignored in conventional measures.

在實際檢查中，發(fā)現(xiàn)一些實施了上述措施的混凝土攪拌機(jī)，如封、擋、洗等，仍然存在防控死角，影響了防控效果的提高。

In the actual inspection, it is found that some concrete mixers that have implemented the above measures, such as sealing, blocking and washing, still have control dead angle, which affects the improvement of control effect.

(1)混合器的除塵環(huán)節(jié)

(1) Dust removal of mixer

工藝設(shè)計混合機(jī)除塵是集塵為主，常用和常用的兩種被動式布袋除塵、強(qiáng)制過濾芯除塵，要求定期檢查和更換濾芯(布袋)。但是，大多數(shù)攪拌機(jī)的維護(hù)滯后，易受影響的部件在這段時間內(nèi)使用，混合樓三樓積塵量大，混煉廠三樓的粉塵堵塞。這部分空氣中的灰塵通過未封閉的窗戶逸出，使混合建筑成為混合粉塵的污染源。這部分粉塵，由于混合建筑已經(jīng)"封閉"，不易發(fā)現(xiàn)，是目前攪拌機(jī)生產(chǎn)過程中的一個重要粉塵來源。

In the process design, the dust removal of mixer is mainly dust collection, and there are two kinds of commonly used passive bag dust removal and forced filter element dust removal, which require regular inspection and replacement of filter element (bag). However, the maintenance of most mixers lags behind, the easily affected parts are used during this period, the dust accumulation on the third floor of the mixing building is large, and the dust on the third floor of the mixing plant is blocked. This part of the dust in the air escapes through the unclosed windows, which makes the mixed building become the pollution source of mixed dust. This part of dust, because the mixed building has been "closed", is not easy to find, is an important source of dust in the production process of mixer.

(2)供沙環(huán)節(jié)

(2) Sand supply link

將攪拌機(jī)的集料砂從叉車鏟送配料倉傾倒，通常在地面上4米處。叉車需要將沙子和石頭搬到配料倉的漏斗中，在傾倒過程中會產(chǎn)生灰塵?？紤]到這些因素，物料堆的頂部和配料倉庫的頂部需要安裝灑水減塵裝置，以抑 制物料堆場排放產(chǎn)生的灰塵和叉車的裝卸。然而，叉車作業(yè)中的灰塵通常很容易被忽略。

The aggregate sand of the mixer is shoveled from the forklift to the batching bin for dumping, usually 4 meters above the ground. Forklift trucks need to move sand and stones to the hopper of the batching bin, and dust will be generated during dumping. In consideration of these factors, the top of the material stack and the top of the batching warehouse need to be installed with water spraying dust reduction device to suppress the dust emitted from the material yard and the loading and unloading of forklifts. However, the dust in forklift operation is usually easy to be ignored.

(3)散裝作業(yè)中的粉塵往往容易被忽略。

(3) Dust in bulk operation is often ignored.

叉車作業(yè)中的沙石在收料過程中反復(fù)碾壓、飛濺，產(chǎn)生很細(xì)的粉塵，被叉車排氣管吹起。由于叉車區(qū)通常有幾十米到幾百米，叉車上部沒有灑水器，這部分粉塵超出了現(xiàn)有的防治范圍，成為溫室內(nèi)粉塵的主要來源，對于叉車作業(yè)區(qū)的露天混合站來說，叉車作業(yè)中的粉塵問題更加突出。

Sand and gravel in forklift operation are repeatedly rolled and splashed in the process of material collection, resulting in fine dust, which is blown up by forklift exhaust pipe. As the forklift area is usually tens of meters to hundreds of meters, there is no sprinkler on the top of the forklift, this part of the dust is beyond the existing scope of prevention and control, and becomes the main source of dust in the greenhouse. For the open mixing station in the forklift operation area, the dust problem in the forklift operation is more prominent.

做好常規(guī)防塵防塵措施，注意容易忽視的細(xì)節(jié)，有效控制原材料運(yùn)輸、堆放、生產(chǎn)過程運(yùn)輸、拌和、預(yù)混混凝土罐車清洗等環(huán)節(jié)，基本上可以使混凝土攪拌機(jī)的粉塵處于受控狀態(tài)。

The dust of concrete mixer can be controlled basically by taking conventional dust prevention measures, paying attention to the details that are easy to be ignored, and effectively controlling the links of raw material transportation, stacking, production process transportation, mixing, premixed concrete tank car cleaning, etc.

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