布袋除塵器除塵系統(tǒng)按照除塵器和通風(fēng)機(jī)在流程中的相對(duì)位置，可以分為負(fù)壓除塵系統(tǒng)和正壓除塵系統(tǒng)。那布袋除塵器的這兩種系統(tǒng)有什么區(qū)別呢？

The bag filter dust removal system can be divided into negative pressure dust removal system and positive pressure dust removal system according to the relative position of the dust collector and the ventilation fan in the process. What is the difference between these two systems of bag filter?

（1） 布袋除塵器負(fù)壓除塵系統(tǒng)

(1) Bag filter negative pressure dust removal system

負(fù)壓除塵系統(tǒng)中，除塵器設(shè)置在通風(fēng)機(jī)之前（負(fù)壓段或吸人段）。其特點(diǎn)如下所述：

In the negative pressure dust removal system, the dust collector is set before the ventilation fan (negative pressure section or suction section). Its characteristics are as follows:

① 由于除塵器設(shè)置在通風(fēng)機(jī)之前，流過(guò)通風(fēng)機(jī)的氣體已經(jīng)過(guò)除塵，含塵濃度低，通風(fēng)機(jī)受磨損大大減低，運(yùn)行壽命長(zhǎng)，處理初濃度高的含塵氣體時(shí)，一般采用負(fù)壓除塵系統(tǒng)。

① Due to the fact that the dust collector is installed before the ventilation fan, the gas flowing through the ventilation fan has already undergone dust removal, resulting in a low dust concentration and greatly reduced wear and tear on the ventilation fan. With a long operating life, a negative pressure dust removal system is generally used when dealing with high initial concentration dust containing gases.

② 除塵器和管道處于通風(fēng)機(jī)的負(fù)壓段，容易吸入空氣，產(chǎn)生漏風(fēng)。負(fù)壓除塵系統(tǒng)的漏風(fēng)率為5%～10%，加大了通風(fēng)機(jī)的風(fēng)量，增加了電耗。

② The dust collector and pipeline are located in the negative pressure section of the ventilation fan, which is prone to inhaling air and causing air leakage. The air leakage rate of the negative pressure dust removal system is 5% to 10%, which increases the air volume of the ventilation fan and increases power consumption.

③ 在負(fù)壓除塵系統(tǒng)設(shè)計(jì)中應(yīng)采用措施盡可能減少除塵器和管道的漏風(fēng)，以保除塵器的良好運(yùn)行。

③ In the design of negative pressure dust removal systems, measures should be taken to minimize air leakage from the dust collector and pipelines as much as possible to ensure the good operation of the dust collector.

（2） 布袋除塵器正壓除塵系統(tǒng)

(2) Positive pressure dust removal system of bag filter

正壓除塵系統(tǒng)中，除塵器設(shè)置在通風(fēng)機(jī)之后（正壓段或壓出段）。其特點(diǎn)如下所述：

In a positive pressure dust removal system, the dust collector is installed after the ventilation fan (positive pressure section or extrusion section). Its characteristics are as follows:

① 由于流過(guò)通風(fēng)機(jī)的含塵氣體未經(jīng)除塵器凈化，通風(fēng)機(jī)的葉輪和機(jī)殼易遭粉塵磨損。因此，正壓除塵系統(tǒng)只適于在氣體含塵濃度3g/m3以下、粉塵磨琢性弱、粉塵粒度小的條件下使用。

① Due to the untreated dust containing gas flowing through the ventilation fan, the impeller and casing of the fan are susceptible to dust abrasion. Therefore, the positive pressure dust removal system is only suitable for use under conditions where the gas dust concentration is below 3g/m3, the dust abrasion is weak, and the dust particle size is small.

② 除塵器處于通風(fēng)機(jī)的正壓段．不必考慮除塵器的漏風(fēng)附加率，通風(fēng)機(jī)電耗較低。

② The dust collector is located in the positive pressure section of the ventilation fan. There is no need to consider the additional air leakage rate of the dust collector, and the power consumption of the ventilation fan is relatively low.

③ 除塵器的圍護(hù)結(jié)構(gòu)簡(jiǎn)單，如正壓袋式除塵器的圍護(hù)結(jié)構(gòu)不需要密封，只要防雨即可；設(shè)備制造，安裝簡(jiǎn)便，造價(jià)低。

③ The enclosure structure of a dust collector is simple, such as the enclosure structure of a positive pressure bag filter, which does not need to be sealed and only needs to be rainproof; Equipment manufacturing, easy installation, and low cost.

④ 布袋除塵器正壓除塵系統(tǒng)中，凈化后的氣體直接由除塵器排入大氣，可不設(shè)煙囪；除塵器有一定的消聲作用，通風(fēng)機(jī)出口側(cè)可不設(shè)消聲器；有利節(jié)約除塵系統(tǒng)占地和初期投資。

④ In the positive pressure dust removal system of the bag filter, the purified gas is directly discharged into the atmosphere through the filter, and there is no need to install a chimney; The dust collector has a certain noise reduction effect, and there is no need to install a muffler on the outlet side of the ventilation fan; Beneficial for saving dust removal system land and initial investment.

單機(jī)除塵器設(shè)備使用正壓或者負(fù)壓的區(qū)別

The difference between using positive pressure or negative pressure in a single dust collector equipment

購(gòu)買(mǎi)單機(jī)除塵器設(shè)備或者其他類(lèi)型的袋式除塵器設(shè)備的時(shí)候，很多的朋友都會(huì)問(wèn)：你們采用的是正壓方式還是負(fù)壓的方式？其實(shí)除塵器設(shè)備無(wú)論使用正壓和負(fù)壓都是沒(méi)有問(wèn)題的。不過(guò)是在條件允許的情況下進(jìn)行合理設(shè)計(jì)就好。

When purchasing standalone dust collector equipment or other types of bag filter equipment, many friends will ask: Do you use positive pressure or negative pressure? In fact, the dust collector equipment has no problem using both positive and negative pressure. Just design it reasonably if conditions permit.

下面詳細(xì)的給您介紹下關(guān)于單機(jī)除塵器設(shè)備使用正壓或者負(fù)壓的區(qū)別？工作條件下都有哪些的好處和壞處？

Below is a detailed introduction to the difference between using positive pressure or negative pressure in a single dust collector equipment? What are the benefits and drawbacks of working conditions?

1、單機(jī)除塵器在凈化粉塵的時(shí)候含塵氣流進(jìn)入濾袋的方向有向外式和向內(nèi)式。前者含塵氣流首先進(jìn)入濾袋內(nèi)部，由內(nèi)向外過(guò)濾，粉塵積于濾袋內(nèi)表面。

1. When purifying dust, the direction of the dusty airflow entering the filter bag in a single dust collector can be outward or inward. The former dusty airflow first enters the interior of the filter bag and is filtered from the inside out, causing dust to accumulate on the inner surface of the filter bag.

向外式的濾袋外部為干凈氣體側(cè)，便于檢查和換袋。

The outward facing filter bag has a clean gas side for easy inspection and bag replacement.

向內(nèi)式的含塵氣流由濾袋外部通過(guò)濾料進(jìn)入濾袋內(nèi)，凈化后的氣體由袋內(nèi)排出。向內(nèi)式適用于脈沖噴吹和高壓氣流反吹的布袋式除塵器。

The inward type dusty airflow enters the filter bag through the filter material from the outside, and the purified gas is discharged from the inside of the bag. Inward type is suitable for bag type dust collectors with pulse blowing and high-pressure airflow back blowing.

2、負(fù)壓的除塵系統(tǒng)中風(fēng)機(jī)置于除塵器的后面，使除塵器處于負(fù)壓，含塵氣流被吸入除塵器中進(jìn)行凈化。這種方式的特點(diǎn)是進(jìn)入風(fēng)機(jī)的氣流是已經(jīng)凈化的氣流可以防止風(fēng)機(jī)被磨損。

2. The fan in the negative pressure dust removal system is placed behind the dust collector to maintain negative pressure, and the dusty airflow is sucked into the dust collector for purification. The characteristic of this method is that the airflow entering the fan is already purified, which can prevent the fan from being worn out.

正壓式的除塵系統(tǒng)中風(fēng)機(jī)置于除塵器的前面，除塵器在正壓下工作。正壓式的特點(diǎn)是管道布置緊湊，對(duì)外殼結(jié)構(gòu)的強(qiáng)度要求不高，但風(fēng)機(jī)易磨損，不適用于濃度高，顆粒粗，硬度大，磨損性強(qiáng)的粉塵。

The fan in the positive pressure dust removal system is placed in front of the dust collector, and the dust collector works under positive pressure. The characteristic of positive pressure is that the pipeline layout is compact, and the strength requirements for the shell structure are not high. However, the fan is prone to wear and is not suitable for dust with high concentration, coarse particles, high hardness, and strong wear.

單機(jī)除塵器正壓和負(fù)壓使用的區(qū)別濾袋形狀有圓袋和扁袋。前者結(jié)構(gòu)簡(jiǎn)單，便于清灰。后者占空間小，單位體積內(nèi)所布置的過(guò)濾面積大;但結(jié)構(gòu)和清灰較復(fù)雜，換袋困難，濾袋與骨架的磨損較大。因此工業(yè)中大多采用圓袋。

The difference between positive pressure and negative pressure in a single dust collector is that the filter bag shapes include round bags and flat bags. The former has a simple structure and is easy to clean. The latter occupies less space and has a larger filtering area arranged per unit volume; But the structure and dust removal are complex, making it difficult to replace the bag, and the wear of the filter bag and the skeleton is significant. Therefore, circular bags are mostly used in industry.

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