JP2008110317A - Feeding device for precoat agent in dry filter type dust collector - Google Patents

Feeding device for precoat agent in dry filter type dust collector Download PDF

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JP2008110317A
JP2008110317A JP2006295766A JP2006295766A JP2008110317A JP 2008110317 A JP2008110317 A JP 2008110317A JP 2006295766 A JP2006295766 A JP 2006295766A JP 2006295766 A JP2006295766 A JP 2006295766A JP 2008110317 A JP2008110317 A JP 2008110317A
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precoat agent
compressed air
dry filter
injection
injection nozzle
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Katsuya Nakayama
勝也 中山
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Sintokogio Ltd
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Sintokogio Ltd
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
    • B01D46/42—Auxiliary equipment or operation thereof
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2273/00—Operation of filters specially adapted for separating dispersed particles from gases or vapours
    • B01D2273/12—Influencing the filter cake during filtration using filter aids

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Filtering Of Dispersed Particles In Gases (AREA)

Abstract

<P>PROBLEM TO BE SOLVED: To provide a device feeding a given amount of a precoat agent to a dry filter with a minimum possible injection amount of compressed air in a feeding device for a precoat agent in a dry filter type dust collector wherein a container containing a powdery precoat agent is disposed on the upstream side of a dry filter, and an injection nozzle is provided above the container injecting compressed air to the precoat agent, and injection of compressed air from the injection nozzle blows up the precoat agent to feed it to the surface of the dry filter. <P>SOLUTION: The injection nozzle has a caliber of 4-10 mm and injects 6-14 L of air in one pulse from one nozzle. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description


本発明は、乾式フィルタ式集塵機におけるプリコート剤（濾過助剤）の供給装置に係り、より詳しくは、乾式フィルタの上流側に粉末状のプリコート剤を収納する収納容器を配設するとともに、この収納容器の上方にはプリコート剤に圧縮空気を噴射する噴射ノズルを設けて、この噴射ノズルからの圧縮空気の噴射によりプリコート剤を舞い上がらせて前記乾式フィルタの表面に供給するようにした集塵機におけるプリコート剤の供給装置に関する。
The present invention relates to a precoat agent (filter aid) supply device in a dry filter type dust collector, and more specifically, a storage container for storing a powdery precoat agent is disposed on the upstream side of a dry filter, and this storage A pre-coating agent in a dust collector in which an injection nozzle for injecting compressed air to the pre-coating agent is provided above the container, and the pre-coating agent is raised by the injection of compressed air from the injection nozzle and supplied to the surface of the dry filter. It is related with the supply apparatus.

従来、ガス清浄装置の一つとして、底部を液溜部としたケーシングの内部を、下部に邪魔板状のエリミネータを備えた隔壁により、ベンチュリースクライドを備えた湿式洗浄室と、乾式フィルタを備えた乾式洗浄室とに区画し、乾式洗浄室の底部には内部に粉末状のプリコート剤を収納する容器を配設するとともに、その上方にはプリコート剤に圧縮空気を噴射する噴射ノズルを設けて、噴射ノズルからの圧縮空気の噴射によりプリコート剤を舞い上がらせて乾式フィルタの表面に供給するようにしたものがある。
特開昭６２−１６３７２３号公報 Conventionally, as one of gas purifiers, the inside of the casing with the bottom as a liquid reservoir is provided with a wet cleaning chamber equipped with a venturi scride and a dry filter by a partition wall provided with a baffle plate-like eliminator at the bottom. Partitioned into a dry cleaning chamber, a container for storing a powdery precoat agent is disposed inside the bottom of the dry cleaning chamber, and an injection nozzle for injecting compressed air into the precoat agent is provided above the container. There is one in which a precoat agent is lifted by a jet of compressed air from a jet nozzle and supplied to the surface of a dry filter.
Japanese Patent Laid-Open No. 62-163723

しかし、このように構成された従来のガス清浄装置では、噴射ノズルからの圧縮空気噴射量が多くなると、圧縮空気の噴射の勢いが大きくなり、圧縮空気が収納容器内のプリコート剤を局部的に吹き抜けて、プリコート剤を十分に供給することができない。また、圧縮空気噴射量が少なくなると、圧縮空気の噴射の勢いがないため、プリコート剤を乾式フィルタに十分に供給できない問題があった。 However, in the conventional gas purifier configured as described above, when the amount of compressed air injected from the injection nozzle increases, the momentum of the compressed air injection increases, and the compressed air locally disposes the precoat agent in the storage container. It blows through and the precoat agent cannot be supplied sufficiently. Further, when the amount of compressed air injection is reduced, there is no momentum of compressed air injection, and thus there is a problem that the precoat agent cannot be sufficiently supplied to the dry filter.

本発明は上記の事情に鑑みてなされたもので、その目的は、可及的に少ない圧縮空気噴射量で所要量のプリコート剤を乾式フィルタに供給できる装置を提供することにある。 The present invention has been made in view of the above circumstances, and an object thereof is to provide an apparatus capable of supplying a required amount of a precoat agent to a dry filter with a compressed air injection amount as small as possible.


上記の問題を解消するために本発明の乾式フィルタ式集塵機におけるプリコート剤の供給装置は、乾式フィルタの上流側に粉末状のプリコート剤を収納する収納容器を配設するとともに、この収納容器の上方にはプリコート剤に圧縮空気を噴射する噴射ノズルを設けて、この噴射ノズルからの圧縮空気の噴射によりプリコート剤を舞い上がらせて前記乾式フィルタの表面に供給するようにした集塵機におけるプリコート剤の供給装置において、前記噴射ノズルは、口径が４〜１０ ｍｍであって１個の噴射ノズルから１回のパルスに噴射する空気量が６〜１４
Ｌであることを特徴とする。
In order to solve the above problem, the precoat agent supply device in the dry filter type dust collector of the present invention has a storage container for storing the powdery precoat agent on the upstream side of the dry filter, and an upper portion of the storage container. Provided with an injection nozzle that injects compressed air into the precoat agent, and the precoat agent is caused to rise by the injection of compressed air from the injection nozzle to be supplied to the surface of the dry filter. The injection nozzle has a diameter of 4 to 10 mm, and the amount of air injected from one injection nozzle to one pulse is 6 to 14
It is characterized by being L.

なお、本発明においては、口径４〜１０
ｍｍの１個の噴射ノズルから１回のパルスに噴射する空気量が８
Ｌであると、より優れた作用効果を奏する。 In the present invention, the diameter is 4 to 10
The amount of air jetted from one jet nozzle of mm per pulse is 8
When it is L, there are more excellent effects.

上記の説明から明らかなように本発明は、乾式フィルタの上流側に粉末状のプリコート剤を収納する収納容器を配設するとともに、この収納容器の上方にはプリコート剤に圧縮空気を噴射する噴射ノズルを設けて、この噴射ノズルからの圧縮空気の噴射によりプリコート剤を舞い上がらせて前記乾式フィルタの表面に供給するようにした集塵機におけるプリコート剤の供給装置において、前記噴射ノズルは、口径が４〜１０ ｍｍであって１個の噴射ノズルから１回のパルスに噴射する空気量が６〜１４
Ｌであるから、可及的に少ない圧縮空気噴射量で所要量のプリコート剤を乾式フィルタに適確に供給できるなどの優れた実用的効果を奏する。 As is apparent from the above description, the present invention has a storage container for storing the powdery precoat agent on the upstream side of the dry filter, and an injection for injecting compressed air to the precoat agent above the storage container. In the precoat agent supply device in the dust collector, in which the nozzle is provided and the precoat agent is swollen and supplied to the surface of the dry filter by injection of compressed air from the injection nozzle, the injection nozzle has a diameter of 4 to 4 The amount of air that is 10 mm and is injected in one pulse from one injection nozzle is 6 to 14
Since it is L, there is an excellent practical effect that a required amount of precoat agent can be appropriately supplied to the dry filter with as little compressed air injection as possible.

次に、本発明を適用した乾式フィルタ式集塵機におけるプリコート剤の供給装置の一実施例について、図１〜図３に基づき詳細に説明する。本乾式フィルタ式集塵機においては、ケーシングの内部が、逆洗装置（図示せず）を配置する排気室（図示せず）と、仕切板（図示せず）により排気室と区分された集塵室（図示せず）からなり、所定個数の乾式フィルタ（図示せず）が、前記仕切板に脱着自在に吊り下げられている。 Next, an embodiment of a precoat agent supply device in a dry filter type dust collector to which the present invention is applied will be described in detail with reference to FIGS. In this dry filter type dust collector, the inside of the casing has an exhaust chamber (not shown) in which a backwash device (not shown) is arranged, and a dust collection chamber separated from the exhaust chamber by a partition plate (not shown). (Not shown), and a predetermined number of dry filters (not shown) are detachably suspended from the partition plate.

そして、前記乾式フィルタの上流側には、プリコート剤の供給装置として、図１に示すように、プリコート剤としての粉末状の炭酸カルシウム１をその上端とほぼ同じ高さまで収納した収納容器２が配設してあり、この収納容器２の上方には、炭酸カルシウム１に圧縮空気を噴射する１個の噴射ノズル３が設けてあり、さらに、噴射ノズル３には、圧力０．５
ＭＰａの圧縮空気を貯留した容量５．１Ｌのエアタンク（図示せず）が連通接続してある。また、前記炭酸カルシウム１は、上面がほぼ平坦であり、かつ、縦１５０
ｍｍ×横３００ ｍｍの広さの上面を有し、さらに、高さが１００ ｍｍである。 As shown in FIG. 1, a storage container 2 storing powdered calcium carbonate 1 as a precoat agent up to almost the same height as its upper end is disposed upstream of the dry filter as a precoat agent supply device. An injection nozzle 3 for injecting compressed air to the calcium carbonate 1 is provided above the storage container 2, and a pressure of 0.5 is applied to the injection nozzle 3.
An air tank (not shown) having a capacity of 5.1 L storing compressed air of MPa is connected in communication. The calcium carbonate 1 has a substantially flat top surface and a length of 150
It has an upper surface with a width of mm x 300 mm and a height of 100 mm.

そこで、上述したプリコート剤の供給装置における噴射ノズル３の口径を４〜１０ ｍｍの範囲で変更するとともに、噴射ノズル３からの圧縮空気をパルス１回当り３秒間、噴射量４〜１７
Ｌの範囲で噴射して、乾式フィルタにプリコート剤を供給し付着させる。こうして、圧縮空気の噴射量を４〜１７Ｌの範囲で変えて噴射ノズル３から噴射し、その時の収納容器２内の炭酸カルシウム１の舞い上がり量（供給量）を測定し、その測定値をグラフで表すと、図２に示すようになる。 Therefore, the diameter of the injection nozzle 3 in the above-described precoat agent supply device is changed within a range of 4 to 10 mm, and the compressed air from the injection nozzle 3 is injected for 3 seconds per pulse for 4 to 17 times.
It sprays in the range of L, a precoat agent is supplied and made to adhere to a dry filter. Thus, the injection amount of compressed air is changed in the range of 4 to 17 L and is injected from the injection nozzle 3, the amount of calcium carbonate 1 rising (supply amount) in the storage container 2 at that time is measured, and the measured value is shown in a graph. This is shown in FIG.

図２からは、次のことが分かる。すなわち、炭酸カルシウム供給量は、圧縮空気の噴射量の増加に伴って増大し、噴射量が約８．７
Ｌのときに、約４１ gとなる。一方、圧縮空気の噴射量を８．７ Ｌよりも多くすると、圧縮空気噴射量に対する炭酸カルシウム供給量の増加が緩やかになることが分かる。この原因としては、圧縮空気の噴射量が約８．７
Ｌよりも増大すると、圧縮空気の噴射の勢いが大きくなり、圧縮空気が収納容器３内のプリコート剤を局部的に吹き抜けて、プリコート剤を十分に供給することができなくなるためと考えられる。 FIG. 2 shows the following. That is, the supply amount of calcium carbonate increases as the injection amount of compressed air increases, and the injection amount is about 8.7.
When L, it is about 41 g. On the other hand, it can be seen that when the amount of compressed air injected is greater than 8.7 L, the increase in the amount of calcium carbonate supplied relative to the amount of compressed air injected becomes moderate. The cause of this is that the injection amount of compressed air is about 8.7.
If it exceeds L, the momentum of the jet of compressed air increases, and it is considered that the compressed air blows through the precoat agent in the storage container 3 locally and cannot sufficiently supply the precoat agent.

ところで、一般にプリコート剤の供給装置では、乾式フィルタの濾過面積１ ｍ２に対するプリコート剤の供給量 ｇ／ｍ２を設計指標として用いている。今、濾過面積１０ ｍ２に対して１時間当り７５ ｇ／ｍ２のプリコート剤を供給するものと考えると、７５
ｇ／ｍ２×１０ ｍ２ / 1 ｈ ＝ ７５０ ｇ／ｈのプリコート剤を供給することになる。 By the way, generally in the precoat agent supply device, the supply amount g / m 2 of the precoat agent with respect to the filtration area 1 m 2 of the dry filter is used as a design index. Assuming that a precoat agent of 75 g / m 2 per hour is supplied to a filtration area of 10 m 2 , 75
It would supply precoat agent of g / m 2 × 10 m 2 /1 h = 750 g / h.

このときの噴射ノズル３による圧縮空気の消費量Ｑ [Ｌ／ｈ]は、次のようにして求めることができる。まず、プリコート剤供給量７５０ ｇ／ｈに対して、１個の噴射ノズル３からのパルス１回の圧縮空気噴射で供給されるプリコート剤量を除算することにより、７５０
ｇ／ｈのプリコート剤を供給するための必要パルス回数[回／ｈ]を求めることができる。次に、必要パルス回数に対して、１個の噴射ノズル３からパルス１回で噴射される空気量を乗算することにより、圧縮空気の消費量Ｑ [Ｌ/ｈ]を求めることができる。 The compressed air consumption Q [L / h] by the injection nozzle 3 at this time can be obtained as follows. First, by dividing the amount of precoat agent supplied by one pulse of compressed air injection from one injection nozzle 3 to 750 g / h of the precoat agent supply amount, 750 g / h is obtained.
The necessary number of pulses [times / h] for supplying the g / h precoat agent can be determined. Next, the consumption amount Q [L / h] of compressed air can be obtained by multiplying the required number of pulses by the amount of air ejected from one ejection nozzle 3 in one pulse.

例えば、図２で示す場合における好適な時のように、噴射ノズル３が圧縮空気を１パルス噴射して、圧縮空気噴射量が約８．７
Ｌ、炭酸カルシウム供給量が約４１ ｇの時、圧縮空気の消費量Ｑ[Ｌ/ｈ]は、下記のようになる。
Ｑ[Ｌ/ｈ]＝（７５０ ［ｇ／ｈ］÷４１ [ｇ／回]）×８．７ [Ｌ／回] ＝１５８[Ｌ/ｈ] For example, as in the preferred time in the case shown in FIG. 2, the injection nozzle 3 injects one pulse of compressed air, and the compressed air injection amount is about 8.7.
When L and calcium carbonate supply amount is about 41 g, the consumption amount Q [L / h] of compressed air is as follows.
Q [L / h] = (750 [g / h] ÷ 41 [g / time]) × 8.7 [L / time] = 158 [L / h]

そこで、図２で示す結果に基づき、７５０ ｇ／ｈの炭酸カルシウムを乾式フィルタに供給したときの圧縮空気の消費量Ｑ [Ｌ／ｈ]を求め、１個の噴射ノズル３からパルス１回で噴射される圧縮空気噴射量との関係をプロットしたものを図３に示す。 Therefore, based on the result shown in FIG. 2, the consumption amount Q [L / h] of compressed air when 750 g / h of calcium carbonate is supplied to the dry filter is obtained, and a single pulse from one injection nozzle 3 is obtained. FIG. 3 shows a plot of the relationship with the compressed air injection amount to be injected.

図３からは次のことが分かる。すなわち、圧縮空気の噴射量が約８．７
Ｌのとき、７５０ ｇ／ｈの炭酸カルシウムを供給したときの圧縮空気の消費量Ｑ [Ｌ/ｈ]は、約１５８ Ｌとなって、最も少ない圧縮空気消費量で炭酸カルシウムを乾式フィルタに供給できる。
圧縮空気の噴射量を約８．７ Ｌよりも多くすると、圧縮空気の噴射の勢いが大きくなり、圧縮空気が収納容器内のプリコート剤を局部的に吹き抜けて、プリコート剤を十分に供給することができなくなるため、その結果として、７５０ ｇ／ｈの炭酸カルシウムを供給したときの圧縮空気消費量は増大することになる。 The following can be seen from FIG. That is, the injection amount of compressed air is about 8.7.
When L, when 750 g / h calcium carbonate is supplied, the compressed air consumption Q [L / h] is about 158 L, and calcium carbonate is supplied to the dry filter with the least compressed air consumption. it can.
If the injection amount of compressed air is more than about 8.7 L, the momentum of injection of compressed air increases, and the compressed air blows through the precoat agent in the storage container locally and supplies the precoat agent sufficiently. As a result, the amount of compressed air consumed when 750 g / h of calcium carbonate is supplied increases.

一方、圧縮空気の噴射量が少なくなると、圧縮空気噴射の勢いがないため、炭酸カルシウムを乾式フィルタに十分に供給できず、７５０ ｇ／ｈの炭酸カルシウムを供給する圧縮空気噴射のパルス回数が増加させる必要があり、結果として圧縮空気消費量が増大する。 On the other hand, when the injection amount of compressed air decreases, there is no momentum of compressed air injection, so calcium carbonate cannot be sufficiently supplied to the dry filter, and the number of compressed air injection pulses for supplying 750 g / h calcium carbonate increases. Resulting in increased compressed air consumption.

なお、上記の実施例では、乾式フィルタ式集塵機は、ケーシングの内部が、逆洗装置（図示せず）を配置する排気室（図示せず）と、仕切板（図示せず）により排気室と区分された集塵室（図示せず）からなり、所定個数の乾式フィルタ（図示せず）が、前記仕切板に脱着自在に吊り下げられた構造のものであるが、これに限定されるものではなく、要は、乾式フィルタの上流側に粉末状のプリコート剤を収納する収納容器を配設するとともに、この収納容器の上方にはプリコート剤に圧縮空気を噴射する噴射ノズルを設けて、この噴射ノズルからの圧縮空気の噴射によりプリコート剤を舞い上がらせて前記乾式フィルタの表面に供給する乾式フィルタ式集塵機ならどんな構造のものでもよい。   In the above embodiment, the dry filter type dust collector includes an exhaust chamber (not shown) in which a backwash device (not shown) is disposed inside the casing, and an exhaust chamber by a partition plate (not shown). It is composed of a divided dust collection chamber (not shown), and has a structure in which a predetermined number of dry filters (not shown) are detachably suspended from the partition plate, but are not limited thereto. Instead, the main point is that a storage container for storing the powdery precoat agent is disposed upstream of the dry filter, and an injection nozzle for injecting compressed air to the precoat agent is provided above the storage container. Any type of dry filter type dust collector may be used as long as the precoat agent is raised by spraying compressed air from the spray nozzle and is supplied to the surface of the dry filter.

本発明を適用したプリコート剤の供給装置の一実施例の一部断面正面図である。It is a partial cross section front view of one Example of the supply apparatus of the precoat agent to which this invention is applied. 圧縮空気の噴射量を４〜１７Ｌの範囲で変えて噴射ノズルから噴射し、そのときの容器内の炭酸カルシウムの供給量を測定し、その測定値を示すグラフである。It is a graph which changes the injection amount of compressed air in the range of 4-17L, injects from an injection nozzle, measures the supply amount of calcium carbonate in the container at that time, and shows the measured value. 図２で示す結果に基づき、７５０［ｇ／ｈ］の炭酸カルシウムを乾式フィルタに供給したときの圧縮空気の消費量[Ｌ／ｈ]を求め、１個の噴射ノズルが圧縮空気を１回のパルスとして３秒間噴射したときの圧縮空気の噴射量との関係を示すグラフである。Based on the results shown in FIG. 2, the consumption [L / h] of compressed air when 750 [g / h] of calcium carbonate is supplied to the dry filter is obtained, and one injection nozzle uses the compressed air once. It is a graph which shows the relationship with the injection amount of compressed air when it injects for 3 seconds as a pulse.

符号の説明Explanation of symbols

３ 噴射ノズル 3 Injection nozzle

Claims (2)

乾式フィルタの上流側に粉末状のプリコート剤を収納する収納容器を配設するとともに、この収納容器の上方にはプリコート剤に圧縮空気を噴射する噴射ノズルを設けて、この噴射ノズルからの圧縮空気の噴射によりプリコート剤を舞い上がらせて前記乾式フィルタの表面に供給するようにした乾式フィルタ式集塵機におけるプリコート剤の供給装置において、
前記噴射ノズルは、口径が４〜１０ ｍｍであって１個の噴射ノズルから１回のパルスに噴射する空気量が６〜１４
Ｌであることを特徴とする乾式フィルタ式集塵機におけるプリコート剤の供給装置。 A storage container for storing the powdery precoat agent is disposed on the upstream side of the dry filter, and an injection nozzle for injecting compressed air to the precoat agent is provided above the storage container, and the compressed air from the injection nozzle is provided. In the precoat agent supply device in the dry filter type dust collector, the precoat agent is swollen by spraying and supplied to the surface of the dry filter.
The injection nozzle has a diameter of 4 to 10 mm, and an air amount of 6 to 14 injected from one injection nozzle in one pulse.
An apparatus for supplying a precoat agent in a dry filter type dust collector, wherein L is L. 前記噴射ノズルから１回のパルスに噴射する空気量が８
Ｌであることを特徴とする請求項１に記載の乾式フィルタ式集塵機におけるプリコート剤の供給装置。
The amount of air ejected in one pulse from the ejection nozzle is 8
The apparatus for supplying a precoat agent in a dry filter type dust collector according to claim 1, wherein L is L.
JP2006295766A 2006-10-31 2006-10-31 Feeding device for precoat agent in dry filter type dust collector Pending JP2008110317A (en)

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62163723A (en) * 1986-01-14 1987-07-20 Shintou Dasutokorekutaa Kk Gas purifier
JPS62126215U (en) * 1986-01-31 1987-08-11
JPH0645616U (en) * 1992-11-30 1994-06-21 アマノ株式会社 Precoating device for filters in dust collectors
JPH09108518A (en) * 1995-10-23 1997-04-28 Shinto Dasutokorekutaa Kk Precoat agent supply apparatus in dust collector

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62163723A (en) * 1986-01-14 1987-07-20 Shintou Dasutokorekutaa Kk Gas purifier
JPS62126215U (en) * 1986-01-31 1987-08-11
JPH0645616U (en) * 1992-11-30 1994-06-21 アマノ株式会社 Precoating device for filters in dust collectors
JPH09108518A (en) * 1995-10-23 1997-04-28 Shinto Dasutokorekutaa Kk Precoat agent supply apparatus in dust collector

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