JP3297229B2 - Backwashing device for dust remover - Google Patents
Backwashing device for dust removerInfo
- Publication number
- JP3297229B2 JP3297229B2 JP30471094A JP30471094A JP3297229B2 JP 3297229 B2 JP3297229 B2 JP 3297229B2 JP 30471094 A JP30471094 A JP 30471094A JP 30471094 A JP30471094 A JP 30471094A JP 3297229 B2 JP3297229 B2 JP 3297229B2
- Authority
- JP
- Japan
- Prior art keywords
- pressure
- backwashing
- filter element
- backwash
- dust remover
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Landscapes
- Filtering Of Dispersed Particles In Gases (AREA)
Description
【0001】[0001]
【産業上の利用分野】本発明は、ガス化装置や加圧流動
床燃焼炉等のガス脱塵器に適用される逆洗装置に関す
る。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a backwashing device applied to a gas remover such as a gasifier or a pressurized fluidized bed combustion furnace.
【0002】[0002]
【従来の技術】図4に従来の脱塵器用逆洗装置の例を示
している。図4において、脱塵器本体1には内部に円筒
型フィルタエレメント2が内蔵されている。図示してい
ない加圧流動床燃焼炉から供給される含塵ガス3はフィ
ルタエレメント2内に流れ、フィルタエレメント2の内
面でダストを濾過され外面に接続された出口配管4から
圧力調整弁5を介してガスタービン6へ供給される。2. Description of the Related Art FIG. 4 shows an example of a conventional backwashing device for a dust remover. In FIG. 4, a cylindrical filter element 2 is built in a dust remover main body 1. The dust-containing gas 3 supplied from the pressurized fluidized bed combustion furnace (not shown) flows into the filter element 2, the dust is filtered on the inner surface of the filter element 2, and the pressure regulating valve 5 is supplied from the outlet pipe 4 connected to the outer surface. The gas is supplied to the gas turbine 6 via the gas turbine 6.
【0003】フィルタエレメント2内面に付着したダス
トは運転を続けていくと成長してフィルタエレメント2
内外面の圧損が大きくなるので、内外面差圧を差圧計7
で監視して定期的に逆洗を行ってフィルタエレメント2
の除塵を行っている。[0003] The dust adhering to the inner surface of the filter element 2 grows as the operation is continued and grows.
Since the pressure loss on the inner and outer surfaces increases, the differential pressure between the inner and outer surfaces is
Monitoring and periodically backwash the filter element 2
Dust removal.
【0004】逆洗ライン8は出口配管4の途中に逆洗ノ
ズル9と逆洗弁10を設け逆洗弁10は差圧計7と連動
させている。すなわち、フィルタエレメント2の差圧が
大になったら逆洗弁10を0.3〜0.5秒程度開きフ
ィルタエレメント2に逆方向の差圧を発生させて除塵す
る。除塵されたダストは本体1下部のホッパ部に堆積す
るので定期的にブローダウンライン14a,14bから
ダストを脱塵器1の外部へ払出す。[0004] The backwash line 8 is provided with a backwash nozzle 9 and a backwash valve 10 in the middle of the outlet pipe 4, and the backwash valve 10 is linked with the differential pressure gauge 7. That is, when the differential pressure of the filter element 2 increases, the backwash valve 10 is opened for about 0.3 to 0.5 seconds to generate a differential pressure in the reverse direction on the filter element 2 to remove dust. Since the dust that has been removed accumulates in the hopper at the lower portion of the main body 1, the dust is periodically discharged from the blowdown lines 14 a and 14 b to the outside of the dust remover 1.
【0005】逆洗用の空気源はコンプレッサ11からの
空気で、この空気を減圧弁18で減圧して逆洗チャンバ
13の圧力を調整してから逆洗空気として供給してい
る。[0005] The air source for backwashing is air from the compressor 11, which is depressurized by a pressure reducing valve 18 to adjust the pressure of the backwashing chamber 13 and then supplied as backwashing air.
【0006】[0006]
【発明が解決しようとする課題】図5に前記逆洗装置を
具えた脱塵器の運転中のフィルタエレメント差圧の経時
変化を示す。フィルタエレメント2の逆洗は逆洗弁10
の開閉で実施される。逆洗時には脱塵時のガス流れと逆
方向からフィルタエレメント内圧(絶体圧)の3倍程度
の圧力で圧縮空気を噴出してフィルタエレメント内面に
付着したダストを落下させる。その場合は瞬間的にフィ
ルタエレメント差圧はマイナス側に振れて逆洗時のピー
ク圧損となる。FIG. 5 shows a change with time of the filter element differential pressure during the operation of the dust remover provided with the above-mentioned backwashing device. Backwashing of filter element 2 is backwash valve 10
It is implemented by opening and closing. At the time of backwashing, compressed air is blown at a pressure of about three times the internal pressure (absolute pressure) of the filter element from the direction opposite to the gas flow at the time of dust removal to drop dust adhering to the inner surface of the filter element. In that case, the filter element differential pressure instantaneously swings to the minus side, causing a peak pressure loss during backwashing.
【0007】運転整定時(内圧,温度整定)には逆洗圧
力一定で逆洗ピーク圧損も安定した結果が得られている
が、昇圧が完了して内部温度が上昇過程であれば逆洗圧
力一定でも逆洗用空気の粘性、密度が温度によって変化
して一定でないためにピーク圧損が安定せず目標として
いるピーク圧損が得られていない。[0007] When the operation is settled (internal pressure and temperature settling), a result is obtained in which the backwash pressure is constant and the backwash peak pressure loss is stable. Even if it is constant, the viscosity and density of the backwash air change with temperature and are not constant, so that the peak pressure loss is not stabilized and the target peak pressure loss is not obtained.
【0008】従って、ピーク圧損が得られないと逆洗効
率が低下するので、所期の逆洗効果を得るために逆洗の
都度、逆洗タイムを変更せざるをえなくなる。これを避
けるため、含塵ガスの温度上昇過程ではその都度減圧弁
を調整して逆洗圧力を設定する必要がある。[0008] Therefore, if the peak pressure loss is not obtained, the backwashing efficiency decreases, so that the backwashing time must be changed every time the backwashing is performed in order to obtain the desired backwashing effect. In order to avoid this, in the process of raising the temperature of the dust-containing gas, it is necessary to adjust the pressure reducing valve each time to set the backwash pressure.
【0009】本発明は、フィルタエレメントを有する脱
塵器において、逆洗時のピーク圧損を一定に保ち安定し
た逆洗が行われるようにした脱塵器用逆洗装置を提供す
ることを課題としている。SUMMARY OF THE INVENTION It is an object of the present invention to provide a dust-removing device for a dust-removing device having a filter element, in which the peak pressure loss during the back-flushing is kept constant and stable back-flushing is performed. .
【0010】[0010]
【課題を解決するための手段】本発明は前記課題を解決
するため、コンプレッサから逆洗チャンバ間に従来設け
られていた減圧弁に代えて圧力調整弁を設置して逆洗チ
ャンバの圧力を自在に制御する様にする。According to the present invention, in order to solve the above-mentioned problems, a pressure regulating valve is provided in place of a pressure reducing valve conventionally provided between a compressor and a backwashing chamber to freely control the pressure in the backwashing chamber. Control.
【0011】そして本発明による逆洗装置では、その圧
力調整弁と共にフィルタエレメントの内部温度計測手段
とこの内部温度計測手段の計測温度に基づいて前記圧力
調整弁を調整する制御手段を設けた構成を採用する。な
お、圧力調整弁の圧力制御はフィルタエレメントの内部
温度に応じた圧力となるように予め制御手段に設定して
おく。The backwashing device according to the present invention has a structure in which together with the pressure regulating valve, an internal temperature measuring means of the filter element and a control means for adjusting the pressure regulating valve based on the temperature measured by the internal temperature measuring means are provided. adopt. The pressure control of the pressure regulating valve is set in the control means in advance so that the pressure is adjusted according to the internal temperature of the filter element.
【0012】[0012]
【作用】本発明による脱塵器用逆洗装置では前記した構
成を採用しており、昇圧が完了して内部温度が上昇して
いく過程において、内部温度計測手段で計測されたフィ
ルタエレメントの各温度における逆洗ガスの粘性、密度
に応じた逆洗圧力を与えるように圧力調整弁を制御す
る。The backwashing device for a dust remover according to the present invention employs the above-described structure. In the process of completing the pressure increase and increasing the internal temperature, each temperature of the filter element measured by the internal temperature measuring means is measured. The pressure control valve is controlled so as to give a backwash pressure according to the viscosity and density of the backwash gas in the above.
【0013】すなわち、例えば、制御手段に対し、逆洗
ガス圧力を図3に示すようにフィルタエレメントの内部
温度に応じて変化させるよう予め設定しておき、自動的
に圧力調整弁を制御することで逆洗時のピーク圧損を一
定に保ち安定した逆洗を実施するのである。That is, for example, the control means is preset to change the backwash gas pressure in accordance with the internal temperature of the filter element as shown in FIG. 3 and automatically controls the pressure regulating valve. Thus, the peak pressure loss during backwashing is kept constant and stable backwashing is performed.
【0014】[0014]
【実施例】以下、本発明による脱塵器用逆洗装置につい
て図1に示した一実施例に基づいて具体的に説明する。
なお、以下の実施例において、図4に示した従来の装置
と同じ構成の部分には説明を簡潔にするため同じ符号を
付してある。図1は図4と同様、脱塵器用逆洗装置の系
統図である。本体構造、含塵ガス流れ系統については図
4に示した従来技術と同様であるので説明を省略する。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A backwashing device for a dust remover according to the present invention will be specifically described below with reference to an embodiment shown in FIG.
In the following embodiments, the same components as those of the conventional apparatus shown in FIG. 4 are denoted by the same reference numerals for the sake of simplicity. FIG. 1 is a system diagram of a backwashing device for a dust remover, similarly to FIG. The structure of the main body and the flow system of the dust-containing gas are the same as in the prior art shown in FIG.
【0015】図1に示すものでは、コンプレッサ11と
逆洗チャンバ13の間に逆洗チャンバ13の圧力を制御
する圧力調整弁12が設置されている。また、フィルタ
エレメント2の内面には熱電対15が取付けられて、フ
ィルタエレメント2の内部温度を検出しコンピュータ1
7に指示出来るようになっている。In FIG. 1, a pressure regulating valve 12 for controlling the pressure in the backwash chamber 13 is provided between the compressor 11 and the backwash chamber 13. A thermocouple 15 is attached to the inner surface of the filter element 2 to detect the internal temperature of the filter element 2 and to detect the temperature of the computer 1.
7 can be instructed.
【0016】コンピュータ17は熱電対15の計測温度
に従って図3に示すように逆洗ガスの粘性、密度を加味
した逆洗ガス圧力(圧力計16)が逆洗チャンバ13に
得られるように圧力調整弁12を制御する。即ち、フィ
ルタエレメント2の内部温度が低い間は低い逆洗ガス圧
力を設定し、温度が高くなるに従ってガス圧も昇圧し、
その後、定常温度に保たれた状態でガス圧も一定に保持
する。According to the temperature measured by the thermocouple 15, the computer 17 adjusts the pressure so that the backwash gas pressure (pressure gauge 16) considering the viscosity and density of the backwash gas is obtained in the backwash chamber 13 as shown in FIG. Control the valve 12. That is, while the internal temperature of the filter element 2 is low, a low backwash gas pressure is set, and as the temperature increases, the gas pressure also increases,
Thereafter, the gas pressure is also kept constant while being kept at the steady temperature.
【0017】逆洗ガスの粘性、密度は、温度が高くなる
と、いずれも低くなるために、逆洗の作動効率が悪くな
り逆洗ガス圧を高く設定する必要がある。以上のよう
に、図1に示した脱塵器用逆洗装置によればフィルタエ
レメント逆洗時のピーク圧損を一定に保ち安定した逆洗
が行われる。Since the viscosity and density of the backwash gas decrease as the temperature increases, the backwashing operation efficiency deteriorates and the backwash gas pressure must be set high. As described above, according to the backwashing device for a dust remover shown in FIG. 1, stable backwashing is performed while maintaining a constant peak pressure loss during backwashing of the filter element.
【0018】[0018]
【発明の効果】以上詳細に説明したように、本発明の脱
塵器用逆洗装置によれば、フィルタエレメント昇温の過
程で逆洗を行う場合、逆洗圧力を温度によって調整して
いるため逆洗時のピーク圧損を目標値に合せることが出
来る。そのため図2に示すように逆洗過程であっても安
定した逆洗効果が得られる。As described above in detail, according to the backwashing apparatus for a dust remover of the present invention, when backwashing is performed in the process of raising the temperature of the filter element, the backwash pressure is adjusted by the temperature. The peak pressure loss at the time of backwash can be adjusted to the target value. Therefore, a stable backwashing effect can be obtained even in the backwashing process as shown in FIG.
【図1】本発明の一実施例による脱塵器用逆洗装置を具
えた脱塵装置の系統図。FIG. 1 is a system diagram of a dust remover having a backwashing device for a dust remover according to an embodiment of the present invention.
【図2】本発明の逆洗装置により逆洗を行ったときのフ
ィルタエレメントにおける差圧の経時変化を示す線図。FIG. 2 is a diagram showing a temporal change of a differential pressure in a filter element when backwashing is performed by the backwashing apparatus of the present invention.
【図3】フィルタエレメント内部温度と逆洗ガス圧の関
係を示す線図。FIG. 3 is a diagram showing a relationship between a filter element internal temperature and a backwash gas pressure.
【図4】従来の脱塵器用逆洗装置を具えた脱塵装置の系
統図。FIG. 4 is a system diagram of a conventional dust remover provided with a backwashing device for a dust remover.
【図5】従来の逆洗装置により逆洗を行ったときのフィ
ルタエレメントにおける差圧の経時変化を示す線図。FIG. 5 is a diagram showing a change over time of a differential pressure in a filter element when backwashing is performed by a conventional backwashing device.
1 脱塵器本体 2 フィルタエレメント 3 含塵ガス 4 出口配管 5 圧力調整弁 6 ガスタービン 7 差圧計 8 逆洗ライン 9 逆洗ノズル 10 逆洗弁 11 コンプレッサ 12 圧力調整弁 13 逆洗チャンバ 14a,14b ブローダウンライン 15 熱電対 16 圧力計 17 コンピュータ(制御手段) DESCRIPTION OF SYMBOLS 1 Deduster main body 2 Filter element 3 Dust-containing gas 4 Outlet piping 5 Pressure control valve 6 Gas turbine 7 Differential pressure gauge 8 Backwash line 9 Backwash nozzle 10 Backwash valve 11 Compressor 12 Pressure control valve 13 Backwash chamber 14a, 14b Blowdown line 15 Thermocouple 16 Pressure gauge 17 Computer (control means)
───────────────────────────────────────────────────── フロントページの続き (56)参考文献 特開 平5−223238(JP,A) 特開 平6−294510(JP,A) 特開 昭57−30520(JP,A) 特開 平6−190229(JP,A) (58)調査した分野(Int.Cl.7,DB名) B01D 46/00 - 46/54 ──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-5-223238 (JP, A) JP-A-6-294510 (JP, A) JP-A-57-30520 (JP, A) JP-A-6-294 190229 (JP, A) (58) Field surveyed (Int. Cl. 7 , DB name) B01D 46/00-46/54
Claims (1)
し逆洗チャンバから逆洗空気を間欠供給して前記フィル
タエレメントの除塵を行う脱塵器用逆洗装置において、
前記フィルタエレメントの内部温度計測手段、前記逆洗
チャンバの圧力調整弁、及び前記内部温度計測手段の計
測温度に基づいて前記圧力調整弁を調整する制御手段を
有することを特徴とする脱塵器用逆洗装置。A backwashing apparatus for a dust remover for intermittently supplying backwash air from a backwash chamber to a dust remover having a filter element to remove dust from the filter element.
A reverser for a dust remover, comprising: an internal temperature measuring means of the filter element, a pressure adjusting valve of the backwash chamber, and a control means for adjusting the pressure adjusting valve based on a temperature measured by the internal temperature measuring means. Washing equipment.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP30471094A JP3297229B2 (en) | 1994-12-08 | 1994-12-08 | Backwashing device for dust remover |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP30471094A JP3297229B2 (en) | 1994-12-08 | 1994-12-08 | Backwashing device for dust remover |
Publications (2)
Publication Number | Publication Date |
---|---|
JPH08155235A JPH08155235A (en) | 1996-06-18 |
JP3297229B2 true JP3297229B2 (en) | 2002-07-02 |
Family
ID=17936284
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP30471094A Expired - Fee Related JP3297229B2 (en) | 1994-12-08 | 1994-12-08 | Backwashing device for dust remover |
Country Status (1)
Country | Link |
---|---|
JP (1) | JP3297229B2 (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP5665297B2 (en) * | 2009-09-30 | 2015-02-04 | 三菱重工業株式会社 | Dust removal device |
-
1994
- 1994-12-08 JP JP30471094A patent/JP3297229B2/en not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
---|---|
JPH08155235A (en) | 1996-06-18 |
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