KR20040018616A - Agitator for water treatment plants - Google Patents

Agitator for water treatment plants Download PDF

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Publication number
KR20040018616A
KR20040018616A KR1020020050006A KR20020050006A KR20040018616A KR 20040018616 A KR20040018616 A KR 20040018616A KR 1020020050006 A KR1020020050006 A KR 1020020050006A KR 20020050006 A KR20020050006 A KR 20020050006A KR 20040018616 A KR20040018616 A KR 20040018616A
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South Korea
Prior art keywords
shaft
central shaft
drive unit
impeller
central
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KR1020020050006A
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Korean (ko)
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KR100482408B1 (en
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안성욱
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안성욱
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Priority to KR10-2002-0050006A priority Critical patent/KR100482408B1/en
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    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
    • C02F1/5209—Regulation methods for flocculation or precipitation
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2201/00—Apparatus for treatment of water, waste water or sewage
    • C02F2201/002—Construction details of the apparatus

Abstract

PURPOSE: Provided is an agitator for water treatment plant, which has two impellers being installed at different depth of an agitation tank and rotating in different direction at different revolution speed, so it has high agitation efficiency and safety. CONSTITUTION: The agitator comprises a drive unit(30) installed above an agitation tank(10) and working with a motor(20) and a drive shaft(21), a central shaft(32) coupled to the drive unit(30) at an upper end portion and extending to near the bottom of the agitation tank(10), an impeller(42) being coupled to a lower end portion of the central shaft(32) and rotating in a first direction at first rpm by the drive unit(30), a hollow shaft(40) coaxially installed to surround the central shaft(32), connected to the drive unit(30) at an upper end portion and extending to a middle portion of the central shaft(32), and an impeller(41) being coupled to a lower end portion of the hollow shaft(40) and rotating in the different direction from a first direction at different rpm from the first rpm.

Description

수처리장의 교반장치{AGITATOR FOR WATER TREATMENT PLANTS}Agitation device of water treatment plant {AGITATOR FOR WATER TREATMENT PLANTS}

본 발명은 수처리장의 교반장치에 관한 것으로, 좀 더 구체적으로는 수처리과정에서 교반기에 의하여 하나의 축선상에 설치되는 상하로 설치되는 이중 임펠러의 회전속도의 차이를 두어 교반의 효율성을 높이도록 한 것이다.The present invention relates to a stirrer of a water treatment plant, and more specifically, to increase the efficiency of agitation by giving a difference in the rotational speed of the double impeller installed up and down installed on one axis by the stirrer in the water treatment process. will be.

정수장, 하수장 또는 페수처리장 등의 수처리장에서 교반기(혼화기,응집기 포함)운전은 수처리 공정에서 필수적인 공정으로, 교반기 역활은 공정수에서 교반할 때 부유한계속도(이물질이 침전되지 않는 속도)의 이상을 유지하여 교반조의 바닥면에 침전되지 않도록 운전되어야 한다.In water treatment plants such as water purification plants, sewage plants or wastewater treatment plants, the operation of agitators (including admixtures and agglomerators) is an essential process in the water treatment process, and the role of the agitator is rich in continuity when stirring in process water (speed of no foreign matter). It should be operated so as not to settle on the bottom of the stirring vessel by maintaining the ideal of.

그러나 기존의 이중 임펠러가 설치된 교반장치는 상하의 임펠러가 동일한 회전방향으로 동일 회전수로 회전되고 있고 부유한계속도와 교반속도가 동일하게 운전되고 있어 약품등이 물에 희석이 잘되지 않아 교반효율의 저하로 충분한 교반이 이루어지지 않게되고 침전물의 응고로 교반이 이루어지지 않는 등의 문제점이 있었다.However, in the conventional agitator equipped with a double impeller, the upper and lower impellers are rotated at the same rotational speed in the same rotation direction, and the floating continuity and the stirring speed are operated the same. As such, there was a problem that sufficient stirring was not made and stirring was not made due to coagulation of the precipitate.

이러한 문제점을 감안하여 제안된 선행기술로는 특허출원 2000-0067394호 "정수 및 오페수장의 교반장치"가 제안된 바,In view of such a problem, the proposed prior art has been proposed as a patent application No. 2000-0067394 "agitating device of purified water and Ope storage",

그 기술내용을 살펴보면, 도 1에서와 같이 모타를 포함하는 구동장치(2)에 의하여 구동되는 회전축(3)을 상하로 분리구성하여 회전변속장치(6)에 각각 상하로 축설하고 회전변속장치(6)는 교반조(1)의 양측벽에 지지대(12)로 고정시키어 상하부축(3a,3b)이 회전수가 서로 다르게 구성하여 상하부축에 각각 설치한 임펠러(4a,4b)이 다른 회전속도로 회전되도록 하므로서 교반이 효율적으로 이루어지도록 한 것이다.Looking at the technical contents, as shown in Figure 1, the rotating shaft (3) driven by the drive device (2) including the motor is configured to be separated up and down in the rotary transmission device (6) up and down respectively, and the rotary transmission device ( 6) is fixed to both sides of the agitator tank (1) by the support 12, the upper and lower shafts (3a, 3b) is composed of different rotational speed impellers (4a, 4b) respectively installed on the upper and lower shafts at different rotation speed By allowing the stirring to be done efficiently.

그러나 위 선행기술은 상하부축(3a,3b)을 분리하여 그 사이에 회전변속장치(6)를 구비됨에 따라 교반시 교반물의 수중에 잠긴 상태에서 작동되기 때문에 회전변속장치의 외부박스가 수밀성 및 부식등이 요구되고 장기간 사용하다 보면 수밀성 및 부식이 저하되어 이를 교체하여야 하는 번거로움과 사용중 고장등으로 수리할 경우에는 교반물을 빼낸 후 하여야 하는 등의 어려움이 있다.However, in the prior art, since the upper and lower shafts 3a and 3b are separated and the rotary transmission device 6 is provided therebetween, the outer box of the rotary transmission is watertight and corroded because it operates in a state of being submerged in the water of stirring. It is required to remove the agitation when repairing due to the hassle that needs to be replaced and breakdown during use due to deterioration of watertightness and corrosion when used for a long time.

본 발명은 상기한 선행기술의 문제점을 해결하기 위한 것으로, 회전변속장치를 교반조 상부에 위치하고 회전축의 축선상에 이중축으로 구성하여 내,외축이 서로 다른 회전속도로 회전되도록 하므로서 교반기의 효율성 및 안전성을 향상시키도록 한 수처리장의 교반장치를 제공함에 그 목적이 있다.The present invention is to solve the above problems of the prior art, the rotary transmission device is located on the upper side of the stirring tank and composed of a double shaft on the axis of the rotating shaft so that the inner and outer shafts are rotated at different rotational speed and efficiency of the stirrer It is an object of the present invention to provide an agitation device for a water treatment plant to improve safety.

도 1은 종래의 교반장치를 보인 구성도1 is a block diagram showing a conventional stirring device

도 2는 본 발명의 교반장치를 보인 구성도Figure 2 is a block diagram showing a stirring device of the present invention

도 3은 본 발명의 요부를 보인 확대도Figure 3 is an enlarged view showing the main part of the present invention

*도면의 주요부분에 대한 부호의 설명** Description of the symbols for the main parts of the drawings *

10: 교반조10: stirring tank

20: 전동장치 21:구동축20: transmission 21: drive shaft

30: 드라이브 유니트30: drive unit

31: 기어박스 32: 중심축31: gearbox 32: central axis

33: 커풀링 34,36: 지지커버33: Coupling 34,36: Support cover

35,37: 받침대 38: 보조축35, 37: base 38: auxiliary shaft

39,39';기어 40: 중공축39, 39 '; Gear 40: Hollow Shaft

본 발명의 목적을 달성하기 위한 특징적인 구성을 설명하면 다음과 같다.The characteristic configuration for achieving the object of the present invention is as follows.

본 발명은 모타 및 감속기를 포함하는 전동장치에 의하여 회전하는 축에 상하로 설치한 임펠러가 회전되도록 한 교반장치에 있어서,The present invention provides a stirring device for rotating the impeller installed up and down on a rotating shaft by a transmission device including a motor and a reducer,

전동장치의 구동축이 축설하여 회전을 변환하도록 하는 드라이브 유니트를교반조의 상부에 설치함과, 드라이브 유니트에 의해 중심축과 다른 회전속도를 갖는 중공축을 동일축상으로 설치하여 교반조의 중간 적정 위치까지 이르게 하여 그 단부에 임펠러를 설치하고 하방까지 이르는 중심축의 단부에 임펠러를 설치하여 상하 임펠러가 서로 다른 속도로 회전되도록 한것을 특징으로 한다.A drive unit is installed in the upper part of the stirrer to allow rotation of the drive shaft of the electric machine to change rotation. It is characterized in that the impeller is installed at the end and the impeller is installed at the end of the central axis leading down to rotate the upper and lower impellers at different speeds.

상기 드라이브 유니트는 기어박스에 유입되는 구동축에 커플링으로 연결한 중심축에는 상하부로 지지커버를 유동되게 축설하여 받침대로 지지되게 체결하고 상부 지지커버의 한측으로 형성한 축공과 하부의 받침대에 형성한 축공에 보조축을 설치함과, 상기 지지커버의 사이에 중심축과 보조축에 축설되어 치합되는 한쌍의 상하부 기어를 설치하되, 중심축에 설치되는 하부의 기어는 고정되지 않고 회전되도록 설치하면서 중심축에 끼워진 중공축과 연결하여 중심축과 다른 속도로 중공축이 회전되도록 구성한다.The drive unit is formed in the shaft hole formed on one side of the upper support cover and the lower stand and the support shaft is installed in the center shaft connected to the drive shaft flowing into the gear box by coupling the support cover up and down to flow The auxiliary shaft is installed in the shaft hole, and a pair of upper and lower gears which are installed on the central shaft and the auxiliary shaft between the support cover are installed, and the lower gears installed on the central shaft are rotated without fixing. It is configured to rotate the hollow shaft at a different speed from the central axis in connection with the hollow shaft inserted in the.

이와같이 구성되는 본 발명을 첨부한 도면에 의하여 보다 상세히 설명하면 다음과 같다.When described in more detail by the accompanying drawings of the present invention configured as described above are as follows.

도 2는 본 발명의 전체를 보인 구성도이고 도 3은 본 발명의 요부를 보인 확대도이다.2 is a configuration diagram showing the whole of the present invention and Figure 3 is an enlarged view showing the main part of the present invention.

정수장 또는 하수처리장에서 약품등을 물에 회석시키기 위한 교반공정으로 모타 및 감속기를 갖는 전동장치(20)에 의하여 회전되도록 교반조(10)에 수직으로 설치된 구동축(21)에 연결되어 연동되는 중심축(32)에 상하로 설치한 임펠러(41,42)가 회전되도록 한 교반장치(1)를 구성함에 있어서,A central axis connected to the drive shaft 21 installed perpendicular to the agitator tank 10 so as to be rotated by the electric device 20 having a motor and a reducer in a stirring process for diluting drugs and the like to water in a water purification plant or a sewage treatment plant. In constructing the stirring apparatus 1 in which the impellers 41 and 42 installed up and down in the 32 are rotated,

교반조(10) 상단에 체결하여 고정하는 드라이브 유니트(20)의 상면에 전동장치(10)를 설치하여 전동장치(10)의 구동축(21)이 드라이브 유니트(30)에 축설되고 드라이브 유니트(30)를 거쳐 연동되는 회전축(21)과 다른 회전속도를 갖는 중공축(40)을 동일축상으로 설치하여 중공축(40)은 교반조(10)의 중간 적정 위치까지 이르게 하여 그 단부에 임펠러(41)를 설치하고 하방까지 이르는 중심축(32)의 단부에 또 다른 임펠러(42)을 설치하여 상하 임펠러(41,42)이 서로 다른 속도로 회전되도록 한 것이다.By installing the transmission device 10 on the upper surface of the drive unit 20 to be fastened to the top of the stirring vessel 10, the drive shaft 21 of the transmission device 10 is built in the drive unit 30 and the drive unit 30 A hollow shaft 40 having a different rotational speed and a rotational shaft 21 interlocked with each other is installed on the same axis so that the hollow shaft 40 reaches an appropriate position in the middle of the stirring vessel 10 to impeller 41 at its end. ) And another impeller 42 is installed at the end of the central shaft 32 leading down to allow the upper and lower impellers 41 and 42 to rotate at different speeds.

상기 드라이브 유니트(30)는, 사각형체를 이루는 기어박스(31)내에 상부를 통해 축설한 구동축(21)에 교반조(10)의 하방까지 이르는 중심축(32)을 한쌍의 커플링(33)으로 연결하고 중심축(32)에는 상부에 위치하도록 하는 지지커버(34)를 위치시키어 기어박스(31)의 측벽에 지지되는 상부 받침대(35)에 체결하여 지지하며, 또 중심축(32)의 하부에 지지커버(36)를 위치시키어 기어박스(31)의 측벽에 지지되는 하부 받침대(37)에 체결하여 지지한다.The drive unit 30 has a pair of couplings 33 having a central shaft 32 extending down the stirring tank 10 to a drive shaft 21 arranged through the upper portion of the gear box 31 forming a rectangular body. And a support cover 34 positioned at an upper portion of the central shaft 32 so as to be fastened to and supported by an upper pedestal 35 supported on the side wall of the gearbox 31. The support cover 36 is positioned at the lower side to be fastened to the lower pedestal 37 supported on the side wall of the gear box 31.

상기 상부의 지지커버(34)의 한 쪽으로 연장된 축지지 부분에 형성한 축공(34a)과 동일축선상의 하부 받침대(37)에 축공(37a)을 형성하여 이 축공(34a,37a)을 통해 보조축(38)을 축설하며, 상기 중심축(32)과 보조축(38)에 축설되어 치합되는 한쌍의 상하부 기어(39,39')를 설치하되, 중심축(32)에 설치되는 하부 기어(39a)는 중심축(32)에 고정되지 않고 유동되게 설치하면서 중심축(32)이 끼워지는 중공축(40)과 연결하여 보조축(38)에 축설한 하부 기어(39')에 의하여 중공축(40)이 별도로 회전되도록 구성한다.Axial holes 37a are formed in the lower pedestal 37 on the same axis as the axial holes 34a formed in the axial support portion extending to one side of the upper support cover 34 to assist through the axial holes 34a and 37a. And a pair of upper and lower gears 39 and 39 'which are arranged on the central shaft 32 and the auxiliary shaft 38 to be engaged with each other, and the lower gear installed on the central shaft 32. The hollow shaft 39a is connected to the hollow shaft 40 to which the central shaft 32 is fitted while being installed in a fixed manner without being fixed to the central shaft 32, and the hollow shaft is formed by the lower gear 39 'installed on the auxiliary shaft 38. 40 is configured to rotate separately.

그리고 각 축과 유동되게 설치되는 부품의 결합부분에는 부싱을 설치하고 축에 고정되는 부품은 키이로 회동되지 않도록 하였다.In addition, a bushing is installed in the coupling portion of the components installed to flow with each shaft, and the components fixed to the shaft are not rotated by the key.

이와 같이 구성한 본 발명의 작동상태를 살펴보면,Looking at the operating state of the present invention configured as described above,

교반조(10)에서 약품등의 투입으로 이를 물에 희석하는 등의 교반공정에서는 전동장치(20)를 작동시키면 드라이브 유니트(30)에 축설한 구동축(21)과 커플링(33)으로 연결하여 교반조(10)의 하방까지 연장된 중심축(32)이 회전하게 됨에 따라 그 단부에 설치된 임펠러(42)가 적정 회전속도로 회전하여 교반조(10)의 하방을 희석시키게 된다.In the stirring process, such as diluting it in water by adding chemicals in the stirring tank 10, when the electric device 20 is operated, the drive shaft 21 connected to the drive unit 30 and the coupling 33 are connected to each other. As the central shaft 32 extended to the lower side of the stirring vessel 10 rotates, the impeller 42 installed at its end rotates at an appropriate rotational speed to dilute the lower side of the stirring vessel 10.

그리고 상기 중심축(32)의 한측에 지지커버(34) 및 하부 받침대(37)에 축설된 보조축(38)과 중심축(32)에 치합되게 설치된 상하부 한쌍의 기어(39,39')에 의한 회전비가 변환되어 중심축(32)의 하부에 유동되게 설치된 기어(39a)가 중심축(32)의 회전속도와 다른 회전속도를 갖게 됨에 따라 이 기어(39a)와 연설된 중공축(40)의 단부에 설치된 임펠러(41)가 하부에 중심축(32)에 설치한 임펠러(42)와 다른 회전속도를 갖게 되는 것이다.And a pair of upper and lower gears 39 and 39 'installed on the support shaft 34 and the lower pedestal 37 at one side of the central shaft 32 and the secondary shaft 38 and the central shaft 32. By rotating the gear ratio of the gear 39a installed at the lower portion of the central shaft 32 has a rotational speed different from the rotational speed of the central shaft 32, and the hollow shaft 40 spoke with the gear 39a. Impeller 41 installed at the end of the will have a different rotational speed than the impeller 42 provided in the central axis 32 in the lower portion.

이에 따라 하부의 임펠러(41)는 부유한계속도로 회전되도록 하고 상부의 임펠러(41)는 교반에 필요한 속도로 회전되도록 하므로서 희석이 빠르고 교반조(10)의 바닥에 응집물 등이 가라 앉지 않게 하야 교반효율을 높이게 하는 것이다.Accordingly, the lower impeller 41 is rotated with a rich continuity and the upper impeller 41 is rotated at a speed necessary for stirring, so that the dilution is fast and the aggregates do not sink to the bottom of the stirring tank 10. It is to increase the efficiency.

상기에서 상부의 임펠러(41)의 회전속도는 드라이브 유니트(30)에서 기어의 회전비에 의하여 조정됨에 따라 교반조의 여건에 따라 최적의 회전속도로 운전되도록 제작되는 것이다.In the above, the rotational speed of the upper impeller 41 is manufactured to be operated at an optimum rotational speed according to the conditions of the agitation tank as it is adjusted by the rotational ratio of the gear in the drive unit 30.

한편으로 상기 어느 한쌍의 기어의 상이에 또 다른 기어를 연결하여 주면 중공축(40)의 회전방향을 중심축(32)과 반대로 회전되도록 할 수도 있다.On the other hand, by connecting another gear to the difference between any one of the pair of gears may be rotated in the opposite direction to the central axis 32 of the hollow shaft 40.

이상과 같이 본 발명은 종래와 같이 드라이브 유니트가 수중에 위치함에 다른 수밀성 부식 등에 어려움을 해소하면서 외부에 노출된 상태이기 때문에 유지,보수가 극히 용이한 등이 효과가 있다.As described above, the present invention has the effect of being extremely easy to maintain and repair because the drive unit is located in the water and is exposed to the outside while eliminating difficulties in other watertight corrosion and the like.

Claims (3)

모타 및 감속기를 포함하는 전동장치에 의하여 회전하는 축에 상하로 설치한 임펠러가 회전되도록 한 교반장치에 있어서,In the stirring device to rotate the impeller installed up and down on the rotating shaft by a transmission device including a motor and a reducer, 전동장치의 구동축이 축설하여 회전을 변환하도록 하는 드라이브 유니트를 교반조의 상부에 설치함과, 드라이브 유니트에 의해 중심축과 다른 회전속도를 갖는 중공축을 동일축상으로 설치하여 교반조의 중간 적정 위치까지 이르게 하여 그 단부에 임펠러를 설치하고 하방까지 이르는 중심축의 단부에 임펠러를 설치하여 상하 임펠러가 서로 다른 속도로 회전되도록 한 것을 특징으로 하는 수처리장의 교반장치.A drive unit is installed in the upper part of the agitator tank to change the rotation of the drive shaft of the transmission, and a hollow shaft having a rotational speed different from that of the central axis is installed on the same axis by the drive unit to reach an appropriate position in the middle of the agitator tank. An impeller is installed at an end thereof, and an impeller is installed at an end portion of a central shaft extending downward, so that the upper and lower impellers rotate at different speeds. 제1항에 있어서,The method of claim 1, 드라이브 유니트는 기어박스에 유입되는 구동축에 커플링으로 연결한 중심축의 한측에 보조축을 축설하여 중심축과 보조축에 축설되어 치합되는 한쌍의 상하부 기어를 설치하되, 중심축에 설치되는 하부의 기어는 고정되지 않고 회전되도록 설치하면서 중심축에 끼워진 중공축과 연결하여 중심축과 다른 속도로 중공축이 회전되도록 구성함을 특징으로 하는 수처리장의 교반장치.The drive unit installs a pair of upper and lower gears which are installed on the central shaft and the auxiliary shaft by joining the auxiliary shaft on one side of the central shaft connected to the drive shaft flowing into the gearbox by coupling, but the lower gear installed on the central shaft Stirring apparatus of the water treatment plant characterized in that the hollow shaft is rotated at a different speed from the central shaft by connecting to the hollow shaft fitted to the central shaft while being installed to rotate without being fixed. 제1항 또는 제2항의 어느 한 항에 있어서,The method according to claim 1 or 2, 상기 드라이브 유니트내에 중심축의 상하부로 지지커버를 유동되게 축설하여받침대로 지지되게 체결하고 상부 지지커버의 한측으로 형성한 축공과 하부의 받침대에 형성한 축공에 보조축을 설치함을 특징으로 하는 수처리장의 교반장치.The auxiliary shaft is installed in the drive unit by moving the support cover to the upper and lower portions of the central shaft to be supported by the support, and the auxiliary shaft is installed in the shaft hole formed in one side of the upper support cover and the shaft hole formed in the lower pedestal. Stirring device.
KR10-2002-0050006A 2002-08-23 2002-08-23 Agitator for water treatment plants KR100482408B1 (en)

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KR100760008B1 (en) * 2007-06-04 2007-09-18 (주) 영동엔지니어링 Stirring equipment controling the velocity for advanced treatment
KR101014593B1 (en) * 2010-01-20 2011-02-16 김대열 Multi-axis rotating agitator of high enrichment digester
KR101015470B1 (en) * 2009-12-11 2011-02-18 김대열 Multi-axis rotating agitator of high enrichment digester
KR101144087B1 (en) * 2011-12-14 2012-05-23 이미경 Agitating unit
KR101478099B1 (en) * 2014-01-20 2014-12-31 김유학 Multi-shaft agitator with a scum blade
KR101508605B1 (en) * 2014-09-19 2015-04-08 김유학 Impeller for agitator and agitator for water treatment using the same
CN108689488A (en) * 2018-08-10 2018-10-23 合肥市恒昌自动化控制有限责任公司 A kind of sewage treatment plant's accurate aeration system based on on-line checking ammonia nitrate nitrogen content
CN110357228A (en) * 2019-06-19 2019-10-22 盐城恒泽水环境治理有限公司 A kind of Hospital Sewage Treatment sterilizing equipment decontaminating apparatus
CN115212835A (en) * 2022-08-11 2022-10-21 薛飞波 Avoid circulation stirring chemical industry reation kettle of layering

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KR100760008B1 (en) * 2007-06-04 2007-09-18 (주) 영동엔지니어링 Stirring equipment controling the velocity for advanced treatment
KR101015470B1 (en) * 2009-12-11 2011-02-18 김대열 Multi-axis rotating agitator of high enrichment digester
KR101014593B1 (en) * 2010-01-20 2011-02-16 김대열 Multi-axis rotating agitator of high enrichment digester
KR101144087B1 (en) * 2011-12-14 2012-05-23 이미경 Agitating unit
KR101478099B1 (en) * 2014-01-20 2014-12-31 김유학 Multi-shaft agitator with a scum blade
KR101508605B1 (en) * 2014-09-19 2015-04-08 김유학 Impeller for agitator and agitator for water treatment using the same
CN108689488A (en) * 2018-08-10 2018-10-23 合肥市恒昌自动化控制有限责任公司 A kind of sewage treatment plant's accurate aeration system based on on-line checking ammonia nitrate nitrogen content
CN110357228A (en) * 2019-06-19 2019-10-22 盐城恒泽水环境治理有限公司 A kind of Hospital Sewage Treatment sterilizing equipment decontaminating apparatus
CN115212835A (en) * 2022-08-11 2022-10-21 薛飞波 Avoid circulation stirring chemical industry reation kettle of layering
CN115212835B (en) * 2022-08-11 2024-02-13 广东沁林机械设备实业有限公司 Circulation stirring chemical industry reation kettle of layering is avoided

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