CN-116850649-B - Remote maintenance-free mechanical defoaming device, alkali liquor circulation tank and degreasing system

CN116850649BCN 116850649 BCN116850649 BCN 116850649BCN-116850649-B

Abstract

The invention relates to the technical field of defoaming, and provides a remote maintenance-free mechanical defoaming device which comprises a shell, a defoaming impeller for eliminating foam, a motor for driving the defoaming impeller to rotate, wherein the defoaming impeller is arranged in the shell, the shell is provided with a suction section for the foam to enter the shell, the remote maintenance-free mechanical defoaming device further comprises an impeller connecting shaft, the defoaming impeller is arranged on the impeller connecting shaft, the impeller connecting shaft is coaxially connected with a motor shaft of the motor through a coaxial sealing assembly, and a maintenance-free sealing assembly is further arranged on one side, close to the suction section, of the coaxial sealing assembly. Also provides an alkali liquor circulating tank which comprises the remote maintenance-free mechanical defoaming device. The degreasing system comprises the remote maintenance-free mechanical defoaming device. The maintenance-free sealing assembly and the coaxial sealing assembly are matched simultaneously to realize the sealing of the motor, so that the sealing performance can be ensured.

Inventors

JIA HONGLEI
ZHANG YI
WANG YAO
HE LIHONG
XIONG JUNWEI
LIU KUN

Assignees

中冶南方工程技术有限公司
大连吉尔天健泵业有限公司

Dates

Publication Date: 20260505
Application Date: 20230717

Claims (8)

1. An alkali liquor circulation tank is characterized by comprising a remote maintenance-free mechanical defoaming device and an iron mud treatment subsystem, The remote maintenance-free mechanical defoaming device comprises a shell, a defoaming impeller for eliminating foam, a motor for driving the defoaming impeller to rotate, wherein the defoaming impeller is arranged in the shell, the shell is provided with a suction section for foam to enter the shell, the remote maintenance-free mechanical defoaming device is characterized by also comprising an impeller connecting shaft, the defoaming impeller is arranged on the impeller connecting shaft, the impeller connecting shaft is coaxially connected with a motor shaft of the motor through a coaxial sealing component, a maintenance-free sealing component is further arranged on one side of the coaxial sealing component, which is close to the suction section, The iron mud treatment subsystem comprises an intermediate medium circulation mechanism and an iron mud recovery mechanism, wherein the intermediate medium circulation mechanism comprises a plurality of intermediate mediums capable of extracting iron mud at the bottom of an alkali liquor circulation tank, and a medium conveying unit, a medium transfer unit and a medium backflow unit which are sequentially connected, the medium conveying unit is communicated with an intermediate medium outlet of the alkali liquor circulation tank, the medium backflow unit is communicated with an intermediate medium inlet of the alkali liquor circulation tank, and the iron mud recovery mechanism comprises a flushing unit arranged above the medium transfer unit and an iron mud collecting box arranged below the medium transfer unit.
2. The lye circulation tank of claim 1, wherein said coaxial seal assembly comprises a coupling through which said impeller connection shaft and said motor shaft are coaxially connected.
3. The lye circulation tank of claim 2, wherein said coaxial seal assembly further comprises bearings for supporting said motor shaft and said impeller connection shaft.
4. The lye circulation tank of claim 3, wherein said coaxial seal assembly further comprises a bearing gland for securing the axial position of said bearing, said bearing gland being located between said coupling and said bearing.
5. The lye circulation tank of claim 1, wherein a bearing seal box is arranged outside the impeller connecting shaft.
6. The lye circulation tank of claim 1, wherein said maintenance-free seal assembly comprises a static and dynamic ring and a weight that urges said static and dynamic ring against said motor shaft when stationary.
7. The lye circulation tank of claim 6, further comprising a secondary impeller for generating a pressure opposite to that of said defoaming impeller, said secondary impeller being mounted on said motor shaft.
8. The lye circulation tank of claim 1, wherein a slide bearing is provided at an end of the impeller connecting shaft remote from the motor.

Description

Remote maintenance-free mechanical defoaming device, alkali liquor circulation tank and degreasing system Technical Field The invention relates to the technical field of defoaming, in particular to a remote maintenance-free mechanical defoaming device, an alkali liquor circulating tank and a degreasing system. Background In the fields of steel, chemical industry, medicine, food and the like, some foams which are not beneficial to production are easily generated due to chemical mediums adopted by the production requirements. If the foam is not treated effectively in time, the foam will cause harm to the production process and equipment, damage the production equipment, affect the quality of the product, and even reduce the production capacity. For example, in the field of steel plate and strip treatment, it is necessary to provide a degreasing section for cleaning the surface of rolled steel strip containing dirt such as grease, scale powder, iron powder, carbon powder, etc. Because the degreasing agent contains surfactant components, under the influence of stirring and temperature factors, the degreasing agent can wrap air to generate a large amount of foam, and the foam overflows a container to cause damage to a peripheral motor and environmental pollution. The foam overflows into the strip steel cleaning tank to affect the strip steel cleaning effect. At present, most of the industries adopt a mode of adding a chemical defoaming agent to eliminate foam of a medium seed by changing the surface tension of the foam and reducing the thickness of a foam liquid film. However, the chemical defoamer is expensive, and the time for the chemical defoamer to act is limited, so that the chemical defoamer is inevitably added at regular time during production, and the production cost is high. In addition, the chemical defoamer is difficult to degrade, the direct discharge mode is easy to pollute the environment, and the treatment cost is high. In the industry, a mechanical defoaming device is preliminarily tried, particularly, the centrifugal defoaming efficiency is higher, because the centrifugal mode is a motor and impeller mode, the impeller runs at high speed, if the liquid flow is flushed into the motor, the motor is burnt, the impeller runs for a long time or the impeller shaft is longer, the impeller rotation instability phenomenon is caused, and finally, the centrifugal defoaming mode is disabled and even the equipment is directly damaged. The main parts of the device contacted with the medium are easy to wear due to the impact of high pressure, high-speed liquid flow and foam flow generated by the impeller for a long time, so that the main parts are frequently maintained. Disclosure of Invention The invention aims to provide a remote maintenance-free mechanical defoaming device, an alkali liquor circulating tank and a degreasing system, which at least can solve part of defects in the prior art. In order to achieve the above purpose, the embodiment of the invention provides a remote maintenance-free mechanical defoaming device which comprises a shell, a defoaming impeller for eliminating foam, a motor for driving the defoaming impeller to rotate, an impeller connecting shaft, a defoaming impeller connecting shaft and a maintenance-free sealing assembly, wherein the defoaming impeller is arranged in the shell and is provided with a suction section for foam to enter the shell, the defoaming impeller connecting shaft is arranged on the impeller connecting shaft, the impeller connecting shaft is coaxially connected with a motor shaft of the motor through the coaxial sealing assembly, and the maintenance-free sealing assembly is further arranged on one side of the coaxial sealing assembly, which is close to the suction section. Further, the coaxial sealing assembly comprises a coupling through which the impeller connecting shaft and the motor shaft are coaxially connected. Further, the coaxial seal assembly also includes bearings for the motor shaft and the impeller connection shaft support. Further, the coaxial seal assembly also includes a bearing gland for securing the axial position of the bearing, the bearing gland being located between the coupling and the bearing. Further, the bearing seal box body is arranged outside the impeller connecting shaft. Further, the maintenance-free sealing assembly comprises a dynamic ring and a static ring, and the dynamic ring and the static ring can be driven to be tightly attached to a gravity block of the motor shaft when the maintenance-free sealing assembly is static. Further, the motor further comprises an auxiliary impeller which can generate the opposite pressure direction to the defoaming impeller, and the auxiliary impeller is arranged on the motor shaft. Further, one end of the impeller connecting shaft, which is far away from the motor, is provided with a sliding bearing. The embodiment of the invention provides another technical scheme that the alkali liquor circula