JP3160793U - Scrubber - Google Patents

Abstract

A scrubber is provided that does not cause the cleaning liquid to flow into the water main even when the cleaning liquid in the cleaning liquid tank becomes uncontrollable. A cleaning liquid is sprayed onto an exhaust gas passage, thereby cleaning the exhaust gas through gas-liquid contact, storing the cleaning liquid in a cleaning liquid tank 21 disposed below the casing, and cleaning the cleaning liquid tank 21. Is sprayed again into the exhaust gas passage as a cleaning liquid. An auxiliary tank 31 connected to the water main pipe 34 is disposed above the cleaning liquid tank 21 via a valve 33 operated by a water level sensor 33a, and the auxiliary tank 31 is connected via a valve 36 operated by a water level sensor 36a. The cleaning liquid tank 21 is communicated. [Selection] Figure 4

Description

  The present invention relates to a scrubber. More specifically, the present invention relates to a scrubber in which a cleaning liquid after cleaning is stored in a tank, and the cleaning liquid is circulated and reused.

  In the scrubber, the cleaning liquid that has been gas-liquid cleaned is dropped and stored in a cleaning liquid tank disposed in the lower part of the casing. Then, the cleaning liquid is used again for exhaust gas cleaning by a pump (see, for example, Patent Document 1). In such a cleaning liquid tank, the water main is communicated with the upper part of the tank via a valve, and when the cleaning liquid decreases, the valve is opened to supply water from the water main into the tank. When the cleaning liquid in the tank exceeds a predetermined amount, the cleaning liquid is discharged out of the tank due to overflow.

Japanese Patent Laid-Open No. 10-263349 (see FIG. 4)

  By the way, the cleaning liquid in the cleaning liquid tank may be contaminated by the components of the processing gas or may contain chemicals that neutralize it, and when the water level of the cleaning liquid in the tank rises with the overflow blocked, There is a possibility that the supply port of the water main may be immersed in the cleaning liquid. If the supply port of the water main is immersed in the cleaning liquid, the cleaning liquid may flow into the water main and contaminate the water in the water main.

  An object of the present invention is to provide a scrubber in which the cleaning liquid does not flow into the water main even when the cleaning liquid in the cleaning liquid tank becomes uncontrollable.

  In order to achieve the above-mentioned object, the scrubber according to claim 1 sprays the cleaning liquid into the exhaust gas passage through which exhaust gas is supplied from the lower part of the casing and discharged from the upper part of the casing, thereby achieving gas-liquid contact and exhausting the exhaust gas. In a scrubber that cleans the gas, stores the cleaning liquid in a cleaning liquid tank disposed below the casing, and again supplies the cleaning liquid in the cleaning liquid tank as the cleaning liquid to the exhaust gas passage, a water level sensor is provided above the cleaning liquid tank. An auxiliary tank connected to the water main through an actuated valve is disposed, and the auxiliary tank is communicated with the washing tank via a valve actuated by a water level sensor.

  The scrubber according to claim 2 is characterized in that, in the device according to claim 1, the valve detects a water level by a float and is opened and closed by movement of the float.

  According to the scrubber according to the present invention described above, when the valve of the cleaning liquid tank fails and remains open, the cleaning liquid in the cleaning liquid tank is drained due to overflow, but the drain is not sufficient and the cleaning liquid However, since the water main is connected through the auxiliary tank, there is no possibility that the water main will be immersed in the cleaning liquid.

It is the partial cross section side view which showed one Embodiment of the scrubber which concerns on this invention. It is the horizontal sectional view of the casing lower part in the scrubber of Drawing 1, and is a figure showing the important section of exhaust gas supply means. It is the schematic diagram which showed the principal part of the washing | cleaning liquid spraying means in the scrubber of FIG. It is sectional drawing which showed the washing | cleaning liquid supply means in the scrubber of FIG.

  Hereinafter, a cleaning liquid tank for a scrubber according to the present invention will be described in detail based on the embodiments shown in the drawings.

  The scrubber shown in FIG. 1 includes a casing 2 having a cylindrical inner surface in a cylindrical tower 1. The scrubber has an exhaust gas supply means 10 that injects exhaust gas horizontally from the lower side of the casing 2 along the peripheral surface of the casing 2, and a cleaning liquid sprayed and sprayed over the entire horizontal area of the casing 2. Is stored in the cleaning liquid tank 21, and the cleaning liquid spraying means 20 circulates and uses the cleaning liquid again for exhaust gas cleaning, and the cleaning liquid supply means 30 supplies fresh water to the cleaning liquid tank when the cleaning liquid in the cleaning liquid tank 21 decreases. ing.

  The exhaust gas supply means 10 includes a blower 11. The exhaust gas discharge duct 12 of the blower 11 is opened toward the inner peripheral surface of the casing 2 as shown in FIG. This blower 11 is a sirocco fan, has an exhaust gas inlet 13 at one end face, and is connected to a motor 14 at the other side face.

  The cleaning liquid spraying means 20 includes a water conduit 22 installed on the axial center of the casing 2. As shown in FIG. 3, a plurality of stages (seven stages in this embodiment) of nozzles 23 are connected to the water conduit 22. The nozzles 23 of each stage are planted on the peripheral surface of the water conduit 22 in a direction displaced by 60 degrees on the horizontal plane, and a jet outlet 24 is formed at the tip of the nozzle 23 toward the horizontal plane of the nozzle 23.

As shown in FIG. 1, the lower end of the water conduit 22 is connected to a pump 26 via a pipe 25. The pump 26 is connected to the cleaning liquid tank 21 via a pipe 27.
In this scrubber, a disc-shaped baffle plate 5 is installed at the upper end of the water conduit 22 as shown in FIGS. 1 and 3.

  As shown in FIG. 1, the cleaning liquid supply unit 30 includes an auxiliary tank 31. The auxiliary tank 31 is disposed above the cleaning liquid tank 21. The auxiliary tank 31 communicates with the upper part of the cleaning liquid tank 21 by a pipe 32. As shown in FIG. 4, the auxiliary tank 31 includes a valve 33 that is operated by a water level sensor. This valve 33 is provided with a float 33a, the water level of the auxiliary tank 31 is measured with the float 33a, and is opened and closed by the float 33a. The auxiliary tank 31 is connected to a water main pipe 34 via a valve 33. The auxiliary tank 31 is provided with an overflow 35.

  Further, the cleaning liquid supply means 30 includes a valve 36 that is operated by a water level sensor at a connection portion of the pipe 32 with the cleaning liquid tank 21. The valve 36 includes a float 36a. The water level of the washing tank 21 is measured by the float 36a, and the valve 36 is opened and closed by the float 36a. An overflow 28 is installed in the cleaning liquid tank 21.

  In the scrubber configured as described above, the exhaust gas is guided by the discharge duct 12 and injected and supplied to the lower peripheral surface of the casing 2. Therefore, the exhaust gas is raised while circling along the peripheral surface of the casing 2. On the other hand, the cleaning liquid is fed from the cleaning liquid tank 21 to the water conduit 22 through the pipes 27 and 25 by the pump 26. And the washing | cleaning liquid is sprayed in each direction toward the inner surface of the casing 2 from the jet nozzle 24 of the nozzle 23 of a multistage.

  Therefore, the exhaust gas swirled and raised in the casing 2 is subjected to gas-liquid cleaning by the cleaning liquid ejected from the ejection ports 24 of the nozzles 23 arranged in the respective stages, and passes through the mist separator 3 to the outside from the exhaust port 4. Is discharged.

  In the scrubber cleaning liquid supply means 30, when the water level in the cleaning liquid tank 21 decreases, the float 36 a descends with the decrease in the water level, thereby opening the valve 36. Accordingly, fresh water in the auxiliary tank 31 is supplied to the cleaning liquid tank 21. When the water level of the cleaning liquid tank 21 reaches a predetermined water level, the valve 36 is closed and the supply of fresh water is stopped.

  When the water level in the auxiliary tank 31 is lowered, the float 33a is lowered with the drop in the water level, thereby opening the valve 33. Accordingly, fresh water is supplied from the water main 34 into the auxiliary tank 31. When the water level in the auxiliary tank 31 reaches a predetermined water level, the valve 33 is closed and the supply of fresh water is stopped.

  If the valve 36 of the cleaning liquid tank 21 fails and remains open, the cleaning liquid in the cleaning liquid tank 21 is drained by the overflow 28, but the drain is not sufficient and the cleaning liquid rises. However, since the water main 34 is connected via the auxiliary tank 31, there is no possibility that the water main 34 is immersed in the cleaning liquid.

  In the above embodiment, the valve 33 actuated by the float 33a is shown as the valve actuated by the water level sensor, but other mechanical, optical, electrical, etc. are used. May be.

DESCRIPTION OF SYMBOLS 1 Tower 2 Casing 3 Mist separator 4 Exhaust port 5 Baffle plate 10 Exhaust gas supply means 11 Blower 12 Exhaust gas discharge duct 13 Exhaust gas intake port 14 Motor 20 Cleaning liquid spraying means 21 Cleaning liquid tank 22 Water conduit 23 Nozzle 24 Outlet 25 Piping 26 Pump 27 Piping 28 Overflow 30 Cleaning liquid supply means 31 Auxiliary tank 32 Piping 33 Valve 33a Float 34 Water main 35 Overflow 36 Valve 36a Float

Claims (2)

  The cleaning liquid is sprayed to the exhaust gas passage for supplying exhaust gas from the lower part of the casing and exhausting from the upper part of the casing, thereby cleaning the exhaust gas by contacting the gas and liquid, and the cleaning liquid is disposed below the casing. In the scrubber that stores the cleaning liquid in the cleaning liquid tank and supplies and sprays the cleaning liquid in the cleaning liquid tank as the cleaning liquid again to the exhaust gas passage, the auxiliary tank is connected to the water main through a valve operated by a water level sensor above the cleaning liquid tank. A scrubber characterized in that the auxiliary tank communicates with the washing tank through a valve operated by a water level sensor.   The scrubber according to claim 1, wherein the valve detects a water level with a float and is opened and closed by movement of the float.

Images