JPH09117654A - Washing device for agitating tank - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve washing effect in an agitating tank, in a washing device for an agitating tank utilized in a chemical synthesis process or the like, by forming a rotation shaft, to which an agitating paddle is attached, into a hollow one and forcing washing liquid into the shaft to spray it from a spray nozzle into the agitating tank. SOLUTION: In an agitating tank 10, a rotation shaft 30 is disposed in an agitating vessel 20 and a plurality of agitating paddles 40 are arranged at a forward end of the shaft 30. For washing the tank 10, after agitated chemicals are drawn out of the vessel 20, a passage changeover valve placed at a lower opening 25 is closed. And while the shaft 30 is being rotated, an open/closure valve is opened to force washing liquid into the shaft 30. And the inside wall surface of the vessel 20 is washed with washing liquid sprayed from spray nozzles 31-33 and the outer circumferential surface of the shaft 30 is washed with washing liquid sprayed from a washing nozzle 34. At that time, residual, materials dissolved into the washing liquid are discharged from the vessel 20 through the passage changeover valve.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cleaning device for a stirring tank used in a chemical synthesis process, a food or pharmaceutical synthesis process, and the like.

[0002]

2. Description of the Related Art A typical stirring tank used for stirring chemical raw materials is a cylindrical stirring vessel 2 which can be rotated from the center to the bottom of a cylindrical stirring vessel 2 as shown in FIG. The rotating shaft 3 supported by the rotating shaft 3 is arranged, and a plurality of stirring paddles 4 are radially arranged in the vicinity of the tip of the rotating shaft 3 toward the inner wall surface of the stirring container 2. It is adapted to be rotated by a drive mechanism 5 provided on the end side.

By the way, such a stirring tank 1 is usually washed after every stirring operation. Was not washed,
If a substance that is agitated and mixed remains inside, the reaction ratio of the agitated chemical raw materials may change when a new agitation is performed, resulting in insufficient production or alteration of the produced substance. This is because there is a possibility.

Therefore, conventionally, when cleaning the stirring tank 1, a cleaning nozzle 7 is inserted and arranged through a plurality of dedicated nozzle holes 6 provided in the ceiling of the stirring container 2, and the cleaning nozzle 7
A cleaning liquid exhibiting strong acidity or alkalinity is sprayed from the above to chemically clean the residual substance remaining inside the stirring tank 1.

The cleaning nozzle 7 is arranged eccentrically with respect to the center of the stirring container 2 so as not to interfere with the rotary shaft 3, and a plurality of sprays are provided on the introduction pipe 7a arranged parallel to the rotary shaft 3. The stirring tank 1 is provided with a nozzle 7b and a sprinkler type rotating nozzle 7c provided at the tip of the introduction pipe 7a, and the cleaning liquid is pressure-injected from the proximal end side of the introduction pipe 7a protruding from the stirring container 2 to the outside. It is designed to spray inside.

[0006]

However, when the conventional cleaning nozzle 7 is used, the cleaning liquid is sprayed on the surface of the stirring paddle 4 or the tip and the base end of the rotary shaft 3 which are blind spots in the spray direction of the cleaning liquid. Could not be carried out, and the cleaning may not be performed sufficiently.

The present invention has been made in view of the above circumstances, and a cleaning device for a stirring tank capable of sufficiently cleaning the inside of the stirring tank by spraying the cleaning liquid over the entire inside of the stirring tank. The purpose is to provide.

[0008]

According to a first aspect of the present invention, there is provided a cleaning device for a stirring tank in which a rotating shaft having a stirring paddle is hollow, and the cleaning liquid is pressurized inside the rotating shaft. A spray nozzle for injecting the cleaning liquid into the stirring tank by injecting the cleaning liquid is provided.

In the agitation tank cleaning device according to the first aspect, the rotating shaft is rotated while the cleaning liquid is injected from the spray nozzle by injecting the cleaning liquid into the inside of the rotating shaft under pressure so that the entire inside of the agitation tank is covered. The inside of the stirring tank is washed by spraying a washing liquid.

According to a second aspect of the present invention, there is provided a cleaning device for a stirring tank in which a spray nozzle has a nozzle head in which a space communicating with the inside of a rotary shaft is formed, and the nozzle head has a cleaning liquid inside the rotary shaft. A plurality of injection holes are formed by injecting the cleaning liquid toward the periphery of the nozzle head and the surface of the rotating shaft on which the spray nozzle is arranged.

In the agitation tank cleaning device according to the second aspect of the present invention, the cleaning liquid pressure-injected into the rotary shaft flows into the space formed inside the nozzle head, and the cleaning liquid further surrounds the spray nozzle. And, it is sprayed in a mist form from a plurality of injection ports toward the surface of the rotating shaft on which the spray nozzle is arranged, and is sprayed on the inner wall surface, ceiling surface, bottom surface, and surface of the rotating shaft of the stirring container.

According to a third aspect of the present invention, there is provided a cleaning device for a stirring tank, which is directed to the outer peripheral surface of a rotary shaft downward along the outer peripheral surface of the rotary shaft, and injects a cleaning liquid into the rotary shaft under pressure. A rotary shaft cleaning nozzle for injecting the cleaning liquid along the outer peripheral surface of the rotary shaft is provided.

In the agitation tank cleaning device according to a third aspect of the present invention, the cleaning liquid pressurized and injected into the rotary shaft is jetted downward from the rotary shaft cleaning nozzle along the outer peripheral surface of the rotary shaft, and Sprayed on the surface.

According to a fourth aspect of the present invention, there is provided a stirring tank cleaning device, wherein a circulation hole communicating with the inside of the rotation shaft is formed in the vicinity of the upper end of the rotation shaft inside the stirring tank, and the circulation hole is surrounded by the circulation hole. A housing is provided that forms a relay space that is isolated from the internal space of the stirring tank, and supplies the cleaning liquid to the inside of the rotating shaft by pressurizing and supplying the cleaning liquid from the outside of the stirring tank to the relay space. Characterize.

In the agitation tank cleaning device according to the fourth aspect, the relay space is filled with the cleaning liquid by pressurizing and supplying the cleaning liquid from the outside of the agitation tank to the space formed inside the housing, and further the cleaning liquid. Is circulated through the flow hole and injected under pressure into the rotary shaft. The cleaning liquid pressurized and injected into the rotary shaft is sprayed from a spray nozzle or a rotary shaft cleaning nozzle.

[0016]

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of a cleaning apparatus for a stirring tank according to the present invention will be described in detail with reference to FIGS.
In a stirring tank 10 shown in FIG. 1, a rotating shaft 30 rotatably supported inside a stirring container 20 is arranged.
A plurality of stirring paddles 40 are arranged in the vicinity of the front end of 0, and the rotating shaft 30 is rotated by a drive mechanism 50 provided on the base end side thereof.

The stirring container 20 has a cylindrical shape, and its ceiling portion 21 and bottom portion 22 each have a spherical shape so as to bulge outward. An upper opening 23 is formed in the center of the ceiling portion 21 so as to project upward toward the vertical axis of the stirring container 20, and the rotary shaft 30 is inserted and arranged through the upper opening 23 so as to match the axis. ing. Further, a chemical material carrying-in port 24 is formed near the upper opening 23. Similarly, the bottom portion 22 is formed with a lower opening 25 projecting downward toward the vertical axis of the stirring container 20, and a flow path switching valve (not shown) is arranged in the lower opening 25 and further formed at the further end thereof. A flow path for the substance and a flow path for the cleaning liquid are provided.

The rotary shaft 30 has a tubular shape with a hollow inside, and is rotatably connected to the drive mechanism 50 attached to the upper opening 23 at the base end side, and a plurality of stirring paddles 40 are provided near the tip. It is arranged.

The stirring paddles 40 each have a rectangular shape and are arranged radially toward the inner wall surface of the stirring container 20.

A plurality of spray nozzles 31 are arranged at intervals on the outer peripheral surface of the rotary shaft 30, and a spray nozzle 32 is arranged at the tip of the rotary shaft 30 at the joint between the rotary shaft 30 and the stirring paddle 40. A spray nozzle 33 is arranged, and a rotary shaft cleaning nozzle 34 is arranged near the upper end of the rotary shaft 30 inside the stirring tank 10.

As shown in FIG. 2, the spray nozzle 31 has a substantially spherical nozzle head 31b in which a space 31a communicating with the hollow portion of the rotary shaft 30 is formed. The nozzle head 31b has a spray head 31b. A plurality of ejection ports 31c for ejecting the cleaning liquid in a mist shape toward the periphery of the nozzle 31 and the surface of the rotating shaft 30 are formed.

The spray nozzle 32 is the spray nozzle 3
The cleaning liquid has a shape similar to that of No. 1 and sprays the cleaning liquid in the form of mist toward the periphery of the spray nozzle 32 and the bottom portion 22 of the stirring container 20.

As shown in FIG. 3, in the spray nozzle 33, a nozzle head 33b having a space 33a communicating with the hollow portion of the rotary shaft 30 is arranged along both sides of the stirring paddle 40. The nozzle head 33b is formed with a plurality of ejection ports 33c for ejecting the cleaning liquid toward the side surface of the stirring paddle 40.

As shown in FIG. 4, the rotary shaft cleaning nozzle 34 has a bulging portion 34 formed on a part of the outer peripheral surface of the rotary shaft 30.
a has a plurality of injection ports 34
c is formed. These injection ports 34c are connected to the rotary shaft 30.
Is formed so as to communicate with the hollow portion of the shaft and extend downward along the outer peripheral surface of the rotary shaft 30.

As shown in FIGS. 5 and 6, the rotary shaft 30 positioned above the rotary shaft cleaning nozzle 34 is formed with a plurality of flow holes 35 which communicate with the inside of the rotary shaft 30. A relay space 36, which is isolated from the internal space of the stirring tank 10, is formed around the circulation hole 35, and the cleaning liquid is pressurized and supplied from the outside of the stirring tank 10 to the inside of the rotary shaft 30. A housing 37 is provided to allow the cleaning liquid to flow in.

The housing 37 is provided with an inlet pipe 3 for pressurizing and supplying a cleaning liquid from the outside of the stirring tank 10 to the relay space 36.
8 are connected to each other, and an opening / closing valve 39 is provided in the introduction pipe 38. A seal member 37a is arranged between the housing 37 and the rotary shaft 30.

The drive mechanism 50 is fixed to the upper opening 23, supports the rotary shaft 30, and transmits a drive force to the rotary shaft 30 to rotate the drive force. An electric motor 52 that rotates the rotating shaft 30 via a transmission unit 51.

In the agitating layer cleaning apparatus constructed as described above, the agitated chemical substance is extracted from the agitating vessel 20, and the flow path switching (not shown) disposed in the lower opening 25 in a state where the vessel is emptied Close the valve. Then, while rotating the rotating shaft 30, the on-off valve 39 is opened to open the rotating shaft 30.
The cleaning liquid is injected under pressure into the spray nozzles 31, 3
2, 33 and the rotary shaft cleaning nozzle 34 are used for jetting.

The cleaning liquid sprayed from the spray nozzle 31 scatters around the spray nozzle 31, and the inner wall surface of the stirring container 20 facing the spray nozzle 31 and the portion of the rotary shaft 30 where the spray nozzle 31 is arranged. Be sprayed on.

The cleaning liquid sprayed from the spray nozzle 32 is scattered around the spray nozzle 32 and is sprayed on the inner bottom surface of the stirring container 20 facing the spray nozzle 32.

The cleaning liquid sprayed from the spray nozzle 33 is sprayed on both side surfaces of the stirring paddle 40.

The cleaning liquid sprayed from the rotary shaft cleaning nozzle 34 is sprayed onto the outer peripheral surface of the rotary shaft 30.

The cleaning liquid sprayed from the spray nozzles 31 and 32 is sprayed over the entire circumference of the inner wall surface of the stirring container 20 due to the rotation of the rotary shaft 30.

The cleaning liquid sprayed on the inside of the stirring container 20 dissolves the remaining residual substances. The dissolved residual substance flows down together with the cleaning liquid and collects in the lower part of the stirring container 20, so that a flow passage switching valve (not shown) is opened and the cleaning liquid in which the residual substance is dissolved is discharged to the outside.

By carrying out the cleaning work as described above,
The substance remaining inside the stirring container 20 is washed. If necessary, this washing operation is repeated. When the cleaning work is completed, the inside of the stirring container 20 is neutralized with a neutralizing agent.

According to the agitation tank cleaning apparatus of the present invention, the rotating shaft 30 located at the center of the agitating container 20 is hollow, and the rotating shaft 30 is provided with the spray nozzles 31, 32, 33 and the rotating shaft cleaning nozzle 34, respectively. The spray nozzles and the rotary shaft cleaning nozzles 3 are arranged by injecting the cleaning liquid into the rotary shaft 30 under pressure while rotating the rotary shaft 30.
Since the cleaning liquid is sprayed from 4 as a mist, the cleaning liquid can be sprayed all over the inside of the stirring tank 10 without creating a blind spot. Therefore, the substance remaining inside the stirring container 20 can be dissolved to sufficiently wash the inside of the stirring tank 10.

In particular, the spray nozzles 31, 32, 33
Sprays the cleaning liquid in the form of mist from the injection ports 31c, 32c, 33c toward the periphery of the spray nozzle and the surface of the rotary shaft 30 on which the spray nozzle is arranged.
The cleaning liquid can be sprayed all over the inner wall surface, the ceiling surface, the bottom surface, and the surface of the rotating shaft of the stirring container 20 facing the spray nozzle.

In particular, the rotary shaft cleaning nozzle 34 has the injection port 3
Since the cleaning liquid is sprayed downward from 4c along the outer peripheral surface of the rotary shaft 30, the cleaning liquid can also be sprayed on the surface of the rotary shaft 30.

The relay space 36 is filled with the cleaning liquid by pressurizing and supplying the cleaning liquid from the outside of the stirring tank 10 to the relay space 36 formed inside the housing 37, and the cleaning liquid flows through the flow hole 35. Since it flows into the inside of the rotating shaft 30, the cleaning liquid can be pressurized and injected into the inside of the rotating shaft 30 while rotating the rotating shaft 30, and the cleaning liquid can be jetted from each spray nozzle and the rotating shaft cleaning nozzle 34.

[0040]

According to the cleaning device for the stirring tank of the first aspect, while the rotating shaft is being rotated, the cleaning liquid is injected under pressure into the hollow rotating shaft so that the cleaning liquid is disposed on the rotating shaft. Since the cleaning liquid is sprayed from the spray nozzle, the cleaning liquid can be sprayed all over the inside of the stirring tank without creating a blind spot. Therefore, the inside of the stirring tank can be sufficiently washed.

According to the agitation tank cleaning device of the second aspect, the cleaning liquid is sprayed from the plurality of injection holes formed in the spray nozzle toward the periphery of the spray nozzle and the surface of the rotary shaft on which the spray nozzle is arranged. Since the mist is sprayed, the cleaning liquid can be sprayed all over the inner wall surface, the ceiling surface, the bottom surface, and the surface of the rotating shaft of the stirring container facing the spray nozzle.

According to the agitation tank cleaning device of the third aspect, since the cleaning liquid is sprayed downward from the rotary shaft cleaning nozzle along the outer peripheral surface of the rotary shaft, the cleaning liquid is also sprayed on the surface of the rotary shaft. be able to.

According to the agitation tank cleaning device of the fourth aspect, the relay space is filled with the cleaning liquid by pressurizing and supplying the cleaning liquid from the outside of the agitation tank to the relay space formed inside the housing. Since the cleaning liquid flows through the circulation hole and flows into the inside of the rotating shaft, while the rotating shaft is being rotated, the cleaning liquid is pressure-injected into the rotating shaft and the cleaning liquid is jetted from each spray nozzle and the rotating shaft cleaning nozzle. You can

[Brief description of the drawings]

FIG. 1 is a vertical cross-sectional view showing an embodiment of a stirring tank cleaning device according to the present invention.

FIG. 2 is a vertical cross-sectional view showing a spray nozzle 31 of the stirring tank cleaning device in FIG.

FIG. 3 is a vertical cross-sectional view showing a spray nozzle 33 of the stirring tank cleaning device in FIG.

4 is a vertical cross-sectional view showing a rotary shaft cleaning nozzle 34 of the stirring tank cleaning device in FIG.

5 is a housing 3 of the agitation tank cleaning device in FIG.
7 is a cross-sectional view showing No. 7.

FIG. 6 is a housing 3 of the agitation tank cleaning device in FIG.
7 is a vertical sectional view showing FIG.

FIG. 7 is a longitudinal sectional view showing an example of a conventional stirring tank cleaning device.

[Explanation of symbols]

 10 Stirring Tank 20 Stirring Container 30 Rotating Shaft 31, 32, 33 Spray Nozzle 31a, 33a Space 31b, 33b Nozzle Head 31c, 33c Jet Port 34 Rotating Shaft Cleaning Nozzle 35 Flow Hole 36 Relay Space 37 Housing 40 Stirring Paddle 50 Drive Mechanism

Claims (4)

[Claims] 1. A washing device for a stirring tank used in a chemical synthesizing process, a synthesizing process of foods, pharmaceuticals, etc., wherein a rotating shaft to which a stirring paddle is attached is hollow, and the rotating shaft has an inner portion of the rotating shaft. An agitation tank cleaning device comprising a spray nozzle for injecting the cleaning solution into the agitation tank by injecting the cleaning solution under pressure into the agitation tank. 2. The spray nozzle has a nozzle head in which a space communicating with the inside of the rotary shaft is formed, and the cleaning liquid is injected into the inside of the rotary shaft by pressurizing the cleaning liquid into the nozzle head. The cleaning device for a stirring tank according to claim 1, wherein a plurality of injection holes are formed to inject toward the periphery of the nozzle head and the surface of the rotating shaft on which the spray nozzle is arranged. 3. The outer peripheral surface of the rotating shaft is directed downward along the outer peripheral surface of the rotating shaft, and the cleaning liquid is injected under pressure into the rotating shaft to inject the cleaning liquid along the outer peripheral surface of the rotating shaft. 3. A stirring tank cleaning device according to claim 1, further comprising a rotating shaft cleaning nozzle for spraying the liquid. 4. A circulation hole communicating with the inside of the rotating shaft is formed in the vicinity of the upper end of the rotating shaft inside the stirring tank, and the internal space of the stirring tank is formed around the circulation hole. 2. A housing is provided, which forms an isolated relay space, and supplies the cleaning liquid to the interior of the rotary shaft by pressurizing and supplying the cleaning liquid from the outside of the stirring tank to the relay space. The cleaning device for a stirring tank according to any one of 2 and 3.