JPH0612465U - Immersion pickling equipment - Google Patents

Abstract

(57) [Summary] [Purpose] For pickling and deoxidizing, volatilize the pickling solution into the atmosphere,
(EN) Provided is an immersion type pickling apparatus which can be smoothly operated by eliminating evaporation well. [Structure] A cleaning tank with an exhaust duct that can be opened and closed at the top and a pickling solution supply that supplies and discharges the pickling solution to and from the cleaning tank
Same as the discharging means, the deoxidizing treatment liquid supply / discharging means for supplying / discharging the deoxidizing treatment liquid to / from the cleaning tank is provided.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a submerged pickling device used for descaling and rusting metal articles such as metal pipes.

[0002]

[Prior art]

 Conventionally, when removing scales, rust, etc. of metal pipes such as steel pipes and aluminum pipes by pickling, a pickling tank and a deoxidation treatment tank are installed respectively, and the metal pipe is immersed in the pickling tank to scale. Then, the metal pipe after pickling is removed from the pickling tank and put in the deoxidizing tank to wash off the pickling solution adhering to the metal pipe.

[0003]

[Problems to be solved by the device]

 However, in the above cleaning operation, when the metal pipe is taken out of the pickling tank, the tank is opened and the metal pipe is exposed to the atmosphere with the pickling solution adhering to the atmosphere. It is inevitable that the vapor will vaporize inside and the work environment will deteriorate due to the vapor.

Further, depending on the type of the pickling solution, corrosion of the building and peripheral equipment may be caused, and especially in the case of an automated line, it may cause a line stop and hinder production activities. .

An object of the present invention is to provide an immersion type pickling apparatus capable of performing pickling and deoxidizing smoothly by thoroughly removing volatilization and evaporation of the pickling solution into the atmosphere. .

[0006]

[Means for Solving the Problems]

 The immersion-type pickling device of the present invention is equipped with a cleaning tank with an exhaust duct connected and whose upper end can be opened and closed, and a pickling solution supply / discharge means for supplying / discharging the pickling solution to / from the cleaning tank. It is characterized in that it is provided with deoxidation treatment liquid supply / discharge means for supplying / discharging the acid treatment liquid.

[0007]

[Action]

 After putting the object to be cleaned in the cleaning tank, the pickling solution can be supplied to the tank with the upper end closed, and after the pickling, the pickling solution is deoxidized while maintaining the closed state. It can be replaced by a liquid, and during these operations, the gas that volatilizes and evaporates in the upper part of the cleaning tank, such as hydrochloric acid vapor, can be removed by suction from the exhaust duct. The pickling operation can be performed without using. Further, since the inside of the cleaning tank can be kept in a depressurized state during the work, leakage of hydrochloric acid vapor to the atmosphere can be avoided.

[0008]

【Example】

 An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is an explanatory sectional view showing an embodiment of the present invention.

In FIG. 1, reference numeral 1 denotes a cleaning tank, the opening of the upper end of which can be opened and closed by a rolling shutter-2. 3 is an exhaust duct connected to the cleaning tank 1, and 31 is an exhaust blower. Reference numeral 4 is a mount provided in the cleaning tank 1.

Reference numeral 5 denotes a pickling solution storage tank, which is disposed below the cleaning tank 1 and communicates with the bottom of the cleaning tank 1 via a pickling solution discharge valve 51 by a discharge pipe 52. Reference numeral 53 is a pickling solution supply pipe from the pickling solution storage tank 5 to the cleaning tank 1, and 54 is a pickling solution supply pump (pumping pump).

A deoxidation washing liquid storage tank 6 is arranged below the washing tank 1 and communicates with the bottom of the washing tank 1 through a deoxidation treatment liquid discharging valve 61 by a discharge pipe 62. Reference numeral 63 is a deoxidizing solution supply pipe from the pickling solution storage tank 6 to the cleaning tank 1, and 64 is a deoxidizing solution supply pump.

As the material of each of the tanks 1, 5 and 6, it is possible to use, for example, high sterloy, FRP lining steel plate, rubber lining steel plate or the like having excellent acid resistance and mechanical strength. Further, for the exhaust duct 3, for example, a vinyl chloride plate, a FRP lining steel plate, a stainless steel plate or the like having good acid resistance can be used.

The above-mentioned pickling apparatus can be used for washing various articles depending on the pickling solution used. When the object to be washed is a steel pipe, an aluminum tube, etc., hydrochloric acid, sulfuric acid, nitric acid, etc. are used as the pickling solution. To be done. To pickle a metal pipe with the above-mentioned pickling device, the metal pipe A is placed on a pedestal 4 in the washing tank 1, and then the opening of the washing tank 1 is closed by a rolling shutter-2. The cleaning tank is depressurized by driving the exhaust gas blower-31 (usually -5 to -30 mma), and the pickling solution supply pump 54 is driven to supply the pickling solution into the cleaning tank 1 while maintaining this depressurized state. Then, the metal tube A is immersed in the pickling solution, and this immersion is continued for a predetermined time (it depends on the concentration of the pickling solution, usually about 15 to 30 minutes) to dissolve the scale and the like from the metal tube A. To do.

After the lapse of the predetermined time, the pickling solution discharge valve 51 is opened, the pickling solution in the cleaning tank 1 is returned to the pickling solution storage tank 5, and the deoxidation treatment solution (water Is supplied to the cleaning tank 1 by driving the pickling supply pump 64, the metal pipe A is immersed in the deoxidizing solution, and the immersion is performed for a predetermined time (usually about 3 minutes). Continue to remove the acid pickling solution with metal pipe after pickling, then open the deoxidation solution discharge valve 61 and return the deoxidation treatment solution in the washing tank 1 to the deacidification solution storage tank 6 for washing. The rolling shutter-2 of the tank 1 is opened, the metal tube A is taken out, and the pickling operation is completed.

In the above, when the pickling solution in the cleaning tank 1 is returned to the pickling solution storage tank 5, as shown in FIG. it is preferable to perform the mounting location in the inclined state of the metal tube a into the flame easily handling of the cleaning tank height and the metal tube even in consideration, the inclination angle θ is preferably 5 ⁰ - 15 ^0.

In the above, the pickling solution storage tank and the depickling solution storage tank are arranged at a higher position than the cleaning layer, and the pickling solution or the deoxidation treatment solution is supplied to the cleaning tank by gravity flow. It is also possible to return the pickling solution or the deoxidized solution to the pickling solution storage tank or the depickling solution storage tank with a pump.

In the above, the gas sucked by the exhaust blower is subjected to acid mist treatment by a venturi scriber or the like to be recovered in a liquid phase.

[0018]

[Effect of device]

 The immersion-type pickling device of the present invention is configured as described above, and it is possible to perform pickling and deoxidation treatment with the cleaning tank closed, and to avoid direct contact of the pickling solution with the atmosphere. Volatilization and evaporation of the pickling solution to the outside air can be eliminated, and under the closed lid of the cleaning tank, the inside of the cleaning tank can be kept in a depressurized state. Since this can be prevented, the working environment can be maintained well and the buildings and surrounding facilities can be well preserved. Further, it is not necessary to transfer the object to be cleaned between the pickling tank and the deoxidizing treatment tank, workability is improved, and only one dipping tank is required, so that the equipment space can be reduced.

[Brief description of drawings]

FIG. 1 is an explanatory sectional view showing an embodiment of the present invention.

FIG. 2 is an explanatory view showing a mounted state of a metal pipe to be pickled by the device of the present invention.

[Explanation of symbols]

 1 Cleaning Tank 2 Rolling Shutter 3 Exhaust Duct 5 Pickling Solution Storage Tank 51 Pickling Solution Discharge Valve 52 Discharge Pipe 53 Pickling Solution Supply Pipe 54 Pickling Solution Supply Pump 6 Deoxidation Solution Tank 61 Deoxidation Solution Discharge Valve 62 Discharge pipe 63 Deoxidizer supply pipe 64 Deoxidizer supply pump

Claims (1)

[Scope of utility model registration request] 1. A washing tank having an upper end that can be opened and closed, connected to an exhaust duct, and a pickling solution supplying / discharging means for supplying / discharging the pickling solution to / from the cleaning tank. An immersion type pickling device characterized by being provided with a means for supplying and discharging a deoxidizing treatment liquid to be discharged.