CN103305859B - Cyclic acid pickling device and method of trough type pickling tank - Google Patents
Cyclic acid pickling device and method of trough type pickling tank Download PDFInfo
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- CN103305859B CN103305859B CN201310258857.9A CN201310258857A CN103305859B CN 103305859 B CN103305859 B CN 103305859B CN 201310258857 A CN201310258857 A CN 201310258857A CN 103305859 B CN103305859 B CN 103305859B
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Abstract
The purpose of the invention is to provide a cyclic acid pickling device of a trough type pickling tank and a cyclic acid pickling method of a trough type pickling tank. Rusts and other impurities adhering to the inner and outer surfaces of a pipeline can be efficiently removed through the device and the method provided by the invention; the production cost is reduced and the discharge of waste acids is reduced because the acid pickling solution is cyclically filtered and used repeatedly; and therefore, actual use effects of energy conservation and emission reduction are achieved. According to the invention, the processes of soaking acid pickling, side spray forced cyclic acid pickling, cyclic acid pickling by injecting an acid into a pipeline and acid pickling by spraying outside the pipeline are adopted to performing multi-directional acid pickling on the pipeline, and the acid pickling effect on the pipelines which are deep in rusting degree, large in pollutant adsorption quantity, and multiply bent are especially obvious; simultaneously, a method of cyclically filtering and recycling the acid pickling solution and complete covering with soft plastics is adopted, so that the purposes of energy conservation and emission reduction are achieved.
Description
Technical field
The invention belongs to tubing pickling technical field, especially relate to and can carry out pickler that soak acid-cleaning and inner-outer circulation pickling combine and method to partial precast shaped pipe, special-shaped material etc.
Background technology
The steel pipe that the medium transport tubing system such as lubrication, hydraulic pressure, oxygen adopts all to need before construction or prefabricated after carry out pickling operation, next step in-site installation stage can be dropped into, because invest little, acid cleaning process is simple, what therefore current pipe pickling generally adopted is the pickling of trough-type acid wash pool, but the reasons such as the pipe shape due to Dipping process acid solution poor fluidity, needs cleaning is different cause pickling quality poor, residual rusty stain and dirt directly have influence on the degree of cleaning of medium, and serious even can cause systemic breakdown.Before construction, the pickling of finished product tubing is because be all straight tube, and difficulty of construction mainly concentrates on acid solution poor fluidity, and pipe interior is difficult to the aspects such as complete pickling puts in place; Impurity in the pickling tub dirt entered bottom pipeline depths, particularly pickling tub accumulates and is difficult to process.Pipeline after in-situ precast is welded with elbow, pipe bending is many, and after putting into pickling tub, section of tubing does not immerse in acid solution, cannot carry out pickling, turns around pickling bottom, then to cause pipe interior corrosion more serious afterwards as adopted first pickling top again.Therefore can only adopt online pipe pickling, and online pickling needs to make interim pipeline, construction cost is high, simultaneously once pipeline exists leakage, pollutes large, therefore generally do not adopted by unit in charge of construction site environment.
Summary of the invention
In order to solve the problem, the object of the present invention is to provide a kind of apparatus and method of trough-type acid wash pool cycle pickling, efficiently can remove the corrosion and other foreign material that stick to pipeline surfaces externally and internally, and by reusing the circulating filtration of pickle solution, reduce production cost, reduce the discharge of spent acid, realize the practical effect of energy-saving and emission-reduction.
In order to reach above object, the invention provides following technical scheme:
A kind of trough-type acid wash pool circulating pickling device, comprise the shallow pond of pickling and the dark pond of pickling, shallow pond and Shen Chi are arranged side by side, length and width are identical, have at the bottom of pond, shallow pond at the bottom of gradient bottom surface, pond and be provided with waffle slab, be provided with flashboard between dark pond and shallow pond, the bottom in shallow pond, higher than the height of dark pond acid solution, is provided with cover plate above shallow pond and dark pond; Be provided with triangle-frame above the shallow pond of pickling and the dark pond of pickling, triangle-frame is provided with pickling collector, and triangle-frame is driven by electric motor and moves between pickling Shen Chi position and the shallow pond of pickling; Pickling collector to be responsible for acid proof pump by divider and to be connected; The one end in the shallow pond of pickling is provided with side spray plate, side spray plate is provided with side spray nozzle, and side spray nozzle is responsible for acid proof pump by side spray pickling pipeline and is connected; Acid solution passage and flashboard is provided with between the shallow pond of described pickling and the dark pond of pickling.
As a kind of improvement project of trough-type acid wash pool circulating pickling device, between the dark pond of described pickling and the shallow pond of pickling, be provided with filter screen.
As a kind of improvement project of trough-type acid wash pool circulating pickling device, plane perpendicular direction is also provided with filter screen in described pickling dark pond.
As a kind of improvement project of trough-type acid wash pool circulating pickling device, described triangle-frame is provided with the transparent plastics curtain be crisscross arranged.
As a kind of improvement project of trough-type acid wash pool circulating pickling device, described flashboard is blind plate, top perforate flashboard or bottom perforate flashboard.
A kind of trough-type acid wash pool cycle pickling method, uses the trough-type acid wash pool circulating pickling device in claim 1 ~ 5 described in any one to complete, comprises the steps:
(1) soak acid-cleaning will treat that pickling tubing device for hoisting is in the shallow pond of pickling, cut off the acid solution path in the shallow pond of pickling and dark pond, open acid proof pump, open side spray magnetic valve, acid solution is responsible for pickling through filter pump by dark pond under the effect of pump, through side spray acid pickling tube road direction pickling shallow pond acid filling, after liquid level reaches pickling tub setting height, acid proof pump quits work;
(2) pressurized air purges the rapid-acting coupling of removing above lateral jet pipe, access compressed-air actuated flexible pipe, open pressurized air main valve, pressurized air sprays from another group nozzle of side spray, by the residual acid solution blowout treating pickling tube surfaces and inside after step (1) process;
(3) acid mist in exhaust blower eliminating pickling tub is opened in air draft.
As a kind of improvement project of trough-type acid wash pool cycle pickling method, the step of being interrupted pickling is also comprised: after soak acid-cleaning between described step (1) and step (2), open the flashboard between the shallow pond of pickling and the dark pond of pickling, acid solution under gravity, flow to dark pond, open acid proof pump, pickling side spray carries out the pickling of interruption side spray according to the timed interval of presetting.
As a kind of improvement project of trough-type acid wash pool cycle pickling method, in the step of described interruption pickling, also comprise the step to the pickling of pipe interior discontinuity acid filling.
As a kind of improvement project of trough-type acid wash pool cycle pickling method, in the step of described interruption pickling, also comprise the step of being carried out being interrupted pickling by pickling top spray.
As a kind of improvement project of trough-type acid wash pool cycle pickling method, when pipeline inner rust erosion, greasy dirt heavier time, continuous pickling step is also comprised: the throttling valve regulating each pickling magnetic valve rear end after interruption acid pickling step, opening is adjusted to maximum, open acid proof pump, select at least one in side spray, top spray, inner pickling, continuous pickling.
Owing to have employed above-mentioned technical scheme, the present invention compared with prior art, there is following advantage and positively effect: adopt soak acid-cleaning, side spray forced circulation pickling, pipe interior acid filling cycle pickling, pipeline external spray pickling Technology to carry out multi-faceted pickling to pipeline, dark to corrosion degree, dirt adsorptive capacity large, bending many pipe pickling effects are especially obvious, simultaneously to the method that pickling circulating filtration recycling, nonrigid plastic cover comprehensively, reach the object of energy-saving and emission-reduction.As long as be less than pickling tub length (being generally 9-10 rice) to its length of prefabricated pipeline, be highly less than 5 meters, width all can adopt this method to carry out pickling within pickling tub groove width.In addition, method provided by the invention is applicable equally to pipeline degreasing, passivation technology flow process.
Accompanying drawing explanation
Fig. 1 is trough-type acid wash pool circulating pickling device external structure schematic diagram provided by the invention;
Fig. 2 is the right view of Fig. 1;
Fig. 3 is the vertical view of Fig. 1;
Fig. 4 is the cross section view in the shallow pond of pickling and the dark pond of pickling;
Fig. 5 is the cross section view in the shallow pond of pickling;
Fig. 6 is the vertical view of Fig. 5;
Fig. 7 is side spray plate structure schematic diagram;
Fig. 8 is the acid proof pump structural representation on triangle-frame.
Reference numerals list:
The shallow pond of 1-, 12-waffle slab, 13 side spray plates, 14-side spray stationary installation, 15-side spray header frame, 16-side spray nozzle, the dark pond of 2-, 3-flange, 4-pickling collector, 5-triangle-frame, 6-planker electric motor, 7-shower, 8-tooth bar, 9-shallow pond cover plate, 10-plastic drapery, 31-shallow pond nylon cell body, 32-framework, 33-cement structures, 34-dark pond nylon cell body, 35-filter screen bracket slot, 36-support handle, 37-large granular impurity filtering net, 38-filter screen stand, 39-lightweight filtering net, 40-filters lightweight and pollutes acid solution passage, 41-filters macrobead and pollutes acid solution passage, 42-flashboard, 58-acid proof pump, 59-motor.
Embodiment
The present invention provide firstly a kind of trough-type acid wash pool circulating pickling device, as shown in Figure 1, Figure 2, Fig. 3, Fig. 4, Fig. 5, Fig. 6, shown in, comprise the shallow pond of pickling 1 and the dark pond 2 of pickling, shallow pond 1 and dark pond 2 skin are cement structures 33, internal layer has shallow pond nylon cell body 31 and dark pond nylon cell body 34 respectively, prevents acid liquid corrosion and seepage.Shallow pond and Shen Chi are arranged side by side, and length and width are identical, and the shallow pond of pickling is pickling operating pool, and the effect in dark pond is the effect that storage, allotment, acid cycle filter.The degree of depth in dark pond is 2-3 times of shallow pond, and to form the drop of acid solution flowing, as shown in Figure 5, shallow pond has gradient bottom surface at the bottom of pond, is beneficial to flow into dark pond after residue flow to bottom from high to low under the effect of acid solution stream.Framework 32 is provided with bottom shallow pond, adapt with shallow pond bottom shape bottom framework 32, framework 32 top level, which is provided with waffle slab 12, waffle slab 12 by unsettled for pickling article (pipeline) as in acid solution, can keep pipeline higher than bottom the shallow pond of pickling, the impurity bottom shallow pond can be avoided to enter in pickling tubing, also be conducive to being deposited in the impurity of bottom under the acid solution thrust of side spray, flow to lower by the eminence in shallow pond, eventually pass filter screen and be back to dark pond, play the effect of circulating filtration.
Should have acid solution passage and flashboard 42 between shallow pond and dark pond, acid solution passage is used for the acid solution in shallow pond to lead dark pond, and flashboard circulates for the acid solution cut off between shallow pond and dark pond.Flashboard 42 can block acid solution passage, and the bottom in shallow pond is higher than the height of dark pond acid solution, and the acid solution opening the shallow pond of flashboard 3 under the effect of deadweight, can be flowed directly to dark pond.
As a modification of the present invention scheme, between described dark pond and shallow pond, the filter screen that can filter out impurities should be provided with.Specifically, as shown in Figure 4, have between dark pond and shallow pond and filter lightweight and pollute acid solution passage 40 and filter macrobead and pollute acid solution passage 41, filtering macrobead pollution acid solution passage 41 one end is arranged on bottom shallow pond, the other end leads to Shen Chi, filter lightweight pollution acid solution passage 40 one end and be arranged on middle and upper part, shallow pond, the other end leads to Shen Chi.Large granular impurity filtering net 37 and lightweight filtering net 39 is also provided with between shallow pond and dark pond, inherent filtration lightweight is polluted the acid solution that acid solution passage 40 refluxes and flow into dark pond after lightweight filtering net 39 and large granular impurity filtering net 37 is filtered, by lightweight filtering net 39 filtering when the light impurities swimming in acid solution middle and upper part refluxes with acid solution; The acid solution that inherent filtration macrobead pollutes the backflow of acid solution passage 41 flows into dark pond, by large granular impurity filtering net 37 filtering when the large granular impurity (residue) accumulated in during pickling bottom shallow pond refluxes with acid solution after filtering with large granular impurity filtering net 37.Large granular impurity filtering net 37 is coarse particles filtration, and filter screen precision is 200 order-80 orders; Lightweight filtering net 39 can adopt the sponge etc. of filter cloth, INVENTIONPaper filter net or excellent adsorption to make; Be provided with cover plate above shallow pond and dark pond, to prevent in pond acid solution volatilization, all cover plates all adopt nylon material to make, and are divided into 7-10 block according to the length of pickling tub, the operation of lid of being convenient to manually to uncap, close.
As a modification of the present invention scheme, as shown in Figure 4, also filter screen is provided with in dark pond, filter screen is arranged on plane perpendicular direction, dark pond, filter screen adopts stainless steel filtering net, be provided with threaded hole in the surrounding of filter screen stand 38, filter screen is fixed by bolts on filter screen stand 38 by the filter screen pressing plate of bolt through " day " font.Dark pond is divided into Xi Suan district and Hui Suan district at pickling dark pond length direction by filter screen, and the acid solution flowing to dark pond from shallow pond, after strainer filtering dark pond, just can enter in the acid suction hose of acid proof pump 58, sucks acid proof pump to avoid impurity.Filter screen stand 38 is inserted in filter screen bracket slot 35, and filter screen stand 38 top has support handle 36, is convenient to filter screen stand to take out cleaning from dark pond.
Flashboard 42 is made up of nylon sheet, has three kinds of forms.Be top perforate (to pollute acid solution passage 40 corresponding with filtration lightweight) respectively, only corresponding lightweight filters use; Bottom perforate (to pollute acid solution passage 41 corresponding with filtration macrobead), only corresponds to macrobead and filters use; All do not have perforate up and down, play the effect of blind plate, blind plate can cut off the acid solution path between the shallow pond of pickling and the dark pond of pickling.When pickling tub to newly purchase tubing only make soak acid-cleaning time, only need will all there is no the path cutting off acid solution between the shallow pond of pickling and the dark pond of pickling in flashboard 42 insertion groove of perforate to bottom up and down, start acid proof pump, opening side spray manifold magnetic valve, when pickle solution liquid level is higher than tubing height, just soak acid-cleaning flow process can be carried out; During cycle pickling, can according to the type of the greasy dirt corrosion degree of tubing and most of impurity, select top perforate flashboard or bottom perforate flashboard, be convenient to the filtering of different impurities in acid cleaning process: the path of acid solution between the shallow pond of pickling and the dark pond of pickling will be cut off in flashboard insertion groove to bottom, start acid proof pump, opening side spray manifold magnetic valve, carries out pickling.Perforate flashboard in top also effectively can avoid that shallow pond liquid level is too high causes excessive sour accident.Pore size, the quantity of flashboard perforate can be arranged as required, can control the acid solution flow velocity of tapping like this.
Triangle-frame 5 is provided with above the shallow pond of pickling and the dark pond of pickling, the transparent plastics curtain 10 that triangle-frame 5 is provided with pickling collector 4, is crisscross arranged, the displacement of tripod adopts Electric Traction, planker electric motor 6 drives step-down gear, gear, under the effect of rack-and-pinion 8, drive triangle-frame transverse shifting between pickling Shen Chi position and the shallow pond of pickling, the switching realizing technique prepares.The pickling collector 4 be located on triangle-frame is connected with each shower 7 by flange 3, and shower 7 comprises pickling top spray pipe, internal recycle acid pickling tube.All pickling collectors 4 all adopt acidproof tubing to make, be connected with the supervisor of acid proof pump 58 respectively by divider, the acid suction hose of acid proof pump is the flexible pipe that flange 3 connects, hose end is provided with vacuum breaker, after every pickling end of job, acid suction hose need be taken out as in clear water, carry out water flushing to pickling collector, reduce the corrosion of residual acid solution to collector and acid proof pump.As shown in Figure 8, acid proof pump 58 is driven by motor 59, acid proof pump 58 has acid suction hose, and acid suction hose sprays eventually through corresponding shower 7 after flowing into collector respectively by top spray collector magnetic valve 51, inner pickling collector magnetic valve 52 and side spray collector magnetic valve 53 after sucking acid solution from dark pond.
As shown in Figure 5, the one end in the shallow pond of pickling 1 is provided with side spray plate 13(side spray plate and is arranged on one end more shallow at the bottom of pond), as shown in Figure 7, side spray plate 13 is arranged on the sidewall of pickling shallow pond 1 by side spray stationary installation 14, side spray plate 13 is provided with side spray header frame 15, be provided with side spray collector in framework, side spray header frame 15 be provided with some side spray nozzles 16, the acid solution flowed out from side spray collector is sprayed in the shallow pond of pickling by nozzle.
Pickling is provided with exhaust blower in shallow pond, and the air outlet of exhaust blower is placed in tap water through multiple nozzle.
Trough-type acid wash pool provided by the invention comprises the following steps the method that tubing carries out cycle pickling:
A. first soak acid-cleaning opens the cover plate 9 in the shallow pond of pickling, first will treat on the grid platform of pickling tubing device for hoisting in the shallow pond of pickling, flashboard (adopting blind plate) is inserted in the partition grooves in the middle of the shallow pond of pickling and dark pond here, cut off the path in the shallow pond of pickling and dark pond.Open acid proof pump, open side spray magnetic valve, acid solution is responsible for pickling through filter pump by dark pond under the effect of pump, through side spray acid pickling tube road direction pickling shallow pond acid filling, after liquid level reaches pickling tub setting height, stops acid proof pump.Treat that pickling tubing soaks 3-4 hour (soak time can adjust according to acid strength and tubing greasy dirt amount) in acid solution, pickle solution is treated pickling tube surfaces and is carried out shallow-layer pickling.
B. be interrupted pickling after soak acid-cleaning, open the flashboard between the shallow pond of pickling and the dark pond of pickling, acid solution under gravity, flow to dark pond, open acid proof pump, pickling side spray starts to be interrupted pickling, under the time relay controls, the timed interval according to presetting carries out side spray pickling.For when before construction, tubing carries out pickling, this step also can be omitted.
As a kind of improvement project of step B, this step also comprises the step to the pickling of pipe interior discontinuity acid filling, the pickling of pipe interior acid filling adopts Temporary connections line of communication, one end of Temporary connections connects acid filling collector, the other end adopts the flange welding matched with the existing flange of pipeline to become cycle pickling temporary pipeline, Temporary connections also can be inserted the endoporus treating pickling pipeline by the pipeline that less or internal diameter and Temporary connections external diameter are close for internal diameter, and is fixed installation with nylon rope, iron wire.Open inner pickling collector magnetic valve, acid solution is carried out after acid liquor filtering through fore filter under acid proof pump effect, through acid picking pump to main pipeline, through inner pickling collector magnetic valve, flow to each acid filling arm, high pressure acid solution is sprayed onto and treats pickling internal diameter of the pipeline, force acid solution in the flowing of pickling tub inwall, reach pickling object.
As a kind of improvement project of step B, also comprise the step of being carried out being interrupted pickling by pickling top spray, top spray step is the pipeline external spray pickling step hereinafter mentioned.Above-mentioned interruption side spray, interruption wash-in and interruption top spray step can be carried out according to the sequence alternate of setting, also can carry out simultaneously.
C. continuous pickling is when pipeline rust, greasy dirt are more, also needs to carry out continuous pickling step.Regulate the throttling valve of each pickling magnetic valve rear end, opening is adjusted to maximum, open acid proof pump, now according to pipeline rust situation, continuous side spray, continuously top spray and continuous inner pickling can be selected, side spray, top spray, inner pickling also can be selected all to open, continuous pickling 1-2 hour, stop acid proof pump, acid solution under gravity, is all back to dark pond.
When pipeline fails to immerse in acid solution completely, also need after step C, carry out pipeline external spray pickling step, pipeline external spray pickling technique adopts spray principle to carry out pickling, spray pickling is carried out for the pipeline external surface that cannot immerse acid solution, open top spray collector magnetic valve, acid solution is carried out after acid liquor filtering through fore filter under acid proof pump effect, acid picking pump is to main pipeline, through top spray collector magnetic valve, flow to each spray arm, high pressure acid solution is sprayed onto and treats pickling pipeline external surface, reach the object of pickling.Can acid mist be produced due to during spray, so be provided with the transparent plastics curtain of rain, some ribbon plastic curtain of rain staggered arrangement, constitute special zone of protection, avoid operator to suck acid mist and cause personal injury, the ribbon plastic curtain of rain is arranged on tripod, moves with tripod.
Preferably arrange perforate flashboard when interruption or continuous pickling between dark pond and shallow pond, the impurity that the selection of perforate flashboard can be filtered according to actual needs is selected.In the whole process of pickling, the flow of acid proof pump should be controlled, ensure that liquid level can remain in the altitude range of setting all the time, avoid acid proof pump to inject the amount of acid solution and be greater than the amount that is back to the dark pond of pickling and cause excessive sour accident.
D. pressurized air purge when the pickling of pipeline surfaces externally and internally all with reach setting requirement after, stop the work of acid proof pump, acid solution all flow to dark pond under gravity, remove the rapid-acting coupling above lateral jet pipe, access compressed-air actuated flexible pipe, open pressurized air main valve, pressurized air sprays from another group nozzle of side spray, by pipe surface and inner residual acid solution blowout.
E. to terminate acid mist in the shallow pond of now pickling larger in pickling, need open exhaust blower, the air suction inlet of exhaust blower is placed in pickling region, and the air outlet of exhaust blower is placed in tap water through multiple nozzle, dissolve with tap water, this tap water will be used as in the complex acid operation of pickling tub in the later stage.After acid pickling tube substantially dries up under compressed-air actuated effect, pickling tripod shifts out, and electric block hangs out acid pickling tube road, and is resetted by shallow for pickling pond cover plate, and the pickling end of job, enters downstream.
Because shallow pond is working district, in whole acid cleaning process, easily produce a large amount of acid mists above shallow pond, therefore should open electric motor and triangle-frame be moved to above the shallow pond of pickling, triangle pickling framework and be staggered installation of superincumbent plastic drapery and can prevent acid mist from spreading.After each pickling terminates, pickling pipe support need be hung out, the shallow pond of pickling is cleared up, now need tripod to be shifted, easy access workman removal treatment,
Below in conjunction with the drawings and specific embodiments, illustrate the present invention further, following embodiment should be understood and be only not used in for illustration of the present invention and limit the scope of the invention.
Embodiment 1
For the pickling of construction preceding pipeline batch: first need inspection to treat pickling pipeline surfaces externally and internally situation, if newly purchase pipeline (being generally the straight tube of 5-9 rice), surface does not have greasy dirt, paint, the stifle of pipeline or plastic closures is only needed to open, keep unimpeded before and after pipeline, if greasy dirt is many in tube surfaces or tube wall, then need to carry out degreasing operation in advance.Treat that pickling operation can be carried out in the oil removal rear of surfaces externally and internally.
Open shallow pond cover plate, to treat that pickling pipeline to winch to bottom the shallow pond of pickling on waffle slab, close the path in the shallow pond of pickling and dark pond, flashboard is inserted in the partition grooves in the middle of the shallow pond of pickling and dark pond, open electric motor and triangle-frame is moved to position, pickling shallow pond, open acid proof pump, open side spray magnetic valve, acid solution is responsible for pickling through filter pump by dark pond under the effect of pump, through side spray acid pickling tube road direction pickling shallow pond acid filling, after liquid level reaches pickling tub setting height, stop acid proof pump.
Tubing soaks 3-4 hour in acid solution, and pickle solution is treated pickling tube surfaces and carried out shallow-layer pickling.After immersion completes, open flashboard, in shallow pond, acid solution flows in dark pond.
Remove the rapid-acting coupling above lateral jet pipe, access compressed-air actuated flexible pipe, open pressurized air main valve, pressurized air sprays from another group nozzle of side spray, by pipe surface and inner residual acid solution blowout.
Open exhaust blower, the air suction inlet of exhaust blower is placed in pickling region, and the air outlet of exhaust blower is placed in tap water through multiple nozzle, dissolves with tap water, and this tap water will be used as in the complex acid operation of pickling tub in the later stage.After acid pickling tube substantially dries up under compressed-air actuated effect, pickling tripod shifts out, and electric block hangs out acid pickling tube road, and is resetted by shallow for pickling pond cover plate, and the pickling end of job, enters downstream.
Embodiment 2
Pickling for prefabricated pipeline: in pipelining is produced, unit in charge of construction is the workload reducing site operation, general all according to the prefabricated a part of pipeline of drawing, pickling sealing is carried out before installation, site welding no longer can carry out pickling after installing, and this class channel bend is many, complex-shaped, the impurity and the rusty stain that accumulate pipe interior are difficult to remove, and the pipeline being simultaneously positioned over part in trough-type acid wash pool can be difficult to higher than the liquid level of pickle solution carry out pickling.And pipeline is reached the standard grade use after for some time; have corrosion, incrustation etc. in inner-walls of duct, need to carry out pickling operation to inner-walls of duct, ensure the degree of cleaning of pipeline; as adopted online pickling; often cause site environment to pollute, pipe protection carries out off-line pickling after removing; the problems referred to above can be avoided; but the same with prefabricated pipeline, pickling difficulty is large, pickling quality is difficult to ensure.
And adopt pickler of the present invention and method can carry out pickling operation to this kind of prefabricated pipeline.
Identically with embodiment 1 carry out greasy dirt inspection, the preparation work such as pre-treatment, cover plate are opened, first prefabricated pipeline is placed on waffle slab (bottom pickling tub), adopt Temporary connections line of communication, one end of Temporary connections connects acid filling collector, the other end adopts the flange welding matched with the existing flange of pipeline to become cycle pickling temporary pipeline, Temporary connections also can be inserted the endoporus treating pickling pipeline by the pipeline that less or internal diameter and Temporary connections external diameter are close for internal diameter, and is fixed installation with nylon rope, iron wire.
Open the cover plate in the shallow pond of pickling, first will treat on the grid platform of pickling tubing device for hoisting in the shallow pond of pickling, flashboard is inserted in the partition grooves in the middle of the shallow pond of pickling and dark pond, cut off the path in the shallow pond of pickling and dark pond.Open electric motor and triangle-frame is moved to position, pickling shallow pond, open acid proof pump, open side spray magnetic valve, acid solution is responsible for pickling through filter pump by dark pond under the effect of pump, through side spray acid pickling tube road direction pickling shallow pond acid filling, after liquid level reaches pickling tub setting height, stop acid proof pump.Treat that pickling tubing soaks 3-4 hour in acid solution, pickle solution is treated pickling tube surfaces and is carried out shallow-layer pickling.
After soak acid-cleaning, open the flashboard between the shallow pond of pickling and the dark pond of pickling, acid solution under gravity, flow to dark pond, and open acid proof pump, pickling side spray starts to be interrupted pickling, and pickling top spray is started working after pickling side spray.
Regulate the throttling valve of each pickling magnetic valve rear end, be adjusted to by opening maximum, open acid proof pump, now side spray, top spray, inner pickling is opened simultaneously, pickling 1-2 hour, and stop acid proof pump, acid solution under gravity, is all back to dark pond.
When the pickling of pipeline surfaces externally and internally all with reach setting require after, open the partition panel between shallow pond and dark pond, side spray works on, the impurity of pipe interior is made to go out pipeline, when the acid solution in shallow pond is lower than acid pickling tube, stop the work of acid proof pump, acid solution all flow to dark pond under gravity, remove the rapid-acting coupling above lateral jet pipe, access compressed-air actuated flexible pipe, open pressurized air main valve, pressurized air sprays from another group nozzle of side spray, by pipe surface and inner residual acid solution blowout.
In the shallow pond of now pickling, acid mist is comparatively large, and need open exhaust blower, the air suction inlet of exhaust blower is placed in pickling region, and the air outlet of exhaust blower is placed in tap water through multiple nozzle, dissolves with tap water, and this tap water will be used as in the complex acid operation of pickling tub in the later stage.After acid pickling tube substantially dries up under compressed-air actuated effect, pickling tripod shifts out, and electric block hangs out acid pickling tube road, and is resetted by shallow for pickling pond cover plate, and the pickling end of job, enters downstream.
Technique means disclosed in the present invention program is not limited only to the technique means disclosed in above-mentioned embodiment, also comprises the technical scheme be made up of above technical characteristic arbitrary combination.
Claims (10)
1. a trough-type acid wash pool circulating pickling device, it is characterized in that: comprise the shallow pond of pickling and the dark pond of pickling, shallow pond is arranged side by side with Shen Chi, length and width are identical, have at the bottom of pond, shallow pond at the bottom of gradient bottom surface, pond and be provided with waffle slab, flashboard is provided with between dark pond and shallow pond, the bottom in shallow pond, higher than the height of dark pond acid solution, is provided with cover plate above shallow pond and dark pond; Be provided with triangle-frame above the shallow pond of pickling and the dark pond of pickling, triangle-frame is provided with pickling collector, and triangle-frame is driven by electric motor and moves between pickling Shen Chi position and the shallow pond of pickling; Pickling collector to be responsible for acid proof pump by divider and to be connected; The one end in the shallow pond of pickling is provided with side spray plate, side spray plate is provided with side spray nozzle, and side spray nozzle is responsible for acid proof pump by side spray pickling pipeline and is connected; Acid solution passage and flashboard is provided with between the shallow pond of described pickling and the dark pond of pickling.
2. trough-type acid wash pool circulating pickling device according to claim 1, is characterized in that: be provided with filter screen between the dark pond of described pickling and the shallow pond of pickling.
3. trough-type acid wash pool circulating pickling device according to claim 1 and 2, is characterized in that: plane perpendicular direction is also provided with filter screen in described pickling dark pond.
4. trough-type acid wash pool circulating pickling device according to claim 1 and 2, is characterized in that: described triangle-frame is provided with the transparent plastics curtain be crisscross arranged.
5. trough-type acid wash pool circulating pickling device according to claim 1, is characterized in that: described flashboard is blind plate, top perforate flashboard or bottom perforate flashboard.
6. a trough-type acid wash pool cycle pickling method, uses the trough-type acid wash pool circulating pickling device in claim 1 ~ 5 described in any one to complete, it is characterized in that, comprise the steps:
(1) soak acid-cleaning will treat that pickling tubing device for hoisting is in the shallow pond of pickling, cut off the acid solution path in the shallow pond of pickling and dark pond, open acid proof pump, open side spray magnetic valve, acid solution is responsible for pickling through filter pump by dark pond under the effect of pump, through side spray acid pickling tube road direction pickling shallow pond acid filling, after liquid level reaches pickling tub setting height, acid proof pump quits work;
(2) pressurized air purges the rapid-acting coupling of removing above lateral jet pipe, access compressed-air actuated flexible pipe, open pressurized air main valve, pressurized air sprays from another group nozzle of side spray, by the residual acid solution blowout treating pickling tube surfaces and inside after step (1) process;
(3) acid mist in exhaust blower eliminating pickling tub is opened in air draft.
7. trough-type acid wash pool cycle pickling method according to claim 6, it is characterized in that, the step of being interrupted pickling is also comprised: after soak acid-cleaning between described step (1) and step (2), open the flashboard between the shallow pond of pickling and the dark pond of pickling, acid solution under gravity, flow to dark pond, open acid proof pump, pickling side spray carries out the pickling of interruption side spray according to the timed interval of presetting.
8. trough-type acid wash pool cycle pickling method according to claim 7, is characterized in that: also comprise the step to the pickling of pipe interior discontinuity acid filling in the step of described interruption pickling.
9. the trough-type acid wash pool cycle pickling method according to claim 7 or 8, is characterized in that: also comprise the step of being carried out being interrupted pickling by pickling top spray in the step of described interruption pickling.
10. the trough-type acid wash pool cycle pickling method according to claim 7 or 8, it is characterized in that, when pipeline inner rust erosion, greasy dirt heavier time, continuous pickling step is also comprised: the throttling valve regulating each pickling magnetic valve rear end after interruption acid pickling step, opening is adjusted to maximum, open acid proof pump, select at least one in side spray, top spray, inner pickling, continuous pickling.
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| CN105696009B (en) * | 2014-11-27 | 2017-12-29 | 宝钢工程技术集团有限公司 | The processing unit and its application method of acid washing liquid for stainless steel |
| CN105780035B (en) * | 2016-05-20 | 2019-03-01 | 双立恒通新材料科技（淮安）有限公司 | A kind of steel pipe degreasing system |
| CN105821432B (en) * | 2016-05-25 | 2018-03-23 | 江苏省冶金设计院有限公司 | A kind of tubing surfaces externally and internally acid washing method |
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| CN109338389B (en) * | 2018-12-27 | 2021-03-30 | 首钢水城钢铁(集团)赛德建设有限公司 | Groove type pipeline pickling device and method |
| CN109763132B (en) * | 2019-03-08 | 2023-12-22 | 上上德盛集团股份有限公司 | Vacuum acid liquor circulation pickling tank system |
| CN110318062A (en) * | 2019-07-29 | 2019-10-11 | 江苏贝斯特水处理科技有限公司 | A kind of energy conservation acid washing method and pickling system |
| CN113005465B (en) * | 2021-02-25 | 2022-09-09 | 上海金厦实业有限公司 | Acid pickling module for galvanizing line barrel plating process |
| CN114574873B (en) * | 2022-03-04 | 2022-11-25 | 江苏国源稀土新材料有限公司 | Neodymium iron boron waste recovery device and method for manufacturing praseodymium neodymium oxide |
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