CN104278285A - Descaling device and method for induction coil of vacuum furnace and intermediate frequency furnace - Google Patents
Descaling device and method for induction coil of vacuum furnace and intermediate frequency furnace Download PDFInfo
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- CN104278285A CN104278285A CN201410557697.2A CN201410557697A CN104278285A CN 104278285 A CN104278285 A CN 104278285A CN 201410557697 A CN201410557697 A CN 201410557697A CN 104278285 A CN104278285 A CN 104278285A
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Abstract
The invention relates to a descaling device and method for induction coils of a vacuum furnace and an intermediate frequency furnace. The descaling device comprises an induction coil water outlet connecting device and an induction coil water inlet connecting device, wherein the induction coil water outlet connecting device comprises a water outlet connecting pipe, a water outlet convertor, an overflow pipe, a wash water introducer and a compressed air introducer; and the induction coil water inlet connecting device comprises a water inlet connecting pipe, a water inlet convertor, a descaling agent introducer and a liquid discharge pipe. The invention also discloses a descaling method utilizing the descaling device for the induction coils of the vacuum furnace and the intermediate frequency furnace. The descaling device and the descaling method which are disclosed by the invention have good descaling effect and are capable of thoroughly removing the water scale which is generated on the induction coils of the vacuum furnace and the intermediate frequency furnace and difficult to remove.
Description
Technical field
The present invention relates to a kind of vacuum oven, intermediate frequency furnace ruhmkorff coil apparatus for eliminating sludge and method, belong to technical field of metallurgical equipment.
Background technology
At present, the small-sized smelting equipments such as domestic vacuum oven, intermediate frequency furnace, mostly adopt ruhmkorff coil type of heating to smelt, ruhmkorff coil operationally temperature is high, need cool with interior logical recirculated water.But because the working temperature of ruhmkorff coil is far above the working temperature of general hydrologic cycle cooling system, and under incrustation scale results from electromagnetic environment, thus cause the circulating water copper pipe inwall on ruhmkorff coil not only can produce a large amount of incrustation scale, and the incrustation scale formed is difficult to remove, thus cause ruhmkorff coil through-current capacity to reduce, cooling performance is poor, even can cause and wear stove accident time serious.
As Chinese patent literature CN102585878A (application number 201210060925.6) discloses a kind of On Line Foul Removing Technology method and apparatus of the atmospheric and vacuum distillation unit primary vacuum column tower top shell and tube heat exchanger for crude refining, its On Line Foul Removing Technology step is: the cooling circulating water turning off primary vacuum column shell and tube heat exchanger tube side, opens valve; Scale remover in excessive for receipts groove is squeezed in the tube side of shell and tube heat exchanger by impeller pump; Oil circuit enters the shell side of shell and tube heat exchanger by pipeline, with the scale remover heat exchange in shell and tube heat exchanger; Scale remover feed line strainer after shell and tube heat exchanger scale removal; Scale remover by the road after metre filter is back to receives the groove that overflows, and recycles.Its On Line Foul Removing Technology device comprises receives overflow groove, impeller pump, shell and tube heat exchanger, in-line filter.
Chinese patent literature CN202903002U (application number 201220599196.7) discloses a kind of apparatus for eliminating sludge of condenser, comprise condenser, scale removal pipeline and recycle pump, described recycle pump is connected in described scale removal pipeline, described scale removal pipeline is provided with scale remover filler, the inlet mouth of described scale removal pipeline and described condenser, air outlet, import and the outlet of coolant media communicate, at the inlet mouth of described scale removal pipeline and described condenser, air outlet, the import of coolant media and the junction of outlet are provided with valve, described recycle pump is also connected with one for intaking and the water receiving pipe of water outlet, described water receiving pipe is connected with water tank.
Above-mentioned patent documentation is mainly used in the scale removal of common cooling recirculation system, but not good for vacuum oven, intermediate frequency furnace ruhmkorff coil descale effect.
Chinese patent literature CN103114295A (application number 201310085207.9) discloses a kind of furnace induction coil fast cleaning device, it comprises cylindrical shell, also comprise impeller pump, described inner barrel is divided into two cavitys, wherein a cavity places the water of chemical substance, another cavity places clear water, and be connected with impeller pump respectively by pipeline in two cavitys of described cylindrical shell, described impeller pump is connected with the cleaning head coupling end for cleaning furnace induction coil by pipeline.
Although this device has certain effect to existing furnace induction coil scale removal, this apparatus structure is complicated, and early stage, implementation cost was higher.
Summary of the invention
The present invention is directed to the deficiencies in the prior art, a kind of vacuum oven, intermediate frequency furnace ruhmkorff coil apparatus for eliminating sludge and method are provided.
Technical program of the present invention lies in:
A kind of vacuum oven, intermediate frequency furnace ruhmkorff coil apparatus for eliminating sludge, comprising:
Ruhmkorff coil water outlet coupling device, comprise water outlet pipe connecting, water outlet transmodulator, upflow tube, wash-down water passes into device and pressurized gas passes into device, described water outlet transmodulator passes into device respectively and passes into device with pressurized gas and be connected with water outlet pipe connecting, upflow tube, wash-down water, make water outlet pipe connecting pass into device or pressurized gas respectively with upflow tube, wash-down water by water outlet transmodulator and pass into that device is airtight to be communicated with, water outlet pipe connecting is connected with ruhmkorff coil water outlet is airtight;
Ruhmkorff coil connecting device for water inlet, comprise water-in pipe connecting, water-in transmodulator, scale remover pass into device and liquid discharge pipe, described water-in transmodulator passes into device with water-in pipe connecting, scale remover respectively and is connected with liquid discharge pipe, make water-in pipe connecting pass into device with scale remover respectively by water-in transmodulator or liquid discharge pipe is connected, water-in pipe connecting is connected with ruhmkorff coil water-in is airtight.
Preferred according to the present invention, described wash-down water passes into device and comprises water pump, wash-down water storing unit and connecting tube.
Preferred according to the present invention, described pressurized gas passes into device and comprises air compressor and connecting tube.
Preferred according to the present invention, described scale remover passes into device and comprises corrosion resistant self-sucking pump, scale remover storing unit and connecting tube; Preferably, described corrosion resistant self-sucking pump is FS102#-2 corrosion resistant self-sucking pump.
Preferred according to the present invention, the outlet of described upflow tube and scale remover pass into the top that device is all positioned at ruhmkorff coil; Liquid discharge pipe is positioned at the below of ruhmkorff coil.
Utilize a descaling method for above-mentioned vacuum oven, intermediate frequency furnace ruhmkorff coil apparatus for eliminating sludge, step is as follows:
(1) the water outlet pipe connecting of ruhmkorff coil water outlet coupling device is connected with ruhmkorff coil water outlet is airtight, the water-in pipe connecting of ruhmkorff coil connecting device for water inlet is connected with ruhmkorff coil water-in is airtight; Adjust mouth of a river transmodulator, make pressurized gas pass into device and be communicated with water outlet pipe connecting is airtight, regulate water-in transmodulator, liquid discharge pipe is communicated with water-in pipe connecting is airtight, unlatching pressurized gas passes into the water coolant in device discharge ruhmkorff coil;
(2) mouth of a river transmodulator is adjusted, upflow tube is communicated with water outlet pipe connecting is airtight, regulate water-in transmodulator, make scale remover pass into device to be communicated with water-in pipe connecting is airtight, unlatching scale remover passes into device and is full of ruhmkorff coil to scale remover, close scale remover and pass into device, leave standstill 3 ~ 5 hours, then mouth of a river transmodulator is adjusted, make pressurized gas pass into device to be communicated with water outlet pipe connecting is airtight, regulate water-in transmodulator, liquid discharge pipe is communicated with water-in pipe connecting is airtight, unlatching pressurized gas passes into the scale remover in device discharge ruhmkorff coil;
(3) arranging the operating pressure that pressurized gas passes into the air compressor of device is 0.4 ~ 0.8MPa, carries out pressurized air purging, each 2 ~ 5min, purge 2 ~ 5 times ruhmkorff coil;
(4) adjust mouth of a river transmodulator, make wash-down water pass into device and be communicated with water outlet pipe connecting is airtight, regulate water-in transmodulator, liquid discharge pipe is communicated with water-in pipe connecting is airtight, open wash-down water and pass into device flushing 5 ~ 15min, reset.
Preferred according to the present invention, in described step (1), the air compressor operating pressure that pressurized gas passes into device is 0.3 ~ 0.5MPa.
Preferred according to the present invention, in described step (2), scale remover be employing copper pipe scale remover and water 1:(30 ~ 40 by volume) the solution that mixes of ratio, pH value 3 ~ 4; Preferably, described copper pipe scale remover is ZJ-821 copper pipe scale remover, pH value 2 ~ 2.5.
Preferred according to the present invention, in described step (3), the operating pressure that pressurized gas passes into the air compressor of device is 0.7MPa.
Beneficial effect
1, vacuum oven of the present invention, intermediate frequency furnace ruhmkorff coil apparatus for eliminating sludge are easy to use, can realize the Rapid Implementation to steps such as the dewatering of ruhmkorff coil, scale remover immersion, scale remover removing, high pressure gas purgings;
2, vacuum oven of the present invention, intermediate frequency furnace ruhmkorff coil descaling method are compared with existing descaling method, and scale remover consumption is few, and cost is low;
3, adopt method of the present invention and device, features high scale-removing effect, thoroughly can remove the incrustation scale being difficult to remove that vacuum oven, intermediate frequency furnace ruhmkorff coil produce.
Accompanying drawing explanation
Structural representation when Fig. 1 is vacuum oven described in embodiment 1, intermediate frequency furnace ruhmkorff coil apparatus for eliminating sludge uses;
Wherein: 1, ruhmkorff coil water outlet coupling device, 2, ruhmkorff coil connecting device for water inlet, 3, water outlet pipe connecting, 4, water outlet transmodulator, 5, upflow tube, 6, water pump, 7, wash-down water storing unit, 8, air compressor, 9, water-in pipe connecting, 10, water-in transmodulator, 11, corrosion resistant self-sucking pump, 12, scale remover storing unit, 13, liquid discharge pipe, 14, ruhmkorff coil.
Embodiment
Below in conjunction with embodiment and Figure of description, technical scheme of the present invention is described further, but institute of the present invention protection domain is not limited thereto.
Embodiment 1
A kind of vacuum oven as shown in Figure 1, intermediate frequency furnace ruhmkorff coil apparatus for eliminating sludge, comprising:
Ruhmkorff coil water outlet coupling device 1, comprise water outlet pipe connecting 3, water outlet transmodulator 4, upflow tube 5, wash-down water passes into device and pressurized gas passes into device, described water outlet transmodulator 4 passes into device respectively and passes into device with pressurized gas and be connected with water outlet pipe connecting 3, upflow tube 5, wash-down water, make water outlet pipe connecting 3 pass into device or pressurized gas respectively with upflow tube 5, wash-down water by water outlet transmodulator 4 and pass into that device is airtight to be communicated with, water outlet pipe connecting 3 is connected with ruhmkorff coil 14 water outlet is airtight;
Ruhmkorff coil connecting device for water inlet 2, comprise water-in pipe connecting 9, water-in transmodulator 10, scale remover pass into device and liquid discharge pipe 13, described water-in transmodulator 10 passes into device with water-in pipe connecting 9, scale remover respectively and is connected with liquid discharge pipe 13, make water-in pipe connecting 9 pass into device with scale remover respectively by water-in transmodulator 10 or liquid discharge pipe 13 is connected, water-in pipe connecting 9 is connected with ruhmkorff coil 14 water-in is airtight.
Described wash-down water passes into device and comprises water pump 6, wash-down water storing unit 7 and connecting tube.
Described pressurized gas passes into device and comprises air compressor 8 and connecting tube.
Described scale remover passes into device and comprises corrosion resistant self-sucking pump 11, scale remover storing unit 12 and connecting tube; Described corrosion resistant self-sucking pump 11 is FS102#-2 corrosion resistant self-sucking pump.
The outlet of described upflow tube 5 and scale remover pass into the top that device is all positioned at ruhmkorff coil 14; Liquid discharge pipe 13 is positioned at the below of ruhmkorff coil 14.
Embodiment 2
0.05t vacuum oven ruhmkorff coil is after use 2 year, and recirculated water operating pressure is 0.3MPa, and flow velocity 2m/s, DN40 copper pipe flow is reduced to 95L/min by 150.7L/min, and in ruhmkorff coil, the more current that cause of incrustation scale are not smooth.
Utilize the vacuum oven described in embodiment 1, intermediate frequency furnace ruhmkorff coil apparatus for eliminating sludge 0.05t vacuum oven ruhmkorff coil to be carried out to the method for scale removal, comprise step as follows:
(1) the water outlet pipe connecting of ruhmkorff coil water outlet coupling device is connected with 0.05t vacuum oven ruhmkorff coil water outlet is airtight, the water-in pipe connecting of ruhmkorff coil connecting device for water inlet is connected with 0.05t vacuum oven ruhmkorff coil water-in is airtight; Adjust mouth of a river transmodulator, make pressurized gas pass into device to be communicated with water outlet pipe connecting is airtight, regulate water-in transmodulator, liquid discharge pipe is communicated with water-in pipe connecting is airtight, open pressurized gas and pass into device adjusting work pressure to 0.4MPa, discharge the water coolant in ruhmkorff coil;
(2) mouth of a river transmodulator is adjusted, upflow tube is communicated with water outlet pipe connecting is airtight, regulate water-in transmodulator, make scale remover pass into device to be communicated with water-in pipe connecting is airtight, unlatching scale remover passes into device and is full of ruhmkorff coil to scale remover, close scale remover and pass into device, leave standstill 4 hours, then mouth of a river transmodulator is adjusted, make pressurized gas pass into device to be communicated with water outlet pipe connecting is airtight, regulate water-in transmodulator, liquid discharge pipe is communicated with water-in pipe connecting is airtight, unlatching pressurized gas passes into the scale remover in device discharge ruhmkorff coil;
(3) arranging the operating pressure that pressurized gas passes into the air compressor of device is 0.4MPa, carries out pressurized air purging, each 3min, purge 3 times 0.05t vacuum oven ruhmkorff coil;
(4) adjust mouth of a river transmodulator, make wash-down water pass into device and be communicated with water outlet pipe connecting is airtight, regulate water-in transmodulator, liquid discharge pipe is communicated with water-in pipe connecting is airtight, and after unlatching wash-down water passes into device flushing 10min, muddy water is discharged completely, through-flow quantitative change is large, resets.
In described step (2), scale remover is the solution adopting the ratio of copper pipe scale remover and water 1:30 by volume to mix, pH value 3; Described copper pipe scale remover is ZJ-821 copper pipe scale remover, pH value 2.
After testing, be 130L/min by the ruhmkorff coil circulating water flow after aforesaid method scale removal, descaling rate is 86 ﹪.
Embodiment 3
0.05t vacuum oven ruhmkorff coil is after use 3 year, and recirculated water operating pressure is 0.3MPa, and flow velocity 2m/s, DN40 copper pipe flow is reduced to 83L/min by 150.7L/min, and in ruhmkorff coil, the more current that cause of incrustation scale are not smooth.
Utilize the vacuum oven described in embodiment 1, intermediate frequency furnace ruhmkorff coil apparatus for eliminating sludge 0.05t vacuum oven ruhmkorff coil to be carried out to the method for scale removal, comprise step as follows:
(1) the water outlet pipe connecting of ruhmkorff coil water outlet coupling device is connected with 0.05t vacuum oven ruhmkorff coil water outlet is airtight, the water-in pipe connecting of ruhmkorff coil connecting device for water inlet is connected with 0.05t vacuum oven ruhmkorff coil water-in is airtight; Adjust mouth of a river transmodulator, make pressurized gas pass into device to be communicated with water outlet pipe connecting is airtight, regulate water-in transmodulator, liquid discharge pipe is communicated with water-in pipe connecting is airtight, open pressurized gas and pass into the operating pressure of the air compressor that device regulates to 0.4MPa, discharge the water coolant in ruhmkorff coil;
(2) mouth of a river transmodulator is adjusted, upflow tube is communicated with water outlet pipe connecting is airtight, regulate water-in transmodulator, make scale remover pass into device to be communicated with water-in pipe connecting is airtight, unlatching scale remover passes into device and is full of ruhmkorff coil to scale remover, close scale remover and pass into device, leave standstill 3 hours, then mouth of a river transmodulator is adjusted, make pressurized gas pass into device to be communicated with water outlet pipe connecting is airtight, regulate water-in transmodulator, liquid discharge pipe is communicated with water-in pipe connecting is airtight, unlatching pressurized gas passes into the scale remover in device discharge ruhmkorff coil;
(3) arranging the operating pressure that pressurized gas passes into the air compressor of device is 0.7MPa, carries out pressurized air purging, each 5min, purge 5 times 0.05t vacuum oven ruhmkorff coil;
(4) adjust mouth of a river transmodulator, make wash-down water pass into device and be communicated with water outlet pipe connecting is airtight, regulate water-in transmodulator, liquid discharge pipe is communicated with water-in pipe connecting is airtight, and after unlatching wash-down water passes into device flushing 15min, muddy water is discharged completely, through-flow quantitative change is large, resets.
In described step (2), scale remover is the solution adopting the ratio of copper pipe scale remover and water 1:40 by volume to mix, pH value 4; Described copper pipe scale remover is ZJ-821 copper pipe scale remover, pH value 2.5.
After testing, be 143L/min by the ruhmkorff coil circulating water flow after aforesaid method scale removal, descaling rate is 95 ﹪, and descale effect is remarkable.
Embodiment 4
The ruhmkorff coil of 1.5t intermediate frequency furnace divides feels coil, lower sense coil, bottom coil three part (bottom coil no power, water flowing cooling), ruhmkorff coil is after use 3 year, upper sense coil circular water operating pressure is 0.3MPa, flow velocity 2m/s, DN40 copper pipe flow is reduced to 105L/min by 150.7L/min, and in upper ruhmkorff coil, the more current that cause of incrustation scale are not smooth.
Utilize the vacuum oven described in embodiment 1, method that the upper ruhmkorff coil of intermediate frequency furnace ruhmkorff coil apparatus for eliminating sludge to 1.5t intermediate frequency furnace carries out scale removal, comprise step as follows:
(1) the water outlet pipe connecting of upper ruhmkorff coil water outlet coupling device is connected with 1.5t intermediate frequency furnace ruhmkorff coil water outlet is airtight, the water-in pipe connecting of ruhmkorff coil connecting device for water inlet is connected with 1.5t intermediate frequency furnace ruhmkorff coil water-in is airtight; Adjust mouth of a river transmodulator, make pressurized gas pass into device to be communicated with water outlet pipe connecting is airtight, regulate water-in transmodulator, liquid discharge pipe is communicated with water-in pipe connecting is airtight, open pressurized gas and pass into device adjusting work pressure to 0.4MPa, discharge the water coolant in the upper ruhmkorff coil of 1.5t intermediate frequency furnace;
(2) mouth of a river transmodulator is adjusted, upflow tube is communicated with water outlet pipe connecting is airtight, regulate water-in transmodulator, make scale remover pass into device to be communicated with water-in pipe connecting is airtight, unlatching scale remover passes into device and is full of ruhmkorff coil to scale remover, close scale remover and pass into device, leave standstill 5 hours, then mouth of a river transmodulator is adjusted, make pressurized gas pass into device to be communicated with water outlet pipe connecting is airtight, regulate water-in transmodulator, liquid discharge pipe is communicated with water-in pipe connecting is airtight, unlatching pressurized gas passes into the scale remover in device discharge ruhmkorff coil;
(3) arranging the air compressor operating pressure that pressurized gas passes into device is 0.4MPa, carries out pressurized air purging, each 2min, purge 2 times the upper ruhmkorff coil of 1.5t intermediate frequency furnace;
(4) adjust mouth of a river transmodulator, make wash-down water pass into device and be communicated with water outlet pipe connecting is airtight, regulate water-in transmodulator, liquid discharge pipe is communicated with water-in pipe connecting is airtight, and after unlatching wash-down water passes into device flushing 5min, muddy water is discharged completely, through-flow quantitative change is large, resets.
In described step (2), scale remover is the solution adopting the ratio of copper pipe scale remover and water 1:35 by volume to mix, pH value 3.5; Described copper pipe scale remover is ZJ-821 copper pipe scale remover, pH value 2.5.
After testing, be 135L/min by the upper ruhmkorff coil circulating water flow of the 1.5t intermediate frequency furnace after aforesaid method scale removal, descaling rate is 89 ﹪.
Embodiment 5
The ruhmkorff coil of 1.5t intermediate frequency furnace divides feels coil, lower sense coil, bottom coil three part (bottom coil no power, water flowing cooling), ruhmkorff coil is after use 3 year, lower sense coil circular water operating pressure is 0.3MPa, flow velocity 2m/s, DN40 copper pipe flow is reduced to 105L/min by 150.7L/min, and in lower ruhmkorff coil, the more current that cause of incrustation scale are not smooth.
Utilize the vacuum oven described in embodiment 1, intermediate frequency furnace ruhmkorff coil apparatus for eliminating sludge carry out the method for scale removal to ruhmkorff coil under 1.5t intermediate frequency furnace, comprise step as follows:
(1) the water outlet pipe connecting of ruhmkorff coil water outlet coupling device is connected with ruhmkorff coil water outlet is airtight under 1.5t intermediate frequency furnace, the water-in pipe connecting of ruhmkorff coil connecting device for water inlet is connected with ruhmkorff coil water-in is airtight under 1.5t intermediate frequency furnace; Adjust mouth of a river transmodulator, make pressurized gas pass into device and be communicated with water outlet pipe connecting is airtight, regulate water-in transmodulator, liquid discharge pipe is communicated with water-in pipe connecting is airtight, open pressurized gas and pass into device to normal pressure, discharge the water coolant in ruhmkorff coil;
(2) mouth of a river transmodulator is adjusted, upflow tube is communicated with water outlet pipe connecting is airtight, regulate water-in transmodulator, make scale remover pass into device to be communicated with water-in pipe connecting is airtight, unlatching scale remover passes into device and is full of ruhmkorff coil to scale remover, close scale remover and pass into device, leave standstill 4 hours, then mouth of a river transmodulator is adjusted, make pressurized gas pass into device to be communicated with water outlet pipe connecting is airtight, regulate water-in transmodulator, liquid discharge pipe is communicated with water-in pipe connecting is airtight, unlatching pressurized gas passes into the scale remover in device discharge ruhmkorff coil;
(3) arranging the operating pressure that pressurized gas passes into the air compressor of device is 0.7MPa, carries out pressurized air purging, each 3min, purge 3 times ruhmkorff coil under 1.5t intermediate frequency furnace;
(4) adjust mouth of a river transmodulator, make wash-down water pass into device and be communicated with water outlet pipe connecting is airtight, regulate water-in transmodulator, liquid discharge pipe is communicated with water-in pipe connecting is airtight, and after unlatching wash-down water passes into device flushing 10min, muddy water is discharged completely, through-flow quantitative change is large, resets.
In described step (2), scale remover is the solution adopting the ratio of copper pipe scale remover and water 1:30 by volume to mix, pH value 3; Described copper pipe scale remover is ZJ-821 copper pipe scale remover, pH value 2.
After testing, be 143L/min by the ruhmkorff coil circulating water flow after aforesaid method scale removal, descaling rate is 95 ﹪, and descale effect is remarkable.
Comparative example 1
0.05t vacuum oven ruhmkorff coil is after use 3 year, and it is not smooth that circulating water flow is reduced to the more current that cause of incrustation scale in 83L/min ruhmkorff coil by 150.7L/min.
Utilize the vacuum oven described in embodiment 1, intermediate frequency furnace ruhmkorff coil apparatus for eliminating sludge 0.05t vacuum oven ruhmkorff coil to be carried out to the method for scale removal, comprise step as follows:
I the water outlet pipe connecting of ruhmkorff coil water outlet coupling device is connected with 0.05t vacuum oven ruhmkorff coil water outlet is airtight by (), be connected by the water-in pipe connecting of ruhmkorff coil connecting device for water inlet with 0.05t vacuum oven ruhmkorff coil water-in is airtight; Adjust mouth of a river transmodulator, make pressurized gas pass into device to be communicated with water outlet pipe connecting is airtight, regulate water-in transmodulator, liquid discharge pipe is communicated with water-in pipe connecting is airtight, open pressurized gas and pass into device adjusting work pressure to 0.4MPa, discharge the water coolant in ruhmkorff coil;
(ii) mouth of a river transmodulator is adjusted, upflow tube is communicated with water outlet pipe connecting is airtight, regulate water-in transmodulator, make scale remover pass into device to be communicated with water-in pipe connecting is airtight, unlatching scale remover passes into device and is full of ruhmkorff coil to scale remover, close scale remover and pass into device, leave standstill 4 hours, then mouth of a river transmodulator is adjusted, make pressurized gas pass into device to be communicated with water outlet pipe connecting is airtight, regulate water-in transmodulator, liquid discharge pipe is communicated with water-in pipe connecting is airtight, unlatching pressurized gas passes into the scale remover in device discharge ruhmkorff coil;
(iii) adjust mouth of a river transmodulator, make wash-down water pass into device and be communicated with water outlet pipe connecting is airtight, regulate water-in transmodulator, liquid discharge pipe is communicated with water-in pipe connecting is airtight, and after unlatching wash-down water passes into device flushing 10min, muddy water is discharged completely, through-flow quantitative change is large, resets.
In described step (2), scale remover is the solution adopting the ratio of copper pipe scale remover and water 1:30 by volume to mix, pH value 3; Described copper pipe scale remover is ZJ-821 copper pipe scale remover, pH value 2.
After testing, be 95L/min by the ruhmkorff coil circulating water flow after aforesaid method scale removal, descaling rate is 25 ﹪.
Comparative example 2
Adopt ruhmkorff coil ruhmkorff coil under the 1.5t intermediate frequency furnace identical with embodiment 5, after use 3 time, circulating water flow is reduced to 105L/min by 150.7L/min, and in ruhmkorff coil, the more current that cause of incrustation scale are not smooth.
The device that in Chinese patent literature CN202903002U (application number 201220599196.7), embodiment is recorded is used to carry out circulation scale removal according to the method in its specification sheets.Scale remover is the solution adopting the ratio of copper pipe scale remover and water 1:30 by volume to mix, pH value 3; Described copper pipe scale remover is ZJ-821 copper pipe scale remover, pH value 2.
After testing, be 113L/min by the ruhmkorff coil circulating water flow after aforesaid method scale removal, descaling rate is 34 ﹪.
Interpretation of result
As can be seen from the Data Comparison above by embodiment 2 and embodiment 3 and embodiment 4 and embodiment 5, in drainage procedure, the change that pressurized gas passes into the air compressor working pressure of device is set and can affects last descale effect, may be because the incrustation scale formation condition temperature in ruhmkorff coil is high, and under electromagnetic environment, thus cause incrustation scale density higher, pressure change in drainage procedure causes incrustation scale surface to occur crackle, be beneficial to the infiltration of follow-up scale remover, thus improve descaling rate.
As can be seen from the Data Comparison of embodiment 2-5 and comparative example 1, purge step can significantly improve descale effect, major cause may be because the incrustation scale formation condition temperature in ruhmkorff coil is high, and under electromagnetic environment, thus cause incrustation scale density higher, not easily remove, purge step can be broken by the incrustation scale after being softened by scale remover, thus reply and improve descaling rate.
As can be seen from the Data Comparison of embodiment 2-5 and comparative example 2, the descaling method descale effect of prior art is not good.Major cause may be because the incrustation scale formation condition temperature in ruhmkorff coil is high, and under electromagnetic environment, thus cause incrustation scale density higher, not easily remove, and the scale remover circulation scale removal of prior art, fine and close incrustation scale top layer cannot be abolished, thus cause descale effect not good.
Claims (9)
1. vacuum oven, an intermediate frequency furnace ruhmkorff coil apparatus for eliminating sludge, is characterized in that, comprising:
Ruhmkorff coil water outlet coupling device, comprise water outlet pipe connecting, water outlet transmodulator, upflow tube, wash-down water passes into device and pressurized gas passes into device, described water outlet transmodulator passes into device respectively and passes into device with pressurized gas and be connected with water outlet pipe connecting, upflow tube, wash-down water, make water outlet pipe connecting pass into device or pressurized gas respectively with upflow tube, wash-down water by water outlet transmodulator and pass into that device is airtight to be communicated with, water outlet pipe connecting is connected with ruhmkorff coil water outlet is airtight;
Ruhmkorff coil connecting device for water inlet, comprise water-in pipe connecting, water-in transmodulator, scale remover pass into device and liquid discharge pipe, described water-in transmodulator passes into device with water-in pipe connecting, scale remover respectively and is connected with liquid discharge pipe, make water-in pipe connecting pass into device with scale remover respectively by water-in transmodulator or liquid discharge pipe is connected, water-in pipe connecting is connected with ruhmkorff coil water-in is airtight.
2. vacuum oven, intermediate frequency furnace ruhmkorff coil apparatus for eliminating sludge as claimed in claim 1, it is characterized in that, described wash-down water passes into device and comprises water pump, wash-down water storing unit and connecting tube.
3. vacuum oven, intermediate frequency furnace ruhmkorff coil apparatus for eliminating sludge as claimed in claim 1, it is characterized in that, described pressurized gas passes into device and comprises air compressor and connecting tube.
4. vacuum oven, intermediate frequency furnace ruhmkorff coil apparatus for eliminating sludge as claimed in claim 1, it is characterized in that, described scale remover passes into device and comprises corrosion resistant self-sucking pump, scale remover storing unit and connecting tube; Preferably, described corrosion resistant self-sucking pump is FS102#-2 corrosion resistant self-sucking pump.
5. vacuum oven, intermediate frequency furnace ruhmkorff coil apparatus for eliminating sludge as claimed in claim 1, it is characterized in that, the outlet of described upflow tube and scale remover pass into the top that device is all positioned at ruhmkorff coil; Liquid discharge pipe is positioned at the below of ruhmkorff coil.
6. utilize a descaling method for vacuum oven described in claim 1, intermediate frequency furnace ruhmkorff coil apparatus for eliminating sludge, it is characterized in that, step is as follows:
(1) the water outlet pipe connecting of ruhmkorff coil water outlet coupling device is connected with ruhmkorff coil water outlet is airtight, the water-in pipe connecting of ruhmkorff coil connecting device for water inlet is connected with ruhmkorff coil water-in is airtight; Adjust mouth of a river transmodulator, make pressurized gas pass into device and be communicated with water outlet pipe connecting is airtight, regulate water-in transmodulator, liquid discharge pipe is communicated with water-in pipe connecting is airtight, unlatching pressurized gas passes into the water coolant in device discharge ruhmkorff coil;
(2) mouth of a river transmodulator is adjusted, upflow tube is communicated with water outlet pipe connecting is airtight, regulate water-in transmodulator, make scale remover pass into device to be communicated with water-in pipe connecting is airtight, unlatching scale remover passes into device and is full of ruhmkorff coil to scale remover, close scale remover and pass into device, leave standstill 3 ~ 5 hours, then mouth of a river transmodulator is adjusted, make pressurized gas pass into device to be communicated with water outlet pipe connecting is airtight, regulate water-in transmodulator, liquid discharge pipe is communicated with water-in pipe connecting is airtight, unlatching pressurized gas passes into the scale remover in device discharge ruhmkorff coil;
(3) arranging the air compressor operating pressure that pressurized gas passes into device is 0.4 ~ 0.8MPa, carries out pressurized air purging, each 2 ~ 5min, purge 2 ~ 5 times ruhmkorff coil;
(4) adjust mouth of a river transmodulator, make wash-down water pass into device and be communicated with water outlet pipe connecting is airtight, regulate water-in transmodulator, liquid discharge pipe is communicated with water-in pipe connecting is airtight, open wash-down water and pass into device flushing 5 ~ 15min, reset.
7. descaling method as claimed in claim 6, it is characterized in that, in described step (1), the air compressor operating pressure that pressurized gas passes into device is 0.3 ~ 0.5MPa.
8. descaling method as claimed in claim 6, is characterized in that, in described step (2), scale remover be employing copper pipe scale remover and water 1:(30 ~ 40 by volume) the solution that mixes of ratio, pH value 3 ~ 4; Preferably, described copper pipe scale remover is ZJ-821 copper pipe scale remover, pH value 2 ~ 2.5.
9. descaling method as claimed in claim 6, it is characterized in that, in described step (3), the air compressor operating pressure that pressurized gas passes into device is 0.7MPa.
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| CN201410557697.2A CN104278285B (en) | 2014-10-20 | 2014-10-20 | Descaling device and method for induction coil of vacuum furnace and intermediate frequency furnace |
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| CN201410557697.2A CN104278285B (en) | 2014-10-20 | 2014-10-20 | Descaling device and method for induction coil of vacuum furnace and intermediate frequency furnace |
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| CN104278285B CN104278285B (en) | 2017-03-22 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111486136A (en) * | 2019-12-21 | 2020-08-04 | 合肥皖化电泵有限公司 | Resistance reducing method for inner wall of furnace water pump |
| CN111790519A (en) * | 2020-07-20 | 2020-10-20 | 攀钢集团矿业有限公司 | Online cleaning method for excitation coil of high-gradient magnetic separator |
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| CN102585878A (en) * | 2012-03-09 | 2012-07-18 | 南京化工职业技术学院 | On-line descaling method and device used for tube type heat exchanger on top of shallow decompression tower of crude oil refining atmospheric and vacuum distillation unit |
| CN202903002U (en) * | 2012-11-14 | 2013-04-24 | 郎溪县鑫泽涂料有限公司 | Scale removal device for condenser |
| CN103114295A (en) * | 2013-03-18 | 2013-05-22 | 五力机电科技（昆山）有限公司 | Quick cleaning device for furnace body induction coil |
| CN204198862U (en) * | 2014-10-20 | 2015-03-11 | 山东钢铁股份有限公司 | A kind of vacuum oven, intermediate frequency furnace ruhmkorff coil apparatus for eliminating sludge |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102585878A (en) * | 2012-03-09 | 2012-07-18 | 南京化工职业技术学院 | On-line descaling method and device used for tube type heat exchanger on top of shallow decompression tower of crude oil refining atmospheric and vacuum distillation unit |
| CN202903002U (en) * | 2012-11-14 | 2013-04-24 | 郎溪县鑫泽涂料有限公司 | Scale removal device for condenser |
| CN103114295A (en) * | 2013-03-18 | 2013-05-22 | 五力机电科技（昆山）有限公司 | Quick cleaning device for furnace body induction coil |
| CN204198862U (en) * | 2014-10-20 | 2015-03-11 | 山东钢铁股份有限公司 | A kind of vacuum oven, intermediate frequency furnace ruhmkorff coil apparatus for eliminating sludge |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111486136A (en) * | 2019-12-21 | 2020-08-04 | 合肥皖化电泵有限公司 | Resistance reducing method for inner wall of furnace water pump |
| CN111790519A (en) * | 2020-07-20 | 2020-10-20 | 攀钢集团矿业有限公司 | Online cleaning method for excitation coil of high-gradient magnetic separator |
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| CN104278285B (en) | 2017-03-22 |
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