CN103128083B - Cleaning method of titanium storage tank - Google Patents
Cleaning method of titanium storage tank Download PDFInfo
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- CN103128083B CN103128083B CN201210540791.8A CN201210540791A CN103128083B CN 103128083 B CN103128083 B CN 103128083B CN 201210540791 A CN201210540791 A CN 201210540791A CN 103128083 B CN103128083 B CN 103128083B
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- 238000000034 method Methods 0.000 title claims abstract description 44
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 title claims abstract description 24
- 229910052719 titanium Inorganic materials 0.000 title claims abstract description 24
- 239000010936 titanium Substances 0.000 title claims abstract description 24
- 238000004140 cleaning Methods 0.000 title abstract 5
- 238000007789 sealing Methods 0.000 claims abstract description 7
- 230000010363 phase shift Effects 0.000 claims description 16
- 238000005070 sampling Methods 0.000 claims description 16
- 230000008859 change Effects 0.000 claims description 7
- 230000006378 damage Effects 0.000 claims description 6
- 239000000725 suspension Substances 0.000 claims description 6
- 238000004062 sedimentation Methods 0.000 claims description 3
- 238000004064 recycling Methods 0.000 abstract description 3
- 230000008569 process Effects 0.000 abstract description 2
- 239000003990 capacitor Substances 0.000 description 11
- 230000001052 transient effect Effects 0.000 description 6
- 238000005516 engineering process Methods 0.000 description 4
- 238000013459 approach Methods 0.000 description 2
- 238000011217 control strategy Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- 208000027418 Wounds and injury Diseases 0.000 description 1
- 230000002457 bidirectional effect Effects 0.000 description 1
- 238000004422 calculation algorithm Methods 0.000 description 1
- 239000000969 carrier Substances 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000002592 echocardiography Methods 0.000 description 1
- 238000005868 electrolysis reaction Methods 0.000 description 1
- 208000014674 injury Diseases 0.000 description 1
- 238000011835 investigation Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 238000001208 nuclear magnetic resonance pulse sequence Methods 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 238000013139 quantization Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- XJDNKRIXUMDJCW-UHFFFAOYSA-J titanium tetrachloride Chemical compound Cl[Ti](Cl)(Cl)Cl XJDNKRIXUMDJCW-UHFFFAOYSA-J 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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Abstract
The invention relates to a cleaning method of a titanium storage tank. The cleaning method comprises step one: under a sealing state, utilizing a feeding pump to wash sedimentary mud in the titanium storage tank and enable the mud to be suspended; and step two: throwing suspended mud into a thick machine to conduct cleaning; and repeating the step one and the step two until the mud does not exist in the titanium storage tank. A sealing method is adopted by the cleaning method, the mud is transferred to a recycling system which can process the mud, pollution is avoided, and recycling rate is improved.
Description
Technical field
The present invention relates to a kind of clean method of titanium storage tank.
Background technology
At present, domestic electrolysis enterprise is for the not good treating method of the mud of titanium storage tank, generally beat away with cleaner crude titanic chloride, then open manhole, manually stand in outside and wear a mask over one's face, wear protective garment, dial outward with rake, be contained in container or sell or water washes away, there are a lot of problems in these methods, very large to the injury of human body.
Summary of the invention
The technical problem to be solved in the present invention is to provide one and is suitable for sealing transfer mud, and the clean method of the convenient titanium storage tank of recycling.
In order to solve the problems of the technologies described above, the invention provides a kind of clean method of titanium storage tank, comprising:
1. under sealing state, utilize feeding engine to wash away the mud of sedimentation in described titanium storage tank, make its suspension;
2. then the mud of suspension is squeezed into concentrator, clarify;
Repeating step 1., 2., until described titanium storage tank is without mud.
Further, connect one at the three-phase power input end of described titanium storage tank and be suitable for correcting the chain type SVG device of power factor.
Described chain type SVG device comprises:
The multi-electrical level inverter of H electric bridge multi-type, it is made up of the three-phase H bridge power model that is connected in described three phase mains, wherein, sets up at least one H electric bridge element circuit for subsequent use in every phase H bridge power model; The H bridge element circuit that this multi-electrical level inverter energy auto by pass breaks down, to ensure that H electric bridge multi-type multi-electrical level inverter normally works, makes described chain type SVG device continue to reach the object of correcting power factor.
Auto by pass circuit, is located at the output of each H electric bridge element circuit, and in the time that a H electric bridge element circuit is damaged, by this H electric bridge element circuit bypass;
Sample circuit, is suitable for the instantaneous value of the voltage and current that gathers described three phase mains;
Divide phase current independent controling circuit, it is connected with described sample circuit, is suitable for calculating according to the instantaneous value of the voltage and current of described three phase mains modulation ratio M and the phase angle δ of the required sinusoidal modulation wave of described pulse-width modulation circuit;
Pulse-width modulation circuit, is connected with described point of phase current independent controling circuit, for the carrier wave triangular wave phase shift SPWM adopting between each H electric bridge element circuit being controlled according to the modulation ratio M of described sinusoidal modulation wave and phase angle δ; ; when after the H electric bridge element circuit bypass damaging; this pulse-width modulation circuit is suitable for keeping on constant basis of sampling period of described sample circuit; change the carrier frequency of the described carrier wave triangular wave phase shift SPWM of a phase H bridge power model at the H electric bridge element circuit place of this damage, to obtain the impulse modulation waveform of the carrier wave triangular wave phase shift SPWM corresponding with remaining H electric bridge element circuit quantity in this phase H bridge power model.
Further, described point of phase current independent controling circuit, comprising:
Phaselocked loop, according to the instantaneous value of the voltage of described three phase mains to follow the tracks of the voltage-phase of described three phase mains;
The given module of reactive current, the voltage-phase that is suitable for drawing according to described phaselocked loop calculates the cosine amount of this voltage-phase and multiplies each other with a reactive current reference value, to obtain actual reactive current output;
The given module of watt current, the voltage-phase that is suitable for drawing according to described phaselocked loop calculates the sinusoidal quantity of this voltage-phase, subtract each other according to the voltage reference value of the average voltage of the DC bus capacitor of described each phase H bridge power model and a DC bus capacitor simultaneously and multiply each other with described sinusoidal quantity again after PI controls, to obtain actual watt current output;
Transient current tracking module, for first the electric current of given described reactive current module and the given module output of watt current being superposeed, then deduct the transient current in described three phase mains, and by controller to calculate modulation ratio M and the phase angle δ of the required sinusoidal modulation wave of described pulse-width modulation circuit.
Compared with prior art, the clean method tool of titanium storage tank of the present invention has the following advantages: (1) adopts the method for sealing, and mud is transferred in the recovery system that can process mud, has avoided pollution, has improved recovery utilization rate; (2) utilize described chain type SVG device, correct the problem that causes the power factor of electrical network to decline due to the work of titanium storage tank, improved the utilization rate of transformer; (3) in described chain type SVG device, be provided with H bridge element circuit for subsequent use, can a H bridge element circuit breaks down again time, the H bridge element circuit auto by pass of this fault, and ensure that H electric bridge multi-type multi-electrical level inverter normally works,, correct power factor of electric network; (4) and in the time that this H bridge power model is damaged, without shutting down maintenance, ensured the stable of electrical network; (5) pulse-width modulation circuit regulates the modulating wave of the phase H bridge power model being damaged, and has effectively avoided harmonic wave generation; (6) independently control by point phase current the compensation problem that has realized the uneven output of three phase mains.
Brief description of the drawings
For content of the present invention is more likely to be clearly understood, below the specific embodiment by reference to the accompanying drawings of basis, the present invention is further detailed explanation, wherein
Fig. 1 titanium storage tank of the present invention connects the structural representation of three phase mains and chain type SVG device;
The circuit structure diagram of the multi-electrical level inverter of Fig. 2 H electric bridge of the present invention multi-type;
The structured flowchart of of the present invention point of phase current independent controling circuit of Fig. 3;
The oscillogram of the stacked SPWM modulation of Fig. 4 carrier wave triangular wave of the present invention homophase individual layer;
Pulse generate sequential before Fig. 5 generation of the present invention H electric bridge unit module breaks down;
Pulse generate sequential after Fig. 6 the first fault of the present invention H electric bridge unit module is bypassed;
Pulse generate sequential after Fig. 7 the second fault of the present invention H electric bridge unit module is bypassed.
Detailed description of the invention
Below in conjunction with drawings and Examples, the present invention is described in detail:
A clean method for titanium storage tank, comprising:
1. under sealing state, utilize feeding engine to wash away the mud of sedimentation in described titanium storage tank, make its suspension;
2. then the mud of suspension is squeezed into concentrator, clarify, can effectively reclaim clarified solution;
Repeating step 1., 2., until described titanium storage tank is without mud.
Connect one at the three-phase power input end of described titanium storage tank and be suitable for correcting the chain type SVG device of power factor.
As shown in Figure 1-2, described chain type SVG device comprises:
The multi-electrical level inverter of H electric bridge multi-type, it is made up of the three-phase H bridge power model that is connected in described three phase mains, wherein, sets up at least one H electric bridge element circuit for subsequent use in every phase H bridge power model;
Auto by pass circuit, is located at the output of each H electric bridge element circuit, and in the time that a H electric bridge element circuit is damaged, by this H electric bridge element circuit bypass; Sample circuit, is suitable for the instantaneous value of the voltage and current that gathers described three phase mains, and this instantaneous value comprises amplitude, the cycle of voltage and current;
Divide phase current independent controling circuit, it is connected with described sample circuit, is suitable for calculating according to the instantaneous value of the voltage and current of described three phase mains modulation ratio M and the phase angle δ of the required sinusoidal modulation wave of described pulse-width modulation circuit;
Pulse-width modulation circuit, is connected with described point of phase current independent controling circuit, for the carrier wave triangular wave phase shift SPWM adopting between each H electric bridge element circuit being controlled according to the modulation ratio M of described sinusoidal modulation wave and phase angle δ; ; when after the H electric bridge element circuit bypass damaging; this pulse-width modulation circuit is suitable for keeping on constant basis of sampling period of described sample circuit; change the carrier frequency of the described carrier wave triangular wave phase shift SPWM of a phase H bridge power model at the H electric bridge element circuit place of this damage, to obtain the impulse modulation waveform of the carrier wave triangular wave phase shift SPWM corresponding with remaining H electric bridge element circuit quantity in this phase H bridge power model.
See Fig. 3, described point of phase current independent controling circuit, comprising:
Phaselocked loop, according to the instantaneous value of the voltage of described three phase mains to follow the tracks of the voltage-phase of described three phase mains;
The given module of reactive current, the voltage-phase that is suitable for drawing according to described phaselocked loop calculates the cosine amount of this voltage-phase and multiplies each other with a reactive current reference value, to obtain actual reactive current output;
The given module of watt current, the voltage-phase that is suitable for drawing according to described phaselocked loop calculates the sinusoidal quantity of this voltage-phase, subtract each other according to the voltage reference value of the average voltage of the DC bus capacitor of described each phase H bridge power model and a DC bus capacitor simultaneously and multiply each other with described sinusoidal quantity again after PI controls, to obtain actual watt current output;
Transient current tracking module, for first the electric current of given described reactive current module and the given module output of watt current being superposeed, then deduct the transient current in described three phase mains, and by controller to calculate modulation ratio M and the phase angle δ of the required sinusoidal modulation wave of described pulse-width modulation circuit.
Wherein reference current is the offset current of expecting, DC voltage reference value is the bucking voltage of expecting.
Described pulse-width modulation circuit relates to SPWM pulsewidth modulation method, this SPWM pulsewidth modulation method is to do modulating wave with a sine wave, doubly do that carrier wave carries out waveform relatively and the one group of amplitude producing equates to the triangular wave of sinusoidal modulation wave frequency with F, width is proportional to the rectangular pulse train of sinusoidal modulation wave and carrys out equivalent sine wave, thus the break-make of gauge tap device (being the switching device in multi-electrical level inverter).
The hybrid algo-rithm that the present invention adopts carrier wave triangular wave phase shift SPWM to control and the stacked SPWM of carrier wave triangular wave controls: as a whole, between each H electric bridge element circuit, adopt carrier wave triangular wave phase shift SPWM to control, and the method that single H electric bridge element circuit adopts stacked SPWM to control, this modulator approach, output harmonic wave content is little, switching frequency is low, and can solve well the problem that inversion efficiency is low.
Carrier wave triangular wave phase shift SPWM controls method, refer to for N H electric bridge element circuit, adopt N phase place difference, but carrier wave triangular wave and same sinusoidal modulation wave that frequency is identical with amplitude compare, produce N group SPWM control impuls waveform and remove respectively to control N H bridge, make each H electric bridge element circuit all export the SPWM voltage waveform that fundamental voltage is identical, and then the SPWM voltage waveform of this N H electric bridge element circuit output is superposeed and synthesizes SPWM voltage with multiple levels waveform.
The Initial phase of N carrier wave triangular wave should be removed an angle successively, if adopt bipolarity carrier wave triangular wave, this angle is α=π/N; If unipolarity carrier wave triangular wave, angle is α=2 π/N.
The stacked SPWM control of carrier wave triangular wave method is to apply the SPWM modulation method of a kind of multi-electrical level inverter relatively early.The stacked SPWM modulation method of carrier wave triangular wave can be divided into two kinds, i.e. the stacked SPWM modulation method of individual layer and multilayer laminated formula SPWM modulation method, and these two kinds of methods can reach the technique effect of this patent.
The stacked SPWM modulation method of carrier wave triangular wave individual layer can be divided into again the stacked SPWM modulation method of the anti-phase individual layer of carrier wave triangular wave (single spin-echos of two carrier wave triangular waves) and the stacked SPWM modulation method of carrier wave triangular wave homophase individual layer (phase place of two carrier wave triangular waves is identical) according to the phase relation of two triangular carriers.The stacked SPWM modulation method of the anti-phase individual layer of carrier wave triangular wave and the stacked SPWM modulation method of carrier wave triangular wave homophase individual layer this in two modulator approach do not have what quality point, the present invention adopts the stacked SPWM modulation method of carrier wave triangular wave homophase individual layer.
In the stacked SPWM modulation method of carrier wave triangular wave homophase individual layer, two carrier wave triangular wave u
c1and u
c2phase place identical, its work wave is as shown in Figure 4.Wherein u
c1and u
c2for the carrier wave triangular wave of the upper and lower layer of transverse axis, u
sfor sinusoidal modulation wave.Compare with triangular wave with sinusoidal wave, at sinusoidal wave u
sthe part that is greater than triangular wave can produce output SPWM pulse, at sinusoidal wave u
sthe part that is less than triangular wave can produce the zero pulse of output voltage.Due to u
c1with u
c2be homophase, that is to say u
c1with u
c2be asymmetric with coordinate transverse axis, so by comparison sinusoidal wave and triangular wave, the positive half cycle of the output voltage SPWM waveform of generation is not identical with negative semiaxis.
Appoint and get a H electric bridge element circuit and study, from power angle analysis.If U
rjfor the output voltage of H electric bridge element circuit, I
sfor phase current, θ
jfor the angle of output voltage and phase current, the active power that H electric bridge element circuit absorbs is: P
ab=U
rji
scos θ
j, visible, just can change by changing H electric bridge element circuit output voltage size, phase current size and the angle between them active power that H bridge absorbs.Because phase current I
ssize and Orientation fix, so can only change the size and Orientation of H electric bridge element circuit output voltage, correspond to modulation ratio M and the phase shifting angle θ of pulse-width modulation circuit output.
The control strategy of chain type SVG adopts the control structure of layering: main total meritorious and reactive power of determining is controlled on upper strata, and it is mainly to regulate the reasonable distribution of gaining merit between this mutually each H bridge that lower floor controls, and ensures DC capacitor voltage balance.The method that upper strata of the present invention is controlled adopts a point phase current independently to control, calculate modulation ratio and the phase angle of the modulating wave of expectation, be that SIN function is superimposed upon on the modulating wave of this H electric bridge element circuit by the error quantization of each bridge DC side voltage, modulating wave phase place to each H electric bridge element circuit is finely tuned, and regulates the distribution of gaining merit between each H electric bridge element circuit.
There is not coupled relation in the three-phase dc side of chain type SVG, thereby can realize a point phase control, and three-phase system is compensated respectively, all can have reasonable compensation effect to balance sysmte and unbalanced system.The control strategy proposing in leading portion, its upper strata is controlled and is adopted the full decoupled control of current status, and transient response is fast, good stability, but the situation while only having considered three-phase equilibrium when controller designs is not considered the unbalanced problem of three-phase system.To power grid quality, investigation shows, line voltage more or less exists the asymmetric of phase place or amplitude, that is to say in actual conditions, and three-phase system is unbalanced mostly.
Auto by pass circuit, adopts auto by pass technology, and auto by pass technology is exactly directly by the bypass of fault power module AC, thereby realizes separating of malfunctioning module and device.By being set at the outlet side of each power unit module, a bypass mechanism realizes auto by pass.
Can adopt at the output of each H electric bridge element circuit and be provided with a relay, utilize to control often to open and realize fault H electric bridge element circuit with normally off and separate with this phase H bridge power model; Also can adopt rectifier bridge and IGCT, the output of each H electric bridge element circuit is connected to the rectifier bridge of two pairs of diode compositions, so IGCT is all the time under forward voltage drop.In the time that monitoring system detects power model internal fault, block immediately IGBT pulse, and trigger IGCT conducting, realize bypass and separate; Or employing bidirectional thyristor.
After having fault H electric bridge element circuit to be bypassed in a certain phase H bridge power model, if the pulse of the sinusoidal modulation signal of pulse-width modulation circuit output sends while sending still according to normal operation, and the output of this chain type SVG control system only has N H electric bridge element circuit output voltage stack, harmonic content will increase.Therefore,, for remaining N non-fault H electric bridge element circuit, modulation strategy need be done corresponding adjustment.
Because the stacked SPWM of carrier wave triangular wave just works in single H electric bridge element circuit inside, therefore malfunctioning module separates not impact of the stacked SPWM modulation of carrier wave triangular wave, only carrier wave triangular wave phase shift SPWM is impacted.So, analyze for convenient, only carrier wave triangular wave phase shift SPWM is analyzed.If when N+1 H electric bridge element circuit series connection, the carrier frequency of this chain type SVG control system is 1/T
c, the sampling period is T
s, when carrier wave is unipolarity, sampling period T
s=T
c/ [2 (N+1)].Separate the conventional method of adjustment of latter two to the H electric bridge element circuit that is out of order below.
First method: T
cconstant, T
schange
For simplifying the analysis, select before fault, establishing described multi-electrical level inverter number is n+1=6, the sampling period T of each phase H bridge power model
s=T
c/ 12, at 0/6T
s, T
s/ 7T
s, 2T
s/ 8T
s, 3T
s/ 9T
s, 4T
s/ 10T
s, 5T
s/ 11T
smoment sample modulation ripple, and relatively generate corresponding trigger impulse, as shown in Figure 5.
If a certain H electric bridge element circuit is because of break down separated rear (supposing that first H electric bridge element circuit is separated), if modulation strategy not being adjusted accordingly, remain the pulse generate sequential of N non-fault H electric bridge element circuit as shown in Fig. 6 (a).As can be seen from the figure the sampling interval between H electric bridge element circuit 0 and H electric bridge element circuit 2 is 2T
sbut the sampling interval between other power H electric bridge element circuit is T
s, this does not obviously meet the general principle of phase-shifted SPWM modulation.The harmonic content of the output voltage of SVG device must increase.
If carrier cycle is constant, be still T
c, but by the sampling period at T
cinside readjust.As shown in Fig. 6 (b), after fault, the quantity of described multi-electrical level inverter becomes 5, thereby the sampling period after modulation is T
s'=T
c/ 10.The complete phase-shifting carrier wave output pulse of N=5 will be produced like this.
The method is adjusted the switch modulation strategy of this phase phase-shifted SPWM by changing the sampling period of fault phase (a phase H bridge power model at the H electric bridge element circuit place of breaking down).Concerning this phase, can play good regulating action.
Second method: T
cchange T
sconstant
When first H electric bridge element circuit breaks down when separated, keep sampling period T
sconstant, adjust carrier wave triangular wave cycle of this phase.As shown in Figure 7.
After adjusting, the carrier cycle of fault phase is Tc ', keeps the carrier cycle Tc of other healthy phases constant.Pulse sequence after adjustment is as shown in Fig. 7 (b): in 0/5Ts, Ts/6Ts, 2Ts/7Ts, 3Ts/8Ts, 4Ts/9Ts moment, a sample modulation ripple generates the trigger impulse of H bridge power model.Like this, obtained the phase-shifted SPWM impulse modulation waveform of complete N=5.Because the sampling period of fault phase does not change before and after malfunctioning module separates, after fault separates, still can ensure the synchronism of three-phase current sampling.
The clean method of described point of phase current independent controling circuit.See Fig. 3, v in figure
ab, v
bc, v
ca, collect three-phase voltage instantaneous value for Acquisition Circuit;
the voltage-phase of the three phase mains tracing into for PLL;
for each phase reactive current reference value;
for the average voltage of the DC bus capacitor of each phase H bridge power model; u
efthe voltage reference value of DC bus capacitor; i
ab, i
bc, i
cafor Acquisition Circuit collects three-phase current instantaneous value; Can calculate the reference signal of SVG output voltage by corresponding PI controller, more further calculate the voltage reference value of corresponding each phase reactive current reference value and DC bus capacitor according to Instantaneous Power Theory.The concrete grammar of the voltage reference value of above-mentioned acquisition each phase reactive current reference value and DC bus capacitor refers to document: Yang Jun, Wang Zhaoan, Qiu Guanyuan. a kind of detection method [J] of Harmonic in Single-phase Circuit and reactive current, electrotechnics journal, 1996 (3), 11 (3): 42-46; Jiang Bin, Yan Gangfeng, Zhao Guangzhou. single-phase circuit Instantaneous Harmonic and real time sampling idle new method [J]. Automation of Electric Systems, 2000 (11): 36-39.
The clean method of described titanium storage tank, comprising:
The clean method of described chain type SVG device comprises the steps:
A: in the time that a H electric bridge element circuit damages, corresponding this H electric bridge element circuit of auto by pass circuit bypass;
B: described pulse-width modulation circuit is keeping on constant basis of sampling period of described sample circuit, change the carrier frequency of the described carrier wave triangular wave phase shift SPWM of a phase H bridge power model at the H electric bridge element circuit place of described damage, to obtain the impulse modulation waveform of the carrier wave triangular wave phase shift SPWM corresponding with remaining H electric bridge element circuit quantity in this phase H bridge power model;
The clean method of described point of phase current independent controling circuit comprises the steps:
(1) by phaselocked loop according to the instantaneous value of voltage of the described three phase mains of input to follow the tracks of the voltage-phase of described three phase mains;
(2) voltage-phase drawing according to described phaselocked loop calculates the cosine amount of this voltage-phase and multiplies each other with a reactive current reference value, to obtain actual reactive current output;
(3) voltage-phase drawing according to described phaselocked loop calculates the sinusoidal quantity of this voltage-phase, subtract each other according to the voltage reference value of the average voltage of the DC bus capacitor of described each phase H bridge power model and a DC bus capacitor simultaneously and multiply each other with described sinusoidal quantity again after PI controls, to obtain actual watt current output;
(4) for first the electric current of given described reactive current module and the given module output of watt current being superposeed, then deduct the transient current in described three phase mains, and by controller to calculate modulation ratio M and the phase angle δ of the required sinusoidal modulation wave of described pulse-width modulation circuit.
Obviously, above-described embodiment is only for example of the present invention is clearly described, and is not the restriction to embodiments of the present invention.For those of ordinary skill in the field, can also make other changes in different forms on the basis of the above description.Here without also giving exhaustive to all embodiments.And these belong to apparent variation that spirit of the present invention extended out or variation still among protection scope of the present invention.
Claims (1)
1. a clean method for titanium storage tank, is characterized in that comprising:
1. under sealing state, utilize feeding engine to wash away the mud of sedimentation in described titanium storage tank, make its suspension;
2. then the mud of suspension is squeezed into concentrator, clarify;
Repeating step 1., 2., until described titanium storage tank is without mud;
Connect one at the three-phase power input end of described titanium storage tank and be suitable for correcting the chain type SVG device of power factor;
Described chain type SVG device comprises:
The multi-electrical level inverter of H electric bridge multi-type, it is made up of the three-phase H bridge power model that is connected in described three phase mains, wherein, sets up at least one H electric bridge element circuit for subsequent use in every phase H bridge power model;
Auto by pass circuit, is located at the output of each H electric bridge element circuit, and in the time that a H electric bridge element circuit is damaged, by this H electric bridge element circuit bypass;
Sample circuit, is suitable for the instantaneous value of the voltage and current that gathers described three phase mains;
Divide phase current independent controling circuit;
Pulse-width modulation circuit, is connected with described point of phase current independent controling circuit;
Described point of phase current independent controling circuit is connected with described sample circuit, be suitable for according to the instantaneous value of the voltage and current of described three phase mains, calculate modulation ratio M and the phase angle δ of the required sinusoidal modulation wave of described pulse-width modulation circuit, described pulse-width modulation circuit is for controlling the carrier wave triangular wave phase shift SPWM adopting between each H electric bridge element circuit according to the modulation ratio M of described sinusoidal modulation wave and phase angle δ; ; when after the H electric bridge element circuit bypass damaging; this pulse-width modulation circuit is suitable for keeping on constant basis of sampling period of described sample circuit; change the carrier frequency of the described carrier wave triangular wave phase shift SPWM of a phase H bridge power model at the H electric bridge element circuit place of this damage, to obtain the impulse modulation waveform of the carrier wave triangular wave phase shift SPWM corresponding with remaining H electric bridge element circuit quantity in this phase H bridge power model.
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410623423.9A CN104467397B (en) | 2012-12-13 | 2012-12-13 | Chain type SVG device suitable for correcting power factor and improving utilization rate of transformer |
| CN201410633500.9A CN104492767B (en) | 2012-12-13 | 2012-12-13 | Working method of chained SVG (static var generator) device which is used for titanium storage tank and applicable to improving utilization rate of transformer |
| CN201410637606.6A CN104466977B (en) | 2012-12-13 | 2012-12-13 | The method of work of the chain type SVG device of transformer utilization factor can be improved |
| CN201210540791.8A CN103128083B (en) | 2012-12-13 | 2012-12-13 | Cleaning method of titanium storage tank |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210540791.8A CN103128083B (en) | 2012-12-13 | 2012-12-13 | Cleaning method of titanium storage tank |
Related Child Applications (3)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410623423.9A Division CN104467397B (en) | 2012-12-13 | 2012-12-13 | Chain type SVG device suitable for correcting power factor and improving utilization rate of transformer |
| CN201410633500.9A Division CN104492767B (en) | 2012-12-13 | 2012-12-13 | Working method of chained SVG (static var generator) device which is used for titanium storage tank and applicable to improving utilization rate of transformer |
| CN201410637606.6A Division CN104466977B (en) | 2012-12-13 | 2012-12-13 | The method of work of the chain type SVG device of transformer utilization factor can be improved |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103128083A CN103128083A (en) | 2013-06-05 |
| CN103128083B true CN103128083B (en) | 2014-12-10 |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5065781A (en) * | 1990-03-22 | 1991-11-19 | Cox Ernest J | Storage tank cleanout apparatus |
| CN1199863C (en) * | 2002-07-19 | 2005-05-04 | 锦州铁合金（集团）有限责任公司钛白粉厂 | Technique and method for treating titanium tetrachloride slurry containing vanadium |
| US20080047587A1 (en) * | 2006-08-22 | 2008-02-28 | Ball David M | Method and apparatus for cleaning tanks and other containers |
| CN100455527C (en) * | 2007-03-27 | 2009-01-28 | 南京工业大学 | Deoiling treatment process for oily sludge |
| CN101445938A (en) * | 2008-12-05 | 2009-06-03 | 遵义钛业股份有限公司 | Brass wire cleaning method during titanium tetrachloride refining process by removing vanadium from a brass wire |
| CN202206145U (en) * | 2011-06-28 | 2012-04-25 | 辽宁荣信众腾科技有限公司 | Restraining device for low-frequency oscillation of voltage of distribution network |
| CN102255327A (en) * | 2011-07-08 | 2011-11-23 | 荣信电力电子股份有限公司 | Method for solving three-phase voltage imbalance by using SVG (Static Var Generator) |
| CN102441549A (en) * | 2011-12-22 | 2012-05-09 | 唐山天赫钛业有限公司 | Method for removing mud out of titanium-tetrachloride storage tank in production process of titanium tetrachloride |
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2012
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