CN101768753B - Rapid combination method for chlorine gas and hydrogen gas of electrolysis bath - Google Patents
Rapid combination method for chlorine gas and hydrogen gas of electrolysis bath Download PDFInfo
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- CN101768753B CN101768753B CN2008100802736A CN200810080273A CN101768753B CN 101768753 B CN101768753 B CN 101768753B CN 2008100802736 A CN2008100802736 A CN 2008100802736A CN 200810080273 A CN200810080273 A CN 200810080273A CN 101768753 B CN101768753 B CN 101768753B
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Abstract
The invention belongs to the technical field of ionic membrane caustic soda production, in particular a rapid combination method for chlorine gas and hydrogen gas of electrolysis bath. In a whole pressurization course, the conventional combination technology of chlorine gas and hydrogen gas is operated complexly; besides an automatic regulation device on a pipeline for emptying the hydrogen gas adopts the automatic regulation all the time, the whole pressurization course is finished by changing the set value of the automatic device; a DCS programme automatically controls a valve switch to be opened or closed according to the change of the set value; the opening of the valve switch is non-uniform and has a large waveform peak; the opening is difficult to control and easy to cause wide fluctuation of pressure and pressure difference; just a little relax, the craft interlocking condition can be reached probably to result in the tripping. In the invention, four automatic regulation devices are installed in the system; each set of automatic regulation device consists of a button switch with the opening of 1%, a button switch with the close degree of 1%, a button switch with the opening of 0.2% and a button switch with the close degree of 0.2% in the manual operation, so that the pressure and the pressure difference are easily controlled, and the whole combination time is shortened from 5-6 hours to 2-3 hours.
Description
(1) technical field
The present invention relates to the ion film caustic soda production technical field, the method for chlorine gas and hydrogen gas of electrolysis bath rapid combination specifically is with chlorine, hydrogen interconnection technology stably in the short period of time when electrolyzer is driven.
(2) background technology
Continuous development along with production of caustic soda enterprise, ionic membrane method is produced the caustic soda technology and is used by increasing domestic enterprise, the electrolyzer of UHDENORA (Wu Di) company because of its low power consumption, high electric density, corrosion-resistant, leakage rate is low, maintenance is easy to assembly etc., and advantage is adopted by More and more factories, but also there is a very big shortcoming in the Wu Di system, be exactly that to drive to rise current time long, generally need five to six hours, and a key link of restriction driving progress is exactly the also net operation of chlorine, hydrogen, original interconnection technology complicated operation.The aperture of valve was inhomogeneous when driving was incorporated into the power networks, and is wayward, and easily build-up of pressure and pressure reduction significantly fluctuate, and is careless slightly, just might reach technology interlocking condition and cause jumping car.
(3) summary of the invention
The object of the present invention is to provide a kind of method of chlorine gas and hydrogen gas of electrolysis bath rapid combination, this method can overcome above-mentioned shortcoming, simplifies and net operation, thereby shortens the driving time.
Startup procedure is exactly gradually electric current to be raised to ultimate current, and along with the growth of electric current, chlorine and hydrogen pressure also increase gradually.Earlier chlorine is incorporated into the power networks in rising the electric current process, along with the growth of electric current, when electric current was raised to ultimate current, hydrogen also also networked.
So-called chlorine is incorporated into the power networks and exactly the chlorine automatic-adjusting device on the chlorine Trunk Line of dechlorination hydrogen treatment process is opened, and will go the automatic-adjusting device on the Trunk Line on useless chlorine absorption tower to close; It is that automatic-adjusting device with on the Trunk Line of dehydrogenation gas disposal operation is opened that hydrogen is incorporated into the power networks, and automatic-adjusting device on the pipeline of dehydrogenation gas emptying cuts out.
Under dead ship condition, before promptly not having driving, automatic-adjusting device A and automatic-adjusting device B close, automatic-adjusting device B ' standard-sized sheet, at electric current during less than 2.7KA, to the accident chlorine absorption tower, arrange to hydrogen gas fire arrester emptying by automatic-adjusting device B ' by the hydrogen that is produced by valve automatic-adjusting device A ' row for the chlorine that is produced.In whole startup procedure and operational process, have that automatic time delay stopped in 120 seconds during up to 240mbar, chlorine gas pressure stops during up to 280mbar automatically immediately, hydrogen pressure reduction automatic stopping technology interlocking when 120 seconds automatic stoppings of time-delay, hydrogen pressure reduction are up to 80mar during up to 60mbar when chlorine gas pressure, in driving and operational process, as long as condition reaches technology interlocking condition, whole electrolyzer stops immediately.
Technical scheme of the present invention is as follows: chlorine automatic-adjusting device A is installed, the major control chlorine gas pressure on the chlorine Trunk Line of dechlorination hydrogen treatment process; On the Trunk Line that goes to useless chlorine absorption tower, chlorine automatic-adjusting device A ' is installed also; Automatic-adjusting device B is installed on the Trunk Line of dehydrogenation gas disposal operation, and major control chlorine hydrogen pressure is poor; Automatic-adjusting device B ' is installed on the pipeline of dehydrogenation gas emptying; Every cover automatic-adjusting device under manual operation state by opening 1%, close 1%, open 0.2%, forming for closing 0.2% 4 switch;
The chlorine gas and hydrogen gas combination method is as follows:
When electrolyzer rises electric current, set earlier electric current slope 50A/min, set according to processing requirement and rises current setting value, rise to set(ting)value in automatically, when actual current represents when electric current equates that liter expires electric current with setting according to the slope current of setting.Generally, for reaching ultimate current, current setting value is divided into 3 joints to carry out, and sets and is respectively 2.7KA, 5KA surely, reaches ultimate current 12.24KA.Along with electric current growth gradually, also gradually the growth of chlorine gas and hydrogen gas pressure, under the situation that guarantees chlorine and hydrogen gas pressure stabilization, whole and network process is divided into two processes:
(1) chlorine is incorporated into the power networks
After electrolytic cell currents rises to 1KA, close the chlorine hydrogen house steward's nitrogen valve that confluxes, rise electric current then, chlorine gas pressure is increased gradually, when chlorine gas pressure is above greater than 10mbar, under the situation of chlorine hydrogen pressure reduction all-the-time stable at 40mbar, chlorine gas pressure automatic-adjusting device A, A ' becomes manual operation, promptly go up to beat and be the manual operation shelves at operating console (DCS), open pressure automatic adjusting device A gradually by repeatedly clicking 1% or 0.2% press button, while is closing presure automatic-adjusting device A ' gradually, is " 0 " until pressure automatic adjusting device A ' Close All.When approximately electric current is raised to 2.7～3.5KA, automatic-adjusting device A ' contract fully.Chlorine is incorporated into the power networks and finishes.For the back automatic-adjusting device A that is incorporated into the power networks, along with the progressively rising of electric current, chlorine gas pressure also progressively raises, and valve still adopts clicks 0.2% button opening gradually.When electric current was raised to ultimate current, chlorine gas pressure approximately was controlled at 160mbar, and chlorine gas pressure automatic-adjusting device A, A ' are made as automatic operation at DCS, and the set(ting)value (SV) of device A is set at 160mbar, and device A ' set(ting)value (SV) is set at 200mbar.After this, chlorine gas pressure automatic-adjusting device A, A ' adopt automatically and regulate, and regulate automatically by operating console (DCS).
(2) hydrogen is incorporated into the power networks
After being incorporated into the power networks, chlorine begins and hydrogen, automatic-adjusting device B beats to manually, by repeatedly clicking 1% or 0.2% press button, open gradually, automatic-adjusting device B ' still adopts automatically simultaneously, (automatic-adjusting device B ' is also adopting auto state in the network process all the time) turns down valve under the DCS time variable control automatically, is " 0 " until closing.Automatic-adjusting device B ' closes to after " 0 ", and just the set(ting)value (SV) with automatic-adjusting device B ' is made as 50mbar, guarantees that it keeps closing condition under the ordinary production situation.
Advantage of the present invention is to open 1% by having installed on the programme controlled chlorine hydrogen pressure of the DCS difference Controlling System, close 1%, open 0.2%, close 0.2% 4 kind of by-pass cock, realized micro-adjusting, pressure reduction in the system, pressure are controlled easily, avoided occurring automatic stopping technology interlocking problem, therefore optimized and net operation, shortened the time of driving, increased about 2 hours output, improve throughput, year increases about 4320 tons of caustic soda production, 600 yuan per ton, add up to 259.2 ten thousand yuan, the economic benefit of creation is considerable.
(4) description of drawings
Fig. 1 is chlorine gas and hydrogen gas pressure reduction Controlling System figure of the present invention
(5) specific implementation method:
Among the figure A for dechlorination hydrogen handle chlorine pipeline automatic-adjusting device, A ' for to remove useless chlorine absorption tower pipeline chlorine automatic-adjusting device, B be dehydrogenation gas disposal pipeline automatic-adjusting device, B ' for dehydrogenation gas blow-down pipe hydrogen automatic-adjusting device ,+for open 1% switch ,-be pass 1% switch, ++ for open 0.2% switch,--for closing 0.2% switch.Described four automatic-adjusting devices are by the supply of material of the gloomy valve of German Sa mother manufacturer.
As can be seen from Figure 1, chlorine automatic-adjusting device A is installed, the major control chlorine gas pressure on the chlorine Trunk Line of dechlorination hydrogen treatment process; On the Trunk Line that goes to useless chlorine absorption tower, chlorine automatic-adjusting device A ' is installed also; Automatic-adjusting device B is installed on the Trunk Line of dehydrogenation gas disposal operation, and major control chlorine hydrogen pressure is poor; Automatic-adjusting device B ' is installed on the pipeline of dehydrogenation gas emptying; Every cover automatic-adjusting device is by opening 1%, close 1%, open 0.2%, forming for closing 0.2% 4 switch;
The chlorine gas and hydrogen gas combination method is as follows:
(1) chlorine is incorporated into the power networks
After electrolytic cell currents rises to 1KA, close the chlorine hydrogen house steward's nitrogen valve that confluxes, rise electric current then, chlorine gas pressure is increased gradually, when chlorine gas pressure is above greater than 10mbar, under the situation of chlorine hydrogen pressure difference all-the-time stable at 40mbar, chlorine gas pressure automatic-adjusting device A, A ' becomes manual operation, promptly go up to beat and be the manual operation shelves at operating console (DCS), open pressure automatic adjusting device A gradually by repeatedly clicking 1% or 0.2% press button, while is closing presure automatic-adjusting device A ' gradually, is " 0 " until pressure automatic adjusting device A ' Close All.When approximately electric current is raised to 2.7～3.5KA, automatic-adjusting device A ' contract fully.Chlorine is incorporated into the power networks and finishes.For the back automatic-adjusting device A that is incorporated into the power networks, along with the progressively rising of electric current, chlorine gas pressure also progressively raises, and valve still adopts clicks 0.2% button opening gradually.When electric current was raised to ultimate current, chlorine gas pressure approximately was controlled at 160mbar, and chlorine gas pressure automatic-adjusting device A, A ' are made as automatic operation at DCS, and the set(ting)value (SV) of device A is set at 160mbar, and device A ' set(ting)value (SV) is set at 200mbar.After this, chlorine gas pressure automatic-adjusting device A, A ' adopt automatically and regulate, and regulate automatically by DCS.
(2) hydrogen is incorporated into the power networks
Begin after chlorine is incorporated into the power networks and hydrogen, automatic-adjusting device B ' under operation shape automatically, automatic-adjusting device B beats to manually, by repeatedly clicking 1% or 0.2% press button, open gradually, automatic-adjusting device B valve turns down under the DCS time variable control, is " 0 " until closing.Automatic-adjusting device B ' closes to after " 0 ", and just the set(ting)value (SV) with automatic-adjusting device B ' is made as 50mbar, guarantees that it keeps closing condition under the ordinary production situation.
Claims (1)
1. the method for a chlorine gas and hydrogen gas of electrolysis bath rapid combination is characterized in that installing chlorine automatic-adjusting device A, major control chlorine gas pressure on the chlorine Trunk Line of dechlorination hydrogen treatment process; On the Trunk Line that goes to useless chlorine absorption tower, chlorine automatic-adjusting device A ' is installed also, the control chlorine gas pressure; Automatic-adjusting device B is installed on the Trunk Line of dehydrogenation gas disposal operation, and major control chlorine hydrogen pressure is poor; Automatic-adjusting device B ' is installed on the pipeline of dehydrogenation gas emptying, and it is poor also to control the chlorine hydrogen pressure; Every cover automatic-adjusting device under manual operation state by opening 1%, close 1%, open 0.2%, forming for closing 0.2% 4 switch;
The chlorine gas and hydrogen gas combination method is as follows:
When electrolyzer rises electric current, set electric current slope 50A/min earlier, set according to processing requirement and rise current setting value, rise to set(ting)value automatically, when actual current equates with the setting electric current, represent to rise full electric current according to the slope current of setting; Generally, for reaching ultimate current, current setting value is divided into 3 joints to carry out, and set(ting)value is respectively 2.7kA, 5kA, reaches ultimate current 12.24kA;
(1) chlorine is incorporated into the power networks
After electrolytic cell currents rises to 1kA, close the chlorine hydrogen house steward's nitrogen valve that confluxes, rise electric current then, chlorine gas pressure is increased gradually, when chlorine gas pressure is above greater than 10mbar, under the situation of chlorine hydrogen pressure difference all-the-time stable at 40mbar, chlorine gas pressure automatic-adjusting device A, A ' become manual operation, promptly on operating console, beat and be the manual operation shelves, open pressure automatic adjusting device A gradually by repeatedly clicking 1% or 0.2% press button, while is closing presure automatic-adjusting device A ' gradually, is " 0 " until pressure automatic adjusting device A ' Close All; When electric current is raised to 2.7～3.5kA, automatic-adjusting device A ' contract fully; Chlorine is incorporated into the power networks and finishes the back along with the progressively rising of electric current, and chlorine gas pressure also progressively raises, and automatic-adjusting device A still adopts and repeatedly clicks 0.2% button opening gradually; When electric current is raised to ultimate current, chlorine gas pressure approximately is controlled at 160mbar, chlorine gas pressure automatic-adjusting device A, A ' are made as automatic operation on operating console, the set(ting)value of chlorine gas pressure automatic-adjusting device A is set at 160mbar, and chlorine gas pressure automatic-adjusting device A ' set(ting)value is set at 200mbar; So far, regulate chlorine gas pressure automatic-adjusting device A, A ' automatically by operating console;
(2) hydrogen is incorporated into the power networks
Beginning hydrogen after chlorine is incorporated into the power networks is incorporated into the power networks, be in the situation of automatic operation shelves as automatic-adjusting device B ', automatic-adjusting device B is beaten to manually, by repeatedly clicking 1% or 0.2% press button, open automatic-adjusting device B gradually, automatic-adjusting device B ' can turn down valve under the DCS time variable control automatically simultaneously, is " 0 " until closing; Automatic-adjusting device B ' closes to after " 0 ", and just the set(ting)value with automatic-adjusting device B ' is made as 50mbar, guarantees that it keeps closing condition under the ordinary production situation.
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| CN2008100802736A CN101768753B (en) | 2008-12-29 | 2008-12-29 | Rapid combination method for chlorine gas and hydrogen gas of electrolysis bath |
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| CN102424980B (en) * | 2011-11-29 | 2014-03-12 | 泸州北方化学工业有限公司 | Electrolysis system with ion membrane electrolyzer and pressure regulating method thereof |
| CN102644786A (en) * | 2012-02-13 | 2012-08-22 | 首钢水城钢铁（集团）有限责任公司 | Method for performing segmentation automatic control on valve |
| CN109518224B (en) * | 2018-10-30 | 2020-05-15 | 金川集团股份有限公司 | Emergency PLC control process for caustic soda system |
| CN111538357A (en) * | 2020-04-21 | 2020-08-14 | 新疆中泰创新技术研究院有限责任公司 | Single-cell overpressure protection device and method for electrolytic cell |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1090891A (en) * | 1993-02-12 | 1994-08-17 | 德·诺拉·帕尔梅利有限公司 | Improved porous diaphragm electrolyzer and the using method that is used for the production of chloro-alkali |
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Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1090891A (en) * | 1993-02-12 | 1994-08-17 | 德·诺拉·帕尔梅利有限公司 | Improved porous diaphragm electrolyzer and the using method that is used for the production of chloro-alkali |
Non-Patent Citations (1)
| Title |
|---|
| 张佳兴等.两期离子膜电解氯气压缩机前并网的实施.《中国氯碱》.2007,(第09期),31-32. * |
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