CN1864816A - Method and apparatus for inhibiting crystallisate production of leaching system - Google Patents
Method and apparatus for inhibiting crystallisate production of leaching system Download PDFInfo
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- CN1864816A CN1864816A CN 200610042701 CN200610042701A CN1864816A CN 1864816 A CN1864816 A CN 1864816A CN 200610042701 CN200610042701 CN 200610042701 CN 200610042701 A CN200610042701 A CN 200610042701A CN 1864816 A CN1864816 A CN 1864816A
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Abstract
The invention discloses a auxiliary device for system of eluting raw gas, dry gas or exhaust gas in producing process in chemical industry and metallurgy industry, which is used to reduce deposition of crystal matter in elution tower or apparatus. The elution liquid passes a high-frequency electric field before entering into eluting device. The container provided with liquid inlet and outlet pipe is equipped with electrode, which is connected with inner core of output coaxial cable in high-frequency alternator, the shell of container is connected with short circuit of outer shielding layer.
Description
Technical field
The present invention relates to a kind of industries such as chemical industry, metallurgy that are used for unstripped gas, dry gas product or the tail gas of production process is carried out the servicing unit of the system of drip washing, this device can effectively delay or avoid crystal to form the deposition of crystallization in elution circuit.The present invention is particularly suitable for major part to the process tail gas that contains acid group that is produced in the chemical industry production process, production process and contains the acid group unstripped gas and contain acid group dry gas product and carry out drip washing with alkaline solution, in removing gas when acid group and other harmful substance, reduce cavity inner wall, grid, the trapping layer of the crystal of processing procedure formation, and deposit on the draught fan impeller at eluting column or drip washing equipment.
Background technology
In the chemical industry production process, most unstripped gas and dry gas product, as ammonia, alkane, hydrogen, oxygen, chlorine, nitrogen, fluorine, vapo(u)rizing oil and tail gas etc., majority contains other sour gas and impurity and harmful substance, because sour gas that exists in unstripped gas and the dry gas product and impurity and harmful substance can cause production process, product quality and have a strong impact on, and the cognition of the sour gas in the tail gas pollutes environment.
For solving the problem of above-mentioned existence, most alkaline solutions that adopt carry out the method for drip washing to it, to remove sour gas and impurity and the harmful substance that exists in unstripped gas, dry gas product and the tail gas, guarantee production process unstripped gas, dry gas product quality and make tail gas reach discharge standard.But, in the technical process of drip washing, because the sour gas that exists in eluent solution and unstripped gas, dry gas product and the tail gas, when reacting the new compound of generation, also incite somebody to action other substance trapping of part among solution, compound that these are newly-generated and material are owing to exist potential difference with elution circuit, its solvability is tending towards saturated, its quality greater than reasons such as solution, make the positions such as draught fan impeller in its as easy as rolling off a log grid, inwall, trapping layer and the system form crystallization and deposition at eluting column with solution.When these crystallizations and deposit after forming on the grid, can reduce the breathing area of grid, form bigger vapour lock, cause the gas velocity can be more and more higher by grid, formed high-speed jet can bring to more solution at positions such as trapping layer, draught fan impeller again, causes more crystallization in above-mentioned position and deposition, and so vicious circle makes the crystallization at above-mentioned each position and deposits more and more serious, have a strong impact on the operate as normal of equipment, even the repairing that stops production of having to.The disastrous effect that this situation causes mainly contains following three aspects:
The total sectional area of 1 grid air gap is more and more littler, in order to keep required negative pressure by enough tolerance, just has to by increasing the power of id-motor, and the result has caused waste of electric energy; Increase simultaneously and form high-speed gas jet after the air inducing amount and can carry away more solution, therefore have to add new solution, caused the raw material and the waste of manpower resource such as alkali of water, preparation.
2 work as the grid air gap because of crystallization, sedimental influence, and its total sectional area is little to be arrived to a certain degree, when perhaps crystal and deposit reach certain thickness on trapping layer, the draught fan impeller, and cleaning crystallization and the deposit of stopping production of just having to.So the consequence that produces is that system moves under abnormal working condition, not only influences the drip washing effect, but also can increase the emission of harmful substances amount, causes environmental pollution, is unfavorable for cleaner production.
Be forced to stop production cleaning crystallization and deposit also exists following drawback: A directly to influence the output of product; B causes waste of manpower resource; C causes more unsafe factor, for example can cause personnel's damage, is unfavorable for safety in production.D has improved the integrated cost of product.
3 after producing crystallization and deposit on the draught fan impeller, can destroy the dynamic balancing of air-introduced machine, not only can produce bigger noise, but also can damage in the short period of time air-introduced machine axle, watt or bearing, add the hidden danger that large equipment has an accident.
Be head it off, drip washing solution is prepared with deionized water by part enterprise.But because of crystallization is because a large amount of newly-generated compounds and trapped due to other material in the gas by leacheate in the lessivation, so produce little effect.
Present stage does not find to solve the active effective way of crystallization and deposition problems as yet.
Summary of the invention
The invention provides a kind of method and device that can effectively stop the elution circuit crystal to produce, to solve existing problem.
Method of the present invention is that drip washing liquid is passed through a high-frequency electric field earlier before entering elution device, with high-frequency electric field it is acted on.Test shows makes leacheate pass through high-frequency electric field, and positive effect can be arranged.
Show that according to relevant test the frequency of eluent solution being carried out the high-frequency electric field processing is 2000KHz～30000KHz, the general power of the electricity consumption that makes is 0.2KVA～0.7KVA/100m
3H.The frequency of its best electric field is 3000KHz～8000KHz, and the time minimum that liquid is applied in high-frequency electric field is 1 second.High-frequency electric field best power of the present invention is 0.3KVA～0.6KVA/100m
3H.
Realize the device of the method for the invention, be that treating apparatus is to be provided with electrode in the container that has liquid input and output pipe, this electrode links to each other with the inner core of the output coaxial cable of high-frequency energy generator, and the shell of container links to each other with the outer shielding layer short circuit of the output coaxial cable of high-frequency energy generator.The employed high-frequency energy generator of device of the present invention system makes up with commercial HF signal generator and commercial high frequency power amplifier.
The container cross section of apparatus of the present invention is circular, and its input pipe is located at the bottom of container, and its efferent duct is located at the top of container, can make the liquid that carries out container obtain best treatment effect like this.
First kind of set-up mode of the electrode of apparatus of the present invention is the center of it being located at container.
The big amount of liquid of device handle to(for) need should be provided with the electrode more than two in container, the position is set satisfies following condition of electrode, promptly between two electrodes between the distance be diameter, and do one with container be the same center of circle, and the circle of crossing two electrodes is divided into inside and outside two parts with the cross section of container, wherein be positioned at the inner area of this " circle " and should be equal to or slightly less than the outside annulus area of this " circle " substantially, adopt this structure that the liquid in the container handling is in the uniform electric field.In one embodiment of the invention, electrode is 60% place that is arranged at close housing place and equals container cross section centre-to-centre spacing inner walls distance.The operating frequency difference of two electrodes is preferably in the scope of 300KHz～800KHz in same container.Be provided with an auxiliary electrode at the container cross section center, auxiliary electrode links to each other with the shell short circuit.The electrode diameter that is adopted in this most preferred embodiment is 16 millimeters, and the diameter of auxiliary electrode is 25～75 millimeters.
Its frequency of employed high frequency electric source should satisfy 2000KHz～30000KHz in the device of the present invention, and closing between employed electrical power and institute drip washing liquid measure to be processed is 0.2KVA～0.7KVA/100m
3H.The frequency of its best electric field is 3000KHz～8000KHz, and the time minimum that liquid is applied in this electric field should be not less than for 1 second, and satisfying of this condition can realize by the mode of setting container height and regulator solution rate of flow of fluid.The test that the inventor carried out shows that the best power of handling electric field is 0.3KVA～0.6KVA/100m
3H.
Show according to relevant test, adopt two its best results of the container that is in series in the treating apparatus of the present invention, the operating frequency range that wherein is in the container of upstream does not wait with the operating frequency range that is in the container in downstream.Effect was more satisfactory when the operating frequency range of two container handlings differed 200KHz～1000KHz.
Test shows that the leacheate body carries out drip washing again after device of the present invention is handled, and can obviously delay crystallization deposition, prolongs the cycle of cleaning crystallization deposition thing greatly.Test can prolong the time of adding leacheate after also finding to adopt method of the present invention, device, reduces to add in leacheate the quantity of alkali, greatly reduces production cost, ensures normally carrying out of producing, and has improved product quality.The probability that simultaneously can also reduction equipment has an accident.
Description of drawings
Fig. 1 is the schematic diagram of a most preferred embodiment container handling of the present invention.
Fig. 2 is the cross-sectional schematic of Fig. 1.
Fig. 3 is the schematic diagram of another most preferred embodiment container handling of the present invention.
Fig. 4 is the cross-sectional schematic of Fig. 3.
Fig. 5 adopts the embodiment schematic diagram of two series connection container handlings for the present invention.
In above-mentioned figure: (1) cover cap for being provided with for protection high-frequency electrical energy input high-frequency electrical energy terminals; (2) for forming the upper cover plate of airtight container; (3) be shell; (4) be processed liquid input tube; (5) be liquid output pipe; (6) be the last seal of electrode and container; (7) be fluid chamber; (8) be electrode; (9) be the following seal of electrode and container; (10) for forming the low head plate of airtight container; (11) for being located at the introducing high frequency feed cable inlet on the cover cap; (12); (13) form the high-frequency electrical energy terminals jointly; (14) be the upper cover plate on the container that has bipolar electrode; (15) be the auxiliary electrode that links to each other with housing; (16) be the terminals of bipolar electrode; (17) be storage liquid container (being pending liquid storage jar); (18) be system's adpting flange; (19) be liquid delivery pump; (20) be first order liquid handling container; (21) be liquid return tube; (22) be second level liquid handling container, (23) are eluting column, and (24) are by the drip washing gas access; (25) be connecting pipeline; (26) be shell, (27) are the grid of eluting column, and (28) are the trapping layer of eluting column; (29) be the air-introduced machine of eluting column, (30) are the exhaust outlet of eluting column.
The specific embodiment
The present invention describes in detail below in conjunction with embodiment and accompanying drawing:
Fig. 1 is an embodiment of apparatus of the present invention, the high-frequency electrical energy terminals that comprise electrode terminal 12,13 are set in the cover cap 1 of container handling, for making its coupling, necessary inductance or capacitor element also can be set therein, 3 is shell, it is provided with processed liquid input tube 4 in the bottom down, is being provided with liquid output pipe 5 near the place, top.As seen from the figure, liquid input tube wherein is connected with liquid output pipe and cylindrical shell are tangent, and this connection can make the liquid that carries out container produce rotational flow, fully acts on mutually with the electric field that is produced by electrode.
Fig. 2 is the internal structure schematic diagram of first embodiment of the present invention.As seen from the figure, the top of fluid chamber 7 be provided be used for fixing electrode 8 on seal 6, the lower end of electrode 8 is fixed on the low head plate 10 with following seal 9.On cover cap 1, be provided with hole 11, so that high-frequency feed line is introduced in it.In cover cap, be provided with the high-frequency electrical energy terminals of forming by cable socket 12,13, connect with the feedback of realization with electrode and high-frequency feed line.The metal shell of container is connected with the outer shielding layer short circuit of high-frequency feed line cable.Obviously will form the electromagnetic field of high frequency between electrode and shell, be full of at 7 o'clock as liquid, liquid will become between conduction electrode and shell by " medium " of high-frequency electromagnetic field action.
Fig. 3 is the outside schematic diagram of an alternative embodiment of the invention, it is identical with the embodiment outside of accompanying drawing 1 basically, only be that its liquid input tube and liquid output pipe are provided with flange, so that connect with system, but its inner structure with Fig. 1 and Fig. 2 is different.
Be provided with the auxiliary electrode 15 that links to each other with housing 26 short circuits in container center as seen from Figure 4.In addition as seen from Fig. 4, in container, be provided with two electrodes 8, following condition should be satisfied in the position of two electrode settings: be diameter with two interelectrode distances promptly, cross these two electrodes and with container be " circle " in the same center of circle, this " circle " is divided into inside and outside two parts with the cross section of container, and the area of a circle that is positioned at this " circle " should be slightly smaller than or equal this " circle " outer annulus area.High-frequency electric field that like this can guarantee effect liquid in treating apparatus is even haply.
When the present invention adopts the device that two treating apparatus of usefulness as shown in Figure 5 are composed in series, wherein be positioned at the used electric field frequency of the first order container handling of upstream and should certain difference be arranged with the used electric field frequency of the second level container handling that is positioned at the downstream, the effect of such its processing of device is best, and the difference on the frequency of the bi-level treatment container that test provides is preferably in 200KHz～1000KHz scope.
The height of container handling can be determined according to the requirement of using in the said apparatus, but it should be noted that used container height should become certain relation with the flow velocity that liquid flows through container handling, should be not less than for 1 second to guarantee the time that liquid flows through each container.
The high frequency electric source used about the present invention can constitute with corresponding power device, and the frequency that should guarantee simultaneously to make device is in 2000KHz～30000KHz scope, and the power of device can satisfy 0.2KVA～0.7KVA/100m
3H (liquid volume).
High-frequency energy generator used in the present invention is to combine with purchasing radio-frequency generator and the high frequency power amplifier that maybe can have made to order on the existing market.In the figure that the present invention provides, omitted the high-frequency energy generator.
The inventive method is that the high-frequency electromagnetic energy is fed in the chamber of solution-treated container by high frequency cable, and forms the electromagnetic field of high frequency therein, when flow of solution is activated under the effect in the electromagnetic field of high frequency during through the solution-treated chamber.Solution is under the effect of electromagnetic field of high frequency, hydrone association state in the solution is cracked, crack to little association body or single hydrone and make it to arrange relatively in order by original big association body water clusters, this variation of solution makes it also have institute's metal ion in the restriction solution when pardon is enhanced, and the ability of other newly-generated crystallite salt particle freedom of movement.It has not only improved the solvability to various salts, and the potential difference that can make original calcium in the solution, magnesium ion and newly-generated crystallite salt particle and wall interface reduces even disappears, in the regular hour, eliminated the condition of all kinds of salt particles crystallization on wall, even solution near or reach capacity, still can effectively prevent or slow down calcium, magnesium ion and newly-generated all kinds of crystallite salt particles in the adhering to of positions such as eluting column inwall, grid, draught fan impeller, trapping layer, form fouling and crystallization.
A reality of the present invention uses example to be, adopts structure as shown in Figure 5, and wherein the first order and second level container handling are connected, and all adopt the structure of bipolar electrode as shown in Figure 4, and the diameter of auxiliary electrode is 45 millimeters.
The main operational factor of device is: the operating frequency of an electrode of first order container is 2600KHz, and the operating frequency of another electrode is 3100KHz, and the operating frequency of two electrodes of second level container handling is respectively 3100KHz and 3600KHz; Consumed power of whole machine 〉=1KVA, per hour the quantity of treat liquid is 200m
3
Processing procedure is as follows:
After solution pump (19) will be deposited in drip washing in the liquid storage container (17) and at first pass through first order container handling (20) with solution by the passage of being made up of flange (18) and pipeline (25), enter second level container handling (22) again, import eluting column (23) again after making solution by the high-frequency electromagnetic field action in (20) and (22).By drip washing gas under the effect of air-introduced machine (29) through inlet (24) enter eluting column (23) after grid (27) and processed solution mixings drip washing through trapping layer (28) by exhaust outlet (30) discharge, fall bottom the eluting column (23) solution more by the road (21) return liquid storage container (17).
Fluorine-containing and the metal ion tail gas that said apparatus produces during Gansu factory is produced carries out drip washing, the fluorine ion that do not allow in the tail gas to discharge and other metal ion are neutralized and reclaims by drip washing, makes the tail gas qualified discharge.
This enterprise uses before the method and apparatus of the present invention, the calcium carbonate that system is in service to be needed every day add load quantity in solution, and only move 65-75 days, promptly on grid, trapping layer and the draught fan impeller of system, form thickness and reach tens of millimeters crystal, production can't normally be carried out, have to stop to produce, carry out the labor cleaning.The stop production to overhaul stage need arrange a large amount of personnel that the crystal that forms in the system is carried out the labor cleaning, needs stopping production 7-10 talent can finish cleaning work at every turn, has not only had a strong impact on the output of product, but also causes the energy, water resource and waste of manpower resource.Also can produce a large amount of acid-base waste fluids and environment is caused secondary pollution in cleaning process.Because draught fan impeller can make air-introduced machine lose dynamic balancing after producing crystal, not only can produce bigger noise in addition, and can damage in the short period of time air-introduced machine axle, watt or bearing, cause equipment to damage in early days.
After using aforesaid apparatus of the present invention, 30%～40% of consumption calcium carbonate before only need adding in per 3～4 days, operation found no crystallization deposition after 330 days on grid in system, the crystal that 5 millimeters of less thaies are only arranged on trapping layer, and the crystal that 3 millimeters of less thaies are only arranged on draught fan impeller.Cleaning cycle can prolong arrival more than 1 year.
Below clear up the comparison of situations such as crystal for the working condition before and after equipped this device, crystallization and processing:
Claims (9)
1, the method that stops the elution circuit crystal to produce is characterized in that drip washing liquid is passed through a high-frequency electric field earlier before entering elution device, with high-frequency electric field it is handled.
2, the method that produces according to the described prevention elution circuit of claim 1 crystal, the frequency that it is characterized in that high-frequency electric field is 2000KHz～30000KHz, power is 0.2KVA～0.7KVA/100m
3The time minimum that h, liquid handle in high-frequency electric field is 1 second.
3, the method for prevention elution circuit crystal generation according to claim 2, the frequency that it is characterized in that high-frequency electric field is 3000KHz～8000KHz, power is 0.3KVA～0.6KVA/100m
3H.
4, realize the device of the described method of claim 1 to 3, it is characterized in that in the container that has liquid input and output pipe, being provided with electrode, this electrode links to each other with the inner core of the output coaxial cable of high-frequency energy generator, and the shell of container links to each other with the outer shielding layer of radio-frequency generator output coaxial cable.
5, device according to claim 4 is characterized in that container is a circular cross-section, and its input pipe is located at the bottom of container, and its efferent duct is located at the top of container.
6,, it is characterized in that electrode is located at the container center position according to claim 4 or 5 described devices.
7, device according to claim 6, it is characterized in that in container, being provided with two electrodes, should to satisfy with two interelectrode distances be diameter in the position that is provided with of two electrodes, and the circle of crossing two electrodes is divided into two parts with the cross section of container, wherein be positioned at the inner area of this " circle " and should be equal to or slightly less than the outside annulus area of this " circle " substantially, the operating frequency of two electrodes should differ 300KHz～800KHz, be provided with an auxiliary electrode, auxiliary electrode and shell short circuit at the container cross section center.
8, device according to claim 7, the diameter that it is characterized in that electrode is 10～30 millimeters, the diameter of auxiliary electrode is 25～75 millimeters.
9, described according to Claim 8 device is characterized in that being made up of two containers that are in series, and the operating frequency range that wherein is in the container of upstream is 200KHz～1000KHz with the operating frequency difference that is in the container in downstream.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100427017A CN100484609C (en) | 2006-04-15 | 2006-04-15 | Method and apparatus for inhibiting crystallisate production of acidic contamination in gas by wet method leaching |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100427017A CN100484609C (en) | 2006-04-15 | 2006-04-15 | Method and apparatus for inhibiting crystallisate production of acidic contamination in gas by wet method leaching |
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| Publication Number | Publication Date |
|---|---|
| CN1864816A true CN1864816A (en) | 2006-11-22 |
| CN100484609C CN100484609C (en) | 2009-05-06 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2006100427017A Active CN100484609C (en) | 2006-04-15 | 2006-04-15 | Method and apparatus for inhibiting crystallisate production of acidic contamination in gas by wet method leaching |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108264181A (en) * | 2018-01-12 | 2018-07-10 | 佛山市伊清环保工程技术有限公司 | A kind of equipment for preventing desulfurated circulating water saturated crystallization |
-
2006
- 2006-04-15 CN CNB2006100427017A patent/CN100484609C/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108264181A (en) * | 2018-01-12 | 2018-07-10 | 佛山市伊清环保工程技术有限公司 | A kind of equipment for preventing desulfurated circulating water saturated crystallization |
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| Publication number | Publication date |
|---|---|
| CN100484609C (en) | 2009-05-06 |
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