CN102861495B - Dust removal device and dust removal method for high-temperature flue gas - Google Patents
Dust removal device and dust removal method for high-temperature flue gas Download PDFInfo
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- CN102861495B CN102861495B CN201210367412.XA CN201210367412A CN102861495B CN 102861495 B CN102861495 B CN 102861495B CN 201210367412 A CN201210367412 A CN 201210367412A CN 102861495 B CN102861495 B CN 102861495B
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Abstract
The invention provides a dust removal device and a dust removal method for high-temperature flue gas. The dust removal device comprises a first dust removal system and a second dust removal system; the first dust removal system comprises a first barrel, a flue gas inlet, a flue gas outlet and a cooling water component, the flue gas inlet and the flue gas outlet are communicated with the inside of the first barrel, and the cooling water component encircles the first barrel and cools down the first barrel; and the second dust removal system comprises a second barrel, an engine-oil dust removal component, a flue gas inlet and a flue gas outlet, the engine-oil dust removal component is arranged in the second barrel and consists of a base and engine oil attached on the surface of the base, the flue gas inlet is arranged on the lower side of the base, the flue gas outlet is arranged on the upper side of the base, and the flue gas outlet of the first dust removal system is communicated with the flue gas inlet of the second dust removal system. The dust removal method includes cooling the flue gas and removing dust from the flue gas by gravity simultaneously; removing dust by the engine oil; and feeding the flue gas of which the dust is removed by the engine oil into a vacuum system. Power of the flue gas is supplied by the vacuum system. By the dust removal device, the temperature of the flue gas is reduced, the dust removal engine oil is prevented from being carbonized, and the dust removal efficiency is greatly improved.
Description
Technical field
The present invention relates to the technical field to being provided the high-temperature gas of power to carry out dedusting by vacuum system, more particularly, the high-temperature gas related in a kind of titanium sponge distillation electric furnace inner chamber to being extracted out by vacuum system carries out the apparatus and method of dedusting.
Background technology
When utilizing magnesium reduction process to produce titanium sponge, in order to shorten distillation time, reduce distillation energy consumption, adopt the method for vacuum distillation in production, simultaneously for avoiding retort to cause retort to be out of shape because inside and outside differential pressure is excessive, process to be vacuumized to furnace chamber inside in production, be called anti-vacuumizing.Owing to there being more tiny fire resisting material particle in retort, so can be mixed with fire resisting material particle in retort flue gas, these solid particles are very big to the destruction of vavuum pump, and easy influential system vacuum, therefore, before entering vavuum pump, dust removal operation to be carried out to flue gas.
At present, adopt and arrange the cylinder that a bottom is vertebra shape on vacuum pipe, arrange sieve plate between centrum and cylinder in most titanium sponge production process, cylindrical tube, built with the steel wire coil that adhering to machine oil, utilizes the suction-operated removing flue dust of machine oil.In use find, this device has very large defect, first smoke gas temperature higher (700 ~ 900 DEG C), directly carry out the carbonization that dust removal operation very easily causes machine oil, not only can not adsorb grit, the carbon granules after causing carbonization on the contrary enters vavuum pump, pollutes pump oil, reduce its lubricating function, larger damage is caused to vavuum pump.
Summary of the invention
The object of the invention is to overcome the deficiencies in the prior art, and provide one can reduce flue-gas temperature, improve the dust arrester of flue gas ash removal effect.
To achieve these goals, one aspect of the present invention provides a kind of dust arrester of high-temperature flue gas, described dust arrester comprises the first dust pelletizing system and the second dust pelletizing system, wherein, described first dust pelletizing system comprises: the first cylindrical shell, the smoke inlet be communicated with described first inner barrel and exhanst gas outlet, and arrange around the first cylindrical shell, with the cooling water component of lowering the temperature to the first cylindrical shell; Described second dust pelletizing system comprises: the second cylindrical shell, be arranged on the machine oil dedusting component be made up of with the machine oil being attached to matrix surface matrix in described second cylindrical shell, and be arranged on smoke inlet below described matrix and be arranged on the exhanst gas outlet above described matrix, the exhanst gas outlet of described first dust pelletizing system is communicated with the smoke inlet of described second dust pelletizing system.
According to an embodiment of high temperature fume dust removal device of the present invention, described cooling water component comprises the water-cooling system shell be set on described first cylindrical shell, and in the seal cavity being placed between described water-cooling system shell and described first cylindrical shell and around the cooling coil of described first cylindrical shell, wherein, one end of described cooling coil is communicated with the water inlet being arranged on described water-cooling system shell upper end, the other end is communicated with the delivery port being arranged on described water-cooling system shell lower end, at described cooling coil, the side of described first cylindrical shell is provided with multiple water spray aperture.
According to an embodiment of high temperature fume dust removal device of the present invention, described cooling coil is fixed on described water-cooling system shell, and described cooling coil distributes in the shape of a spiral around described first cylindrical shell.
According to an embodiment of high temperature fume dust removal device of the present invention, described second dust pelletizing system also comprises sieve plate, cover plate and to be arranged between described cover plate and sieve plate and as the steel wire coil of matrix, wherein, described sieve plate to be arranged in described second cylindrical shell and between the smoke inlet and described machine oil dedusting component of the second dust pelletizing system, described cover plate to be arranged in described second cylindrical shell and between described machine oil dedusting component and the exhanst gas outlet of the second dust pelletizing system, described cover plate and described sieve plate to be provided with multiple aperture.
According to an embodiment of high temperature fume dust removal device of the present invention, described first dust pelletizing system also comprises and being fixed in described first cylindrical shell with the dividing plate of the time of staying of prolong smoke in described first dust pelletizing system, described dividing plate is arranged along the short transverse of described first dust pelletizing system, and the inner space of described first dust pelletizing system is divided into left part, right part and is positioned at the bottom be communicated with right part below described dividing plate and by left part.
According to an embodiment of high temperature fume dust removal device of the present invention, described first dust pelletizing system also comprises the baffle plate be fixed in described bottom, described baffle plate is positioned at the below of described right part, and described baffle plate and described dividing plate are 110 ° ~ 130 ° and leave exhaust gases passes between described baffle plate and described dividing plate.
According to an embodiment of high temperature fume dust removal device of the present invention, described dust arrester also comprises the dust-exhausting port being arranged on described first cylinder body bottom and the sewage draining exit being arranged on described second cylinder body bottom.
According to an embodiment of high temperature fume dust removal device of the present invention, described dust arrester also comprises the control valve on multiple smoke inlet being separately positioned on described first dust pelletizing system, on exhanst gas outlet, on delivery port, on dust-exhausting port and on the exhanst gas outlet of described second dust pelletizing system.
The present invention provides a kind of dust collection method of high-temperature flue gas on the other hand, and described dust collection method comprises the following steps of carrying out successively: lower the temperature and gravitational dust collection to flue gas simultaneously; Machine oil dedusting is carried out to flue gas; Flue gas after machine oil dedusting enters vacuum system, and the power of flue gas is provided by vacuum system.
According to an embodiment of high temperature fume dust removal method of the present invention, described dust collection method adopts the dust arrester described in above-mentioned any one to process high-temperature flue gas.
Compared with prior art, it is simple, applicable that the beneficial effect that the present invention has comprises structure, is convenient to cleaning; Reduce flue-gas temperature, avoid the carbonization of dedusting machine oil; Greatly improve efficiency of dust collection.
Accompanying drawing explanation
Fig. 1 shows the schematic diagram of high temperature fume dust removal device according to an exemplary embodiment of the present invention.
Fig. 2 shows the schematic diagram that high temperature fume dust removal device is according to an exemplary embodiment of the present invention connected with vacuum distillation plant.
10-first dust pelletizing system, 11-first cylindrical shell, the smoke inlet of 12-first dust pelletizing system, the exhanst gas outlet of 13-first dust pelletizing system, 14-water-cooling system shell, 15-cooling coil, 16-water inlet, 17-delivery port, 18-dividing plate, 19-baffle plate, 110-dust-exhausting port, 111-gathers dust groove, 20-second dust pelletizing system, 21-second cylindrical shell, 22-sieve plate, 23-cover plate, 24-steel wire coil, the smoke inlet of 25-second dust pelletizing system, the exhanst gas outlet of 26-second dust pelletizing system, 27-top cover, 28-sewage draining exit, 100-distills electric furnace.
Detailed description of the invention
Describe in detail with exemplary embodiment below with reference to accompanying drawings according to high temperature fume dust removal device and method of the present invention.
Fig. 1 is the schematic diagram of high temperature fume dust removal device according to an exemplary embodiment of the present invention.Fig. 2 is the schematic diagram that is connected of high temperature fume dust removal device and vacuum distillation plant (such as, titanium sponge distillation electric furnace, referred to as distillation electric furnace) according to an exemplary embodiment of the present invention.As shown in Figure 1, the high temperature fume dust removal device of this exemplary embodiment comprises the first dust pelletizing system 10 and the second dust pelletizing system 20.
Described first dust pelletizing system comprises: columniform first cylindrical shell 11, with described first cylindrical shell 11 smoke inlet 12 that is communicated with of inside and exhanst gas outlet 13, and around the first cylindrical shell 11 setting with the cooling water component of lowering the temperature to the first cylindrical shell 11.Wherein, described cooling water component can comprise the water-cooling system shell 14 be set on described first cylindrical shell 11, and in the seal cavity being placed between described water-cooling system shell 14 and described first cylindrical shell 11 and around the cooling coil 15 of described first cylindrical shell 11, one end of described cooling coil 15 is communicated with the water inlet 16 being arranged on described water-cooling system shell 14 upper end, general employing Flange joint, the other end is communicated with the delivery port 17 being arranged on described water-cooling system shell 14 lower end, for convenience of cleaning, the described other end can be set to blind pipe, at described cooling coil 15, the side of described first cylindrical shell 11 is provided with multiple water spray aperture, cooling water is evenly sprayed onto on described first cylindrical shell 11, in addition, in order to make described cooling coil 15 more stable in water spray process, by fixtures such as snap closes, described cooling coil 15 can be fixed on the internal face of described water-cooling system shell 14.
Preferably, described cooling coil 15 distributes in the shape of a spiral around described first cylindrical shell 11, adopt spiral helicine cooling coil 15 can increase its effective length around described first cylindrical shell 11, and can carry out the high-temperature flue gas in the first cylindrical shell 11 cooling comprehensively, uniformly, make cooling effect better.But person of ordinary skill in the field can understand, for realizing the cooling effect of the first dust pelletizing system 10 pairs of high-temperature flue gas, cooling coil 15 is not limited to spiral helicine distribution mode, as long as cooling coil 15 can cool around described first cylindrical shell 11 to it.
In order to the time of staying of prolong smoke in the first dust pelletizing system 10, to obtain better cooling and dust removing effects, described first dust pelletizing system can also comprise and being fixed in described first cylindrical shell 11 with the dividing plate 18 of the time of staying of prolong smoke in described first dust pelletizing system 10, conveniently clear up, described dividing plate 18 is arranged along the short transverse of described first dust pelletizing system 10, and the inner space of described first dust pelletizing system 10 is divided into left part, right part and is positioned at the bottom be communicated with right part below described dividing plate 18 and by left part; In addition, in order to reduce velocity of flue gas further, avoid that velocity of flue gas is too fast enters the second dust pelletizing system 20, retain a part of grit simultaneously, can also one piece of baffle plate 19 be set in described bottom, described baffle plate 5 is positioned at the below of described right part, and described baffle plate 19 and described dividing plate 18 are 110 ° ~ 130 ° and leave exhaust gases passes between described baffle plate 19 and described dividing plate 18; Usually, described dividing plate 18 and baffle plate 19 are fixed in described first cylindrical shell 11 with welding manner, but do not get rid of and can also other modes be fixed on the first cylindrical shell 11, even described dividing plate 18 and baffle plate 19 can be made integral piece with described first cylindrical shell 11; Be provided with in dividing plate 18 situation, described smoke inlet 12 and exhanst gas outlet 13 be arranged on the upper end of described first cylindrical shell 11, the time of staying of high-temperature flue gas in the first cylindrical shell 11 can extended, be conducive to the sedimentation of grit in the cooling of flue gas and flue gas.In the present embodiment, described baffle plate 19 and described dividing plate 18 are the steel plate of thickness 10 ~ 40mm.
Described second dust pelletizing system 20 comprises the second cylindrical shell 21, be arranged on the machine oil dedusting component be made up of matrix and the machine oil that is attached to matrix surface in described second cylindrical shell 21, and the smoke inlet 25 be arranged on below described matrix and the exhanst gas outlet 26 be arranged on above described matrix; The exhanst gas outlet 13 of described first dust pelletizing system 10 passes through pipeline communication with the smoke inlet 25 of described second dust pelletizing system 20; Wherein, smoke inlet 25 carries out second time dedusting for being passed in the second dust pelletizing system 20 by the flue gas after the first dust pelletizing system 10 lowers the temperature dedusting, second time dedusting mainly adopts the oily substance that the viscosity such as machine oil are larger to carry out dedusting, and the fine grit namely adsorbed in flue gas by the oily substance that the viscosity such as machine oil are larger reaches dust removing effects; Described second dust pelletizing system 20 can also comprise sieve plate 22, cover plate 23 and be arranged between described cover plate 23 and sieve plate 22 and as the steel wire coil 24 of matrix and forms, wherein, described sieve plate 22 to be arranged in described second cylindrical shell 21 and between the smoke inlet 25 and described machine oil dedusting component of the second dust pelletizing system 20, cover plate 23 to be arranged in described second cylindrical shell 21 and between described machine oil dedusting component and the exhanst gas outlet 26 of the second dust pelletizing system 20, described cover plate 23 and described sieve plate 22 to be provided with multiple aperture; In the present embodiment, described sieve plate 22 and described cover plate 23 are the circular steel plate of thickness 10 ~ 20mm, and on circular steel plate, be provided with the circular hole of multiple 4 ~ 5mm.
Conveniently change machine oil, top cover 27 can be set at described second cylindrical shell 21 top, like this, in dust removal process, steel wire coil 24 can be taken out by top cover 27 in time according to the dust situation that machine oil adsorbs.
During assembling, first sieve plate 22 is arranged on the bottom in the second cylindrical shell 21, for convenience of the installation and removal of sieve plate 22, in the bottom of the second cylindrical shell 21 internal face, multiple positioning convex can be installed, then the steel wire coil 24 after being soaked by the oily substance larger through viscosity such as machine oil is placed on sieve plate 22, then cover plate 23 is covered, in order to prevent in dust removal process, steel wire coil 24 is out of shape and affects absorption dust removing effects, usually the fixtures such as snap close are adopted to be fixed on sieve plate 22 and cover plate 23, finally, by fixtures such as bolts, top cover 27 is arranged on the top of described second cylindrical shell 21, for preventing flue gas from the joint gap between top cover 27 and the second cylindrical shell 21 to outward leakage further, encapsulation process can be done between described second cylindrical shell 21 and described top cover 27.
High temperature fume dust removal device for above-mentioned exemplary embodiment can also make following improvement:
Conveniently blowdown, described dust arrester also comprises the dust-exhausting port 110 be arranged on bottom described first cylindrical shell 11 and the sewage draining exit 28 being arranged on described second cylinder body bottom, wherein, the bottom of the first cylindrical shell 11 of the first dust pelletizing system 10 is set to turbination, and in the bottom of described first cylindrical shell 11, the groove 111 that gathers dust is installed, so that the flue dust removed in collection flue gas, avoid flue dust directly to enter in air and pollute.
Described dust arrester can also comprise the control valve on multiple smoke inlet 12 be separately positioned in described first dust pelletizing system 10, on exhanst gas outlet 13, on delivery port 17, on dust-exhausting port 110 and on the exhanst gas outlet 26 of described second dust pelletizing system 20, for the flow of the flow and cooling water that control flue gas, such as, at delivery port 17, place arranges pressure sensitive valve, to control the Coolant-Level in the seal cavity between described water-cooling system shell 14 and described first cylindrical shell 11; Arranging valve at exhanst gas outlet 26 place is conveniently overhaul, and certainly, in order to ensure the vacuum of dust pelletizing system, at exhanst gas outlet 26, place also can not arrange valve.
Another aspect of the present invention, provides a kind of dust collection method of high-temperature flue gas, and described dust collection method comprises the following steps of carrying out successively: lower the temperature and gravitational dust collection to flue gas simultaneously; Machine oil dedusting is carried out to flue gas; Flue gas after machine oil dedusting enters vacuum system, and the power of flue gas is provided by vacuum system.Described dust collection method can adopt above-mentioned dust arrester to process high-temperature flue gas.
According to one exemplary embodiment of the present invention, as shown in Figure 1 and Figure 2, in the anti-vacuum system use procedure of titanium sponge distillation electric furnace, before high-temperature flue gas enters vavuum pump (not shown), what first adopt high temperature fume dust removal device according to an exemplary embodiment of the present invention carries out dedusting, and described dust collection method comprises:
(1) first enter the first dust pelletizing system 10 (coiled water-cooling dust system) from distillation electric furnace 100 dust-laden high-temperature flue gas out, through the cooling effect of the water that cooling coil 15 sprays, and pass through the effect of dividing plate 18 and baffle plate 19, reduce flow velocity and the temperature of flue gas, and retain the flue dust of a part.
(2) flue gas after the first dust pelletizing system 10 processes enters in the second cylindrical shell 21 from the smoke inlet 25 of the second dust pelletizing system 20 (fine grit absorption dust pelletizing system) below, by on steel wire coil 24 adhere to machine oil under the suction-operated of flue dust, carry out second time dedusting.
In dust removal process, can supplement according to the condition of production machine oil changed on steel wire coil timely, and get rid of flue dust and discarded machine oil by outlet 110 and sewage draining exit 28.
The high temperature fume dust removal device of exemplary embodiment of the present is before carrying out machine oil absorption dedusting, namely before entering the second dust pelletizing system 20, first cooling process is carried out to flue gas, avoid and that cause machine oil carbonization too high due to temperature, extend machine oil service life, the more important thing is, the flue gas after dedusting enters vacuum system, avoid the infringement of carbonization grit to vavuum pump, the rate of breakdown of vacuum system is reduced greatly.In addition, in the first dust pelletizing system 10, by arranging baffle plate 19 and dividing plate 18, extend the time of staying of flue gas in the first dust pelletizing system 10, enhance cooling effect, there is good dust removing effects simultaneously, decrease the dedusting pressure of second time dedusting, make the dust removing effects of whole dust arrester better, and, the dividing plate 18 that flue dust is arranged along the short transverse of the first dust arrester 10 directly falls into the groove 111 that gathers dust, and easily clears up, and the baffle plate 19 arranged in the bottom of the first dust arrester 10 further enhances dust removing effects.Can find out, high temperature fume dust removal device of the present invention is applicable to the cooling dust removal process of distilling electric furnace flue gas in titanium sponge production, and achieves good dust removing effects, but the present invention is not limited thereto, and the present invention is widely used in the dust removal process of various high-temperature flue gas.
In sum, high temperature fume dust removal device tool of the present invention has the following advantages: (1) structure is simple, applicable, is convenient to cleaning; (2) reduce flue-gas temperature, avoid the carbonization of dedusting machine oil; (3) there is good dust removing effects.
Claims (8)
1. a dust arrester for high-temperature flue gas, is characterized in that, described dust arrester comprises the first dust pelletizing system and the second dust pelletizing system, wherein,
Described first dust pelletizing system comprises: the first cylindrical shell, the smoke inlet be communicated with described first inner barrel and exhanst gas outlet, and arranges around the first cylindrical shell, with the cooling water component of lowering the temperature to the first cylindrical shell;
Described second dust pelletizing system comprises: the second cylindrical shell, be arranged on the machine oil dedusting component be made up of with the machine oil being attached to matrix surface matrix in described second cylindrical shell, and be arranged on smoke inlet below described matrix and be arranged on the exhanst gas outlet above described matrix, smoke inlet and the titanium sponge of described first dust pelletizing system distill electric furnace and are communicated with, the exhanst gas outlet of described first dust pelletizing system is communicated with the smoke inlet of described second dust pelletizing system, and the exhanst gas outlet of described second dust pelletizing system is communicated with vacuum system;
Described first dust pelletizing system also comprises and being fixed in described first cylindrical shell with the dividing plate of the time of staying of prolong smoke in described first dust pelletizing system, described dividing plate is arranged along the short transverse of described first dust pelletizing system, and the inner space of described first dust pelletizing system is divided into left part, right part and is positioned at the bottom be communicated with right part below described dividing plate and by left part.
2. dust arrester according to claim 1, it is characterized in that, described cooling water component comprises the water-cooling system shell be set on described first cylindrical shell, and in the seal cavity being placed between described water-cooling system shell and described first cylindrical shell and around the cooling coil of described first cylindrical shell, wherein, one end of described cooling coil is communicated with the water inlet being arranged on described water-cooling system shell upper end, the other end is communicated with the delivery port being arranged on described water-cooling system shell lower end, at described cooling coil, the side of described first cylindrical shell is provided with multiple water spray aperture.
3. dust arrester according to claim 2, is characterized in that, described cooling coil is fixed on described water-cooling system shell, and described cooling coil distributes in the shape of a spiral around described first cylindrical shell.
4. dust arrester according to claim 1, it is characterized in that, described second dust pelletizing system also comprises sieve plate, cover plate and to be arranged between described cover plate and sieve plate and as the steel wire coil of matrix, wherein, described sieve plate to be arranged in described second cylindrical shell and between the smoke inlet and described machine oil dedusting component of the second dust pelletizing system, described cover plate to be arranged in described second cylindrical shell and between described machine oil dedusting component and the exhanst gas outlet of the second dust pelletizing system, described cover plate and described sieve plate to be provided with multiple aperture.
5. dust arrester according to claim 1, it is characterized in that, described first dust pelletizing system also comprises the baffle plate be fixed in described bottom, described baffle plate is positioned at the below of described right part, and described baffle plate and described dividing plate are 110 ° ~ 130 ° and leave exhaust gases passes between described baffle plate and described dividing plate.
6. dust arrester according to claim 1, is characterized in that, described dust arrester also comprises the dust-exhausting port being arranged on described first cylinder body bottom and the sewage draining exit being arranged on described second cylinder body bottom.
7. dust arrester according to claim 6, it is characterized in that, described dust arrester also comprises the control valve on multiple smoke inlet being separately positioned on described first dust pelletizing system, on exhanst gas outlet, on delivery port, on dust-exhausting port and on the exhanst gas outlet of described second dust pelletizing system.
8. a dust collection method for high-temperature flue gas, is characterized in that, the high-temperature flue gas that described dust collection method is used for titanium sponge distillation electric furnace is discharged processes, and comprises the following steps of carrying out successively:
Flue gas is lowered the temperature and gravitational dust collection simultaneously;
Machine oil dedusting is carried out to flue gas;
Flue gas after machine oil dedusting enters vacuum system, and the power of flue gas is provided by vacuum system, and described dust collection method adopts the dust arrester according to any one of claim 1 to 7 to process high-temperature flue gas.
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| CN104307293B (en) * | 2014-11-07 | 2016-05-04 | 广西南宁华国环境科技有限公司 | A kind of water curtain combination dust arrester |
| CN106621672B (en) * | 2017-01-17 | 2018-12-11 | 哈尔滨工业大学 | A kind of magnetic control high-temperature gas segmented couples dust removal method |
| CN110180298A (en) * | 2019-05-14 | 2019-08-30 | 淄博棠鸣机电科技有限公司 | A kind of exhaust processor with cooling function |
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| CN102287841A (en) * | 2011-06-26 | 2011-12-21 | 华北电力大学（保定） | Method for smoke discharge, condensation and dust removal of supercharged oxygen-enriched coal-fired boiler |
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| CN201439045U (en) * | 2009-10-30 | 2010-04-21 | 朝阳百盛锆钛股份有限公司 | Vacuum pipeline dust filtering device in production of sponge titanium |
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