CN102061349A - Alkali-spraying dechlorination device for blast-furnace gas - Google Patents
Alkali-spraying dechlorination device for blast-furnace gas Download PDFInfo
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- CN102061349A CN102061349A CN 201010548287 CN201010548287A CN102061349A CN 102061349 A CN102061349 A CN 102061349A CN 201010548287 CN201010548287 CN 201010548287 CN 201010548287 A CN201010548287 A CN 201010548287A CN 102061349 A CN102061349 A CN 102061349A
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- spray
- alkali
- furnace gas
- blast furnace
- dechlorination device
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Abstract
The invention provides an alkali-spraying dechlorination device for a blast-furnace gas. The alkali-spraying dechlorination device is composed of an alkali-spraying tower and a rotational flow plate dehydrator arranged in a gas outlet pipeline of the alkali-spraying tower, wherein the alkali-spraying tower comprises a vertically arranged barrel; the lower end of the barrel is communicated with a cone hopper; the side wall of the lower part of the barrel is provided with a gas inlet; the bottom of the cone hopper is provided with a water discharging device; the top of the barrel is provided with a gas outlet; the gas outlet is connected with the gas outlet pipeline; and a first water injector, an alkali-spraying device and a filler dehydration device are sequentially arranged on the inner side of the barrel, above the inlet, from bottom to top in a spaced manner. By using the alkali-spraying dechlorination device for the blast-furnace gas, acidic medium and a large amount of mechanical water in the blast-furnace gas can be effectively removed, the pH value of condensate water in the blast-furnace gas is controlled to be 7-8, the content of the mechanical water in the gas is less than 7g/Nm<3>, so that the corrosion of gas pipelines, a compensator and successive processing equipment can be avoided, thereby prolonging the service lives of delivery facilities and equipment of the blast-furnace gas.
Description
Technical field
The invention relates to a kind of corollary apparatus of blast furnace gas fully-dried type dust-removal system, relate in particular to a kind of blast furnace gas spray alkali dechlorination device that is used for handling a large amount of acidic mediums of full-dry type blast furnace coal gas and mechanical water.
Background technology
Acidic medium is on the high side in the domestic blast furnace gas, and its major cause is following to be: (1) steel mill is for reducing coke ratio, all blowing bituminous coal or hard coal to some extent, thereby sulfur-bearing is that inevitably element sulphur produces SO through high-temperature chemical reaction in the coal powder injection in the coal gas
2, SO
3Deng, therefore, must contain SO in the water of condensation in the coal gas
3 2-, SO
4 2-(2) steel mill more or less adopts part imported raw material ore deposit, and its ore-dressing technique adopts seawater or spray seawater in the process of sea-freight, and a large amount of sulfate radicals and chlorion enter into iron-smelting raw material in the seawater; Adopt chloride auxiliary agent (CaCl with agglomerate when (3) smelting iron
2Deng), thereby contain a large amount of Cl in the blast furnace gas
-Corrosivess such as ion are dissolved in and form strongly acidic solution behind the gas condensed water and formed galvanic cell.
Dedusting of blast furnace gas all adopted wet processing in the past, and a large amount of spray waters can clean the acidic medium in the coal gas, and the pH value of water of condensation is neutral substantially in the follow-up purified gas, and is not strong to pipeline and equipment corrosion.In recent years, iron and steel enterprise's blast furnace gas fully-dried type dust settling pocket technique has obtained promoting on a large scale, but because after not considering that coal gas adopts dry method dust, the a large amount of enrichments of acidic medium meeting in the coal gas, cause a series of problems such as low temperature purified gas pipeline, loop expansion pipe and subsequent technique equipment corrosion, and shortened the life-span that facilities and equipment were carried and used to blast furnace gas.So, when using the blast furnace gas all dry dedusting technology, how to remove the acidic medium in the coal gas effectively, thereby the etching problem that solves pipeline and equipment is very to pay close attention in the industry and problem demanding prompt solution.
In view of this, the inventor relies on relevant design and manufacturing experience for many years, proposes a kind of blast furnace gas spray alkali dechlorination device, to overcome the defective of prior art.
Summary of the invention
The object of the present invention is to provide a kind of blast furnace gas spray alkali dechlorination device, can remove acidic medium and a large amount of mechanical water in the blast furnace gas effectively, avoid or reduce gas line, loop expansion pipe and subsequent technique equipment being corroded, thereby improve the life-span that blast furnace gas is carried facilities and equipment.
The object of the present invention is achieved like this, a kind of blast furnace gas spray alkali dechlorination device, and this spray alkali dechlorination device is made of spray washing tower (for removing CO2) and the eddy flow plate water trap that is arranged in the spray washing tower (for removing CO2) outlet pipe; Described spray washing tower (for removing CO2) includes a cylindrical shell that vertically is provided with, this cylindrical shell lower end is communicated with an awl bucket, and the sidewall of described cylindrical shell bottom is provided with inlet mouth, and described awl bucket bottom is provided with water-freeing arrangement, the top of described cylindrical shell is provided with the air outlet, and this air outlet connects described outlet pipe; Be positioned at the inlet mouth upside in described inner barrel and be interval with first waterworks, spray alkali device and filler dewatering unit from bottom to top in regular turn.
In a better embodiment of the present invention, between described first waterworks and spray alkali device, also be provided with second waterworks.
In a better embodiment of the present invention, above described filler dewatering unit, also be provided with the filler flushing arrangement.
In a better embodiment of the present invention, described filler flushing arrangement is made of annular spray gun.
In a better embodiment of the present invention, described first waterworks, second waterworks and spray alkali device are made of a plurality of spray guns around cylinder lateral wall respectively, and described each spray gun is run through sidewall and pointed to the setting of cylindrical shell center by the cylindrical shell outside.
In a better embodiment of the present invention, described spray gun comprises that head extends near a plurality of short spray gun of inwall and head extends near a plurality of long spray gun in cylindrical shell center.
In a better embodiment of the present invention, described a plurality of short spray guns and a plurality of long spray gun are respectively around the barrel uniform distribution.
In a better embodiment of the present invention, described spray gun is provided with a plurality of nozzles downwards.
In a better embodiment of the present invention, on described outlet pipe and the position of closing on the air outlet be provided with and diffuse valve.
In a better embodiment of the present invention, below described spray washing tower (for removing CO2), be provided with the pond.
From the above mentioned, blast furnace gas spray alkali dechlorination device of the present invention has cooperated domestic big-and-middle-sized blast furnace gas dry dusting technical development required, acidic medium in the energy effective elimination blast furnace gas and a large amount of mechanical waters, make that the PH of water of condensation is controlled at 7～8 in the blast furnace gas, mechanical water content is less than 7g/Nm in the coal gas
3, avoid or reduced gas line, loop expansion pipe and subsequent technique equipment being corroded, thereby improved the life-span that blast furnace gas is carried facilities and equipment, satisfied user's service requirements.
Description of drawings
The following drawings only is intended to the present invention done and schematically illustrates and explain, not delimit the scope of the invention.Wherein,
Fig. 1: the structural representation of blast furnace gas spray alkali dechlorination device of the present invention.
Fig. 2: A-A dissects structural representation among Fig. 1.
Embodiment
Understand for technical characterictic of the present invention, purpose and effect being had more clearly, now contrast description of drawings the specific embodiment of the present invention.
As shown in Figure 1 and Figure 2, the invention provides a kind of blast furnace gas spray alkali dechlorination device 100, this spray alkali dechlorination device 100 is made of spray washing tower (for removing CO2) 1 and the eddy flow plate water trap 2 that is arranged in spray washing tower (for removing CO2) 1 outlet pipe 16; Described spray washing tower (for removing CO2) 1 includes a cylindrical shell 11 that vertically is provided with, these cylindrical shell 11 lower ends are communicated with an awl bucket 12, the sidewall of described cylindrical shell 11 bottoms is provided with inlet mouth 13, described awl 12 bottoms of struggling against are provided with water-freeing arrangement 14, the top of described cylindrical shell 11 is provided with air outlet 15, and this air outlet 15 connects described outlet pipe 16; Be positioned at inlet mouth 13 upsides in described cylindrical shell 11 inside and be interval with first waterworks 3, spray alkali device 5 and filler dewatering unit 6 from bottom to top in regular turn, this filler dewatering unit 6 is a garland filler water trap.
The use of described blast furnace gas spray alkali dechlorination device 100 is, enter in the cylindrical shell 11 and sail against the current from spray washing tower (for removing CO2) 1 inlet mouth 13 through the blast furnace gas after the dry gas cleaning, through first waterworks 3 coal gas is reduced to coal gas wet-bulb temperature below 72 ℃ from approaching about 100 ℃, thus, with abundant reduction temperature of gas, make the moisture content in the coal gas be in state of saturation; Spray alkaline purification by 5 pairs of coal gas of spray alkali device afterwards,, remove the acidic medium (chlorion and part of sulfuric acid radical ion) in the coal gas quickly and efficiently to reach the acid-base neutralisation effect.Because, in this blast furnace gas spray alkali dechlorination device, described spray alkali device 5 is arranged on first waterworks, 3 tops, be in higher position, can make coal gas upwards with alkali lye contacting of long period arranged in the process of flowing, therefore, can improve the effect (can be controlled at 7～8) of acid-base neutralisation through the water of condensation pH value behind this device acid-base neutralisation.For guaranteeing the effect of spray alkali, high alkali liquid needs to carry out mixing match with soft water.(reach 50g/Nm through mechanical water content is higher in the coal gas behind water spray and the spray alkali
3), need carry out processed to coal gas, at this moment, coal gas is from the bottom up by filler dewatering unit 6, little water droplet in the coal gas through the garland filler after, pool macrobead and utilize gravity principle to carry out preliminary hydro-extraction, can make that mechanical water content is reduced to 20～30g/Nm in the coal gas
3At last, coal gas flows out this spray alkali dechlorination device by the eddy flow plate water trap in the outlet pipe 16 2.Coal gas is when passing through the eddy flow plate of eddy flow plate water trap 2 inside, high-speed rotational with the centrifugal eddy flow of small-particle water droplet to the water trap inwall, get final product by the discharge of discharge structure (not shown) again, spray the content of effusive its mechanical water of blast furnace gas of alkali dechlorination device less than 7g/Nm3 by this blast furnace gas.Eddy flow plate water trap 2 can not only efficiently remove the mechanical water in the coal gas, can fully reduce to take up room simultaneously; Described eddy flow plate water trap 2 can horizontally be installed (as shown in Figure 1), also can vertically install, and is very convenient.
Further, as shown in Figure 1, in the present embodiment, between described first waterworks 3 and spray alkali device 5, also be provided with second waterworks 4.During normal operating conditions, second waterworks 4 is in closing condition, it uses as standby or accidental state, when gas temperature during at 100～150 ℃, second waterworks 4 just starts, with abundant reduction temperature of gas, and structure like this, the water yield that this device can be fully come the hierarchical control spray according to the inlet gas temperature reaches the effect of water saving.
As shown in Figure 1, in the present embodiment, above described filler dewatering unit 6, also be provided with filler flushing arrangement 7.After long-time use of this blast furnace gas spray alkali dechlorination device, the 6 easy foulings of filler dewatering unit are stopped up, and cause the system pressure loss excessive, need regularly carry out spray irrigation with high pressure water to filler dewatering unit 6 by filler flushing arrangement 7.Described filler flushing arrangement 7 is made of an annular spray gun (or toroidal nozzle).
As shown in Figure 1, described first waterworks 3, second waterworks 4 and spray alkali device 5 are made of a plurality of spray guns around cylindrical shell 11 sidewalls respectively.
For guaranteeing the water spray effect and the area coverage of spray gun in described three layers of jet apparatus, make spray washing tower (for removing CO2) cross section not stay the dead angle, in every layer of jet apparatus spray gun arrange all adopt some long spray guns in intracardiacly be periphery that putting is periphery outside with some short spray guns puts.With first waterworks 3 is the example explanation, and as shown in Figure 1 and Figure 2, described first waterworks, 3 each spray gun 31 run through sidewall by cylindrical shell 11 outsides and point to the setting of cylindrical shell 11 centers.Described spray gun 31 comprises that head extends near a plurality of short spray gun of inwall and head extends near a plurality of long spray gun in cylindrical shell center.Described a plurality of short spray gun and a plurality of long spray gun are respectively around the barrel uniform distribution.Described spray gun 31 is provided with a plurality of nozzles 311 downwards.
In the present embodiment, described water-freeing arrangement 14 is made of a connecting pipe.Further, coal gas is scurried out from the water-freeing arrangement 14 of spray washing tower (for removing CO2) bottom when preventing high pressure, security incident occurs, on described outlet pipe 16 and the position of closing on air outlet 15 be provided with and diffuse valve 8; When gas pressure is too high, diffuse valve 8 and open automatically and diffuse, during standard atmosphere pressure, diffuse 8 on valve and be in closing condition.
In the present embodiment, described spray washing tower (for removing CO2) 1 vertically is fixed on the supporting frame, is provided with a pond 9 below described spray washing tower (for removing CO2) 1, and the water in the described awl bucket 12 enters in this pond 9 by water-freeing arrangement 14, and the water in the pond 9 is regularly handled.First waterworks 4 and 4 of second waterworkss can utilize the water cycle in this pond 9 to use.
From the above mentioned, blast furnace gas spray alkali dechlorination device of the present invention has cooperated domestic big-and-middle-sized blast furnace gas dry dusting technical development required, acidic medium in the energy effective elimination blast furnace gas and a large amount of mechanical waters, make that the PH of water of condensation is controlled at 7～8 in the blast furnace gas, mechanical water content is less than 7g/Nm in the coal gas
3, avoid or reduced gas line, loop expansion pipe and subsequent technique equipment being corroded, thereby improved the life-span that blast furnace gas is carried facilities and equipment, satisfied user's service requirements.
The above only is the schematic embodiment of the present invention, is not in order to limit scope of the present invention.Any those skilled in the art, equivalent variations of having done under the prerequisite that does not break away from design of the present invention and principle and modification all should belong to the scope of protection of the invention.
Claims (10)
1. a blast furnace gas sprays alkali dechlorination device, it is characterized in that: this spray alkali dechlorination device constitutes by spraying washing tower (for removing CO2) and being arranged on the eddy flow plate water trap that sprays in the washing tower (for removing CO2) outlet pipe; Described spray washing tower (for removing CO2) includes a cylindrical shell that vertically is provided with, this cylindrical shell lower end is communicated with an awl bucket, and the sidewall of described cylindrical shell bottom is provided with inlet mouth, and described awl bucket bottom is provided with water-freeing arrangement, the top of described cylindrical shell is provided with the air outlet, and this air outlet connects described outlet pipe; Be positioned at the inlet mouth upside in described inner barrel and be interval with first waterworks, spray alkali device and filler dewatering unit from bottom to top in regular turn.
2. blast furnace gas spray alkali dechlorination device as claimed in claim 1 is characterized in that: also be provided with second waterworks between described first waterworks and spray alkali device.
3. blast furnace gas spray alkali dechlorination device as claimed in claim 1 is characterized in that: also be provided with the filler flushing arrangement above described filler dewatering unit.
4. blast furnace gas spray alkali dechlorination device as claimed in claim 3, it is characterized in that: described filler flushing arrangement is made of annular spray gun.
5. blast furnace gas spray alkali dechlorination device as claimed in claim 1, it is characterized in that: described first waterworks, second waterworks and spray alkali device are made of a plurality of spray guns around cylinder lateral wall respectively, and described each spray gun is run through sidewall and pointed to the setting of cylindrical shell center by the cylindrical shell outside.
6. blast furnace gas spray alkali dechlorination device as claimed in claim 5, it is characterized in that: described spray gun comprises that head extends near a plurality of short spray gun of inwall and head extends near a plurality of long spray gun in cylindrical shell center.
7. blast furnace gas spray alkali dechlorination device as claimed in claim 6, it is characterized in that: described a plurality of short spray guns and a plurality of long spray gun are respectively around the barrel uniform distribution.
8. blast furnace gas spray alkali dechlorination device as claimed in claim 5, it is characterized in that: described spray gun is provided with a plurality of nozzles downwards.
9. blast furnace gas as claimed in claim 1 spray alkali dechlorination device is characterized in that: on described outlet pipe and the position of closing on the air outlet be provided with and diffuse valve.
10. blast furnace gas spray alkali dechlorination device as claimed in claim 1 is characterized in that: be provided with the pond below described spray washing tower (for removing CO2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010548287 CN102061349A (en) | 2010-11-17 | 2010-11-17 | Alkali-spraying dechlorination device for blast-furnace gas |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010548287 CN102061349A (en) | 2010-11-17 | 2010-11-17 | Alkali-spraying dechlorination device for blast-furnace gas |
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| CN102061349A true CN102061349A (en) | 2011-05-18 |
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| CN 201010548287 Pending CN102061349A (en) | 2010-11-17 | 2010-11-17 | Alkali-spraying dechlorination device for blast-furnace gas |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104569092A (en) * | 2015-01-22 | 2015-04-29 | 首钢总公司 | Method and device used for detecting chlorine content of blast-furnace gas |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101603107A (en) * | 2009-07-14 | 2009-12-16 | 河北省首钢迁安钢铁有限责任公司 | Remove the system and the technology thereof of corrosive deposit in the iron-smelting blast furnace dry method dust coal gas |
| CN201459173U (en) * | 2009-08-03 | 2010-05-12 | 中冶赛迪工程技术股份有限公司 | Processing device for high furnace gas purification |
| CN201864738U (en) * | 2010-11-17 | 2011-06-15 | 中冶京诚工程技术有限公司 | Blast-furnace gas alkali spraying dechlorination device |
-
2010
- 2010-11-17 CN CN 201010548287 patent/CN102061349A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101603107A (en) * | 2009-07-14 | 2009-12-16 | 河北省首钢迁安钢铁有限责任公司 | Remove the system and the technology thereof of corrosive deposit in the iron-smelting blast furnace dry method dust coal gas |
| CN201459173U (en) * | 2009-08-03 | 2010-05-12 | 中冶赛迪工程技术股份有限公司 | Processing device for high furnace gas purification |
| CN201864738U (en) * | 2010-11-17 | 2011-06-15 | 中冶京诚工程技术有限公司 | Blast-furnace gas alkali spraying dechlorination device |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104569092A (en) * | 2015-01-22 | 2015-04-29 | 首钢总公司 | Method and device used for detecting chlorine content of blast-furnace gas |
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Application publication date: 20110518 |