CN201864738U - Blast-furnace gas alkali spraying dechlorination device - Google Patents

Blast-furnace gas alkali spraying dechlorination device Download PDF

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Publication number
CN201864738U
CN201864738U CN2010206118502U CN201020611850U CN201864738U CN 201864738 U CN201864738 U CN 201864738U CN 2010206118502 U CN2010206118502 U CN 2010206118502U CN 201020611850 U CN201020611850 U CN 201020611850U CN 201864738 U CN201864738 U CN 201864738U
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CN
China
Prior art keywords
spray
furnace gas
blast furnace
dechlorination
alkali
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Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
CN2010206118502U
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Chinese (zh)
Inventor
张传波
董艳苹
王世芹
刘红娟
李魏
柴凤飞
杜英春
牛得草
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
BEIJING JINGCHENG ZEYU ENERGY ENVIRONMENTAL PROTECTION ENGINEERING TECHNOLOGY Co Ltd
MCC Capital Engineering and Research Incorporation Ltd
Zhongye Jingcheng Engineering Technology Co Ltd
Original Assignee
BEIJING JINGCHENG ZEYU ENERGY ENVIRONMENTAL PROTECTION ENGINEERING TECHNOLOGY Co Ltd
Zhongye Jingcheng Engineering Technology Co Ltd
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Application filed by BEIJING JINGCHENG ZEYU ENERGY ENVIRONMENTAL PROTECTION ENGINEERING TECHNOLOGY Co Ltd, Zhongye Jingcheng Engineering Technology Co Ltd filed Critical BEIJING JINGCHENG ZEYU ENERGY ENVIRONMENTAL PROTECTION ENGINEERING TECHNOLOGY Co Ltd
Priority to CN2010206118502U priority Critical patent/CN201864738U/en
Application granted granted Critical
Publication of CN201864738U publication Critical patent/CN201864738U/en
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Abstract

The utility model relates to a blast-furnace gas alkali spraying dechlorination device, which comprises an alkali spraying tower and a vortex plate dehydrator which is arranged in a gas outlet pipeline of the alkali spraying tower, wherein the alkali spraying tower comprises a barrel which is vertically arranged; the lower end of the barrel is communicated with a tapered hopper; the side wall of the lower part of the barrel is provided with a gas inlet; the bottom of the tapered hopper is provided with a drainage; 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 spraying device, an alkali spraying device and a packing dehydration device are arranged in the barrel at intervals in sequence at the upper side of the gas inlet from bottom to top. The blast-furnace gas alkali spraying dechlorination device can effectively remove acid media and large amount of mechanical water in blast-furnace gas to make pH of condensate water in the blast-furnace gas controlled to be 7-8; and the content of the mechanical water in the gas is less than 7g/Nm3, thus, the probability that a gas pipeline, a compensator and subsequent processing equipment are abraded is avoided or reduced, and thereby the service lives of blast-furnace gas conveying facilities and equipment are prolonged.

Description

Blast furnace gas spray alkali dechlorination device
Technical field
The utility model is the corollary apparatus about a kind of blast furnace gas fully-dried type dust-removal system, relates 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.
The utility model content
The purpose of this utility model 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 purpose of this utility model is achieved in that 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 utility model, between described first waterworks and spray alkali device, also be provided with second waterworks.
In a better embodiment of the present utility model, above described filler dewatering unit, also be provided with the filler flushing arrangement.
In a better embodiment of the present utility model, described filler flushing arrangement is made of annular spray gun.
In a better embodiment of the present utility model, 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 utility model, 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 utility model, 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 utility model, described spray gun is provided with a plurality of nozzles downwards.
In a better embodiment of the present utility model, 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 utility model, 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 utility model 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 utility model done and schematically illustrates and explain, does not limit scope of the present utility model.Wherein,
Fig. 1: the structural representation of the utility model blast furnace gas spray alkali dechlorination device.
Fig. 2: A-A dissects structural representation among Fig. 1.
Embodiment
Understand for technical characterictic of the present utility model, purpose and effect being had more clearly, now contrast description of drawings embodiment of the present utility model.
As shown in Figure 1 and Figure 2, the utility model provides a kind of blast furnace gas spray alkali dechlorination device 100, and 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 utility model 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 utility model, is not in order to limit scope of the present utility model.Any those skilled in the art, equivalent variations of having done under the prerequisite that does not break away from design of the present utility model and principle and modification all should belong to the scope that the utility model is protected.

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).
CN2010206118502U 2010-11-17 2010-11-17 Blast-furnace gas alkali spraying dechlorination device Expired - Lifetime CN201864738U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN2010206118502U CN201864738U (en) 2010-11-17 2010-11-17 Blast-furnace gas alkali spraying dechlorination device

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Application Number Priority Date Filing Date Title
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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102061349A (en) * 2010-11-17 2011-05-18 中冶京诚工程技术有限公司 Alkali-spraying dechlorination device for blast-furnace gas
CN103993111A (en) * 2014-05-19 2014-08-20 首钢总公司 Device and method for carrying out dry dehydrochlorination on blast furnace gas

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102061349A (en) * 2010-11-17 2011-05-18 中冶京诚工程技术有限公司 Alkali-spraying dechlorination device for blast-furnace gas
CN103993111A (en) * 2014-05-19 2014-08-20 首钢总公司 Device and method for carrying out dry dehydrochlorination on blast furnace gas
CN103993111B (en) * 2014-05-19 2016-04-27 首钢总公司 A kind of device and method of blast furnace gas dry dehydrochlorination

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Granted publication date: 20110615