CN202465751U - Dry dust-removing and dechlorinating composite device for blast furnace coal gas - Google Patents
Dry dust-removing and dechlorinating composite device for blast furnace coal gas Download PDFInfo
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- CN202465751U CN202465751U CN2012200708223U CN201220070822U CN202465751U CN 202465751 U CN202465751 U CN 202465751U CN 2012200708223 U CN2012200708223 U CN 2012200708223U CN 201220070822 U CN201220070822 U CN 201220070822U CN 202465751 U CN202465751 U CN 202465751U
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- blast furnace
- dechlorination
- dust
- coal gas
- ash separator
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Abstract
The utility model discloses a dry dust-removing and dechlorinating composite device for blast furnace coal gas. The dry dust-removing and dechlorinating composite device comprises a power generating device and a pressure reducing valve group which are connected behind a blast furnace by pipelines in parallel; the dry dust-removing and dechlorinating composite device is characterized in that a granular-bed dust collector is connected between the power generating device and the pressure reducing valve group in series; and the granular-bed dust collector contains dechlorinated particles, desulfurated particles and deaminized particles. According to the utility model, dust removal, dechlorination, desulfurization, deamination, moisture absorption as well as afterheat and excessive pressure recycling can be effectively carried out on the blast furnace coal gas; strong adaptability to component variation of the blast furnace coal gas is obtained; problems of corrosion and salification on equipment and pipeline due to dry dust removal are solved; and anticorrosion measures are not needed for follow-up user pipelines and equipment. The dust content of dust free gas at an outlet of the dry dust-removing and dechlorinating composite device for the blast furnace coal gas is not more than 5 mg/Nm3; and chloride ion content in coal gas condensed water is less than 300 mg/L, and the pH value of the coal gas condensed water is 6-8.
Description
Technical field
The utility model relates to a kind of gas cleaning device.
Technical background
Hazardous mediums such as dust-laden and chlorine, sulphur, ammonia for the processing of blast furnace gas, should satisfy the requirement (dust content of gas≤5mg/Nm after the purification of dedusting precision in the raw gas that produces during blast-furnace smelting
3), remove hazardous mediums such as chlorine in the coal gas, sulphur, ammonia again, also to recycle the waste heat overbottom pressure of blast furnace gas as far as possible.
The domestic and international at present method for dust removal to blast furnace gas divides two-stage to accomplish, and the first step adopts inertial dust separator to carry out thick dedusting, like gravitational precipitator or tornado dust collector; The second stage then mainly contains following two types of smart method for dust removals: 1) wet method: this method adopts the circumferential weld washing device to carry out the purification of blast furnace gas; Also there are the two civilian washers of employing in old steel mill; Wet dedusting has system's mature and reliable, the low advantage of investment; But wet dedusting labor water resources makes blast furnace gas temperature be reduced to below 70 ℃, has wasted the residual heat resources of blast furnace gas.2) dry-method bag-type dust collecting: the policy requirements that responds national energy-conserving and environment-protective; Domestic blast furnace adopts dry dedusting technology in a large number; This technology is ripe relatively and produced energy-saving benefit preferably; But in actual production, the media such as moisture and chlorine, sulphur, ammonia because of coal gas make that sack cleaner hardens, the new problem of gas line and the quick burn into salification of auxiliary facility become and hinder conspicuous contradiction that this technology is used.
The utility model content
The purpose of the utility model is to provide a kind of blast furnace gas dry dusting dechlorination set composite that solves dedusting, dechlorination, sulphur, ammonia simultaneously.
To achieve these goals, adopt following technical scheme:
A kind of blast furnace gas dry dusting dechlorination set composite; Comprise power generation assembly and reducing valve group through the parallel connection of pipe connection behind blast furnace; It is characterized in that: be serially connected with the grain bed fly-ash separator before said power generation assembly and the reducing valve group, contain dechlorination particle, desulfurization particle and deamination particle in the said grain bed fly-ash separator.As further optimization,, has the water absorbability particle in the said grain bed fly-ash separator in order to solve condensation trouble.
As further optimization,, be provided with thick cleaning apparatus before the said grain bed fly-ash separator in order to obtain dust removing effects preferably.
As further optimization, be provided with the smart cleaning apparatus of dry method after the said grain bed fly-ash separator.
The smart cleaning apparatus of said dry method is sack cleaner, electric precipitator, metal dusting device or the north plate fly-ash separator that burns.
Said thick cleaning apparatus is gravitational precipitator, tornado dust collector or ceramic high temperature fly-ash separator.
The utlity model has following beneficial effect:
1) dedusting in the utility model, dechlorination, desulfuration efficiency height, the purified gas dustiness≤5mg/Nm that obtains
3, chloride ion content＜300mg/L, PH=6 ~ 8 in the gas condensed water;
2) the utility model is a dry-method dust-removal device, compares with wet dedusting, and it is simple, reliable to have system, not power consumption basically, water consumption not, and the dedusting dry ash can directly be recycled, no sludge treatment facility; The about 1500Pa of SR loss, blast furnace gas temperature does not reduce basically, and the supporting with it turbine generators turbine generators generating efficiency height more supporting than conventional wet dedusting is about more than 30%;
3) compare with traditional dry-method bag-type dust collecting, electrostatic precipitation; Said blast furnace gas dry dusting dechlorination set composite is except that the advantage that has kept dry method dust; The effect that also has dechlorination, desulfurization, deamination has solved the blast furnace gas equipment, Corrosion of Pipeline, the salification problem that are arranged in thereafter.
4) described grain bed fly-ash separator contains the water absorbability particle; Can slough the moisture in the blast furnace gas; The low temperature dewfall that has solved the smart cleaning apparatus of the dry type that is arranged in thereafter (like the sack cleaner) problem that hardens; And then can adapt to the worst cold case of blast furnace gas, need not specially for this reason, fly-ash separator is equipped with blast furnace gas low temperature reply facility;
5) in the blast furnace gas dry dusting dechlorination set composite; Described grain bed fly-ash separator is high temperature resistant, and as adopting silica sand as the grain bed filler, its fusing point is 1750 ℃; Even changing, conditions of blast furnace make blast furnace gas temperature reach 600 ℃; Grain bed is normal trouble-free service still, and blast furnace gas temperature is high more, and the grain bed efficiency of dust collection is high more.
To sum up, utilize this device, can realize the recycling of blast furnace gas 100%, improved dry-dedusting system reliability of operation and stability greatly; Efficiency of dust collection is high; The flexibility that conditions of blast furnace is changed is strong, need not to be specially blast furnace gas equipment, pipeline corrosion protection, desalination reply facility, and makes full use of its waste heat overbottom pressure; To greatest extent blast furnace gas is effectively recycled; Low drop into, the high efficiency while, reach the purpose of energy-saving and environmental protection, to guarantee the blast furnace stably manufactured, reduce environmental pollution, crucial meaning has cut down the consumption of energy.
Description of drawings
Fig. 1 is the structural representation of embodiment 1;
Fig. 2 is the structural representation of embodiment 2;
Fig. 3 is the structural representation of embodiment 3.
Among the figure, 1 is blast furnace, and 2 is the grain bed fly-ash separator, and 3 is power generation assembly inlet valve group, and 4 is power generation assembly, and 5 is power generation assembly outlet valve group, and 6 is the reducing valve group, and 7 is the purified gas pipe network, and 8 is the smart cleaning apparatus of dry method, and 9 is thick cleaning apparatus.
Embodiment
Below in conjunction with accompanying drawing and specific embodiment the utility model is described further, but therefore the utility model is not limited among the following concrete mode.
Embodiment 1: as shown in Figure 1; Blast furnace 1 stock gas gets into grain bed fly-ash separator 2 through pipeline; Clear height producer gas behind the impurity such as dedusting, dechlorination, sulphur, ammonia is incorporated purified gas pipe network 7 into after power generation assembly 4 generatings, do not move like power generation assembly 4, then through incorporating purified gas pipe network 7 after the reducing valve group 6 into.
Dust separating process is following:
1) blast furnace raw gas (about 200 ℃) the entering grain bed fly-ash separator 2 from the discharging of blast furnace 1 furnace roof carries out the dedusting dechlorination, and the dry ash after the dedusting can directly be recycled;
2) through the blast furnace purified gas dustiness≤5mg/Nm of described blast furnace gas dry dusting dechlorination set composite
3Chloride ion content＜300mg/L, PH=6 ~ 8 in the gas condensed water; Purified gas gets into the turbine generators generating, owing to do not have temperature drop and pressure drop very low (SR loses less than 1500Pa) basically in the preceding two-stage dust removal installation, the turbine generators generated energy increases considerably;
3) if turbine generators breaks down or blast furnace gas does not satisfy the requirement of turbine generators inlet, the reducing valve group 6 parallelly connected with turbine generators of the direct warp of clear height producer gas after the dedusting imports purified gas pipe network 7.
Embodiment 2; As shown in Figure 2: different with embodiment 1 is; Grain bed fly-ash separator 2 is provided with the smart cleaning apparatus 8 of dry method thereafter in addition as the thick cleaning apparatus of blast furnace gas, and said smart cleaning apparatus 8 is sack cleaner, electric precipitator, metal dusting device or the north plate fly-ash separator that burns.
Embodiment 3, and is as shown in Figure 3: different with embodiment 2 is, is provided with thick cleaning apparatus 9 before the grain bed fly-ash separator 2, and said thick cleaning apparatus 2 is gravitational precipitator, tornado dust collector or ceramic high temperature fly-ash separator.
The utility model adopts blast furnace gas dry dusting dechlorination set composite; In dry dedusting technology, introduce the grain bed fly-ash separator; The advantage that has kept the conventional dry dust collecting process fully; Have following notable feature simultaneously: said grain bed fly-ash separator contains dechlorination particle, desulfurization particle, deamination particle and water absorbability particle, the effect of dechlorination, desulfurization, deamination, moisture absorption.It is the particle (like perlite, silica sand or dedusting ash) below the 10mm that said grain bed fly-ash separator dedusting filtrate can adopt particle diameter; Sorbent material can adopt the compound active ingredient sorbent material of gas dechlorination, sulphur, ammonia, and this sorbent material is made up of alkaline active ingredient below 20% (like alumina, high-al clay, activated alumina) and catalyzer (like nickel catalyzator); Said water absorbability particle account for total particle 40% in.Solve equipment, corrosive pipeline, salification problem that dry method dust brings, subsequent user pipeline and equipment need not to take anti-corrosion measure again; Can slough the moisture in the blast furnace gas; The low temperature dewfall that has solved the smart cleaning apparatus of the dry type that is arranged in thereafter (like the sack cleaner) problem that hardens; And then can adapt to the worst cold case of blast furnace gas, need not specially for this reason, fly-ash separator is equipped with blast furnace gas low temperature reply facility.
The dust removal process of said grain bed fly-ash separator is following: filtering dust is constantly accumulated; Make the grain bed dust remover resistance rise; When resistance rises to 1500～2000 Pa; Adopt reverse gas cleaning gas through grain bed, grain bed is in fluidized state, and wherein dust granule is taken away by cleaning gas owing to particle diameter is little, in light weight.The reverse gas cleaning gas of grain bed can use the middle pressure nitrogen of pipe network in the factory, also can use the blast furnace purified gas after the pressurization, and the reverse gas cleaning gas atmosphere is 0.4～0.6MPa.
More than show and described ultimate principle, principal character and the advantage of the utility model.The technician of the industry should understand; The utility model is not restricted to the described embodiments; The principle of describing in the foregoing description and the specification sheets that the utility model just is described; Under the prerequisite that does not break away from the utility model spirit and scope, the utility model also has various changes and modifications, and these variations and improvement all fall in the utility model scope that requires protection.
Claims (6)
1. blast furnace gas dry dusting dechlorination set composite; Comprise power generation assembly and reducing valve group through the parallel connection of pipe connection behind blast furnace; It is characterized in that: be serially connected with the grain bed fly-ash separator before said power generation assembly and the reducing valve group, contain dechlorination particle, desulfurization particle and deamination particle in the said grain bed fly-ash separator.
2. blast furnace gas dry dusting dechlorination set composite as claimed in claim 1 is characterized in that: have the water absorbability particle in the said grain bed fly-ash separator.
3. blast furnace gas dry dusting dechlorination set composite as claimed in claim 1 is characterized in that: be provided with thick cleaning apparatus before the said grain bed fly-ash separator.
4. like claim 1 or 3 described blast furnace gas dry dusting dechlorination set composites, it is characterized in that: be provided with the smart cleaning apparatus of dry method after the said grain bed fly-ash separator.
5. blast furnace gas dry dusting dechlorination set composite as claimed in claim 4 is characterized in that: the smart cleaning apparatus of said dry method is sack cleaner, electric precipitator, metal dusting device or the north plate fly-ash separator that burns.
6. blast furnace gas dry dusting dechlorination set composite as claimed in claim 3 is characterized in that: said thick cleaning apparatus is gravitational precipitator, tornado dust collector or ceramic high temperature fly-ash separator.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200708223U CN202465751U (en) | 2012-02-29 | 2012-02-29 | Dry dust-removing and dechlorinating composite device for blast furnace coal gas |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200708223U CN202465751U (en) | 2012-02-29 | 2012-02-29 | Dry dust-removing and dechlorinating composite device for blast furnace coal gas |
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|---|---|
| CN202465751U true CN202465751U (en) | 2012-10-03 |
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| CN2012200708223U Expired - Lifetime CN202465751U (en) | 2012-02-29 | 2012-02-29 | Dry dust-removing and dechlorinating composite device for blast furnace coal gas |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102534082A (en) * | 2012-02-29 | 2012-07-04 | 中冶赛迪工程技术股份有限公司 | Dry-process dust-removing and dechlorination combined device for blast furnace gas |
| CN105256091A (en) * | 2015-10-30 | 2016-01-20 | 太仓东能环保设备有限公司 | Dry dedusting technology for blast furnace gas |
| CN111378801A (en) * | 2020-03-30 | 2020-07-07 | 北京北大先锋科技有限公司 | Process method and device for removing hydrogen chloride by powder injection of blast furnace gas pipeline |
-
2012
- 2012-02-29 CN CN2012200708223U patent/CN202465751U/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102534082A (en) * | 2012-02-29 | 2012-07-04 | 中冶赛迪工程技术股份有限公司 | Dry-process dust-removing and dechlorination combined device for blast furnace gas |
| CN105256091A (en) * | 2015-10-30 | 2016-01-20 | 太仓东能环保设备有限公司 | Dry dedusting technology for blast furnace gas |
| CN111378801A (en) * | 2020-03-30 | 2020-07-07 | 北京北大先锋科技有限公司 | Process method and device for removing hydrogen chloride by powder injection of blast furnace gas pipeline |
| CN111378801B (en) * | 2020-03-30 | 2021-06-22 | 北京北大先锋科技有限公司 | Process method and device for removing hydrogen chloride by powder injection of blast furnace gas pipeline |
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Granted publication date: 20121003 |
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