CN203498341U - Semi-coke tail gas desulfurization purifying device - Google Patents

Semi-coke tail gas desulfurization purifying device Download PDF

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Publication number
CN203498341U
CN203498341U CN201320317168.6U CN201320317168U CN203498341U CN 203498341 U CN203498341 U CN 203498341U CN 201320317168 U CN201320317168 U CN 201320317168U CN 203498341 U CN203498341 U CN 203498341U
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China
Prior art keywords
tail gas
blue charcoal
charcoal tail
charge
adsorption tower
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Withdrawn - After Issue
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CN201320317168.6U
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Chinese (zh)
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王斌
黄福来
麻梅芳
邵林烨
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Zhejiang Xizi United Engineering Co Ltd
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Zhejiang Xizi United Engineering Co Ltd
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Abstract

The utility model discloses a semi-coke tail gas desulfurization purifying device which mainly consists of a semi-coke tail gas inlet main pipe and a semi-coke tail gas outlet main pipe, wherein three semi-coke tail gas inlet branch pipes are arranged on the semi-coke tail gas inlet main pipe; three semi-coke tail gas outlet branch pipes are arranged on the semi-coke tail gas outlet main pipe; three adsorption units are arranged between the semi-coke tail gas inlet main pipe and the semi-coke tail gas outlet main pipe through the semi-coke tail gas inlet branch pipes and the semi-coke tail gas inlet branch pipes; adsorbents in an adsorption tower are arranged in layers, and different adsorbents are adopted according to different impurities, so that the adsorption purifying efficiency is high; with one path of superheated steam at the bottom of the adsorption tower, the tar on the surface of the adsorbent at the bottom layer can be molten to drop, and naphthalene can be volatized so as to ensure normal use of follow-up adsorbents; an air release valve at the tower top and a regeneration valve at the tower bottom are opened, so that a desulfurizing agent in the tower is subjected to oxidation regeneration by use of natural convection of air, and the sulfur capacity of the regenerated desulfurizing agent is improved by about 15%.

Description

Blue charcoal tail gas desulfurization purifier
Technical field
The utility model relates to the clean recycling of blue charcoal tail gas field, particularly a kind ofly for realizing high effect cleaning, reclaims blue charcoal tail gas, reduces sorbent material replacing amount, the blue charcoal tail gas desulfurization purifier of raising sorbent circulation utilization ratio.
Background technology
Blue charcoal is widely used in the industries such as iron alloy, calcium carbide, synthetic ammonia, also for fields such as blast furnace blowing, making gac, oil absorber, denitrfying agent and domestic fuels.Blue charcoal stove will produce a large amount of tail gas in producing blue charcoal process, and one ton of blue charcoal of about every production will produce 700 cubes of left and right of tail gas, calorific value 1700-2000 kilocalorie.
In blue charcoal tail gas, containing carbonic oxide, hydrogen, methane etc., be a kind of good Gas Energy Source, but also contain sulfurous gas, a large amount of impurity such as hydrogen sulfide, tar, naphthalene, dust.It is substantially all outer row that at present general blue charcoal stove produces tail gas.
Due to worldwide energy dilemma and pollute day by day serious, energy-saving and cost-reducing and administer to pollute and become the inevitable choice of building a resource-conserving and environment-friendly society.Lan Tan enterprise in process of production, if a large amount of blue charcoal tail gas of by-product is not recycled, but to sky discharge, will cause the significant wastage of resource.General produce 600000 tons of blue charcoal production lines per year, if the blue charcoal tail gas of the residue producing in remanufacture process for generating, generating set that can a set of 25MW of auxiliary construction.
At present, the mode that blue charcoal furnace exhaust gas can fully utilize is a lot, but no matter be which kind of utilizes mode, all will carry out desulfurizing and purifying, and according to the position of desulfurization, blue charcoal tail gas carries out desulfurizing and purifying and processes the preposition desulfurization treatment process of employing mostly.And preposition desulfurization treatment process is divided into wet desulphurization and two kinds of methods of dry desulfurization:
Wet desulphurization has much representativeness with arsenic alkaline process, ADA, modified ADA and tannin extract method.Catalytic wet oxidation technique is the main coal gas desulfurization technique of current China coking industry, is under the effect of catalyzer, and utilizing the ammonia in coal gas is the hydrogen sulfide in alkali source absorption coal gas.Doctor solution after absorbing hydrogen sulphide send regeneration section to carry out oxidation regeneration, and the hydrogen sulfide of absorption is changed into elemental sulfur, and certainly flows into foam chute with the form of sulphur foam, then must give birth to sulphur or ripe sulphur through centrifugation or melting treatment.Conventionally catalytic wet oxidation technique has the methods such as PDS, mimosa extract, HPF and FRC.The form of sweetener has high tower regeneration, regeneration tank regeneration, a tower desulfurization regeneration technique, a tower half formula desulfurization regeneration technique etc.
While adopting catalytic wet oxidation technique to be used for the desulfurization of blue charcoal coal gas, doctor solution is in absorbing coal gas in hydrogen sulfide, also can react with the SO2 in coal gas generation (NH4) 2SO3 or Na2SO3, cannot in regeneration tank or regenerator column, react with oxygen, by sulfur removing pregnant solution regeneration NH3H2O or Na2CO3 solution, can generate the secondary salts such as (NH4) 2SO4 or Na2SO4 on the contrary.Therefore, due to the existence of SO2, the regeneration effect of doctor solution greatly reduces, and the consumption of desulfurization alkali lye will correspondingly increase, and keep identical assimilation effect, must in system, add more fresh desulfurization alkali lye continuously.
In addition, because Wet Catalytic Oxidation Method desulfurization adopts the superficial velocity of packing tower, be 0.4~0.6m/s, absorber portion height is about 15m, and the reaction times, much larger than 5s, therefore the impact of CO2 is just very large, also can consume partial desulfurization alkali lye, and sweetening effectiveness is reduced.
Therefore, it is impracticable that the Wet Catalytic Oxidation Method of coke oven gas desulfurization is applied to blue charcoal coal gas desulfurization, need adjust it, to remove the interference of SO2 and CO2.Also there is the features such as equipment is more, and technological operation is also more complicated, and facility investment is larger in wet desulphurization simultaneously.
The Wet Catalytic Oxidation Method desulfurization of comparing, dry desulfurization efficiency is high, relatively suitable treatment is containing the lower coal gas of H2S, dry desulfurizing process is to utilize solid adsorbent to remove hydrogen sulfide and the organosulfur in coal gas, the degree of purification of desulfurization is higher, is applicable to the processing of lean sulphurous gas, is used for smart desulfurization, operation is simple and reliable, and conventional sweetening agent is inexpensive ferric oxide, gac at present.
Regenerative process is mostly super regeneration, regenerates complete at every turn, must the residual air in tower be blown off with steam, and after gas analysis is qualified, the tower that can fall is supplied gas.
And active carbon desulfurization is mainly catalysis and the adsorption that utilizes gac, the catalytic activity of gac is very strong, under the katalysis of gac, there is oxidizing reaction with O2 a small amount of in coal gas in the H2S in coal gas, the simple substance S that reaction generates is adsorbed in activated carbon surface.When activated carbon desulphurization agent absorption reaches capacity, desulfuration efficiency obviously declines, and must regenerate.The regeneration of gac is determined according to adsorbed material, S is under normal pressure, in the time of 190 ℃, start fusing, 440 ℃ of left and right just distil and become gaseous state, so the superheated vapour of general using 450-500 ℃ of left and right is regenerated to activated carbon desulphurization agent, when sweetening agent temperature is brought up to a certain degree, elemental sulfur is just separated out from gac, and the sulphur of separating out flows into sulfur recovery pond, forms solid-state sulphur after water-cooled.
In sum, the feature such as dry desulfurization be relatively applicable to be processed containing the lower coal gas of H2S, has system simple, and sorbent material is renewable, reduced investment, can be applicable at blue charcoal tail gas clean-up desulfuration field.But because blue charcoal tail gas contains a large amount of impurity, its result is moved soon after equipment investment often, and the first layer adsorbent surface has just covered the sticky contaminants such as one deck tar, naphthalene, and entire system was lost efficacy.
Utility model content
The purpose of this utility model is in order to solve the deficiency of above-mentioned technology, to provide a kind of can effectively overcome the blue charcoal tail gas desulfurization purifier of impurity on the impact of tail gas sweetening effectiveness in blue charcoal tail gas.
In order to achieve the above object, the blue charcoal tail gas desulfurization purifier that the utility model is designed, it is mainly comprised of blue charcoal tail gas intake header and blue charcoal tail gas outlet header, on blue charcoal tail gas intake header, being provided with the import of three blue charcoal tail gas is in charge of, on blue charcoal tail gas outlet header, be provided with three blue charcoal tail gas outlets and be in charge of, between blue charcoal tail gas intake header and blue charcoal tail gas outlet header, by the import of blue charcoal tail gas, be in charge of with the import of blue charcoal tail gas and be in charge of and be provided with three absorbing units.This constructional feature, can select absorbing unit of operation or two absorbing units or three absorbing units, the input that can reduce costs according to the amount of blue charcoal tail gas.
Absorbing unit is mainly comprised of adsorption tower, adsorption tower bottom is in charge of and is connected with the import of blue charcoal tail gas, adsorption tower top is in charge of and is connected with blue charcoal tail gas outlet, in the import of blue charcoal tail gas, be in charge of with blue charcoal tail gas outlet and be in charge of and be equipped with shut-off valve, in the blue charcoal tail gas import between shut-off valve and adsorption tower, be in charge of with blue charcoal tail gas outlet and be in charge of and be equipped with point for measuring temperature and pressure tap, in the blue charcoal tail gas import between shut-off valve and adsorption tower, be in charge of near shut-off valve place and be provided with nitrogen purging head, at adsorption tower top, be provided with blow-down pipe, blow-down pipe is provided with blow-off valve, on blow-down pipe, be provided with analysis site, in adsorption tower bottom, be provided with superheat steam pipeline and regeneration pipeline, on superheat steam pipeline, be provided with shutdown valve, on regeneration pipeline, be provided with regeneration valve, in adsorption tower bottom, be provided with condensate drain pipeline, on condensate drain pipeline, be provided with water drain valve, condensate drain pipeline is communicated to sewage lagoon.
In adsorption tower inside, be provided with successively from the bottom to top SL-6 type sorbent material, SL-3 type sorbent material, SL-2 type sorbent material.
SL-6 type sorbent material major ingredient is aluminium sesquioxide, and SL-3 type sorbent material major ingredient is gac, and SL-2 type sorbent material major ingredient is α and γ ferric oxide.
The using method of blue charcoal tail gas desulfurization purifier, blue charcoal tail gas enters from blue charcoal tail gas intake header, through blue charcoal tail gas import, be in charge of and enter adsorption tower bottom, by SL-6 type sorbent material, remove moisture and large granular impurity, through SL-3 type sorbent material, remove tar, supersaturation naphthalene and solid particle polluter again, pass through the desulfurization of SL-2 type sorbent material, the blue charcoal tail gas after purification is in charge of and is entered blue charcoal tail gas outlet header discharge from blue charcoal tail gas outlet again.
After the SL-3 type sorbent material absorption certain hour of adsorption tower inside, can make adsorption tower resistance increase, when adsorption tower resistance reaches certain value, need regeneration; During regeneration, the shut-off valve of respectively the blue charcoal tail gas import of single adsorption tower is in charge of, the outlet of blue charcoal tail gas being in charge of cuts out, with superheated vapour (0.3MPa, 180 ℃) the SL-3 sorbent material of adsorption tower hypomere is purged, make to be adsorbed tar and from the condensate drain pipeline of adsorption tower bottom, be discharged to sewage lagoon with superheated vapour purging water of condensation, the volatilization of supersaturation naphthalene, superheated vapour purges end and then moisture in adsorption tower is replaced with nitrogen by nitrogen purging head, and the sorbent material after regeneration can again drop into blue charcoal tail gas clean-up and produce.
The SL-2 type sorbent material of adsorption tower inside is used after certain hour, while finding that adsorption tower outlet hydrogen sulfide content approaches set quota, the blue charcoal tail gas import of adsorption tower can be in charge of to the shut-off valve of being in charge of with blue charcoal tail gas outlet closes, and then by nitrogen purging head by nitrogen to blue charcoal tail gas in adsorption tower replace safety qualified after, again the regeneration valve on the blow-off valve on blow-down pipe and regenerating tube is opened, utilize natural convection air, SL-2 type sorbent material in adsorption tower is carried out to oxidation regeneration, when regeneration no longer raises to SL-2 type adsorbent temperature, regeneration ending, can be from newly coming into operation after qualified by replacing in adsorption tower with nitrogen by nitrogen purging head after regeneration.
The resulting blue charcoal tail gas desulfurization purifier of the utility model, it has following features:
1, the agent of adsorption tower internal adsorption adopts layering setting, and the impurity feature according to different, adopts different sorbent materials, and the efficiency of adsorption cleaning is high.
2, by arranging one in adsorption tower bottom, pass by hot steam, make the tar of bottom adsorbent surface can melt drippage, and naphthalene can volatilize, thereby guarantee that follow-up sorbent material can normally be used.
3, by the regeneration valve being arranged at the bottom of tower top blow-off valve and tower is opened, utilize natural convection air, sweetening agent in tower is carried out to oxidation regeneration, the sweetening agent Sulfur capacity after regeneration can improve 15% left and right.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model.
Embodiment
Below by embodiment, the utility model will be further described by reference to the accompanying drawings.
Embodiment 1:
As shown in Figure 1, the blue charcoal tail gas desulfurization purifier that the present embodiment is described, it is mainly comprised of blue charcoal tail gas intake header 1 and blue charcoal tail gas outlet header 2, on blue charcoal tail gas intake header 1, be provided with the import of three blue charcoal tail gas and be in charge of 19, on blue charcoal tail gas outlet header 2, be provided with three blue charcoal tail gas outlets and be in charge of 20, between blue charcoal tail gas intake header 1 and blue charcoal tail gas outlet header 2 by the import of blue charcoal tail gas be in charge of 19 and the import of blue charcoal tail gas be in charge of 19 and be provided with three absorbing units.
Absorbing unit is mainly comprised of adsorption tower 3, adsorption tower 3 bottoms are in charge of 19 with the import of blue charcoal tail gas and are connected, adsorption tower 3 tops are in charge of 20 with blue charcoal tail gas outlet and are connected, in the import of blue charcoal tail gas, being in charge of 19 is in charge of and on 20, is equipped with shut-off valve 4 with the outlet of blue charcoal tail gas, blue charcoal tail gas import between shut-off valve 4 and adsorption tower 3 is in charge of 19 and is in charge of and on 20, is equipped with point for measuring temperature 5 and pressure tap 6 with the outlet of blue charcoal tail gas, blue charcoal tail gas import between shut-off valve 4 and adsorption tower 3 is in charge of close shut-off valve 4 places on 19 and is provided with nitrogen purging head 14, at adsorption tower 3 tops, be provided with blow-down pipe 9, blow-down pipe 9 is provided with blow-off valve, on blow-down pipe 9, be provided with analysis site 15, in adsorption tower 3 bottoms, be provided with superheat steam pipeline 7 and regeneration pipeline 21, on superheat steam pipeline 7, be provided with shutdown valve 13, on regeneration pipeline 21, be provided with regeneration valve 11, in adsorption tower 3 bottoms, be provided with condensate drain pipeline 8, on condensate drain pipeline 8, be provided with water drain valve 12, condensate drain pipeline 8 is communicated to sewage lagoon 10.
In adsorption tower 3 inside, be provided with successively from the bottom to top SL-6 type sorbent material 16, SL-3 type sorbent material 17, SL-2 type sorbent material 18.
SL-6 type sorbent material 16 major ingredient are aluminium sesquioxide, and SL-3 type sorbent material 17 major ingredient are gac, and SL-2 type sorbent material 18 major ingredient are α and γ ferric oxide.
The using method of blue charcoal tail gas desulfurization purifier, blue charcoal tail gas enters from blue charcoal tail gas intake header 1, the import of the blue charcoal tail gas of process is in charge of 19 and is entered adsorption tower 3 bottoms, by SL-6 type sorbent material 16, remove moisture and large granular impurity, through SL-3 type sorbent material 17, remove tar, supersaturation naphthalene and solid particle polluter again, pass through 18 desulfurization of SL-2 type sorbent material, the blue charcoal tail gas after purification is in charge of 20 from blue charcoal tail gas outlet and is entered blue charcoal tail gas outlet header 2 discharges again.
After the SL-3 type sorbent material 17 absorption certain hours of adsorption tower 3 inside, can make adsorption tower 3 resistances increase, when adsorption tower 3 resistances reach certain value, need regeneration; During regeneration, the shut-off valve 4 of respectively the blue charcoal tail gas import of single adsorption tower 3 is in charge of to 19, the outlet of blue charcoal tail gas being in charge of on 20 cuts out, with superheated vapour (0.3MPa, 180 ℃) the SL-3 sorbent material of adsorption tower 3 hypomeres is purged, make to be adsorbed tar and from the condensate drain pipeline 8 of adsorption tower 3 bottoms, be discharged to sewage lagoon 10 with superheated vapour purging water of condensation, the volatilization of supersaturation naphthalene, superheated vapour purges end and then by nitrogen purging head 14 use nitrogen, the interior moisture of adsorption tower 3 is replaced, and the sorbent material after regeneration can again drop into blue charcoal tail gas clean-up and produce.
The SL-2 type sorbent material 18 of adsorption tower 3 inside is used after certain hour, while finding that adsorption tower 3 outlet hydrogen sulfide contents approach set quota, the blue charcoal tail gas import of adsorption tower 3 can be in charge of 19 and the shut-off valve 4 be in charge of on 20 of blue charcoal tail gas outlet close, and then by nitrogen purging head 14 by nitrogen to the interior blue charcoal tail gas of adsorption tower 3 replace safety qualified after, again the regeneration valve on the blow-off valve on blow-down pipe 9 and regenerating tube 11 is opened, utilize natural convection air, SL-2 type sorbent material 18 in adsorption tower 3 is carried out to oxidation regeneration, when regeneration no longer raises to SL-2 type sorbent material 18 temperature, regeneration ending, can be from newly coming into operation after the interior displacement of adsorption tower 3 is qualified by nitrogen purging head 14 use nitrogen after regeneration.

Claims (3)

1. a blue charcoal tail gas desulfurization purifier, it is mainly comprised of blue charcoal tail gas intake header and blue charcoal tail gas outlet header, it is characterized in that on blue charcoal tail gas intake header, being provided with the import of three blue charcoal tail gas is in charge of, on blue charcoal tail gas outlet header, be provided with three blue charcoal tail gas outlets and be in charge of, between blue charcoal tail gas intake header and blue charcoal tail gas outlet header, by the import of blue charcoal tail gas, be in charge of with the import of blue charcoal tail gas and be in charge of and be provided with three absorbing units.
2. according to right, want the blue charcoal tail gas desulfurization purifier described in 1, it is characterized in that absorbing unit is mainly comprised of adsorption tower, adsorption tower bottom is in charge of and is connected with the import of blue charcoal tail gas, adsorption tower top is in charge of and is connected with blue charcoal tail gas outlet, in the import of blue charcoal tail gas, be in charge of with blue charcoal tail gas outlet and be in charge of and be equipped with shut-off valve, in the blue charcoal tail gas import between shut-off valve and adsorption tower, be in charge of with blue charcoal tail gas outlet and be in charge of and be equipped with point for measuring temperature and pressure tap, in the blue charcoal tail gas import between shut-off valve and adsorption tower, be in charge of near shut-off valve place and be provided with nitrogen purging head, at adsorption tower top, be provided with blow-down pipe, blow-down pipe is provided with blow-off valve, on blow-down pipe, be provided with analysis site, in adsorption tower bottom, be provided with superheat steam pipeline and regeneration pipeline, on superheat steam pipeline, be provided with shutdown valve, on regeneration pipeline, be provided with regeneration valve, in adsorption tower bottom, be provided with condensate drain pipeline, on condensate drain pipeline, be provided with water drain valve, condensate drain pipeline is communicated to sewage lagoon.
3. blue charcoal tail gas desulfurization purifier according to claim 2, is characterized in that being provided with successively from the bottom to top in adsorption tower inside SL-6 type sorbent material, SL-3 type sorbent material, SL-2 type sorbent material.
CN201320317168.6U 2013-06-03 2013-06-03 Semi-coke tail gas desulfurization purifying device Withdrawn - After Issue CN203498341U (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103316563A (en) * 2013-06-03 2013-09-25 浙江西子联合工程有限公司 Desulfurization and purification device for semi-coke tail gas and usage method of same

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103316563A (en) * 2013-06-03 2013-09-25 浙江西子联合工程有限公司 Desulfurization and purification device for semi-coke tail gas and usage method of same

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Granted publication date: 20140326

Effective date of abandoning: 20151007

AV01 Patent right actively abandoned

Granted publication date: 20140326

Effective date of abandoning: 20151007