CN106629627A - Method for preparing sulphurous acid by using sulfur as raw material - Google Patents
Method for preparing sulphurous acid by using sulfur as raw material Download PDFInfo
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- CN106629627A CN106629627A CN201611082486.3A CN201611082486A CN106629627A CN 106629627 A CN106629627 A CN 106629627A CN 201611082486 A CN201611082486 A CN 201611082486A CN 106629627 A CN106629627 A CN 106629627A
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- combustion
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- sulfurous acid
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B17/00—Sulfur; Compounds thereof
- C01B17/48—Sulfur dioxide; Sulfurous acid
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Abstract
The invention belongs to the field of chemical engineering, particularly relates to a method for preparing sulphurous acid by using sulfur as a raw material, and also relates to application of a sulphurous acid product produced by the method. The method comprises the following steps that a furnace door of a combustion furnace is opened; solid sulfur is put into combustion discs; then, partial solid sulfur is fed into a dissolving box through a feeding opening formed in the upper part of the combustion furnace; meanwhile, water is added into an acid storage tank; an injection pump, a fan and an air door of the combustion furnace are opened; sulfur dioxide gas generated during sulfur combustion is exhausted through an air outlet, is subjected to temperature reduction and cooling in a position of a smoke pipe connected with the air outlet and is then absorbed by an ejector; absorption tower and tail gas absorption tower process water valves are regulated; an anticorrosion pump is started to spray process water into a tail gas absorption tower. After a sulphurous acid production system provided by the invention is used, the sulfur treatment quantity is effectively increased, and is increased to 250kg/h from the sulfur treatment quantity of 100 to 150kg/h of ordinary equipment, so that the sulfur utilization rate is improved to 99.5 percent from about 70 percent; the SO2 content of tail gas is smaller than or equal to 5mg/Nm<3>.
Description
Technical field
The invention belongs to chemical field, and in particular to a kind of method for preparing sulfurous acid as raw material with sulphur.
Background technology
In production of corn starch process, need to be to corn soaking, it is food grade sulfurous acid to soak adopted raw material, mesh
Front Maize Production enterprise is commercially difficult to buy the sulfur dioxide for producing the food grade of sulfurous acid, even if Some Enterprises
Outsourcing obtains food grade sulfur dioxide, and sulfur dioxide is injected in industrial water, and preparation meets the sulfurous acid of production requirement to be used for
In the immersion of cornstarch, but the sulfur dioxide of purchase is not easily-controllable or uncontrollable due to its production process, does not very meet country
Relevant regulation, therefore the method is eliminated.
Maize Production enterprise buys food grade sulphur, carries out burning and produces sulfur dioxide, and with water absorption sulfurous acid is prepared, should
The defect of method is that the maximum burning capacity of existing sulphur stove is 100-150kg/h, with the increase of quantity combusted, combustion
Burning the temperature in stove necessarily also increases, and combustion furnace interior temperature spends Gao Zehui makes sulphur distil, it is impossible to effectively utilizes.
Accordingly, it would be desirable to be directed to above-mentioned defect be improved, to preparing the method for sulfurous acid with sulphur as raw material and being
System is all improved, and makes the sulfurous acid quality that the method is produced meet the requirement of institute of enterprise converted products, and make design be
System avoids the sulphur phenomenon that can not be used effectively of distillation using raw material sulphur to greatest extent.
The content of the invention
In order to solve above-mentioned technical problem, the invention provides a kind of can make producing sulfurous acid by raw material of sulphur
During, the method for sulphur utilization rate can be effectively improved, and the sulfurous acid produced is met needed for corn soaking；
The method that sulfurous acid is prepared as raw material with sulphur of the present invention, including following steps：
(1) fire door of combustion furnace is opened, solid sulfur is placed in tray for combustion, then thrown by the charge door of upper furnace
Enter fraction solids sulphur extremely to dissolve in case；Simultaneously water is added in acid storage tank,
(2) jet pump, blower fan are opened；
(3) sulfur dioxide gas for producing during sulfur burning are discharged by the air outlet of combustion furnace, are being connected with air outlet
Absorb to injector after cooling down at the smoke pipe for connecing；
(4) absorption tower and tail gas absorber process water valve are adjusted, to tail gas absorber process water is sprayed；
The tail gas in the circulating pump spray-absorption acid storage tank of absorption tower is opened, the valve below absorption tower is opened, buffering is kept
Tank liquid level equilibrium, makes sulfurous acid current toward in acid storage tank or surge tank, controls concentration 0.15-0.2% of acid；
As acid storage tank sulfurous acid concentration 0.15-0.2%, sulfurous acid pump is opened out, close the valve opening that low level goes out acid
High-order goes out sour valve, and output products sulfurous acid is to the sour workshop of storage.
To the half that amount of water in acid storage tank is acid storage tank volume in above-mentioned step (1).
PH >=10 are kept in above-mentioned step (4) to tail gas absorber spray process current liquid feeding alkali.
Sulphur employed in the present invention prepares the sulfurous acid production system used by sulfurous acid for raw material, and system includes burning
Stove, combustion furnace is connected with upper and lower two bypass lines, and superposed gas bypass line is connected with injector, the injector with
Acid storage tank top is connected, and the bypass line positioned at bottom is connected with acid storage tank bottom, has in the bypass line of bottom
Jet pump；
Process waterpipe is also associated between combustion furnace and injector；
Acid storage tank top is connected with gas pipeline, and gas pipeline is divided into two bypass lines, the gas pipeline of tie point
On be sequentially connected in series absorption tower, blower fan, tail gas tower；Surge tank is connected with the gas pipeline of the second branch road；Absorption tower and buffering
Circulating pump is connected with by pipeline between tank；
There is process waterpipe inside acid storage tank, process waterpipe is divided into two bypass lines, tie point pipeline and absorption
Tower is connected, and surge tank is led on the second branch road, is connected by pipeline between tail gas tower bottom and surge tank, tail gas tower bottom
Pipeline and the second bypass line between surge tank accumulates pipeline all the way and leads to surge tank；
Acid storage tank bottom is connected with and sulfurous acid product is delivered to into the sulfurous acid pump and conveyance conduit of workshop acid tank；
Tail gas tower top is connected with two bypass lines, wherein being sequentially connected in series corrosion protection pump and collection in a bypass line
Case, tail gas tower top is connected with another bypass line, and this two bypass lines are pooled together leads to surge tank.
Sulphur prepares the sulfurous acid production system used by sulfurous acid for raw material, and combustion furnace includes body of heater, fire door, slag notch,
Positioned at the combustion chamber of furnace interior, the tray for combustion of combustion chamber, there are air outlet, combustion chamber on the body of heater roof above slag notch
Inside there is at least two-layer tray for combustion, there are multiple spout holes on tray for combustion.
There is shelf Inner Wall of Combustion Chamber both sides, there is draw-in groove in shelf, and tray for combustion is flexibly connected with the shelf of both sides by draw-in groove；
Tray for combustion has two-layer, and two-layer tray for combustion shape size is identical, and two-layer tray for combustion is rectangle, tray for combustion surrounding
There is baffle plate；Respectively there is a spout hole at four angles of two-layer tray for combustion, two in two-layer tray for combustion near one end of fire door are overflow
The height of discharge orifice is 2-3 times of two spout hole height away from fire door one end；
Upper top of the combustion chamber near fire door side has charge door, and there is dissolving case charge door lower section, and dissolving case is equipped with use
In the regulating valve of control material flow, dissolving case and combustion chamber；
There is expansion chamber between combustion chamber and slag notch, expansion chamber is located at air outlet lower section, and there is demarcation strip sedimentation interior, separates
Plate top is connected with roof on combustion chamber, and demarcation strip foot is not connected with sedimentation chamber interior walls bottom；
The foot of demarcation strip and the 1/10-1/4 that the distance of the bottom of sedimentation chamber interior walls is expansion chamber total height；
The indoor demarcation strip of sedimentation is made up of one piece of swash plate and one piece of vertical plate, and demarcation strip is in " √ " shape, swash plate with it is vertical
Angle between plate is 110 ° -140 °；
Ratio of distances constant of the vertical plate of demarcation strip away from expansion chamber both sides is 1:1-3；
There is condensation water leg outside body of heater, the topmost that the foot of chuck has condensation water inlet, chuck has condensed water to go out
Mouthful.
In running, keeping temperature is 320～360 DEG C to combustion furnace.
SO of the injector to generation in combustion furnace2When gas is absorbed, inspiratory capacity is 970-1500m3/h。
A kind of sulphur of the present invention is application of the sulfurous acid of raw material preparation in production of corn starch, is also institute of the present invention
Scope of protection.
The beneficial effects of the present invention is, by using above-mentioned sulfurous acid production system, by combustion furnace, acid storage tank, delaying
Rush tank, absorption tower and tail gas tower to connect by pipeline so as to become the entirety that a continuous production is processed, overcome it is existing will
Sulfur dioxide simply injects in industrial water and causes its process not easily-controllable or uncontrollable defect.By using above-mentioned sulfurous
Sour production system, effectively raises the treating capacity of sulphur, and amount 100-150kg/h for processing sulphur compared with conventional equipment increases to
250kg/h, the utilization rate for making sulphur has brought up to 99.5%, and tail gas SO from 70% or so2Content≤5mg/Nm3。
Description of the drawings
Fig. 1 is the structural representation of combustion furnace in the present invention；
Fig. 2 is the external structure schematic diagram of combustion furnace in the present invention；
Fig. 3 is the lateral plan of furnace interior in the present invention；
Fig. 4 is the internal structure schematic diagram of combustion furnace in the present invention；
Fig. 5 is the structural representation of the tray for combustion of the combustion furnace of the present invention；
In figure, 1- slag notches, 2- chucks, 3- bodies of heater, 4- dissolving casees, 5- fire doors, 6- supporting legs, 7- air outlets, 8- charge doors,
9- regulating valves, 10- shelves, 11- tray for combustions, 12- combustion chambers, 13- spout holes, 14- expansion chambers, 15- demarcation strip 16- combustion furnaces,
17- jet pumps, 18- acid storage tanks, 19- surge tanks, 20- sulfurous acid pumps, 21- circulating pumps, 22- absorption towers, 23- blower fans, 24- tail gas
Tower, 25- corrosion protection pumps, 26- injectors, 27- collecting boxs.
Specific embodiment
Come with reference to the accompanying drawings and detailed description to be further described the present invention, so as to the technology of this area
Personnel know more about the present invention, but with this do not limit the present invention.
Embodiment 1
As a example by sulfurous acid production process in produce cornstarch processing used by soaking corn：
In the method that sulphur prepares sulfurous acid as raw material, including following steps：
(1) fire door of combustion furnace is opened, solid sulfur is placed in tray for combustion, then thrown by the charge door of upper furnace
Enter fraction solids sulphur extremely to dissolve in case；Simultaneously water is added in acid storage tank, amount of water is acid storage tank volume in acid storage tank
Half；
(2) jet pump, blower fan are opened；
(3) sulfur dioxide gas for producing during sulfur burning are discharged by the air outlet of combustion furnace, are being connected with air outlet
Absorb to injector after cooling down at the smoke pipe for connecing；In running, keeping temperature is 350 DEG C or so to combustion furnace；Injection
SO of the device to generation in combustion furnace2When gas is absorbed, inspiratory capacity is 1200m3/ h or so；
(4) absorption tower and tail gas absorber process water valve are adjusted, to tail gas absorber process water is sprayed；To tail gas absorber
Spray process current liquid feeding alkali keeps pH >=10；
The tail gas in the circulating pump spray-absorption acid storage tank of absorption tower is opened, the valve below absorption tower is opened, buffering is kept
Tank liquid level equilibrium, makes sulfurous acid current toward in acid storage tank or surge tank, controls the concentration 0.18% or so of acid；
When acid storage tank sulfurous acid concentration 0.18% or so, sulfurous acid pump is opened out, close the valve opening that low level goes out acid
High-order goes out sour valve, and output products sulfurous acid is used in corn soaking to sour workshop, the sulfurous acid produced is stored up.
Sulfurous acid production system used in above method includes combustion furnace 16, and the combustion furnace 16 is connected with upper and lower two
Bypass line, superposed gas bypass line is connected with injector 26, and the injector 26 is connected with the top of acid storage tank 18,
Bypass line positioned at bottom is connected with the bottom of acid storage tank 18, there is jet pump 17 in the bypass line of bottom；
Process waterpipe is also associated between combustion furnace 16 and injector 26；
The top of acid storage tank 18 is connected with gas pipeline, and gas pipeline is divided into two bypass lines, the flue of tie point
Absorption tower 22, blower fan 23, tail gas tower 24 have been sequentially connected in series on road；Surge tank 19 is connected with the gas pipeline of the second branch road；Inhale
Receive and circulating pump 21 is connected with by pipeline between tower 22 and surge tank 19；
There is process waterpipe inside acid storage tank 18, process waterpipe is divided into two bypass lines, tie point pipeline and suction
Receive tower 22 to be connected, the second bypass line leads to surge tank 19, is connected by pipeline between the bottom of tail gas tower 24 and surge tank,
Pipeline and the second bypass line between the bottom of tail gas tower 24 and surge tank 19 is accumulated and lead to all the way surge tank 19；
The bottom of acid storage tank 18 is connected with and sulfurous acid product is delivered to into the sulfurous acid pump 20 and conveyance conduit of workshop acid tank；
The top of tail gas tower 24 is connected with two bypass lines, wherein being sequentially connected in series the He of corrosion protection pump 25 in a bypass line
Collecting box 27, the top of tail gas tower 24 is connected with another bypass line, and this two bypass lines are pooled together leads to surge tank
19。
Above-mentioned combustion furnace 16, including body of heater 3, fire door 5, slag notch 1, the combustion chamber 12 inside body of heater 3, combustion chamber
Tray for combustion 11 inside 12, having in air outlet 7, combustion chamber 12 on the roof of body of heater 3 of the top of slag notch 1 has two-layer tray for combustion 11,
This shape size of two-layer tray for combustion 11 is identical；This two-layer tray for combustion 11 is rectangle, and the surrounding of tray for combustion 11 has baffle plate；
Respectively there is a spout hole 13 at four angles of two-layer tray for combustion 11；
Discharge position under sulphur is being designed the forward part (near one end of fire door) in combustion furnace by the present invention, is easy to operator
Member is adjusted to baiting valve.Its purpose is to make liquid-state sulfur in guarantee tray for combustion 11 uniformly be paved with whole tray for combustion 11.
Four spout holes 13 of design, the high 16mm of front end spout hole, the high 6mm in rear end.Liquid-state sulfur is added after tray for combustion 11, first in blanking
Position is in gradually accumulation and to surrounding flowing, and front end spout hole 13 is highly slightly higher, is to ensure that liquid-state sulfur is fully left to rear end
Spout hole at, reach effect of four spout holes simultaneously overflow to the blanking of lower floor's tray for combustion 11.Ensure that tray for combustion 11 is whole simultaneously
Individual card is paved with sulphur, increases burning area.
Tray for combustion 11 is detachable connection with the inwall of combustion chamber 12, specifically, there is shelf 10 the inwall both sides of combustion chamber 12,
There is draw-in groove in shelf 10, tray for combustion 11 is flexibly connected with the shelf 10 of both sides by draw-in groove.
Upper top of the combustion chamber 12 near the side of fire door 5 has charge door 8, and there is dissolving case 4 lower section of charge door 8, and dissolving case 4 is matched somebody with somebody
The regulating valve 9 for control material flow is provided with, dissolving case 4 is connected with combustion chamber 12.
There is expansion chamber 14 between combustion chamber 12 and slag notch 1, expansion chamber 14 is located at the lower section of air outlet 7, has in expansion chamber 14
Demarcation strip 15, the top of demarcation strip 15 is connected with roof on combustion chamber 12, the foot of demarcation strip 15 and the inwall bottom of expansion chamber 14
It is not connected with.
Specifically, the foot of demarcation strip 15 and the distance of the bottom of the inwall of expansion chamber 14 are the 1/ of the total height of expansion chamber 14
8。
Demarcation strip 15 in expansion chamber 14 is made up of one piece of swash plate and one piece of vertical plate, and demarcation strip 15 is in " √ " shape, swash plate
Angle between vertical plate is 120 °.
Ratio of distances constant of the vertical plate of demarcation strip 15 away from the left side of expansion chamber 14 and right side is 2:1.
There is condensation water leg 2 outside body of heater 3, the topmost that the foot of chuck 2 has condensation water inlet, chuck 2 has condensation
Water out.
When sulfurous acid is produced, the fire door 5 of combustion furnace is opened, put into a part of raw material sulphur in upper and lower two-layer tray for combustion
In 11, light and start burning, in the process, sulphur is added by charge door 8 so as to dissolve in dissolving case 4, while opening
Regulating valve 9, in making the upper strata tray for combustion 11 that the Molten sulphur after dissolving is fallen in combustion chamber 12, the overflow on upper strata tray for combustion 11
By in part material overflow to lower floor's tray for combustion 11, the sulfur dioxide gas produced after burning enter expansion chamber 14, part in hole 13
Dirt slag falls into expansion chamber 14, and gas is advanced after the buffering of demarcation strip 15, discharged by air outlet 7, continued into next equipment
Production.Dirt slag in expansion chamber 14 is discharged by slag notch 1.
The design of tray for combustion number, can set, or three layers according to specific needs, or other layers
Number.
Annexation, or other movable connection methods between tray for combustion and shelf, similar conversion also falls
Within protection scope of the present invention.
Using common combustion furnace, per hour maximum treating capacity is 100-150kg sulphur；
Common combustion furnace processes sulphur, and its utilization rate is only 70% or so, and adopts the combustion furnace of the present invention, to sulphur
Utilization rate can reach 99.5%, tail gas SO2Content≤5mg/Nm3。
The combustion furnace of the present invention takes up an area small volume, and burning capacity is strong, in burning, it is ensured that combustion intensity is in 20～22kg/
m2Effect, it is to avoid sulphur is because of the too high generation sublimed sulfur of combustion intensity.
The present invention makes burning in-furnace temperature be maintained between 320～360 DEG C using jacket water (J.W.) cooling design, and flame is in indigo plant
Purple.As flame temperature is higher, then in reddish yellow even white, sublimed sulfur is just easily formed.
The production system and technique of the present invention adopts multistage absorption SO2Gas, improves SO2Absorptivity, using injector,
Absorption tower and tail gas absorber three-level absorb, and improve the uptake of sulfurous acid, greatly reduce the SO in emission2Gas contains
Amount.
Claims (9)
1. a kind of method that sulfurous acid is prepared as raw material with sulphur, including following steps：
(1) fire door of combustion furnace is opened, solid sulfur is placed in tray for combustion, then the charge door throw-in part for passing through upper furnace
Solid sulfur is divided extremely to dissolve in case；Simultaneously water is added in acid storage tank；
(2) jet pump, blower fan are opened；
(3) sulfur dioxide gas for producing during sulfur burning are discharged by the air outlet of combustion furnace, what is be connected with air outlet
Absorb to injector after cooling down at smoke pipe；
(4) absorption tower and tail gas absorber process water valve are adjusted, to tail gas absorber process water is sprayed；
The tail gas in the circulating pump spray-absorption acid storage tank of absorption tower is opened, the valve below absorption tower is opened, surge tank liquid is kept
Position balance, makes sulfurous acid current toward in acid storage tank or surge tank, controls concentration 0.15-0.2% of acid；
As acid storage tank sulfurous acid concentration 0.15-0.2%, sulfurous acid pump is opened out, close the valve opening high position that low level goes out acid
Go out sour valve, output products sulfurous acid is to storing up sour workshop.
2. a kind of method that sulfurous acid is prepared as raw material with sulphur as claimed in claim 1, it is characterised in that described step
(1) to the half that amount of water in acid storage tank is acid storage tank volume in.
3. a kind of as claimed in claim 1 method that sulfurous acid is prepared as raw material with sulphur, it is characterised in that described step
(4) pH >=10 are kept to tail gas absorber spray process current liquid feeding alkali in.
4. a kind of method that sulfurous acid is prepared as raw material with sulphur as claimed in claim 1, it is characterised in that described system
Including combustion furnace, described combustion furnace is connected with upper and lower two bypass lines, and superposed gas bypass line is connected with spray
Emitter, the injector is connected with acid storage tank top, and the bypass line positioned at bottom is connected with acid storage tank bottom, positioned at bottom
Bypass line on have jet pump；
Process waterpipe is also associated between described combustion furnace and injector；
Described acid storage tank top is connected with gas pipeline, and described gas pipeline is divided into two bypass lines, tie point
Absorption tower, blower fan, tail gas tower have been sequentially connected in series on gas pipeline；Surge tank is connected with the gas pipeline of the second branch road；It is described
Absorption tower and surge tank between circulating pump is connected with by pipeline；
There is process waterpipe inside described acid storage tank, process waterpipe is divided into two bypass lines, tie point pipeline and suction
Receive tower to be connected, lead to surge tank on the second branch road, be connected by pipeline between described tail gas tower bottom and surge tank, institute
Pipeline and the second bypass line between the tail gas tower bottom stated and surge tank accumulates pipeline all the way and leads to surge tank；
Described acid storage tank bottom is connected with and sulfurous acid product is delivered to into the sulfurous acid pump and conveyance conduit of workshop acid tank；
Described tail gas tower top is connected with two bypass lines, wherein being sequentially connected in series corrosion protection pump and receipts in a bypass line
Header, described tail gas tower top is connected with another bypass line, and this two bypass lines are pooled together leads to surge tank.
5. a kind of method that sulfurous acid is prepared as raw material with sulphur as claimed in claim 1, described combustion furnace include body of heater,
Fire door, slag notch, positioned at the combustion chamber of furnace interior, the tray for combustion of combustion chamber, the body of heater top above described slag notch
There is air outlet on wall, there is at least two-layer tray for combustion described burning interior, there are multiple spout holes on described tray for combustion.
6. a kind of method that sulfurous acid is prepared as raw material with sulphur as claimed in claim 2, it is characterised in that described burning
There is shelf chamber interior walls both sides, there is draw-in groove in described shelf, and described tray for combustion is flexibly connected with the shelf of both sides by draw-in groove；
Described tray for combustion has two-layer, and described two-layer tray for combustion shape size is identical, and described two-layer tray for combustion is
Rectangle, tray for combustion surrounding has baffle plate；Respectively there is a spout hole at four angles of the two-layer tray for combustion, it is close in two-layer tray for combustion
The height of two spout holes of one end of fire door is 2-3 times of two spout hole height away from fire door one end；
Upper top of the described combustion chamber near fire door side has charge door, and there is dissolving case charge door lower section, and dissolving case is equipped
For the regulating valve of control material flow, dissolving case and combustion chamber；
There is expansion chamber between described combustion chamber and slag notch, described expansion chamber is located at air outlet lower section, described expansion chamber
Inside there is demarcation strip, described demarcation strip top is connected with roof on combustion chamber, demarcation strip foot and sedimentation chamber interior walls bottom
It is not connected with；
The foot of described demarcation strip and the 1/10-1/4 that the distance of the bottom of sedimentation chamber interior walls is expansion chamber total height；
The indoor demarcation strip of described sedimentation is made up of one piece of swash plate and one piece of vertical plate, and demarcation strip is in " √ " shape, swash plate with it is perpendicular
Angle between straight panel is 110-140 °；
Ratio of distances constant of the vertical plate of described demarcation strip away from expansion chamber both sides is 1:1-3；
There is condensation water leg outside described body of heater, the topmost that the foot of chuck has condensation water inlet, chuck has condensed water
Outlet.
7. a kind of method that sulfurous acid is prepared as raw material with sulphur as claimed in claim 2, it is characterised in that described burning
In running, keeping temperature is 320～360 DEG C to stove.
8. a kind of method that sulfurous acid is prepared as raw material with sulphur as claimed in claim 2, it is characterised in that described injection
SO of the device to generation in combustion furnace2When gas is absorbed, inspiratory capacity is 970-1500m3/h。
9. a kind of sulphur as claimed in claim 1 is application of the sulfurous acid of raw material preparation in production of corn starch.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201611082486.3A CN106629627B (en) | 2016-11-30 | 2016-11-30 | The method for preparing sulfurous acid as raw material using sulphur |
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| CN201611082486.3A CN106629627B (en) | 2016-11-30 | 2016-11-30 | The method for preparing sulfurous acid as raw material using sulphur |
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| CN106629627A true CN106629627A (en) | 2017-05-10 |
| CN106629627B CN106629627B (en) | 2019-01-08 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112794290A (en) * | 2021-02-26 | 2021-05-14 | 中冶焦耐(大连)工程技术有限公司 | Process and system for treating low-quality sulfur and secondary salt waste liquid produced by coke oven gas desulfurization |
| CN112794282A (en) * | 2021-02-06 | 2021-05-14 | 西安热工研究院有限公司 | System and method for producing hydrogen by using sulfur-containing flue gas of boiler |
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| CN201101101Y (en) * | 2007-10-18 | 2008-08-20 | 吴英克 | Environment protection energy-saving high-efficiency sugar manufacturing sulphur kiln |
| CN202089770U (en) * | 2011-05-30 | 2011-12-28 | 河南巨龙生物工程股份有限公司 | Sulphurous acid preparation device |
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| CN201101101Y (en) * | 2007-10-18 | 2008-08-20 | 吴英克 | Environment protection energy-saving high-efficiency sugar manufacturing sulphur kiln |
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| CN104944382A (en) * | 2015-05-25 | 2015-09-30 | 济南阜丰宏发机械有限公司 | Closed multistage absorption system for preparing sulfurous acid from sulfur dioxide |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112794282A (en) * | 2021-02-06 | 2021-05-14 | 西安热工研究院有限公司 | System and method for producing hydrogen by using sulfur-containing flue gas of boiler |
| CN112794290A (en) * | 2021-02-26 | 2021-05-14 | 中冶焦耐(大连)工程技术有限公司 | Process and system for treating low-quality sulfur and secondary salt waste liquid produced by coke oven gas desulfurization |
| CN112794290B (en) * | 2021-02-26 | 2023-09-19 | 中冶焦耐(大连)工程技术有限公司 | Process and system for treating low-quality sulfur and side salt waste liquid of coke oven gas desulfurization product |
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| CN106629627B (en) | 2019-01-08 |
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Denomination of invention: Method for preparing sulfite with sulfur as raw material Effective date of registration: 20211221 Granted publication date: 20190108 Pledgee: China Construction Bank Corporation Zouping sub branch Pledgor: SHANDONG XIWANG SUGAR INDUSTRY Co.,Ltd. Registration number: Y2021980015836 |
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