CN106629627B - The method for preparing sulfurous acid as raw material using sulphur - Google Patents
The method for preparing sulfurous acid as raw material using sulphur Download PDFInfo
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- CN106629627B CN106629627B CN201611082486.3A CN201611082486A CN106629627B CN 106629627 B CN106629627 B CN 106629627B CN 201611082486 A CN201611082486 A CN 201611082486A CN 106629627 B CN106629627 B CN 106629627B
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- 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 chemical fields, and in particular to a method of sulfurous acid is prepared by raw material of sulphur, further relates to the application of above-mentioned method sulfurous acid product produced.The method of the present invention includes following steps: opening the fire door of combustion furnace, solid sulfur is placed in tray for combustion, then put into part solid sulfur into dissolution case by the feed opening of upper furnace；Water is added in acid storage tank simultaneously, opens jet pump, blower, the air door of combustion furnace；The sulfur dioxide gas generated when sulfur burning is discharged by air outlet, is absorbed after cooling down at the smoke pipe being connected with air outlet to injector；Absorption tower and tail gas absorber process water valve are adjusted, corrosion protection pump is opened to tail gas absorber and sprays process water.By using above-mentioned sulfurous acid production system, the treating capacity of sulphur is effectively raised, the amount 100-150kg/h compared with conventional equipment processing sulphur increases to 250kg/h, and the utilization rate of sulphur is made to be increased to 99.5%, and tail gas SO from 70% or so2Content≤5mg/Nm3。
Description
Technical field
The invention belongs to chemical fields, and in particular to a method of sulfurous acid is prepared by raw material of sulphur.
Background technique
, need to be to corn soaking in production of corn starch process, raw material used by impregnating is food grade sulfurous acid, mesh
Preceding maize production enterprise is not easy to buy the sulfur dioxide of the food grade for producing sulfurous acid on the market, even if Some Enterprises
Outsourcing obtains food grade sulfur dioxide, and sulfur dioxide is injected in industrial water, and the sulfurous acid that preparation meets production requirement is used for
In the immersion of cornstarch, but the sulfur dioxide bought not very meets country since its production process is not easily-controllable or uncontrollable
Related regulation, therefore this method is eliminated.
Maize production enterprise buys food grade sulphur, carries out burning and generates sulfur dioxide, prepares sulfurous acid with water absorption, should
The defect of method is that the existing maximum burning capacity of sulphur stove is 100-150kg/h, with the increase of quantity combusted, combustion
It burns the temperature in furnace necessarily also to increase, burning in-furnace temperature is excessively high, sulphur can be made to distil, cannot efficiently used.
Therefore, it is necessary to improve for above-mentioned defect, to preparing the method for sulfurous acid as raw material using sulphur and be
System all improves, and the sulfurous acid quality for producing this method meets the requirement of institute of enterprise converted products, and make design is
The phenomenon that system avoids sulphur distillation that from cannot being used effectively using raw material sulphur to greatest extent.
Summary of the invention
In order to solve the above technical problems, can make the present invention provides a kind of with sulphur raw material production sulfurous acid
In the process, the method that can effectively improve sulphur utilization rate, and meet the sulfurous acid produced needed for corn soaking；
The method for preparing sulfurous acid as raw material using sulphur of the invention, includes the steps that following:
(1) fire door for opening combustion furnace, solid sulfur is placed in tray for combustion, then is thrown by the feed opening of upper furnace
Enter fraction solids sulphur into dissolution case；Water is added in acid storage tank simultaneously,
(2) jet pump, blower are opened；
(3) sulfur dioxide gas generated when sulfur burning is discharged by the air outlet of combustion furnace, is connected with air outlet
It is absorbed after cooling down to injector at the smoke pipe connect；
(4) absorption tower and tail gas absorber process water valve are adjusted, sprays process water to tail gas absorber；
The tail gas in absorption tower circulating pump spray-absorption acid storage tank is opened, the valve below absorption tower is opened, keeps buffering
Tank liquid level equilibrium makes sulfurous acid water flow in acid storage tank or surge tank, controls the concentration 0.15-0.2% of acid；
As acid storage tank sulfurous acid concentration 0.15-0.2%, sulfurous acid pump is opened out, closes the valve opening that low level goes out acid
High-order goes out sour valve, output products sulfurous acid to the sour workshop of storage.
Into acid storage tank, amount of water is the half of acid storage tank volume in above-mentioned step (1).
PH >=10 are kept to tail gas absorber spray process water flow liquid feeding alkali in above-mentioned step (4).
Sulphur employed in the present invention is that raw material prepares sulfurous acid production system used in sulfurous acid, and system includes burning
Furnace, combustion furnace are connected with two bypass lines up and down, and superposed gas bypass line is connected with injector, the injector with
Acid storage tank top is connected, and the bypass line positioned at lower part is connected with acid storage tank lower part, has in the bypass line of lower part
Jet pump；
Process waterpipe is also connected between combustion furnace and injector；
It is connected with gas pipeline at the top of acid storage tank, gas pipeline is divided into two bypass lines, the gas pipeline of the first branch
On be sequentially connected in series absorption tower, blower, tail gas tower；Surge tank is connected on the gas pipeline of second branch；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, first branch pipeline and absorption
Tower is connected, and surge tank is led in second branch, is connected between tail gas tower lower part and surge tank by pipeline, tail gas tower lower part
Pipeline and second branch pipe influx between surge tank lead to surge tank at pipeline all the way；
Acid storage tank bottom is connected with and send sulfurous acid product to 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 are connected with another bypass line, this two bypass lines, which pool together, leads to surge tank.
Sulphur is that raw material prepares sulfurous acid production system used in sulfurous acid, and combustion furnace includes furnace body, fire door, slag notch,
Positioned at the combustion chamber of furnace interior, the tray for combustion of combustion chamber has air outlet, combustion chamber on the furnace body roof above slag notch
Inside there is at least two layers of tray for combustion, there are multiple overflow holes on tray for combustion.
There are shelf in Inner Wall of Combustion Chamber two sides, there is card slot in shelf, and tray for combustion is flexibly connected with the shelf of two sides by card slot；
Tray for combustion has two layers, and two layers of tray for combustion shape size is identical, and two layers of tray for combustion is rectangle, tray for combustion surrounding
There is baffle；Respectively there is an overflow hole at four angles of two layers of tray for combustion, two of one end of close fire door are overflow in two layers of tray for combustion
The height of discharge orifice is 2-3 times of two overflow hole height far from fire door one end；
Upper top of the combustion chamber close to fire door side has feed opening, there is dissolution case below feed opening, and dissolution case is arranged useful
In the regulating valve of control mass flow, case and combustion chamber are dissolved；
There is expansion chamber between combustion chamber and slag notch, expansion chamber is located at below air outlet, has demarcation plate in expansion chamber, separates
Plate top is connected with roof on combustion chamber, and demarcation plate lowest part is not connected with sedimentation chamber interior walls bottom；
The lowest part of demarcation plate is the 1/10-1/4 of expansion chamber total height at a distance from the bottom of sedimentation chamber interior walls；
It settles indoor demarcation plate to be made of one piece of inclined plate and one piece of vertical plate, demarcation plate is in " √ " shape, inclined plate and vertical
Angle between plate is 110 ° -140 °；
Ratio of distances constant of the vertical plate of demarcation plate away from expansion chamber two sides is 1:1-3；
There is condensation water leg outside furnace body, the lowest part of collet has condensation water inlet, and the topmost of collet has condensed water to go out
Mouthful.
In the process of running, keep temperature is 320~360 DEG C to combustion furnace.
Injector is to the SO generated in combustion furnace2When gas is absorbed, inspiratory capacity 970-1500m3/h。
A kind of sulphur of the invention is application of the sulfurous acid of raw material preparation in production of corn starch, and institute of the present invention
Scope of protection.
The beneficial effects of the present invention are by combustion furnace, acid storage tank, delay by using above-mentioned sulfurous acid production system
It rushes tank, absorption tower to connect with tail gas tower by pipeline, becomes the entirety of continuous production processing, overcome existing incite somebody to action
Sulfur dioxide, which simply injects in industrial water, makes its process not easily-controllable or uncontrollable defect.By using above-mentioned sulfurous
Sour production system effectively raises the treating capacity of sulphur, and the amount 100-150kg/h compared with conventional equipment processing sulphur increases to
250kg/h makes the utilization rate of sulphur be increased to 99.5%, and tail gas SO from 70% or so2Content≤5mg/Nm3。
Detailed description of the invention
Fig. 1 is the structural schematic diagram 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 schematic diagram of internal structure of combustion furnace in the present invention；
Fig. 5 is the structural schematic diagram of the tray for combustion of combustion furnace of the invention；
In figure, 1- slag notch, 2- collet, 3- furnace body, 4- dissolution case, 5- fire door, 6- supporting leg, 7- air outlet, 8- feed opening,
9- regulating valve, 10- shelf, 11- tray for combustion, the combustion chamber 12-, 13- overflow hole, 14- expansion chamber, 15- demarcation plate 16- combustion furnace,
17- jet pump, 18- acid storage tank, 19- surge tank, 20- sulfurous acid pump, 21- circulating pump, the absorption tower 22-, 23- blower, 24- tail gas
Tower, 25- corrosion protection pump, 26- injector, 27- collecting box.
Specific embodiment
Next with reference to the accompanying drawings and detailed description the present invention will be further explained, so as to the technology of this field
Personnel know more about the present invention, but do not limit the present invention with this.
Embodiment 1
To produce in cornstarch processing for sulfurous acid production process used in soaking corn:
In the method that sulphur prepares sulfurous acid as raw material, include the steps that following:
(1) fire door for opening combustion furnace, solid sulfur is placed in tray for combustion, then is thrown by the feed opening of upper furnace
Enter fraction solids sulphur into dissolution case；Water is added in acid storage tank simultaneously, amount of water is acid storage tank volume into acid storage tank
Half；
(2) jet pump, blower are opened；
(3) sulfur dioxide gas generated when sulfur burning is discharged by the air outlet of combustion furnace, is connected with air outlet
It is absorbed after cooling down to injector at the smoke pipe connect；In the process of running, keep temperature is 350 DEG C or so to combustion furnace；Injection
Device is to the SO generated in combustion furnace2When gas is absorbed, inspiratory capacity 1200m3/ h or so；
(4) absorption tower and tail gas absorber process water valve are adjusted, sprays process water to tail gas absorber；To tail gas absorber
Spray process water flow liquid feeding alkali keeps pH >=10；
The tail gas in absorption tower circulating pump spray-absorption acid storage tank is opened, the valve below absorption tower is opened, keeps buffering
Tank liquid level equilibrium makes sulfurous acid water flow 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, closes the valve opening that low level goes out acid
High-order goes out sour valve, and output products sulfurous acid is to sour workshop is stored up, and the sulfurous acid produced is in corn soaking.
Used sulfurous acid production system includes combustion furnace 16 in above method, which is connected with two up and down
Bypass line, superposed gas bypass line are connected with injector 26, which is connected with 18 top of acid storage tank,
Bypass line positioned at lower part is connected with 18 lower part of acid storage tank, there is jet pump 17 in the bypass line of lower part；
Process waterpipe is also connected between combustion furnace 16 and injector 26；
Gas pipeline is connected at the top of acid storage tank 18, gas pipeline is divided into two bypass lines, the flue of the first branch
Absorption tower 22, blower 23, tail gas tower 24 have been sequentially connected in series on road；Surge tank 19 is connected on the gas pipeline of second branch；It inhales
It receives 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, first branch pipeline and suction
Tower 22 to be received to be connected, second branch pipeline leads to surge tank 19, it is connected between 24 lower part of tail gas tower and surge tank by pipeline,
Pipeline between 24 lower part of tail gas tower and surge tank 19 and second branch pipe influx at leading to surge tank 19 all the way；
18 bottom of acid storage tank is connected with and send the sulfurous acid to workshop acid tank to pump 20 and conveyance conduit sulfurous acid product；
24 top of tail gas tower is connected with two bypass lines, wherein being sequentially connected in series 25 He of corrosion protection pump in a bypass line
Collecting box 27,24 top of tail gas tower are connected with another bypass line, this two bypass lines, which pool together, leads to surge tank
19。
Above-mentioned combustion furnace 16, including furnace body 3, fire door 5, slag notch 1, the combustion chamber 12 inside furnace body 3, combustion chamber
Tray for combustion 11 inside 12 has air outlet 7 on 3 roof of furnace body of the top of slag notch 1, there is two layers of tray for combustion 11 in combustion chamber 12,
This two layers of tray for combustion, 11 shape size is identical；This two layers of tray for combustion 11 is rectangle, and 11 surrounding of tray for combustion has baffle；
Respectively there is an overflow hole 13 at four angles of two layers of tray for combustion 11；
The present invention is designing discharge position under sulphur in the preceding part (close to one end of fire door) of combustion furnace, is convenient for operator
Baiting valve is adjusted in member.Its purpose is to make to guarantee that liquid-state sulfur is uniformly paved with entire tray for combustion 11 in tray for combustion 11.
Design four overflow holes 13, the high 16mm of front end overflow hole, the high 6mm in rear end.After tray for combustion 11 is added in liquid-state sulfur, first in blanking
Position is in and is gradually accumulated and flows around, and overflow hole 13 height in front end is slightly higher, to guarantee that liquid-state sulfur is sufficiently left to rear end
Overflow hole at, achieve the effect that the overflow simultaneously of four overflow holes to 11 blanking of lower layer's tray for combustion.Guarantee that tray for combustion 11 is whole simultaneously
A disk is paved with sulphur, increases burning area.
Tray for combustion 11 and 12 inner wall of combustion chamber are detachable connection, specifically, there are shelf 10 in 12 inner wall two sides of combustion chamber,
There is card slot in shelf 10, tray for combustion 11 is flexibly connected with the shelf 10 of two sides by card slot.
Upper top of the combustion chamber 12 close to 5 side of fire door has feed opening 8, there is dissolution case 4 below feed opening 8, and dissolution case 4 is matched
Equipped with the regulating valve 9 for controlling mass flow, dissolves case 4 and be connected with combustion chamber 12.
There is expansion chamber 14 between combustion chamber 12 and slag notch 1, expansion chamber 14 is located at 7 lower section of air outlet, has in expansion chamber 14
Demarcation plate 15,15 top of demarcation plate are connected with roof on combustion chamber 12,15 lowest part of demarcation plate and 14 inner wall bottom of expansion chamber
It is not connected with.
Specifically, the lowest part of demarcation plate 15 is the 1/ of 14 total height of expansion chamber at a distance from the bottom of 14 inner wall of expansion chamber
8。
Demarcation plate 15 in expansion chamber 14 is made of one piece of inclined plate and one piece of vertical plate, and demarcation plate 15 is in " √ " shape, inclined plate
Angle between vertical plate is 120 °.
Ratio of distances constant of the vertical plate of demarcation plate 15 away from 14 left and right side of expansion chamber is 2:1.
There is condensation water leg 2 outside furnace body 3, the lowest part of collet 2 has condensation water inlet, and the topmost of collet 2 has condensation
Water out.
When producing sulfurous acid, the fire door 5 of combustion furnace is opened, puts into a part of raw material sulphur in upper layer and lower layer tray for combustion
It in 11, lights and starts to burn, in the process, sulphur is added by feed opening 8, dissolves it in dissolution case 4, open simultaneously
Regulating valve 9, in the upper layer tray for combustion 11 for falling into dissolved Molten sulphur in combustion chamber 12, the overflow on upper layer tray for combustion 11
By part material overflow into lower layer's tray for combustion 11, the sulfur dioxide gas generated after burning enters expansion chamber 14, part in hole 13
Dirt slag falls into expansion chamber 14, and gas is advanced after being buffered by demarcation plate 15, is discharged by air outlet 7, continues into next equipment
Production.Dirt slag in expansion chamber 14 is discharged by slag notch 1.
The design of tray for combustion number can be set according to specific needs, be also possible to three layers, or other layers
Number.
Connection relationship between tray for combustion and shelf, is also possible to other movable connection methods, and similar transformation is also fallen
Within protection scope of the present invention.
Using common combustion furnace, maximum treating capacity is 100-150kg sulphur per hour；
Common combustion furnace handles sulphur, and utilization rate is only 70% or so, and uses combustion furnace of the invention, to sulphur
Utilization rate can reach 99.5%, tail gas SO2Content≤5mg/Nm3。
Combustion furnace land occupation of the invention is small in size, and burning capacity is strong, in burning, guarantees combustion intensity in 20~22kg/
m2Effect, avoid sulphur because of the excessively high generation sublimed sulfur of combustion intensity.
The present invention is maintained at burning in-furnace temperature between 320~360 DEG C, flame is in indigo plant using jacket water (J.W.) cooling design
Purple.If flame temperature is higher, then in reddish yellow even white, sublimed sulfur is just easily formed.
Production system and technique of the invention uses 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 (7)
1. a kind of method for preparing sulfurous acid as raw material using sulphur, includes the steps that following:
(1) fire door for opening combustion furnace, solid sulfur is placed in tray for combustion, then passes through the feed opening throw-in part of upper furnace
Divide solid sulfur into dissolution case；Water is added in acid storage tank simultaneously；
(2) jet pump, blower are opened；
(3) sulfur dioxide gas generated when sulfur burning is discharged by the air outlet of combustion furnace, what is be connected with air outlet
It is absorbed after cooling down to injector at smoke pipe；
(4) absorption tower and tail gas absorber process water valve are adjusted, sprays process water to tail gas absorber；
The tail gas in absorption tower circulating pump spray-absorption acid storage tank is opened, the valve below absorption tower is opened, keeps surge tank liquid
Position balance, makes sulfurous acid water flow in acid storage tank or surge tank, controls the concentration 0.15-0.2% of acid；
As acid storage tank sulfurous acid concentration 0.15-0.2%, sulfurous acid pump is opened out, the valve that closing low level goes out acid is opened high-order
Sour valve out, output products sulfurous acid to the sour workshop of storage；
System used in the above method includes combustion furnace, and the combustion furnace is connected with two bypass lines up and down, is located at upper
The gas bypass line in portion is connected with injector, which is connected with acid storage tank top, positioned at lower part bypass line with
Acid storage tank lower part is connected, and has jet pump in the bypass line of lower part；
Process waterpipe is also connected between the combustion furnace and injector；
It is connected with gas pipeline at the top of the acid storage tank, the gas pipeline is divided into two bypass lines, the first branch
Absorption tower, blower, tail gas tower have been sequentially connected in series on gas pipeline；Surge tank is connected on the gas pipeline of second branch；It is described
Absorption tower and surge tank between circulating pump is connected with by pipeline；
There is process waterpipe inside the acid storage tank, process waterpipe is divided into two bypass lines, first branch pipeline and suction
It receives tower to be connected, surge tank is led in second branch, is connected between the tail gas tower lower part and surge tank by pipeline, institute
Pipeline and second branch pipe influx between the tail gas tower lower part stated and surge tank lead to surge tank at pipeline all the way；
The acid storage tank bottom is connected with and send sulfurous acid product to the sulfurous acid pump and conveyance conduit of workshop acid tank；
The 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, the tail gas tower top are connected with another bypass line, this two bypass lines, which pool together, leads to surge tank.
2. a kind of method for preparing sulfurous acid as raw material using sulphur as described in claim 1, which is characterized in that the step
(1) into acid storage tank, amount of water is the half of acid storage tank volume in.
3. a kind of method for preparing sulfurous acid as raw material using sulphur as described in claim 1, which is characterized in that the step
(4) pH >=10 are kept to tail gas absorber spray process water flow liquid feeding alkali in.
4. a kind of method for preparing sulfurous acid as raw material using sulphur as described in claim 1, the combustion furnace include furnace body,
Fire door, slag notch, positioned at the combustion chamber of furnace interior, the tray for combustion of combustion chamber, the furnace body top above the slag notch
There is air outlet on wall, has at least two layers of tray for combustion in the combustion chamber, there are multiple overflow holes on the tray for combustion.
5. a kind of method for preparing sulfurous acid as raw material using sulphur as claimed in claim 4, which is characterized in that the burning
There are shelf in chamber interior walls two sides, there is card slot in the shelf, and the tray for combustion is flexibly connected with the shelf of two sides by card slot；
The tray for combustion has two layers, and two layers of tray for combustion shape size is identical, and two layers of tray for combustion is
Rectangle, tray for combustion surrounding have baffle；Respectively there is an overflow hole at four angles of two layers of tray for combustion, it is close in two layers of tray for combustion
The height of two overflow holes of one end of fire door is 2-3 times of two overflow hole height far from fire door one end；
Upper top of the combustion chamber close to fire door side has feed opening, there is dissolution case below feed opening, and dissolution case is equipped
For controlling the regulating valve of mass flow, case and combustion chamber are dissolved；
There is expansion chamber between the combustion chamber and slag notch, the expansion chamber is located at below air outlet, the expansion chamber
Inside there is demarcation plate, the demarcation plate top is connected with roof on combustion chamber, demarcation plate lowest part and sedimentation chamber interior walls bottom
It is not connected with；
The lowest part of the demarcation plate is the 1/10-1/4 of expansion chamber total height at a distance from the bottom of sedimentation chamber interior walls；
The indoor demarcation plate of the sedimentation is made of one piece of inclined plate and one piece of vertical plate, and demarcation plate is in " √ " shape, inclined plate and perpendicular
Angle between straight panel is 110-140 °；
Ratio of distances constant of the vertical plate of the demarcation plate away from expansion chamber two sides is 1:1-3；
There is condensation water leg outside the furnace body, the lowest part of collet has condensation water inlet, and the topmost of collet has condensed water
Outlet.
6. a kind of method for preparing sulfurous acid as raw material using sulphur as claimed in claim 2, which is characterized in that the burning
In the process of running, keep temperature is 320~360 DEG C to furnace.
7. a kind of method for preparing sulfurous acid as raw material using sulphur as claimed in claim 2, which is characterized in that the injection
Device is to the SO generated in combustion furnace2When gas is absorbed, inspiratory capacity 970-1500m3/h。
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| 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 |
| 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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| 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 |
| CN104944382B (en) * | 2015-05-25 | 2017-07-28 | 济南阜丰宏发机械有限公司 | A kind of closed circuit multistage absorption system of sulfur dioxide sulfurous acid |
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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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