CN209501332U - The system of reducing substances in carbide slag slurry is removed in carbide slag sulfur removal technology - Google Patents
The system of reducing substances in carbide slag slurry is removed in carbide slag sulfur removal technology Download PDFInfo
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- CN209501332U CN209501332U CN201821941025.1U CN201821941025U CN209501332U CN 209501332 U CN209501332 U CN 209501332U CN 201821941025 U CN201821941025 U CN 201821941025U CN 209501332 U CN209501332 U CN 209501332U
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- carbide slag
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- dioxygen water
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Abstract
The utility model discloses the systems that reducing substances in carbide slag slurry are removed in a kind of carbide slag sulfur removal technology, the carbide slag sulfur removal technology includes desulfuration absorbing tower, circulation pipe and circulating pump, the entrance of circulation pipe is connected to the lower part of desulfuration absorbing tower, it exports and is connected to the slurry nozzle being arranged at the top of desulfuration absorbing tower, circulating pump is for driving loop slurry to be flowed from circulation tube inlet one end to exit end, the system includes carbide slag slurries liquid pipeline and dioxygen water lines, carbide slag slurries liquid pipeline and dioxygen water lines are respectively used to that carbide slag slurry and hydrogen peroxide are added into circulation pipe.Hydrogen peroxide and carbide slag slurry are added in loop slurry together, come into full contact with loop slurry mix during, utilize the reducing substances that water is dissolved in hydrogen peroxide oxidation carbide slag slurry, the phenomenon that so as to avoid reducing substances from contacting with desulfurization product calcium sulfite and be wrapped in its surface, cause calcium sulfite oxidation overlong time that can not even aoxidize.
Description
Technical field
The utility model relates to remove carbide slag slurry in flue gas desulfurization technique field more particularly to carbide slag sulfur removal technology
The system of middle reducing substances.
Background technique
Domestic calcium carbide production acetylene chemical company can all have a large amount of carbide slag to generate every year, and long-term air storage can pollute
Environment, while a large amount of valuable land resource is also occupied, waste carbide slag stacking need to pay a large amount of row to environmental protection administration every year
It is dirty to take, have become the obstacle for restricting chemical industry development.Since the main component of carbide slag is calcium hydroxide, can replace
Lime makees desulfurizing agent for means of flue gas desulfurization of power plant, product can aerating oxidation desulfurized gypsum be further made realize recycling benefit
With.
Contain many impurity, such as sulfide, phosphide and the substance SiO for easily forming colloidal attitude in carbide slag slurries2And
Iron, magnesium, oxide of aluminium etc., these impurity will affect the shapes and sizes of gypsum crystal, they can preferentially in conjunction with oxygen and
It is oxidized；In addition, the metal oxide in carbide slag may wrap up calcium sulfite, contact of the calcium sulfite with oxygen is influenced,
These factors will lead to that the calcium sulfite reactivity formed after desulfurization is poor, and the difficulty that oxidation process is completed in desulfurizing tower is larger.
Therefore, the oxidation technology of carbide slag desulfurization at present is flue gas desulfurization research direction and technology trends.
Utility model content
The technical problem to be solved by the utility model is to provide remove carbide slag slurry in a kind of carbide slag sulfur removal technology
The system of middle reducing substances, to improve the efficiency of calcium sulfite oxidation after desulfurization.
The technical scheme adopted by the utility model to solve the technical problem is as follows: removing electricity in a kind of carbide slag sulfur removal technology
The system of reducing substances in rock ballast slurries, the carbide slag sulfur removal technology include desulfuration absorbing tower, circulation pipe and circulation
Pump, the entrance of the circulation pipe are connected to the lower part of the desulfuration absorbing tower, are exported and are arranged at the top of desulfuration absorbing tower
Slurry nozzle connection, the circulating pump are described for driving loop slurry to be flowed from circulation tube inlet one end to exit end
System include carbide slag slurries liquid pipeline and dioxygen water lines, carbide slag slurries liquid pipeline and dioxygen water lines are respectively used to described
Carbide slag slurry and hydrogen peroxide are added in circulation pipe.
Further, the position that the carbide slag slurries liquid pipeline and dioxygen water lines are connected to the circulation pipe is respectively positioned on
Before the feed inlet of the circulating pump.
Further, the carbide slag slurries liquid pipeline and the outlet ends of dioxygen water lines are respectively positioned on the circulating pump
The centerline of feed pipe.
Further, carbide slag regulating valve and carbide slag flowmeter are provided on the carbide slag slurries liquid pipeline；It is described
Dioxygen water lines on be provided with dioxygen water regulating valve and dioxygen water ga(u)ge；Wherein, the aperture of the dioxygen water regulating valve is big
It is small dynamically to be adjusted with the variation of the flow value of carbide slag flowmeter acquisition.
Hydrogen peroxide and carbide slag slurry are added in loop slurry the utility model together, come into full contact with loop slurry
During mixing, using reducing substances soluble in water in hydrogen peroxide oxidation carbide slag slurry, hydrogen peroxide, carbide slag later
Slurries are sprayed with loop slurry by slurry nozzle again, are come into full contact with the sulfur dioxide in flue gas, are achieved the purpose that desulfurization,
The main component calcium hydroxide of carbide slag slurry can react generation calcium sulfite in sweetening process, and calcium sulfite obtains after aoxidizing again
To calcium sulfate.Since the reducing substances in carbide slag slurry are in advance by hydrogen peroxide oxidation, it is possible to avoid reproducibility object
Matter contacts with desulfurization product calcium sulfite and is wrapped in calcium sulfite surface, causes calcium sulfite oxidation overlong time even can not
The phenomenon that oxidation, occurs.
The beneficial effects of the utility model are: can be improved de- after using the reducing substances in hydrogen peroxide oxidation carbide slag
The oxidation efficiency of sulphur rear slurry, the oxidation efficiency of calcium sulfite can achieve 85% or more, and the gypsum of production is aqueous averagely to exist
15%, it can be used as product and sold, on the one hand can bring economic benefit for enterprise, on the other hand can turn waste into wealth,
It realizes that resource comprehensive recycles, promotes industry clean manufacturing, developing crcycle economy.
Detailed description of the invention
Fig. 1 is that the structure of the system of reducing substances in a kind of removal carbide slag desulfurization slurry provided by the utility model is shown
It is intended to；
Fig. 2 is the enlarged drawing in Fig. 1 at A；
In the figure, it is marked as 1- flue, 2- desulfuration absorbing tower, 3- pump inlet switch valve, 4- feed pipe, 5- circulation
Pump, 6- circulation pipe, 7- slurry nozzle, 8- carbide slag regulating valve, 9- carbide slag flowmeter, 10- carbide slag slurries liquid pipeline, 11- are bis-
Oxygen water regulating valve, 12- dioxygen water ga(u)ge, 13- dioxygen water lines.
Specific embodiment
The utility model is described in further detail combined with specific embodiments below, but the embodiment party of the utility model
Formula is without being limited thereto.
The utility model provides a kind of method that reducing substances in carbide slag slurry are removed in carbide slag sulfur removal technology,
The carbide slag sulfur removal technology is recycled in desulfuration absorbing tower as desulfurizing agent with loop slurry using carbide slag slurry, with right
Flue gas carries out desulfurization, and the method includes the following steps:
Hydrogen peroxide is also added in loop slurry while the loop slurry is added in the carbide slag slurry, to
Aoxidize the reducing substances in carbide slag slurry.
In order to guarantee that the dioxygen water energy being added is sufficiently mixed with carbide slag slurry, contacts, to ensure reducing substances by oxygen
Change more thoroughly, following optimization design can be carried out: (1) carbide slag slurry and hydrogen peroxide by desulfuration absorbing tower circulating pump
Feed inlet before be added into loop slurry；(2) and calcium carbide slurries and hydrogen peroxide are added by respective pipeline to institute respectively
At the die for stating the feed pipe of circulating pump.
In addition, the variation according to sulfur dioxide in flue gas content, the amount for the carbide slag slurry being added also needs to occur therewith
Variation, and in order to ensure the reducing substances in carbide slag slurry can be substantially oxidized, so needing to guarantee the addition of hydrogen peroxide
Amount can be with the variation of the additional amount of carbide slag slurry and dynamic adjusts, and to ensure the proportions constant of the two, avoids the occurrence of due to double
Reducing substances aoxidize insufficient phenomenon caused by oxygen water is insufficient.
Fig. 1 shows to remove in a kind of carbide slag sulfur removal technology designed according to the above method and restore in carbide slag slurry
The system of property substance, the carbide slag sulfur removal technology includes desulfuration absorbing tower 2, circulation pipe 6 and circulating pump 5, the circulation
The entrance of pipe 6 is connected to the lower part of the desulfuration absorbing tower 2, exports and be arranged in the slurry nozzle 7 in 2 top of desulfuration absorbing tower
Connection, the circulating pump 5 is for driving loop slurry to be flowed from 6 entrance one end of circulation pipe to exit end, the system
Including carbide slag slurries liquid pipeline 10 and dioxygen water lines 13, carbide slag slurries liquid pipeline 10 and dioxygen water lines 13 are respectively used to institute
It states and carbide slag slurry and hydrogen peroxide is added in circulation pipe 6.
The ingredient of carbide slag slurry is very complicated, and there are Al3+, Mg2+, Fe3+, S2-, SO4 2-, P3-Equal impurity, and mutual shadow
It rings, especially S2-It can be preferentially oxidized in conjunction with oxygen, while can also wrap up calcium sulfite, influence calcium sulfite and oxygen
Contact, and then inhibit the oxidation of calcium sulfite, cause the yield and quality of desulfurized gypsum bad.
The utility model is using hydrogen peroxide in advance to reducing substances (the especially S in carbide slag slurry2-) aoxidized,
Carbide slag slurry after oxidation is added to desulfuration absorbing tower as desulfurizing agent and carries out flue gas desulfurization, carbide slag slurry in sweetening process
It is reacted with sulfur dioxide and generates calcium sulfite, calcium sulfite is reoxidised into calcium sulfate, and then desulfurized gypsum is made, and realizes resource
It recycles.Since reducing substances are removed by hydrogen peroxide oxidation in advance, during calcium sulfite oxidation, oxidation effect
Rate can greatly improve, and not will receive the influence of reducing substances.
In order to guarantee that the dioxygen water energy being added is sufficiently mixed with carbide slag slurry, contacts, to ensure reducing substances by oxygen
That changes is more thorough, can optimize the laying of carbide slag slurries liquid pipeline 10 and dioxygen water lines 13: the calcium carbide as follows
The position that slurry liquid pipeline 10 and dioxygen water lines 13 are connected to the circulation pipe 6 be respectively positioned on the circulating pump 5 feed inlet it
Before, and the outlet ends of the carbide slag slurries liquid pipeline 10 and dioxygen water lines 13 are respectively positioned on the charging of the circulating pump 5
The centerline of pipe 4, in addition, relatively close and dioxygen water lines 13 the outlet of the spacing of the outlet of two pipelines is located at carbide slag slurry
The upstream of the outlet of pipeline 10, as shown in Figure 2.
Hydrogen peroxide and carbide slag slurry are added by the feed pipe 4 of 2 circulating pump 5 of desulfuration absorbing tower, have following two excellent
Gesture: (1) flow of general desulfuration absorbing tower circulating pump is very big, and the additional amount very little of carbide slag slurry, hydrogen peroxide is then smaller, root
According to the example of certain company, the flow of circulating pump is 3600m3/ h, and have 6, and the additional amount of carbide slag slurry only has
20m3The additional amount of/h, hydrogen peroxide are then less, and a small amount of carbide slag slurry and hydrogen peroxide mix more equal with a large amount of loop slurry
Even, the contact surface of hydrogen peroxide and carbide slag slurry is bigger, can ensure that the reducing substances oxidation in carbide slag slurry is more thorough；
(2) hydrogen peroxide and carbide slag slurry, which are blended in loop slurry, enters desulfuration absorbing tower through circulating pump, sprays from slurry nozzle,
With smoke contacts from bottom to top, rich hydrogen peroxide can also further aoxidize the reduction brought into flue gas by coal in slurries
Property substance.
Reducing substances in carbide slag slurry are mainly S2-, also with S in actual production operational process2-Meter, hydrogen peroxide tool
There is extremely strong oxidisability, and water-miscible, can faster, more completely aoxidize reducing substances soluble in water, carbide slag
The redox reaction equation of slurries and hydrogen peroxide are as follows:
S2-+4H2O2=SO42-+4H2O
S2-Molar ratio with hydrogen peroxide is 1:4, considers the decomposition loss for having about 10% during the reaction of hydrogen peroxide, double
The content of oxygen water is 27.5% meter (mass percent of industrial grade hydrogen peroxide is generally 27.5%).
In addition, being provided with carbide slag regulating valve 8 and carbide slag flowmeter 9 on the carbide slag slurries liquid pipeline 10；It is described
Dioxygen water lines 13 on be provided with dioxygen water regulating valve 11 and dioxygen water ga(u)ge 12.In order to ensure hydrogen peroxide and carbide slag slurries
The additional proportion of liquid is constant all the time, the stream for needing that the opening size of dioxygen water regulating valve 11 is enable to acquire with carbide slag flowmeter 9
The variation of magnitude and dynamic adjusts, specifically, can S in analysis detection carbide slag slurry in advance2-Amount, then according to carbide slag slurries
The flow of liquid calculates the flow for the hydrogen peroxide that be added, and later again carries out dioxygen water regulating valve 11 and carbide slag flowmeter 9
Flow information adjust automatically chain, that the aperture of dioxygen water regulating valve 11 is monitored according to carbide slag flowmeter 9, with true
The two ratio is protected to be constant all the time, when carbide slag slurries flow quantity changes, the flow of hydrogen peroxide can also change therewith, into
And guarantee that the additional amount of hydrogen peroxide is suitable for that the reducing substances in carbide slag slurry can be sufficiently oxidized.
Using the utility model system when, first open 5 upstream of circulating pump pump inlet switch valve 3, then start
Circulating pump 5 starts the cycle over the loop slurry in desulfuration absorbing tower 2, and the flue gas that boiler generates enters desulfurization through flue 1 and inhales
Receive tower 2.Carbide slag slurry is added in the feed pipe 4 of circulating pump 5 through carbide slag slurries liquid pipeline 10, and carbide slag regulating valve 8 is opened
Degree need to be adjusted according to the amount of 2 exit sulfur dioxide in flue gas of desulfuration absorbing tower, to ensure that desulfurization is abundant.Hydrogen peroxide is through dioxygen
Water lines 13 are added in the feed pipe 4 of circulating pump 5, and the aperture of dioxygen water regulating valve 11 need to be supervised according to carbide slag flowmeter 9
The flow information of survey automatically adjusts, to ensure that the additional amount of hydrogen peroxide is suitable for, both will not excessively will not be very few, can be by calcium carbide
Reducing substances in dreg slurry are fully oxidized.
The prior art is that the carbide slag slurry for generating polyvinyl chloride acetylene is delivered directly in desulfuration absorbing tower and makees
For desulfurizing agent use, to handle the sulfur dioxide in boiler smoke, such as because of a large amount of reducing substances for containing in carbide slag slurry
Sulfide, phosphide etc. will affect the shapes and sizes of gypsum crystal, they can preferentially be oxidized and then be pressed down in conjunction with oxygen
The oxidation of calcium sulfite processed causes desulfurization slurry oxidation effectiveness low, and the desulfurized gypsum dehydration of generation is difficult, aqueous in gypsum to reach
50%, gypsum can not be sold can only fixed-end forces the most.Compared with the prior art, this system is using in hydrogen peroxide oxidation carbide slag
Reducing substances after, the oxidation efficiency of desulfurization rear slurry can be improved, the oxidation efficiency of calcium sulfite can achieve 85% or more,
The gypsum of production is aqueous to be can be used as product and is sold averagely 15%, on the one hand can bring economic benefit for enterprise, separately
On the one hand it can turn waste into wealth, realize that resource comprehensive recycles, promote industry clean manufacturing, developing crcycle economy.
The above descriptions are merely preferred embodiments of the present invention, is not intended to limit the utility model, for this
For the technical staff in field, various modifications and changes may be made to the present invention.It is all in the spirit and principles of the utility model
Within, any modification, equivalent replacement, improvement and so on should be included within the scope of protection of this utility model.
Claims (4)
1. the system for removing reducing substances in carbide slag slurry in carbide slag sulfur removal technology, the carbide slag sulfur removal technology packet
Include desulfuration absorbing tower (2), circulation pipe (6) and circulating pump (5), entrance and the desulfuration absorbing tower (2) of the circulation pipe (6)
Lower part connection, export and be connected to the slurry nozzle (7) being arranged at the top of desulfuration absorbing tower (2), the circulating pump (5) use
In drive loop slurry from circulation pipe (6) entrance one end to exit end flow, which is characterized in that the system includes calcium carbide
Slurry liquid pipeline (10) and dioxygen water lines (13), carbide slag slurries liquid pipeline (10) and dioxygen water lines (13) are respectively used to institute
It states and carbide slag slurry and hydrogen peroxide is added in circulation pipe (6).
2. the system that reducing substances in carbide slag slurry are removed in carbide slag sulfur removal technology according to claim 1,
It is characterized in that, the position that the carbide slag slurries liquid pipeline (10) and dioxygen water lines (13) are connected to the circulation pipe (6) is equal
Before the feed inlet of the circulating pump (5).
3. the system that reducing substances in carbide slag slurry are removed in carbide slag sulfur removal technology according to claim 2,
It is characterized in that, the outlet ends of the carbide slag slurries liquid pipeline (10) and dioxygen water lines (13) are respectively positioned on the circulating pump
(5) centerline of feed pipe (4).
4. the system that reducing substances in carbide slag slurry are removed in carbide slag sulfur removal technology according to claim 1,
It is characterized in that, is provided with carbide slag regulating valve (8) and carbide slag flowmeter (9) on the carbide slag slurries liquid pipeline (10)；Institute
Dioxygen water regulating valve (11) and dioxygen water ga(u)ge (12) are provided in the dioxygen water lines (13) stated；Wherein, the hydrogen peroxide
The opening size of regulating valve (11) can be with the variation of the flow value of the carbide slag flowmeter (9) acquisition and dynamic adjusts.
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| CN109675424A (en) * | 2018-11-23 | 2019-04-26 | 宜宾海丰和锐有限公司 | The method and system of reducing substances in carbide slag slurry are removed in carbide slag sulfur removal technology |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109675424A (en) * | 2018-11-23 | 2019-04-26 | 宜宾海丰和锐有限公司 | The method and system of reducing substances in carbide slag slurry are removed in carbide slag sulfur removal technology |
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