CN204643866U - A kind of system utilizing magnesia FGD liquid and waste slag produced preparation gelling material raw material - Google Patents
A kind of system utilizing magnesia FGD liquid and waste slag produced preparation gelling material raw material Download PDFInfo
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- CN204643866U CN204643866U CN201520324369.8U CN201520324369U CN204643866U CN 204643866 U CN204643866 U CN 204643866U CN 201520324369 U CN201520324369 U CN 201520324369U CN 204643866 U CN204643866 U CN 204643866U
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Abstract
The utility model discloses and relate to a kind of system utilizing magnesia FGD liquid and waste slag produced preparation gelling material raw material, thionizer (1) is comprised successively according to streamline, mixture pond (2), retort (3), oslo cooling crystallizer (4), whizzer (5) and packaging facilities (6), described thionizer (1) is built-in with sweetening agent magnesium hydroxide solution spray device, also comprise the sulfuric acid hold-up vessel (7) adding Waste Sulfuric Acid in mixture pond (2), magnesian MgO storehouse (10) is added in mixture pond (2), the exit of wherein said sulfuric acid hold-up vessel (7) is provided with sulfuric acid volume pump (8).The utility model can sulfur-bearing obnoxious flavour in purification of exhaust gas, lowers magnesium sulfite to the corrosion of equipment, also stabilizes the output of by product, also improve the quality of finished product, saved facility investment, optimized system, reduced cost.
Description
Technical field
The utility model relates to the preparation system of magnesium sulfate, particularly relates to a kind of system utilizing magnesia FGD liquid and waste slag produced preparation gelling material raw material.
Background technology
Flue gas desulfurization technique is one of the Main Means controlling sulphur dioxide emission, and at present, state's inner desulfurization technology is mainly that primary and secondary product is for CaSO with limestone/gypsum
42H
2o (gypsum), most area desulfurated plaster cannot process, and directly abandons formation secondary pollution.Some areas can sell but due to produced gypsum qualitt poor, cheap, cause running cost high.And need waste discharge, the pollutents such as solid waste, there is secondary pollution problem.
China is the deficient country of a solfatara, and a large amount of solfatara resource of annual import, prepares magnesium sulfate and magnesium sulfate product, traditional MgSO
47H
2o preparation technology, uses H
2sO
4react with MgO, produce MgSO
47H
2o.The a large amount of H of this method consumption
2sO
4and MgO, production cost is higher.China's energy structure is based on coal, and coal is again high S coal, and discharge causes environmental pollution, and country is at improvement SO
2discharge drops into huge fund.Employing is that the sulfur method of sweetening agent is called wet magnesium oxide desulphurization technology with MgO, and this technology desulfuration efficiency is high, and by product is MgSO
4.
7H2O.MgSO
47H
2o added value is high, utilization is extensive.But due to problems such as technology, the magnesium sulfate heptahydrate that desulfurization waste liquor extracts is agriculture level, poor quality is difficult to sell.The gelling material mentioned in this patent is magnesium oxysulfide concrete, and the magnesium oxide that is mainly of this cement adds the weighting material such as magnesium sulfate heptahydrate and flyash.Adopt this to invent the desulfurizing byproduct produced and do not worry the problems such as poor quality; Really accomplish serialization stably manufactured.
Domestic in magnesium oxide flue gas desulfurization recovery desulfurization waste liquor technology at present, mainly reclaim magnesium sulfate heptahydrate, employing triple effect evaporation technology extracts the magnesium sulfate in desulfurizing byproduct usually.This technology all exists that investment is large, energy consumption is high, cost recovery is high, poor product quality, underproduce, and reclaim(ed) sulfuric acid magnesium is more, lose larger, causes magnesia FGD enterprise generally to be arranged outside after desulfurization product oxide treatment at present, both abandons method, and caused secondary pollution.
In addition, the sulfuric acid oxidation being representative with Chinese Patent Application No. 200810180890.3 in addition adds soda acid neutralisation reclaim(ed) sulfuric acid magnesium and sulfurous gas.The magnesium sulfite generated after the patent provides a kind of desulfurization, by adding sulfuric acid, prepares liquid SO
2, absorption tower slurries are magnesium sulfite crystal, serious to equipment attrition, affect desulphurization system steady running; Then be transported to neutralization tank, add the neutralizer prepared by magnesium oxide, regulate pH value, then through slagging-off, solid-liquid separation, magnesium sulfate heptahydrate is made in crystallization.This technique achieves desulfurization waste liquor not to be needed evaporation and directly reclaims magnesium sulfate heptahydrate and liquid SO
2this reduces energy consumption relatively, but there is following shortcoming with not enough:
The first, magnesium sulfite crystal is very serious to equipment and pipe wear, affects desulphurization system steady running.LiuHeTianRong company adopts technique in Wei Qiao foundation group plant project, causes desulphurization system serious wear to run.
The second, SO in flue gas
2react with magnesium hydroxide and generate a large amount of magnesium sulfite, magnesium sulfite is by vacuum belt machine filter dehydration, and in dehydration, a small amount of magnesium sulfite is oxidized to magnesium sulfate at vacuum box intercrystalline, blocking vacuum box and vacuum pump, and system cannot be run continuously; A large amount of magnesium sulfite stacks polluted underground water; Magnesium sulfite transport increases cost.
Three, magnesium sulfite and sulfuric acid reaction generate SO
2collection and confinement of gases difficulty.
Four, this technique unresolved sweetening solid waste problem.
Current environment pollutes more serious, and every discharge index requires to accomplish near zero release, and recycling economy becomes a development trend.As can be seen here, adopt magnesia FGD new technology thoroughly to reclaim desulfurization waste liquor, waste residue, really accomplish zero release, and realize low cost, continuous, efficient, Gao Pin, stably manufactured, become the important topic that magnesia FGD technology is current.
Utility model content
The purpose of this utility model is to provide a kind of system utilizing magnesia FGD liquid and waste slag produced preparation gelling material raw material, improves desulfuration efficiency, has saved the energy, reduce the cost recovery of desulfurization waste liquor waste residue, solve sweetener erosion corrosion problem.
For solving the problem, technical solution adopted in the utility model is:
A kind of system utilizing magnesia FGD liquid and waste slag produced preparation gelling material raw material, comprise thionizer, mixture pond, retort, oslo cooling crystallizer, whizzer and packaging facilities successively according to streamline, described thionizer is built-in with sweetening agent magnesium hydroxide solution spray device; Also comprise in mixture pond, add Waste Sulfuric Acid sulfuric acid hold-up vessel, in mixture pond, add magnesian MgO storehouse, the exit of wherein said sulfuric acid hold-up vessel is provided with sulfuric acid volume pump; The pipeline that described oslo cooling crystallizer leads to whizzer is the bottom being arranged on oslo cooling crystallizer, the upper portion side wall of oslo cooling crystallizer is provided with pipeline and connects gas-liquid separator, vacuum pump set and refrigerator successively, be provided with the fluid circulation pump that oslo cooling crystallizer internal liquid is cooled below described oslo cooling crystallizer, between oslo cooling crystallizer and whizzer, be provided with discharging pump.
Further, the top of described thionizer is provided with net air discharge-channel.
Further, described retort is provided with device for detecting density, and has the sample liquids of Density Detection pump abstraction reaction tank to be supplied to device for detecting density detection.
Further, the discharge port in described MgO storehouse is provided with Weighing feeder.
Further, also thickener is provided with between described oslo cooling crystallizer and whizzer.
Further, described oslo cooling crystallizer is provided with device for detecting temperature and negative pressure monitoring device.
Further, described mixture pond is also connected with the oxidation fan providing oxidizing gas in it.
Further, in described thionizer, be also provided with strong oxygen levitation device, for when oxygen level is low in flue gas, strengthen oxygen level.
Further, also drying machine is provided with between described whizzer and packaging facilities.
The beneficial effect adopting technique scheme to produce is: utilize native system utilize magnesia FGD is liquid and waste slag produced and prepares gelling material, can not only sulfur-bearing obnoxious flavour in purification of exhaust gas, lower magnesium sulfite to the corrosion of equipment, also stabilize the output of by product, also improve the quality of finished product, adopt crystallisation by cooling to get final product crystallization, and do not need to adopt common triple effect evaporation system, save facility investment, optimized system, reduce cost.
Accompanying drawing explanation
Fig. 1 is a kind of structural representation utilizing the system of magnesia FGD liquid and waste slag produced preparation gelling material raw material of the utility model.
Embodiment
In order to make the purpose of this utility model, technical scheme and advantage clearly understand, below in conjunction with drawings and Examples, the utility model is further elaborated.Should be appreciated that specific embodiment described herein only in order to explain the utility model, and be not used in restriction the utility model.
As Fig. 1 shows a kind of embodiment utilizing the system of magnesia FGD liquid and waste slag produced preparation gelling material raw material of the utility model: a kind of system utilizing magnesia FGD liquid and waste slag produced preparation gelling material raw material, comprise thionizer 1, mixture pond 2, retort 3, oslo cooling crystallizer 4 crystallizer of Adlerika crystallization (allowed by cooling), whizzer 5 and packaging facilities 6 successively according to streamline, described thionizer 1 is built-in with sweetening agent magnesium hydroxide solution spray device; Also comprise in mixture pond 2, add Waste Sulfuric Acid sulfuric acid hold-up vessel 7, in mixture pond 2, add magnesian MgO storehouse 10, the exit of wherein said sulfuric acid hold-up vessel 7 is provided with sulfuric acid volume pump 8; The pipeline that described oslo cooling crystallizer 4 leads to whizzer 5 is the bottom being arranged on oslo cooling crystallizer 4, the upper portion side wall of oslo cooling crystallizer 4 is provided with pipeline and connects gas-liquid separator 11, vacuum pump set 12 and refrigerator 13 successively, be provided with below described oslo cooling crystallizer 4 oslo cooling crystallizer 4 internal liquid is cooled be provided with discharging pump 15 between fluid circulation pump 14, oslo cooling crystallizer 4 and whizzer 5.
The utility model eliminates the flocculation purification before crystallization and filtration step, by impurity such as the magnesium sulfate in desulfurization waste liquor waste residue and flying dusts in the lump for the production of gelling material, thus realizes zero release.Before centrifugation magnesium sulfate supersaturated solution is carried out stiff at thickener, cushioned when enabling the solution of containing magnesium sulfate crystal enter centrifugal link, enhance centrifugal effect.
According to a kind of preferred embodiment utilizing the system of magnesia FGD liquid and waste slag produced preparation gelling material raw material of the utility model, the top of described thionizer 1 is provided with net air discharge-channel.Sulfur-containing smoke gas enters below thionizer, and after desulfurization, net air is discharged from desulfurization upper top, and flue gas from bottom to top, and spray from the top down by sweetening agent, adds the duration of contact of flue gas and sweetening agent and the surface-area contacted.
According to a kind of preferred embodiment utilizing the system of magnesia FGD liquid and waste slag produced preparation gelling material raw material of the utility model, described retort 3 is provided with device for detecting density 3-1, and have the sample liquids of Density Detection pump 3-2 abstraction reaction tank 3 to be supplied to device for detecting density 3-1 to detect, can realize by checking that density determines whether Adlerika reaches capacity.
According to a kind of preferred embodiment utilizing the system of magnesia FGD liquid and waste slag produced preparation gelling material raw material of the utility model, the discharge port in described MgO storehouse 10 is provided with Weighing feeder 10-1, the magnesium oxide added in mixture pond is weighed, accurate feeding amount.
According to a kind of preferred embodiment utilizing the system of magnesia FGD liquid and waste slag produced preparation gelling material raw material of the utility model, between described oslo cooling crystallizer 4 and whizzer 5, be also provided with thickener.The portion of water in magnesium sulfate crystals solution can be removed, cushioned when enabling magnesium sulfate crystals solution enter centrifugal link, enhance centrifugal effect.
According to a kind of preferred embodiment utilizing the system of magnesia FGD liquid and waste slag produced preparation gelling material raw material of the utility model, described oslo cooling crystallizer 4 is provided with device for detecting temperature 4-1 and negative pressure monitoring device 4-2, for monitor and crystallization control process in pressure, temperature variation.
According to a kind of preferred embodiment utilizing the system of magnesia FGD liquid and waste slag produced preparation gelling material raw material of the utility model, described mixture pond 2 is also connected with the oxidation fan 9 providing oxidizing gas in it, described oxidation fan 9 is mainly used in when mixture pond 2 sulfite Mg content is too high, and during the relatively low situation of magnesium sulfate content, increase oxygen-supplying amount, thus make magnesium sulfite be oxidized to magnesium sulfate.
According to a kind of preferred embodiment utilizing the system of magnesia FGD liquid and waste slag produced preparation gelling material raw material of the utility model, in described thionizer 1, be also provided with strong oxygen levitation device, for when oxygen level is low in flue gas, strengthen oxygen level.
According to a kind of preferred embodiment utilizing the system of magnesia FGD liquid and waste slag produced preparation gelling material raw material of the utility model, also drying machine is provided with, for the magnesium sulfate crystals after centrifugal and other solid waste are carried out drying between described whizzer 5 and packaging facilities 6.
Although be described the utility model with reference to multiple explanatory embodiment of the present utility model here, but, should be appreciated that, those skilled in the art can design a lot of other amendment and embodiment, these amendments and embodiment will drop within spirit disclosed in the present application and spirit.More particularly, in the scope of, accompanying drawing open in the application and claim, multiple modification and improvement can be carried out to the building block of subject combination layout and/or layout.Except the distortion carried out building block and/or layout and improving, to those skilled in the art, other purposes also will be obvious.
Claims (9)
1. one kind utilizes the system of magnesia FGD liquid and waste slag produced preparation gelling material raw material, it is characterized in that: comprise thionizer (1), mixture pond (2), retort (3), oslo cooling crystallizer (4), whizzer (5) and packaging facilities (6) successively according to streamline, described thionizer (1) is built-in with sweetening agent magnesium hydroxide solution spray device;
Also comprise the sulfuric acid hold-up vessel (7) of interpolation Waste Sulfuric Acid in mixture pond (2), in mixture pond (2), add magnesian MgO storehouse (10), the exit of wherein said sulfuric acid hold-up vessel (7) is provided with sulfuric acid volume pump (8);
The pipeline that described oslo cooling crystallizer (4) leads to whizzer (5) is the bottom being arranged on oslo cooling crystallizer (4), the upper portion side wall of oslo cooling crystallizer (4) is provided with pipeline and connects gas-liquid separator (11), vacuum pump set (12) and refrigerator (13) successively, described oslo cooling crystallizer (4) below is provided with the fluid circulation pump (14) that oslo cooling crystallizer (4) internal liquid is cooled, and is provided with discharging pump (15) between oslo cooling crystallizer (4) and whizzer (5).
2. a kind of system utilizing magnesia FGD liquid and waste slag produced preparation gelling material raw material according to claim 1, is characterized in that: the top of described thionizer (1) is provided with net air discharge-channel.
3. a kind of system utilizing magnesia FGD liquid and waste slag produced preparation gelling material raw material according to claim 1, it is characterized in that: described retort (3) is provided with device for detecting density (3-1), and have the sample liquids of Density Detection pump (3-2) abstraction reaction tank (3) to be supplied to device for detecting density (3-1) detection.
4. a kind of system utilizing magnesia FGD liquid and waste slag produced preparation gelling material raw material according to claim 1, is characterized in that: the discharge port of described MgO storehouse (10) is provided with Weighing feeder (10-1).
5. a kind of system utilizing magnesia FGD liquid and waste slag produced preparation gelling material raw material according to claim 1, is characterized in that: be also provided with thickener between described oslo cooling crystallizer (4) and whizzer (5).
6. a kind of system utilizing magnesia FGD liquid and waste slag produced preparation gelling material raw material according to claim 1, is characterized in that: described oslo cooling crystallizer (4) is provided with device for detecting temperature (4-1) and negative pressure monitoring device (4-2).
7. a kind of system utilizing magnesia FGD liquid and waste slag produced preparation gelling material raw material according to claim 1, is characterized in that: described mixture pond (2) is also connected with the oxidation fan (9) providing oxidizing gas in it.
8. a kind of system utilizing magnesia FGD liquid and waste slag produced preparation gelling material raw material according to claim 1, it is characterized in that: in described thionizer (1), be also provided with strong oxygen levitation device, for when oxygen level is low in flue gas, strengthen oxygen level.
9. a kind of system utilizing magnesia FGD liquid and waste slag produced preparation gelling material raw material according to claim 1, is characterized in that: be also provided with drying machine between described whizzer (5) and packaging facilities (6).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520324369.8U CN204643866U (en) | 2015-05-19 | 2015-05-19 | A kind of system utilizing magnesia FGD liquid and waste slag produced preparation gelling material raw material |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520324369.8U CN204643866U (en) | 2015-05-19 | 2015-05-19 | A kind of system utilizing magnesia FGD liquid and waste slag produced preparation gelling material raw material |
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| CN204643866U true CN204643866U (en) | 2015-09-16 |
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| CN201520324369.8U Active CN204643866U (en) | 2015-05-19 | 2015-05-19 | A kind of system utilizing magnesia FGD liquid and waste slag produced preparation gelling material raw material |
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| CN (1) | CN204643866U (en) |
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2015
- 2015-05-19 CN CN201520324369.8U patent/CN204643866U/en active Active
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