CN212581531U - Intermittent dry/semi-dry desulphurization ash stabilization modification system - Google Patents
Intermittent dry/semi-dry desulphurization ash stabilization modification system Download PDFInfo
- Publication number
- CN212581531U CN212581531U CN202020890070.XU CN202020890070U CN212581531U CN 212581531 U CN212581531 U CN 212581531U CN 202020890070 U CN202020890070 U CN 202020890070U CN 212581531 U CN212581531 U CN 212581531U
- Authority
- CN
- China
- Prior art keywords
- dry
- gypsum
- semi
- fly ash
- aeration tower
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Abstract
The utility model relates to an intermittent type formula dry process/semidry process desulfurization ash stabilization modification system mainly solves the unable extensive comprehensive utilization's of present dry process/semidry process desulfurization ash problem, can also realize the resource utilization of waste sulfuric acid simultaneously, reaches the target of treating waste with waste, creates apparent economy and environmental benefit. The system consists of a jet aerator, an aeration tower, a gas discharge pipe and a desulfurized fly ash feederThe system comprises an acid liquid tank, an acid liquid pump, a slurry discharge pump, a gypsum cyclone, a gypsum dehydrator, an overflow tank and a circulating pump; the conventional one-step oxidation process is decomposed into multiple steps, and the solid-liquid ratio and the pH value of the slurry in each step are accurately controlled, so that CaSO is avoided3Decompose to release SO2And ensures enough CaSO3In a liquid phase reaction system, finally overcomes the instability of dry/semi-dry desulfurized fly ash and SO brought by high alkalinity2The secondary pollution and the slow oxidation rate are achieved, and the clean and efficient modification is creatively realized.
Description
Technical Field
The utility model belongs to the technical field of resource and environment, a stabilization modification and resource utilization to dry process/semi-dry process desulfurization ash are related to, specifically speaking relate to an intermittent type formula dry process/semi-dry process desulfurization ash stabilization modification system.
Background
In recent years, due to the high importance of our country on the ecological environment protection, and the high importance of our country on SO2The emission requirements are becoming more and more strict, and the flue gas desulfurization process is widely popularized and applied in the industries of coal-fired power plants, steel sintering, industrial boilers, petrochemical industry and the like, wherein the dry/semi-dry desulfurization process represented by CFB, LIFAC, NID, SDA and CDSI has the advantages of small occupied area, low investment, low operating cost, low energy consumption, no sewage and waste acid emission and the like, and becomes the trend of the future development of the flue gas desulfurization technology.
The dry/semi-dry desulfurizing process features that powdered or granular calcium-base absorbent is used to eliminate SO from fume2The desulfurization product is dry powder and mainly comprises CaSO3·1/2H2O、CaCO3、CaSO4·2H2O and a small amount of unreacted Ca (OH)2And the like. Compared with wet desulphurization process, the desulphurization ash produced by dry/semi-dry desulphurization process has much more complex components, has the characteristics of high sulfur, high calcium and high alkalinity, and is especially suitable for the production of the desulphurization ashIs CaSO3The proportion of (A) is high, and the component with poor chemical stability causes the dry/semi-dry desulfurized fly ash to show unusual physicochemical properties. Because the research on the properties, the reaction characteristics and the action mechanism of the solid wastes is not systematic and deep, people have more attentions on the comprehensive utilization of the solid wastes at present, and an effective utilization way is not formed yet, so that the dry/semi-dry desulfurization ash is accumulated in a large amount or is simply buried, a large amount of valuable land resources are occupied, the enterprise burden is increased, and the further popularization and application of the dry/semi-dry desulfurization process are restricted. Furthermore, since CaSO3Is unstable and is easy to cause SO after long-term stacking2Release of (a) and pose a potential threat to the environment; meanwhile, the dry method/semi-dry method desulfurized ash has small particle size and light weight, and can fly everywhere to pollute air once blown by wind.
For the comprehensive utilization of the dry method/semi-dry method desulfurized fly ash, the related work at home and abroad does not form a complete system at present, the obtained achievements belong to the research property, any technology for large-scale industrial application is not formed, and the following four aspects are mainly considered:
(1) the chemical composition of the desulphurisation ash is quite complex. The phase compositions of the general dry/semi-dry desulfurized fly ash comprise CaSO4、CaSO3、CaCO3、Ca(OH)2、CaO、MgCO3And the components are complex and diversified in chemical property, so that the comprehensive utilization is more limited and more difficult.
(2) The fluctuation of the content of each component of the desulfurized fly ash is large. Due to the differences of the operation, operation and management levels of different enterprises, the differences of different raw material types and proportioning schemes, the differences of desulfurization efficiencies of different desulfurization processes and the differences of components of different batches of coal, the content of each component of desulfurization ash generated by different desulfurization equipment and different periods of time of the same equipment can fluctuate greatly. Such fluctuations bring about frequent changes in the overall chemistry, which makes its comprehensive utilization difficult.
(3) The chemical properties of various components in the desulfurized fly ash are notAnd (4) stabilizing. CaSO in desulfurized fly ash3、Ca(OH)2And CaO is chemically unstable and changes with environmental and time changes. CaSO3Easily decomposed in acid environment or under high temperature condition of neutral or reducing atmosphere to make SO2Is released again to cause secondary pollution of the environment, and simultaneously CaSO3Will be oxidized into CaSO in the air4Resulting in instability of the properties of the desulfurized fly ash material over long periods of use. CaO readily absorbs water to form Ca (OH)2Causing a volume-inhomogeneous expansion, Ca (OH)2Reabsorbing CO from air2To produce CaCO3. These instabilities pose a major obstacle to the comprehensive utilization of the desulfurized fly ash.
(4) CaSO in desulfurized fly ash3Has a high content of and CaSO3The action effect and mechanism of the drug are not clear. CaSO in dry/semi-dry desulfurized fly ash3The content of (A) can be up to more than 50%, and CaSO3The influence on the overall mechanical properties and stability of the material is yet to be further researched and confirmed. For example, when desulfurized fly ash is used as a cement retarder, CaSO3The retarding effect and the influence on the mechanical property of the cement are still greatly controversial.
In conclusion, under the new background that China vigorously advances the construction of 'waste-free cities' and 'waste-free society', the dry-process/semi-dry-process desulfurized fly ash is scientifically treated and finely utilized to realize harmlessness and deep recycling of the desulfurized fly ash, so that the method not only solves the technical problems to be solved urgently in the industries such as coal-fired power plants, steel sintering, industrial boilers, petrifaction and the like in China, but also promotes ecological civilization construction in China, promotes high-quality development, and realizes the inevitable requirements of comprehensive conservation and cyclic utilization of resources.
Based on the basic chemical principles of acid-base neutralization and oxidation-reduction, the dry/semi-dry desulfurization ash is subjected to forced oxidation modification in a sulfuric acid environment, so that the problems in the four aspects of limiting the large-scale comprehensive utilization of the solid waste can be solved at one stroke: CaCO in desulfurized ash under the action of acid-base neutralization reaction3、Ca(OH)2And the basic components such as CaO and the like are all rapidly converted into CaSO4(ii) a And poor stability under the action of oxidation reactionCaSO (C)3Will also be converted into CaSO4. Thus, the original dry/semi-dry desulfurized fly ash with complex and various components and unstable content and chemical properties of various components is converted into stable CaSO4Is a solid waste with chemical properties similar to those of wet-process desulfurization gypsum as a main component. Because the technical problems of each link in the comprehensive utilization of the wet desulphurization gypsum are basically solved, the modified dry/semi-dry desulphurization ash can be comprehensively utilized on a large scale according to various technical routes of the wet desulphurization gypsum, thereby thoroughly solving the increasingly urgent treatment problem of the large solid wastes. Meanwhile, the resource utilization of the waste sulfuric acid is realized.
However, due to SO3 2-Will react with excessive H+Combine to form pollutant SO2Therefore, the pH of the reaction solution cannot be too low; meanwhile, the pH value of the solution is rapidly increased in the dissolving process due to strong alkalinity of the desulfurized fly ash, and CaSO3The solubility of (a) is very low and further decreases with the increase of the pH value, so that the oxidation rate is greatly reduced, and therefore, the solid-to-liquid ratio in the dissolving process, namely the pH value of the solution, cannot be too high. In conclusion, the high-efficiency oxidation of the dry/semi-dry desulfurized ash is realized in a one-step method and a conventional slurry manner, and the SO-free desulfurization is realized2Release is very difficult and innovative stabilization modification methods to tailor the characteristics of the desulfurized fly ash need to be developed.
Disclosure of Invention
In order to solve the technical problem provided in the background art, the utility model provides an intermittent dry method/semidry method desulfurization ash stabilization and modification system which has the advantages of low cost, stable operation, convenient construction and flexible operation.
The utility model adopts the technical proposal that: the utility model provides a modification system is stabilized to intermittent type formula dry process/semidry process desulfurization ash, its technical essential is: the whole system consists of a jet aerator, an aeration tower, a gas discharge pipe, a desulfurized fly ash feeder, an acid liquid tank, an acid liquid pump, a slurry discharge pump, a gypsum cyclone, a gypsum dehydrator, an overflow tank and a circulating pump.
Jet aerator set up in the bottom of aeration tower, gas discharge pipe sets up in the top of aeration tower, aeration tower bottom still is equipped with the sulphuric acid feed inlet simultaneously, arrange thick liquid mouth and overflow circulation mouth, aeration tower top still is equipped with the desulfurization ash feed inlet, the discharge gate of desulfurization ash batcher is connected with the desulfurization ash feed inlet of aeration tower, the export and the access connection of acidizing fluid pump of acidizing fluid jar, the export of acidizing fluid pump is connected with the sulphuric acid feed inlet of aeration tower, the row's thick liquid mouth and the access connection of arranging the thick liquid pump of aeration tower, the export of arranging the thick liquid pump and the access connection of gypsum swirler, the underflow and the overflow export of gypsum swirler respectively with the access connection of gypsum hydroextractor and overflow jar, the export and the access connection of circulating pump of overflow jar, the export of circulating pump and the.
The jet aerator has the functions of stirring and mixing.
The aeration tower is in a vertical cylindrical shape, the height-diameter ratio is 1-15, and an online temperature, liquid level and pH monitoring device is arranged.
The gas discharge pipe is provided with SO2Provided is an online monitoring device.
The desulfurization ash feeder is a metering screw feeder.
The acid liquid pump, the slurry discharging pump and the circulating pump all have metering functions.
The gypsum cyclone is provided with one or more underflow outlets, and when a plurality of underflow outlets are arranged, the underflow outlets are arranged at different heights along the axial direction of the gypsum cyclone and are respectively connected with inlets of different gypsum dewaterers.
The gypsum dehydrator is a vacuum belt dehydrator or a belt filter press.
Compared with the prior art, the utility model discloses following beneficial effect has:
(1) the pH value of the acidified slurry in the whole stabilizing and modifying process is controlled to be between 2.0 and 6.0 all the time according to the optimal solid-liquid ratio, so that CaSO in the desulfurized fly ash can be avoided3Decompose to release SO2And can ensure enough CaSO3Is in a liquid phase reaction system, thereby obviously improving the reaction rate of the whole modification process.
(2) The conventional one-step oxidation process is decomposed into multiple steps, and the problem of slow oxidation rate caused by high alkalinity of the desulfurization ash by the dry method/semi-dry method is solved by accurately controlling the solid-liquid ratio and the pH value of the slurry in each step of oxidation process, so that the high-efficiency oxidation of the high-alkalinity desulfurization ash is creatively realized.
(3) CaSO in desulfurized fly ash by using novel jet aeration technology3The forced oxidation has strong mixing and stirring effects of the jet aerator, has higher oxygenation capacity, oxygen utilization rate and oxygen power transfer efficiency, has the advantages of simple structure, no moving parts, reliable work, flexible operation, convenient adjustment, difficult blockage, easy maintenance and management, low operating cost and the like, and can obviously improve the reaction rate in the forced oxidation process.
(4) The method can simultaneously realize the resource utilization of the dry method/semi-dry method desulfurized fly ash and the waste sulfuric acid, thereby achieving the purposes of treating waste by waste and realizing synergistic circulation and obtaining better economic and environmental benefits.
(5) The high-value utilization of the Mg element in the dry/semi-dry desulfurized fly ash can be realized, and the economic and environmental benefits are further improved.
Drawings
FIG. 1 is the overall process flow diagram of the present invention;
FIG. 2 shows the desulfurized ash and 80% concentrated H from a semi-dry process in a steel plant2SO4Reagent is raw materials, according to the step method of the utility model, pH regulation acidification and forced oxidation laboratory test are carried out, and when the solid content of the final slurry reaches 10 percent, the final slurry comes from CaSO3Schematic diagram of S-balance.
The reference numerals in fig. 1 are as follows: the system comprises a jet aerator, a 2-aeration tower, a 3-gas discharge pipe, a 4-desulfurized fly ash feeder, a 5-acid liquor tank, a 6-acid liquor pump, a 7-slurry discharge pump, a 8-gypsum cyclone, a 9-gypsum dehydrator, a 10-overflow tank and a 11-circulating pump.
Detailed Description
The invention will be further explained with reference to the drawings and the specific embodiments.
As shown in fig. 1-2, the utility model relates to a modified system of intermittent dry process/semidry process desulfurization ash stabilization comprises jet aerator 1, aeration tower 2, gas discharge pipe 3, desulfurization ash batcher 4, acidizing fluid tank 5, acidizing fluid pump 6, slurry pump 7, gypsum swirler 8, gypsum hydroextractor 9, overflow tank 10, circulating pump 11.
The jet aerator 1 has the function of stirring and mixing. The aeration tower 2 is in a vertical cylindrical shape, the height-diameter ratio is 1-15, and an online temperature, liquid level and pH monitoring device is arranged. The gas discharge pipe 3 is provided with SO2Provided is an online monitoring device. The desulfurized fly ash feeder 4 is a metering screw feeder. The acid liquid pump 6, the slurry discharge pump 7 and the circulating pump 11 all have a metering function. The gypsum cyclone 8 is provided with one or more underflow outlets, which, when provided, are arranged at different heights along the axial direction of the gypsum cyclone and are connected to the inlets of different gypsum dewaterers, respectively. The gypsum dewatering machine 9 is a vacuum belt type dewatering machine or a belt type filter press.
The specific implementation process of carrying out the stabilization modification of the desulfurized fly ash by the dry method/semi-dry method by using the system comprises the following ten steps:
the method comprises the following steps: and (4) analyzing and testing raw materials. Analyzing and testing the components of the dry/semi-dry desulfurized fly ash to determine CaSO in the desulfurized fly ash3And the contents of various strong basic compounds, and placing them in the hopper of the desulfurized fly ash feeder 4.
Step two: and (4) preparing acid liquor. Heavy metal and organic pollutantsWaste sulfuric acid and industrial water with low content and mass fraction of 2-98% are respectively placed in an acid liquor tank 5 and an overflow tank 10, and are respectively conveyed into an aeration tower 2 through an acid liquor pump 6 and a circulating pump 11 to prepare H with a certain volume and a pH value of 2.0-4.52SO4After the solution, the addition of acid and water was stopped.
Step three: and (4) acidifying the raw material. Gradually feeding the desulfurized fly ash to the second step H through a desulfurized fly ash feeding machine 42SO4Adding the desulfurization ash obtained in the first step into the solution by the dry method/semi-dry method, simultaneously starting the jet aerator 1 to accelerate the dissolution and reaction processes, monitoring the change of the pH value of the solution in real time, and stopping feeding the desulfurization ash when the pH value rises to 3.0-6.0 and is stable.
Step four: and (4) forced oxidation. Aerating the solution of the third step by a jet aerator 1, wherein HSO in the solution is3 -To be protected by O2Oxidation to SO4 2-To release H+Thereby lowering the pH of the solution.
Step five: the pH is regulated. And when the pH value of the solution obtained in the fourth step is stable, gradually adding the waste sulfuric acid obtained in the second step into the solution through an acid liquid pump 6, and reducing the pH value of the solution to 2.0-4.5 again.
Step six: and (4) carrying out multi-step circulation. Continuously repeating the third step to the fifth step to ensure that solid CaSO gradually exists in the solution in the fifth step4And precipitating to finally form slurry with the solid content of 4-27%.
Step seven: and (5) partially discharging the slurry. And when the volume or solid content of the slurry in the sixth step reaches a certain numerical value, discharging a part of the slurry through a slurry discharge pump 7, and sending the part of the slurry into a gypsum cyclone 8 for solid-liquid separation.
Step eight: and (5) dehydrating the product. And the underflow of the gypsum cyclone 8 in the step seven enters a gypsum dehydrator 9 for dehydration treatment, and finally, a stabilized and modified gypsum product is obtained. When the gypsum cyclone 8 is provided with a plurality of underflow outlets, gypsum with different particle sizes and qualities can be separated and respectively enter different gypsum dewaterers 9.
Step nine: and recycling waste liquid and recovering Mg. Overflow of the gypsum cyclone 8 of said step seven and said stepFiltrate of the gypsum dehydrator 9 enters an overflow tank 10, and the filtrate can be returned to the aeration tower 2 of the second step for recycling through a circulating pump 11, and Ca (OH) can also be added2Preparation of Mg (OH)2And (3) producing a product, so as to recycle Mg element in the dry/semi-dry desulfurized fly ash obtained in the first step.
Step ten: and finishing the modification. And continuously repeating the third to the ninth steps to finally finish the multi-step stabilization modification of the whole dry/semi-dry desulfurization ash.
The original components of the semidry desulfurized fly ash of a certain steel plant are shown in Table 1. According to the step method of the utility model, pH regulation acidification and forced oxidation laboratory tests are carried out, and finally when the solid content of the slurry reaches 10%, the slurry comes from CaSO3S-balance of (a) is shown in fig. 2. Table 2 shows the ingredients of the resulting modified product. As can be seen, CaSO is the most main component in the original semi-dry desulfurized fly ash3And CaCO339.65% and 32.77%, respectively, and a certain amount of MgCO3And Ca (OH)2Equal high alkalinity component, CaSO4The content of (A) is very low. Through the steps and methods of the utility model, almost all CaSO in the original semi-dry desulfurization ash3、CaCO3And Ca (OH)2Are all converted into dihydrate CaSO4At the same time SO2Has little escape, and dihydrate CaSO in the modified product4The content of the modified starch reaches 93.97 percent, and a good modification effect is obtained.
TABLE 1 original composition of semidry desulfurized fly ash (dry basis)
| Cl- | SO3 | CaCO3 | Dihydrate CaSO4 | CaSO4 | MgCO3 | CaSO3 | Ca(OH)2 | Other impurities |
| 1.02% | 1.57% | 32.77% | 0.36% | 3.32% | 8.86% | 39.65% | 6.60% | 5.85% |
TABLE 2 ingredients of modified products (dry basis)
| Cl- | SO3 | CaCO3 | Dihydrate CaSO4 | CaSO4 | MgCO3 | CaSO3 | Ca(OH)2 | Other impurities |
| 0.09% | 0.08% | 0.00% | 93.97% | 0.39% | 0.00% | 0.21% | 0.00% | 5.26% |
The foregoing description of the embodiments is provided to enable any person skilled in the art to make or use the invention sufficiently and effectively. It will be readily apparent to those skilled in the art that various modifications to these embodiments may be made, and the generic principles described herein may be applied to other embodiments without the use of the inventive faculty. Therefore, the present invention is not limited to the above embodiments, and modifications made by those skilled in the art according to the teaching of the present invention should be within the scope of the present invention.
Claims (6)
1. The utility model provides a modified system of intermittent type formula dry process/semidry process desulfurization ash stabilization which characterized in that: the whole system consists of a jet aerator, an aeration tower, a gas discharge pipe, a desulfurized fly ash feeder, an acid liquid tank, an acid liquid pump, a slurry discharge pump, a gypsum cyclone, a gypsum dehydrator, an overflow tank and a circulating pump; jet aerator set up in the bottom of aeration tower, gas discharge pipe sets up in the top of aeration tower, aeration tower bottom still is equipped with the sulphuric acid feed inlet simultaneously, arrange thick liquid mouth and overflow circulation mouth, aeration tower top still is equipped with the desulfurization ash feed inlet, the discharge gate of desulfurization ash batcher is connected with the desulfurization ash feed inlet of aeration tower, the export and the access connection of acidizing fluid pump of acidizing fluid jar, the export of acidizing fluid pump is connected with the sulphuric acid feed inlet of aeration tower, the row's thick liquid mouth and the access connection of arranging the thick liquid pump of aeration tower, the export of arranging the thick liquid pump and the access connection of gypsum swirler, the underflow and the overflow export of gypsum swirler respectively with the access connection of gypsum hydroextractor and overflow jar, the export and the access connection of circulating pump of overflow jar, the export of circulating pump and the.
2. The batch dry/semi-dry desulfurized fly ash stabilization and modification system according to claim 1, characterized in that: the aeration tower is in a vertical cylindrical shape, the height-diameter ratio is 1-15, and an online temperature, liquid level and pH monitoring device is arranged.
3. The batch dry/semi-dry desulfurized fly ash stabilization and modification system according to claim 1, characterized in that: the gas discharge pipe is provided with SO2Provided is an online monitoring device.
4. The batch dry/semi-dry desulfurized fly ash stabilization and modification system according to claim 1, characterized in that: the desulfurization ash feeder is a metering screw feeder.
5. The batch dry/semi-dry desulfurized fly ash stabilization and modification system according to claim 1, characterized in that: the gypsum cyclone is provided with one or more underflow outlets, and when a plurality of underflow outlets are arranged, the underflow outlets are arranged at different heights along the axial direction of the gypsum cyclone and are respectively connected with inlets of different gypsum dewaterers.
6. The batch dry/semi-dry desulfurized fly ash stabilization and modification system according to claim 1, characterized in that: the gypsum dehydrator is a vacuum belt dehydrator or a belt filter press.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020890070.XU CN212581531U (en) | 2020-05-25 | 2020-05-25 | Intermittent dry/semi-dry desulphurization ash stabilization modification system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020890070.XU CN212581531U (en) | 2020-05-25 | 2020-05-25 | Intermittent dry/semi-dry desulphurization ash stabilization modification system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212581531U true CN212581531U (en) | 2021-02-23 |
Family
ID=74640690
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020890070.XU Active CN212581531U (en) | 2020-05-25 | 2020-05-25 | Intermittent dry/semi-dry desulphurization ash stabilization modification system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212581531U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111661866A (en) * | 2020-05-25 | 2020-09-15 | 沈阳环境科学研究院 | Intermittent dry/semi-dry desulphurization ash stabilization modification system and operation method thereof |
| CN115259445A (en) * | 2022-07-12 | 2022-11-01 | 龙佰集团股份有限公司 | Treatment method of wet desulphurization spray liquid for inhibiting generation of sulfur dioxide |
-
2020
- 2020-05-25 CN CN202020890070.XU patent/CN212581531U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111661866A (en) * | 2020-05-25 | 2020-09-15 | 沈阳环境科学研究院 | Intermittent dry/semi-dry desulphurization ash stabilization modification system and operation method thereof |
| CN115259445A (en) * | 2022-07-12 | 2022-11-01 | 龙佰集团股份有限公司 | Treatment method of wet desulphurization spray liquid for inhibiting generation of sulfur dioxide |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN212581531U (en) | Intermittent dry/semi-dry desulphurization ash stabilization modification system | |
| CN105498514A (en) | Cement kiln flue gas desulfurization system and method | |
| CN110817925A (en) | Method for resource utilization of desulfurized fly ash | |
| CN101543729B (en) | Method suitable for utilization of resource of sintering flue gas desulphurization waste solution | |
| CN103028324B (en) | Method for desulfurization of flue gas in boiler by using red mud | |
| CN111747438B (en) | pH regulation and control multistep stabilization modification method for dry/semi-dry desulfurized fly ash | |
| CN212581532U (en) | Continuous dry method/semi-dry method desulfurization ash stabilization treatment system | |
| CN103480265B (en) | One utilizes magnesia to administer SO 2waste gas reclaims the method for byproduct simultaneously | |
| CN101816889A (en) | Desulphurization process by combining printing and dyeing wastewater | |
| CN101549254A (en) | Jacking flue gas processing device and method | |
| CN111661866A (en) | Intermittent dry/semi-dry desulphurization ash stabilization modification system and operation method thereof | |
| CN103301735A (en) | Flue gas desulphurization and dust removal agent for small and medium sized boilers | |
| CN202751947U (en) | Flue gas desulfurization (FGD) device using carbide slag-gypsum method | |
| CN205517225U (en) | Cement kiln flue gas desulfurization system | |
| CN111661865A (en) | Continuous dry method/semi-dry method desulfurization ash stabilization treatment system and method | |
| CN216457976U (en) | Dry and semi-dry desulfurized ash multiphase jet oxidation tower | |
| CN114105343A (en) | Method for cooperatively treating desulfurization ash by desulfurization wastewater treatment system and application | |
| CN216457975U (en) | Dry and semi-dry desulfurized fly ash centrosymmetric jet oxidation tower | |
| CN216440316U (en) | Double-tower type dry and semi-dry desulfurized fly ash aeration oxidation device | |
| CN203048650U (en) | Purification device for expansible graphite washing sewage | |
| CN203777926U (en) | Ammonia absorption tail gas treatment device of sulfur recovery device | |
| CN216457974U (en) | Dry and semi-dry desulfurization ash double-tank body aeration oxidation tower | |
| CN102976285B (en) | Method for preparing sulfuric acid from desulfurized gypsum in secondary lead smelting process as raw material | |
| CN106215673B (en) | It is a kind of using marble waste pulp as the wet fuel gas desulfurizing technology of absorbent | |
| CN105984892A (en) | Calcium sulfate biological treatment regeneration method based on biological desulphurization |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |