CN209848643U - Treatment system for removing sulfur dioxide in flue gas - Google Patents
Treatment system for removing sulfur dioxide in flue gas Download PDFInfo
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- CN209848643U CN209848643U CN201822102017.4U CN201822102017U CN209848643U CN 209848643 U CN209848643 U CN 209848643U CN 201822102017 U CN201822102017 U CN 201822102017U CN 209848643 U CN209848643 U CN 209848643U
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Abstract
The utility model discloses a processing system for getting rid of sulfur dioxide in flue gas, absorb the sulfur dioxide who turns into calcium sulfate suspension thick liquid including being arranged in with sulfur dioxide in the flue gas and absorb conversion device, be used for absorbing conversion device to sulfur dioxide and carryThe device for separating the solid and the liquid of the calcium sulfate suspension slurry, the collecting device for collecting the solid separated by the separating device and the circulating pipeline conveying mechanism for circularly conveying the desulfurization liquid separated by the separating device into the sulfur dioxide absorption and conversion device. The treatment system can completely remove sulfur dioxide impurities in the flue gas and avoid CO2The poisoning failure of the adsorbent can ensure CO2And (5) product quality.
Description
Technical Field
The utility model belongs to the technical field of flue gas desulfurization, concretely relates to a processing system for getting rid of sulfur dioxide in flue gas.
Background
The development of human demand for energy has led to CO2The emission of greenhouse gases is increased, the total global carbon emission in 2017 is up to 325 hundred million tons, and CO is generated in the cement industry2The emission amount accounts for about 5% of the total carbon emission amount, and in order to implement new development concepts, a way of energy conservation, emission reduction and environmental protection development is needed.
Flue gas CO in cement kiln2In the capture and purification system, the quality of the carbon dioxide product produced by the project can reach the national industrial standard (GB/T6052-2011) and the national industrial standardAccording to the food additive standard (GB1886.288-2016), sulfur dioxide in the flue gas can cause poisoning failure of an adsorbent for capturing carbon dioxide in a subsequent process, and the sulfur dioxide impurity in the flue gas must be removed before the carbon dioxide is captured from the flue gas of the cement kiln. Meanwhile, in order to meet the requirement of environmental protection and reduce the production cost, the recycling of products needs to be considered in combination with the characteristics of a cement clinker line.
SUMMERY OF THE UTILITY MODEL
The utility model discloses aim at solving the technical problem who exists among the prior art. Therefore, the utility model provides a processing system for getting rid of sulfur dioxide in flue gas, the purpose purifies the flue gas, the cyclic utilization of being convenient for, reduction in production cost.
In order to realize the purpose, the utility model discloses the technical scheme who takes does:
a treatment system for removing sulfur dioxide in flue gas comprises a sulfur dioxide absorption and conversion device for absorbing and converting the sulfur dioxide in the flue gas into calcium sulfate suspension slurry, a separation device for performing solid-liquid separation on the calcium sulfate suspension slurry conveyed by the sulfur dioxide absorption and conversion device, a collection device for collecting solids separated by the separation device, and a circulating pipeline conveying mechanism for circularly conveying desulfurization liquid separated by the separation device into the sulfur dioxide absorption and conversion device.
The sulfur dioxide absorbs the conversion equipment including the sulfur dioxide absorbing device who is used for absorbing the sulfur dioxide in order to form the sulfite solution and being used for turning into the conversion equipment of calcium sulfate suspension with the sulfite solution, sulfur dioxide absorbing device includes desulfurization washing tower, desulfurization washing pump and leads the draught fan of desulfurization washing tower with the flue gas through first connecting line, the desulfurization washing tower passes through the second connecting line and is connected with conversion equipment, the desulfurization washing pump is located on the second connecting line, separator passes through circulation pipeline conveying mechanism and is connected with the desulfurization washing tower.
The conversion device comprises an oxidation tank, a neutralization tank and an air blower used for introducing air into the oxidation tank, the desulfurization water washing tower is connected with the oxidation tank through a second connecting pipeline, the oxidation tank is connected with the neutralization tank through a third connecting pipeline, and the neutralization tank is connected with the separation device through a fourth connecting pipeline.
The conversion apparatus also includes an agitator for agitating the reactants within the neutralization tank.
And a slurry pump is arranged to guide the calcium sulfate suspension slurry in the neutralization tank into the separation device through a fourth connecting pipeline.
The separation device comprises a suspension separator and a filter, the neutralization tank is connected with the suspension separator through a fourth connecting pipe, a suspension separation outlet of the suspension separator is connected with the filter through a fifth connecting pipeline, a clarified liquid outlet of the suspension separator is connected with the circulating pipeline conveying mechanism through a sixth connecting pipeline, a solid outlet of the filter is connected with the collection device through a seventh connecting pipeline, and a clarified liquid outlet of the filter is connected with the circulating pipeline conveying mechanism through an eighth connecting pipeline.
The filter is a vacuum belt filter.
And the circulating pipeline conveying mechanism comprises a ninth connecting pipeline and a clarified liquid pump arranged on the ninth connecting pipeline, and an outlet of the ninth connecting pipeline is connected with the desulfurization water washing tower.
The treatment system also comprises a sulfur dioxide desulfurization solution preparation device and a desulfurization solution conveying mechanism used for conveying the desulfurization solution prepared by the sulfur dioxide preparation device to the sulfur dioxide absorption and conversion device.
The sulfur dioxide desulfurization liquid preparation device comprises a liquid preparation tank, a desulfurization liquid tank, an eleventh connecting pipeline and a liquid preparation pump arranged on the eleventh connecting pipeline, the liquid preparation tank is connected with the desulfurization liquid tank through the eleventh connecting pipeline, the desulfurization liquid conveying mechanism comprises a twelfth connecting pipeline and a desulfurization liquid pump arranged on the twelfth connecting pipeline, and the desulfurization liquid tank is connected with the sulfur dioxide absorption and conversion device through the twelfth connecting pipeline.
The utility model has the advantages that:
(1) the treatment system can completely remove sulfur dioxide impurities in the flue gas and avoid CO2The poisoning failure of the adsorbent can ensure CO2And (5) product quality.
(2) By using the present processing systemAdding SO2The gas is absorbed, oxidized, neutralized, separated and the like to form gypsum waste residue which can be used as one of raw materials for cement production; the separated waste water is a desulfurization solution and can enter the flue gas pretreatment system again for cyclic utilization. The whole treatment process has no pollution to the environment, and because the desulfurization solution can be recycled, the consumption of the desulfurization solution is greatly reduced, and the production cost is reduced.
(3) The processing system can ensure smooth and stable operation.
Drawings
The description includes the following figures, the contents shown are respectively:
FIG. 1 is a schematic diagram of the absorption, conversion and separation structure of sulfur dioxide in the present invention;
FIG. 2 is a schematic view of a configuration of a sulfur dioxide desulfurizing liquid preparing apparatus.
Labeled as:
1. a sulfur dioxide absorption device; 2. a conversion device; 3. a separation and collection device; 4. a desulfurization water washing tower; 5. a first connecting line; 6. a second connecting line; 7. a desulfurization water washing pump; 8. an oxidation tank; 9. a third connecting pipeline; 10. a neutralization tank; 11. a slurry pump; 12. a fourth connecting pipeline; 13. a blower; 14. a tenth connecting line; 15. a suspension separator; 16. a vacuum belt filter; 17. a fifth connecting pipeline; 18. a sixth connecting line; 19. a seventh connecting line; 20. an eighth connecting pipeline; 21. a clarified liquid pump; 22. a ninth connecting line; 23. an induced draft fan; 24. a cement kiln; 25. preparing a liquid tank; 26. a desulfurization liquid tank; 27. liquid dispensing pump; 28. an eleventh connecting line; 29. a desulfurization liquid pump; 30. a twelfth connecting pipeline; 31. a raw material grinding and waste gas treatment system; 32. a kiln tail chimney; 33. a stirrer; 34. a feed inlet; 35. a water pipe; 36. a drug tube; 37. and (4) a collecting device.
Detailed Description
The following detailed description of the embodiments of the present invention will be given with reference to the accompanying drawings, for the purpose of helping those skilled in the art to understand more completely, accurately and deeply the conception and technical solution of the present invention, and to facilitate its implementation.
As shown in fig. 1, a processing system for removing sulfur dioxide in flue gas includes a sulfur dioxide absorption and conversion device for absorbing and converting sulfur dioxide in flue gas into calcium sulfate suspension slurry, a separation device for performing solid-liquid separation on the calcium sulfate suspension slurry conveyed by the sulfur dioxide absorption and conversion device, a collection device for collecting solids separated by the separation device, and a circulation pipeline conveying mechanism for circularly conveying a desulfurization solution separated by the separation device into the sulfur dioxide absorption and conversion device. SO is treated by the treatment system2The gas is absorbed, converted, separated and the like to form gypsum waste residue which can be used as one of raw materials for cement production; the separated waste water is a desulfurization solution and can enter the flue gas pretreatment system again for cyclic utilization.
The sulfur dioxide absorption and conversion device comprises a sulfur dioxide absorption device 1 for absorbing sulfur dioxide to form a sulfite solution and a conversion device 2 for converting the sulfite solution into calcium sulfate suspension, and the separation device and the collection device jointly form a separation and collection device 3. The sulfur dioxide absorbing device comprises a desulfurization water washing tower 4, a desulfurization water washing pump 7 and a draught fan 23 which leads the flue gas to the desulfurization water washing tower 4 through a first connecting pipeline 5, the desulfurization water washing tower 4 is connected with a conversion device 2 through a second connecting pipeline 6, the desulfurization water washing pump 7 is arranged on the second connecting pipeline 6, and a separating device is connected with the desulfurization water washing tower 4 through a circulating pipeline conveying mechanism. Specifically, the outlet of the first connecting pipeline is connected with the bottom air inlet of the desulfurization water washing tower, the desulfurization solution of the desulfurization water washing tower flows in from the top, and the gas is fully contacted with the desulfurization solution for desulfurization in the rising process. The principle of sulfur dioxide absorption and conversion is as follows: flue gas generated by the raw material grinding and waste gas treatment system 31 in the cement kiln 24 is introduced into the desulfurization washing tower through the induced draft fan, and is fully contacted with desulfurization liquid in the desulfurization washing tower, the desulfurization liquid completely absorbs sulfur dioxide in the flue gas to form sulfite, and the sulfite is pumped to the conversion device 2 through the desulfurization washing tower.
The conversion device comprises an oxidation tank 8, a neutralization tank 10 and a blower 13 for introducing air into the oxidation tank 8, the desulfurization water washing tower 4 is connected with the oxidation tank 8 through a second connecting pipeline 6, the oxidation tank 8 is connected with the neutralization tank 10 through a third connecting pipeline 9, and the neutralization tank 10 is connected with the separation device through a fourth connecting pipeline 12. Specifically, the blower 13 is connected to the oxidation tank 8 through a tenth connection line 14, and a feed port 34 is provided in the neutralization tank to feed quicklime. The conversion process of the conversion device is as follows: blowing a proper amount of air by a blower to oxidize sulfite in the oxidation tank into sulfate, introducing the sulfate into the neutralization tank, adding quicklime through a charging hole to convert the sulfate in the solution into calcium sulfate (gypsum) to form a suspension. To facilitate the transfer of the slurry suspension, a slurry pump 11 is provided to introduce the calcium sulphate slurry suspension in the neutralization tank 10 into the separation device via a fourth connecting line 12.
In order to ensure that the reactants in the neutralization tank are fully reacted, the conversion device further comprises a stirrer 33 for stirring the reactants in the neutralization tank 10.
The separating device comprises a suspension separator 15 and a filter, a neutralization tank 10 is connected with the suspension separator 15 through a fourth connecting pipe 12, a suspension separation outlet of the suspension separator 15 is connected with the filter through a fifth connecting pipeline 17, a clarified liquid outlet of the suspension separator 15 is connected with a circulating pipeline conveying mechanism through a sixth connecting pipeline 18, a solid outlet of the filter is connected with a collecting device 37 through a seventh connecting pipeline 19, and a clarified liquid outlet of the filter is connected with the circulating pipeline conveying mechanism through an eighth connecting pipeline 20. The filter is preferably a vacuum belt filter 16. The vacuum belt filter has high automation degree; the filtering speed is high, the filtering, washing, deslagging and filter cloth cleaning are all continuous and automatic, and the production efficiency is improved. The circulating pipeline conveying mechanism comprises a ninth connecting pipeline 22 and a clarified liquid pump 21 arranged on the ninth connecting pipeline 22, and the outlet of the ninth connecting pipeline 22 is connected with the desulfurization water washing tower 4. Specifically, the separation process of the separation device is as follows: the suspension is conveyed into the suspension separation device for pre-separation, the gypsum and the desulfurization liquid are separated preliminarily, the separated desulfurization liquid (clarified liquid) is circularly conveyed into the desulfurization washing tower through a ninth connecting pipeline, the gypsum liquid after preliminary separation enters a vacuum belt filter for further separation, the separated gypsum is collected through a collecting device, and the collected gypsum is used as one of cement raw materials for cement production. And the separated desulfurization solution also enters a ninth connecting pipe, and is conveyed into a desulfurization water washing tower under the action of a clarifying solution pump for recycling.
As shown in fig. 2, the treatment system further includes a sulfur dioxide desulfurization solution preparation device and a desulfurization solution delivery mechanism for delivering the desulfurization solution prepared by the sulfur dioxide preparation device to the desulfurization water washing tower. The sulfur dioxide desulfurization liquid preparation device comprises a liquid preparation tank 25, a desulfurization liquid tank 26, an eleventh connecting pipeline 28 and a liquid preparation pump 27 arranged on the eleventh connecting pipeline 28, wherein the liquid preparation tank 25 is connected with the desulfurization liquid tank 26 through the eleventh connecting pipeline 28, the desulfurization liquid conveying mechanism comprises a twelfth connecting pipeline 30 and a desulfurization liquid pump 29 arranged on the twelfth connecting pipeline 30, and the desulfurization liquid tank 26 is connected with the desulfurization water washing tower 4 through the twelfth connecting pipeline 30. Specifically, a water pipe 35 for adding fresh water, a medicament pipe 36 for adding medicament and a stirrer 33 are arranged on the liquid preparation tank, and after the medicament and the water are added into the liquid preparation tank, the stirrer is started to fully mix the medicament and the water, and the mixture is pumped into the desulfurization liquid tank through the liquid preparation pump after being uniformly mixed; when fresh desulfurization liquid needs to be added into the desulfurization water scrubber, the desulfurization liquid pump 29 is started, and then the desulfurization liquid in the desulfurization liquid tank is pumped into the desulfurization water scrubber through the twelfth connecting pipeline.
The treatment system can be applied to cement kiln flue gas CO2Collecting and purifying flue gas, namely CO in the flue gas of the cement kiln2The system is added in the flue gas pretreatment process of the trapping system, SO that SO in the flue gas can be completely removed2Impurities, the produced gypsum can be used as one of cement raw materials, the desulfurization solution can be recycled, no pollution is caused to the environment, and CO can be effectively reduced2The production cost of (2).
The invention has been described above by way of example with reference to the accompanying drawings. Obviously, the specific implementation of the present invention is not limited by the above-described manner. Various insubstantial improvements are made by adopting the method conception and the technical proposal of the utility model; or without improvement, the above conception and technical solution of the present invention can be directly applied to other occasions, all within the protection scope of the present invention.
Claims (6)
1. A treatment system for removing sulfur dioxide in flue gas is characterized by comprising a sulfur dioxide absorption and conversion device, a separation device, a collection device and a circulating pipeline conveying mechanism, wherein the sulfur dioxide absorption and conversion device is used for absorbing and converting the sulfur dioxide in the flue gas into calcium sulfate suspension, the separation device is used for carrying out solid-liquid separation on the calcium sulfate suspension conveyed by the sulfur dioxide absorption and conversion device, the collection device is used for collecting solids separated by the separation device, the circulating pipeline conveying mechanism is used for circularly conveying desulfurization liquid separated by the separation device into the sulfur dioxide absorption and conversion device, the sulfur dioxide absorption and conversion device comprises a sulfur dioxide absorption device and a conversion device, the sulfur dioxide absorption device comprises a desulfurization water washing tower, a desulfurization water washing pump and a draught fan, the draught fan is used for guiding the flue gas to the desulfurization water washing tower through a first connecting pipeline, the desulfurization water washing tower is connected with the conversion device through a second connecting pipeline, the desulfurization water washing pump is arranged on the second connecting pipeline, the separation device is connected with the desulfurization water washing tower through a circulating pipeline conveying mechanism, the conversion device comprises an oxidation tank, a neutralization tank and an air blower used for leading air into the oxidation tank, the desulfurization water washing tower is connected with the oxidation tank through the second connecting pipeline, the oxidation tank is connected with the neutralization tank through a third connecting pipeline, the neutralization tank is connected with the separation device through a fourth connecting pipeline, the separation device comprises a suspension separator and a filter, the neutralization tank is connected with the suspension separator through a fourth connecting pipeline, a suspension separation outlet of the suspension separator is connected with the filter through a fifth connecting pipeline, a clear liquid outlet of the suspension separator is connected with the circulating pipeline conveying mechanism through a sixth connecting pipeline, and a solid outlet of the filter is connected with the collection device through a seventh connecting pipeline, the clear liquid outlet of the filter is connected with the circulating pipeline conveying mechanism through an eighth connecting pipeline, the circulating pipeline conveying mechanism comprises a ninth connecting pipeline and a clear liquid pump arranged on the ninth connecting pipeline, and the outlet of the ninth connecting pipeline is connected with the desulfurization water washing tower.
2. The treatment system for removing sulfur dioxide from flue gas of claim 1, wherein said reformer further comprises an agitator for agitating the reactants in the neutralization tank.
3. The treatment system for removing sulfur dioxide from flue gas according to claim 1, wherein a slurry pump is provided to introduce the calcium sulfate slurry suspension in the neutralization tank into the separation device through the fourth connecting line.
4. The processing system for removing sulfur dioxide from flue gas as recited in claim 1, wherein said filter is a vacuum belt filter.
5. The system of claim 1, further comprising a sulfur dioxide solution preparing device and a solution conveying mechanism for conveying the solution prepared by the sulfur dioxide preparing device to the sulfur dioxide absorption and conversion device.
6. The processing system for removing sulfur dioxide in flue gas according to claim 5, wherein the sulfur dioxide desulfurizing liquid preparing device comprises a liquid preparing tank, a desulfurizing liquid tank, an eleventh connecting pipeline and a liquid preparing pump arranged on the eleventh connecting pipeline, the liquid preparing tank is connected with the desulfurizing liquid tank through the eleventh connecting pipeline, the desulfurizing liquid conveying mechanism comprises a twelfth connecting pipeline and a desulfurizing liquid pump arranged on the twelfth connecting pipeline, and the desulfurizing liquid tank is connected with the sulfur dioxide absorbing and converting device through the twelfth connecting pipeline.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201822102017.4U CN209848643U (en) | 2018-12-14 | 2018-12-14 | Treatment system for removing sulfur dioxide in flue gas |
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| CN201822102017.4U CN209848643U (en) | 2018-12-14 | 2018-12-14 | Treatment system for removing sulfur dioxide in flue gas |
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