CN211358297U - Sintering flue gas desulfurization system - Google Patents
Sintering flue gas desulfurization system Download PDFInfo
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- CN211358297U CN211358297U CN201921914997.6U CN201921914997U CN211358297U CN 211358297 U CN211358297 U CN 211358297U CN 201921914997 U CN201921914997 U CN 201921914997U CN 211358297 U CN211358297 U CN 211358297U
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Abstract
The utility model provides a sintering flue gas desulfurization system, which comprises a slaked lime slurry supply device, an air supply device, a water storage tank, a three-fluid spray gun, a desulfurization tower, a dust removal device and a flue gas inlet pipeline; the slaked lime slurry supply device is communicated with the three-fluid spray gun, the air supply device is communicated with the three-fluid spray gun, and the water storage tank is communicated with the three-fluid spray gun through the infusion pump; the desulfurizing tower bottom is provided with the flue gas inlet and is provided with the exhanst gas outlet, and the below intercommunication of the flue gas inlet of desulfurizing tower has venturi, venturi and advance tobacco pipe intercommunication, and the nozzle of three-fluid spray gun sets up on the tobacco pipe that advances of venturi below. The utility model discloses a sintering flue gas desulfurization system has combined wet flue gas desulfurization and semi-dry desulfurization's method advantage, and the operation is nimble reliable, and flue gas load application scope is wide, and no corruption, no white smoke produce, and desulfurization efficiency can reach 95 ~ 99%.
Description
Technical Field
The utility model belongs to flue gas treatment facility field, concretely relates to sintering flue gas desulfurization system.
Background
The sintering flue gas desulfurization technology is mainly applied to a limestone (lime) -gypsum method and wet desulfurization, the wet desulfurization efficiency is high and can reach 99%, but the problems of wastewater discharge, high operation energy consumption and white smoke emission at a chimney outlet exist. And the sintering flue gas volume is large, and sulfur content is low, and the moisture content is big, and chloride ion is high, causes wet flue gas desulfurization system equipment corrosion problem very serious, seriously threatens the steady operation of whole desulfurization system.
SUMMERY OF THE UTILITY MODEL
The utility model aims to overcome the shortcomings of the prior art and provide a sintering flue gas desulfurization system.
In order to achieve the above purpose, the utility model adopts the following technical scheme: a sintering flue gas desulfurization system comprises a slaked lime slurry supply device, an air supply device, a water storage tank, a three-fluid spray gun, a desulfurization tower, a dust removal device and a flue gas inlet pipeline;
the slaked lime slurry supply device is communicated with the three-fluid spray gun through a fluid pump, the air supply device is communicated with the three-fluid spray gun through a pipeline, and the water storage tank is communicated with the three-fluid spray gun through an infusion pump;
the desulfurizing tower bottom is provided with the flue gas import, the desulfurizing tower is provided with the exhanst gas outlet, the below intercommunication of the exhanst gas inlet of desulfurizing tower has venturi, venturi with advance tobacco pipe way intercommunication, the nozzle of three-fluid spray gun set up in advance on the tobacco pipe way of venturi below, the exhanst gas outlet of desulfurizing tower with dust collector's entry pipeline intercommunication, dust collector's gas outlet has the exhaust pipe through the draught fan intercommunication, the export of draught fan with it has the gas reflux pipe to advance the intercommunication between the tobacco pipe way.
The sintering flue gas desulfurization system combines the advantages of wet desulfurization and semi-dry desulfurization methods, is flexible and reliable to operate, has wide flue gas load application range, is 40-110% of the design load of the system, and does not generate corrosion and white smoke; according to the sintering flue gas desulfurization system, the outlet of the nozzle of the three-fluid spray gun is arranged on the flue gas inlet pipeline below the Venturi tube, slurry sprayed by the nozzle of the three-fluid spray gun can be more fully mixed with flue gas after passing through the Venturi tube, so that the flue gas can better react with slaked lime slurry sprayed by the nozzle of the three-fluid spray gun and compressed air, the desulfurization efficiency is improved, and the desulfurization efficiency can reach 95-99%; the sintering flue gas desulfurization system can introduce part of purified flue gas into the original flue gas through the gas return pipe, can automatically adjust the proportion of the purified flue gas to the circularly introduced original flue gas, and prevents the risk of bed collapse caused by large flue gas load fluctuation.
Preferably, the dust removing device comprises a bag-type dust remover and an ash bin, the bag-type dust remover is provided with a dust collecting hopper, a discharge port of the dust collecting hopper is communicated with the ash bin through a pipeline, a discharge port of the dust collecting hopper is communicated with the smoke inlet pipeline through a dust conveying pipeline, and an outlet of the dust conveying pipeline is positioned on the side wall of the smoke inlet pipeline.
The bag-type dust collector arranged in the sintering flue gas desulfurization system is provided with the dust collecting hopper, the discharge port of the dust collecting hopper is communicated with the smoke inlet pipeline through the dust conveying pipeline, so that the desulfurization dust collected by the bag-type dust collector enters the smoke inlet pipeline to realize the recycling of the desulfurizer, the raw materials are saved, and the cost is reduced.
Preferably, slaked lime thick liquid feeding mechanism includes quick lime storehouse, quick lime slaker, degritting machine and thick liquid jar, the discharge gate in quick lime storehouse with the feed inlet intercommunication of quick lime slaker, the discharge gate of quick lime slaker with the feed inlet intercommunication of degritting machine, the discharge gate of degritting machine with the feed inlet intercommunication of thick liquid jar, the thick liquid jar is provided with the technology water inlet, the discharge gate of thick liquid jar passes through fluid pump and three-fluid spray gun intercommunication.
The sintering flue gas desulfurization system can improve the quality of calcium hydroxide slurry, effectively improve the desulfurization efficiency and reduce the abrasion of system equipment.
Preferably, the exhaust pipeline is communicated with a chimney.
Preferably, the air supply device is an air compression pump.
Preferably, the flue gas outlet of the desulfurization tower is positioned at the top of the desulfurization tower.
Preferably, the diameter of the outlet of the venturi tube is equal to the diameter of the flue gas inlet of the desulfurization tower.
The diameter of venturi outlet with the flue gas inlet diameter of desulfurizing tower is equal, can realize the better mixture of thick liquid and flue gas in the desulfurizing tower, improves desulfurization efficiency.
The beneficial effects of the utility model reside in that: the utility model provides a sintering flue gas desulfurization system, the utility model discloses a sintering flue gas desulfurization system has following advantage: the utility model discloses a sintering flue gas desulfurization system has three-fluid spray gun, and the three-fluid spray gun sprays thick liquid, air, water through the spray gun after, obtains the moderate atomizing thick liquid of particle size and atomizing water droplet, and the desulfurization thick liquid after the high-efficient atomizing is higher than graininess desulfurizer reaction efficiency, can effectively reduce calcium-sulfur ratio, reduce system investment running cost, improves system desulfurization efficiency; the atomized water drops can be quickly evaporated, the temperature of the flue gas is reduced, and the desulfurization reaction efficiency is improved; the fluidization effect is enhanced by compressing air, and the desulfurization reaction efficiency is improved; the three-fluid spray gun is positioned on the smoke inlet pipeline below the Venturi tube, and the slurry sprayed by the nozzle of the three-fluid spray gun can be more fully mixed with the smoke after passing through the Venturi tube, so that the smoke can better react with the slaked lime slurry sprayed by the nozzle of the three-fluid spray gun and the compressed air, and the desulfurization efficiency is improved; the sintering flue gas desulfurization system can introduce part of purified flue gas into the original flue gas, can automatically adjust the proportion of the purified flue gas discharged and the original flue gas circularly introduced, and prevents bed collapse danger caused by large flue gas load fluctuation; the sintering flue gas desulfurization system can improve the quality of calcium hydroxide slurry, effectively improve the desulfurization efficiency and reduce the abrasion of system equipment; the sintering flue gas desulfurization system can prevent throttling effect, prevent the moisture condensation of the cloth bag dust remover and prolong the service life of the cloth bag; the utility model discloses a sintering flue gas desulfurization system adopts air-out on the desulfurizing tower, the last air inlet of dust remover, utilizes gravity to improve dust collection efficiency, effectively reduces system's export dust concentration.
Drawings
Fig. 1 is a schematic structural diagram of a sintering flue gas desulfurization system according to an embodiment of the present invention.
The system comprises a desulfurizing tower 1, a desulfurizing tower 2, a smoke inlet pipeline 3, a Venturi tube 4, a smoke inlet 5, a three-fluid spray gun 6, a slaked lime slurry supply device 7, a quicklime bin 8, a quicklime slaker 9, a sand removing machine 10, a slurry tank 11, a bag-type dust remover 12, an ash bin 13, an induced draft fan 14, a gas return pipe 15, a chimney 16, an air compression pump 17, a water storage tank 18, a process water inlet 19 and a dust conveying pipeline.
Detailed Description
For better illustrating the objects, technical solutions and advantages of the present invention, the present invention will be further described with reference to the following embodiments.
Example 1
As an embodiment of the present invention, a sintering flue gas desulfurization system, as shown in fig. 1, includes a slaked lime slurry supply device 6, an air compression pump 16, a water storage tank 17, a three-fluid spray gun 5, a desulfurization tower 1, a dust removal device, and a chimney 15;
the slaked lime slurry supply device 6 comprises a quicklime bin 7, a quicklime slaker 8, a desander 9 and a slurry tank 10, wherein a discharge port of the quicklime bin 7 is communicated with a feed port of the quicklime slaker 8, a discharge port of the quicklime slaker 8 is communicated with a feed port of the desander 9, a discharge port of the desander 9 is communicated with a feed port of the slurry tank 10, the slurry tank 10 is provided with a process water inlet 18, a discharge port of the slurry tank 10 is communicated with a three-fluid spray gun 5 through a fluid pump, an air compression pump 16 is communicated with the three-fluid spray gun 5 through a pipeline, and a water storage tank 17 is communicated with the;
the dust removing device comprises a bag-type dust remover 11 and an ash bin 12, wherein the bag-type dust remover 11 is provided with an ash collecting hopper;
the bottom of the desulfurizing tower 1 is provided with a flue gas inlet 4, the top of the desulfurizing tower 1 is provided with a flue gas outlet, the lower part of the flue gas inlet 4 of the desulfurizing tower 1 is communicated with a Venturi tube 3, the outlet of the Venturi tube 3 has the same diameter with the flue gas inlet 4 of the desulfurizing tower 1, the Venturi tube 3 is communicated with a flue gas inlet pipe 2, a nozzle of a three-fluid spray gun 5 is arranged on the side wall of the flue gas inlet pipe 2 below the Venturi tube 3, the flue gas outlet of the desulfurizing tower 1 is communicated with an inlet pipe of a bag-type, the gas outlet of the bag-type dust collector 11 is communicated with a chimney 15 through a draught fan 13, a gas return pipe 14 is communicated between the outlet of the draught fan 13 and the smoke inlet pipeline 2, a discharge hole of a collecting ash bucket of the bag-type dust collector 11 is communicated with an ash bin 12 through a pipeline, a discharge hole of the collecting ash bucket of the bag-type dust collector 11 is communicated with the smoke inlet pipeline 2 through a dust conveying pipeline 19, and the outlet of the dust conveying pipeline 19 is positioned on the side wall of the smoke inlet pipeline 2.
The application method of the sintering flue gas desulfurization system comprises the following steps:
(1) feeding quicklime into a quicklime slaker through a quicklime bin to generate slaked lime;
(2) filtering and desanding the hydrated lime by a desander, feeding the filtered and desanded hydrated lime into a slurry tank, and adding process water and the hydrated lime into a process water inlet of the slurry tank to form a hydrated lime slurry;
(3) the flue gas to be treated enters the desulfurizing tower from the flue gas inlet pipeline through the gas inlet pipe on the flue gas inlet;
(4) the slaked lime slurry, the process water and the compressed air are sprayed into the smoke inlet pipeline through the three-fluid spray gun and enter the desulfurization tower along with the smoke through the Venturi tube to carry out desulfurization reaction;
(5) part of the flue gas after the desulfurization reaction enters a dust removal device through a flue gas outlet of a desulfurization tower for dust removal and then enters a chimney through a draught fan to be discharged into the atmosphere, the other part of the flue gas enters the dust removal device through the flue gas outlet of the desulfurization tower for dust removal and then enters a flue gas inlet pipeline through a gas return pipe, one part of the desulfurization ash obtained after dust removal by a cloth bag dust remover is input into a quicklime bin, and the other part of the desulfurization ash enters the flue gas inlet pipeline through a dust conveying pipeline; .
The sintering flue gas desulfurization system has the advantages that the flue gas load application range is wide, the desulfurization efficiency reaches 95-99%, the temperature of a flue gas outlet is more than or equal to 75 ℃, and outlet clean flue gas is unsaturated dry flue gas and does not corrode the system or generate white smoke.
Finally, it should be noted that the above embodiments are only used for illustrating the technical solutions of the present invention and not for limiting the protection scope of the present invention, and although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that the technical solutions of the present invention can be modified or replaced with equivalents without departing from the spirit and scope of the technical solutions of the present invention.
Claims (7)
1. The sintering flue gas desulfurization system is characterized by comprising a slaked lime slurry supply device, an air supply device, a water storage tank, a three-fluid spray gun, a desulfurization tower, a dust removal device and a flue gas inlet pipeline;
the slaked lime slurry supply device is communicated with the three-fluid spray gun through a fluid pump, the air supply device is communicated with the three-fluid spray gun through a pipeline, and the water storage tank is communicated with the three-fluid spray gun through an infusion pump;
the desulfurizing tower bottom is provided with the flue gas import, the desulfurizing tower is provided with the exhanst gas outlet, the below intercommunication of the exhanst gas inlet of desulfurizing tower has venturi, venturi with advance tobacco pipe way intercommunication, the nozzle of three-fluid spray gun set up in advance on the tobacco pipe way of venturi below, the exhanst gas outlet of desulfurizing tower with dust collector's entry pipeline intercommunication, dust collector's gas outlet has the exhaust pipe through the draught fan intercommunication, the export of draught fan with it has the gas reflux pipe to advance the intercommunication between the tobacco pipe way.
2. The desulfurization system of claim 1, wherein the dust removal device comprises a bag-type dust remover and an ash bin, the bag-type dust remover is provided with an ash collecting hopper, a discharge port of the ash collecting hopper is communicated with the ash bin through a pipeline, a discharge port of the ash collecting hopper is communicated with the smoke inlet pipeline through a dust conveying pipeline, and an outlet of the dust conveying pipeline is positioned on a side wall of the smoke inlet pipeline.
3. The desulfurization system of claim 2, wherein the slaked lime slurry supply device comprises a quicklime bin, a quicklime slaker, a desander and a slurry tank, a discharge port of the quicklime bin is communicated with a feed port of the quicklime slaker, a discharge port of the quicklime slaker is communicated with a feed port of the desander, a discharge port of the desander is communicated with a feed port of the slurry tank, the slurry tank is provided with a process water inlet, and a discharge port of the slurry tank is communicated with the three-fluid spray gun through a fluid pump.
4. The desulfurization system of claim 3, wherein said exhaust conduit is in communication with a stack.
5. The desulfurization system of claim 3, wherein the flue gas outlet of the desulfurization tower is located at the top of the desulfurization tower.
6. The desulfurization system of claim 3, wherein said air supply device is an air compressor pump.
7. The desulfurization system of claim 3, wherein the venturi outlet has a diameter equal to the flue gas inlet diameter of the desulfurization tower.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201921914997.6U CN211358297U (en) | 2019-11-07 | 2019-11-07 | Sintering flue gas desulfurization system |
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| CN201921914997.6U CN211358297U (en) | 2019-11-07 | 2019-11-07 | Sintering flue gas desulfurization system |
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| CN211358297U true CN211358297U (en) | 2020-08-28 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113149467A (en) * | 2021-03-15 | 2021-07-23 | 西安西矿环保科技有限公司 | Quicklime slaking pulping system for semidry flue gas desulfurization |
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2019
- 2019-11-07 CN CN201921914997.6U patent/CN211358297U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113149467A (en) * | 2021-03-15 | 2021-07-23 | 西安西矿环保科技有限公司 | Quicklime slaking pulping system for semidry flue gas desulfurization |
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Address after: 710065 7th floor, block B, Huajing Plaza, No.20, Fenghui South Road, high tech Zone, Xi'an City, Shaanxi Province Patentee after: Xi'an Longjing Environmental Protection Technology Co.,Ltd. Address before: 710065 7th floor, block B, Huajing Plaza, No.20, Fenghui South Road, high tech Zone, Xi'an City, Shaanxi Province Patentee before: XI'AN XIKUANG ENVIRONMENTAL PROTECTION Co.,Ltd. |