CN210473593U - Cement plant kiln tail flue gas cooling desulfurization increase system - Google Patents
Cement plant kiln tail flue gas cooling desulfurization increase system Download PDFInfo
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- CN210473593U CN210473593U CN201920897166.6U CN201920897166U CN210473593U CN 210473593 U CN210473593 U CN 210473593U CN 201920897166 U CN201920897166 U CN 201920897166U CN 210473593 U CN210473593 U CN 210473593U
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Abstract
The utility model discloses a cement plant kiln tail flue gas cooling desulfurization increase system, including raw meal grinding system, flue gas mixer, lime powder injection apparatus, bag dust removal reactor and wet flue gas desulfurization tower, the export of kiln tail flue gas respectively with the import of raw meal grinding system, flue gas mixer's access connection, raw meal grinding system's export, flue gas mixer's export all is connected with lime powder injection apparatus's feed inlet, lime powder injection apparatus, bag dust removal reactor, wet flue gas desulfurization tower, the chimney is connected in order, bypass pipeline and flue gas mixer's access connection is passed through in wet flue gas desulfurization tower's export. The utility model discloses a raw material grinding system dries the cooling to kiln tail flue gas, when raw material grinding system was out of work, adopts wet flue gas of wet flue gas desulfurization tower exhaust to dry the cooling to kiln tail flue gas, has guaranteed to get into in the wet flue gas desulfurization tower kiln tail flue gas and is less than 160 ℃, guarantees the normal work of wet flue gas desulfurization tower.
Description
Technical Field
The utility model relates to a cement plant kiln tail flue gas handles the field, specifically is a cement plant kiln tail flue gas cooling desulfurization increase system.
Background
With the restriction of the nation on mine exploitation and the reduction of the stock of high-quality limestone, many cement plants have to use low-grade limestone, which causes SO in the kiln tail flue gas2Out of standard, in order to reduce SO in kiln tail flue gas2The desulfurization is carried out by a wet process (kiln dust-gypsum method). However, the temperature of the kiln tail flue gas is high, and if the kiln tail flue gas directly enters the wet desulphurization tower, the kiln tail flue gas can damage the anti-corrosion material glass flakes in the wet desulphurization tower.
The cement factory will adopt the hot flue gas at the kiln tail to dry the raw material grinding system, the raw material system will produce a large amount of limestone fine powder, the limestone fine powder will be mixed with part of S in the flue gasO2Reaction, but the running synchronization rate of the raw material mill system and the kiln system is about 85%, when the raw material mill system stops running (the flue gas temperature is increased), the air volume of the actual working condition is increased, and after the air volume directly enters the kiln tail dust collector, the resistance of the dust collector and the power consumption of the tail exhaust fan can be increased; without a large amount of raw meal fine powder, the concentration of SO2 in the flue gas is increased, and the load of a wet desulphurization system is greatly increased.
SUMMERY OF THE UTILITY MODEL
The to-be-solved technical problem of the utility model is to provide a cement plant kiln tail flue gas cooling desulfurization increase system, adopt raw material grinding system to dry the cooling to kiln tail flue gas, when raw material grinding system is out of work, adopt wet flue gas of wet flue gas desulfurization tower exhaust to dry the cooling to kiln tail flue gas, guaranteed to get into in the wet flue gas desulfurization tower kiln tail flue gas and be less than 160 ℃, guarantee the normal work of wet flue gas desulfurization tower.
The technical scheme of the utility model is that:
the utility model provides a cement plant kiln tail flue gas cooling desulfurization increase system, including raw material grinding system, flue gas mixer, lime powder injection apparatus, bag-type dust removal reactor and wet flue gas desulfurization tower, the export of cement plant kiln tail flue gas pass through the inlet connection of admission line respectively with the import of raw material grinding system, flue gas mixer, the export of raw material grinding system, flue gas mixer all be connected with lime powder injection apparatus's feed inlet, lime powder injection apparatus's injection outlet and bag-type dust removal reactor's access connection, bag-type dust removal reactor's export and wet flue gas desulfurization tower's access connection, wet flue gas desulfurization tower's export pass through the exhaust pipe and be connected with the chimney, the exhaust pipe on be connected with the bypass pipeline, wet flue gas desulfurization tower's export pass through bypass pipeline and flue gas mixer's access connection.
And an electromagnetic bypass valve is arranged at the joint of the discharge pipeline and the bypass pipeline, and the electromagnetic bypass valve and the raw material grinding system are both connected with a controller.
The bypass pipeline is provided with a booster fan, the outlet of the wet desulphurization tower is connected with the inlet of the booster fan through the bypass pipeline, and the outlet of the booster fan is connected with the inlet of the flue gas mixer through the bypass pipeline.
And the outlet of the bag-type dust removal reactor is connected with the inlet of the wet desulphurization tower through a flue gas induced draft fan.
The utility model has the advantages that:
(1) the utility model is provided with a raw material grinding system, the temperature of kiln tail flue gas is reduced to about 200 ℃ after waste heat power generation, then hot flue gas enters the raw material grinding system to dry the material, the dried flue gas can reach about 120 ℃, and then enters a subsequent bag-type dust removal reactor and a wet desulphurization tower to carry out dust removal and desulphurization treatment, so that the damage of anticorrosive material glass flakes in the wet desulphurization tower caused by overhigh temperature is avoided;
(2) the raw material grinding system and the kiln system of the utility model have a synchronous operation rate of 85% approximately, when the raw material grinding system and the kiln system are asynchronous, namely an air inlet valve of the raw material grinding system is closed, hot flue gas can enter a flue gas mixer to be mixed with wet flue gas discharged by a wet desulphurization tower at the moment, so that the hot flue gas is humidified and cooled to 150 ℃, and then enters a follow-up bag type dust removal reactor and the wet desulphurization tower to be subjected to dust removal and desulphurization treatment, thereby avoiding the damage of anticorrosive material glass flakes in the wet desulphurization tower caused by overhigh temperature;
(3) the utility model discloses set up lime powder injection apparatus before bag type dust removal reactor, improve flue gas desulfurization's calcium-sulfur ratio through calcium-based absorbent-lime powder.
(4) The flue gas before entering the dust remover is humidified and is supplemented with calcium-based absorbent-lime powder, so that the desulfurization efficiency of the bag type dust remover can be effectively improved, and the operation load of wet desulfurization is reduced.
Drawings
Fig. 1 is a schematic structural diagram of the present invention, wherein "- - -" is a saturated wet flue gas pipeline, and "- -" is a kiln tail hot flue gas pipeline.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
Referring to fig. 1, a cement plant kiln tail flue gas cooling and desulfurization synergistic system comprises a raw material grinding system 1, a flue gas mixer 2, a lime powder injection device 3, a bag-type dust removal reactor 4 and a wet desulphurization tower 6, wherein an outlet of kiln tail flue gas of the cement plant is respectively connected with an inlet of the raw material grinding system 1 and an inlet of the flue gas mixer 2 through an air inlet pipeline, an outlet of the raw material grinding system 1 and an outlet of the flue gas mixer 2 are both connected with a feed inlet of the lime powder injection device 3, an injection outlet of the lime powder injection device 3 is connected with an inlet of the bag-type dust removal reactor 4, an outlet of the bag-type dust removal reactor 4 is connected with an inlet of the wet desulphurization tower 6 through a flue gas induced draft fan 5, an outlet of the wet desulphurization tower 6 is connected with a chimney 7 through an exhaust pipeline, a bypass pipeline is connected on the exhaust pipeline, a booster fan 8 is arranged on the bypass pipeline, an outlet of the wet desulphurization tower 6 is connected, the outlet of the booster fan 8 is connected with the inlet of the flue gas mixer 2 through a bypass pipeline, an electromagnetic bypass valve 9 is arranged at the joint of the discharge pipeline and the bypass pipeline, and the electromagnetic bypass valve 9 and the raw material grinding system 1 are both connected with the controller.
When an air inlet valve of the raw material grinding system 1 is opened, the temperature of kiln tail flue gas is reduced to about 200 ℃ after waste heat power generation, then hot flue gas enters the raw material grinding system to dry materials, the temperature of the dried flue gas is reduced to about 120 ℃, and then the flue gas enters a subsequent bag-type dust removal reactor and a wet desulfurization tower to be subjected to dust removal and desulfurization treatment; when the air inlet valve of the raw material grinding system 1 is not opened, the controller collects the opening and closing amount of the air inlet valve of the raw material grinding system 1, then the electromagnetic bypass valve 9 is controlled to be opened, at the moment, wet flue gas discharged by the wet desulphurization tower enters the flue gas mixer to be mixed with hot flue gas at the tail of the kiln, so that the hot flue gas is humidified and cooled to 150 ℃, and then enters the subsequent bag-type dust removal reactor and the wet desulphurization tower to be subjected to dust removal and desulphurization treatment, and the flue gas reaching the standard is discharged to the atmosphere through the chimney 7.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (4)
1. The utility model provides a cement plant kiln tail flue gas cooling desulfurization increase system which characterized in that: including raw meal grinding system, flue gas mixer, lime powder injection apparatus, bag dust removal reactor and wet flue gas desulfurization tower, cement plant kiln tail flue gas the export pass through the admission line respectively with the import of raw meal grinding system, the access connection of flue gas mixer, the export of raw meal grinding system, the export of flue gas mixer all be connected with lime powder injection apparatus's feed inlet, lime powder injection apparatus's the import of jet outlet and bag dust removal reactor is connected, the export of bag dust removal reactor and the access connection of wet flue gas desulfurization tower, the export of wet flue gas desulfurization tower pass through discharge tube and chimney and be connected, discharge tube on be connected with the bypass pipeline, the export of wet flue gas desulfurization tower pass through bypass tube and flue gas mixer's access connection.
2. The cement plant kiln tail flue gas cooling, desulfurizing and efficiency improving system according to claim 1, characterized in that: and an electromagnetic bypass valve is arranged at the joint of the discharge pipeline and the bypass pipeline, and the electromagnetic bypass valve and the raw material grinding system are both connected with a controller.
3. The cement plant kiln tail flue gas cooling, desulfurizing and efficiency improving system according to claim 1, characterized in that: the bypass pipeline is provided with a booster fan, the outlet of the wet desulphurization tower is connected with the inlet of the booster fan through the bypass pipeline, and the outlet of the booster fan is connected with the inlet of the flue gas mixer through the bypass pipeline.
4. The cement plant kiln tail flue gas cooling, desulfurizing and efficiency improving system according to claim 1, characterized in that: and the outlet of the bag-type dust removal reactor is connected with the inlet of the wet desulphurization tower through a flue gas induced draft fan.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201920897166.6U CN210473593U (en) | 2019-06-14 | 2019-06-14 | Cement plant kiln tail flue gas cooling desulfurization increase system |
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| CN201920897166.6U CN210473593U (en) | 2019-06-14 | 2019-06-14 | Cement plant kiln tail flue gas cooling desulfurization increase system |
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| CN210473593U true CN210473593U (en) | 2020-05-08 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110237693A (en) * | 2019-06-14 | 2019-09-17 | 合肥中亚环保科技有限公司 | A kind of cement plant kiln exit gas cooling, desulfurizing synergistic device |
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2019
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110237693A (en) * | 2019-06-14 | 2019-09-17 | 合肥中亚环保科技有限公司 | A kind of cement plant kiln exit gas cooling, desulfurizing synergistic device |
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