CN211636020U - Desulfurization and denitrification dust removal system with humidification and activation functions - Google Patents
Desulfurization and denitrification dust removal system with humidification and activation functions Download PDFInfo
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- CN211636020U CN211636020U CN201921855274.3U CN201921855274U CN211636020U CN 211636020 U CN211636020 U CN 211636020U CN 201921855274 U CN201921855274 U CN 201921855274U CN 211636020 U CN211636020 U CN 211636020U
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Abstract
The utility model provides a desulfurization denitration dust pelletizing system of humidification activation, desulfurization denitration dust pelletizing system include desulfurization denitration dust collector, desulfurization denitration dust collector include along the flue gas flow direction includingThe device comprises a desulfurization and denitrification reaction chamber and a settling chamber which are communicated with each other, wherein a barrel body part of the desulfurization and denitrification reaction chamber extends into the settling chamber; the top of the desulfurization and denitrification reaction chamber is provided with a two-fluid injection device, and the two-fluid injection device is used for injecting catalyst slurry and compressed air into the desulfurization and denitrification reaction chamber. Spraying the desulfurization and denitrification catalyst slurry by atomization to remove SO in the flue gas2Absorption of NOxConversion to nitrate or reduction to N2The contact area of the flue gas and the catalyst slurry is increased after the flue gas is contacted with the atomized particles formed by the catalyst slurry, the agglomeration of the smoke particles is facilitated, and the agglomerated smoke particles enable dust particles in the flue gas to freely settle through the settling chamber, so that the functions of desulfurization, denitration and dust removal are achieved at the same time.
Description
Technical Field
The utility model belongs to the technical field of flue gas purification, a SOx/NOx control dust pelletizing system is related to, especially relate to a SOx/NOx control dust pelletizing system of humidification activation.
Background
Currently, most of desulfurization, denitration and dust removal in boiler flue gas treatment application are independent application systems, the commonly used desulfurization technology is the technologies of desulfurization in a mixing furnace of a raw material and a desulfurizer, calcium spraying in the furnace, wet desulfurization and the like, the commonly used denitration technology is the technologies of SNCR, SCR, COA, low-temperature catalyst denitration and the like, and the commonly used dust removal technology is cloth bag dust removal, electric dust removal, and electric bag recoveryCombine techniques such as dust removal, present humidification activation tower is mostly water spray, makes the particulate matter reunion carry out the dust fall, and the flue gas is high-in low-out structure, only handles the smoke and dust, above technique can only be to SO2、NOxAnd one of the dust is removed, and the method has the different defects of wide occupied area, large investment, high operation and maintenance cost and the like.
CN104785078A discloses a flue gas purification device for humidifying and activating circulating ash in a furnace after a calcium spraying furnace in the furnace, which comprises a furnace calcium spraying system, a furnace humidifying and activating system and a circulating ash system; the in-furnace calcium spraying system comprises a lime powder storage bin, a lime powder metering bin, a rotary feeder, a jet pump, a limestone conveying and air distributing machine and a heating fan; the furnace rear humidification and activation system comprises a humidification and activation tower, an atomization spray gun, a process water control system and a water supply tank; the circulating ash system comprises a desulfurizing tower, a bag-type dust collector, a return ash chute and a new lime powder feeding conveying pipe; the discharge port of the new lime powder feeding conveying pipe is connected to the new lime powder feeding port of the desulfurizing tower through the feeding pipe.
CN206881509U discloses a desulfurization, denitrification and dedusting integrated device, which comprises a rectangular box body, wherein an air inlet pipe is arranged on the left side of the rectangular box body, an air outlet pipe is arranged on the right side of the rectangular box body, a first vertical partition plate and a second vertical partition plate are arranged in the rectangular box body, the inner cavity of the rectangular box body is divided into a dedusting cavity, a denitrification cavity and a desulfurization cavity by the first partition plate and the second partition plate, a filter frame is arranged in the dedusting cavity, a vertical filter screen is arranged on the filter frame, heating wires are pre-embedded in the first partition plate and the second partition plate, a heat insulation layer is connected to one side of the first partition plate and the second partition plate, which is far away from the denitrification cavity, a first air guide pipe communicated with the dedusting cavity and the denitrification cavity is arranged on the upper side of the first partition plate, a second air guide pipe communicated with the denitrification cavity and the desulfurization cavity is arranged on the, the washing intracavity is equipped with the washing liquid, and the second end of air duct stretches into under the washing liquid level, and three upside of baffle are equipped with air duct three, are equipped with an aqueous ammonia nozzle on the rectangle box at desulfurization minute chamber top.
CN204478093U discloses a multi-bend gas purification system, which comprises a multi-bend, a dust-containing gas inlet and a dust-removing gas outlet; partition walls are arranged on the upper wall and the lower wall or the left wall and the right wall of the multiple bends at intervals; the multi-bend pipeline is provided with a burner, the lower part of the multi-bend pipeline is provided with a slag pool, the slag pool is of a conical structure, and the slag pool is connected with a slag outlet; the dust-containing gas inlet is connected with a factory boiler tail gas system, and the dust-removing gas outlet is connected with a waste heat power generation system; the multiple bends are provided with viscous low-melting-point material nozzles, and the viscous low-melting-point material nozzles are positioned on the upper parts or the side walls of the multiple bends.
In summary, there is no integrated purification treatment system for performing desulfurization, denitrification and dust removal on boiler flue gas, and therefore, it is urgently needed to design a treatment system for performing desulfurization, denitrification and dust removal on boiler flue gas.
SUMMERY OF THE UTILITY MODEL
To the deficiency that prior art exists, the utility model aims to provide a desulfurization denitration dust pelletizing system of humidification activation and use its processing method spout into desulfurization denitration catalyst thick liquid through the atomizing, with the SO in the flue gas2Absorption of NOxConversion to nitrate or reduction to N2The contact area of the flue gas and the catalyst slurry is increased after the flue gas is contacted with the atomized particles formed by the catalyst slurry, the agglomeration of the smoke particles is facilitated, and the agglomerated smoke particles enable dust particles in the flue gas to freely settle through the settling chamber, so that the functions of desulfurization, denitration and dust removal are achieved at the same time.
To achieve the purpose, the utility model adopts the following technical proposal:
in a first aspect, the utility model provides a SOx/NOx control dust pelletizing system of humidification activation, SOx/NOx control dust pelletizing system include SOx/NOx control dust collector, SOx/NOx control dust collector along flue gas flow direction including SOx/NOx control reacting chamber and the deposit room of intercommunication from top to bottom, SOx/NOx control reacting chamber's barrel part stretch into in the deposit room.
The top of the desulfurization and denitrification reaction chamber is provided with a two-fluid injection device, and the two-fluid injection device is used for injecting catalyst slurry and compressed air into the desulfurization and denitrification reaction chamber.
Spraying the desulfurization and denitrification catalyst slurry by atomization to remove SO in the flue gas2Absorption of NOxConversion to nitrate or reduction to N2The contact area of the flue gas and the catalyst slurry is increased after the flue gas is contacted with the atomized particles formed by the catalyst slurry, the agglomeration of the smoke particles is facilitated, and the agglomerated smoke particles enable dust particles in the flue gas to freely settle through the settling chamber, so that the functions of desulfurization, denitration and dust removal are achieved at the same time.
As an optimal technical scheme, the barrel of SOx/NOx control reacting chamber stretches into 1/3 ~ 1/2 that highly account for SOx/NOx control reacting chamber overall height that subsides the chamber part.
As an optimal technical scheme, SOx/NOx control reaction chamber upper portion be provided with the flue gas entry.
Preferably, a flue gas uniform distribution plate is arranged in the desulfurization and denitrification reaction chamber below the flue gas inlet.
As a preferred technical scheme of the utility model, the flue gas uniform distribution plate is of an annular structure, the annular outer edge of the flue gas uniform distribution plate is tightly attached to the inner wall of the cylinder body of the desulfurization and denitrification reaction chamber, and the annular inner edge of the flue gas uniform distribution plate is tightly attached to the outer wall of the cylinder body of the air inlet pipe; the flue gas is uniformly dispersed by the flue gas uniform distribution plate and then is contacted with the mixed liquid of the compressed air and the catalyst slurry.
As an optimal technical scheme, settling chamber upper portion be provided with at least one exhanst gas outlet, the flue gas lets in the settling chamber after desulfurization and denitrification reacting chamber bottom is discharged, the flue gas upwards turns back after reacing the settling chamber bottom and is discharged by the exhanst gas outlet.
As a preferred technical scheme of the utility model, two fluid injection apparatus include that the feed liquor pipe and the cover of inlayer locate the intake pipe in its outside, leave the transport space that supplies compressed air to flow between feed liquor pipe and the intake pipe.
The bottom of the air inlet pipe is provided with a mixing area, and the catalyst slurry and the compressed air are injected from the liquid inlet pipe and the air inlet pipe respectively and are sprayed out after being mixed in the mixing area.
As a preferred technical scheme of the utility model, two fluid injection apparatus's bottom be provided with atomizing nozzle, catalyst thick liquid is spouted by atomizing nozzle after mixing with compressed air.
The atomizing nozzle is a spiral nozzle.
Injecting catalyst slurry and compressed air into the liquid inlet pipe and the gas inlet pipe respectively, mixing the catalyst slurry and the compressed air in a mixing area at the bottom of the gas inlet pipe, and spraying the mixture into the desulfurization and denitrification reaction chamber through an atomizing nozzle to achieve the optimal atomization effect, wherein the catalyst slurry is sprayed into the desulfurization and denitrification reaction chamber to be in contact with flue gas and fully mixed, and the catalyst slurry absorbs SO2 in the flue gas under the reaction condition of 100 ℃ plus 150 ℃ and simultaneously absorbs NOxConversion to nitrate or reduction to N2In addition, atomized catalyst slurry is favorable for agglomeration of dust particles in flue gas, the particle size of the dust particles is increased, the settling efficiency of the flue gas in the settling chamber is improved, large particles in the flue gas settle when passing through the settling chamber, the settled flue gas turns back and flows upwards and is discharged from a flue gas outlet at the upper part of the settling chamber, and therefore the comprehensive treatment purpose of desulfurization, denitrification and dust removal is achieved.
As an optimal technical scheme, SOx/NOx control dust collector still include the collection liquid room with the deposit room intercommunication, collection liquid room bottom connect and establish the drainage pipeline.
Preferably, a drain valve is arranged on the drain pipeline.
As a preferred technical scheme of the utility model, the system for humidifying, activating, desulfurizing, denitrifying and dedusting further comprises a catalyst slurry preparation unit and a compressed air supply unit.
The catalyst slurry preparation unit is connected with the liquid inlet of the liquid inlet pipe.
The compressed air supply unit is connected with an air inlet of the air inlet pipe.
As an optimized technical scheme of the utility model, catalyst thick liquid preparation unit including agitating unit, conveyor and the liquid flow detection device who connects gradually.
The compressed air supply device comprises an air compressor and an air flow detection device which are connected in sequence.
The catalyst is stirred in a stirring tank and fully mixed with the solvent to prepare catalyst slurry, the catalyst slurry is conveyed to a double-fluid injection device through a conveying device, compressed air is prepared through an air compressor and conveyed to the double-fluid injection device, the flow ratio of the catalyst slurry to the compressed air is respectively controlled through respective flow detection devices and pipeline valves, the catalyst slurry and the compressed air are sprayed out through an atomizing nozzle after being mixed in the double-fluid injection device, the catalyst slurry achieves the best atomizing effect by controlling the atomizing characteristic of the atomizing nozzle, and therefore the reaction rate and the desulfurization and denitrification effects of the catalyst are improved.
Adopt the utility model provides a method for boiler flue gas is handled to SOx/NOx control dust pelletizing system specifically includes following step:
the method comprises the following steps that (I) a catalyst slurry preparation unit and a compressed air supply unit respectively convey catalyst slurry and compressed air to a two-fluid injection device, and the catalyst slurry and the compressed air are mixed in the two-fluid injection device and then are injected into a desulfurization and denitrification reaction chamber through an atomizing nozzle;
(II) introducing boiler flue gas into the desulfurization and denitrification reaction chamber, and completing desulfurization and denitrification after the boiler flue gas is contacted with the mixed liquid of the catalyst slurry and the compressed air in the desulfurization and denitrification reaction chamber;
(III) enabling the flue gas after desulfurization and denitrification to enter a settling chamber for natural settling, and enabling the flue gas reaching the bottom of the settling chamber to return upwards and flow back and be discharged from a flue gas outlet; unreacted catalyst slurry falls into a liquid collecting chamber and is discharged by a liquid discharging pipeline;
the numerical range of the present invention includes not only the point values listed above, but also any point values between the above numerical ranges not listed, which is limited to space and for the sake of brevity, the present invention does not exhaust the specific point values included in the range.
The system refers to an equipment system, or a production equipment.
Compared with the prior art, the beneficial effects of the utility model are that:
spraying the desulfurization and denitrification catalyst slurry by atomization to remove SO in the flue gas2Absorption of NOxConversion to nitrate or reduction to N2The contact area of the flue gas and the catalyst slurry is increased after the flue gas is contacted with the atomized particles formed by the catalyst slurry, the agglomeration of the smoke particles is facilitated, and the agglomerated smoke particles enable dust particles in the flue gas to freely settle through the settling chamber, so that the functions of desulfurization, denitration and dust removal are achieved at the same time.
Drawings
FIG. 1 is a schematic structural view of a desulfurization, denitrification and dust removal device according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a desulfurization, denitrification and dust removal system provided by a specific embodiment of the present invention.
Wherein, 1-air inlet pipe; 2-a smoke uniform distribution plate; 3-an atomizing nozzle; 4-a desulfurization and denitrification reaction chamber; 5-a settling chamber; 6-a liquid collection chamber; 7-a drain valve; 8-a flue gas outlet; 9-flue gas inlet; 10-a compressed air inlet; 11-a liquid inlet pipe; 12-a desulfurization, denitrification and dust removal device; 13-a catalyst slurry preparation unit; 14-compressed air supply unit.
Detailed Description
The technical solution of the present invention is further explained by the following embodiments with reference to the accompanying drawings.
In a specific embodiment, the utility model provides a desulfurization denitration dust pelletizing system of humidification activation desulfurization denitration dust pelletizing system as shown in fig. 2, including desulfurization denitration dust collector 12, desulfurization denitration dust collector 12 is as shown in fig. 1, including desulfurization denitration reacting chamber 4 and deposit room 5 of intercommunication from top to bottom along the flue gas flow direction, in the barrel part of desulfurization denitration reacting chamber 4 stretched into deposit room 5, the barrel of desulfurization denitration reacting chamber 4 stretched into 5 parts of deposit room highly account for 1/3 ~ 1/2 of desulfurization denitration reacting chamber 4 overall height.
The upper part of the settling chamber 5 is provided with at least one flue gas outlet 8, flue gas is discharged from the bottom of the desulfurization and denitrification reaction chamber 4 and then is introduced into the settling chamber 5, and the flue gas returns upwards after reaching the bottom of the settling chamber 5 and is discharged from the flue gas outlet 8.
The top of the desulfurization and denitrification reaction chamber 4 is provided with a two-fluid injection device, and the two-fluid injection device is used for injecting catalyst slurry and compressed air into the desulfurization and denitrification reaction chamber 4.
The double-fluid injection device is of a sleeve structure, the intake pipe 1 outside the double-fluid injection device is arranged by the liquid inlet pipe 11 and the sleeve in the inner layer, a conveying space for compressed air to flow is reserved between the liquid inlet pipe 11 and the intake pipe 1, a mixing area is reserved at the bottom of the intake pipe 1, a compressed air inlet 10 is formed in the intake pipe 1, and catalyst slurry and compressed air are injected by the liquid inlet pipe 11 and the intake pipe 1 respectively and are sprayed out after being mixed in the mixing area. The bottom of the two-fluid injection device is provided with an atomizing nozzle 3, and the catalyst slurry is mixed with compressed air and then is sprayed out from the atomizing nozzle 3.
The upper part of the desulfurization and denitrification reaction chamber 4 is provided with a flue gas inlet 9, and a flue gas uniform distribution plate 2 is arranged inside the desulfurization and denitrification reaction chamber 4 below the flue gas inlet 9. The flue gas uniform distribution plate 2 is of an annular structure, the annular outer edge of the flue gas uniform distribution plate 2 is tightly attached to the inner wall of the cylinder of the desulfurization and denitrification reaction chamber 4, the annular inner edge of the flue gas uniform distribution plate 2 is tightly attached to the outer wall of the cylinder of the air inlet pipe 1, and flue gas is uniformly dispersed by the flue gas uniform distribution plate 2 and then contacts with mixed liquid of compressed air and catalyst slurry.
The desulfurization denitration dust collector 12 also comprises a liquid collection chamber 6 communicated with the settling chamber 5, the bottom of the liquid collection chamber 6 is connected with a liquid discharge pipeline, and a liquid discharge valve 7 is arranged on the liquid discharge pipeline.
The humidifying, activating, desulfurizing, denitrifying and dedusting system also comprises a catalyst slurry preparation unit 13 and a compressed air supply unit 14, wherein the catalyst slurry preparation unit 13 is connected with a liquid inlet of the liquid inlet pipe 11, and the compressed air supply unit 14 is connected with an air inlet of the air inlet pipe 1. The catalyst slurry preparation unit 13 includes a stirring device, a conveying device, and a liquid flow detection device, which are connected in sequence, and the compressed air supply device includes an air compressor and a gas flow detection device, which are connected in sequence.
In another embodiment, the utility model provides a method for flue gas desulfurization and denitration by adopting the above desulfurization, denitration and dust removal system, the method specifically include the following steps:
the catalyst slurry preparation unit 13 and the compressed air supply unit 14 respectively convey the catalyst slurry and the compressed air to the two-fluid injection device, and the catalyst slurry and the compressed air are mixed in the two-fluid injection device and then are injected into the desulfurization and denitrification reaction chamber 4 through the atomizing nozzle 3;
(II) introducing flue gas into the desulfurization and denitrification reaction chamber 4, and contacting the flue gas with a mixed solution of catalyst slurry and compressed air in the desulfurization and denitrification reaction chamber 4 to complete desulfurization and denitrification;
(III) enabling the flue gas after desulfurization and denitrification to enter a settling chamber 5 for natural settling, and enabling the flue gas reaching the bottom of the settling chamber 5 to return upwards and flow back and be discharged from a flue gas outlet 8; the unreacted catalyst slurry falls into the liquid collecting chamber 6 and is discharged through a drain line.
The applicant states that the above description is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and those skilled in the art should understand that any changes or substitutions easily conceivable by those skilled in the art within the technical scope of the present invention are within the protection scope and the disclosure scope of the present invention.
Claims (12)
1. A humidification-activated desulfurization, denitrification and dust removal system is characterized by comprising a desulfurization, denitrification and dust removal device, wherein the desulfurization, denitrification and dust removal device comprises a desulfurization, denitrification reaction chamber and a settling chamber which are communicated up and down along the flow direction of flue gas, and the barrel part of the desulfurization, denitrification reaction chamber extends into the settling chamber;
the top of the desulfurization and denitrification reaction chamber is provided with a two-fluid injection device, and the two-fluid injection device is used for injecting catalyst slurry and compressed air into the desulfurization and denitrification reaction chamber.
2. The desulfurization, denitrification and dust removal system according to claim 1, wherein the height of the cylinder of the desulfurization and denitrification reaction chamber extending into the settling chamber part is 1/3-1/2 of the total height of the desulfurization and denitrification reaction chamber.
3. The desulfurization, denitrification and dust removal system according to claim 2, wherein the upper part of the desulfurization and denitrification reaction chamber is provided with a flue gas inlet;
and a flue gas uniform distribution plate is arranged in the desulfurization and denitrification reaction chamber below the flue gas inlet.
4. The desulfurization, denitrification and dust removal system according to claim 3, wherein the flue gas uniform distribution plate is of an annular structure, the annular outer edge of the flue gas uniform distribution plate is tightly attached to the inner wall of the cylinder of the desulfurization and denitrification reaction chamber, and the annular inner edge of the flue gas uniform distribution plate is tightly attached to the outer wall of the cylinder of the gas inlet pipe; the flue gas is uniformly dispersed by the flue gas uniform distribution plate and then is contacted with the mixed liquid of the compressed air and the catalyst slurry.
5. The desulfurization, denitrification and dust removal system of claim 4, wherein the upper part of the settling chamber is provided with at least one flue gas outlet, the flue gas is discharged from the bottom of the desulfurization and denitrification reaction chamber and then introduced into the settling chamber, and the flue gas turns upwards after reaching the bottom of the settling chamber and then is discharged from the flue gas outlet.
6. The desulfurization, denitrification and dust removal system according to claim 5, wherein the two-fluid injection device comprises an inner liquid inlet pipe and an outer air inlet pipe sleeved on the inner liquid inlet pipe, and a conveying space for compressed air to flow is reserved between the liquid inlet pipe and the air inlet pipe;
the bottom of the air inlet pipe is provided with a mixing area, and the catalyst slurry and the compressed air are injected from the liquid inlet pipe and the air inlet pipe respectively and are sprayed out after being mixed in the mixing area.
7. The desulfurization, denitrification and dust removal system according to claim 6, wherein the bottom of the two-fluid injection device is provided with an atomizing nozzle, and the catalyst slurry is mixed with the compressed air and then sprayed out from the atomizing nozzle;
the atomizing nozzle is a spiral nozzle.
8. The desulfurization, denitrification and dust removal system of claim 7, wherein the desulfurization, denitrification and dust removal device further comprises a liquid collection chamber communicated with the settling chamber, and the bottom of the liquid collection chamber is connected with a liquid drainage pipeline.
9. The desulfurization, denitrification and dust removal system according to claim 8, wherein a drain valve is arranged on the drain pipeline.
10. The desulfurization, denitrification and dust removal system according to claim 9, wherein said humidification activation desulfurization, denitrification and dust removal system further comprises a catalyst slurry preparation unit and a compressed air supply unit;
the catalyst slurry preparation unit is connected with the liquid inlet of the liquid inlet pipe;
the compressed air supply unit is connected with an air inlet of the air inlet pipe.
11. The desulfurization, denitrification and dust removal system according to claim 10, wherein the catalyst slurry preparation unit comprises a stirring device, a conveying device and a liquid flow detection device which are connected in sequence.
12. The desulfurization, denitrification and dust removal system according to claim 11, wherein the compressed air supply device comprises an air compressor and a gas flow detection device which are connected in sequence.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110605021A (en) * | 2019-10-31 | 2019-12-24 | 兖矿集团有限公司 | Humidification-activated desulfurization, denitrification and dust removal system and treatment method using same |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110605021A (en) * | 2019-10-31 | 2019-12-24 | 兖矿集团有限公司 | Humidification-activated desulfurization, denitrification and dust removal system and treatment method using same |
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