CN219942346U - Dry-method flue gas desulfurization device for calcium hydroxide - Google Patents
Dry-method flue gas desulfurization device for calcium hydroxide Download PDFInfo
- Publication number
- CN219942346U CN219942346U CN202320562435.XU CN202320562435U CN219942346U CN 219942346 U CN219942346 U CN 219942346U CN 202320562435 U CN202320562435 U CN 202320562435U CN 219942346 U CN219942346 U CN 219942346U
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- Prior art keywords
- flue gas
- calcium hydroxide
- reaction tower
- inner cylinder
- pipeline
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- 238000006477 desulfuration reaction Methods 0.000 title claims abstract description 53
- 230000023556 desulfurization Effects 0.000 title claims abstract description 53
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 title claims abstract description 52
- 239000003546 flue gas Substances 0.000 title claims abstract description 52
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 title claims abstract description 49
- 239000000920 calcium hydroxide Substances 0.000 title claims abstract description 49
- 229910001861 calcium hydroxide Inorganic materials 0.000 title claims abstract description 47
- 238000000034 method Methods 0.000 title claims description 7
- 238000006243 chemical reaction Methods 0.000 claims abstract description 33
- 239000000428 dust Substances 0.000 claims abstract description 25
- 239000000843 powder Substances 0.000 claims description 29
- 239000000779 smoke Substances 0.000 claims description 29
- 238000007599 discharging Methods 0.000 claims description 16
- 235000019504 cigarettes Nutrition 0.000 claims description 8
- 239000002893 slag Substances 0.000 claims description 8
- 238000009530 blood pressure measurement Methods 0.000 claims description 6
- 235000011116 calcium hydroxide Nutrition 0.000 claims 8
- 230000003009 desulfurizing effect Effects 0.000 abstract description 27
- 239000003795 chemical substances by application Substances 0.000 abstract description 23
- 230000000694 effects Effects 0.000 abstract description 2
- 239000000463 material Substances 0.000 description 6
- 239000006227 byproduct Substances 0.000 description 3
- 239000011575 calcium Substances 0.000 description 3
- 230000005484 gravity Effects 0.000 description 3
- UIIMBOGNXHQVGW-UHFFFAOYSA-M Sodium bicarbonate Chemical compound [Na+].OC([O-])=O UIIMBOGNXHQVGW-UHFFFAOYSA-M 0.000 description 2
- OSGAYBCDTDRGGQ-UHFFFAOYSA-L calcium sulfate Chemical compound [Ca+2].[O-]S([O-])(=O)=O OSGAYBCDTDRGGQ-UHFFFAOYSA-L 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 238000010517 secondary reaction Methods 0.000 description 2
- 238000009423 ventilation Methods 0.000 description 2
- 241000208125 Nicotiana Species 0.000 description 1
- 235000002637 Nicotiana tabacum Nutrition 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 239000003054 catalyst Substances 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000035484 reaction time Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 239000011734 sodium Substances 0.000 description 1
- 229910000030 sodium bicarbonate Inorganic materials 0.000 description 1
- 235000017557 sodium bicarbonate Nutrition 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Abstract
The utility model provides a calcium hydroxide dry flue gas desulfurization device which comprises a desulfurization reaction tower, wherein the lower end of the desulfurization reaction tower is connected with a flue gas inlet pipeline, the upper end of the desulfurization reaction tower is connected with a flue gas outlet pipeline, an induced draft fan and a calcium hydroxide conveying system are sequentially arranged on the flue gas inlet pipeline, the desulfurization reaction tower is connected with a dust collector through the flue gas outlet pipeline, the dust collector is connected with a dust collection fan, the desulfurization reaction tower comprises an outer cylinder connected with the flue gas outlet pipeline and an inner cylinder vertically arranged in the outer cylinder, the top end of the inner cylinder is open, the bottom end of the inner cylinder is vertically provided with a communicating pipe, and the bottom end of the communicating pipe is connected with the flue gas inlet pipeline. The calcium hydroxide dry flue gas desulfurization device provided by the utility model adopts the novel desulfurization reaction tower, and has the advantages of high utilization rate of the calcium hydroxide desulfurizing agent and good desulfurization effect.
Description
Technical Field
The utility model belongs to the technical field of desulfurization, and particularly relates to a calcium hydroxide dry flue gas desulfurization device.
Background
A typical dry desulfurization system is to fully mix and contact desulfurizing agent ultrafine powder (800-1000 meshes sodium bicarbonate) with flue gas, and under the action of proper flue gas temperature, naHCO 3 With SO in flue gas 2 Reacting to form Na 2 SO3、CO 2 And other byproducts, and simultaneously, in a reactor, a flue and a bag-type dust remover, the desulfurizer ultrafine powder and SO in the flue gas 2 Can all react, but NaHCO 3 The price of the catalyst is high, the desulfurization operation cost is high, and byproducts after the desulfurization reaction are not well treated.
Thus, a dry flue gas desulfurization device using calcium hydroxide powder as a desulfurizing agent is produced, however, the existing calcium hydroxide dry flue gas desulfurization device has low desulfurizing agent utilization rate and low desulfurizing efficiency, and the technical problem is solved by the scheme.
Disclosure of Invention
The utility model aims to provide a calcium hydroxide dry flue gas desulfurization device, which solves the technical problems of low utilization rate of desulfurizing agent and low desulfurization efficiency of the existing dry flue gas desulfurization device.
The dry-method calcium hydroxide flue gas desulfurization device comprises a desulfurization reaction tower, wherein the lower end of the desulfurization reaction tower is connected with a flue gas inlet pipeline, the upper end of the desulfurization reaction tower is connected with a flue gas outlet pipeline, a draught fan and a calcium hydroxide conveying system are sequentially arranged on the flue gas inlet pipeline, the desulfurization reaction tower is connected with a dust collector through the flue gas outlet pipeline, and the dust collector is connected with a dust collection fan;
the desulfurization reaction tower comprises an outer cylinder connected with the smoke outlet pipeline and an inner cylinder vertically arranged in the outer cylinder, the outer side of the inner cylinder is connected with the outer cylinder, the top end of the inner cylinder is open, the bottom end of the inner cylinder is vertically provided with a communicating pipe, and the bottom end of the communicating pipe is connected with the smoke inlet pipeline;
the lower extreme of urceolus is provided with the unloading cone, the bottom of unloading cone with the lateral part intercommunication of communicating pipe, the lower part of unloading cone is provided with weight flap valve and the scum pipe, the scum pipe sets up the top position of weight flap valve.
The side below of urceolus is provided with into cigarette branch pipe, advance the entry of cigarette branch pipe with advance tobacco pipe intercommunication, advance the export setting of cigarette branch pipe and be in between urceolus with the inner tube, advance and be provided with the branch pipe valve on the cigarette branch pipe.
The calcium hydroxide conveying system comprises a venturi ejector connected with the smoke inlet pipeline, a blower connected with the air inlet of the venturi ejector, and a calcium hydroxide powder bin connected with the feeding port of the venturi ejector, wherein the discharging port of the venturi ejector is connected with the smoke inlet pipeline.
The pressure measuring device is characterized in that a pressure measuring point I is arranged above the inner side of the inner cylinder, and a pressure measuring point II is arranged below the inner side of the inner cylinder.
And fan frequency converters are arranged on the air blower, the induced draft fan and the dust collection fan.
Compared with the prior art, the utility model has the beneficial effects that:
(1) The desulfurization reaction tower is provided with an outer cylinder and an inner cylinder, the calcium hydroxide desulfurizing agent is sprayed into the inner cylinder through a communicating pipe and mixed with the flue gas for reaction, the desulfurizing agent falls into a blanking cone through a gap between the outer cylinder and the inner cylinder, and enters the communicating pipe from the blanking cone to participate in the reaction again, so that the utilization rate of the calcium hydroxide desulfurizing agent is high, and the desulfurization efficiency is high;
(2) The smoke inlet branch pipe on the outer cylinder is communicated with the smoke inlet pipeline, smoke is sprayed into the cavity between the inner cylinder and the outer cylinder, the smoke and the desulfurizing agent suspend and react, part of the smoke is pretreated, the contact reaction time of the desulfurizing agent and the smoke is longer, and the desulfurizing effect is good;
(3) The calcium hydroxide conveying system is provided with a venturi ejector, calcium hydroxide powder is brought into a smoke inlet pipeline through a blower, and the calcium hydroxide powder is fully mixed with smoke.
Drawings
Fig. 1 is a schematic diagram of the overall structure of the present utility model.
FIG. 2 is a schematic view showing the operation state of the desulfurizing reaction tower of the present utility model.
FIG. 3 is a schematic diagram of the calcium hydroxide delivery system of the present utility model.
Wherein, in the figure: 1. a desulfurization reaction tower; 1-1, an outer cylinder; 1-2, an inner cylinder; 1-3, blanking cone; 1-4, a slag discharging pipe; 1-5, a heavy hammer flap valve; 1-6, communicating pipe; 2. a smoke inlet branch pipe; 3. an induced draft fan; 3-1, a draught fan valve; 4. a blower; 5. a venturi ejector; 6. a calcium hydroxide powder bin; 6-1, a vibrator; 6-2, a powder bin valve; 7. a smoke outlet pipeline; 8. a dust collector; 9. a dust collection fan; 10. a smoke inlet pipeline; 11. a branch pipe valve; 12. a desulfurizing tower bracket; p1, measuring a first pressure point; p2, pressure measuring point II.
Detailed Description
In order to more clearly describe the technical characteristics of the present solution, the present solution is described below by means of specific embodiments.
Referring to fig. 1-3, a dry-method flue gas desulfurization device for calcium hydroxide comprises a desulfurization reaction tower 1, wherein the lower end of the desulfurization reaction tower 1 is connected with a flue gas inlet pipeline 10, the upper end of the desulfurization reaction tower 1 is connected with a flue gas outlet pipeline 7, a draught fan 3 and a calcium hydroxide conveying system are sequentially arranged on the flue gas inlet pipeline 10, the desulfurization reaction tower 1 is connected with a dust collector 8 through the flue gas outlet pipeline 7, and the dust collector 8 is connected with a dust collection fan 9;
the desulfurization reaction tower 1 comprises an outer cylinder 1-1 connected with a smoke outlet pipeline 7, and an inner cylinder 1-2 vertically arranged in the outer cylinder 1-1, wherein the outer side wall of the inner cylinder 1-2 is connected with the inner side wall of the outer cylinder 1-1 through a desulfurization tower bracket 12, the top end of the inner cylinder 1-2 is open, the bottom end of the inner cylinder 1-2 is vertically provided with a communicating pipe 1-6, and the bottom end of the communicating pipe 1-6 is connected with a smoke inlet pipeline 10;
the inner side of the outer cylinder 1-1 and the outer side of the inner cylinder 1-2 form a cavity, a blanking cone 1-3 is arranged below the cavity, the blanking cone 1-3 is arranged at the outer side part of the inner cylinder 1-2, the blanking cone 1-3 is isolated from the inner part of the inner cylinder 1-2 through the side part of the inner cylinder 1-2, the bottom end of the blanking cone 1-3 is communicated with the side part of the communicating pipe 1-6, a heavy hammer flap valve 3 is arranged at the lower part of the blanking cone 1-3, a slag discharging pipe 1-4 is arranged at the upper part of the heavy hammer flap valve 3, and the slag discharging pipe 1-4 is communicated with the side part of the blanking cone 1-3.
The lower side of the outer barrel 1-1 is provided with a smoke inlet branch pipe 2, the inlet of the smoke inlet branch pipe 2 is communicated with a smoke inlet pipeline 10, the outlet of the smoke inlet branch pipe 2 is arranged between the outer barrel 1-1 and the inner barrel 1-2, and a branch pipe valve 11 is arranged on the smoke inlet branch pipe 2.
The calcium hydroxide conveying system comprises a venturi ejector 5 connected with a smoke inlet pipeline 10, a blower 4 connected with an air inlet of the venturi ejector 5, and a calcium hydroxide powder bin 6 connected with a feed inlet of the venturi ejector 5, wherein a powder bin valve 6-2 is arranged between the calcium hydroxide powder bin 6 and the feed inlet of the venturi ejector 5, a vibrator 6-1 is arranged at a discharging position of the calcium hydroxide powder bin 6, and a discharge hole of the venturi ejector 5 is connected with the smoke inlet pipeline 10.
The pressure measuring point I P1 is arranged above the inner side of the inner cylinder 1-2, and the pressure measuring point II P2 is arranged below the inner side of the inner cylinder 1-2.
Fan frequency converters are arranged on the blower 4, the induced draft fan 3 and the dust collection fan 9; an inlet of the induced draft fan 3 is provided with an induced draft fan valve 3-1.
The specific working process of the utility model comprises the following steps:
closing a branch pipe valve 11 and an induced draft fan valve 3-1, starting a dust collection fan 9 and the induced draft fan 3, gradually opening the induced draft fan valve 3-1, adjusting the branch pipe valve 11 to enable part of flue gas to enter a cavity between the inner cylinder 1-2 and the outer cylinder 1-1 through the flue gas inlet branch pipe 2, enabling the other part of flue gas to enter the inner cylinder 1-2 of the desulfurization reaction tower 1 through a communicating pipe 1-6, adjusting a frequency converter of the dust collection fan 9, improving the rotating speed of the dust collection fan 9, and increasing the ventilation quantity of the desulfurization reaction tower 1 until the numerical values of a pressure measurement point I P1 and a pressure measurement point II P2 reach set values;
starting an air blower 4, when the negative pressure of the system is stable, starting a powder bin valve 6-2 under a calcium hydroxide powder bin 6, carrying a calcium hydroxide powder desulfurizing agent into a smoke inlet pipeline 10 through a Venturi ejector 5, carrying the calcium hydroxide powder desulfurizing agent and smoke into a communicating pipe 1-6 through the smoke inlet pipeline 10, fully mixing, and entering an inner barrel 1-2 from the communicating pipe 1-6 for primary reaction;
when the calcium hydroxide powder desulfurizing agent and the flue gas are driven to the upper end of the inner cylinder 1-2 by the air flow, the flow speed is reduced due to the increase of the ventilation section, and the flue gas after desulfurization reaction is discharged to a dust collector through a flue gas outlet above the desulfurization reaction tower 1 and is discharged after being treated by the dust collector;
the calcium hydroxide powder desulfurizing agent is larger than the air current buoyancy under the action of gravity, so that the calcium hydroxide powder desulfurizing agent gradually falls into a cavity between the outer cylinder 1-1 and the inner cylinder 1-2 from top to bottom, then the flue gas from the flue gas inlet branch pipe 2 is mixed with the calcium hydroxide powder desulfurizing agent and reacts for the second time, and then the mixture gradually falls into the discharging cone 1-3;
the calcium hydroxide powder desulfurizing agent after secondary reaction enters a blanking cone 1-3, when a part of desulfurizing agent is accumulated to a certain height above a heavy hammer flap valve 1-5, a flap of the heavy hammer flap valve 1-5 is opened under the action of the gravity of the desulfurizing agent, the desulfurizing agent enters a communicating pipe 1-6 through the heavy hammer flap valve 1-5, and the desulfurizing agent reenters an inner barrel 1-2 to participate in the secondary reaction under the driving of flue gas; the other part of desulfurizing agent is discharged through a slag discharging pipe 1-4 arranged above the heavy hammer flap valve 1-5, and the slag discharging pipe 1-4 is provided with a rotary blanking device to play a role in sealing blanking.
The side blanking part of the calcium hydroxide powder bin 6 is provided with a vibrator 6-1 so that the calcium hydroxide powder smoothly falls into the venturi injector 5 and is discharged.
When the pressure difference between the pressure measurement point I P1 and the pressure measurement point II P2 is increased, the fact that the calcium hydroxide powder desulfurizing agent in the inner cylinder 1-2 is more is indicated, the air quantity of the dust collection fan 9 is properly increased, a certain amount of calcium hydroxide powder is discharged through the slag discharging pipe 1-4, and the air quantity of the air blower 4 is reduced, so that the feeding quantity of the calcium hydroxide powder is reduced, the circulating calcium hydroxide powder in the system is reduced, and the circulating load is reduced; when the pressure difference between the first pressure measuring point P1 and the second pressure measuring point P2 is reduced, the air quantity of the dust collection fan 9 is properly reduced, the air quantity of the blower 4 is increased, and the circulating load of the system is improved.
Ca(OH) 2 SO removal 2 The reaction chemical formula is as follows:
Ca(OH) 2 +SO 2 ＝CaSO 3 ·1/2H 2 O+1/2H 2 O
2CaSO 3 ·1/2H 2 O+O 2 +3H 2 O＝2CaSO 4 ·2H 2 O
using powdered Ca (OH) 2 Instead of NaHCO 3 Removing SO in flue gas 2 The method can greatly reduce the operation cost while ensuring that the desulfurization effect is not reduced, and the calcium sulfate in the desulfurization byproducts can be used as a cement additive or landfill and road repair treatment, so that secondary pollution is not caused.
Venturi ejector theory of operation: when positive pressure air generated by the 4-blower is adopted by the Venturi ejector 5 and flows in through the air inlet of the ejector, the negative pressure generates suction force to suck away materials in the feeding hole above the ejector, and powder, particles and bulk materials are conveyed into the pipeline through the discharging hole.
The weight flap valve 1-5 can discharge and lock air, is an automatic ash discharging device by utilizing the dead weight of materials, the valve plate of the weight flap valve 1-5 is automatically opened under the action of the gravity of the materials, and after the materials fall, the valve plate is automatically reset by a weight lever system to prevent the blowing in of return air, so that the conveying of the materials is completed.
The technical features of the present utility model that are not described in the present utility model may be implemented by or using the prior art, and are not described in detail herein, but the above description is not intended to limit the present utility model, and the present utility model is not limited to the above examples, but is also intended to be within the scope of the present utility model by those skilled in the art.
Claims (5)
1. The utility model provides a calcium hydrate dry flue gas desulfurization device, includes desulfurization reaction tower (1), its characterized in that, the lower extreme of desulfurization reaction tower (1) is connected with into cigarette pipeline (10), the upper end of desulfurization reaction tower (1) is connected with out cigarette pipeline (7), it has draught fan (3), calcium hydrate conveying system to advance to set gradually on cigarette pipeline (10), desulfurization reaction tower (1) is passed through out cigarette pipeline (7) and is connected with dust collector (8), dust collector (8) are connected with dust collecting fan (9);
the desulfurization reaction tower (1) comprises an outer cylinder (1-1) connected with the smoke outlet pipeline (7) and an inner cylinder (1-2) vertically arranged in the outer cylinder (1-1), the outer side of the inner cylinder (1-2) is connected with the outer cylinder (1-1), the top end of the inner cylinder (1-2) is open, a communicating pipe (1-6) is vertically arranged at the bottom end of the inner cylinder (1-2), and the bottom end of the communicating pipe (1-6) is connected with the smoke inlet pipeline (10);
the automatic feeding device is characterized in that a discharging cone (1-3) is arranged at the lower end of the outer barrel (1-1), the bottom end of the discharging cone (1-3) is communicated with the side part of the communicating pipe (1-6), a heavy hammer flap valve (1-5) and a slag discharging pipe (1-4) are arranged at the lower part of the discharging cone (1-3), and the slag discharging pipe (1-4) is arranged at the upper position of the heavy hammer flap valve (1-5).
2. The calcium hydroxide dry flue gas desulfurization device according to claim 1, wherein a flue gas inlet branch pipe (2) is arranged below the side part of the outer barrel (1-1), an inlet of the flue gas inlet branch pipe (2) is communicated with the flue gas inlet pipeline (10), an outlet of the flue gas inlet branch pipe (2) is connected between the outer barrel (1-1) and the inner barrel (1-2), and a branch pipe valve (11) is arranged on the flue gas inlet branch pipe (2).
3. The calcium hydroxide dry flue gas desulfurization device according to claim 1, wherein the calcium hydroxide conveying system comprises a venturi ejector (5) connected with the flue gas inlet pipeline (10), a blower (4) connected with an air inlet of the venturi ejector (5), and a calcium hydroxide powder bin (6) connected with a feed inlet of the venturi ejector (5), and a discharge outlet of the venturi ejector (5) is connected with the flue gas inlet pipeline (10).
4. The dry-method flue gas desulfurization device for calcium hydroxide according to claim 1, wherein a first pressure measurement point (P1) is arranged above the inner side of the inner cylinder (1-2), and a second pressure measurement point (P2) is arranged below the inner side of the inner cylinder (1-2).
5. The calcium hydroxide dry flue gas desulfurization device according to claim 3, wherein fan frequency converters are arranged on the air blower (4), the induced draft fan (3) and the dust collection fan (9).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320562435.XU CN219942346U (en) | 2023-03-21 | 2023-03-21 | Dry-method flue gas desulfurization device for calcium hydroxide |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320562435.XU CN219942346U (en) | 2023-03-21 | 2023-03-21 | Dry-method flue gas desulfurization device for calcium hydroxide |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219942346U true CN219942346U (en) | 2023-11-03 |
Family
ID=88547669
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320562435.XU Active CN219942346U (en) | 2023-03-21 | 2023-03-21 | Dry-method flue gas desulfurization device for calcium hydroxide |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219942346U (en) |
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- 2023-03-21 CN CN202320562435.XU patent/CN219942346U/en active Active
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