CN213120123U - Desulfurization and denitrification flue gas circulation system - Google Patents
Desulfurization and denitrification flue gas circulation system Download PDFInfo
- Publication number
- CN213120123U CN213120123U CN202020959751.7U CN202020959751U CN213120123U CN 213120123 U CN213120123 U CN 213120123U CN 202020959751 U CN202020959751 U CN 202020959751U CN 213120123 U CN213120123 U CN 213120123U
- Authority
- CN
- China
- Prior art keywords
- pipeline
- flue gas
- ultra
- clean
- circulating
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Landscapes
- Treating Waste Gases (AREA)
Abstract
The utility model discloses a desulfurization and denitrification flue gas circulation system, which comprises a main flue purification system and a circulation purification system; the main flue purification system comprises a smoke inlet, a fan, an inlet valve, a purification tower, a discharge chimney, a smoke inlet pipeline and a discharge pipeline; the circulating purification system comprises an ultra-clean circulating pipeline, a fan, a circulating valve and a flowmeter; the ultra-clean circulating pipeline is arranged as a branch of the discharge pipeline, one end of the ultra-clean circulating pipeline is communicated with the discharge pipeline, and the other end of the ultra-clean circulating pipeline is inserted into the smoke inlet pipeline and is communicated with the smoke inlet; the utility model discloses a circulation clean system has compensatied the defect that original pollution flue gas flow can't reach the flue gas demand of purifying tower, and the ultra-clean flue gas has diluted the pollution concentration of polluting the flue gas in flowing into the tobacco pipe way again through circulation clean system, and the ultra-clean flue gas is handled through twice purifying tower SOx/NOx control technology, further reduces the pollutant concentration in the emission flue gas, reaches better environmental protection treatment effect.
Description
Technical Field
The utility model relates to a SOx/NOx control flue gas circulation system.
Background
In the steel industry, the purification tower is adopted to carry out desulfurization and denitrification treatment on pollutants in polluted flue gas at present, but the temperature of the polluted flue gas is about 160 ℃ generally, and the polluted flue gas can be desulfurized and denitrated only by spraying water to reduce the temperature to about 120 ℃ generally in the purification tower, but in order to prevent the flue gas from generating local high temperature, the flue gas inlet demand in the purification tower is far higher than the flue gas volume of normal production, so that the air velocity at each position in a flue gas inlet pipeline is too high, the heat is difficult to maintain, the coke oven gas consumption is large, and the pellet roasting process is disordered.
SUMMERY OF THE UTILITY MODEL
The to-be-solved technical problem of the utility model is not enough to above-mentioned prior art, and provide a SOx/NOx control flue gas circulation system, this SOx/NOx control flue gas circulation system is no matter how the production situation changes on the one hand, the flue gas flow of advancing the mouth all is controllable, it is even to guarantee to advance the heat of each position of tobacco pipe way, on the other hand ultra-clean flue gas flows into the tobacco pipe way again through circulation clean system, the ultra-clean flue gas has diluted the pollution concentration who pollutes the flue gas, and the ultra-clean flue gas is handled through twice scrubbing tower SOx/NOx control technology, further reduce the pollutant concentration in the emission flue gas, reach better environmental protection treatment effect.
In order to solve the technical problem, the utility model discloses a technical scheme is:
a desulfurization and denitrification flue gas circulation system comprises a main flue purification system and a circulation purification system; the main flue purification system comprises a smoke inlet, a fan, an inlet valve, a purification tower, a discharge chimney, a smoke inlet pipeline and a discharge pipeline; one end of the smoke inlet is connected with the coke oven, the other end of the smoke inlet is communicated with the inlet of the purification tower through a smoke inlet pipeline, the fan is arranged on the smoke inlet pipeline, an inlet valve is arranged on the smoke inlet pipeline between the fan and the smoke inlet, the outlet of the purification tower is communicated at one end of the discharge pipeline, and the other end of the discharge pipeline is communicated with the discharge chimney; the circulating purification system comprises an ultra-clean circulating pipeline, a fan, a circulating valve and a flowmeter; the ultra-clean circulating pipeline is arranged as a branch of the discharge pipeline, one end of the ultra-clean circulating pipeline is communicated with the discharge pipeline, the other end of the ultra-clean circulating pipeline is inserted into the smoke inlet pipeline and is communicated with the smoke inlet, the ultra-clean circulating pipeline is provided with a fan, a circulating valve is arranged between the fan and the ultra-clean circulating pipeline, and the other end of the ultra-clean circulating pipeline is communicated with the discharge pipeline;
further, a flow meter A is arranged on the inlet valve and used for monitoring the flue gas flow passing through the inlet valve.
Further, a flow meter B is further arranged on the circulating valve and used for monitoring the flue gas flow passing through the circulating valve.
The utility model discloses following beneficial effect has:
1. the ultra-clean exhaust gas is subjected to secondary treatment, so that pollutants are lower, and the concentration of pollutants discharged from the main chimney can be diluted;
2. no additional gas input is needed, and the cost is low;
3. the temperature of the inlet flue gas is about 160 ℃, the temperature needs to be reduced to about 120 ℃ by spraying water, and the temperature of the discharged flue gas is about 70 ℃. The introduced exhaust flue gas can also reduce the temperature of inlet flue gas, reduce the water spray amount in the cooling process and reduce the corrosion degree of equipment.
Drawings
FIG. 1 is the structural schematic diagram of the flue gas circulation system for desulfurization and denitrification.
Among them are: 1. a coke oven; 2. a smoke inlet; 3. a smoke inlet pipeline; 31. an inlet valve; 32. a fan A; 33. a flowmeter A; 4. a purification tower; 5. a discharge conduit; 6. a circulation pipe; 61. a circulation valve; 62. a fan B; 63. a flow meter B; 7. and (5) discharging the chimney.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and specific preferred embodiments.
In the description of the present invention, it should be understood that the terms "left side", "right side", "upper part", "lower part" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, which is only for convenience of description and simplification of description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, "first", "second" and the like do not indicate the degree of importance of the component parts, and thus, are not to be construed as limiting the present invention. The specific dimensions used in the present embodiment are only for illustrating the technical solution, and do not limit the protection scope of the present invention.
As shown in fig. 1, a flue gas circulation system for desulfurization and denitrification includes a main flue purification system and a circulation purification system, wherein the main flue purification system includes a flue gas inlet 2, a fan a32, an inlet valve 31, a purification tower 4, an exhaust chimney 7, a flue gas inlet pipe 3, and an exhaust pipe 5; the smoke inlet 2 is arranged above the coke oven 1, one end of the smoke inlet pipeline 3 is communicated with the smoke inlet 2, the other end of the smoke inlet pipeline 3 is communicated with the inlet of the purification tower 4, the smoke inlet pipeline 3 is also provided with an inlet valve 31 and a fan A32, the inlet valve 31 is arranged at one end close to the smoke inlet 2, and the fan A32 is arranged at the other end close to the purification tower 4; and one end of the discharge pipeline 5 is communicated with the outlet of the purification tower 4, and the other end of the discharge pipeline 5 is communicated with a discharge chimney 7.
In order to monitor the flue gas flow of the inlet valve 31 in a timely manner, a flow meter a33 is arranged on the inlet valve 31.
The circulating purification system comprises an ultra-clean circulating pipeline 6, a fan B62 and a circulating valve 61; wherein the ultra-clean circulating pipeline 6 is arranged as a branch of the discharge pipeline 5, one end of the ultra-clean circulating pipeline 6 is communicated with the discharge pipeline 5, the other end of the ultra-clean circulating pipeline 6 is inserted into the smoke inlet pipeline 3 and is communicated with the smoke inlet 2, and the joint of the ultra-clean circulating pipeline 6 and the smoke inlet pipeline 3 is positioned between the inlet valve 31 and the fan A32 on the smoke inlet pipeline 3; the ultra-clean circulating pipeline 6 is provided with a circulating valve 61 and a fan B62, the circulating valve 61 is arranged at one end close to the smoke exhaust pipeline, and the fan B62 is arranged at the other end close to the smoke inlet pipeline 3.
In order to monitor the flue gas flow in the ultra-clean circulation duct 6 in a timely manner, a flow meter B63 is arranged on the circulation valve 61.
When the smoke generated by the coke oven 1 reaches the smoke inlet demand of the purification tower 4, the circulating valve 61 is closed, the ultra-clean circulating system is closed at the moment, the inlet valve 31 and the fan A32 on the smoke inlet pipeline 3 are opened, the polluted smoke enters the purification tower 4 after entering the smoke inlet pipeline 3 from the smoke inlet 2, the desulfurization, denitrification and purification work is carried out in the purification tower 4, the polluted smoke becomes ultra-clean gas after being purified qualified, the ultra-clean gas enters the discharge chimney 7 through the discharge pipeline 5, and finally the ultra-clean gas is discharged to enter the atmosphere.
When the polluted flue gas generated by the coke oven 1 does not reach the smoke inlet demand of the purification tower 4, the circulating valve 61 and the fan B62 are opened, the ultra-clean circulating system is opened, the main flue purification system and the circulating purification system are started to work at the same time, the polluted flue gas is purified into ultra-clean gas through the main flue purification system, the ultra-clean gas is in the discharge pipeline 5, one part of the ultra-clean gas passes through the ultra-clean circulating pipeline 6, and the other part of the polluted flue gas is directly discharged into the atmosphere through the discharge chimney 7; the ultra-clean gas that gets into among the ultra-clean circulating line 6 gets into tobacco pipe 3 through ultra-clean circulating line 6, ultra-clean gas and contaminated flue gas mix this moment, when the ultra-clean gas dilutes the concentration of pollution of contaminated flue gas, reduce the flue gas temperature who advances tobacco pipe 3, can also increase the flue gas flow who advances tobacco pipe 3, the flue gas flow who makes into tobacco pipe 3 reaches the cigarette demand of advancing of purifying tower 4, reduce the amount of water spray at the cooling in-process of purifying tower 4, alleviate the degree of corrosion of purifying tower 4 equipment.
The above detailed description describes the preferred embodiments of the present invention, but the present invention is not limited to the details of the above embodiments, and the technical idea of the present invention can be within the scope of the present invention to perform various equivalent transformations, which all belong to the protection scope of the present invention.
Claims (3)
1. The utility model provides a SOx/NOx control flue gas circulation system which characterized in that: comprises a main flue purification system and a circulating purification system;
the main flue purification system comprises a smoke inlet, a fan, an inlet valve, a purification tower, a discharge chimney, a smoke inlet pipeline and a discharge pipeline;
one end of the smoke inlet is connected with the coke oven, the other end of the smoke inlet is communicated with the inlet of the purification tower through a smoke inlet pipeline, the fan is arranged on the smoke inlet pipeline, an inlet valve is arranged on the smoke inlet pipeline between the fan and the smoke inlet, the outlet of the purification tower is communicated at one end of the discharge pipeline, and the other end of the discharge pipeline is communicated with the discharge chimney;
the circulating purification system comprises an ultra-clean circulating pipeline, a fan, a circulating valve and a flowmeter;
the ultra-clean circulating pipeline is arranged as a branch of the discharge pipeline, one end of the ultra-clean circulating pipeline is communicated with the discharge pipeline,
the other end of the ultra-clean circulating pipeline is inserted into the smoke inlet pipeline and is communicated with the smoke inlet, the fan is arranged on the ultra-clean circulating pipeline, a circulating valve is arranged between the fan and the ultra-clean circulating pipeline, and the other end of the ultra-clean circulating pipeline is communicated with the discharge pipeline.
2. The desulfurization and denitrification flue gas circulation system according to claim 1, characterized in that: and the inlet valve is also provided with a flow meter A, and the flow meter A is used for monitoring the flue gas flow passing through the inlet valve.
3. The desulfurization and denitrification flue gas circulation system according to claim 1, characterized in that: and a flow meter B is also arranged on the circulating valve and is used for monitoring the flue gas flow passing through the circulating valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020959751.7U CN213120123U (en) | 2020-05-29 | 2020-05-29 | Desulfurization and denitrification flue gas circulation system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020959751.7U CN213120123U (en) | 2020-05-29 | 2020-05-29 | Desulfurization and denitrification flue gas circulation system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213120123U true CN213120123U (en) | 2021-05-04 |
Family
ID=75669525
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020959751.7U Active CN213120123U (en) | 2020-05-29 | 2020-05-29 | Desulfurization and denitrification flue gas circulation system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN213120123U (en) |
-
2020
- 2020-05-29 CN CN202020959751.7U patent/CN213120123U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN109364742A (en) | A kind of collaboration of sintering flue gas SCR denitration takes off white device and technique | |
| CN108939808B (en) | Activated carbon treatment system for improving waste heat utilization rate and denitration rate and use method thereof | |
| CN104888591A (en) | Boiler flue gas denitration purification system and boiler flue gas denitration purification method | |
| CN104174287B (en) | Partial flue gas denitration system and method for sintering machine | |
| CN103480272A (en) | Dust-removing, denitration and desulfurization process and device for flue gas of glass kiln | |
| CN108380041A (en) | A kind of coke oven flue gas system for desulfuration and denitration and method based on activated carbon/coke | |
| CN210814723U (en) | High-temperature dust removal, desulfurization and denitrification device for cement kiln | |
| CN105664717A (en) | Desulphurization, denitration and dust removal integrated treatment process of exhaust gas | |
| CN101907406A (en) | Flue gas utilization and treatment system for industrial stoves | |
| CN203494378U (en) | SCR (Selective Catalytic Reduction) denitration device for controlling NOx of rotary cement kiln | |
| CN108392956A (en) | Desulfurization and denitrification system and method for coke oven flue gas | |
| CN205412681U (en) | Tail gas desulfurization , denitration, dust removal integration treatment device | |
| CN107551778B (en) | Flue gas denitration desulfurization dust removal process method | |
| CN111121472A (en) | Sintering machine flue gas internal and external combined cycle purification and waste heat utilization system | |
| CN207708812U (en) | A kind of coke oven flue gas denitration, desulfurization integrated processing unit | |
| CN213120123U (en) | Desulfurization and denitrification flue gas circulation system | |
| CN209564842U (en) | A kind of collaboration of sintering flue gas SCR denitration takes off white device | |
| CN205867863U (en) | Flue gas purification treatment device | |
| CN107930396A (en) | A kind of method for sintering fume centralized high-efficiency desulfurization denitration | |
| CN201764834U (en) | Utilization and treatment device for industrial kiln fume | |
| CN205164470U (en) | Exhaust purifying device | |
| CN107166376A (en) | Fluidized-bed combustion boiler denitrification apparatus and method of denitration based on cyclone separator | |
| CN208893900U (en) | A kind of active carbon processing system improving utilization rate of waste heat and denitrification rate | |
| EP3036480B1 (en) | Arrangement and method for flue gas stream bypass during selective catalytic reduction | |
| CN217015752U (en) | Integrated treatment system for desulfurization, denitration and dust removal of calcined flue gas |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |