CN209802114U - Coupling device applied to metallurgical sintering flue gas whitening elimination and wastewater zero discharge - Google Patents
Coupling device applied to metallurgical sintering flue gas whitening elimination and wastewater zero discharge Download PDFInfo
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- CN209802114U CN209802114U CN201920523995.8U CN201920523995U CN209802114U CN 209802114 U CN209802114 U CN 209802114U CN 201920523995 U CN201920523995 U CN 201920523995U CN 209802114 U CN209802114 U CN 209802114U
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- heater
- flue gas
- gas
- waste water
- gas cooler
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/25—Process efficiency
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- Chimneys And Flues (AREA)
- Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)
Abstract
The utility model relates to a be applied to metallurgical sintering flue gas and disappear white and coupling device of waste water zero release, include the one-level gas cooler that from left to right communicates in proper order, the dust remover, draught fan and second grade gas cooler, second grade gas cooler is through desulfurizing tower intercommunication gas heater, one of them export intercommunication chimney of gas heater, another export and air heater of gas heater, waste water heater communicates second grade gas cooler together, second grade gas cooler communicates one-level gas cooler, one-level gas cooler's export respectively with gas heater, air heater, waste water heater intercommunication, waste water heater, air heater all communicates waste water zero release device through the pipeline. The utility model provides a white and waste water zero release coupling device of flue gas disappears can not only realize the white of disappearing of flue gas, effectively uses the waste heat of flue gas in the processing procedure of the waste water zero release of whole factory simultaneously, and the energy utilizes in grades, and the heat utilization efficiency is high.
Description
Technical Field
The utility model relates to a white technical field of flue gas disappears especially relates to a be applied to metallurgical sintering flue gas and disappear white and waste water zero release's coupling device.
Background
Wet desulphurization is widely applied to sintering flue gas desulphurization devices in the metallurgical industry due to low investment and high efficiency, water vapor in flue gas at the outlet of a desulphurization tower is in a saturated state, if a certain method is not adopted for treatment, the temperature of the environment is lower than the temperature of the flue gas, and when the flue gas reaches the outlet of a chimney, the temperature of the flue and the chimney is reduced and even after the flue gas is discharged from the chimney, the mass transfer and the heat transfer with the environment air cause the temperature of the flue and the chimney to be lower than the saturated temperature, so the flue gas is generally called white smoke.
the smoke is whitened, namely the smoke keeps a certain temperature difference with the saturation temperature at the outlet of the chimney, and the smoke does not reach the saturation temperature after transferring the mass and the heat with the ambient air in a certain area of the outlet of the chimney, so that the white smoke cannot appear.
The common smoke whitening technology mainly comprises the following steps: flue gas condensation process, slurry cooling process, WGGH process and the like.
The flue gas condensation process is that the temperature of the flue gas at the outlet of the desulfurizing tower is 45-52 ℃, the temperature is reduced to 42-48 ℃ by the flue gas condenser, and then the temperature is increased to 55-60 ℃ by the flue gas heater. In the process of desulfurization, the flue gas entering the tower firstly evaporates the moisture in the desulfurization slurry, enters the flue gas leaving the tower, and then a part of the flue gas is condensed by a flue gas condenser, the process has internal circulation of heat transfer and mass transfer of evaporation-condensation, and the waste heat of the flue gas is not effectively utilized, and the consumption of circulating water is increased.
the slurry cooling process and the power plant whitening improvement project are also applied, the slurry-cooling water indirect cooling or the slurry flash evaporation is adopted, the temperature of the spraying slurry on the uppermost layer is reduced by 3-5 ℃, so that the temperature of the flue gas discharged from the tower is correspondingly reduced, and the flue gas is heated to 55-60 ℃ by a flue gas heater. Although the temperature of the flue gas discharged from the tower is reduced, the water vapor is still in a saturated state, and a flue gas heater is also required to heat the flue gas. Regardless of the slurry condenser, there is also a problem of operational reliability (clogging) which, in terms of unit thermal efficiency and operational cost, reduces efficiency and increases operational cost as with the condensing-reheating process.
In the conventional WGGH process, only the flue gas waste heat in front of a dust remover is transmitted to the flue gas at the outlet of a desulfurizing tower through a heating medium, so that the temperature of the flue gas is raised to 55-60 ℃. Although the aim of eliminating the white smoke is achieved, most of the smoke waste heat is not fully utilized.
SUMMERY OF THE UTILITY MODEL
In order to overcome prior art's the aforesaid not enough, the utility model provides a be applied to metallurgical sintering flue gas and disappear white and waste water zero release's coupling device, the device can realize disappearing of flue gas white, is applied to waste water zero release processing procedure with the flue gas waste heat simultaneously, and sintering flue gas waste heat recovery rate is high.
The invention is realized by the following technical scheme:
The utility model provides a be applied to metallurgical sintering flue gas and disappear white and coupling device of waste water zero release, includes one-level gas cooler, dust remover, draught fan and the second grade gas cooler that from left to right communicates in proper order, second grade gas cooler communicates the gas heater through the desulfurizing tower, one of them export intercommunication chimney of gas heater, another export of gas heater communicates the second grade gas cooler with air heater, waste water heater together, second grade gas cooler communicates one-level gas cooler, the export of one-level gas cooler communicates with gas heater, air heater, waste water heater respectively, waste water heater, air heater all communicate waste water zero release device through the pipeline.
Furthermore, the wastewater zero discharge device adopts a multi-stage distillation system or a multi-stage flash system to be connected in series with a wastewater spray concentration system, the wastewater heater is communicated with the wastewater spray concentration system through the multi-stage distillation system or the multi-stage flash system, and the air heater is communicated with the wastewater spray concentration system.
further, the bottom of the desulfurization tower is communicated with a slurry circulating pump through a pipeline, and an outlet of the slurry circulating pump is communicated with a demister on the upper portion of the desulfurization tower through a pipeline.
Further, the air heater and the waste water heater are both tube-shell type or plate type heat exchangers.
Compared with the prior art, the beneficial effects of the utility model reside in that:
The utility model discloses a be applied to metallurgical sintering flue gas and disappear white and waste water zero release's coupling device adopts two-stage flue gas cooler and flue gas heater, has not only reduced desulfurizing tower export flue gas temperature, has saved the system and has supplemented the water yield, and sintering flue gas waste heat recovery rate reaches more than 65%, when realizing that the flue gas disappears white, with the waste heat of flue gas effectively be applied to the processing procedure of the waste water zero release of whole factory, the energy utilizes in grades, the heat utilization efficiency is high; compared with the traditional zero discharge system for transferring the waste heat to the waste water through the flue gas, the waste water zero discharge system has the advantages of investment saving, easiness in implementation and the like.
drawings
Fig. 1 is a schematic structural diagram of the coupling device applied to metallurgical sintering flue gas whitening and wastewater zero discharge of the present invention.
in the figure:
1. A primary flue gas cooler; 2. a dust remover; 3. an induced draft fan; 4. a secondary flue gas cooler; 5. a desulfurizing tower; 6. a slurry circulating pump; 7. a flue gas heater; 8. a chimney; 9. an air heater; 10. a waste water heater; 11. a multi-stage distillation system or a multi-stage flash system; 12. waste water spray concentration system.
Detailed Description
The following examples are presented to illustrate certain embodiments of the invention and should not be construed as limiting the scope of the invention. The present disclosure may be modified from materials, methods, and reaction conditions at the same time, and all such modifications are intended to be within the spirit and scope of the present disclosure.
As shown in fig. 1, a be applied to metallurgical sintering flue gas and disappear white and waste water zero release's coupling device, include one-level gas cooler 1, dust remover 2, draught fan 3 and second grade gas cooler 4 that communicate in proper order from left to right, second grade gas cooler 4 communicates gas heater 7 through desulfurizing tower 5, one of them export intercommunication chimney 8 of gas heater 7, another export of gas heater 7 communicates second grade gas cooler 4 with air heater 9, waste water heater 10 together, second grade gas cooler 4 communicates one-level gas cooler 1, the export of one-level gas cooler 1 communicates with gas heater 7, air heater 9, waste water heater 10 respectively, waste water heater 10, air heater 9 all communicate waste water zero release device through the pipeline.
In this embodiment, the wastewater zero discharge apparatus employs a multi-stage distillation system or a multi-stage flash evaporation system 11 to connect in series a wastewater spray concentration system 12, the wastewater heater 10 is communicated to the wastewater spray concentration system 12 through the multi-stage distillation system or the multi-stage flash evaporation system 11, and the air heater 9 is communicated with the wastewater spray concentration system 12, since the operating temperature of the system is less than 90 ℃, the equipment and the pipeline thereof can be made of PP or PTFE and other materials, the apparatus investment can be greatly saved.
In this embodiment, the bottom of the desulfurization tower 5 is connected to a slurry circulation pump 6 via a pipe, and the outlet of the slurry circulation pump 6 is connected to a demister at the upper part of the desulfurization tower 5 via a pipe.
In the present embodiment, the air heater 9 and the waste water heater 10 are both tube-shell type or plate type heat exchangers.
The specific working process will now be described in detail (A, sintering flue gas from denitration, B, chimney exhaust flue gas, C, air from a fan, D, whole plant wastewater from wastewater pretreatment, E, strong brine centrifugal separation, F, exhaust air):
Step 1: the sintering flue gas A (120-; the temperature of the flue gas discharged from the tower is raised to 55-60 ℃ by a flue gas heater 7, and a chimney 8 discharges flue gas B;
step 2: after heating the heat medium water (55 ℃) from an air heater 9 (for treating air C from a fan), a waste water heater 10 (for treating whole plant waste water D from waste water pretreatment) and a flue gas heater 7 to 100 ℃ sequentially through a secondary flue gas cooler 4 and a primary flue gas cooler 1, dividing the heat medium water into two parts, wherein one part is sent to the flue gas heater 7 to heat flue gas out of a desulfurizing tower 5, the other part is sent to the air heater 9 and the waste water heater 10 of a waste water zero-discharge system, and the temperature of the heat medium water is reduced to 55 ℃ after heat is recovered, and the process is repeated;
And step 3: the wastewater D from the whole factory from wastewater pretreatment is heated to 85 ℃ by a wastewater heater 10, then enters a multistage distillation system or a multistage flash system 11 for multistage distillation, the wastewater after being concentrated by the multistage distillation is sent to a wastewater spray concentration system 12, and strong brine after being further concentrated is subjected to centrifugal separation E or air discharge F.
In conclusion, the coupling device applied to metallurgical sintering flue gas whitening elimination and wastewater zero discharge adopts the two-stage flue gas cooler and the flue gas heater, when the flue gas whitening elimination is realized, the waste heat of the flue gas is effectively applied to the treatment process of the wastewater zero discharge of the whole plant, the energy is utilized in a grading way, and the heat utilization efficiency is high.
The above only is the embodiment of the present invention, not limiting the patent scope of the present invention, all the equivalent structures or equivalent processes that are used in the specification and the attached drawings or directly or indirectly applied to other related technical fields are included in the patent protection scope of the present invention.
Claims (4)
1. The utility model provides a be applied to metallurgical sintering flue gas and disappear white and waste water zero release's coupling device, a serial communication port, include one-level gas cooler (1), dust remover (2), draught fan (3) and second grade gas cooler (4) that communicate in proper order from left to right, second grade gas cooler (4) communicate gas heater (7) through desulfurizing tower (5), one of them export intercommunication chimney (8) of gas heater (7), another export and air heater (9) of gas heater (7), waste water heater (10) communicate second grade gas cooler (4) together, second grade gas cooler (4) communicate one-level gas cooler (1), the export of one-level gas cooler (1) communicates with gas heater (7), air heater (9), waste water heater (10) respectively, waste water heater (10) have, The air heaters (9) are communicated with a wastewater zero discharge device through pipelines.
2. The coupling device for the metallurgical sintering flue gas whitening elimination and the wastewater zero discharge is characterized in that the wastewater zero discharge device adopts a multi-stage distillation system or a multi-stage flash evaporation system (11) to be connected with a wastewater spray concentration system (12) in series, the wastewater heater (10) is communicated with the wastewater spray concentration system (12) through the multi-stage distillation system or the multi-stage flash evaporation system (11), and the air heater (9) is communicated with the wastewater spray concentration system (12).
3. The coupling device applied to metallurgical sintering flue gas whitening elimination and wastewater zero emission of claim 1, wherein the bottom of the desulfurization tower (5) is communicated with the slurry circulating pump (6) through a pipeline, and the outlet of the slurry circulating pump (6) is communicated with the demister at the upper part of the desulfurization tower (5) through a pipeline.
4. The coupling device applied to metallurgical sintering flue gas whitening elimination and wastewater zero discharge of claim 1, wherein the air heater (9) and the wastewater heater (10) are both tube-shell type or plate type heat exchangers.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920523995.8U CN209802114U (en) | 2019-04-17 | 2019-04-17 | Coupling device applied to metallurgical sintering flue gas whitening elimination and wastewater zero discharge |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920523995.8U CN209802114U (en) | 2019-04-17 | 2019-04-17 | Coupling device applied to metallurgical sintering flue gas whitening elimination and wastewater zero discharge |
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| Publication Number | Publication Date |
|---|---|
| CN209802114U true CN209802114U (en) | 2019-12-17 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201920523995.8U Active CN209802114U (en) | 2019-04-17 | 2019-04-17 | Coupling device applied to metallurgical sintering flue gas whitening elimination and wastewater zero discharge |
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|---|---|
| CN (1) | CN209802114U (en) |
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2019
- 2019-04-17 CN CN201920523995.8U patent/CN209802114U/en active Active
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