CN210237178U - Wastewater zero discharge device for performing multistage evaporation concentration evaporation by using boiler hot flue gas - Google Patents
Wastewater zero discharge device for performing multistage evaporation concentration evaporation by using boiler hot flue gas Download PDFInfo
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- CN210237178U CN210237178U CN201920680827.XU CN201920680827U CN210237178U CN 210237178 U CN210237178 U CN 210237178U CN 201920680827 U CN201920680827 U CN 201920680827U CN 210237178 U CN210237178 U CN 210237178U
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Abstract
The utility model provides an utilize boiler hot flue gas to carry out waste water zero release device of multistage evaporation concentration evaporation to dryness, 90 ~ 160 ℃ low temperature flue gas is drawn forth from dust collector back flue during evaporation concentration, get into multistage evaporation concentration unit after the pressurization of bypass air blower, waste water sprays the spraying to evaporation concentrator upper portion through the pressurization of waste water circulating pump, and concentrated waste water causes the spraying on drying tower upper portion through the pressurization of second grade dense water booster pump, and the drying tower is linked together with dust collector, and the flue draws forth partly 300 ~ 360 ℃ high temperature flue gas from air heater before simultaneously and carries out evaporation drying, the utility model has the advantages of the energy consumption is low, the investment is low, the running cost is low, can popularize and apply waste water zero release field.
Description
Technical Field
The utility model belongs to the technical field of industrial waste water treatment device or equipment, concretely relates to utilize boiler hot flue gas to carry out the waste water zero discharge device of multistage evaporation concentration evaporation to dryness.
Background
At present, the so-called zero discharge is only near zero discharge of waste water, and real zero discharge is difficult to realize. After the wastewater reaches the standard by chemical precipitation methods such as lime softening or sodium carbonate treatment, the wastewater still contains high-concentration soluble solids and is difficult to recycle.
If the salt-containing wastewater is directly sprayed to a coal yard, secondary pollution is easy to form and the equipment can be corroded; the membrane separation technology, such as reverse osmosis, forward osmosis, nanofiltration and the like, has the defects of high investment, high energy consumption, high operation cost, easy blockage and pollution of the membrane and the like, and the final strong brine also needs to be crystallized and the like.
The technology of directly evaporating the high-temperature flue gas is adopted, although the process is simple, the equipment operation is reliable, the investment is low, the energy consumption is high, and the boiler efficiency is reduced.
Disclosure of Invention
The utility model aims to solve the technical problem that overcome above-mentioned prior art not enough, provide a reasonable in design, simple process, operation are reliable, with low costs, the energy consumption is low, blast furnace is efficient utilize the boiler hot flue gas to carry out the waste water zero discharge apparatus of multistage evaporation concentration evaporation to dryness.
The technical scheme for solving the technical problems is as follows: the export of boiler is linked together and is linked together with the last entry of drying tower through pipeline and air heater's entry, air heater's export is linked together with electrostatic precipitator's entry, electrostatic precipitator's export is linked together with the entry of draught fan, an export of draught fan is linked together with the entry of desulfurizing tower, another export is linked together with bypass booster fan's entry, bypass booster fan's export is linked together with the entry of multistage evaporation concentration unit, an export of multistage evaporation concentration unit is linked together with the entry of desulfurizing tower, another export is linked together through the entry of installing one-level dense water booster pump on the pipeline and dense water tank, the export of desulfurizing tower is linked together with the entry of chimney, the export of dense water tank is linked together through the last entry of installing second grade dense water booster pump on the pipeline and drying tower.
The utility model discloses a multistage evaporation concentration unit comprises 2 grades of evaporation concentration units or 3 grades of evaporation concentration units.
The utility model discloses an evaporation concentration unit does: the outlet of the evaporation concentrator is communicated with the inlet of the waste water tank, one path of the outlet of the waste water tank is communicated with the inlet of the evaporation concentrator through a waste water circulating pump, and the other path of the outlet of the waste water tank is communicated with the next-stage waste water tank.
The utility model discloses an evaporative concentrator does: the middle part in the concentrator tank body is provided with a filler, the upper part in the concentrator tank body is provided with a sprayer, an inlet of the sprayer is communicated with a wastewater tank through a wastewater circulating pump arranged on a pipeline, and the lower part of the concentrator tank body is communicated with the wastewater tank.
The utility model discloses a drying tower does: the sprayer is arranged on the upper portion in the drying tower body, the high-temperature flue gas cyclone device is arranged below the sprayer on the upper portion in the drying tower body, the high-temperature flue gas straight air channel is arranged on the side wall of the drying tower body, and the compressed air device is arranged on the lower portion of the drying tower body.
The utility model discloses a high temperature flue gas whirl device does: the rotating angle adjustable hot air guide plates are uniformly distributed in the lower conical convergent cyclone device body.
The utility model discloses a dense water tank does: the top of the concentrated water tank is provided with a stirring device, the stirring device is provided with stirring blades on a stirring shaft arranged at the top of the concentrated water tank, and the stirring shaft is connected with an output shaft of a motor.
Compared with the prior art, the utility model has the following advantages:
the utility model discloses a power plant's boiler flue gas waste heat adds the thermal evaporation and utilizes the concentrated evaporation to dryness waste water of high temperature flue gas to industrial waste water, in the concentration tower, waste water is by the flue gas heating evaporation step by step, it is concentrated step by step, the flue gas is by abundant washing, dense water smoke fully contacts the heat transfer with the flue gas in the drying tower, whole evaporation to dryness, the ash content returns the main flue along with the flue gas and gets rid of through electrostatic precipitator, the solid ash content of isolating blows off regularly through the compressed air device of drying tower lower part, return the main flue along with the flue gas and get rid of through electrostatic precipitator, the high enriched industrial waste water treatment of power plant has been solved, environmental pollution has been. The utility model has the advantages of reasonable in design, low energy consumption, economic benefits are showing, can use widely at thermal power plant.
Drawings
Fig. 1 is a schematic structural diagram of an embodiment of the present invention.
Fig. 2 is a schematic structural view of the multistage evaporation and concentration unit 8 of fig. 1 in 2 stages.
Fig. 3 is a schematic structural view of the multistage evaporation and concentration unit 8 of fig. 1 in 3 stages.
Fig. 4 is a schematic diagram of the structure of the concentrate tank 10 of fig. 1.
Fig. 5 is a schematic view of the structure of the drying tower 12 in fig. 1.
In the figure 1, a boiler; 2. an air preheater; 3. an electric dust collector; 4. an induced draft fan; 5. a bypass booster fan; 6. a desulfurizing tower; 7. a chimney; 8. a multi-stage evaporation concentration unit; 9. a first-stage concentrated water booster pump; 10. a concentrated water tank; 11. a second-stage concentrated water booster pump; 12. a drying tower; 8-1, a first-stage evaporation concentrator; 8-2, a first-stage wastewater circulating pump; 8-3, a primary wastewater tank; 8-4, a secondary wastewater tank; 8-5, a secondary wastewater circulating pump; 8-6, a secondary evaporation concentrator; 8-7, a third-level wastewater tank; 8-8, a three-stage wastewater circulating pump; 8-9, a three-stage evaporation concentrator; 10-1, a concentrated water tank; 10-2, a stirring device; 12-1, a compressed air device, 12-2 and a drying tower body; 12-3, a high-temperature flue gas straight air channel; 12-4, a high-temperature flue gas cyclone device; 12-5 and a sprayer.
Detailed Description
The present invention will be described in further detail with reference to the following drawings and examples, but the present invention is not limited to these examples.
Example 1
In fig. 1, 4, 5, the utility model discloses utilize boiler hot flue gas to carry out the waste water zero discharge device of multistage evaporation concentration evaporation to dryness, the export of boiler 1 is linked together and is linked together with the last entry of drying tower 12 through the entry of pipeline with air heater 2, the export of air heater 2 is linked together with the entry of electrostatic precipitator 3, the export of electrostatic precipitator 3 is linked together with the entry of draught fan 4, an export of draught fan 4 is linked together with the entry of desulfurizing tower 6, another export is linked together with the entry of bypass booster fan 5, the export of bypass booster fan 5 is linked together with the entry of multistage evaporation concentration unit 8, the evaporation concentration unit of this embodiment is linked together by evaporation concentrator, the waste water circulating pump, the waste water tank is connected and is constituted, an entry and the export of bypass booster fan 5 of final stage evaporation concentrator 8-1, an export and the entry of one-level waste water tank 8-3 of one-level evaporation concentrator, The other outlet is communicated with the inlet of the desulfurizing tower 6, one path of the outlet of the first-stage waste water tank 8-3 is communicated with the inlet of the first-stage evaporation concentrator 8-1 through a first-stage waste water circulating pump 8-2, the other path is communicated with the inlet of the second-stage waste water tank 8-4, … …, one outlet of the last-stage waste water tank is communicated with the other inlet of the last-stage evaporation concentrator through a last-stage waste water circulating pump arranged on a pipeline, the other outlet of the last-stage waste water tank is communicated with the inlet of a concentrated water tank 10 through a first-stage concentrated water booster pump 11 arranged on the pipeline, the evaporation concentrator of the embodiment comprises a, the concentrator is formed by connecting sprayers, the middle part in the concentrator tank body is provided with a filler, the upper part in the concentrator tank body is provided with a sprayer, the inlet of the sprayer is communicated with a wastewater tank through a wastewater circulating pump arranged on a pipeline, and the lower part of the concentrator tank body is communicated with the wastewater tank. The waste water is pressurized to the middle upper part of a first-stage evaporation concentrator 8-1 by a first-stage waste water circulating pump 8-2 for spraying and atomizing, the shower sprays the waste water into a filler for evaporation concentration exchange, the smoke flowing through the surface of the filler is rapidly cooled and radiated, the smoke reaches moisture saturation, the smoke temperature is reduced to 50-60 ℃, the cooled smoke returns to a desulfurizing tower 6 through a bypass flue, the unevaporated waste water partially flows into a first-stage waste water tank 8-3 for continuous circulation evaporation concentration, the unevaporated partially concentrated waste water is pressurized to a second-stage waste water tank 8-4 through the first-stage waste water circulating pump 8-2, the waste water is pressurized to the middle upper part of the second-stage evaporation concentrator 8-6 for spraying and atomizing by a second-stage waste water circulating pump 8-5, the shower sprays the waste water into the filler for evaporation concentration exchange, the smoke flowing through the surface of the filler is rapidly cooled and radiated, the cooled, concentrated waste water which is not evaporated flows into a secondary waste water tank 8-4, continuous circulating evaporation concentration is carried out, partial concentrated waste water which is not evaporated is pressurized to a tertiary waste water tank 8-7 through a secondary waste water circulating pump 8-5, the waste water is pressurized to the middle upper part of a tertiary evaporation concentrator 8-9 through a tertiary waste water circulating pump 8-8, spraying and spraying are carried out, the waste water is sprayed into a filler by a sprayer for evaporation concentration exchange, smoke flowing through the surface of the filler is rapidly cooled and dissipated heat, the cooled smoke enters the secondary evaporation concentrator 8-6, the concentrated waste water which is not evaporated flows into the tertiary waste water tank 8-9, continuous circulating evaporation concentration is carried out, and the like.
The concentrated water tank 10 of the embodiment is formed by connecting a concentrated water tank 10-1 and a stirring device 10-2, the stirring device 10-2 is installed at the top of the concentrated water tank 10-1, and further, the stirring device 10-2 is a stirring shaft arranged at the top of the concentrated water tank 10-1 and provided with stirring blades, and the stirring shaft is connected with an output shaft of a motor. The outlet of the desulfurizing tower 6 is communicated with the inlet of the chimney 7, the outlet of the stirring and concentrating device 10 is communicated with the lower inlet of the drying tower 12 through a second-stage concentrated water booster pump 11 arranged on a pipeline, the wastewater which is uniformly stirred in the concentrated water tank 10-1 is pressurized to the upper part of the drying tower 12 through the second-stage concentrated water booster pump 11 and is sprayed and evaporated to dryness, the wastewater water mist and the rotational smoke in the drying tower 12 are fully contacted for heat exchange, and the ash is completely evaporated to dryness and returns to the main flue along with the smoke to be removed through the electric dust collector 3.
The drying tower of the embodiment is formed by connecting a compressed air device 12-1, a drying tower body 12-2, a high-temperature flue gas straight air channel 12-3, a high-temperature flue gas cyclone device 12-4 and a sprayer 12-5, wherein the sprayer 12-4 is arranged at the upper part in the drying tower body 12-2, the high-temperature flue gas cyclone device 12-4 is arranged below the sprayer at the upper part in the drying tower body 12-2, furthermore, the high-temperature flue gas cyclone device 12-4 is a cyclone device body with conical convergence at the lower part, hot air guide plates with adjustable rotating angles are uniformly arranged in the cyclone device body, the high-temperature flue gas straight air channel 12-3 is arranged on the side wall of the drying tower body 12-2, the high-temperature flue gas is divided into two parts, one part of the high-temperature flue, the high-temperature flue gas cyclone device 12-4 forms cyclone wind in the drying tower 12, the other part of high-temperature flue gas forms wall-following flue gas in the drying tower 12 through the high-temperature flue gas straight air duct 12-3, water mist sprayed out of the sprayer 12-5 contacts with the high-temperature cyclone flue gas to instantly evaporate waste water, the compressed air device 12-1 is installed at the lower part of the drying tower body 12-2, solid ash separated from the lower part of the drying tower body 12-2 is periodically blown out through the compressed air device 12-1 at the lower part of the drying tower 12-2, and returns to the main flue along with the flue gas to be removed.
Example 2
In fig. 2, in the above embodiment 1, the multistage evaporation concentration unit of this embodiment is composed of 2-stage evaporation concentration units, one inlet of the second-stage evaporation concentrator 8-6 is communicated with the outlet of the bypass booster fan 5, one outlet of the first-stage evaporation concentrator 8-1 is communicated with the inlet of the first-stage waste water tank 8-3, the other outlet is communicated with the inlet of the desulfurizing tower 6, one path of the outlet of the first-stage waste water tank 8-3 is communicated with the inlet of the first-stage evaporation concentrator 8-1 through the first-stage waste water circulating pump 8-2, the other path is communicated with the inlet of the second-stage waste water tank 8-4, one outlet of the second-stage waste water tank 8-4 is communicated with the other inlet of the second-stage evaporation concentrator 8-6 through the second-stage waste water circulating pump 8-5 installed on the pipeline, and the other outlet of the second-stage waste water tank 8-4 is communicated with The connection, the other parts and the connection relationship of the parts are completely the same as those in embodiment 1.
Example 3
In fig. 3, in the above embodiment 1, the multistage evaporation and concentration unit of this embodiment is composed of 3 stages of evaporation and concentration units, one inlet of the third stage evaporation and concentration unit 8-9 is communicated with the outlet of the bypass booster fan 5, one outlet of the first stage evaporation and concentration unit 8-1 is communicated with the inlet of the first stage waste water tank 8-3, the other outlet is communicated with the inlet of the desulfurizing tower 6, one path of the outlet of the first stage waste water tank 8-3 is communicated with the inlet of the first stage evaporation and concentration unit 8-1 through the first stage waste water circulating pump 8-2, the other path is communicated with the inlet of the second stage waste water tank 8-4, one outlet of the third stage waste water tank 8-7 is communicated with the other inlet of the third stage evaporation and concentration unit 8-9 through the third stage waste water circulating pump 8-8 installed on the pipeline, and the other outlet of the third stage waste water tank 8-7 is communicated with the The other components and the connection relationship between the components are exactly the same as in embodiment 1.
Claims (7)
1. The utility model provides an utilize boiler hot flue gas to carry out waste water zero discharge apparatus of multistage evaporation concentration evaporation to dryness which characterized in that: the export of boiler is linked together and is linked together with the last entry of drying tower through pipeline and air heater's entry, air heater's export is linked together with electrostatic precipitator's entry, electrostatic precipitator's export is linked together with the entry of draught fan, an export of draught fan is linked together with the entry of desulfurizing tower, another export is linked together with bypass booster fan's entry, bypass booster fan's export is linked together with the entry of multistage evaporation concentration unit, an export of multistage evaporation concentration unit is linked together with the entry of desulfurizing tower, another export is linked together through the entry of installing one-level dense water booster pump on the pipeline and dense water tank, the export of desulfurizing tower is linked together with the entry of chimney, the export of dense water tank is linked together through the last entry of installing second grade dense water booster pump on the pipeline and drying tower.
2. The wastewater zero discharge device for multi-stage evaporation concentration and evaporation by using boiler hot flue gas as claimed in claim 1, is characterized in that: the multi-stage evaporation concentration unit consists of a 2-stage evaporation concentration unit or a 3-stage evaporation concentration unit.
3. The wastewater zero discharge device for multi-stage evaporation concentration and evaporation by using boiler hot flue gas as claimed in claim 2, wherein the evaporation concentration unit is: the outlet of the evaporation concentrator is communicated with the inlet of the waste water tank, one path of the outlet of the waste water tank is communicated with the inlet of the evaporation concentrator through a waste water circulating pump, and the other path of the outlet of the waste water tank is communicated with the next-stage waste water tank.
4. The wastewater zero discharge device for multi-stage evaporation concentration and evaporation by using boiler hot flue gas as claimed in claim 3, wherein the evaporation concentrator is: the middle part in the concentrator tank body is provided with a filler, the upper part in the concentrator tank body is provided with a sprayer, an inlet of the sprayer is communicated with a wastewater tank through a wastewater circulating pump arranged on a pipeline, and the lower part of the concentrator tank body is communicated with the wastewater tank.
5. The wastewater zero discharge device for multi-stage evaporation concentration and evaporation by using boiler hot flue gas as claimed in claim 1, wherein the drying tower is: the sprayer is arranged on the upper portion in the drying tower body, the high-temperature flue gas cyclone device is arranged below the sprayer on the upper portion in the drying tower body, the high-temperature flue gas straight air channel is arranged on the side wall of the drying tower body, and the compressed air device is arranged on the lower portion of the drying tower body.
6. The wastewater zero discharge device for performing multi-stage evaporation concentration and evaporation by using boiler hot flue gas as claimed in claim 5, wherein the high temperature flue gas cyclone device is: the rotating angle adjustable hot air guide plates are uniformly distributed in the lower conical convergent cyclone device body.
7. The wastewater zero discharge device for multi-stage evaporation concentration and evaporation by distillation by using boiler hot flue gas as claimed in claim 1, wherein the concentrated water tank is: the top of the concentrated water tank is provided with a stirring device, the stirring device is provided with stirring blades on a stirring shaft arranged at the top of the concentrated water tank, and the stirring shaft is connected with an output shaft of a motor.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920680827.XU CN210237178U (en) | 2019-05-13 | 2019-05-13 | Wastewater zero discharge device for performing multistage evaporation concentration evaporation by using boiler hot flue gas |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201920680827.XU CN210237178U (en) | 2019-05-13 | 2019-05-13 | Wastewater zero discharge device for performing multistage evaporation concentration evaporation by using boiler hot flue gas |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111908536A (en) * | 2020-09-07 | 2020-11-10 | 国电科学技术研究院有限公司 | Desulfurization wastewater concentrated solution pulsating spray drying method and drying device |
| CN113104916A (en) * | 2021-03-23 | 2021-07-13 | 中国能源建设集团广东省电力设计研究院有限公司 | Evaporation treatment system for salt-containing sewage |
-
2019
- 2019-05-13 CN CN201920680827.XU patent/CN210237178U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111908536A (en) * | 2020-09-07 | 2020-11-10 | 国电科学技术研究院有限公司 | Desulfurization wastewater concentrated solution pulsating spray drying method and drying device |
| CN111908536B (en) * | 2020-09-07 | 2024-02-20 | 国家能源集团科学技术研究院有限公司 | Desulfurization wastewater concentrated solution pulsation spray drying method and drying device |
| CN113104916A (en) * | 2021-03-23 | 2021-07-13 | 中国能源建设集团广东省电力设计研究院有限公司 | Evaporation treatment system for salt-containing sewage |
| CN113104916B (en) * | 2021-03-23 | 2022-08-30 | 中国能源建设集团广东省电力设计研究院有限公司 | Evaporation treatment system for salt-containing sewage |
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