CN213802996U - Desulfurization waste water flue gas waste heat flat membrane evaporation concentration equipment - Google Patents
Desulfurization waste water flue gas waste heat flat membrane evaporation concentration equipment Download PDFInfo
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- CN213802996U CN213802996U CN202022694203.9U CN202022694203U CN213802996U CN 213802996 U CN213802996 U CN 213802996U CN 202022694203 U CN202022694203 U CN 202022694203U CN 213802996 U CN213802996 U CN 213802996U
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Abstract
The utility model relates to a flat membrane evaporation concentration device for waste heat of flue gas in desulfurization waste water, which comprises a shell and a plurality of flat membranes which are obliquely arranged and are arranged in the shell in a multilayer overlapping mode, wherein a space is reserved between two adjacent layers of flat membranes; the top of the shell is provided with a wastewater inlet, the bottom of the shell is provided with a wastewater outlet, wastewater enters the shell through the wastewater inlet, water is evaporated after water films are formed on the upper surfaces of the flat sheet membranes, and the rest desulfurization wastewater is discharged through the wastewater outlet; the front end of the shell is provided with a flue gas inlet, the rear end of the shell is provided with a flue gas outlet, flue gas entering the shell uniformly flows through the flue gas distributor from the upper part of each layer of flat membrane, and simultaneously carries water vapor in waste water to be discharged from the flue gas outlet at the lower end of the equipment to enter the desulfurizing tower. The utility model discloses can take away the steam that evaporates formation on the dull and stereotyped membrane through the flue gas to realize the concentration of waste water, equipment structure is simple, and whole operation process is simple and convenient, and the running cost is low.
Description
Technical Field
The utility model belongs to the technical field of desulfurization waste water is concentrated, concretely relates to dull and stereotyped membrane evaporation concentration equipment of desulfurization waste water flue gas waste heat.
Background
In the technical field of FGD wastewater treatment, a limestone-gypsum wet flue gas desulfurization process is mainly adopted, the process is stable in operation, convenient to maintain and high in desulfurization efficiency, and is the most widely applied desulfurization technology at present. In order to ensure the stable operation and the desulfurization efficiency of the desulfurization and desulfurization system, the concentration of chloride ions in the circulating desulfurization slurry is controlled to be 12000-20000mg/L, the concentration of the chloride ions in the desulfurization slurry continuously rises along with the continuous proceeding of the desulfurization reaction of the absorption tower, part of the desulfurization slurry in the absorption tower needs to be discharged and replaced, and the desulfurization system needs to discharge wastewater periodically. The waste water is acidic, contains a large amount of suspended substances, salt substances, calcium and magnesium ions, chlorides, heavy metals, COD, fluorides and the like, contains a large amount of components mainly depending on factors such as the sulfur content of fuel, a desulfurization process and the like, and is difficult to treat.
In various concentration and reduction processes developed in the field of zero discharge of desulfurization wastewater of power plants at present, the structure is complex, the process is complicated, and the operation cost is high.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a dull and stereotyped membrane evaporative concentration equipment of desulfurization waste water flue gas waste heat to it is loaded down with trivial details to solve concentrated technology, problem that the running cost is high.
The utility model discloses a dull and stereotyped membrane evaporative concentration equipment of desulfurization waste water flue gas waste heat is realized like this:
the flat membrane evaporation concentration equipment for the waste heat of the flue gas of the desulfurization wastewater comprises a shell and a plurality of flat membranes which are obliquely arranged and are arranged in the shell in a multi-layer overlapping mode, wherein a gap is reserved between every two adjacent flat membranes;
the top of the shell is provided with a wastewater inlet, the bottom of the shell is provided with a wastewater outlet, wastewater enters the shell through the wastewater inlet, forms a water film on the upper surface of each layer of flat sheet film and is discharged through the wastewater outlet;
the front end of the shell is provided with a flue gas inlet, the rear end of the shell is provided with a flue gas outlet, and flue gas enters the shell through the flue gas inlet and is discharged from the flue gas outlet above each layer of flat sheet membranes.
Further, the flat membrane is obliquely arranged in a mode of being high in front and low in back, and the flat membranes are parallel to each other.
Furthermore, the upper end of each layer of flat membrane is provided with a waste water distributor, and the waste water inlet is connected with the waste water distributors of the flat membranes through waste water distribution pipes arranged in the shell.
Furthermore, the lower end of each layer of flat membrane is connected with a wastewater return tank arranged in the shell, and the wastewater return tank is connected with a wastewater outlet.
Further, a flue gas uniform distributor is arranged inside the flue gas inlet.
Further, the inclination angle of the flat membrane is 28-35 degrees.
Further, the distance between the adjacent flat membranes is 80-100 mm.
Further, the length of the flat membrane is 3000-5000 mm.
After the technical scheme is adopted, the utility model discloses the beneficial effect who has does:
the utility model discloses can form the water film that constantly flows because of gravity on dull and stereotyped membrane, the in-process evaporation goes out steam that flows on dull and stereotyped membrane, then takes away steam through the flue gas that flows in dull and stereotyped membrane top to the realization is to the evaporative concentration of waste water, equipment structure is simple, and whole operation process is simple and convenient, and the running cost is low.
Drawings
The present invention will be further explained with reference to the drawings and examples.
FIG. 1 is a sectional view of a flat membrane evaporation and concentration device for residual heat of flue gas from desulfurization waste water according to a preferred embodiment of the present invention;
FIG. 2 is a top view structural diagram of a single-layer flat membrane of the flat membrane evaporation concentration equipment for residual heat of flue gas from desulfurization waste water according to the preferred embodiment of the present invention;
FIG. 3 is a side sectional view of the upper end of the flat membrane evaporation concentration device for residual heat of flue gas from desulfurization waste water according to the preferred embodiment of the present invention;
FIG. 4 is a partial structure diagram of a wastewater uniform distributor of a desulfurization wastewater flue gas waste heat flat membrane evaporation concentration device according to a preferred embodiment of the present invention;
in the figure: the device comprises a shell 1, a flat membrane 2, a wastewater inlet 3, a wastewater outlet 4, a flue gas inlet 5, a flue gas outlet 6, a wastewater uniform distributor 7, a wastewater water distribution pipe 8, a wastewater reflux tank 9, a flue gas uniform distributor 10, water distribution holes 11 and a collecting tank 12.
Detailed Description
To make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the drawings of the embodiments of the present invention are combined to clearly and completely describe the technical solutions of the embodiments of the present invention, and obviously, the described embodiments are some embodiments of the present invention, not all embodiments.
Thus, the following detailed description of the embodiments of the present invention, presented in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
As shown in fig. 1-4, a flat membrane evaporation concentration device for waste heat of flue gas in desulfurization wastewater comprises a shell 1 and a plurality of flat membranes 2 which are obliquely arranged and are arranged in the shell 1 in a multi-layer overlapping manner, wherein a gap is reserved between two adjacent flat membranes 2; the top of the shell 1 is provided with a wastewater inlet 3, the bottom of the shell is provided with a wastewater outlet 4, wastewater enters the shell 1 through the wastewater inlet 3 and flows on the upper surfaces of the flat membrane layers 2 to form uniform water films, and then moisture is continuously evaporated from the surfaces of the wastewater water films and is discharged through the wastewater outlet 4; after being discharged, the wastewater can be heated and then enters the flat plate concentration equipment again for cyclic evaporation concentration until reaching the set concentration. The front end of the shell 1 is provided with a flue gas inlet 5, the rear end of the shell is provided with a flue gas outlet 6, and flue gas enters the shell 1 through the flue gas inlet 5 and is discharged from the flue gas outlet 6 through the upper part of each layer of flat membrane 2.
In order to be able to form a continuously flowing water film on the flat membrane 2 under the influence of gravity, the flat membrane 2 is placed obliquely in a high-low manner.
Specifically, the flat membrane 2 may have a groove-like structure with an opening at the top for facilitating the formation of the water film.
The flat membrane 2 of each layer is parallel to each other, can guarantee the homogeneity on each flat membrane 2.
Preferably, the flat membrane 2 is made of 2507 or 1.4529 steel, and the material has good corrosion resistance.
In order to supply water to each layer of flat membrane 2, the upper end of each layer of flat membrane 2 is provided with a waste water distributor 7, and the waste water inlet 3 is connected with the waste water distributors 7 of the flat membranes 2 through waste water distributing pipes 8 arranged in the shell 1.
As shown in fig. 4, the wastewater distributor 7 may adopt a water pipe structure having uniformly distributed water distribution holes 11, the radial direction of the water pipe is perpendicular to the length direction of the flat membrane 2, and the water pipe is connected to the wastewater distribution pipe 8, and the water is supplied to each layer of the flat membrane 2 through the same wastewater distribution pipe 8.
Preferably, the water distribution holes 11 can be kidney-shaped holes.
As shown in fig. 3, the wastewater distributor 7 is installed inside the upper end of the grooved flat membrane 2, and the water distribution holes 11 are directed toward the flat membrane 2 and have a certain offset angle toward the lower end of the flat membrane 2, so as to facilitate the formation of a water film on the flat membrane 2.
Preferably, the deflection angle α of the water distribution holes 11 is 20 °.
As shown in fig. 1 to 2, in order to discharge the concentrated wastewater, the lower end of each of the flat membrane layers 2 is connected to a wastewater return tank 9 provided in the housing 1, and the wastewater return tank 9 is connected to the wastewater outlet 4.
The lower end of each layer of flat membrane 2 is provided with a collecting tank 12, the end parts of the two ends of the collecting tank 12 are respectively connected with a wastewater return tank 9, and the concentrated wastewater is discharged from a wastewater outlet 4 through the wastewater return tank 9.
In order to uniformly distribute the flue gas above each layer of flat membrane 2, a flue gas uniform distributor 10 is arranged inside the flue gas inlet 5.
Specifically, the flue gas uniform distributor 10 comprises a plurality of arc-shaped guide plates which are stacked, so that flue gas can uniformly enter the layers of the flat membrane 2.
In order to ensure that the water film can be formed under the action of gravity, the inclination angle of the flat membrane 2 is 28-35 degrees.
Preferably, the inclination angle of the flat membrane 2 is 30 degrees, and under the inclination angle, the water membrane can be completely formed, and the water flow speed of the water membrane can be relatively controlled, so that the concentration effect is improved.
The inclination angle of the flat membrane 2 can be designed according to the actual working condition, so that the optimal concentration effect is achieved.
In order to facilitate the passing of the smoke, the distance between the adjacent flat membranes 2 is 80-100 mm.
The length of the flat membrane 2 is 3000-5000 mm.
The distance between adjacent flat membrane 2, the length of the flat membrane 2, the number of layers of the flat membrane 2, etc. can be adjusted according to the actual concentration requirement.
When the desulfurization wastewater is concentrated, the wastewater enters the wastewater distribution pipe 8 from the wastewater inlet 3, then flows into a waste water uniform distributor 7 at the upper end of each layer of flat membrane 2, a water film formed by waste water is uniformly covered on the surface of the flat membrane 2, and the wastewater flows uniformly from top to bottom on the surface of the flat membrane 2 under the action of self gravity, the flue gas enters the shell 1 through the flue gas inlet 5, and flows above each layer of flat membrane 2 uniformly distributed by the flue gas uniform distributor 10, the flow direction of the flue gas is consistent with that of the water membrane, under the condition of strong convection of the flue gas on the surface of the water membrane, the surface tension of the water molecules in the waste water is broken by the thermal motion to form water vapor which escapes into the flue gas, thereby being taken away fast by the flue gas of water film top, discharging from exhanst gas outlet 6, waste water entering waste water collecting vat 12 after the evaporative concentration then discharge from waste water outlet 4.
The flue gas velocity of flow is big more, and the convective heat transfer ability is strong more, and the evaporation capacity is big more, and the steam and the heat that evaporate on waste water film surface are taken away in time fast to the flue gas of certain speed for the renewal process of gas-liquid contact surface, make the steam pressure of water film top maintain at lower level, the evaporation driving force grow of production, the process of the evaporation of water in the waste water with to diffusion in the flue gas with higher speed.
After being discharged, the wastewater can be heated and then enters the flat plate concentration equipment again for cyclic evaporation concentration, and can be collected for subsequent treatment after reaching the set concentration.
The flue gas entering the desulfurization waste water flue gas waste heat flat membrane evaporation concentration equipment is bypass flue gas which is directly drained from a flue of a desulfurization system, after passing through the desulfurization waste water flue gas waste heat flat membrane evaporation concentration equipment, water vapor which is evaporated in a concentrating mode enters the flue and enters an FGD desulfurization tower along with the flue gas, the temperature of the flue gas and the specific resistance of dust can be reduced, the dust removal efficiency of electric dust removal is further improved, meanwhile, the water consumption of FGD is also reduced, and the desulfurization dust removal efficiency is increased.
In light of the foregoing, it will be apparent to those skilled in the art from this disclosure that various changes and modifications can be made without departing from the spirit and scope of the invention. The technical scope of the present invention is not limited to the content of the specification, and must be determined according to the scope of the claims.
Claims (8)
1. The flat membrane evaporation concentration equipment for the waste heat of the flue gas in the desulfurization wastewater is characterized by comprising a shell (1) and a plurality of flat membranes (2) which are obliquely arranged and are arranged in the shell (1) in a multi-layer overlapping mode, wherein a gap is reserved between every two adjacent flat membranes (2);
the top of the shell (1) is provided with a wastewater inlet (3), the bottom of the shell is provided with a wastewater outlet (4), wastewater enters the shell (1) through the wastewater inlet (3), water is evaporated after water films are formed on the upper surfaces of the flat sheet membranes (2), and the rest desulfurization wastewater is discharged through the wastewater outlet (4);
the front end of the shell (1) is provided with a flue gas inlet (5), the rear end of the shell is provided with a flue gas outlet (6), and flue gas enters the shell (1) through the flue gas inlet (5) and is discharged from the flue gas outlet (6) through the upper part of each layer of flat membrane (2).
2. The flat membrane evaporation and concentration equipment for the waste heat of desulfurization waste water and flue gas as claimed in claim 1, wherein the flat membranes (2) are arranged in an inclined manner in a front-to-back low manner, and the flat membranes (2) are parallel to each other.
3. The flat membrane evaporation concentration equipment for waste heat of desulfurization waste water and flue gas as claimed in claim 1, characterized in that the upper end of each layer of flat membrane (2) is provided with a waste water distributor (7), and the waste water inlet (3) is connected with the waste water distributors (7) of the flat membranes (2) through waste water distribution pipes (8) arranged in the shell (1).
4. The flat membrane evaporation concentration equipment for waste heat of desulfurization waste water and flue gas as claimed in claim 1, characterized in that the lower end of each layer of flat membrane (2) is connected with a waste water reflux tank (9) arranged in the shell (1), and the waste water reflux tank (9) is connected with the waste water outlet (4).
5. The flat membrane evaporation concentration equipment for waste heat of desulfurization waste water and flue gas as claimed in claim 1, wherein a flue gas uniform distributor (10) is arranged inside the flue gas inlet (5).
6. The flat membrane evaporation and concentration equipment for the waste heat of desulfurization wastewater and flue gas as claimed in claim 1, wherein the inclination angle of the flat membrane (2) is 28-35 °.
7. The flat membrane evaporation and concentration equipment for the waste heat of desulfurization waste water and flue gas as claimed in claim 1, wherein the distance between adjacent flat membranes (2) is 80-100 mm.
8. The flat membrane evaporation and concentration equipment for waste heat of desulfurization wastewater and flue gas as claimed in claim 1, wherein the length of the flat membrane (2) is 3000-5000 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022694203.9U CN213802996U (en) | 2020-11-19 | 2020-11-19 | Desulfurization waste water flue gas waste heat flat membrane evaporation concentration equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022694203.9U CN213802996U (en) | 2020-11-19 | 2020-11-19 | Desulfurization waste water flue gas waste heat flat membrane evaporation concentration equipment |
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| Publication Number | Publication Date |
|---|---|
| CN213802996U true CN213802996U (en) | 2021-07-27 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022694203.9U Active CN213802996U (en) | 2020-11-19 | 2020-11-19 | Desulfurization waste water flue gas waste heat flat membrane evaporation concentration equipment |
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| CN (1) | CN213802996U (en) |
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- 2020-11-19 CN CN202022694203.9U patent/CN213802996U/en active Active
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