CN215798928U - Waste water treatment system in flue gas desulfurization - Google Patents
Waste water treatment system in flue gas desulfurization Download PDFInfo
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- CN215798928U CN215798928U CN202122456620.4U CN202122456620U CN215798928U CN 215798928 U CN215798928 U CN 215798928U CN 202122456620 U CN202122456620 U CN 202122456620U CN 215798928 U CN215798928 U CN 215798928U
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Abstract
The application discloses effluent disposal system in flue gas desulfurization, including desulfurization absorption tower (1), gypsum swirler (2) with the exit linkage of desulfurization absorption tower (1), gypsum thick liquid case (3) with the exit linkage of gypsum swirler (2), vacuum belt hydroextractor (4) with the exit linkage of gypsum thick liquid case (3), recovery tank (7) with the sparge water exit linkage of vacuum belt hydroextractor (4), waste water collecting box (6) with the filtrate water exit linkage of vacuum belt hydroextractor (4), with the outlet linkage of waste water collecting box (6) add medicine and handle the triplex case, with the concentrated clarification tank (12) of the exit linkage that adds medicine and handle the triplex case, with outlet connection's of concentrated clarification tank (12) play water tank (13). The wastewater treatment system in flue gas desulfurization improves the wastewater treatment capacity and efficiency, optimizes the system structure, reduces structural failure points and reduces the workload of operation and maintenance.
Description
Technical Field
The application relates to the technical field of power plant wastewater treatment, in particular to a wastewater treatment system in flue gas desulfurization.
Background
The existing flue gas desulfurization wastewater treatment system comprises the following technical processes that slurry in a desulfurization absorption tower 1 is pumped to a gypsum cyclone 2 through a gypsum discharge pump, underflow is fed to a gypsum thick slurry tank 3 and is pumped to a vacuum belt dehydrator 4 through the gypsum discharge pump, one path of top overflow returns to the absorption tower, one path of top overflow is controlled by an electric door through a wastewater cyclone 14 in a rotational flow mode, the top overflow is fed to a desulfurization wastewater collection box 6, the underflow returns to the absorption tower, the slurry in the wastewater collection box 6 is pumped to a three-way box and a corresponding dosing system through a wastewater lifting pump for treatment, and the slurry overflows to a filtrate water tank for discharge after being clarified by a concentration and clarification tank 12; sludge at the bottom of the concentration and clarification tank 12 is conveyed to the centrifugal dehydrator by a sludge discharge pump. Referring to fig. 1, fig. 1 is a schematic diagram of a typical process of a wastewater treatment system in flue gas desulfurization in the prior art.
However, the wastewater cyclone 14 overflows and enters the wastewater treatment system, the solid content is high, the design is less than 3%, the actual solid content is more than 18%, more gypsum slurry is deposited in the concentration clarification tank 12 and exceeds the treatment capacity of the centrifugal deslimer, so that the centrifugal deslimer is overloaded or fails to operate, after more sludge is accumulated at the bottom of the concentration clarification tank 12, the moment of the sludge scraper of the clarification tank is increased, the sludge scraper and the speed reducer are damaged, and finally the desulfurization wastewater system is paralyzed
In addition, the 14 cyclone stations of the waste water cyclone often have blockage, so that the maintenance time is too long, the waste water discharge of the system is influenced, the slurry of the absorption tower is deteriorated, the desulfurization efficiency is reduced, and the corrosion rate of equipment is increased.
In summary, how to effectively solve the problems of low wastewater treatment capacity and efficiency, multiple structural failure points, large operation and maintenance workload and the like is a problem which needs to be solved by technical personnel in the field at present.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a effluent disposal system in flue gas desulfurization, effluent disposal system in this flue gas desulfurization has improved waste water treatment ability and efficiency, optimizes system architecture, has reduced the structure fault point, has reduced the operation maintenance work load.
In order to solve the technical problem, the application provides the following technical scheme:
the utility model provides a waste water treatment system in flue gas desulfurization, including the desulfurization absorption tower, with the gypsum swirler of the exit linkage of desulfurization absorption tower, with the gypsum thick liquid case of the exit linkage of gypsum swirler, with the vacuum belt hydroextractor of the exit linkage of gypsum thick liquid case, with the recovery tank of the sparge water exit linkage of vacuum belt hydroextractor, with the waste water collecting box of the filtrate water exit linkage of vacuum belt hydroextractor, with the outlet linkage's of waste water collecting box add medicine and handle the triplex, with the concentrated clarification tank of the exit linkage of adding medicine processing triplex, with the outlet connection's of concentrated clarification tank outlet tank.
Preferably, the slurry outlet of the concentration and clarification tank is connected with the slag dragging machine, the gypsum belt dehydrator and the centrifugal desliming machine in parallel.
Preferably, valves are arranged on the slurry outlet of the concentration and clarification tank and branches of the slag conveyor, the gypsum belt dehydrator and the centrifugal desliming machine.
Preferably, the outlet of the recovery water tank is connected with the limestone slurry tank.
Preferably, the overflow port of the gypsum slurry box is connected with the inlet of the desulfurization absorption tower.
Preferably, the dosing treatment triple box comprises a neutralization box, a reaction box and a flocculation box.
The application provides a effluent disposal system in flue gas desulfurization, including desulfurization absorption tower, gypsum swirler, the thick liquid case of gypsum, vacuum belt hydroextractor, recovery water tank, waste water collecting box, add medicine and handle triplex case, concentrated clarification tank, outlet tank, desulfurization absorption tower absorbs the flue gas of power plant, the import of gypsum swirler and the exit linkage of desulfurization absorption tower, desulfurization absorption tower thick liquid is beaten to the gypsum swirler through the gypsum discharge pump. The inlet of the gypsum slurry tank is connected with the outlet of the gypsum cyclone, and the gypsum slurry flows to the gypsum slurry tank. The inlet of the vacuum belt dehydrator is connected with the outlet of the gypsum thick slurry box, and slurry in the gypsum thick slurry box is pumped to the vacuum belt dehydrator through a gypsum discharge pump.
The process water washes the filter cloth and the belt to generate washing water, the gypsum slurry is filtered by the filter cloth to generate filtrate water, the content of chloride ions in the filtrate water is high, the content is as high as that of chloride ions in slurry in an absorption tower, the solid content is low and is within 3%, and the filtrate water and the filter cloth and the belt washing water are separated from each other because the content of chloride ions is reduced after the filtrate water is mixed and diluted with the filter cloth and the belt washing water.
The inlet of the recovery water tank is connected with the flushing water outlet of the vacuum belt dehydrator, and the separated filter cloth flushing water enters the recovery water tank for subsequent use.
The separated filtrate water enters a desulfurization wastewater treatment system, and wastewater is treated by the desulfurization wastewater treatment system, so that the wastewater is separated from good water, and the effective treatment capacity of the wastewater is improved.
The desulfurization wastewater treatment system consists of a wastewater collection box, a dosing treatment triple box, a concentration clarification tank and a water outlet box, wherein the inlet of the wastewater collection box is connected with the filtrate water outlet of the vacuum belt dehydrator. The inlet of the chemical adding treatment triple box is connected with the outlet of the wastewater collecting box, and the slurry in the wastewater collecting box is pumped to the triple box and the corresponding chemical adding system by a wastewater lifting pump for treatment. The inlet of the concentration and clarification tank is connected with the outlet of the dosing treatment triple box, the inlet of the water outlet tank is connected with the outlet of the concentration and clarification tank, and the concentrated and clarification tank is clarified and then overflows to the filtered water tank for discharge.
The wastewater treatment system in flue gas desulfurization provided by the application realizes the separation of wastewater from good water, improves the effective treatment capacity and efficiency of wastewater, reduces the sludge production, reduces the operation and maintenance workload, optimizes the system structure, reduces the structure fault points and reduces the cost; the safe and stable operation of the desulfurization system is ensured, and the water balance of the desulfurization system is not influenced.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a process diagram of a typical flue gas desulfurization wastewater treatment system of the prior art;
FIG. 2 is a process diagram of a wastewater treatment system in flue gas desulfurization according to an embodiment of the present application.
The drawings are numbered as follows:
the system comprises a desulfurization absorption tower 1, a gypsum cyclone 2, a gypsum thick slurry tank 3, a vacuum belt dehydrator 4, a filtrate sump 5, a wastewater collection tank 6, a recovery water tank 7, a limestone slurry tank 8, a neutralization tank 9, a reaction tank 10, a flocculation tank 11, a concentration and clarification tank 12, a water outlet tank 13 and a wastewater cyclone 14.
Detailed Description
The core of this application is to provide a effluent disposal system in flue gas desulfurization, effluent disposal system in this flue gas desulfurization has improved waste water treatment ability and efficiency, optimizes system architecture, and it is many to have reduced the structure fault point, has reduced the operation maintenance work load.
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
Referring to fig. 2, fig. 2 is a process diagram of a wastewater treatment system for flue gas desulfurization according to an embodiment of the present disclosure.
In a specific embodiment, the waste water treatment system in flue gas desulfurization that this application provided, including desulfurization absorption tower 1, gypsum swirler 2 with the exit linkage of desulfurization absorption tower 1, gypsum thick liquid case 3 with the exit linkage of gypsum swirler 2, vacuum belt hydroextractor 4 with the exit linkage of gypsum thick liquid case 3, the recovery water tank 7 with the sparge water exit linkage of vacuum belt hydroextractor 4, the waste water collecting tank 6 with the filtrate water exit linkage of vacuum belt hydroextractor 4, the medicine that adds of the exit linkage of waste water collecting tank 6 handles the triplex, with the concentrated clarification tank 12 of the exit linkage of medicine processing triplex, with the outlet water tank 13 of the exit linkage of concentrated clarification tank 12.
In the structure, the wastewater treatment system in flue gas desulfurization comprises a desulfurization absorption tower 1, a gypsum cyclone 2, a gypsum thick slurry tank 3, a vacuum belt dehydrator 4, a recovery water tank 7, a wastewater collection tank 6, a dosing treatment triple box, a concentration clarification tank 12 and a water outlet tank 13, wherein the desulfurization absorption tower 1 absorbs flue gas of a power plant, the inlet of the gypsum cyclone 2 is connected with the outlet of the desulfurization absorption tower 1, and slurry in the desulfurization absorption tower 1 is pumped to the gypsum cyclone 2 through a gypsum discharge pump. The inlet of the gypsum thick slurry box 3 is connected with the outlet of the gypsum cyclone 2, and the gypsum slurry flows to the gypsum thick slurry box 3. The import of vacuum belt hydroextractor 4 and the exit linkage of gypsum thick liquid case 3, the thick liquid of gypsum thick liquid case 3 is beaten to vacuum belt hydroextractor 4 through the gypsum discharge pump, and the import of filtrating sump 5 and the exit linkage of vacuum belt hydroextractor 4, and the filtrating water gets into filtrating sump 5.
The process water washes the filter cloth and the belt to generate washing water, the gypsum slurry is filtered by the filter cloth to generate filtrate water, the content of chloride ions in the filtrate water is high, the content is as high as that of chloride ions in slurry in an absorption tower, the solid content is low and is within 3%, and the filtrate water and the filter cloth and the belt washing water are separated from each other because the content of chloride ions is reduced after the filtrate water is mixed and diluted with the filter cloth and the belt washing water.
An inlet of the recovery water tank 7 is connected with a washing water outlet of the vacuum belt dehydrator 4, and the separated filter cloth washing water enters the recovery water tank 7 for subsequent use.
And the separated filtrate water in the filtrate sump 5 enters a desulfurization wastewater treatment system, and the wastewater is treated by the desulfurization wastewater treatment system, so that the separation of the wastewater from the treated water is realized, and the effective treatment capacity of the wastewater is improved.
The desulfurization wastewater treatment system is composed of a wastewater collection box 6, a dosing treatment triple box, a concentration clarification tank 12 and a water outlet box 13, wherein the inlet of the wastewater collection box 6 is connected with the filtrate water outlet of the vacuum belt dehydrator 4. The inlet of the chemical adding treatment triple box is connected with the outlet of the wastewater collecting box 6, and the slurry in the wastewater collecting box 6 is pumped to the triple box and the corresponding chemical adding system by a wastewater lifting pump for treatment. The inlet of the concentration and clarification tank 12 is connected with the outlet of the dosing treatment triple box, the inlet of the water outlet tank 13 is connected with the outlet of the concentration and clarification tank 12, and the concentrated and clarification tank 12 is used for clarifying the water and then the water overflows to the filtering water tank 13 for discharging.
It should be noted that, in the existing waste water treatment system in flue gas desulfurization, there is a waste water cyclone 14, there is an electric door from the gypsum cyclone 2 to the waste water cyclone 14, the electric door of the system for removing waste water from the gypsum cyclone 2 to the waste water cyclone 14 is closed, the waste water cyclone 14 is not removed after the closing, the waste water cyclone 14 is not filled with slurry, the system for waste water cyclone 14 is temporarily reserved, the underflow of the cyclone of the gypsum cyclone 2 is finally removed to the vacuum belt dehydrator 4, the overflow is removed to the absorption tower, the filtrate water is removed to the waste water collecting tank 6 after reaching the vacuum belt dehydrator 4, and the filtrate water of the vacuum belt dehydrator 4 is used to replace the waste water of the desulfurization cyclone, so as to omit the removal of the waste water cyclone 14 and reduce the workload. For the newly established wastewater treatment system in flue gas desulfurization, the wastewater cyclone 14 is not directly arranged, the wastewater cyclone 14 and the electric door are not arranged, the effluent quality of wastewater treatment is improved, the problem that the wastewater cyclone 14 is blocked frequently is solved, and the operation cost is reduced.
The wastewater treatment system in flue gas desulfurization provided by the application realizes the separation of wastewater from good water, improves the effective treatment capacity and efficiency of wastewater, reduces the sludge production, reduces the operation and maintenance workload, optimizes the system structure, reduces the structure fault points and reduces the cost; the safe and stable operation of the desulfurization system is ensured, and the water balance of the desulfurization system is not influenced.
The above-mentioned waste water treatment system in flue gas desulfurization is only a preferred scheme, and is not particularly limited thereto, and on this basis, it can make targeted adjustment according to the actual need, so as to obtain different embodiments, the slurry outlet of the concentration and clarification tank 12 is connected with the slag dragging machine, the gypsum belt dehydrator and the centrifugal desliming machine in parallel, that is to say, the bottom sludge of the concentration and clarification tank 12 can be discharged into the slag dragging machine, the gypsum belt dehydrator and the centrifugal desliming machine through the conveying pump of the sludge discharge pump, and can be discharged into any one alone, or two, or three together.
Because the solid content of the treated filtrate water is lower, the gypsum deposition slurry at the bottom of the desulfurization concentration clarification tank 12 is also less, and one path is added from the concentration clarification tank 12 to the gypsum belt dehydrator, so that the dehydration effect and the gypsum quality are not influenced. Meanwhile, a slag removing machine system is added, and the operation of the slag removing machine system is not influenced through experimental demonstration. Normally, the sludge is pumped to a vacuum belt conveyor and a slag conveyor, the consumption of the slag conveyor and the consumption of the belt conveyor are met, and the sludge is discharged to a centrifugal desliming machine under special conditions, so that the power consumption and the maintenance workload are reduced.
Further optimize above-mentioned technical scheme, the technical staff in this field can carry out a plurality of changes to above-mentioned embodiment according to the difference of concrete occasion, be provided with the valve on the thick liquid outlet of concentrated clarification tank 12 and the branch road of dragveyer, gypsum belt hydroextractor and centrifugal desliming machine, through the break-make of valve control branch road to this control concentrated clarification tank 12's mud is discharged and is gone into dragveyer, gypsum belt hydroextractor and/or centrifugal desliming machine, and control is convenient.
In another more reliable embodiment, on the basis of any one of the above embodiments, the outlet of the recovery water tank 7 is connected with the limestone slurry tank 8, the filter cloth flushing water enters the recovery water tank 7 after separation for pulping and water supplementing, and specifically flows into the limestone slurry tank 8 to be used as pulping and water supplementing replacement water, so that the flushing water of the recovery water tank 7 is fully utilized, and energy is saved.
On the basis of the above specific embodiments, the overflow port of the gypsum slurry tank 3 is connected with the inlet of the desulfurization absorption tower 1, and the liquid overflowing from the gypsum slurry tank 3 returns to the desulfurization absorption tower 1, so that the recycling is realized, and the liquid utilization rate is improved.
Preferably, the outlet of the gypsum cyclone 2 is arranged at the bottom, facilitating the gypsum slurry in the gypsum cyclone 2 to flow as far as possible into the gypsum thick stock tank 3.
On the basis of the above-mentioned each specific embodiment, add medicine treatment three-header and include neutralization tank 9, reaction tank 10, flocculation case 11, for example add lime milk in neutralization tank 9, add polyferric sulfate in reaction tank 10, add coagulant aid in flocculation case 11, the inside thick liquid of waste water collecting tank 6 is beaten to three-header and corresponding medicine system through the waste water elevator pump and is handled, handles the filtrating with this.
The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.
The waste water treatment system in flue gas desulfurization provided by the application is described in detail above. The principles and embodiments of the present application are explained herein using specific examples, which are provided only to help understand the method and the core idea of the present application. It should be noted that, for those skilled in the art, it is possible to make several improvements and modifications to the present application without departing from the principle of the present application, and such improvements and modifications also fall within the scope of the claims of the present application. Thus, the present application is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (6)
1. The utility model provides a waste water treatment system in flue gas desulfurization, which characterized in that, including desulfurization absorption tower (1), gypsum swirler (2) with the exit linkage of desulfurization absorption tower (1), gypsum thick liquid case (3) with the exit linkage of gypsum swirler (2), vacuum belt hydroextractor (4) with the exit linkage of gypsum thick liquid case (3), recovery tank (7) with the sparge water exit linkage of vacuum belt hydroextractor (4), waste water collecting box (6) with the filtrate water exit linkage of vacuum belt hydroextractor (4), add medicine treatment triplex case with the exit linkage of waste water collecting box (6), with add medicine treatment triplex case's exit linkage's concentrated clarification tank (12), with outlet connection's play water tank (13) of concentrated clarification tank (12).
2. The wastewater treatment system in flue gas desulfurization according to claim 1, wherein the slurry outlet of the concentration and clarification tank (12) is connected in parallel with a dragveyer, a gypsum belt dehydrator and a centrifugal desliming machine.
3. The wastewater treatment system in flue gas desulfurization according to claim 2, wherein valves are provided on the slurry outlet of the concentration and clarification tank (12) and the branches of the slag conveyor, the gypsum belt dehydrator and the centrifugal deslimer.
4. A system for treating waste water in flue gas desulfurization according to any one of claims 1 to 3, wherein the outlet of the recovery water tank (7) is connected to a limestone slurry tank (8).
5. The wastewater treatment system in flue gas desulfurization according to claim 4, wherein the overflow port of the gypsum slurry tank (3) is connected to the inlet of the desulfurization absorption tower (1).
6. The wastewater treatment system in flue gas desulfurization according to claim 4, wherein the dosing treatment triple tank comprises a neutralization tank (9), a reaction tank (10), and a flocculation tank (11).
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| Application Number | Priority Date | Filing Date | Title |
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| CN202122456620.4U CN215798928U (en) | 2021-10-12 | 2021-10-12 | Waste water treatment system in flue gas desulfurization |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202122456620.4U CN215798928U (en) | 2021-10-12 | 2021-10-12 | Waste water treatment system in flue gas desulfurization |
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| CN215798928U true CN215798928U (en) | 2022-02-11 |
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| CN202122456620.4U Active CN215798928U (en) | 2021-10-12 | 2021-10-12 | Waste water treatment system in flue gas desulfurization |
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