CN115925174A - Treatment system and treatment method for resin waste liquid - Google Patents
Treatment system and treatment method for resin waste liquid Download PDFInfo
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- CN115925174A CN115925174A CN202211644795.0A CN202211644795A CN115925174A CN 115925174 A CN115925174 A CN 115925174A CN 202211644795 A CN202211644795 A CN 202211644795A CN 115925174 A CN115925174 A CN 115925174A
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Abstract
The utility model relates to a processing system and a processing method of resin waste liquid, wherein the processing system comprises a resin filter, a resin waste liquid pool, a resin waste liquid delivery pump, a coal-containing waste water collecting pool, a coal-containing waste water discharge pump and a coagulation clarification unit; the coagulation and clarification unit comprises a wastewater cyclone, a flocculating agent coagulant dosing device, a dosing pump, a coal-containing wastewater clarifier and a resin waste liquid clarification tank. This is disclosed through installing coagulation clarification unit additional, utilize waste water swirler effectively to separate the large granule coal quality that has adsorptivity and the fine mud that restraines resin adsorption in the coal-containing waste water, to resin waste liquid and contain the coal waste water and carried out the separation processing, the adsorption characteristic of large granule coal quality in the make full use of coal slime, greatly promote the treatment effeciency of resin waste liquid and coal dust-containing water, the consumption of flocculating agent and coagulant has been reduced, realize the innocent treatment of powder resin filter backwash liquid, reduce the treatment cost.
Description
Technical Field
The disclosure relates to the field of environmental protection and chemistry of thermal power plants, in particular to a system and a method for treating resin waste liquid.
Background
The coal-fired power plant adopts the powder resin covered filter as a condensate fine treatment process, waste liquid generated by regeneration and backwashing of the powder resin covered filter contains a certain amount of resin powder and fiber powder, and the resin powder and the fiber powder are fibrous or powdery, are insoluble in water and common solvents and have stable chemical properties. The resin powder with large particle size has high mechanical strength and large density, can basically realize natural sedimentation, and the density of the fiber powder and the resin powder with small particles is close to that of water, and the resin powder shows brownian motion in the water, the natural sedimentation effect is poor, even if a flocculating agent and a flocculating agent are added, the precipitation effect of the fiber powder and the resin powder with small particles is also poor, and the waste liquid containing organic matters can not be directly discharged, so that the great environmental protection pressure is caused for a thermal power plant.
Therefore, it is necessary to design and develop a low-cost and harmless resin waste liquid treatment system and method.
Disclosure of Invention
The invention aims to provide a treatment system and a treatment method for resin waste liquid, which can realize harmless treatment of powder resin filter backwash liquid, reduce treatment cost and improve utilization rate and treatment efficiency of backwash water.
In order to achieve the above object, a first aspect of the present disclosure provides a system for treating a resin waste liquid, the system including a resin filter, a resin waste liquid tank, a resin waste liquid transfer pump, a coal-containing waste water collection tank, a coal-containing waste water discharge pump, and a coagulation clarification unit;
the coagulation and clarification unit comprises a wastewater cyclone, a flocculating agent coagulant dosing device, a dosing pump, a coal-containing wastewater clarifier and a resin waste liquid clarification tank.
Optionally, the resin waste liquid pool is formed in a wedge shape; the resin waste liquid pool is provided with a liquid level meter; the bottom in resin waste liquid pond is provided with first export, first export with the entry intercommunication of resin waste liquid delivery pump, the export of resin waste liquid delivery pump with resin waste liquid clarification tank intercommunication.
Optionally, a second outlet is arranged at the bottom of the coal-containing wastewater collecting tank, the second outlet is communicated with an inlet of the coal-containing wastewater discharge pump, and an outlet of the coal-containing wastewater discharge pump is communicated with the wastewater cyclone.
Optionally, the top of the wastewater cyclone is in communication with the coal-containing wastewater clarifier and the bottom of the wastewater cyclone is in communication with the resin waste liquor clarifier.
Optionally, the outlet of the dosing pump is communicated with the coal-containing wastewater clarifier and the resin waste liquid clarifier.
Optionally, the treatment system further comprises a coal slime filter-pressing and recovery device, a coal-containing wastewater sludge pump and a resin waste liquid sludge pump;
the inlet of the coal-containing wastewater sludge pump is communicated with the bottom of the coal-containing wastewater clarifier, and the outlet of the coal-containing wastewater sludge pump is communicated with the coal slime filter pressing and recovering device; the inlet of resin waste liquid sludge pump with the bottom intercommunication of resin waste liquid clarification tank, the export of resin waste liquid sludge pump with coal slime filter-pressing and recovery unit intercommunication.
A second aspect of the present disclosure provides a method for treating a resin waste liquid using the treatment system according to the first aspect of the present disclosure, the method comprising:
(1) After backwashing waste liquid of the resin filter enters a resin waste liquid pool, layering occurs after standing, the upper layer is supernatant liquid, and the lower layer is waste liquid containing fiber powder and resin powder; the supernatant overflows to a circulating water system, and the waste liquid containing the fiber powder and the resin powder is conveyed to a resin waste liquid clarification tank through a resin waste liquid conveying pump;
(2) Collecting coal-containing wastewater to a coal-containing wastewater collecting tank through a pipe duct, conveying the coal-containing wastewater to a wastewater cyclone through a coal-containing wastewater discharge pump, separating and desliming the coal-containing wastewater by the wastewater cyclone, enriching separated clay minerals in the cyclone, allowing separated large coal-containing particles to enter a resin waste liquid clarification tank through bottom flow, and obtaining the deslimed coal-containing wastewater in the wastewater cyclone;
(3) The deslimed coal-containing wastewater enters a coal-containing wastewater clarifier through overflow, and then is subjected to dosing flocculation; the large coal-containing particles enter a resin waste liquid clarification tank, are mixed with the waste liquid containing fiber powder and resin powder and then are subjected to dosing flocculation;
(4) And the flocculating agent and coagulant adding device is used for respectively adding the flocculating agent and the coagulant into the coal-containing wastewater clarifier and the resin waste liquid clarification tank through a dosing pump for flocculation and precipitation.
Optionally, the treatment method further comprises the step that the bottom of the coal-containing wastewater clarification tank is communicated with a coal-containing wastewater sludge pump, and the coal-containing wastewater sludge pump conveys the coal-containing wastewater sludge subjected to flocculation precipitation to a coal slime pressure filtration and recovery device.
Optionally, the treatment method further comprises the step of communicating the bottom of the resin waste liquid clarification tank with a resin waste liquid sludge pump, wherein the resin waste liquid sludge pump is used for mixing and conveying the resin and the coal slime after the flocculation and precipitation to a coal slime pressure filtration and recovery device;
and the mud cakes in the coal slime filter pressing and recovery device enter a coal storage yard and are combusted together with the fire coal in the coal storage yard.
Optionally, the standing time in (1) is more than 4 h; the retention time of the resin waste liquid in the resin waste liquid clarification tank is more than 30 min; the temperature in the coal-containing wastewater collection tank is preferably above 5 ℃.
Through above-mentioned technical scheme, this is disclosed through installing coagulation clarification unit additional, utilize waste water swirler effective separation to contain the absorptive large granule coal quality and the fine mud that suppresses the resin adsorption in the coal waste water, the separation treatment has been carried out to resin waste liquid and coal-containing waste water, the adsorption characteristic of large granule coal quality in the make full use of coal slime, greatly promote the treatment effeciency of resin waste liquid and coal-containing water, the consumption of flocculating agent and coagulant has been reduced, realize the innocent treatment of powder resin filter backwash liquid, reduce the treatment cost.
Additional features and advantages of the disclosure will be set forth in the detailed description which follows.
Drawings
The accompanying drawings, which are included to provide a further understanding of the disclosure and are incorporated in and constitute a part of this specification, illustrate embodiments of the disclosure and together with the description serve to explain the disclosure without limiting the disclosure. In the drawings:
FIG. 1 is a schematic view of the structure of a treatment system in example 1.
Description of the reference numerals
1 resin filter, 2 resin waste liquid ponds, 3 resin waste liquid delivery pumps, 4 contain coal waste water collecting pit, 5 contain coal waste water discharge pump, 6 waste water swirler, 7 flocculating agent and coagulant charge devices, 8 contain coal waste water clarification tank, 9 resin waste liquid clarification tank, 10 charge pumps, 11 contain coal waste water sludge pump, 12 resin waste liquid sludge pump, 13 coal slime filter-pressing and recovery unit.
Detailed Description
The following detailed description of the embodiments of the disclosure refers to the accompanying drawings. It should be understood that the detailed description and specific examples, while indicating the present disclosure, are given by way of illustration and explanation only, not limitation.
The first aspect of the present disclosure provides a treatment system for resin waste liquid, which includes a resin filter, a resin waste liquid tank, a resin waste liquid delivery pump, a coal-containing waste water collection tank, a coal-containing waste water discharge pump, and a coagulation clarification unit;
the coagulation and clarification unit comprises a wastewater cyclone, a flocculating agent coagulant dosing device, a dosing pump, a coal-containing wastewater clarifier and a resin waste liquid clarification tank.
The treatment system disclosed realizes effective treatment of the resin waste liquid by additionally arranging the coagulation and clarification unit, has strong operability and cannot influence the original thermal power plant system.
According to one embodiment of the present disclosure, the resin waste liquid pool is formed in a wedge shape; the resin waste liquid pool is provided with a liquid level meter; the bottom in resin waste liquid pond is provided with first export, first export with the entry intercommunication of resin waste liquid delivery pump, the export of resin waste liquid delivery pump with resin waste liquid depositing reservoir intercommunication.
According to an embodiment of the present disclosure, a second outlet is disposed at the bottom of the coal-containing wastewater collecting tank, the second outlet is communicated with an inlet of the coal-containing wastewater discharge pump, and an outlet of the coal-containing wastewater discharge pump is communicated with the wastewater cyclone. According to the disclosure, the coal-containing wastewater collection tank adopts an activated carbon adsorption method, and has the characteristics of simple process, low operation difficulty and flexible application mode; the coal slime in the coal-containing wastewater is porous activated carbon, and has good adsorption treatment capacity on fiber powder and resin powder. The above embodiment is beneficial to improving the treatment efficiency of the resin waste liquid and the water containing the coal dust.
According to an embodiment of the present disclosure, a top of the wastewater cyclone is in communication with the coal-containing wastewater clarifier, and a bottom of the wastewater cyclone is in communication with the resin waste liquid clarifier. The inventor finds that heterogeneous fine mud in the coal-containing wastewater can be adsorbed to a flocculation reagent in a preemptive manner and then covers the surface of coal slime, after resin waste liquid is added, the active adsorption and the reagent coagulation are weaker, and the increase of the content of large particles in the coal-containing wastewater can lead to the increase of the dosage of the coal, so that before the coal-containing wastewater is desliming, primary desliming is carried out on the coal-containing wastewater through a small cone angle hydrocyclone, the earth minerals can be enriched in the overflow of the hydrocyclone, the large particles containing coal are enriched in underflow, and the overflow of the coal-containing wastewater is separately collected to a coal slime clarification tank for dosing and flocculation.
According to the disclosure, the fiber powder and the resin powder are further adsorbed by the coal slurry in the resin waste liquor clarifier to form precipitated coal slurry containing the fiber powder and the resin powder. The flocculating agent is mainly adsorbed with coal slime through the actions of electrostatic bonding, hydrogen bonding, covalent bonding and the like, so that the aggregation of particles is caused, and the coal slime particles adsorbed with fiber powder and resin powder are easier to settle; meanwhile, the coagulant is added into the coal slime water, and the mineral particles are in a dispersed state in the coal slime water due to the fact that negative charges are carried by the mineral particles, at the moment, the coagulant can generate positively charged ions through electrolysis to offset surface charges of the mineral particles and compress a double electric layer to finally coagulate the mineral particles, and the coagulation clarification processing unit finally achieves rapid sedimentation of the coal powder particles, the fiber powder and the resin powder. The treatment system mainly uses the flocculating agent and the flocculating agent, has low cost, effectively improves the utilization rate of backwashing water, reduces the cost of a backwashing process, and simultaneously improves the equipment utilization rate of the powder resin covered filter.
According to an embodiment of the present disclosure, the outlet of the charge pump is in communication with the coal-containing wastewater clarifier and the resin waste liquid clarifier.
According to one embodiment of the disclosure, the treatment system further comprises a coal slime filter pressing and recovery device, a coal-containing wastewater sludge pump and a resin waste liquid sludge pump; in a further embodiment, an inlet of the coal-containing wastewater sludge pump is communicated with the bottom of the coal-containing wastewater clarifier, and an outlet of the coal-containing wastewater sludge pump is communicated with the coal slime filter-pressing and recovering device; the inlet of resin waste liquid sludge pump with the bottom intercommunication of resin waste liquid clarification tank, the export of resin waste liquid sludge pump with coal slime filter-pressing and recovery unit intercommunication.
A second aspect of the present disclosure provides a method for treating a resin waste liquid using the treatment system according to the first aspect of the present disclosure, the method comprising:
(1) After backwashing waste liquid of the resin filter enters a resin waste liquid tank, layering occurs after standing, the upper layer is supernatant, and the lower layer is waste liquid containing fiber powder and resin powder; the supernatant overflows to a circulating water system, and the waste liquid containing the fiber powder and the resin powder is conveyed to a resin waste liquid clarification tank by a resin waste liquid conveying pump;
(2) Collecting coal-containing wastewater to a coal-containing wastewater collecting tank through a pipe duct, conveying the coal-containing wastewater to a wastewater cyclone through a coal-containing wastewater discharge pump, separating and desliming the coal-containing wastewater by the wastewater cyclone, enriching separated clay minerals in the cyclone, allowing separated large coal-containing particles to enter a resin waste liquid clarification tank through bottom flow, and obtaining the deslimed coal-containing wastewater in the wastewater cyclone;
(3) The deslimed coal-containing wastewater enters a coal-containing wastewater clarifier through overflow, and then is subjected to dosing flocculation; the large coal-containing particles enter a resin waste liquid clarification tank, are mixed with the waste liquid containing fiber powder and resin powder and then are subjected to dosing flocculation;
(4) And the flocculating agent and coagulant adding device is used for respectively adding the flocculating agent and the coagulant into the coal-containing wastewater clarifier and the resin waste liquid clarification tank through a dosing pump for flocculation and precipitation.
According to an embodiment of the disclosure, the treatment method further comprises the step of communicating the bottom of the coal-containing wastewater clarification tank with a coal-containing wastewater sludge pump, wherein the coal-containing wastewater sludge pump conveys the coal-containing wastewater sludge subjected to flocculation precipitation to a coal slime filter pressing and recovery device.
According to one embodiment of the disclosure, the treatment method further comprises the step of communicating the bottom of the resin waste liquid clarification tank with a resin waste liquid sludge pump, wherein the resin waste liquid sludge pump mixes and conveys the flocculated and precipitated resin and coal slime to a coal slime filter pressing and recycling device; in a further embodiment, the mud cake in the coal slime filter-pressing and recovery device enters a coal storage yard and is combusted together with the fire coal in the coal storage yard. The above embodiment can achieve harmless disposal of the resin filter backwash waste liquid.
According to an embodiment of the present disclosure, the time of the standing in (1) is 4 hours or more; the retention time of the resin waste liquid in the resin waste liquid clarification tank is more than 30 min; the temperature in the coal-containing wastewater collection tank is preferably above 5 ℃. The above embodiment can ensure effective adsorption of the carbonaceous active carbon to the fiber powder and the resin powder.
The present disclosure is further illustrated by the following examples, but is not to be construed as being limited thereby.
Example 1
(1) After entering a resin waste liquid pool 2, the backwashing waste liquid of the resin filter 1 flows from a high point to a low point, and is layered after standing for 5 hours, wherein the upper layer is supernatant liquid, and the lower layer is waste liquid containing fiber powder and resin powder; the supernatant overflows to a circulating water system, and the waste liquid containing the fiber powder and the resin powder is conveyed to a resin waste liquid clarification tank 9 through a resin waste liquid conveying pump 3;
(2) Collecting coal-containing wastewater to a coal-containing wastewater collecting tank 4 through a pipe duct, conveying the coal-containing wastewater to a wastewater cyclone 6 through a coal-containing wastewater discharge pump 5, separating and desliming the coal-containing wastewater by the wastewater cyclone, enriching separated clay minerals in the cyclone, allowing separated large coal-containing particles to enter a resin waste liquid clarification tank 9 through bottom flow, and obtaining the deslimed coal-containing wastewater in the wastewater cyclone; the main components of the coal-containing wastewater are coal particles and fine mud;
(3) The deslimed coal-containing wastewater enters a coal-containing wastewater clarifier 8 through overflow and then is subjected to dosing flocculation; the coal-containing large particles enter a resin waste liquid clarification tank 9, are mixed with the waste liquid containing fiber powder and resin powder and then are added with medicine for flocculation; mixing the waste liquid containing fiber powder and resin powder with coal containing large particles in a resin waste liquid clarifying tank, and preliminarily adsorbing the fiber powder and the resin powder by the coal containing large particles;
(4) A flocculating agent and coagulating agent dosing device 7 respectively adds flocculating agent and coagulating agent into the coal-containing wastewater clarifier 8 and the resin waste liquid clarifier 9 through a dosing pump 10 for flocculation and precipitation; the adsorption time of the resin waste liquid clarification tank is controlled to be 2 hours, and the resin waste liquid clarification tank is arranged indoors at the temperature of more than 5 ℃; the coal-containing wastewater clarifier and the bottom of the resin waste liquid clarifier are used for conveying sludge after dosing flocculation precipitation to a coal slime filter pressing and recovery device 13 through a coal-containing wastewater sludge pump 11 and a resin waste liquid sludge pump 12, and finally conveying sludge cakes to a boiler for combustion along with coal of a coal storage yard, so that harmless treatment of backwashing waste liquid of the powder resin filter is realized.
The treatment system and the treatment method disclosed by the invention realize the sedimentation of the small-particle resin powder and the fiber powder generated by the resin-covered filter backwashing resin waste liquid, and the sedimentation is finally recovered and combusted in a briquette, so that the harmless treatment of the treated waste liquid is realized; the treatment system and the treatment method effectively separate large-particle coal with adsorbability and fine mud inhibiting resin adsorption from the coal-containing wastewater through the wastewater cyclone, separate the resin waste liquid and the coal-containing wastewater, greatly improve the treatment efficiency of the resin waste liquid and the coal-containing wastewater by utilizing the adsorption characteristic of the large-particle coal in the coal slime, reduce the consumption of the flocculating agent and the coagulant and reduce the treatment cost.
The preferred embodiments of the present disclosure are described in detail with reference to the accompanying drawings, however, the present disclosure is not limited to the specific details of the above embodiments, and various simple modifications may be made to the technical solution of the present disclosure within the technical idea of the present disclosure, and these simple modifications all belong to the protection scope of the present disclosure.
It should be noted that the various features described in the above embodiments may be combined in any suitable manner without departing from the scope of the invention. In order to avoid unnecessary repetition, various possible combinations will not be separately described in this disclosure.
In addition, any combination of various embodiments of the present disclosure may be made, and the same should be considered as the disclosure of the present disclosure, as long as it does not depart from the spirit of the present disclosure.
Claims (10)
1. The treatment system for the resin waste liquid is characterized by comprising a resin filter, a resin waste liquid tank, a resin waste liquid conveying pump, a coal-containing waste water collecting tank, a coal-containing waste water discharge pump and a coagulation clarification unit;
the coagulation and clarification unit comprises a wastewater cyclone, a flocculating agent coagulant dosing device, a dosing pump, a coal-containing wastewater clarifier and a resin waste liquid clarification tank.
2. The treatment system of claim 1, wherein the resin waste reservoir is formed in a wedge shape; the resin waste liquid pool is provided with a liquid level meter; the bottom in resin waste liquid pond is provided with first export, first export with the entry intercommunication of resin waste liquid delivery pump, the export of resin waste liquid delivery pump with resin waste liquid clarification tank intercommunication.
3. The treatment system of claim 1, wherein the bottom of the coal-containing wastewater collection tank is provided with a second outlet, the second outlet being in communication with an inlet of the coal-containing wastewater removal pump, an outlet of the coal-containing wastewater removal pump being in communication with the wastewater cyclone.
4. The treatment system of claim 1, wherein a top of the wastewater cyclone is in communication with the coal-containing wastewater clarifier and a bottom of the wastewater cyclone is in communication with the resin waste clarifier.
5. The treatment system of claim 1, wherein an outlet of the charge pump is in communication with the coal-containing wastewater clarifier and the resin waste liquid clarifier.
6. The treatment system of claim 1, wherein the treatment system further comprises a coal slurry pressure filtration and recovery device, a coal-containing wastewater sludge pump, and a resin waste liquid sludge pump;
the inlet of the coal-containing wastewater sludge pump is communicated with the bottom of the coal-containing wastewater clarifier, and the outlet of the coal-containing wastewater sludge pump is communicated with the coal slime filter pressing and recovering device; the inlet of resin waste liquid sludge pump with the bottom intercommunication of resin waste liquid clarification tank, the export of resin waste liquid sludge pump with coal slime filter-pressing and recovery unit intercommunication.
7. A method for treating a resin waste liquid by using the treatment system according to any one of claims 1 to 6, comprising:
(1) After backwashing waste liquid of the resin filter enters a resin waste liquid pool, layering occurs after standing, the upper layer is supernatant liquid, and the lower layer is waste liquid containing fiber powder and resin powder; the supernatant overflows to a circulating water system, and the waste liquid containing the fiber powder and the resin powder is conveyed to a resin waste liquid clarification tank by a resin waste liquid conveying pump;
(2) Collecting coal-containing wastewater to a coal-containing wastewater collecting tank through a pipe duct, conveying the coal-containing wastewater to a wastewater cyclone through a coal-containing wastewater discharge pump, separating and desliming the coal-containing wastewater by the wastewater cyclone, enriching separated clay minerals in the cyclone, allowing separated large coal-containing particles to enter a resin waste liquid clarification tank through bottom flow, and obtaining the deslimed coal-containing wastewater in the wastewater cyclone;
(3) The deslimed coal-containing wastewater enters a coal-containing wastewater clarifier through overflow, and then is subjected to dosing flocculation; the large coal-containing particles enter a resin waste liquid clarification tank, are mixed with the waste liquid containing fiber powder and resin powder and then are subjected to dosing flocculation;
(4) And the flocculating agent and coagulant adding device is used for respectively adding the flocculating agent and the coagulant into the coal-containing wastewater clarifier and the resin waste liquid clarification tank through a dosing pump for flocculation and precipitation.
8. The treatment method according to claim 7, wherein the bottom of the coal-containing wastewater clarification tank is communicated with a coal-containing wastewater sludge pump, and the coal-containing wastewater sludge pump conveys the coal-containing wastewater sludge after flocculation precipitation to a coal slime pressure filtration and recovery device.
9. The treatment method according to claim 7, further comprising the step of communicating the bottom of the resin waste liquid clarification tank with a resin waste liquid sludge pump, wherein the resin waste liquid sludge pump mixes and conveys the flocculated and precipitated resin and coal slime to a coal slime pressure filtration and recovery device;
and the mud cakes in the coal slime filter pressing and recovery device enter a coal storage yard and are combusted together with the fire coal in the coal storage yard.
10. The treatment method according to claim 7, wherein the standing time in (1) is 4 hours or more;
the retention time of the resin waste liquid in the resin waste liquid clarification tank is more than 30 min; the temperature in the coal-containing wastewater collection tank is above 5 ℃.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202211644795.0A CN115925174A (en) | 2022-12-20 | 2022-12-20 | Treatment system and treatment method for resin waste liquid |
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| CN202211644795.0A CN115925174A (en) | 2022-12-20 | 2022-12-20 | Treatment system and treatment method for resin waste liquid |
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| CN115925174A true CN115925174A (en) | 2023-04-07 |
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| CN202211644795.0A Pending CN115925174A (en) | 2022-12-20 | 2022-12-20 | Treatment system and treatment method for resin waste liquid |
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