CN217947819U - Processing system of water treatment softened sludge - Google Patents
Processing system of water treatment softened sludge Download PDFInfo
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- CN217947819U CN217947819U CN202221164162.5U CN202221164162U CN217947819U CN 217947819 U CN217947819 U CN 217947819U CN 202221164162 U CN202221164162 U CN 202221164162U CN 217947819 U CN217947819 U CN 217947819U
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Abstract
The utility model discloses a treatment system for water treatment of softened sludge, which comprises a raw water pipeline, a first coagulating sedimentation tank, a first chemical adding device, a concentration tank and a flue gas desulfurization system; the delivery port of raw water pipeline and the water inlet intercommunication of first coagulating sedimentation pond, the play medicine mouth of first charge device and the medicine mouth intercommunication of advancing of first coagulating sedimentation pond, the mud discharging port of first coagulating sedimentation pond and the mud inlet intercommunication of concentrated pond, the mud discharging port of concentrated pond and the feed inlet intercommunication of the joining in marriage thick liquid groove of flue gas desulfurization system. The utility model has the advantages that: the utility model has simple connection structure and easy realization; the quality of gypsum after later-stage flue gas desulfurization is ensured, and the economic benefit of an enterprise is improved; the full recycle of sewage softening mud has been realized, has improved the economic benefits of enterprise, avoids simultaneously that the mud stockpiling occupies a large amount of lands, and then has avoided the threat to the environment.
Description
The technical field is as follows:
the utility model relates to a processing system, in particular to processing system of water treatment softened sludge.
Background art:
in the water treatment process in the industries of municipal sewage, coal chemical industry, power plants and the like, the method for softening the wastewater by using lime is widely applied due to the high environmental protection degree, strong adaptability, low operation cost, capability of removing various impurities in water and easiness in obtaining lime slurry. In the wastewater treatment process, the sludge generated by softening the wastewater is accumulated and stored in a large amount due to immature subsequent treatment technology and high treatment cost. At present, the sludge is mainly treated by adopting a dewatering treatment or landfill mode, and with the stricter national environmental protection requirements, the sludge with larger yield can not be effectively treated due to the limitation on the types of landfill objects and the scale of landfill sites. The long-term storage of the sludge not only occupies a large amount of land, but also poses great threat to the environment, so that the efficient treatment and resource utilization of the softened sludge become important problems to be urgently solved by the industry.
At present, softened sludge is used for flue gas desulfurization and then gypsum is produced, the resource utilization of softened sludge is realized, but magnesium hydroxide and the like formed in the wastewater softening process in the softened sludge can influence the quality of desulfurization by-product desulfurized gypsum, the quality of gypsum is reduced, and the economic benefit of enterprises is further reduced.
The utility model has the following contents:
an object of the utility model is to provide a connection structure is simple, has realized the abundant recycle of sewage softening mud, has improved enterprise economic benefits's water treatment softening mud's processing system.
The utility model discloses by following technical scheme implement: the patent aims at providing a treatment system for water treatment softened sludge, which comprises a raw water pipeline, a first coagulating sedimentation tank, a first dosing device, a concentration tank and a flue gas desulfurization system; the water outlet of the raw water pipeline is communicated with the water inlet of the first coagulating sedimentation tank, the medicine outlet of the first medicine adding device is communicated with the medicine inlet of the first coagulating sedimentation tank, the sludge discharge port of the first coagulating sedimentation tank is communicated with the sludge inlet of the concentration tank, and the sludge discharge port of the concentration tank is communicated with the feed inlet of the slurry preparation tank of the flue gas desulfurization system.
Further, the flue gas desulfurization system comprises a limestone hopper, a water pipe, the slurry distribution tank, an absorption tower, a flue gas pipeline, a dehydrator and a gypsum storage bin; the discharge end of lime stone hopper with the delivery port of water pipe all with the feed inlet intercommunication of joining in marriage the dressing trough, the liquid outlet of joining in marriage the dressing trough with the inlet intercommunication at absorption tower top, the gas outlet of flue gas pipeline with the air inlet intercommunication of absorption tower bottom, the leakage fluid dram of absorption tower bottom with the inlet intercommunication of hydroextractor, the discharge gate of hydroextractor with the feed inlet intercommunication in gypsum warehouse.
Furthermore, the water outlet of the dehydrator is communicated with the feed inlet of the slurry mixing groove.
Further, the device also comprises a second coagulating sedimentation tank, a second dosing device and a fire retardant crude product preparation system; the water outlet of the first coagulating sedimentation tank is communicated with the liquid inlet of the second coagulating sedimentation tank, the medicine outlet of the second medicine adding device is communicated with the medicine inlet of the second coagulating sedimentation tank, and the sludge discharge port of the second coagulating sedimentation tank is communicated with the feed inlet of the reaction kettle of the fire retardant crude product preparation system.
Further, the fire retardant crude product preparation system comprises the reaction kettle, a surface modifier dosing device, a filter press, a dryer and a fire retardant crude product storage tank; the medicine outlet of the surface modifier medicine adding device is communicated with the medicine inlet of the reaction kettle; the discharge hole of the reaction kettle is communicated with the feed inlet of the filter press, the discharge hole of the filter press is communicated with the feed inlet of the dryer, and the discharge hole of the dryer is communicated with the feed inlet of the fire retardant crude product storage tank.
The utility model has the advantages that: 1. the utility model has simple connection structure and easy realization; the sewage is softened step by step to obtain sludge containing a large amount of calcium carbonate and sludge containing a large amount of magnesium hydroxide, and then the sludge containing a large amount of calcium carbonate is used for flue gas desulfurization, so that the quality of gypsum after the flue gas desulfurization in the later period is ensured, and the economic benefit of enterprises is improved; 2. the sludge containing a large amount of magnesium hydroxide is used for producing the crude product of the flame retardant, so that the sewage softening sludge is fully recycled, the economic benefit of enterprises is improved, and meanwhile, the sludge is prevented from being piled up to occupy a large amount of land, and further the threat to the environment is avoided.
Description of the drawings:
in order to more clearly illustrate the embodiments of the present invention 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 invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a schematic view of the overall structure of the present invention.
The system comprises a raw water pipeline 1, a first coagulating sedimentation tank 2, a first dosing device 3, a concentration tank 4, a flue gas desulfurization system 5, a limestone hopper 51, a water pipe 52, a slurry preparation tank 53, an absorption tower 54, a flue gas pipeline 55, a dehydrator 56, a gypsum storage bin 57, a second coagulating sedimentation tank 6, a second dosing device 7, a fire retardant crude product preparation system 8, a reaction kettle 81, a surface modifier dosing device 82, a filter press 83, a dryer 84 and a fire retardant crude product storage tank 85.
The specific implementation mode is as follows:
as shown in fig. 1, a treatment system for water treatment of softened sludge comprises a raw water pipeline 1, a first coagulating sedimentation tank 2, a first dosing device 3, a concentration tank 4, a flue gas desulfurization system 5, a second coagulating sedimentation tank 6, a second dosing device 7 and a fire retardant crude product preparation system 8; the delivery port of the raw water pipeline 1 is communicated with the water inlet of the first coagulating sedimentation tank 2, the medicine outlet of the first medicine adding device 3 is communicated with the medicine inlet of the first coagulating sedimentation tank 2, the sludge discharge port of the first coagulating sedimentation tank 2 is communicated with the sludge inlet of the concentration tank 4, and the sludge discharge port of the concentration tank 4 is communicated with the feed inlet of the slurry preparation tank 53 of the flue gas desulfurization system 5.
The flue gas desulfurization system 5 comprises a limestone hopper 51, a water pipe 52, a slurry preparation tank 53, an absorption tower 54, a flue gas pipeline 55, a dehydrator 56 and a gypsum storage bin 57; the discharge end of the limestone hopper 51 and the water outlet of the water pipe 52 are both communicated with the feed inlet of the slurry mixing groove 53, the liquid outlet of the slurry mixing groove 53 is communicated with the liquid inlet at the top of the absorption tower 54, the gas outlet of the flue gas pipeline 55 is communicated with the gas inlet at the bottom of the absorption tower 54, the liquid outlet at the bottom of the absorption tower 54 is communicated with the liquid inlet of the dehydrator 56, and the discharge outlet of the dehydrator 56 is communicated with the feed inlet of the gypsum storage bin 57; the water outlet of the dewatering machine 56 is communicated with the feed inlet of the slurry distributing groove 53.
The water outlet of the first coagulating sedimentation tank 2 is communicated with the liquid inlet of the second coagulating sedimentation tank 6, the medicine outlet of the second medicine adding device 7 is communicated with the medicine inlet of the second coagulating sedimentation tank 6, and the sludge discharge port of the second coagulating sedimentation tank 6 is communicated with the feed inlet of the reaction kettle 81 of the fire retardant crude product preparation system 8.
The fire retardant crude product preparation system 8 comprises a reaction kettle 81, a surface modifier dosing device 82, a filter press 83, a dryer 84 and a fire retardant crude product storage tank 85; the medicine outlet of the surface modifier medicine adding device 82 is communicated with the medicine inlet of the reaction kettle 81; the discharge port of the reaction kettle 81 is communicated with the feed port of the filter press 83, the discharge port of the filter press 83 is communicated with the feed port of the dryer 84, and the discharge port of the dryer 84 is communicated with the feed port of the crude flame retardant storage tank 85.
The working principle is as follows: the method comprises the following steps of enabling sewage to enter a first coagulation sedimentation tank 2, adding sodium hydroxide or calcium oxide into the first coagulation sedimentation tank, adjusting the pH of the sewage to be =8-9.5, then adding sodium carbonate to form calcium carbonate precipitation, then adding PAC (polyaluminium chloride) and PAM (polyacrylamide) to carry out coagulation flocculation, and finally precipitating to obtain sludge containing a large amount of calcium carbonate, effectively removing magnesium hydroxide, ensuring the quality of gypsum after later-stage flue gas desulfurization, and improving the economic benefit of enterprises; sludge containing a large amount of calcium carbonate enters a concentration tank 4, the calcium sludge is concentrated to 15-20%, the calcium sludge is conveyed to a slurry preparation tank 53 of a flue gas desulfurization system 5 through a slurry pump, limestone and water are added at the same time for slurry preparation to obtain limestone slurry, the limestone slurry is conveyed to the top of an absorption tower 54, flue gas in a flue gas pipeline 55 enters from the bottom of the absorption tower 54, the limestone slurry carries out desulfurization on the flue gas to form calcium sulfate slurry, the calcium sulfate slurry is conveyed to a dehydrator 56 for dehydration, and the obtained gypsum is conveyed to a gypsum storage bin 57 for storage.
The wastewater from the first coagulation sedimentation tank 2 enters a second coagulation sedimentation tank 6, then sodium hydroxide is added, the pH of the wastewater is adjusted to be =11.5, a reaction is carried out to form magnesium hydroxide precipitate, then PAC and PAM are added for coagulation flocculation, finally sludge containing a large amount of magnesium hydroxide is obtained after the precipitation, the obtained sludge containing a large amount of magnesium hydroxide is sent to a reaction kettle 81 of a fire retardant crude product preparation system 8, a surface modifier is added into the reaction kettle 81, and the reaction is carried out for 30-40min at 30-40 ℃ to obtain modified magnesium hydroxide; then heating to 85-90 ℃ for constant temperature treatment for 3-5h, and then aging at 65-80 ℃ for 2-6h to obtain a slag sample; and then the slag sample is sent to a filter press 83 for dehydration and cleaning, and finally dried by a dryer 84, and the obtained fire retardant crude product is sent to a fire retardant crude product storage tank 85 for storage, so that the full recycling of sewage softened sludge is realized, the economic benefit of enterprises is improved, and meanwhile, the sludge stockpiling is prevented from occupying a large amount of land, and further the threat to the environment is avoided.
The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (5)
1. A treatment system for water treatment softened sludge is characterized by comprising a raw water pipeline, a first coagulating sedimentation tank, a first dosing device, a concentration tank and a flue gas desulfurization system;
the water outlet of the raw water pipeline is communicated with the water inlet of the first coagulating sedimentation tank, the medicine outlet of the first medicine adding device is communicated with the medicine inlet of the first coagulating sedimentation tank, the sludge discharge port of the first coagulating sedimentation tank is communicated with the sludge inlet of the concentration tank, and the sludge discharge port of the concentration tank is communicated with the feed inlet of the slurry preparation tank of the flue gas desulfurization system.
2. The system of claim 1, wherein the flue gas desulfurization system comprises a limestone hopper, a water pipe, the slurry distribution tank, an absorption tower, a flue gas pipeline, a dehydrator and a gypsum silo; the discharge end of lime stone hopper with the delivery port of water pipe all with the feed inlet intercommunication of joining in marriage the dressing trough, the liquid outlet of joining in marriage the dressing trough with the inlet intercommunication at absorption tower top, the gas outlet of flue gas pipeline with the air inlet intercommunication of absorption tower bottom, the leakage fluid dram of absorption tower bottom with the inlet intercommunication of hydroextractor, the discharge gate of hydroextractor with the feed inlet intercommunication in gypsum warehouse.
3. The system of claim 2, wherein the outlet of the dewatering machine is in communication with the inlet of the slurry distribution tank.
4. The system for treating softened sludge for water treatment according to claim 1, further comprising a second coagulation sedimentation tank, a second chemical feeding device and a system for preparing crude flame retardant; the water outlet of the first coagulating sedimentation tank is communicated with the liquid inlet of the second coagulating sedimentation tank, the medicine outlet of the second medicine adding device is communicated with the medicine inlet of the second coagulating sedimentation tank, and the sludge discharge port of the second coagulating sedimentation tank is communicated with the feed inlet of the reaction kettle of the fire retardant crude product preparation system.
5. The system for treating softened sludge in water treatment according to claim 4, wherein the system for preparing crude flame retardant comprises the reaction kettle, a surface modifier dosing device, a filter press, a dryer and a crude flame retardant storage tank; the medicine outlet of the surface modifier medicine adding device is communicated with the medicine inlet of the reaction kettle; the discharge hole of the reaction kettle is communicated with the feed inlet of the filter press, the discharge hole of the filter press is communicated with the feed inlet of the dryer, and the discharge hole of the dryer is communicated with the feed inlet of the fire retardant crude product storage tank.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202221164162.5U CN217947819U (en) | 2022-05-13 | 2022-05-13 | Processing system of water treatment softened sludge |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202221164162.5U CN217947819U (en) | 2022-05-13 | 2022-05-13 | Processing system of water treatment softened sludge |
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| CN217947819U true CN217947819U (en) | 2022-12-02 |
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| CN202221164162.5U Active CN217947819U (en) | 2022-05-13 | 2022-05-13 | Processing system of water treatment softened sludge |
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