CN214383746U - Power generation system for comprehensive utilization of town sewage - Google Patents
Power generation system for comprehensive utilization of town sewage Download PDFInfo
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- CN214383746U CN214383746U CN202022915334.5U CN202022915334U CN214383746U CN 214383746 U CN214383746 U CN 214383746U CN 202022915334 U CN202022915334 U CN 202022915334U CN 214383746 U CN214383746 U CN 214383746U
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Abstract
The utility model provides a power generation system for comprehensive utilization of town sewage, which comprises a sedimentation tank, an oil-water separation device, a water storage device, a purification device, a softening device, an anaerobic fermentation device, a methane storage device, a slag-liquid separation device, a methane power generation device, a cooling device, a waste heat boiler and a screw expansion power generation device, wherein the town sewage enters the sedimentation tank for sewage and sludge separation, the sludge enters the anaerobic fermentation device for fermentation to generate methane for generating electric energy, the sewage enters the cooling device after purification and softening, the cooling device simultaneously cools the methane power generation device and the screw expansion power generation device, cooling water absorbs the heat of the power generation device and then is introduced into the waste heat boiler, and the steam enters the screw expansion power generation device to do work to generate electric energy, and the exhaust gas enters the anaerobic fermentation device to assist in fermentation. The utility model discloses a can carry out effective treatment, furthest's improvement resourceful comprehensive utilization efficiency to town sewage.
Description
Technical Field
The utility model relates to a water treatment technical field especially relates to a town sewage comprehensive utilization's power generation system.
Background
With the rapid development of economy, the living standard and the living quality of people are greatly improved, the promotion of urbanization is accelerated, so that the water resource supply is increasingly tense, the total wastewater discharge amount of China is on the rise in 2011, and the sewage treatment demand is continuously improved. Based on the serious worry about the water environment, the strengthening of water pollution prevention and the town sewage treatment are listed as the key contents of the environment treatment during the thirteen-five period.
In recent years, the discharge amount of industrial wastewater in China is reduced year by year, the discharge amount of domestic sewage in cities and towns is increased year by year, the traditional sewage treatment technology has more serious problems, such as insufficient capital, high cost, low efficiency, low comprehensive utilization degree of resources and the like, the common sewage treatment and the sludge treatment are separately carried out, the sewage treatment is directly used as greening water for discharge, the utilization degree of the purified water is not high, the sludge after the sewage treatment is subjected to garbage landfill or incineration, the sludge cannot be recycled, even the environment is seriously polluted, the biogas power generation has the characteristics of efficiency creation, energy conservation, safety, environmental protection and the like, is a distributed energy source which is widely distributed and low in cost, a biogas power generation system is established in some sludge treatment plants, a large amount of water sources are consumed during anaerobic fermentation, the utilization rate of the biogas heat value is low during the biogas power generation, and the power generation efficiency is reduced, and the marsh gas generating set cools off in order to make the cooling effect better simultaneously to reduction in production cost, uses the running water to cool off the generating set, has caused the waste of water resource.
Therefore, the invention is urgently needed to provide a power generation system and a method for comprehensively utilizing town sewage, which can effectively treat the sewage, reduce the treatment cost, reduce the resource waste, improve the power generation efficiency and furthest improve the comprehensive utilization degree of resources.
SUMMERY OF THE UTILITY MODEL
In view of this, the utility model aims at providing a power generation system of town sewage integrated utilization to solve above-mentioned technical problem.
In order to achieve the above purpose, the technical scheme of the utility model is realized like this:
the bottom of the sedimentation tank is communicated with the anaerobic fermentation device, the upper part of the sedimentation tank is sequentially communicated with the oil-water separation device, the water storage device, the purification device and the softening device, and the town sewage is separated into sewage and sludge through the sedimentation tank and then respectively enters the corresponding treatment devices for treatment;
the anaerobic fermentation device is communicated with a biogas storage device, a residue-liquid separation device and a water storage device, the anaerobic fermentation device comprises a peripheral hydrolysis chamber and an internal fermentation chamber, the hydrolysis chamber is annularly enclosed outside the fermentation chamber, the hydrolysis chamber is communicated with the bottom of the fermentation chamber, the hydrolysis chamber is also provided with a heating device, the fermentation chamber is communicated with the residue-liquid separation device at the bottom, and the upper part of the fermentation chamber is communicated with the biogas storage device;
the biogas storage device comprises an adsorption chamber and a storage chamber, the adsorption chamber is annularly enclosed outside the storage chamber, a plurality of adsorption layers are annularly arranged in the adsorption chamber, adsorption materials are filled in the adsorption layers, the bottom outside the adsorption chamber is communicated with the anaerobic fermentation device, the storage chamber is communicated with the interior of the adsorption chamber, and the upper part of the storage chamber is communicated with the biogas power generation device;
the methane power generation device is communicated with the methane storage device and the waste heat boiler, the stored methane is used for doing work to generate electric energy, and the flue gas with waste heat is discharged into the waste heat boiler to absorb the waste heat;
the cooling device is communicated with the softening device, the methane power generation device and the waste heat boiler, softened soft water is directly or indirectly used for unit cooling of the methane power generation device, the cooled water is introduced into the waste heat boiler to generate steam, the waste heat boiler is communicated with the screw expansion power generation device to apply work to generate electric energy, the cooling device comprises a water inlet, a water outlet, a first containing cavity and a second containing cavity, the first containing cavity is communicated with the water inlet, the second containing cavity is communicated with the water outlet, the soft water before cooling is introduced into the first containing cavity from the water inlet, the cooled soft water is discharged from the second containing cavity through the water outlet, the water inlet is communicated with the softening device, and the water outlet is communicated with the waste heat boiler;
the screw expansion power generation device is also communicated with the cooling device and the anaerobic fermentation device, the cooling device is used for directly or indirectly cooling the unit, and exhaust after acting is introduced into the anaerobic fermentation device;
the slag-liquid separation device is also communicated with the sedimentation tank, liquid obtained after solid-liquid separation of slag-liquid is introduced into the sedimentation tank, and solid is collected as fertilizer;
the softening device is also directly communicated with the waste heat boiler, and water is directly supplemented to the waste heat boiler when the water quantity of the waste heat boiler is insufficient.
The town sewage is rich in organic matters, the cement is clarified after the town sewage is precipitated, the sewage and the precipitated sludge are effectively treated at the same place, the sludge rich in the organic matters is fermented to obtain the biogas, the biogas is used for power generation, the biogas residues are recycled as fertilizers, the heat exchange of the generator set is cooled by the treated purified water, the heat after the exchange is reasonably utilized, the system is compact in structure, and the waste of water resources and heat is avoided.
Further, a sludge inlet is formed in the outer side of the lower portion of the hydrolysis chamber and connected with the sedimentation tank, a water inlet and an exhaust inlet are formed in the upper portion of the hydrolysis chamber and communicated with a water storage device, and the exhaust inlet is connected with a screw expansion power generation device; the middle part of the hydrolysis chamber is provided with at least one heater, the middle part of the fermentation chamber is provided with a stirrer, the stirrer penetrates through the top wall of the fermentation chamber to be inserted, the bottom of the fermentation chamber is provided with a slag-liquid outlet, the slag-liquid outlet is communicated with the slag-liquid separation device, the upper part of the fermentation chamber is also provided with a methane outlet, and the methane outlet is communicated with the methane storage device. The anaerobic fermentation device is reasonable in structure due to the arrangement, and hydrolysis and fermentation processes are facilitated.
Furthermore, a biogas inlet is formed in the bottom outside the adsorption chamber and communicated with the biogas outlet, a first partition plate is arranged between the adsorption layers, a second partition plate is arranged between the adsorption chamber and the storage chamber, the first partition plate and the second partition plate are filter plates and can penetrate gas, a biogas conveying port is formed in the upper portion of the storage chamber, and the biogas conveying port is communicated with the biogas power generation device. Biogas enters the adsorption chamber from the bottom and is discharged from the top, so that the biogas can be fully adsorbed and purified, and the arrangement of the partition plate can enable the biogas to enter the storage chamber for enrichment.
Further, the cooling device comprises a first inlet, a second inlet, a first outlet and a second outlet, wherein the first inlet and the first outlet are communicated with the biogas power generation device and are used for inputting or outputting a medium for cooling the biogas power generation device; the second inlet and the second outlet are communicated with the screw expansion power generation device and are used for inputting or outputting a medium for cooling the screw expansion power generation device. After the two power generation devices start, the cooling device can cool the two power generation devices simultaneously, and cooling water can absorb more heat, so that the system is more compact and can play a role in saving energy.
Furthermore, first entry, second entry, first export and second export all communicate the first appearance chamber, the bucking is provided with first tuber pipe between first entry and the first export, the bucking is provided with the second tuber pipe between second entry and the second export, first tuber pipe and second tuber pipe set up at first appearance intracavity, are cooled down by the soft water that gets into first appearance chamber. This setting adopts indirect cooling mode, and the tuber pipe carries out the air cooling to generating set, is cooled off the tuber pipe after the heat absorption by soft water again, can the using water wisely.
Furthermore, the inside extension of water inlet is provided with condenser tube, is provided with a plurality of shower nozzles on the condenser tube. The shower nozzle setting can spray the cooling to the tuber pipe, and a plurality of shower nozzles increase cooling scope.
Furthermore, a plurality of fins are arranged on the first air pipe and the second air pipe. The arrangement of the fins can increase the heat dissipation area.
Furthermore, the first inlet and the second inlet are communicated with the second accommodating cavity, the first outlet and the second outlet are communicated with the first accommodating cavity, soft water entering the first accommodating cavity flows out through the first outlet and the second outlet to cool the corresponding power generation device, and the cooled soft water flows into the second accommodating cavity through the first inlet and the second inlet. This setting is direct to generating set water-cooling, and the cooling is more direct, can cool off rapidly, and the effect is better, and the preheating effect of second appearance chamber water is better moreover.
Further, purifier includes the filter, the filter adopts membrane filtration technique, for one or several kinds in micro-filtration membrane filtration technique, milipore filter filtration technique or the nanofiltration membrane filtration technique, should set up and can effectually purify sewage to can reach degerming effect.
A town sewage comprehensive utilization's power generation system, compare with prior art and have following advantage:
(1) the utility model discloses a power generation system that town sewage was used multipurposely, the effective sewage treatment that carries on, the mud that produces in a large number also obtains the effective processing and disposes when the town sewage that is rich in organic matter was used multipurposely, not only can reduce the treatment cost, furthest's improvement resourceful comprehensive utilization efficiency;
(2) the utility model discloses a power generation system that town sewage was used multipurposely utilizes, utilize mud to carry out anaerobic fermentation, adopt sewage after simple processing to hydrolyze before the fermentation, avoid adopting running water to hydrolyze, the marsh gas that produces is used for generating electricity, can be used for cooling generating set after sewage treatment, avoid utilizing the running water to carry out the unit cooling, make the water resource obtain rational utilization, avoided the wasting of resources;
(3) a power generation system that town sewage comprehensive utilization, waste heat among the power generation process is retrieved to be used for once more in the production electric energy, more play the energy saving, improve the effect of resourceful comprehensive utilization efficiency.
Drawings
The accompanying drawings, which form a part hereof, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention without undue limitation. In the drawings:
FIG. 1 is a schematic diagram of a power generation system for comprehensive utilization of town sewage according to an embodiment of the present invention;
FIG. 2 is a structural diagram of a power generation system for comprehensive utilization of town sewage according to an embodiment of the present invention;
FIG. 3 is a schematic diagram of an anaerobic fermentation apparatus according to a first embodiment of the present invention;
fig. 4 is a structural diagram of a methane storage device according to a first embodiment of the present invention;
fig. 5 is a structural diagram of a cooling device according to a first embodiment of the present invention;
fig. 6 is a structural diagram of a cooling device according to a second embodiment of the present invention.
Description of reference numerals:
1. a sedimentation tank; 2. a first variable frequency pump; 3. a first centrifuge; 4. a grease storage device; 5. a water storage device; 6. a filter; 7. a softening device; 8. a second variable frequency pump; 9. a cooling device; 90. a water pump; 91. a first cavity; 92. a second cavity; 93. a water inlet; 931. a cooling water pipe; 932. a spray head; 94. a first outlet; 941. a fin; 942. a first air duct; 95. a first inlet; 96. a second outlet; 961. a second air duct; 97. a second inlet; 98. a water outlet; 99. a fan; 10. a waste heat boiler; 11. a biogas power generation device; 12. an induced draft fan; 14. a screw expansion power generation device; 15. a third variable frequency pump; 16. a biogas residue storage tank; 17. a second centrifuge; 18. a first slurry pump; 19. an anaerobic fermentation device; 190. a stirrer; 191. a hydrolysis chamber; 192. a fermentation chamber; 193. a biogas outlet; 194. an exhaust gas inlet; 195. a slag liquid outlet; 196. a connecting pipe; 197. a sludge inlet; 198. a heater; 199. a water inlet; 20. a second slurry pump; 21. a first control valve; 22. a second control valve; 23. a third control valve; 24. a fourth control valve; 25. a fifth control valve; 26. a sixth control valve; 27. a seventh control valve; 28. an eighth control valve; 29. a biogas storage device; 291. a biogas delivery port; 292. an adsorption chamber; 293. a storage chamber; 294. an adsorption layer; 295. a first separator; 296. a second separator; 297. a biogas inlet; 30. a ninth control valve; 31. a tenth control valve.
Detailed Description
It should be noted that, in the present invention, the embodiments and features of the embodiments may be combined with each other without conflict.
The descriptions in the present application referring to "first", "second", "upper", "lower", "inner", "outer", etc. are for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicit to the number of technical features indicated. Thus, the definition of "first" or "second" feature may explicitly or implicitly include at least one such feature. In addition, the technical solutions in the embodiments can be combined with each other, but it is necessary to be able to realize that the technical solutions in the embodiments can be combined with each other on the basis of the realization of a person having ordinary skill in the art, and all that is required by the present invention is within the protection scope of the present invention.
The present invention will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.
The specific embodiment is shown in fig. 1, and the power generation system for comprehensive utilization of town sewage comprises a sedimentation tank, an oil-water separation device, a water storage device, a purification device, a softening device, an anaerobic fermentation device, a biogas storage device, a residue-liquid separation device, a biogas power generation device, a cooling device, a waste heat boiler and a screw expansion power generation device:
the town sewage is introduced into a sedimentation tank, the bottom of the sedimentation tank is communicated with an anaerobic fermentation device, the settled sludge is input into the anaerobic fermentation device for sludge treatment, the upper part of the sedimentation tank is sequentially connected with an oil-water separation device, a water storage device, a purification device and a softening device, and the sewage is subjected to oil-water separation, purification and softening treatment; carrying out sludge-water separation on the town sewage by using the sedimentation tank so as to clarify the mixed liquid;
the anaerobic fermentation device is communicated with the biogas storage device, the residue-liquid separation device and the water storage device, the anaerobic fermentation device comprises a peripheral hydrolysis chamber and an internal fermentation chamber, sludge mixed with sewage is hydrolyzed and then subjected to anaerobic fermentation to generate biogas which is stored in the biogas storage device, the residue liquid generated after fermentation is introduced into the residue-liquid separation device for solid-liquid separation, and the water storage device can supplement water to the anaerobic fermentation device in time; the anaerobic fermentation device is used for hydrolyzing and fermenting the sludge and decomposing the sludge into methane and slag liquid, the slag liquid separation device separates the slag liquid into liquid and solid fertilizer, so that the effective utilization of resources is realized, the water storage device can provide water when the water needed by the sludge hydrolysis is insufficient, and tap water is prevented from being used during the hydrolysis, so that the waste of water sources is avoided;
the biogas storage device comprises a peripheral adsorption chamber and an internal storage chamber, and can purify and store biogas; the biogas storage device integrates purification and storage functions, avoids additionally arranging a purifier and saves the field;
the methane power generation device is communicated with the methane storage device and the waste heat boiler, the stored methane is used for doing work to generate electric energy, and the flue gas with waste heat is discharged into the waste heat boiler to absorb the waste heat; the heat energy generated by the methane power generation is utilized to a great extent;
the cooling device is communicated with the softening device, the methane power generation device and the waste heat boiler, the softened soft water is directly or indirectly used for cooling the methane power generation device, the cooled water is introduced into the waste heat boiler and is heated by waste heat to generate steam, the waste heat boiler is communicated with the screw expansion power generation device, and the steam is introduced into the screw expansion power generation device to do work to generate electric energy; the water resource and the heat energy generated by the methane power generation are effectively utilized, and the comprehensive utilization rate of the resource is improved;
the screw expansion power generation device is also communicated with the cooling device and the anaerobic fermentation device, the cooling device is used for directly or indirectly cooling the unit, and exhaust gas after acting is introduced into a hydrolysis chamber of the anaerobic fermentation device; water resources are effectively utilized, and exhaust gas with certain heat after power generation is introduced into a hydrolysis chamber of the anaerobic fermentation device to provide heat for hydrolysis;
the slag-liquid separation device is also communicated with the sedimentation tank, liquid obtained after solid-liquid separation of slag-liquid is introduced into the sedimentation tank, the solid is collected as fertilizer, the liquid can be purified and utilized again after being recovered, and the solid is rich in nutrients and serves as fertilizer, so that reasonable utilization of resources is realized;
the softening device is also directly communicated with the waste heat boiler, and water is directly supplemented to the waste heat boiler when the water quantity of the waste heat boiler is insufficient.
The town sewage is rich in organic matters, the cement is clarified after the town sewage is precipitated, the sewage and the precipitated sludge are effectively treated at the same place, the sludge rich in the organic matters is fermented to obtain the biogas, the biogas is used for power generation, the biogas residues are recycled as fertilizers, the heat exchange of the generator set is cooled by the treated purified water, the heat after the exchange is reasonably utilized, the system is compact in structure, and the waste of water resources and heat is avoided.
Further, purifier includes the filter, the filter adopts membrane filtration technique, for one or several kinds in micro-filtration membrane filtration technique, milipore filter filtration technique or the nanofiltration membrane filtration technique, should set up and can effectually purify sewage to can reach degerming effect.
The residue-liquid separation device comprises a centrifugal machine, the oil-water separation device comprises a centrifugal machine, the centrifugal machine utilizes the specific gravity of different substances to separate, and the oil-water separation device is further connected with a grease storage device and used for recycling grease.
In a specific embodiment, as shown in fig. 2, the power generation system for comprehensive utilization of town sewage includes a sedimentation tank 1, a water storage device 5, an anaerobic fermentation device 19, a biogas storage device 29, a filter 6, a softening device 7, a biogas power generation device 11, a cooling device 9, a waste heat boiler 10, and a screw expansion power generation device 14, wherein the upper part of the sedimentation tank 1 is communicated with the water storage device 5, the lower part of the sedimentation tank 1 is communicated with the anaerobic fermentation device 19, the sedimentation tank 1 can separate sewage from sludge, the sewage enters the water storage device 5 through the upper part of the sedimentation tank 1, and the sludge enters the anaerobic fermentation device 19 through the lower part of the sedimentation tank 1;
further, a first variable frequency pump 2 and a first centrifuge 3 are arranged between the sedimentation tank 1 and the water storage device 5, the inlet end of the first variable frequency pump 2 is communicated with the upper part of the sedimentation tank 1, the outlet end of the first variable frequency pump is communicated with the inlet end of the first centrifuge 3, the outlet end of the first centrifuge 3 is communicated with the water storage device 5 and is also communicated with a grease storage device 4, the first variable frequency pump 2 is used for pumping sewage and sending the sewage into the first centrifuge 3, the first centrifuge 3 is used for separating grease in the sewage and placing the sewage into the grease storage device 4 for collection, the separated sewage is input into the water storage device 5, a second slag slurry pump 20 is arranged between the sedimentation tank 1 and the anaerobic fermentation device 19, and the second slag slurry pump 20 pumps the sludge into the anaerobic fermentation device 19;
further, the water storage device 5 is communicated with the filter 6, the sewage is filtered by the filter 6 to form purified water, the filter 6 is communicated with the softening device 7 of the softening device 7, the purified water is softened by the softening device 7 of the softening device 7 to form soft water for temporary storage, and preferably, the filter 6 adopts a membrane filtration technology which is one or more of a micro-filtration membrane filtration technology, an ultrafiltration membrane filtration technology or a nanofiltration membrane filtration technology and is used for purifying and sterilizing the sewage;
furthermore, the softening device 7 is communicated with the cooling device 9, soft water is input into the cooling device 9 to cool the power generation device, so that sewage is reasonably utilized after being treated, the softening device 7 is also communicated with the waste heat boiler 10 to provide water for generating steam for the waste heat boiler 10, preferably, a second variable frequency pump 8 is arranged at the water outlet end of the softening device 7, the second variable frequency pump 8 is respectively communicated with the cooling device 9 and the waste heat boiler 10, a first control valve 21 is arranged between the second variable frequency pump 8 and the cooling device 9, a seventh control valve 27 is arranged between the second variable frequency pump 8 and the waste heat boiler 10, the first control valve 21 and the seventh control valve 27 are one-way electromagnetic valves, and the opening and closing of a pipeline are controlled to realize the one-way flow of the water;
preferably, as shown in fig. 3, the anaerobic fermentation tank 19 is cylindrical and comprises a peripheral hydrolysis chamber 191 and an internal fermentation chamber 192, the hydrolysis chamber 191 annularly encloses the outside of the fermentation chamber 192, a blocking wall between the hydrolysis chamber 191 and the fermentation chamber 192 is sealed, the bottoms of the hydrolysis chamber 191 and the fermentation chamber 192 are communicated through a connecting pipe 196, and the connecting pipe 196 is provided with a control valve for controlling the opening and closing of the pipeline; a sludge inlet 197 is formed in the outer side of the lower part of the hydrolysis chamber 191, the sludge inlet 197 is connected with the second slurry pump 20, a water inlet 199 and an exhaust inlet 194 are formed in the upper part of the hydrolysis chamber 191, the water inlet 199 is communicated with the water storage device 5, and the exhaust inlet 194 is connected with the screw expansion power generation device 14; the middle part of the hydrolysis chamber 191 is provided with at least one heater 198 for providing heat required by hydrolysis, the middle part of the fermentation chamber 192 is provided with a stirrer 190, the stirrer 190 penetrates through the top wall of the fermentation chamber 192 and is inserted into the fermentation chamber 192 and comprises a stirring motor and a stirring shaft, the stirring motor is arranged on the outer side of the top wall, the stirring shaft extends into the fermentation chamber 192, the stirring shaft is provided with a spiral blade, the stirrer 190 is favorable for the fermentation process, the bottom of the fermentation chamber 192 is provided with a slag-liquid outlet 195, the slag-liquid outlet 195 is communicated with a slag-liquid separating device, the upper part of the fermentation chamber 192 is also provided with a biogas outlet 193, and the biogas outlet 193 is communicated with the biogas storage device 29;
preferably, as shown in fig. 4, the biogas storage device 29 is cylindrical and includes an adsorption chamber 292 and an internal storage chamber 293, the adsorption chamber 292 annularly encloses the outside of the storage chamber 293, the adsorption chamber 292 is annularly provided with a plurality of adsorption layers 294, the adsorption layers 294 are filled with an adsorption material capable of adsorbing moisture and sulfur-containing substances in the biogas, the adsorption material is a dry adsorption material, for example, activated carbon or iron oxide, the plurality of adsorption layers 294 may be filled with different adsorption materials to absorb different substances, a biogas inlet 297 is arranged at the bottom outside the adsorption chamber 292, the biogas inlet 297 is communicated with the biogas outlet 193, a first partition 295 is arranged between the plurality of adsorption layers 294, a second partition 296 is arranged between the adsorption chamber 292 and the storage chamber 293, the first partition 295 and the second partition 296 are filter plates and can pass gas, a biogas conveying port 291 is arranged at the upper part of the storage chamber 293, and the biogas conveying port 291 is communicated with the biogas power generation device 11; the adsorption chamber 292 is arranged in a ring shape to increase the adsorption area, and is arranged at the periphery to facilitate the replacement of the adsorption material;
preferably, an eighth control valve 28 is arranged between the anaerobic fermentation device 19 and the biogas storage device 29, a tenth control valve 31 is arranged between the anaerobic fermentation device 19 and the water storage device 5, a ninth control valve 30 is arranged between the biogas storage device 29 and the biogas power generation device 11, and the eighth control valve 28, the ninth control valve 30 and the tenth control valve 31 are one-way solenoid valves which control the opening and closing of pipelines and control the unidirectional circulation of media in the pipelines; the bottom of the anaerobic fermentation device 19 is communicated with the inlet end of a second centrifugal machine 17, the outlet end of the second centrifugal machine 17 is respectively communicated with a biogas residue storage tank 16 and a sedimentation tank 1, a first slurry pump 18 is arranged between the anaerobic fermentation device 19 and the second centrifugal machine 17 and used for pumping a residue liquid, a third variable frequency pump 15 is arranged between the second centrifugal machine 17 and the sedimentation tank 1, the second centrifugal machine 17 is used for carrying out solid-liquid separation on the residue liquid after anaerobic fermentation, the liquid is pumped to the sedimentation tank 1 through the third variable frequency pump 15, and the solid is stored in the biogas residue storage tank 16 and is collected as a fertilizer;
the biogas power generation device 11 is communicated with the waste heat boiler 10, the flue gas with heat is conveyed to the waste heat boiler 10 for waste heat recovery, water is heated to generate steam, the waste heat boiler 10 discharges the flue gas after absorbing the heat, the waste heat boiler 10 is communicated with the screw expansion power generation device 14, and the generated steam is conveyed to the screw expansion power generation device 14 for power generation; the screw expansion power generation device 14 is communicated with the anaerobic fermentation device 19, and the generated exhaust gas is conveyed to the anaerobic fermentation device 19;
the biogas power generation device 11 is also connected with an induced draft fan 12, and the induced draft fan 12 is used for sucking outside air and mixing with biogas to contribute to biogas combustion for power generation;
furthermore, the cooling device 9 is respectively connected with the softening device 7, the methane power generation device 11, the exhaust-heat boiler 10 and the screw expansion power generation device 14, the cooling device 9 cools the soft water treated by the softening device 7 through the softening device 7 on the methane power generation device 11 and the screw expansion power generation device 14, and the cooled output soft water is conveyed to the exhaust-heat boiler 10 for generating steam.
Further, as shown in fig. 5, the cooling device 9 includes a tank, a water inlet 93, a water outlet 98, a first outlet 94, a second outlet 96, a first inlet 95 and a second inlet 97, the tank is externally provided with the water inlet 93, the water outlet 98, the first outlet 94, the second outlet 96, the first inlet 95 and the second inlet 97 which can be communicated with the outside, a closed accommodating cavity is formed inside the tank, the accommodating cavity includes a first accommodating cavity 91 and a second accommodating cavity 92, the first accommodating cavity 91 is partially provided with the water inlet 93, the first outlet 94 and the second outlet 96, the water inlet 93 is communicated with the softening device 7 of the softening device 7, the first outlet 94 is communicated with the biogas power generation device 11, the second outlet 96 is communicated with the screw expansion power generation device 14, the second accommodating cavity 92 is partially provided with the water outlet 98, the first inlet 95 and the second inlet 97, the water outlet 98 is communicated with the waste heat boiler 10, the first inlet 95 is communicated with the biogas power generation device 11, the second inlet 97 is communicated with the screw expansion power generation device 14, the first outlet 94, the second outlet 96, the first inlet 95 and the second inlet 97 are provided with the water pump 90, the middle of the first cavity 91 and the second cavity 92 is separated by a partition plate, the partition plate is closed and has a heat preservation effect, the first cavity 91 is used for temporarily storing water before cooling, the second cavity 92 is used for temporarily storing water after cooling, soft water in the first cavity 91 flows into a cooling pipeline of the biogas power generation device 11 from the first outlet 94 to cool the biogas power generation device, and enters the second cavity 92 for recycling through the first inlet 95 after cooling, and similarly, soft water in the first cavity 91 is discharged into a cooling pipeline of the screw expansion power generation device 14 from the second outlet 96 to cool the generator, and is discharged into the second cavity 92 from the second inlet 97 after cooling;
preferably, the second control valve 22 is arranged between the first outlet 94 and the biogas generating device 11, the third control valve 23 is arranged between the first inlet 95 and the biogas generating device 11, the fifth control valve 25 is arranged between the second outlet 96 and the screw expansion generating device 14, the sixth control valve 26 is arranged between the second inlet 97 and the screw expansion generating device 14, and the third control valve 23, the second control valve 22, the fifth control valve 25 and the sixth control valve 26 are one-way solenoid valves, so that the on-off of a water path is controlled and water flows in a one-way manner.
Specifically, the working principle of the power generation system for comprehensive utilization of town sewage is as follows:
discharging the town sewage from the A position into a sedimentation tank 1 for collection and sedimentation layering treatment;
the first variable frequency pump 2 and the first centrifugal machine 3 are started, sewage at the upper part of the sedimentation tank 1 enters a water storage device 5 through oil-water separation, separated grease enters a grease storage device 4 for collection, water in the water storage device 5 is filtered into purified water through a filter 6, a part of the purified water is output, and a part of the purified water enters a softening device 7 for softening treatment to obtain soft water;
the second slurry pump 20 is started, sludge at the lower part of the sedimentation tank 1 enters a hydrolysis chamber 191 of the anaerobic fermentation device 19 for hydrolysis, a tenth control valve 31 is started when water is insufficient during hydrolysis, water is supplemented by a water storage device 5, the hydrolyzed mixed slurry enters an internal fermentation chamber 192 for anaerobic fermentation, the fermented biogas is stored in a biogas storage device 29 through an opened eighth control valve 28 for power generation, the first slurry pump 18, the second centrifuge 17 and the third variable frequency pump 15 are started, the fermented slurry is pumped into the second centrifuge 17 for solid-liquid separation, the separated liquid is pumped into the sedimentation tank 1 through the third variable frequency pump 15 for recovery, and the solid is collected into a biogas residue storage tank 16 to serve as fertilizer;
the biogas enters an adsorption chamber 292 of a biogas storage device 29, enters a storage chamber 293 after being adsorbed and purified, a ninth control valve 30 is opened, the biogas is introduced into a biogas power generation device 11 for power generation, an induced draft fan 12 is opened, the required air enters the biogas power generation device 11 from a position B, a second variable frequency pump 8 is opened, a first control valve 21 is opened, a second control valve 22 and a third control valve 23 are opened, the soft water treated by a softening device 7 enters a cooling device 9 for cooling the biogas power generation device 11, the flue gas discharged by the biogas power generation device 11 enters a waste heat boiler 10 for heating, the flue gas after heat loss is discharged, a fourth control valve 24 is opened, meanwhile, water discharged by the cooling device 9 enters the waste heat boiler 10 to be heated to generate steam, and when the water amount in the waste heat boiler 10 is insufficient, the seventh control valve 27 is opened, and the soft water of the softening device 7 directly supplements the waste heat boiler 10;
steam of the waste heat boiler 10 enters the screw expansion power generation device 14 to generate power, the fifth control valve 25 and the sixth control valve 26 are opened, the cooling device 9 cools the screw expansion power generation device 14, and exhaust gas of the screw expansion power generation device 14 enters the anaerobic fermentation device 19 to assist anaerobic fermentation.
And the electric energy of the methane power generation device 11 and the screw expansion power generation device 14 is merged into a power grid at the position C to be output.
In the second embodiment, as shown in fig. 6, the cooling device 9 includes a tank, a water inlet 93, a water outlet 98, a first outlet 94, a second outlet 96, a first inlet 95 and a second inlet 97, the water inlet 93, the water outlet 98, the first outlet 94, the second outlet 96, the first inlet 95 and the second inlet 97 which can be communicated with the outside are disposed outside the tank, a closed accommodating cavity is formed inside the tank, the accommodating cavity includes a first accommodating cavity 91 and a second accommodating cavity 92, the water inlet 93 is disposed in a portion of the first accommodating cavity 91, the first outlet 94, the second outlet 96, the first inlet 95 and the second inlet 97 are disposed, the water inlet 93 is communicated with the softening device 7, the first outlet 94 is communicated with the biogas power generating device 11, the second outlet 96 is communicated with the screw expansion power generating device 14, the first inlet 95 is communicated with the biogas power generating device 11, the second inlet 97 is communicated with the screw expansion power generating device 14, the second cavity 92 is partially provided with a water outlet 98, the water outlet 98 is communicated with the waste heat boiler 10, a fan 99 is arranged on the first outlet 94, the second outlet 96, the first inlet 95 and the second inlet 97, the first cavity 91 and the second cavity 92 are vertically arranged, the middle is divided by a partition board, a plurality of water leakage ports are formed in the partition board, and water in the first cavity 91 can be led into the second cavity 92;
a cooling water pipe 931 is arranged in the water inlet 93 in an extending mode, a plurality of spray heads 932 are arranged on the cooling water pipe 931, a first air pipe 942 is arranged between the first outlet 94 and the first inlet 95, the first air pipe 942 is arranged in a bent and spiral mode, a plurality of fins 941 are arranged on the first air pipe 942 to increase the heat dissipation area, a second air pipe 961 is arranged between the second outlet 96 and the second inlet 97, the second air pipe 961 is arranged in a bent and spiral mode, and a plurality of fins 941 are arranged on the second air pipe 961 to increase the heat dissipation area; the first air pipe 942 extends from the first outlet 94 to the biogas power generation device 11 for air cooling, air in the first air pipe 942 enters the first cavity 91 through the first inlet 95 after absorbing heat, water flow is sprayed out through the spray head 932 on the cooling water pipe 931 to cool the first air pipe 942, and the cooled air in the first air pipe 942 enters the biogas power generation device 11 for air cooling through the first outlet 94 again; similarly, the second air duct 961 extends from the second outlet 96 to the screw expansion power generation device 14 for air cooling, the air enters the first cavity 91 through the second inlet 97 after absorbing heat, the water flow is sprayed out through the spray head 932 on the cooling water pipe 931 to cool the second air duct 961, and the air in the second air duct 961 enters the screw expansion power generation device 14 for air cooling through the second outlet 96 after cooling;
soft water sprayed by the air pipe from the first cavity 91 to reduce the temperature flows into the second cavity 92 from the partition plate to be recovered, and enters the waste heat boiler 10 through the water outlet 98;
preferably, the second control valve 22 is arranged between the first outlet 94 and the biogas generating device 11, the third control valve 23 is arranged between the first inlet 95 and the biogas generating device 11, the fifth control valve 25 is arranged between the second outlet 96 and the screw expansion generating device 14, the sixth control valve 26 is arranged between the second inlet 97 and the screw expansion generating device 14, and the third control valve 23, the second control valve 22, the fifth control valve 25 and the sixth control valve 26 are one-way solenoid valves, so that the on-off of a water path is controlled and water flows in a one-way manner.
The other settings of the power generation system for comprehensive utilization of town sewage are the same as those of the first embodiment.
Above-mentioned embodiment can make town sewage obtain comprehensive utilization, and sewage and the mud after the sewage deposit obtain effective processing in same place, and marsh gas after the processing generates electricity, natural pond sediment is retrieved as fertilizer, and the purified water after the processing cools off generating set heat exchange, and the heat after the exchange obtains rational utilization, and this system compact structure has avoided water resource and thermal waste for the resource obtains the rational utilization of maximize.
Although the invention has been described in detail with respect to the general description and the specific embodiments, it will be apparent to those skilled in the art that modifications and improvements can be made based on the invention. Therefore, such modifications and improvements are intended to be within the scope of the invention as claimed.
Claims (9)
1. A power generation system for comprehensive utilization of town sewage is characterized in that: including sedimentation tank, oil-water separator, water storage device, purifier, softening installation, anaerobic fermentation device, marsh gas storage device, sediment liquid separator, marsh gas power generation facility, cooling device, exhaust-heat boiler and screw expansion power generation facility:
the bottom of the sedimentation tank is communicated with the anaerobic fermentation device, the upper part of the sedimentation tank is sequentially communicated with the oil-water separation device, the water storage device, the purification device and the softening device, and town sewage is separated by the sedimentation tank to obtain sewage and sludge which respectively enter corresponding treatment devices for treatment;
the anaerobic fermentation device is communicated with a biogas storage device, a residue-liquid separation device and a water storage device, the anaerobic fermentation device comprises a peripheral hydrolysis chamber and an internal fermentation chamber, the hydrolysis chamber is annularly enclosed outside the fermentation chamber, the hydrolysis chamber is communicated with the bottom of the fermentation chamber, the hydrolysis chamber is also provided with a heating device, the fermentation chamber is communicated with the residue-liquid separation device at the bottom, and the upper part of the fermentation chamber is communicated with the biogas storage device;
the biogas storage device comprises an adsorption chamber and a storage chamber, the adsorption chamber is annularly enclosed outside the storage chamber, a plurality of adsorption layers are annularly arranged in the adsorption chamber, adsorption materials are filled in the adsorption layers, the bottom outside the adsorption chamber is communicated with the anaerobic fermentation device, the storage chamber is communicated with the interior of the adsorption chamber, and the upper part of the storage chamber is communicated with the biogas power generation device;
the methane power generation device is communicated with the methane storage device and the waste heat boiler, the stored methane is used for doing work to generate electric energy, and the flue gas with waste heat is discharged into the waste heat boiler to absorb the waste heat;
the cooling device is communicated with the softening device, the methane power generation device and the waste heat boiler, softened soft water is directly or indirectly used for unit cooling of the methane power generation device, the cooled water is introduced into the waste heat boiler to generate steam, the waste heat boiler is communicated with the screw expansion power generation device to apply work to generate electric energy, the cooling device comprises a water inlet, a water outlet, a first containing cavity and a second containing cavity, the first containing cavity is communicated with the water inlet, the second containing cavity is communicated with the water outlet, the soft water before cooling is introduced into the first containing cavity from the water inlet, the cooled soft water is discharged from the second containing cavity through the water outlet, the water inlet is communicated with the softening device, and the water outlet is communicated with the waste heat boiler;
the screw expansion power generation device is also communicated with the cooling device and the anaerobic fermentation device, the cooling device is used for directly or indirectly cooling the unit, and exhaust after acting is introduced into the anaerobic fermentation device;
the slag-liquid separation device is also communicated with the sedimentation tank, liquid obtained after solid-liquid separation of slag-liquid is introduced into the sedimentation tank, and solid is collected as fertilizer;
the softening device is also directly communicated with the waste heat boiler, and water is directly supplemented to the waste heat boiler when the water quantity of the waste heat boiler is insufficient.
2. The town sewage comprehensive utilization power generation system according to claim 1, characterized in that: a sludge inlet is formed in the outer side of the lower part of the hydrolysis chamber and is connected with the sedimentation tank, a water inlet and an exhaust inlet are formed in the upper part of the hydrolysis chamber, the water inlet is communicated with a water storage device, and the exhaust inlet is connected with a screw expansion power generation device; the middle part of the hydrolysis chamber is provided with at least one heater, the middle part of the fermentation chamber is provided with a stirrer, the stirrer penetrates through the top wall of the fermentation chamber to be inserted, the bottom of the fermentation chamber is provided with a slag-liquid outlet, the slag-liquid outlet is communicated with the slag-liquid separation device, the upper part of the fermentation chamber is also provided with a methane outlet, and the methane outlet is communicated with the methane storage device.
3. The town sewage comprehensive utilization power generation system according to claim 2, characterized in that: the biogas inlet is formed in the bottom outside the adsorption chamber and communicated with the biogas outlet, a first partition plate is arranged among the adsorption layers, a second partition plate is arranged between the adsorption chamber and the storage chamber and is a filter plate capable of allowing gas to pass through, a biogas conveying port is formed in the upper portion of the storage chamber and communicated with the biogas power generation device.
4. The town sewage comprehensive utilization power generation system according to claim 1, characterized in that: the cooling device comprises a first inlet, a second inlet, a first outlet and a second outlet, and the first inlet and the first outlet are communicated with the biogas power generation device and are used for inputting or outputting a medium cooled by the biogas power generation device; the second inlet and the second outlet are communicated with the screw expansion power generation device and are used for inputting or outputting a medium for cooling the screw expansion power generation device.
5. The town sewage comprehensive utilization power generation system according to claim 4, characterized in that: first entry, second entry, first export and second export all communicate the first appearance chamber, be provided with first tuber pipe between first entry and the first export, first tuber pipe crooked dish sets up soon, be provided with the second tuber pipe between second entry and the second export, second tuber pipe crooked dish sets up soon, first tuber pipe and second tuber pipe set up at first appearance intracavity, are cooled down by the soft water that gets into first appearance chamber to it.
6. The town sewage comprehensive utilization power generation system according to claim 5, characterized in that: the water inlet is internally provided with a cooling water pipe in an extending mode, and the cooling water pipe is provided with a plurality of spray heads.
7. The town sewage comprehensive utilization power generation system according to claim 5, characterized in that: and a plurality of fins are arranged on the first air pipe and the second air pipe.
8. The town sewage comprehensive utilization power generation system according to claim 4, characterized in that: the first inlet and the second inlet are communicated with the second containing cavity, the first outlet and the second outlet are communicated with the first containing cavity, soft water entering the first containing cavity flows out through the first outlet and the second outlet to cool the corresponding power generation device, and the cooled soft water flows into the second containing cavity through the first inlet and the second inlet.
9. The town sewage comprehensive utilization power generation system according to claim 1, characterized in that: the purification device comprises a filter, wherein the filter adopts a membrane filtration technology, and is one or more of a microfiltration membrane filtration technology, an ultrafiltration membrane filtration technology or a nanofiltration membrane filtration technology.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113860618A (en) * | 2021-11-10 | 2021-12-31 | 山西省工业设备安装集团有限公司 | Villages and small towns sewage concentrates innocent treatment system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113860618A (en) * | 2021-11-10 | 2021-12-31 | 山西省工业设备安装集团有限公司 | Villages and small towns sewage concentrates innocent treatment system |
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Address after: 030032 No. 8, Xinhua Road, Taiyuan Tanghuai Industrial Park, Shanxi transformation and comprehensive reform demonstration zone, Taiyuan City, Shanxi Province Patentee after: Shanxi Installation Group Co.,Ltd. Address before: 030032 No.8, Xinhua Road, Shanxi demonstration area, Taiyuan City, Shanxi Province Patentee before: SHANXI INDUSTRIAL EQUIPMENT INSTALLATION GROUP Co.,Ltd. |