CN215209019U - Biogas slurry treatment device for kitchen and kitchen waste - Google Patents
Biogas slurry treatment device for kitchen and kitchen waste Download PDFInfo
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- CN215209019U CN215209019U CN202121315331.6U CN202121315331U CN215209019U CN 215209019 U CN215209019 U CN 215209019U CN 202121315331 U CN202121315331 U CN 202121315331U CN 215209019 U CN215209019 U CN 215209019U
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Abstract
The application discloses kitchen and kitchen garbage's natural pond liquid processing apparatus, including preliminary treatment module, ammonia separation module, separation module and re-separation module. The pretreatment module comprises a dehydrator and a sedimentation tank, a liquid outlet of the dehydrator is communicated with the sedimentation tank through a first pipeline, and the bottom of the sedimentation tank is also communicated with an inlet of the dehydrator through a second pipeline; the ammonia separation module comprises an ammonia separation device, and the ammonia separation device is communicated with an outlet of the sedimentation tank; the separation module comprises an A/O device and an MBR device, the inlet of the A/O device is communicated with the ammonia separation device, and the outlet of the A/O device is communicated with the inlet of the MBR device; the secondary separation module comprises a nanofiltration device, a nanofiltration clear water tank and a reverse osmosis device, wherein an inlet of the nanofiltration device is communicated with an outlet of the MBR device, an outlet of the nanofiltration device is communicated with the nanofiltration clear water tank, and the reverse osmosis device is communicated with the nanofiltration clear water tank, so that the cleaning effect on the biogas slurry can be improved.
Description
Technical Field
The application belongs to the biogas slurry treatment field, and particularly provides a biogas slurry treatment device for kitchen and kitchen waste.
Background
With the development of social economy, more and more kitchen wastes are produced, whether the kitchen wastes can be properly treated or not can be directly related to food sanitation and safety and the health of people, after the kitchen wastes are treated by anaerobic fermentation, a large amount of biogas is produced, the biogas is a clean energy and can be used for burning power generation, but a large amount of biogas slurry is produced in the anaerobic fermentation process, the kitchen waste biogas slurry is waste water with high-concentration organic matters or inorganic matters produced after the kitchen wastes are subjected to anaerobic fermentation, the waste water contains solid organic matters, metal ions and the like, and the biogas slurry is waste water with special properties and cannot be directly discharged into the natural environment, so the biogas slurry can be discharged after being treated. Because the biogas slurry of the kitchen and kitchen garbage has large water quality change range, multiple types of organic pollutants, high concentration and more metal ions, the difficulty of treating the kitchen and kitchen garbage is very high.
SUMMERY OF THE UTILITY MODEL
In order to better reduce the content of organic matters and metal ions in the biogas slurry and improve the water quality of the biogas slurry after biogas slurry treatment, the application provides a biogas slurry treatment device for kitchen and kitchen waste.
A biogas slurry treatment device for kitchen and kitchen garbage comprises a pretreatment module, an ammonia separation module, a separation module and a re-separation module. The pretreatment module comprises a dehydrator and a sedimentation tank, a liquid outlet of the dehydrator is communicated with the sedimentation tank through a first pipeline, and the bottom of the sedimentation tank is also communicated with an inlet of the dehydrator through a second pipeline; the ammonia separation module comprises an ammonia separation device, and the ammonia separation device is communicated with an outlet of the sedimentation tank; the separation module comprises an A/O device and an MBR device, the inlet of the A/O device is communicated with the ammonia separation device, and the outlet of the A/O device is communicated with the inlet of the MBR device; the secondary separation module comprises a nanofiltration device, a nanofiltration clear water tank and a reverse osmosis device, wherein an inlet of the nanofiltration device is communicated with an outlet of the MBR device, a clear water outlet of the nanofiltration device is communicated with the nanofiltration clear water tank, and the reverse osmosis device is communicated with the nanofiltration clear water tank.
In an embodiment of the application, the dehydrator is a stacked screw sludge dehydrator, the stacked screw sludge dehydrator is provided with a chemical inlet communicated with a cavity where the helical blade is located, the pretreatment module further comprises a chemical dosing device, and a chemical outlet of the chemical dosing device is communicated with the chemical inlet.
In one embodiment of the present application, the MBR unit is in communication with the inlet of the dewatering machine via a sludge pump.
In an embodiment of this application, separation module still includes cooling unit and with the heat exchanger of cooling unit intercommunication, the AO device passes through cooling pump and heat exchanger intercommunication, the cooling unit can be through the natural pond liquid cooling of heat exchanger in to the AO device.
In one embodiment of the present application, the ammonia separation module further comprises an ammonia absorption column in communication with the ammonia separation device.
In one embodiment of the present application, the re-separation module is further provided with a nanofiltration concentrate tank, and a concentrate outlet of the nanofiltration device is communicated with the ammonia absorption tower through the nanofiltration concentrate tank.
In an embodiment of the present application, the ammonia separation device includes a first negative pressure stripping tower and a second negative pressure stripping tower, an inlet of the first negative pressure stripping tower is communicated with an outlet of the sedimentation tank, an outlet of the first negative pressure stripping tower is communicated with an inlet of the second negative pressure stripping tower, and an inlet of the a/O device is communicated with an outlet of the second negative pressure stripping tower.
In one embodiment of the present application, the re-separation device further comprises a reverse osmosis clean water tank, the reverse osmosis clean water tank being in communication with the clean water outlet of the reverse osmosis device.
In one embodiment of the present application, the re-separation device further comprises a reverse osmosis concentrate tank in communication with the concentrate outlet of the reverse osmosis device.
In one embodiment of the present application, the re-separation device further comprises a high pressure reverse osmosis device in communication with the reverse osmosis concentrate tank.
As can be understood by those skilled in the art, the biogas slurry treatment device for kitchen and kitchen waste has at least the following beneficial effects:
1. through the mode of the liquid outlet of hydroextractor through first pipeline and sedimentation tank intercommunication, the hydroextractor can be with great solids such as residue in the natural pond liquid from the natural pond liquid separation, and natural pond liquid after the separation gets into the sedimentation tank, because the natural pond liquid that separates through the hydroextractor still contains partial solid residue, through adding the sediment of the solid in the specific medicine acceleration natural pond liquid to the sedimentation tank to can reduce the solid residue in the natural pond liquid. The solid residue is deposited in the bottom of the sedimentation tank due to the gravity, the upper layer of the sedimentation tank is biogas slurry, solid-liquid layering is realized, and the solid residue deposited in the sedimentation tank can enter the dehydrator through the second pipeline to be subjected to solid-liquid separation again in a mode that the bottom of the sedimentation tank is communicated with the inlet of the dehydrator through the second pipeline, so that the impurity removal effect of the pretreatment module is improved, and the pollution and the consumption of water resources are reduced.
2. Through the cooling unit that sets up and the heat exchanger with cooling unit intercommunication, the heat exchanger passes through cooling pump and AO device intercommunication, and natural pond liquid in the AO device can get into the heat exchanger and cool down to avoid the fungus crowd such as denitrifying bacteria in the AO device to influence reaction rate because of the high temperature.
3. This application is through inside first negative pressure strip tower and the second negative pressure strip tower that can the negative pressure, separates twice to make the gas that contains ammonia, nitrogen element separate from natural pond liquid, thereby can reduce ammonia, nitrogen element content in the natural pond liquid, reduce the working strength of AO device and MBR device, improve the life of AO device and MBR device.
Drawings
Embodiments of the present application are described below with reference to the accompanying drawings, in which:
FIG. 1 is a schematic structural view of an exemplary embodiment of the present application;
fig. 2 is a schematic view of an exemplary embodiment of an administration set according to the present application.
In the figure:
101-a dehydrator; 102-a sedimentation tank; 103-a first conduit; 104-a second conduit; 105-a drug delivery device; 106-helical blades;
201-a first negative pressure stripper; 202-a second negative pressure stripper; 203-ammonia absorption column;
301-A/O devices; 302-MBR means; 303-a cooling unit; 304-a heat exchanger;
401-a nanofiltration device; 402-a nanofiltration clear water tank; 403-nanofiltration concentrated water tank; 404-a reverse osmosis unit; 405-a reverse osmosis clear water tank; 406-a reverse osmosis concentrate tank; 407-high pressure reverse osmosis device.
Detailed Description
In order to more clearly understand the technical features, objects, and effects of the present application, embodiments of the present application will now be described with reference to the accompanying drawings, in which like reference numerals refer to components that are identical in structure or similar in structure but identical in function.
"exemplary" means "serving as an example, instance, or illustration" herein, and any illustration, embodiment, or steps described as "exemplary" herein should not be construed as a preferred or advantageous alternative.
For the sake of simplicity, the drawings only schematically show the parts relevant to the present application, and they do not represent the actual structure of the product.
Referring to fig. 1 and 2, the biogas slurry treatment device for kitchen and kitchen waste comprises a pretreatment module, an ammonia separation module, a separation module and a re-separation module. The pretreatment module comprises a dehydrator 101 and a sedimentation tank 102, the dehydrator 101 is a stacked screw type sludge dehydrator, and of course, a person skilled in the art can understand that the dehydrator 101 in the present application can also be other types of dehydrators, a liquid outlet of the dehydrator 101 is communicated with the sedimentation tank 102 through a first pipeline 103, and a bottom of the sedimentation tank 102 is also communicated with an inlet of the dehydrator 101 through a second pipeline 104; the stacked spiral sludge dewatering machine 101 is provided with a medicine inlet communicated with a cavity where the spiral blades 106 are located, the pretreatment module further comprises a medicine feeding device 105, and a medicine outlet of the medicine feeding device 105 is communicated with the medicine inlet, so that when the stacked spiral sludge dewatering machine 101 treats untreated biogas slurry, medicines can be added to separate some organic matters or metal ions from the biogas slurry, the organic matters or the metal ions are separated from the biogas slurry through the separation effect of the dewatering machine 101, and the removal effect of the dewatering machine 101 is improved.
Untreated biogas slurry can enter the dehydrator 101 through the inlet of the dehydrator 101, so that most of solid matters in the biogas slurry can be separated from liquid by the dehydrator 101, and the separated residue is compostable because most of organic matters such as vegetables are contained in the separated residue. The separated liquid enters the sedimentation tank 102 through the liquid outlet of the dehydrator 101, solid residues still exist in the separated biogas slurry, the solid residues are deposited at the bottom of the sedimentation tank 102 due to the gravity, the solid residues in the biogas slurry in the upper layer of the sedimentation tank 102 are reduced, solid-liquid layering is realized, in addition, the mode that the bottom of the sedimentation tank 102 is communicated with the inlet of the dehydrator 101 through the second pipeline 104 is adopted, the deposited solid residues in the sedimentation tank 102 can enter the dehydrator 101 through the second pipeline 104 through the pumping action of the pump for solid-liquid separation again, and therefore the impurity removal effect of the pretreatment module is improved.
Referring to fig. 1, the ammonia separation module includes an ammonia separation device, the ammonia separation device communicates with the outlet of the sedimentation tank 102, in an embodiment of the present application, the ammonia separation device includes a first negative pressure stripping tower 201 and a second negative pressure stripping tower 202, a negative pressure can be formed in the internal cavity of the negative pressure stripping tower, so that the gas containing sulfur, nitrogen and other elements can be separated out from the biogas slurry by utilizing the phase equilibrium of the gas and the liquid, the steam in the negative pressure stripping tower contacts with the ammonia separated from the biogas slurry and absorbs the ammonia, thereby the ammonia is separated from the biogas slurry, the nitrogen content in the biogas slurry is reduced, and no alkali liquor is required to be added in the process, and the salt concentration of the biogas slurry is not increased. The tower plate in the negative pressure stripping tower can use a self-cleaning tower plate, so that fatty acid, organic matters and the like in the biogas slurry are prevented from blocking the tower plate. The inlet of the first negative pressure stripping tower 201 is communicated with the outlet of the sedimentation tank 102, and the outlet of the first negative pressure stripping tower 201 is communicated with the inlet of the second negative pressure stripping tower 202. The biogas slurry after the precipitation enters the first negative pressure stripping tower 201 through the outlet of the precipitation tank 102 to separate primary ammonia from the biogas slurry, and then enters the second negative pressure stripping tower 202 to separate ammonia from the biogas slurry again, so that the ammonia content in the biogas slurry is reduced. In an embodiment of this application, the ammonia separation module still includes ammonia absorption tower 203, ammonia absorption tower 203 respectively with first negative pressure stripping tower 201 and second negative pressure stripping tower 202 intercommunication to the steam that contains ammonia that is located the natural pond liquid top converts stronger aqueous ammonia into after cooling device cools off, stronger aqueous ammonia and carbon dioxide carry out the carbonization reaction in ammonia absorption tower 203, thereby obtain ammonium bicarbonate and other liquid that contain ammonia, the saving and the utilization of the ammonia of being convenient for.
Referring to fig. 1, the separation module comprises an a/O device 301 and an MBR device 302, an inlet of the a/O device 301 is communicated with an outlet of the second negative pressure stripping tower 202, an outlet of the a/O device 301 is communicated with an inlet of the MBR device, organic matters in biogas slurry can be effectively removed through the arranged a/O device 301, and meanwhile, a certain denitrification and dephosphorization function is provided, so that the situation that nitrogen and phosphorus elements exceed standards and the discharged biogas slurry causes eutrophication of other water bodies can be avoided, and the environment pollution is avoided. Can effectual reduction suspended solid in the natural pond liquid through the MBR device that sets up to further improve the clean effect to natural pond liquid.
The outlet of the second negative pressure stripping tower 202 is communicated with the inlet of the A/O device 301, a buffer device is further arranged, a buffer cavity is arranged in the buffer device, and fluctuation of water quality and water quantity caused by discontinuous operation or non-constant treatment capacity of the dehydrator 101 can be relieved by the buffer cavity, so that influence of the fluctuation of the water quality and the water quantity on the working process of the A/O device 301 is reduced.
Referring to fig. 1, further, in an embodiment of the present application, the separation module further includes a temperature reduction unit 303 and a heat exchanger 304 communicated with the temperature reduction unit 303, the a/O device 301 is communicated with the heat exchanger 304 through a temperature reduction pump, and the temperature reduction unit 303 can reduce the temperature of the biogas slurry in the a/O device 301 through the heat exchanger 304, so as to avoid that flora such as denitrifying bacteria in the a/O device 301 affect the reaction rate due to an excessively high temperature, and avoid affecting the removal efficiency of organic matters in the biogas slurry by the a/O device 301.
Referring to fig. 1, in an embodiment of this application, MBR device 302 passes through the import intercommunication of sludge pump and hydroextractor 101 to the sludge pump can carry out solid-liquid separation to the hydroextractor 101 with the suspended solid pump that MBR device 302 filters out, when avoiding extravagant, can also avoid the precipitate in the MBR device too much, influences the clean effect of MBR device 302 to natural pond liquid.
Referring to fig. 1, the re-separation module includes a nano-filtration device 401, a nano-filtration clear water tank 402 and a reverse osmosis device 404, an inlet of the nano-filtration device 401 is communicated with an outlet of the MBR device 302, a clear water outlet of the nano-filtration device 401 is communicated with the nano-filtration clear water tank 402, and the reverse osmosis device 404 is communicated with the nano-filtration clear water tank 402.
Biochemically degradable substances in the biogas slurry treated by the A/O device 301 and the MBR device 302 are basically removed, and the rest substances are mainly refractory organic matters and cannot be treated by a common biochemical method. The nanofiltration device 401 separates the refractory organic substances by a membrane separation technique, which mainly utilizes the selective permeability of the membrane to the substances, i.e., clear water and small molecular substances are allowed to permeate through the membrane, and large molecular substances and particle substances are all trapped. The membrane separation technology can effectively intercept and concentrate pollutants in water to obtain cleaner product water, and the cleaner product water enters the nanofiltration clear water tank 402.
Referring to fig. 1, in one embodiment of the present application, the re-separation module is further provided with a nanofiltration concentrated water tank 403, and a concentrated water outlet of the nanofiltration device 401 is communicated with the ammonia absorption tower 203 through the nanofiltration concentrated water tank 403, so that the absorption liquid containing ammonia generated in the separation process by the nanofiltration device 401 can be conveyed to the ammonia absorption tower 203 to be changed into ammonium bicarbonate or ammonia water, or other substances containing ammonia, so as to facilitate the collection of ammonia.
The reverse osmosis device 404 sucks water in the nanofiltration clean water tank 402 by a pump, so that the water in the nanofiltration clean water tank 402 is further treated by the reverse osmosis device 404 of a reverse osmosis method (also called an ultrafiltration method), thereby achieving the discharge standard. The reverse osmosis clear water tank 405 is communicated with a clear water outlet of the reverse osmosis device 404, and the treated cleaner product water can enter the reverse osmosis clear water tank 405 through the clear water outlet.
Referring to fig. 1, in one embodiment of the present application, the re-separation device further includes a reverse osmosis concentrate tank 406, the reverse osmosis concentrate tank 406 is communicated with a concentrate outlet of the reverse osmosis device 404, a concentrate produced by the reverse osmosis device 404 contains metal ions and other substances difficult to separate, and the concentrate is difficult to be further separated by the reverse osmosis device 404, so that the concentrate is stored in the reverse osmosis concentrate tank 406.
Referring to fig. 1, in one embodiment of the present application, the re-separation device further includes a high pressure reverse osmosis device 407, the high pressure reverse osmosis device 407 is communicated with the reverse osmosis concentrated water tank 406, and the concentrated water is further treated by using the high pressure of the high pressure reverse osmosis device 407 to reduce the moisture in the concentrated water, thereby saving water resources.
It should be understood that although the present description has been described in terms of various embodiments, not every embodiment includes only a single embodiment, and such description is for clarity purposes only, and those skilled in the art will recognize that the embodiments described herein can be combined as a whole to form other embodiments as would be understood by those skilled in the art.
The above list of details is only for the concrete description of the feasible embodiments of the present application and they are not intended to limit the scope of the present application, and all equivalent embodiments or modifications, such as combinations, divisions or repetitions of features, which do not depart from the technical spirit of the present application, should be included in the scope of the present application.
Claims (10)
1. A biogas slurry treatment device for kitchen and kitchen garbage is characterized by comprising,
the pretreatment module comprises a dehydrator and a sedimentation tank, wherein a liquid outlet of the dehydrator is communicated with the sedimentation tank through a first pipeline, and the bottom of the sedimentation tank is also communicated with an inlet of the dehydrator through a second pipeline;
the ammonia separation module comprises an ammonia separation device, and the ammonia separation device is communicated with an outlet of the sedimentation tank;
the separation module comprises an A/O device and an MBR device, wherein the inlet of the A/O device is communicated with the ammonia separation device, and the outlet of the A/O device is communicated with the inlet of the MBR device;
the device comprises a re-separation module, wherein the re-separation module comprises a nano-filtration device, a nano-filtration clear water tank and a reverse osmosis device, an inlet of the nano-filtration device is communicated with an outlet of an MBR device, a clear water outlet of the nano-filtration device is communicated with the nano-filtration clear water tank, and the reverse osmosis device is communicated with the nano-filtration clear water tank.
2. The biogas slurry treatment apparatus for kitchen and kitchen waste according to claim 1,
the dehydrator is a stacked screw type sludge dehydrator, the stacked screw type sludge dehydrator is provided with a medicine inlet communicated with a cavity where the helical blades are located, the pretreatment module further comprises a medicine feeding device, and a medicine outlet of the medicine feeding device is communicated with the medicine inlet.
3. The biogas slurry treatment apparatus for kitchen and kitchen waste according to claim 1,
the MBR device is communicated with the inlet of the dehydrator through a sludge pump.
4. The biogas slurry treatment apparatus for kitchen and kitchen waste according to claim 1,
the separation module still include the cooling unit and with the heat exchanger of cooling unit intercommunication, the AO device through the cooling pump with the heat exchanger intercommunication, the cooling unit can be through the heat exchanger cooling to the natural pond liquid in the AO device.
5. The biogas slurry treatment apparatus for kitchen and kitchen waste according to claim 1,
the ammonia separation module further comprises an ammonia absorption tower, and the ammonia absorption tower is communicated with the ammonia separation device.
6. The biogas slurry treatment apparatus for kitchen and kitchen waste according to claim 5,
the re-separation module is also provided with a nanofiltration concentrated water tank, and a concentrated water outlet of the nanofiltration device is communicated with the ammonia absorption tower through the nanofiltration concentrated water tank.
7. The biogas slurry treatment apparatus for kitchen and kitchen waste according to claim 1,
the ammonia separation device comprises a first negative pressure stripping tower and a second negative pressure stripping tower, the inlet of the first negative pressure stripping tower is communicated with the outlet of the sedimentation tank, the outlet of the first negative pressure stripping tower is communicated with the inlet of the second negative pressure stripping tower, and the inlet of the A/O device is communicated with the outlet of the second negative pressure stripping tower.
8. The biogas slurry treatment apparatus for kitchen and kitchen waste according to claim 1,
the re-separation module also comprises a reverse osmosis clear water tank which is communicated with a clear water outlet of the reverse osmosis device.
9. The biogas slurry treatment apparatus for kitchen and kitchen waste according to claim 1,
the re-separation module also comprises a reverse osmosis concentrated water tank which is communicated with a concentrated water outlet of the reverse osmosis device.
10. The biogas slurry treatment apparatus for kitchen and kitchen waste according to claim 9,
the re-separation module also comprises a high-pressure reverse osmosis device which is communicated with the reverse osmosis concentrated water tank.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121315331.6U CN215209019U (en) | 2021-06-11 | 2021-06-11 | Biogas slurry treatment device for kitchen and kitchen waste |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121315331.6U CN215209019U (en) | 2021-06-11 | 2021-06-11 | Biogas slurry treatment device for kitchen and kitchen waste |
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| Publication Number | Publication Date |
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| CN215209019U true CN215209019U (en) | 2021-12-17 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202121315331.6U Active CN215209019U (en) | 2021-06-11 | 2021-06-11 | Biogas slurry treatment device for kitchen and kitchen waste |
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- 2021-06-11 CN CN202121315331.6U patent/CN215209019U/en active Active
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