CN114101299A - Distributed biochemical treatment system for kitchen waste - Google Patents
Distributed biochemical treatment system for kitchen waste Download PDFInfo
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- CN114101299A CN114101299A CN202010870923.8A CN202010870923A CN114101299A CN 114101299 A CN114101299 A CN 114101299A CN 202010870923 A CN202010870923 A CN 202010870923A CN 114101299 A CN114101299 A CN 114101299A
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Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09B—DISPOSAL OF SOLID WASTE NOT OTHERWISE PROVIDED FOR
- B09B3/00—Destroying solid waste or transforming solid waste into something useful or harmless
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09B—DISPOSAL OF SOLID WASTE NOT OTHERWISE PROVIDED FOR
- B09B5/00—Operations not covered by a single other subclass or by a single other group in this subclass
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/20—Waste processing or separation
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- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Processing Of Solid Wastes (AREA)
Abstract
The invention belongs to the technical field of kitchen waste treatment, and discloses a distributed kitchen waste biochemical treatment system. This distributing type kitchen garbage biochemical treatment system includes the refuse treatment system, and the refuse treatment system is including consecutive rubbish temporary storage device, dry dewatering device and biochemical fermenting installation, and dry dewatering device sets to can carry out dry dehydration to the default through the vapor recompression technique to kitchen garbage. Wherein, distributing type kitchen garbage biochemical treatment system is still including the condensate water pipeline that communicates dry dewatering device, biochemical fermentation device and rubbish temporary storage device in proper order to make the condensate water that produces in the dry dewatering device discharge again behind biochemical fermentation device and the rubbish temporary storage device in proper order, with the waste heat recovery who realizes the condensate water. The distributed biochemical treatment system for the kitchen waste can meet the requirement of the kitchen waste on the condition suitable for biochemical treatment during biochemical treatment, and can effectively reduce the energy consumption of the system and save energy.
Description
Technical Field
The invention belongs to the technical field of kitchen waste treatment, and particularly relates to a distributed kitchen waste biochemical treatment system.
Background
The kitchen waste is complex in components, mainly contains organic substances such as starch, dietary fiber and animal fat, is high in water content, is easy to decay and generates offensive odor, and therefore is difficult to treat. According to the characteristics of the kitchen waste, the necessary pretreatment and then biodegradation treatment (i.e. biochemical treatment) are good treatment modes, the biochemical treatment has two modes of aerobic fermentation and anaerobic fermentation, the aerobic fermentation can generally produce organic fertilizer, and the anaerobic fermentation can generally produce methane. For centralized large-scale kitchen waste treatment, anaerobic fermentation is adopted, and the generated biogas can be further recycled. Because the sources of the kitchen waste are dispersed, higher transportation cost is inevitably brought to centralized treatment, and secondary spilling in the transportation process is caused, so that distributed on-site treatment is a better choice sometimes. Distributed processing generally arranges processing stations near the source of kitchen waste and is located in areas with dense personnel, so that waste processing efficiency is high, energy consumption is low, and safety and reliability are required; secondly, the floor area is required to be small, and no secondary pollution is caused; thirdly, as the operators of the common stations are few, the treatment process is simple in process and convenient to operate. Because the traditional biochemical treatment mode has the problems of long treatment time, complex process and the like no matter anaerobic treatment or aerobic treatment, and the anaerobic treatment mode can also generate flammable and explosive biogas with higher danger, the traditional biochemical treatment mode is not suitable for the treatment of distributed kitchen waste.
At present, the conventional aerobic biochemical treatment is carried out in equipment, the equipment is provided with mechanical stirring and forced heating and ventilation, and the equipment has the greatest characteristic of high treatment speed (generally, the retention time is 1-3 days), and the equipment occupies a small area due to short retention time. For a slightly large-scale device (such as the treatment capacity is more than 2 tons/day), the process generally comprises the steps of crushing, then mechanically extruding and dehydrating, feeding the dehydrated materials into a biochemical bin for aerobic biochemical treatment, and feeding the sewage into a water treatment system.
However, in the biochemical treatment of the kitchen waste in the prior art, because the kitchen waste has complex components, the moisture content of the mechanically dehydrated material can still reach 65-70% generally, and the moisture content suitable for the aerobic treatment is 50-60%, the mechanically dehydrated material is easy to form an anaerobic environment in biochemical equipment, and the aerobic degradation difficulty is high, so that the condition requirement suitable for the biochemical treatment cannot be met. And as the biochemical treatment time is short (generally less than 72 hours), the water content in the kitchen waste cannot be effectively reduced, and simultaneously viruses, pathogenic bacteria and pathogenic microorganisms which may be generated during the storage period of the kitchen waste cannot be well killed, so that harmful substances still exist after the kitchen waste is treated. In addition, the steam of material after the dehydration is usually directly discharged to exhaust-gas treatment system to waste the waste heat in the steam, caused the waste of usable energy.
Disclosure of Invention
In order to solve all or part of the problems, the invention aims to provide a distributed biochemical treatment system for kitchen waste, so that the kitchen waste can meet the requirements of conditions suitable for biochemical treatment during biochemical treatment, and meanwhile, the energy consumption of the system can be effectively reduced, and the energy is saved.
This distributing type kitchen garbage biochemical treatment system is including being used for carrying out the refuse treatment system of preliminary treatment and aerobic fermentation to kitchen garbage, the refuse treatment system is including consecutive rubbish temporary storage device, dry dewatering device and biochemical fermenting installation, rubbish temporary storage device is used for keeping in kitchen garbage, dry dewatering device sets to can carry out dry dehydration to the default through steam recompression technique to kitchen garbage, biochemical fermenting installation is used for carrying out aerobic biochemical fermentation with kitchen garbage and discharges to outside. Wherein, distributing type kitchen garbage biochemical treatment system is still including the condensate water pipeline that communicates dry dewatering device, biochemical fermentation device and rubbish temporary storage device in proper order to make the condensate water that produces in the dry dewatering device discharge again behind biochemical fermentation device and the rubbish temporary storage device in proper order, with the waste heat recovery who realizes the condensate water.
Further, dry dewatering device includes vacuum dryer, vacuum dryer is including the sealed casing that has steam jacket, first vapour and liquid separator and vapor compressor, be formed with the feed inlet on the sealed casing, the discharge gate, desicator comdenstion water backward flow mouth and steam outlet, be formed with steam inlet and desicator comdenstion water export on the steam jacket, wherein, steam outlet, the gas inlet of first vapour and liquid separator, vapor compressor and steam inlet link to each other in proper order, the liquid outlet of first vapour and liquid separator links to each other with desicator comdenstion water backward flow mouth, desicator comdenstion water export links to each other through condensate water pipeline and biochemical fermentation device's comdenstion water entry.
Furthermore, the drying and dehydrating device also comprises a second gas-liquid separator and a condensate pump, wherein a dryer condensate outlet, the second gas-liquid separator and the condensate pump are sequentially communicated and are communicated with a condensate inlet of the biochemical fermentation device through a condensate pipeline.
Further, biochemical fermentation device includes biochemical storehouse and waste heat recovery device, biochemical storehouse is including the storehouse body, the air-supply line, the blast pipe, waste heat recovery device includes that the evaporimeter trades the hot side and the condenser trades the hot side and links to each other, the blast pipe trades the hot side with the condenser and links to each other, the lower part of the storehouse body is the arc, the arc part of the storehouse body is equipped with the condensate water jacket, the condensate water presss from both sides and is equipped with biochemical storehouse comdenstion water entry and biochemical storehouse comdenstion water export on the jacket, wherein, biochemical storehouse comdenstion water entry passes through the condensate water pipeline and links to each other with dry dewatering device's condensate water pump, in order to receive the comdenstion water that comes from in the dry dewatering device.
Further, the biochemical fermentation device further comprises a gas collection box assembly and a fine filtering device which are arranged outside the wall plate of the bin body, wherein the wall plate is provided with an exhaust hole communicated with the gas collection box assembly, an exhaust pipe is formed on the gas collection box assembly and is connected with the fine filtering device so as to discharge waste gas in the bin body into the waste heat recovery device through the fine filtering device, and the fine filtering device utilizes a multi-stage filter to filter and remove dust of the waste gas.
Further, rubbish temporary storage device includes the casing and sets up the interior coil pipe in the casing, is formed with feed inlet and discharge gate on the casing, and condensate water pipeline and biochemical storehouse comdenstion water export intercommunication are passed through to the one end of interior coil pipe, and the other end is used for linking to each other with effluent disposal system.
Furthermore, the distributed kitchen waste biochemical treatment system further comprises a wastewater treatment system, wherein the wastewater treatment system comprises an oil separating groove and a biological treatment groove, the oil separating groove is connected with a water outlet of the inner coil pipe to receive condensed water in the inner coil pipe, floating oil separated by the oil separating groove is discharged into the drying and dewatering device to be treated, and wastewater in the oil separating groove is discharged into the biological groove to be subjected to biochemical treatment so as to meet the discharge standard of the wastewater.
Further, distributing type kitchen garbage biochemical treatment system still includes exhaust treatment system, and exhaust treatment system includes washing unit, photodissociation unit and active carbon adsorption unit, and biochemical fermentation device exhaust waste gas passes through washing unit, photodissociation unit and active carbon adsorption unit in proper order to satisfy the emission requirement of waste gas.
Further, each device of the garbage temporary storage device, the drying and dehydrating device, the biochemical fermentation device, the wastewater treatment system and the waste gas treatment system is constructed in a prying block mode.
Further, the vacuum dryer is selected from one of a vacuum disc type dryer, a vacuum paddle type dryer or a vacuum rake type dryer, and the steam compressor is a roots compressor or a piston compressor.
The distributed kitchen waste biochemical treatment system has the advantages of the following aspects:
1) according to the distributed kitchen waste biochemical treatment system, the kitchen waste is dried and dehydrated through the steam recompression technology, on one hand, evaporated moisture is very clean, and the burden of wastewater treatment is greatly reduced; on the other hand, the drying and dehydration realize the control of the discharged water content of the kitchen waste, the material water entering the biochemical bin is correspondingly reduced, and the material water content is mixed with the material with high water content after biochemical degradation, so that the kitchen waste in the biochemical bin can be always maintained at the ideal water content for biochemical treatment, and the biochemical treatment of the kitchen waste is facilitated;
2) according to the distributed kitchen waste biochemical treatment system, the kitchen waste after drying and dewatering is fermented by the biochemical fermentation device, so that the biochemical fermentation treatment effect can be effectively ensured, harmful substances such as viruses, pathogenic bacteria and pathogenic microorganisms can be effectively prevented from being generated by the kitchen waste fermented by the biochemical fermentation device, and the kitchen waste can effectively meet the emission requirement;
3) condensed water generated by the steam recompression technology of the distributed kitchen waste biochemical treatment system can be discharged through a condensed water pipeline after sequentially passing through the biochemical fermentation device and the waste temporary storage device, so that the waste heat recovery of the condensed water is realized, the energy consumption is greatly saved, and the waste of heat energy is avoided;
4) each device of the distributed kitchen waste biochemical treatment system is in a prying block form. Therefore, on one hand, the prying block form can meet various requirements of customers; on the other hand, the whole system equipment of the distributed kitchen waste biochemical treatment system is compact, the occupied area is saved, and the site construction is reduced.
Drawings
FIG. 1 is a system flow chart of a distributed biochemical treatment system for kitchen waste according to an embodiment of the present invention;
FIG. 2 is a schematic structural diagram of a drying and dewatering device according to an embodiment of the present invention;
FIG. 3 is a schematic structural diagram of a biochemical fermentation apparatus according to an embodiment of the present invention;
FIG. 4 is a view in the A-A direction of the biochemical fermentation device shown in FIG. 3;
FIG. 5 is a schematic view of the exhaust pipe shown in FIG. 3;
FIG. 6 is a schematic view showing the structure of a biological treatment tank according to an embodiment of the present invention.
Detailed Description
In order to better understand the purpose, structure and function of the present invention, a distributed biochemical treatment system for kitchen waste is described in detail below with reference to the accompanying drawings.
Fig. 1 shows a system flow chart of a distributed kitchen waste biochemical treatment system 100 according to an embodiment of the present invention. As shown in fig. 1, this distributing type kitchen garbage biochemical treatment system 100 is including being used for carrying out the refuse treatment system of preliminary treatment and aerobic fermentation to kitchen garbage, refuse treatment system is including consecutive rubbish temporary storage device, dry dewatering device and biochemical fermenting installation, rubbish temporary storage device is used for keeping in kitchen garbage, dry dewatering device sets to can carry out dry dehydration to the default through steam recompression technique to kitchen garbage, biochemical fermenting installation is used for carrying out aerobic biochemical fermentation with kitchen garbage and handles and discharge to outside. Wherein, distributing type kitchen garbage biochemical treatment system 100 is still including the condensate water pipeline that communicates dry dewatering device, biochemical fermentation device and rubbish temporary storage device in proper order to make the condensate water that produces in the dry dewatering device discharge after can passing through biochemical fermentation device and rubbish temporary storage device in proper order again, with the waste heat recovery who realizes the condensate water.
The distributed kitchen waste biochemical treatment system 100 comprises a waste treatment system, a wastewater treatment system and a waste gas treatment system, wherein the waste treatment system comprises two units, namely waste pretreatment and waste biochemical treatment, so that the waste is subjected to harmless, quantitative reduction and recycling treatment. When the distributed biochemical treatment system 100 for kitchen waste is used, the kitchen waste is pretreated by the waste treatment system, and the pretreatment specifically comprises raw material lifting and weighing, sorting, waste crushing and waste temporary storage. The kitchen waste is lifted to the sorting platform by the aid of the waste lifting machine, the weighing module is mounted on the waste lifting machine, and the kitchen waste is weighed and uploaded to the control system of the distributed kitchen waste biochemical treatment system 100 while being lifted. The sorting is that manual work or machinery is utilized at the letter sorting bench, sorts the inorganic matter kitchen garbage that can not biodegradable, and the kitchen garbage after the letter sorting gets into the rubbish breaker and carries out the breakage, and the shearing breaker can be selected for use in the breakage, and broken particle diameter can be less than 10mm, and its broken purpose makes kitchen garbage carry out drying dehydration and biodegradable more easily. The crushed materials enter a temporary garbage storage device for storage.
The whole treatment is the treatment of the kitchen waste before drying and dehydration, and the waste can be treated to be relatively uniform slurry through the pretreatment. The kitchen waste after pretreatment is dried and dehydrated through the drying and dehydrating device, the drying and dehydrating device is set to achieve drying and dehydrating of the kitchen waste through a vapor recompression technology (MVR process), so that each batch of kitchen waste can be reasonably designed through the drying and dehydrating device and set certain running time to achieve a preset value in a drying and dehydrating mode, the preset value can be set to be 50-60% of the moisture content of each batch of kitchen waste, and the requirement for the optimal moisture content of aerobic biological treatment can be met. Simultaneously, the comdenstion water that steam recompression technique produced can also discharge again through condensate water pipeline behind biochemical fermentation device and the rubbish temporary storage in proper order to realize the waste heat recovery of comdenstion water.
Through the arrangement, the distributed kitchen waste biochemical treatment system 100 provided by the embodiment of the invention has the following advantages:
1) the distributed kitchen waste biochemical treatment system 100 of the embodiment of the invention realizes drying and dehydration of kitchen waste by a vapor recompression technology (MVR process), can meet the requirement of optimal water content for aerobic biological treatment, and can discharge condensed water generated by the vapor recompression technology after sequentially passing through a biochemical fermentation device and a waste temporary storage device through a condensed water pipeline so as to realize waste heat recovery of the condensed water, greatly save energy consumption and avoid waste of heat energy;
2) according to the distributed kitchen waste biochemical treatment system 100 provided by the embodiment of the invention, the kitchen waste after drying and dewatering is subjected to fermentation treatment by the biochemical fermentation device, so that the treatment effect of biochemical fermentation can be effectively ensured, the kitchen waste after fermentation treatment by the biochemical fermentation device can be effectively prevented from generating harmful substances such as viruses, pathogenic bacteria and pathogenic microorganisms, and the kitchen waste can effectively meet the emission requirement of the kitchen waste.
Fig. 2 shows a schematic structural diagram of the drying and dehydrating apparatus 10 according to an embodiment of the present invention. As shown in fig. 2, the drying and dewatering device 10 may include a vacuum dryer 1, the vacuum dryer 1 may include a sealed housing 12 having a steam jacket 11, a first gas-liquid separator 13, and a steam compressor 14, the sealed housing 12 may be formed with a feed inlet 121, a discharge outlet 122, a dryer condensed water return port 123, and a steam outlet 124, and the steam jacket 11 may be formed with a steam inlet 111 and a dryer condensed water outlet 112. Wherein, the steam outlet 124, the gas inlet of the first gas-liquid separator 13, the steam compressor 14 and the steam inlet 111 are connected in sequence, the liquid outlet of the first gas-liquid separator 13 is connected with the condensed water return port 123 of the dryer, and the condensed water outlet 112 of the dryer is connected with the condensed water inlet of the biochemical fermentation device 20 (shown in fig. 3) through a condensed water pipeline.
When the drying and dehydrating device 10 according to the embodiment of the present invention is used, kitchen waste enters the sealed housing 12 of the vacuum dryer 1 from the feed inlet 121 in batches, under the condition that the vapor compressor 14 continuously works, the sealed housing 12 is pumped to a negative pressure (about-40 kpa), under the negative pressure, the boiling point temperature of water on the kitchen waste is changed to about 85 ℃, the kitchen waste is heated by a heating device (not shown in the figure) so that the water in the kitchen waste is flashed into steam when reaching the temperature, the steam is discharged into the first gas-liquid separator 13 through the steam outlet 124, a large amount of steam is compressed and heated by the vapor compressor 14 and then discharged into the steam inlet 111 so as to enter the steam jacket 11 to heat the kitchen waste, and the water in the kitchen waste is evaporated when reaching the boiling point temperature, so that continuous circulation is achieved. The steam in the steam jacket 11 after heat exchange is liquefied into condensed water, and the condensed water is discharged from a dryer condensed water outlet 112 to a condensed water inlet of the biochemical fermentation device 20 through a condensed water pipeline.
Through the arrangement, the drying and dehydrating device 10 provided by the embodiment of the invention can enable the water content of the kitchen waste to be gradually reduced after the kitchen waste is continuously evaporated and dried, can judge the water content of the dried material through the calculated and determined drying time or the weight change of the whole equipment weighing (a weighing module needs to be installed), and discharges the material into the biochemical fermentation device 20 through the discharge hole 122 when the water content (50-60%) required by biochemical treatment is reached. Because the drying and dehydrating device 10 of the embodiment of the invention adopts a steam compression heating mode to dry the garbage, the whole drying and dehydrating process of the kitchen garbage only needs to use the heating device and power when the steam compressor 14 is started initially, and in addition, external steam and other energy sources are not needed, so that the drying and dehydrating device 10 of the embodiment of the invention can effectively utilize the original waste steam, thereby recovering latent heat and improving the heat efficiency. In addition, the drying and dehydrating device 10 of the embodiment of the present invention also liquefies the steam in the steam jacket 11 after heat exchange into condensed water, and the condensed water is discharged into the biochemical fermentation device 20 through the dryer condensed water outlet 112, so as to realize waste heat recovery of the condensed water, greatly save energy consumption, and avoid waste of heat energy.
Statistics shows that the energy consumption of the drying and dehydrating device 10 is estimated to be 120-150 kwh, which is about 20% of that of direct electric heating, when one ton of water is evaporated by the drying and dehydrating device 10, so that the energy-saving effect of the drying and dehydrating device 10 is obvious.
Preferably, as shown in fig. 2, the drying and dehydrating device 10 may further include a second gas-liquid separator 15 and a condensate pump 16, and the dryer condensate outlet 112, the second gas-liquid separator 15, and the condensate pump 16 are sequentially communicated and communicated with the condensate inlet of the biochemical fermentation device 20 through a condensate water pipeline.
Preferably, the vacuum dryer 1 may be selected from one of a vacuum disc type, a vacuum paddle type or a vacuum rake type dryer. The vapor compressor 14 may be a roots compressor or a piston compressor.
FIG. 3 shows a schematic structural diagram of biochemical fermentation apparatus 20 according to an embodiment of the present invention. As shown in fig. 3, the biochemical fermentation device 20 may include a biochemical chamber 2 and a waste heat recovery device 3, the biochemical chamber 2 may include a chamber body 21, an air inlet pipe 22 and an exhaust pipe 23, the waste heat recovery device 3 includes an evaporator heat exchange side and a condenser heat exchange side, the air inlet pipe 22 is connected to the condenser heat exchange side, the exhaust pipe 23 is connected to the evaporator heat exchange side, as shown in fig. 4, the lower portion of the chamber body 21 is arc-shaped, the arc-shaped portion of the chamber body 21 is provided with a condensed water jacket 24, and the condensed water jacket 24 is provided with a biochemical chamber condensed water inlet 241 and a biochemical chamber condensed water outlet 242. Wherein, the biochemical bin condensed water inlet 241 is connected with the condensed water pump 16 of the drying and dehydrating device 10 through a condensed water pipeline to receive the condensed water from the drying and dehydrating device 10.
According to the biochemical fermentation device 20 of the embodiment of the invention, the condensed water jacket 24 is arranged on the arc-shaped part of the bin body 21 and is connected with the condensed water pump 16 of the drying and dehydrating device 10, so that the condensed water liquefied by the steam in the steam jacket 11 after heat exchange can be discharged into the condensed water jacket 24 of the biochemical fermentation device 20 through the drying and dehydrating device 10, and the waste heat recovery of the condensed water can be effectively realized. In addition, the working temperature of biochemical treatment is generally 50-60 ℃, so that when the biochemical fermentation device is used for performing biochemical treatment on the kitchen waste, the working temperature of biochemical treatment can be effectively maintained, and viruses, pathogenic bacteria and pathogenic microorganisms which are possibly generated during the storage period of the kitchen waste can be killed better. The waste heat recovery device 3 in this embodiment adopts a heat pump technology, and can convert low-grade heat sources in the exhaust gas into high-grade heat sources to be used for heating the biochemical fermentation device 20, so that the heat of the exhaust gas can be efficiently recovered, and the effects of energy conservation and emission reduction can be achieved.
Preferably, as shown in fig. 3, the waste heat recovery device 3 may include a heat pump circulation system connected by a compressor 31, a condenser 32, a throttle valve 33, and an evaporator 34 through pipes. The waste gas generated by the biochemical fermentation device 20 is introduced into the heat pump circulating system, and is discharged after heat exchange. According to the invention, when the waste heat recovery device 3 is used, the heat pump working medium is arranged in the heat pump circulating system, and the high-temperature waste gas generated by the biochemical fermentation device 20 is subjected to heat exchange and cooling on the heat exchange side of the evaporator 34 and then is divided into the waste gas path and the condensation water path through the gas-liquid separator. One path of the waste gas path forms a circulating air entering a condenser heat exchange side of the condenser 32, and the other path of the waste gas path is discharged into a waste gas treatment system. The condensate water path is discharged into a wastewater treatment system. The temperature of the waste gas after heat exchange can reach 25 ℃. The heat pump working medium is subjected to heat exchange, is subjected to isobaric evaporation and heat absorption in the evaporator 34, is changed into a gaseous state, and enters the compressor 31 for isentropic compression to obtain high-temperature and high-pressure superheated gas. Then, the working medium of the heat pump is subjected to isobaric condensation and heat release in the condenser 32, the heat is transferred to circulating air, and the circulating air enters the biochemical bin 2 to heat the kitchen waste after the heat exchange is carried out and the temperature of the circulating air can reach more than 60 ℃. The heat pump working medium which emits heat is changed into high-pressure medium-temperature saturated liquid, then the saturated liquid is throttled by the throttle valve 33 to be changed into a mixture of low-temperature low-pressure saturated gas and saturated liquid, and then the saturated liquid enters the evaporator 34 to absorb heat, and the heat recovery purpose is achieved by repeated circulation. Because the strain in the biochemical bin 2 needs to consume certain oxygen for biochemistry, in order to ensure that certain oxygen is supplied in the biochemical bin, a small amount of inlet air is always supplied to the waste heat recovery device 3, and the rest air is circularly dried for use.
Preferably, as shown in fig. 3, the biochemical bin 2 may further include a stirring assembly 25 disposed in the bin body 21, the stirring assembly 25 including a stirrer 251, a stirring shaft 252, and a driving device 253. The stirrer 251 includes a stirring paddle 251a mounted on the stirring shaft 252, a blade 251b is mounted at one end of the stirring paddle 251a, and a driving device 253 connected to the stirring shaft 252 to drive the stirring shaft 252 to rotate. Wherein the adjacent paddles 251a are configured to be arranged to intersect vertically. Through this setting, can make stirring rake 251a stir the kitchen garbage form alternation in the biochemical storehouse 2 to make kitchen garbage's biochemical fermentation treatment's effect better.
Still preferably, as shown in fig. 3, the biochemical fermentation device 20 may further include a gas collection tank assembly 26 and a fine filtration device 4 which are disposed outside the wall plate of the bin body 21, the wall plate is provided with an exhaust hole communicated with the gas collection tank assembly 26, the gas collection tank assembly 26 is provided with an exhaust pipe 23, and the exhaust pipe 23 is connected with the fine filtration device 4 so as to exhaust the exhaust gas in the bin body 21 into the waste heat recovery device 3 through the fine filtration device 4. Wherein, the fine filtering device 4 utilizes a multi-stage filter to filter and remove dust from the waste gas. Through this setting, can filter the dust removal to the exhaust waste gas of arranging effectively.
Further preferably, as shown in fig. 3, the fine filtering device 4 may include a three-stage filter 41 and a fan 42 to prevent impurities in the gas from blocking the waste heat recovery device 3, and also to prevent the finally discharged exhaust gas from exceeding the particulate content. Wherein, the filter 41 can be a basket filter, and the filter 41 is provided with filter screens therein, and the filtering precision of each stage can be set to be different, that is, the number of the filter screens from the first stage to the last stage is gradually increased, so that the precision of the filter 41 is gradually increased accordingly. In addition, a differential pressure gauge 43 with a remote transmission function is arranged before and after each stage of filter 41, and when the differential pressure is higher than a set value, the filter 41 is blocked and needs to be cleaned.
Preferably, the biochemical fermentation device 20 may further include a temperature detector 27, a humidity detector 28 and an oxygen concentration monitor 29 disposed in the bin body 21. The temperature detector 27 and the humidity detector 28 are respectively used for monitoring the temperature and the humidity in the bin body 21, and the oxygen concentration monitor 29 is used for monitoring the oxygen content in the bin body 21 so as to adjust the intake air according to the oxygen content value corresponding to the decomposition condition of the kitchen waste.
Preferably, as shown in fig. 4, the air inlet pipe 22 can be configured as a pipe for supplying air into the bin body 21, and is formed with an air inlet 221 and an air inlet slot, the air inlet pipe 22 branches after entering the bin body 21 and is connected to a horizontal pipe 222, and the horizontal pipe 222 is opened with an air inlet slot.
Preferably, as shown in fig. 3 and 5, the header tank assembly 26 may include: the combination installation is at filter screen 261 and the gas collection box 262 outside the relative wallboard of feed inlet 201 of storehouse body 21, and the exhaust hole constructs the square hole of corresponding size that is linked together with gas collection box 262, is equipped with blast pipe 23 above the gas collection box 262, through corresponding closed installation with the waste gas in the storehouse body 21 through filter screen 261 filtration back discharge outside through blast pipe 23, this filter screen 261 is coarse filtration, and the trompil aperture is 2 ~ 3 mm. It is also preferred that the filter mesh 261 be removable to facilitate cleaning thereof. The exhaust pipes 23 are branched outside the bin and are also connected to the gas collection tank 262. Wherein 202 in fig. 3 is a discharge port of the biochemical fermentation device 20.
In a preferred embodiment, the temporary garbage storage device may include a housing (not shown) and an inner coil (not shown) disposed inside the housing, wherein the housing is formed with a feeding port and a discharging port, one end of the inner coil is connected to the condensed water outlet 242 of the biochemical bin through a condensed water pipeline, and the other end is used for connecting to a wastewater treatment system. Through this setting, the comdenstion water in the comdenstion water jacket 24 of biochemical fermentation device 20 can enter into rubbish temporary storage device through interior coil pipe to rubbish to keeping in the rubbish temporary storage device realizes preheating, thereby further realizes waste heat utilization, simultaneously, this setting can also reduce the purpose of discharging to the temperature of the waste water in the effluent disposal system, thereby more does benefit to the follow-up processing to waste water.
Returning to fig. 1, preferably, the distributed kitchen garbage biochemical treatment system 100 may further include a wastewater treatment system, and the wastewater treatment system may include an oil separation tank and a biological treatment tank. Wherein, the oil separating groove links to each other with the delivery port of inner coil pipe to the comdenstion water in the receiving inner coil pipe, the oil slick that the comdenstion water separates through the oil separating groove discharges and handles in drying and dehydrating device 10, and the waste water in the oil separating groove discharges and carries out biochemical treatment in going into biological treatment groove, in order to satisfy the emission standard of waste water. Specifically, in combination with the above, the wastewater treated by the wastewater treatment system according to the present invention is condensed water generated by garbage pretreatment. The condensed water cooled in the condensed water jacket 24 of the biochemical bin 2 and the inner coil pipe of the garbage temporary storage device is discharged into an oil separating tank, and at the moment, the temperature of the condensed water can be reduced to 30-40 ℃ from about 90 ℃. The waste water is generated by evaporation and is very clean, the Chemical Oxygen Demand (COD) is usually below 5000mg/L, no solid particles exist, and only a trace amount of oil exists, so the waste water is easier to treat. The wastewater enters a biological treatment tank, and the COD in the wastewater is further reduced by utilizing a biological rotating disc treatment technology of high-efficiency filler and bottom aeration, so that the wastewater finally meets the aim of standard discharge.
FIG. 6 shows a schematic structural view of a biological treatment tank 50 according to an embodiment of the present invention. As shown in FIG. 6, the biological treatment tank 50 may comprise a biological tank 51, a biological rotating disk 52, and a rotating disk motor 53. The biological tank 51 is provided with a water inlet 511 and a water outlet 512. Referring to fig. 6, the biological rotating disk 52 is installed on the upper part of the biological tank 51 and can be driven by the rotating disk motor 53 to rotate back and forth at a slow speed, the disk axis of the biological rotating disk 52 is higher than the water surface, and the disk surface of the biological rotating disk 52 is about 40% immersed in the water and about 60% exposed in the air, and the rotating disk of the biological rotating disk 52 is filled with filler. Wastewater enters through the water inlet 511, the disc shaft is driven by the rotary disc motor 53 to rotate, and the disc surface of the biological rotary disc 52 is alternately contacted with the wastewater and air. The disc surface and the filler of the biological rotating disc 52 are covered by a film-shaped object formed by the growth of microorganisms, and the biological film is alternately and fully contacted with the wastewater and the air to continuously obtain pollutants and oxygen, thereby realizing the function of purifying the wastewater. Shear stress is generated between the membrane and the disk surface due to rotation, the weight is increased along with the increase of the thickness of the membrane, and after the weight is increased to a certain degree, the membrane falls off from the disk surface and flows away with water.
Returning to fig. 1, preferably, the distributed kitchen garbage biochemical treatment system 100 may further include a waste gas treatment system, the waste gas treatment system may include a water washing unit, a photolysis unit and an activated carbon adsorption unit, and waste gas discharged from the biochemical fermentation device 20 sequentially passes through the water washing unit, the photolysis unit and the activated carbon adsorption unit to meet the emission requirement of the waste gas. The gas treatment is to purify and deodorize the gas by utilizing the technologies of water washing, UV photolysis and active carbon adsorption, thereby achieving the purpose of standard emission.
The waste gas received by the waste gas treatment system according to the invention is mainly air and water vapor and contains certain odor components, usually mainly ammonia gas, and then trace carbon disulfide, if stirring ventilation is not ideal, the anaerobic environment is formed, hydrogen sulfide can be generated, and other trace odor components can be generated besides the above gas components. Ammonia is a gas that is very soluble in water, and hydrogen sulfide is a gas that is soluble in water. The waste gas treatment system provided by the embodiment of the invention adopts a mode of 'water washing + UV photolysis + activated carbon adsorption' to perform deodorization, the water washing is performed in a water washing tower, most of ammonia gas and part of hydrogen sulfide can be removed, the ammonia gas, the hydrogen sulfide, the carbon disulfide and other components which are not removed enter UV photolysis equipment, the UV photolysis equipment is provided with a UV lamp tube, the UV lamp tube can release high-energy UV light beams, the light beams can break chemical bonds of waste gas components to form free atoms or groups on one hand, on the other hand, oxygen in the waste gas can be cracked, then ozone is generated by combination, and the ozone participates in the reaction, so that the odor components are finally cracked and oxidized into simple stable compounds. The waste gas may still contain trace amount of odor components after passing through the UV photolysis equipment, and finally the waste gas is subjected to activated carbon adsorption treatment, and activated carbon is filled in the activated carbon box, so that the residual odor components can be adsorbed by means of the strong specific surface area of the activated carbon. After the treatment, the waste gas can reach the aim of standard emission.
In a preferred embodiment, each module of the temporary garbage storage, the drying and dehydrating device 10, the biochemical fermentation device 20, the wastewater treatment system and the waste gas treatment system may be constructed in the form of a skid. It should be noted that the form of the pry block can be understood as a series of customizations from design to production installation as requested by the user. Through the arrangement, on one hand, the prying block form can meet various requirements of customers; on the other hand, the whole system equipment of the distributed kitchen waste biochemical treatment system 100 of the embodiment of the invention is compact, the occupied area is saved, and the construction on site is reduced. For example, the temporary garbage storage device, the drying and dehydrating device 10, and the biochemical fermentation device 20 of the garbage disposal system can be individually assembled in a factory in the form of a skid. All facilities needed by the processes of equipment, pipelines, electricity, instruments and the like can be arranged in the prying block, the interior of the system does not need to be installed on site, and the inlet and outlet pipelines and cables are installed only after the equipment is in place.
It is to be noted that, unless otherwise specified, technical or scientific terms used herein shall have the ordinary meaning as understood by those skilled in the art to which the invention pertains.
Furthermore, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention, and they should be construed as being included in the following claims and description. In particular, the technical features mentioned in the embodiments can be combined in any way as long as there is no structural conflict. It is intended that the invention not be limited to the particular embodiments disclosed, but that the invention will include all embodiments falling within the scope of the appended claims.
Claims (10)
1. The utility model provides a distributing type kitchen garbage biochemical treatment system, its characterized in that, including the refuse treatment system who is used for carrying out preliminary treatment and aerobic fermentation to kitchen garbage, refuse treatment system is including consecutive rubbish temporary storage device, dry dewatering device and biochemical fermenting installation, rubbish temporary storage device is used for keeping in kitchen garbage, dry dewatering device sets up and carries out dry dehydration to the default through steam recompression technique to kitchen garbage, biochemical fermenting installation is used for carrying out the biochemical fermentation of kitchen garbage and discharges to outside, wherein, distributing type kitchen garbage biochemical treatment system is still including communicating in proper order dry dewatering device biochemical fermenting installation and the condensate water pipeline of rubbish temporary storage device to make the comdenstion water that produces in the dry dewatering device can pass through in proper order biochemical fermenting installation with discharge again behind the rubbish temporary storage device, so as to realize the waste heat recovery of the condensed water.
2. The distributed kitchen waste biochemical treatment system according to claim 1, wherein the drying and dehydrating device comprises a vacuum dryer, the vacuum dryer comprises a sealed housing with a steam jacket, a first gas-liquid separator and a steam compressor, a feed inlet, a discharge outlet, a dryer condensate water return port and a steam outlet are formed on the sealed housing, a steam inlet and a dryer condensate water outlet are formed on the steam jacket, wherein the steam outlet, a gas inlet of the first gas-liquid separator, the steam compressor and the steam inlet are sequentially connected, a liquid outlet of the first gas-liquid separator is connected with the dryer condensate water return port, and the dryer condensate water outlet is connected with a condensate water inlet of the biochemical fermentation device through the condensate water pipeline.
3. The distributed kitchen waste biochemical treatment system according to claim 2, wherein the drying and dehydrating device further comprises a second gas-liquid separator and a condensate pump, and the dryer condensate outlet, the second gas-liquid separator and the condensate pump are sequentially communicated and communicated with a condensate inlet of the biochemical fermentation device through the condensate pipeline.
4. The distributed biochemical treatment system for kitchen waste according to claim 3, wherein the biochemical fermentation device comprises a biochemical bin and a waste heat recovery device, the biochemical bin comprises a bin body, an air inlet pipe and an exhaust pipe, the waste heat recovery device comprises an evaporator heat exchange side and a condenser heat exchange side, the air inlet pipe is connected with the condenser heat exchange side, the exhaust pipe is connected with the evaporator heat exchange side, the lower part of the bin body is arc-shaped, a condensed water jacket is arranged on the arc-shaped part of the bin body, a biochemical bin condensed water inlet and a biochemical bin condensed water outlet are arranged on the condensed water jacket, and the biochemical bin condensed water inlet is connected with a condensed water pump of the drying and dewatering device through the condensed water pipeline so as to receive condensed water from the drying and dewatering device.
5. The distributed biochemical treatment system for kitchen waste according to claim 4, wherein the biochemical fermentation device further comprises a gas collection tank assembly and a fine filtration device, the gas collection tank assembly and the fine filtration device are arranged outside a wall plate of the bin body, the wall plate is provided with an exhaust hole communicated with the gas collection tank assembly, an exhaust pipe is formed on the gas collection tank assembly and connected with the fine filtration device so as to discharge waste gas in the bin body into the waste heat recovery device through the fine filtration device, and the fine filtration device utilizes a multi-stage filter to filter and remove dust from the waste gas.
6. The distributed biochemical treatment system for the kitchen waste according to claim 4, wherein the temporary garbage storage device comprises a shell and an inner coil pipe arranged in the shell, a feeding hole and a discharging hole are formed in the shell, one end of the inner coil pipe is communicated with a condensed water outlet of the biochemical bin through a condensed water pipeline, and the other end of the inner coil pipe is connected with a wastewater treatment system.
7. The distributed kitchen waste biochemical treatment system according to claim 6, further comprising a wastewater treatment system, wherein the wastewater treatment system comprises an oil separating tank and a biological treatment tank, wherein the oil separating tank is connected with a water outlet of the inner coil pipe to receive condensed water in the inner coil pipe, floating oil separated by the oil separating tank is discharged into the drying and dewatering device for treatment, and wastewater in the oil separating tank is discharged into the biological tank for biochemical treatment to meet the wastewater discharge standard.
8. The distributed kitchen waste biochemical treatment system according to claim 7, characterized in that, the distributed kitchen waste biochemical treatment system further includes a waste gas treatment system, the waste gas treatment system includes a water washing unit, a photolysis unit and an active carbon adsorption unit, the waste gas discharged by the biochemical fermentation device passes through the water washing unit, the photolysis unit and the active carbon adsorption unit in sequence to satisfy the emission requirement of the waste gas.
9. The distributed biochemical treatment system for kitchen waste according to claim 8, wherein each of the temporary waste storage device, the drying and dehydrating device, the biochemical fermentation device, the wastewater treatment system and the waste gas treatment system is constructed in a form of a skid.
10. The distributed kitchen waste biochemical treatment system according to any one of claims 2 to 9, wherein the vacuum dryer is one selected from a vacuum disc type, a vacuum paddle type or a vacuum rake type dryer, and the vapor compressor is a roots compressor or a piston compressor.
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| CN202010870923.8A CN114101299A (en) | 2020-08-26 | 2020-08-26 | Distributed biochemical treatment system for kitchen waste |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115121592A (en) * | 2022-07-11 | 2022-09-30 | 北京四良科技有限公司 | Micro-aerobic enzymolysis system and process for dining table residual food with heat energy recycled |
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2020
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115121592A (en) * | 2022-07-11 | 2022-09-30 | 北京四良科技有限公司 | Micro-aerobic enzymolysis system and process for dining table residual food with heat energy recycled |
| CN115121592B (en) * | 2022-07-11 | 2023-08-25 | 北京恒诺信达生物技术有限公司 | Dining table residual food micro-oxygen enzymolysis system and technology capable of recycling heat energy |
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