CN114101271A - Distributed biochemical treatment system for kitchen waste - Google Patents

Abstract

The invention belongs to the technical field of kitchen waste treatment, and discloses a distributed kitchen waste biochemical treatment system. The distributed kitchen waste biochemical treatment system comprises a waste treatment system for pretreating and aerobically fermenting kitchen waste, wherein the waste treatment system comprises a waste temporary storage device, a drying and dehydrating device and a biochemical fermentation device which are sequentially connected, and the waste temporary storage device is used for temporarily storing the kitchen waste; the drying and dehydrating device can be used for drying and dehydrating the kitchen waste to a preset value; the biochemical fermentation device is used for carrying out aerobic fermentation treatment on the kitchen waste and discharging the kitchen waste to the outside. The distributed biochemical treatment system for the kitchen waste enables the kitchen waste to meet the requirement of the condition suitable for biochemical treatment during biochemical treatment, and can effectively reduce the energy consumption of the system.

Description

Distributed biochemical treatment system for kitchen waste

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 biochemical treatment is carried out in equipment which is provided with mechanical stirring, forced heating and ventilation, and the equipment has the biggest characteristic of high treatment speed (generally, the retention time is 1-3 days), and the equipment occupies 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 fermentation bin for aerobic biochemical treatment, and feeding the sewage into a water treatment system.

However, in the process of biochemical treatment of the kitchen waste in the prior art, because the components of the kitchen waste are complex, the moisture content of the mechanically dehydrated material can still reach 65-70% generally, and the moisture content suitable for 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 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.

Disclosure of Invention

In order to solve all or part of the problems, the invention aims to provide a distributed kitchen waste biochemical treatment system, 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.

The distributed kitchen waste biochemical treatment system comprises a waste treatment system for pretreating and aerobically fermenting kitchen waste, wherein the waste treatment system comprises a waste temporary storage device, a drying and dehydrating device and a biochemical fermentation device which are sequentially connected, and the waste temporary storage device is used for temporarily storing the kitchen waste; the drying and dehydrating device can be used for drying and dehydrating the kitchen waste to a preset value; the biochemical fermentation device is used for carrying out aerobic fermentation treatment on the kitchen waste and discharging the kitchen waste to the outside.

Further, the drying and dehydrating device comprises a dryer and a first dehumidifying module, wherein the first dehumidifying module comprises a first compressor, a first condenser, a first throttle valve, a first evaporator and a first gas-liquid separator, and the first compressor, the first condenser, the first throttle valve and the first evaporator are sequentially connected through a pipeline to form a first heat pump circulating system; the gas outlet of the dryer, the evaporator heat exchange side of the first evaporator, the gas outlet of the first gas-liquid separator, the condenser heat exchange side of the first condenser and the gas inlet of the dryer are sequentially connected through pipelines to form a first gas circuit circulating system; the liquid outlet of the first gas-liquid separator is connected with a wastewater treatment system.

Further, the biochemical fermentation device comprises a fermentation bin and a second dehumidification module, the second dehumidification module comprises a second compressor, a second condenser, a second throttle valve, a second evaporator and a second gas-liquid separator, and the second compressor, the second condenser, the second throttle valve and the second evaporator are sequentially connected through a pipeline to form a second heat pump circulation system; the gas outlet of the fermentation bin, the evaporator heat exchange side of the second evaporator, the gas outlet of the second gas-liquid separator, the condenser heat exchange side of the second condenser and the gas inlet of the fermentation bin are sequentially connected through pipelines to form a second gas path circulating system; the liquid outlet of the second gas-liquid separator is connected with a wastewater treatment system.

Further, the gas outlet of the second gas-liquid separator is also arranged to be connected with a waste gas treatment system in an on-off manner.

Furthermore, the gas inlet of the condenser heat exchange side of the second condenser is also connected with an external air inlet system in a switching mode.

Further, biochemical fermentation device still includes the smart filter equipment who communicates between the gas outlet in fermentation storehouse and second dehumidification module, and smart filter equipment includes multistage filter and fan, and every grade of filter's filter fineness risees gradually, and every grade of filter is provided with the differential pressure gauge.

Further, the garbage disposal system still includes sorting device and breaker that set up before the process of rubbish temporary storage device, and distributing type kitchen garbage biochemical treatment system still includes effluent disposal system, and effluent disposal system includes oil separating groove and biological treatment groove, and wherein, the solid in the biological treatment groove can be discharged and is handled in sorting device and breaker once more.

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.

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, so that evaporated water 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) according to the distributed kitchen waste biochemical treatment system, the dehumidification modules are respectively arranged on the drying and dehydration device and the biochemical fermentation device, so that the distributed kitchen waste biochemical treatment system adopts the dehumidification technology of the air source heat pump, the energy consumption can be greatly saved, the waste gas amount is small, and the load of waste gas treatment is reduced;

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 system flow diagram of the first dehumidification module shown in FIG. 1;

FIG. 3 is a system flow diagram of the second dehumidification module shown in FIG. 1.

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 is a system process flow diagram of a distributed kitchen waste biochemical treatment system 100 according to an embodiment of the present invention. As shown in fig. 1, the distributed kitchen waste biochemical treatment system 100 includes a waste treatment system 10 for performing pretreatment and aerobic fermentation on kitchen waste, and the waste treatment system 10 includes a waste temporary storage device 1, a drying and dehydrating device 2, and a biochemical fermentation device 3, which are connected in sequence. Wherein, rubbish temporary storage device 1 is used for keeping in kitchen garbage, and dry dewatering device 2 can be used for carrying out dry dehydration to the default with kitchen garbage, and biochemical fermentation device 3 is used for carrying out aerobic fermentation with kitchen garbage and handles and discharge to outside.

The distributed kitchen waste biochemical treatment system 100 comprises a waste treatment system 10, a waste water treatment system 20 and a waste gas treatment system 30, wherein the waste treatment system 10 comprises two units of waste pretreatment and waste biochemical treatment, and can carry out harmless, quantitative reduction and resource treatment on waste. When the distributed biochemical treatment system 100 for kitchen waste provided by the embodiment of the invention is used, the kitchen waste is pretreated by the waste treatment system 10, 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 letter sorting utilizes manual work or machinery 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 type breaker can be chooseed for use in the breakage, and broken particle diameter is less than 10mm, and 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 2, so that each batch of kitchen waste can be dried and dehydrated to a preset value through reasonable design and certain set operation time, the preset value is that the water content of each batch of kitchen waste is 50-60%, and the optimal water content requirement of aerobic biological treatment can be met. The kitchen waste after drying and dewatering is fermented and processed by the biochemical fermentation device 3, so that the biochemical fermentation treatment effect can be effectively guaranteed, harmful substances such as viruses, pathogenic bacteria and pathogenic microorganisms can be effectively avoided from being generated by the kitchen waste after being fermented and processed by the biochemical fermentation device, and the emission requirement of the kitchen waste can be effectively met.

Preferably, as shown in fig. 1, the drying and dehydrating device 2 may include a dryer 21 and a first dehumidifying module 22. In a preferred embodiment shown in fig. 2, the first dehumidification module 22 may include a first compressor 221, a first condenser 222, a first throttle valve 223, a first evaporator 224, and a first gas-liquid separator 225. The first compressor 221, the first condenser 222, the first throttle valve 223 and the first evaporator 224 are connected in sequence by pipes to form the first heat pump cycle 22 a. The gas outlet of the dryer 21, the evaporator heat exchange side of the first evaporator 221, the gas outlet of the first gas-liquid separator 225, the condenser heat exchange side of the first condenser 222, and the gas inlet of the dryer 21 are connected in sequence through pipes to form a first gas circuit circulation system 22 b. It should be noted that, in order to ensure the gas flowing and reaching a certain degree of cleanliness, a pressurizing device and a filtering device, which are not shown in the figure, are also required to be disposed in the first air circulation system 22 b. The liquid outlet of the first gas-liquid separator 225 is connected to the wastewater treatment system 20.

When the first dehumidification module 22 according to the present invention is used, the pipes and the devices of the first heat pump cycle system 22a are filled with a heat pump working medium. Firstly, kitchen waste enters the dryer 21 from a feed inlet of the dryer 21 in batches, high-temperature dry air enters the dryer 21 and contacts with the kitchen waste to heat the kitchen waste, so that water in the kitchen waste is formed into steam which is melted into high-temperature gas, the high-temperature gas with steam reaches the heat exchange side of the evaporator of the first evaporator 224 through the first air path circulating system 22b, the high-temperature gas exchanges heat with a heat pump working medium to reduce the temperature, the steam carried by the high-temperature gas is condensed, the condensed water is discharged to the wastewater treatment system 20 through the first gas-liquid separator 225, and the air with the steam removed is changed into low-humidity cold dry air which is continuously circulated to the condenser of the first condenser 222 to change the hot side. The heat pump working medium of the first heat pump circulating system 22a absorbs heat in the first evaporator 224 and then is subjected to isobaric evaporation to become a gas state, the gas state enters the first compressor 221 to be subjected to isentropic compression to become high-temperature high-pressure superheated gas, then the heat pump working medium is subjected to isobaric condensation in the first condenser 222 to release heat to circulating cold dry air with low humidity, the cold dry air is heated by the first condenser 222 to reach a temperature higher than 60 ℃, the cold dry air enters the dryer 21 to be continuously heated, the heat pump working medium which releases heat is changed into high-pressure medium-temperature saturated liquid, then the saturated liquid is throttled by the first throttle valve 223 to become a mixture of low-temperature low-pressure saturated gas and saturated liquid, and then the mixture enters the first evaporator 224 to absorb heat and is repeatedly circulated to achieve the purpose of gas dehumidification.

Through the arrangement, in the drying and dehydrating process of the kitchen waste, the drying and dehydrating device 2 according to the embodiment of the invention utilizes the first heat pump circulating system 22a and the first air path circulating system 22b of the first dehumidifying module 22, so that the steam dehydrated in the dryer 21 can be recycled after waste heat recovery, and the drying and dehydrating device 2 according to the embodiment of the invention can achieve the purpose of saving energy while removing more water by using less electric energy. Preferably, the dryer 21 may be a rake dryer.

In the preferred embodiment illustrated in fig. 1, the biochemical fermentation device 3 may include a fermentation chamber 31 and a second dehumidification module 32. As shown in connection with fig. 3, the second dehumidification module 32 may include a second compressor 321, a second condenser 322, a second throttle valve 323, a second evaporator 324, and a second gas-liquid separator 325. The second compressor 321, the second condenser 322, the second throttle 323, and the second evaporator 324 are sequentially connected via pipes to form the second heat pump cycle system 32 a. The gas outlet of the fermentation bin 31, the evaporator heat exchange side of the second evaporator 324, the gas outlet of the second gas-liquid separator 325, the condenser heat exchange side of the second condenser 322 and the gas inlet of the fermentation bin 31 are connected in sequence through pipelines to form a second gas circuit circulating system 32 b. It should be noted that, in order to ensure that the gas can flow and reach a certain degree of cleanliness, a pressure boosting device and a filtering device, which are not shown in the figure, are also required to be disposed in the second gas circuit circulating system 32 b. The liquid outlet of the second gas-liquid separator 325 is connected to the wastewater treatment system 20. When the second dehumidification module 32 according to the present invention is used, the pipes and devices of the second heat pump circulation system 32a are filled with heat pump working medium, and the second dehumidification module 32 and the first dehumidification module 22 have the same use principle and effect, and therefore, the detailed description thereof is omitted.

Preferably, as shown in fig. 3, the gas outlet of the second gas-liquid separator 325 may be further provided to be connected to the offgas processing system 30 to be openable and closable. It is also preferred that the gas inlet of the condenser heat exchange side of the second condenser 322 is also configured to be on/off connected to an external air intake system. Since the aerobic bacteria in the biochemical process of the fermentation chamber 31 consume oxygen, in this embodiment, the gas outlet of the second gas-liquid separator 325 is connected to the waste gas treatment system 30 in a switchable manner, and the gas inlet of the heat exchange side of the condenser of the second condenser 322 is connected to the external air intake system in a switchable manner, so that the air in the fermentation chamber 31 can be supplemented and discharged when needed. For example, when the oxygen content in the fermentation chamber 31 is lower than a certain value (for example, the oxygen content is lower than 15%), the aerobic environment in the fermentation chamber 31 can affect the degradation of organic matters. At this time, an air intake system connected to the air inlet of the condenser heat exchange side of the second condenser 322 may be used to automatically supplement the air. Because the air is supplemented only for maintaining the propagation of the strains, compared with the direct heating and drying, the method can save the power consumption and greatly reduce the emission of waste gas, thereby greatly reducing the treatment load of a subsequent waste gas treatment system.

In a preferred embodiment, the fermentation chamber 31 may include a chamber body, an air inlet pipe connected to the condenser heat exchange side of the second condenser 322, and an air outlet pipe connected to the evaporator heat exchange side of the second evaporator 324. The fermentation chamber 31 may further include a stirring assembly disposed in the chamber body of the fermentation chamber 31, and the stirring assembly includes a stirrer, a stirring shaft and a driving device. The stirrer comprises a stirring paddle arranged on the stirring shaft, blades are arranged at two ends of the stirring paddle, and the driving equipment is connected with the stirring shaft to drive the stirring shaft to rotate. Wherein, adjacent stirring paddles are constructed to be vertically crossed.

Preferably, the biochemical fermentation device 3 may further comprise a temperature detector and an oxygen concentration monitor arranged in the fermentation chamber 31. The temperature detector is used for monitoring the temperature in the cabin, and the oxygen concentration monitor is used for monitoring the oxygen content in the cabin. The biochemical fermentation device 3 is internally provided with an oxygen concentration detector which can adjust the air intake according to the oxygen content value corresponding to the decomposition condition of the kitchen waste.

In a preferred embodiment, the biochemical fermentation device 3 may further include a fine filtering device (not shown in the figure) connected between the gas outlet of the fermentation chamber 31 and the second dehumidification module 32, the fine filtering device may include multiple stages of filters and a fan, the filtering precision of each stage of filter is gradually increased, and each stage of filter is provided with a differential pressure gauge to prevent impurities in the gas from blocking the waste heat recovery device and simultaneously prevent the particulate matter content of the final exhaust gas from exceeding the standard. Wherein, the filter can select basket filter, has the filter screen in the filter, and the filter fineness of every grade can set up to different, and the mesh number that from the first grade to the last grade filter screen gradually increases promptly, and the precision increases thereupon gradually. In addition, a differential pressure meter with a remote transmission function is arranged in front of and behind each stage of filter, and when the differential pressure is higher than a set value, the blockage of the filter needs to be cleaned.

Returning to fig. 1, preferably, the garbage disposal system 10 may further include a sorting device 4 and a crushing device 5 disposed before the working procedure of the garbage temporary storage device 1, the distributed kitchen garbage biochemical treatment system 100 may further include a wastewater disposal system 20, and the wastewater disposal system 20 may include an oil separation tank 201 and a biological disposal tank 202. Wherein the water discharged after the treatment in the biological treatment tank 202 may be partially introduced into the sorting device 4 and the crushing device 5 to be used as washing water to save fresh water. Since the waste water is generated by evaporation, it is already very clean. Generally, the Chemical Oxygen Demand (COD) in the wastewater is below 5000mg/L, no solid particles exist, and only a trace amount of oil exists, so that the wastewater is easier to treat. The wastewater enters a biological treatment tank 202, 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.

In a preferred embodiment, the biological treatment tank 202 may comprise a biological tank, a biological rotating disk, and a rotating disk motor. The biological tank is provided with a water inlet and a water outlet. The biological rotating disk is arranged at the upper part of the biological tank and can rotate at a low speed in a reciprocating way under the driving of a rotating disk motor, the disk shaft of the biological rotating disk is higher than the water surface, about 40 percent of the disk surface of the biological rotating disk is immersed in the water and about 60 percent of the disk surface of the biological rotating disk is exposed in the air, and the rotating disk of the biological rotating disk is filled with filler. Wastewater enters through the water inlet, the disc shaft rotates under the driving of the rotary disc motor, and the disc surface of the biological rotary disc is alternately contacted with the wastewater and air. The plate surface and the filler of the biological rotating disc 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 film and the disk surface due to rotation, the weight is increased along with the increase of the thickness of the film, and after the weight is increased to a certain degree, the film falls off from the disk surface and is discharged into the sorting device 4 and the crushing device 5 for treatment again.

Returning to fig. 1, preferably, the distributed kitchen waste biochemical treatment system 100 may further include an exhaust gas treatment system 30, the exhaust gas treatment system 30 may include a water washing unit 301, a photolysis unit 302 and an activated carbon adsorption unit 303, and the exhaust gas discharged from the biochemical fermentation device 3 sequentially passes through the water washing unit 301, the photolysis unit 302 and the activated carbon adsorption unit 303 to meet the emission requirement of the exhaust 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 exhaust gas received by the exhaust gas treatment system 30 according to the present invention is primarily air and water vapor and contains certain odorous components, typically primarily ammonia, and secondarily trace amounts of carbon disulfide, which may generate hydrogen sulfide if the agitation and ventilation are not ideal to form an anaerobic environment, and possibly other odorous components in addition to the above-mentioned gaseous 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, the modules of the temporary garbage storage 1, the drying and dewatering device 2, the biochemical fermentation device 3, the wastewater treatment system 20 and the waste gas treatment system 30 can 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 and the biochemical fermentation device of the garbage disposal system can be separately assembled in a factory in a prying block mode. 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. A distributed kitchen waste biochemical treatment system is characterized by comprising a waste treatment system for pretreating and aerobically fermenting kitchen waste, wherein the waste treatment system comprises a waste temporary storage device, a drying and dehydrating device and a biochemical fermentation device which are sequentially connected, wherein the waste temporary storage device is used for temporarily storing the kitchen waste; the drying and dehydrating device can be used for drying and dehydrating the kitchen waste to a preset value; the biochemical fermentation device is used for carrying out aerobic fermentation treatment on the kitchen waste and discharging the kitchen waste to the outside.

2. The distributed biochemical treatment system for the kitchen waste according to claim 1, wherein the drying and dehydrating device comprises a dryer and a first dehumidifying module, the first dehumidifying module comprises a first compressor, a first condenser, a first throttle valve, a first evaporator and a first gas-liquid separator, wherein the first compressor, the first condenser, the first throttle valve and the first evaporator are sequentially connected through a pipeline to form a first heat pump circulating system; the gas outlet of the dryer, the evaporator heat exchange side of the first evaporator, the gas outlet of the first gas-liquid separator, the condenser heat exchange side of the first condenser and the gas inlet of the dryer are sequentially connected through pipelines to form a first gas circuit circulating system; and the liquid outlet of the first gas-liquid separator is connected with a wastewater treatment system.

3. The distributed biochemical treatment system for the kitchen waste according to claim 1, wherein the biochemical fermentation device comprises a fermentation bin and a second dehumidification module, the second dehumidification module comprises a second compressor, a second condenser, a second throttle valve, a second evaporator and a second gas-liquid separator, and the second compressor, the second condenser, the second throttle valve and the second evaporator are sequentially connected through a pipeline to form a second heat pump circulation system; the gas outlet of the fermentation bin, the evaporator heat exchange side of the second evaporator, the gas outlet of the second gas-liquid separator, the condenser heat exchange side of the second condenser and the gas inlet of the fermentation bin are sequentially connected through pipelines to form a second gas path circulating system; and the liquid outlet of the second gas-liquid separator is connected with a wastewater treatment system.

4. The distributed biochemical treatment system for the kitchen waste according to claim 3, wherein the gas outlet of the second gas-liquid separator is further configured to be connected with a waste gas treatment system in an on-off manner.

5. The distributed biochemical treatment system for the kitchen waste according to claim 4, wherein the gas inlet of the heat exchange side of the condenser of the second condenser is further configured to be connected with an external air inlet system in a switching manner.

6. The distributed biochemical treatment system for kitchen waste according to claim 5, wherein the biochemical fermentation device further comprises a temperature detector and an oxygen concentration monitor which are arranged in the fermentation chamber, the temperature detector is used for monitoring the temperature in the fermentation chamber, and the oxygen concentration monitor is used for monitoring the oxygen content in the fermentation chamber.

7. The distributed biochemical treatment system for the kitchen waste according to claim 3, wherein the biochemical fermentation device further comprises a fine filtration device communicated between the gas outlet of the fermentation bin and the second dehumidification module, the fine filtration device comprises a multi-stage filter and a fan, the filtration precision of each stage of the filter is gradually increased, and each stage of the filter is provided with a differential pressure gauge.

8. The distributed kitchen waste biochemical treatment system according to any one of claims 1 to 7, further comprising a sorting device and a crushing device arranged before the working procedure of the waste temporary storage device, and further comprising a wastewater treatment system, wherein the wastewater treatment system comprises an oil separation tank and a biological treatment tank, and water discharged after being treated by the biological treatment tank can be partially introduced into the sorting device and the crushing device to be used as flushing water.

9. The distributed kitchen waste biochemical treatment system according to claim 8, characterized in that, the distributed kitchen waste biochemical treatment system further comprises a waste gas treatment system, the waste gas treatment system comprises a water washing unit, a photolysis unit and an active carbon adsorption unit, waste gas discharged by the biochemical fermentation device sequentially passes through the water washing unit, the photolysis unit and the active carbon adsorption unit to meet the emission requirement of the waste gas.

10. The distributed biochemical treatment system for kitchen waste according to claim 9, 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.

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