CN113969201A

CN113969201A - City solid waste cooperative treatment system

Info

Publication number: CN113969201A
Application number: CN202010705577.8A
Authority: CN
Inventors: 陈沛波; 欧志明; 岳汉; 曾秀仪; 王嘉颖; 黄嘉伟
Original assignee: Shenzhen Zenergy Co ltd
Current assignee: Shenzhen Zenergy Co ltd
Priority date: 2020-07-21
Filing date: 2020-07-21
Publication date: 2022-01-25

Abstract

The application provides a municipal solid waste co-processing system.A kitchen waste pretreatment module is used for pulping, flocculating, conditioning and dehydrating to obtain a first solid product; the fecal sewage and sludge pretreatment module is used for flocculation, conditioning and dehydration treatment to obtain a second solid product; the waste plastic pretreatment module is used for chopping to obtain broken plastic blocks; the waste cloth leather pretreatment module is used for crushing to obtain broken pieces of waste cloth leather; the landscaping pretreatment module is used for sorting, crushing and drying to obtain crushed dry waste; and the granulation module is used for respectively carrying out independent granulation and/or proportionally mixing granulation on the first solid product, the second solid product, the broken plastic blocks, the broken waste cloth leather blocks and the crushed dry waste to obtain the granular environment-friendly fuel. The method and the device solve the technical problems that the prior art still has great defects in treatment of various urban solid wastes, and the urban solid waste treatment is difficult to be carried out according to the 'three-transformation' principle.

Description

City solid waste cooperative treatment system

Technical Field

The application relates to the technical field of waste treatment, in particular to a city solid waste cooperative treatment system.

Background

Solid waste refers to solids, semi-solids and gaseous materials, materials placed in containers that are discarded or discarded during manufacturing, life and other activities without loss of value, and materials, materials that are regulated by laws and administrative regulations for inclusion in waste management.

According to published data of annual newspaper for preventing and treating solid waste from polluting environment in the whole big and middle cities in 2019, the general solid waste production amount in the big and middle cities is 17.6 hundred million tons. Along with the continuous improvement of social economy and people's living standard, the discharge amount of solid waste is increasing day by day, and the environmental pollution pressure of the solid waste is larger.

The urban solid waste has complex components, such as kitchen garbage, sludge, excrement residues, waste plastics, waste cloth and leather, landscaping waste and the like.

The kitchen waste has the characteristics of high water content, high organic matter content, complex components and the like, and the conventional old methods of crushing, direct discharging, landfill, fertilizer treatment and feed treatment are mostly adopted in the conventional treatment mode, so that a large amount of energy is wasted, and secondary pollution is caused to the environment. The existing energy treatment methods mainly comprise an incineration method, a thermal decomposition method and a fermentation hydrogen production method, and the methods have the advantages of low energy utilization rate, high energy consumption, and poor stability and economy.

The sludge is mainly from urban sewage treatment plants, and has the characteristics of high water content, high organic matter content, heavy metal harmful substances and the like. At present, the treatment methods of sanitary landfill, anaerobic digestion, aerobic fermentation, drying incineration and the like exist. The landfill capacity is limited, the sludge percolate and the secondary pollution are easy to cause, in recent years, the case that the landfill site refuses to accept the sludge is frequently not fresh, and the disposal mode of the landfill is gradually abandoned; anaerobic digestion is the most widely applied sludge stabilization and resource method internationally at present, but the problems of poor sludge biodegradability, long system treatment time, high sewage purification cost and the like in China are solved, so that the method is 'water and soil unappealing'; the greatest limitations of aerobic fermentation are that the fertilizer has large production amount, low nutrient content, easy soil hardening after long-term use, low fertilizer efficiency, no application in agriculture and no market selling of the fertilizer; the drying incineration is a conventional method for treating sludge in China, the sludge is dehydrated to about 40 percent and is mixed with a certain amount of auxiliary fuel for burning, and the energy utilization value is not high.

After the dung residues are cleared, no special treatment mode exists, and partial dung-clearing vehicle drivers dump the dung residues randomly, so that the urban environmental sanitation and drinking water quality are seriously affected, and secondary pollution of the dung residues is caused. If the harmless treatment can not be effectively carried out in time, serious environmental pollution can be caused, and the method is mainly reflected in water, atmosphere, soil, disease source propagation and the like.

The waste cloth and leather have high organic matter content and higher recycling value. If not utilized, not only resources are wasted, but also the environment is polluted.

Landscaping generally includes dead branches, wet-rotting roots and stems, fallen leaves, rotted flowers, wood chips, garden trimming residues and the like of plants, wherein the branches are mainly used and account for about 70%. The biological organic matter content of the wastes is high, so that the wastes have a certain combustion heat value, and the wastes are directly incinerated or buried to form the most conventional disposal means with the lowest cost. Along with the gradual deepening of the demand of society for landscaping and the gradual expansion of scale, due to the different characteristics of varieties, ages and growth of garden plants, the components of wastes are indefinite in shape, different in size, soft and hard, and the coexistence of dry and wet, the traditional conventional means is not only difficult to simplify and direct in treatment, but also quite inconvenient in treatment, time-consuming and labor-consuming, unobvious in effect, causes the great waste of organic matter resources, and does not meet the transformation requirements of current social conservation, low-carbon type and cyclic utilization.

Therefore, the prior art still has great defects for various urban solid waste treatment modes, treatment areas are not uniform, and the urban solid waste treatment is difficult to make a 'three-transformation' principle, namely a reduction, harmless and recycling principle.

Disclosure of Invention

The application aims to provide a city solid waste cooperative treatment system, which solves the technical problems that the treatment of various city solid wastes still has great defects in the prior art, and the city solid waste treatment is difficult to be carried out according to the principle of 'three-in-one'.

The application provides a solid useless cooperative processing system in city, includes: the system comprises a kitchen waste pretreatment module, a dung residue and sludge pretreatment module, a waste plastic pretreatment module, a waste cloth and leather pretreatment module, a landscaping pretreatment module and a granulation module;

the kitchen waste pretreatment module is used for performing slurrying, flocculation, conditioning and dehydration treatment on the kitchen waste to obtain a first solid product;

the fecal slag and sludge pretreatment module is used for performing flocculation, conditioning and dehydration treatment on fecal slag and sludge to obtain a second solid product;

the waste plastic pretreatment module is used for cutting up waste plastics to obtain broken plastic blocks;

the waste cloth leather pretreatment module is used for crushing waste cloth leather to obtain broken pieces of the waste cloth leather;

the landscaping pretreatment module is used for sorting, crushing and drying landscaping waste to obtain crushed dry waste;

and the granulation module is used for respectively carrying out independent granulation and/or proportionally mixing granulation on the first solid product, the second solid product, the broken plastic blocks, the broken waste cloth leather blocks and the broken dry waste to obtain the granular environment-friendly fuel.

Further, the fecal sewage and sludge pretreatment module is specifically used for:

step 101, mixing the excrement residue slurry, sludge, an acid-base regulator and a flocculating agent in a reactor to obtain a first reaction liquid, wherein the pH value of the first reaction liquid is 4-7;

102, conveying the first reaction liquid in the reactor to a conditioning tank through a first conveying mechanism;

103, mixing the first reaction liquid and a modified stabilizer in the conditioning tank to obtain a second reaction liquid;

and 104, dehydrating the second reaction solution in a dehydrating device to obtain a second solid product, wherein the water content of the second solid product is 10-15%.

Further, the kitchen waste pretreatment module is specifically used for:

step 201, sequentially crushing and slurrying kitchen waste to obtain kitchen waste slurry;

202, mixing the kitchen waste slurry, sludge, an acid-base regulator, a first reagent and polyacrylamide to obtain first mixed slurry, wherein the pH value of the first mixed slurry is less than 7;

step 203, mixing the first mixed slurry with a second reagent to obtain a second mixed slurry;

and 204, dehydrating the second mixed slurry to obtain a first solid product, wherein the water content of the environment-friendly fuel is less than 15%.

Further, the waste plastic pretreatment module is specifically configured to:

step 301, cutting waste plastics in a plastic crusher to obtain broken plastic blocks;

step 302, storing the shredded plastic pieces in a shredded plastic bin.

Further, the waste cloth leather pre-treatment module is used for:

step 401, crushing the waste cloth leather in a cloth crusher to obtain broken pieces of the waste cloth leather;

and 402, storing the waste cloth leather fragments in a cloth crushing bin.

Further, the landscaping waste pretreatment module is specifically used for:

501, sorting landscaping wastes in a sorting device to distinguish dry wastes and wet wastes;

step 502, crushing the dry waste and the wet waste in a crusher to obtain crushed dry waste and crushed wet waste.

Step 503, drying the pulverized wet waste in a dryer to obtain pulverized dry waste;

and 504, storing the crushed dry waste in a material bin.

Further, the first reagent is selected from one or more of polyaluminium chloride, polyaluminium silicate and alum.

Further, the flocculant is polymeric aluminum ferric sulfate PAFCS and/or polyacrylamide PAM.

Further, the step 101 further includes: deodorizing the interior of the reactor;

the step 103 further comprises: the interior of the conditioning tank is subjected to deodorization treatment;

the step 104 further comprises: and deodorizing the inside of the dehydration device.

Further, the modified stabilizer is calcium oxide.

According to the technical scheme, the embodiment of the application has the following advantages:

the urban solid waste co-processing system comprises a kitchen waste pretreatment module, a dung residue and sludge pretreatment module, a waste plastic pretreatment module, a waste cloth and leather pretreatment module, a landscaping pretreatment module and a granulation module; the kitchen waste pretreatment module is used for pulping, flocculating, conditioning and dehydrating kitchen waste to obtain a first solid product with reduced quantity, harmlessness and stabilization, the excrement residue and sludge pretreatment module is used for flocculating, conditioning and dehydrating excrement residue and sludge to obtain a second solid product, and the waste plastic pretreatment module is used for chopping waste plastic to obtain a broken plastic block; the waste cloth leather pretreatment module is used for crushing waste cloth leather to obtain broken pieces of the waste cloth leather; the landscaping pretreatment module is used for sorting, crushing and drying landscaping waste to obtain crushed dry waste; and the granulation module is used for respectively carrying out independent granulation and/or proportionally mixing granulation on the first solid product, the second solid product, the broken plastic blocks, the broken waste cloth leather blocks and the crushed dry waste to obtain the granular environment-friendly fuel. Therefore, this application all has corresponding treatment mode to the solid useless treatment of the city of a great variety and makes the solid useless treatment effect that realizes minimizing, innoxious, stabilization of city, and can unify the result that obtains after handling admittedly useless and granulate through the granulation module, environmental protection fuel with flammability has been obtained, the environmental protection fuel that this application provided accords with the burning standard, can replace fossil fuel and get into biomass boiler and burn, thereby also improved discarded object reuse rate, thereby, this application has solved prior art and still has very big defect to the processing of the solid useless of the city of a great variety, the solid useless treatment of city is difficult to do the technical problem of "three change" principle.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below.

FIG. 1 is a block diagram of a municipal solid waste co-processing system provided by the present application;

FIG. 2 is a schematic flow diagram of a fecal sewage sludge and sludge pretreatment module provided in an embodiment of the present application;

FIG. 3 is a schematic flow chart of a kitchen waste pretreatment module according to an embodiment of the present disclosure;

FIG. 4 is a schematic flow diagram of a waste plastic pretreatment module provided in an embodiment of the present application;

FIG. 5 is a schematic flow diagram of a waste cloth and leather pre-treatment module provided in an embodiment of the present application;

fig. 6 is a schematic flow chart of the landscaping waste pretreatment module according to the embodiment of the present application.

Detailed Description

The application provides a city solid waste cooperative processing system, which is used for solving the technical defects in the prior art.

The technical solutions in the embodiments of the present application will be described clearly and completely below, and it should be understood that the described embodiments are only a part of the embodiments of the present application, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

For convenience of understanding, please refer to fig. 1, where fig. 1 is a structural diagram of a municipal solid waste co-processing system provided in the present application, and the present application provides a first embodiment of the municipal solid waste co-processing system, which includes:

the system comprises a kitchen waste pretreatment module, a dung residue and sludge pretreatment module, a waste plastic pretreatment module, a waste cloth and leather pretreatment module, a landscaping pretreatment module and a granulation module;

and the granulation module is used for respectively carrying out independent granulation and/or proportionally mixing granulation on the first solid product, the second solid product, the broken plastic blocks, the broken waste cloth leather blocks and the crushed dry waste to obtain the granular environment-friendly fuel.

The kitchen waste pretreatment module realizes slurrying, flocculation, conditioning and dehydration treatment of kitchen waste through a kitchen waste treatment device, a reactor, a conditioning tank, a filter press and a dryer, the kitchen waste treatment device, the reactor, the conditioning tank, the filter press and the dryer are sequentially connected through a first transmission mechanism, automation of kitchen waste treatment is realized, treatment efficiency is improved, the kitchen waste is slurried and converted into slurry, subsequent treatment is facilitated, flocculation is performed on the kitchen waste, flocs are more easily formed in the slurry of the kitchen waste and sterilized in the slurry, quick settlement of the kitchen waste is promoted, heavy metal substances in the kitchen waste are flocculated, the heavy metal substances are precipitated, secondary pollution to the environment caused by liberation of heavy metal ions in the slurry of the kitchen waste is reduced through conditioning, the water in the kitchen waste slurry is removed during the dehydration treatment, thereby forming a first solid product which is pollution-free, stable and combustible. The kitchen waste used in the application is a general name of residual food discarded by units such as restaurants, dining rooms, hotels, restaurants, dining rooms, enterprises and public institutions, dining halls and the like in residential families and catering industry, and mainly comprises rice and flour food residues, vegetables, vegetable oil, animal oil, meat bones, fish bones and the like. The chemical components mainly comprise starch, cellulose, protein, lipid, inorganic salt and the like.

The fecal sewage and sludge pretreatment module realizes flocculation, conditioning and dehydration treatment on fecal sewage and sludge through the reactor, the conditioning tank, the filter press and the dryer, and the reactor, the conditioning tank, the filter press and the dryer are sequentially connected through the first transmission mechanism, so that the automatic treatment of fecal sewage and sludge is realized, and the treatment efficiency is improved; the method is characterized in that the fecal residues and the sludge are flocculated, so that heavy metal substances in the fecal residues and the sludge form floccules and are sterilized at the same time, the heavy metal substances are precipitated, the secondary pollution to the environment caused by the dissociation of heavy metal ions in the fecal residues and sludge slurry is reduced by conditioning, and the moisture in the fecal residues and the sludge is removed by dehydration treatment, so that a second solid product which is pollution-free, stable and combustible is obtained.

Waste plastics preliminary treatment module passes through the plastics breaker and realizes shredding waste plastics, obtains the broken plastics piece, and the broken plastics piece is stored through the broken plastics storehouse, is connected through second transmission device between broken plastics storehouse and plastics breaker for in transmitting the broken plastics piece to the broken plastics storehouse from the plastics breaker, thereby realize automatic processing, improved treatment effeciency.

The waste cloth leather pretreatment module realizes the chopping of waste cloth leather through the cloth crusher to obtain waste cloth leather fragments, and the waste cloth leather fragments are stored through the cloth chopping bin and are sequentially connected through the third transmission mechanism between the cloth crusher and the cloth chopping bin in sequence for transmitting the waste cloth leather fragments to the cloth chopping bin from the cloth crusher, so that the automatic treatment is realized, and the treatment efficiency is improved.

Afforestation waste disposal module passes through sorting unit, rubbing crusher, the drying-machine realizes sorting, smashing and drying to the afforestation discarded object, obtains the dry discarded object of comminuted to store the dry discarded object of comminuted through the material storehouse, connect gradually the order through fourth transmission device between sorting unit, rubbing crusher, drying-machine and material storehouse, realize the automation of afforestation discarded object, improve the treatment effeciency.

The granulation module is respectively connected with the kitchen waste pretreatment module, the excrement residue and sludge pretreatment module, the waste plastic pretreatment module, the waste cloth and leather pretreatment module and the landscaping waste pretreatment module through the first transmission mechanism, the second transmission mechanism, the third transmission mechanism and the fourth transmission mechanism, so that a product manufactured by the five modules is transmitted to the granulation module through the corresponding transmission mechanisms for granulation, and granular environment-friendly fuel is manufactured.

Referring to fig. 2, fig. 2 is a schematic flow chart of a fecal sewage and sludge pretreatment module provided in the embodiment of the present application, and as a further improvement, the fecal sewage and sludge pretreatment module provided in the embodiment of the present application is specifically configured to:

the method comprises the steps of mixing and reacting the excrement residue slurry, the sludge and the flocculating agent in a reactor, wherein a stirring mechanism and an additive feeding mechanism are arranged in the reactor, the flocculating agent is fed through the additive feeding mechanism, the feeding amount is controlled, the flocculating agent is uniformly mixed with the excrement residue slurry and the sludge through the stirring mechanism after being fed to obtain a first reaction liquid, at the moment, the excrement residue and heavy metal substances in the first reaction liquid form a floccule through flocculation and sterilization of the flocculating agent, and the heavy metal substances are precipitated.

The excrement sediment thick liquid and the mud of preliminary treatment in this application, transmit to the reaction storehouse of reactor in through first transmission device, need not artifical transport, the foul smell of having avoided staff's contact excrement sediment and avoided receiving its pollution, the conveying efficiency has been improved simultaneously, the source of excrement sediment thick liquid can be for poultry excrement sediment in this application, human excrement sediment etc. the excrement sediment thick liquid is its collective name, mainly contain moisture content in the excrement sediment thick liquid, inorganic salt, fat, material such as organic matter, mud can be the mud that sewage treatment plant produced, also can be sedimentary mud such as rivers or lakes, the water content more than or equal to 98% of the mud that this application used.

The acid-base regulator is citric acid monohydrate or tartaric acid, preferably citric acid monohydrate, and the pH of the first reaction liquid is 4-7, preferably 5, through the regulation of the citric acid monohydrate. The acid-base regulator is regulated in the reactor and then is uniformly stirred by a stirring mechanism in the reactor, and the acid-base regulator is stored in a feeding mechanism of the reactor.

102, transmitting a first reaction liquid in a reactor to a conditioning pool through a transmission mechanism;

it should be noted that, the first transmission mechanism is automatically controlled by the control system, the type of the first transmission mechanism may be a conveyor belt transmission mechanism or a conveyor roller transmission mechanism, and a sensor is disposed in the conditioning tank, and when the first reaction liquid is transmitted to the lower side of the conditioning tank, the sensor identifies the first reaction liquid and controls the conditioning tank to execute a corresponding conditioning step.

103, mixing the first reaction liquid and the modified stabilizer in a conditioning tank to obtain a second reaction liquid;

the modification stabilizer is used for crystallizing heavy metal ions in the first reaction liquid to form a stable water-insoluble crystal structure, reducing secondary pollution caused by dissociation of the heavy metal ions, and facilitating degradation of organic matters and reduction of odor concentration, the modification stabilizer is arranged in a feeding mechanism of a conditioning tank, the modification stabilizer is fed into the first reaction liquid by controlling the feeding mechanism, and the first reaction liquid and the modification stabilizer are fully stirred by a stirring mechanism, so that a second reaction liquid is obtained.

It is to be noted that the water in the second reaction solution is removed by dehydration treatment, the sewage obtained after dehydration treatment is transferred to a sewage storage tank through a pipeline, when the sewage in the sewage storage tank reaches a certain amount, the sewage is transmitted to a sewage treatment system through a pipeline for treatment, the second reaction liquid is dehydrated to finally obtain a second solid product, after a series of treatments such as sterilization, deodorization, flocculation, heavy metal removal and the like are carried out on the second solid product in the steps, the pollution of the second solid product is greatly reduced, and the second solid product is tested by experiments, the heat value of the second solid product is 2000-4000 kCal/kg, thereby being capable of being used as environment-friendly fuel to replace fossil fuel to enter a biomass boiler for combustion, optimizing the treatment of the manure and the slag, the problem of energy shortage is also solved, waste is changed into valuable, and the energy reutilization rate is improved.

In the fecal sewage and sludge pretreatment module provided by this embodiment, fecal sewage slurry, sludge and an acid-base modifier are mixed in a reactor, the pH of the reactor is adjusted to stabilize the pH to a neutral meta-acid, and a flocculant is mixed to flocculate, precipitate and sterilize heavy metals and other substances in the fecal sewage slurry, so that the fecal sewage is easier to form flocs, and rapid sedimentation of the fecal sewage is promoted; the first reaction liquid in the reactor is transmitted to a conditioning tank through a first transmission mechanism, and the first reaction liquid and a modified stabilizer are mixed in the conditioning tank, so that the heavy metal ions in the first reaction liquid are crystallized by the modified stabilizer to form a stable water-insoluble crystal structure, and secondary pollution caused by the dissociation of the heavy metal ions is reduced, and a second reaction liquid is obtained; dehydrating the second reaction liquid in a dehydrating device to reduce the water content of the second reaction liquid to 10-15% to form a second solid product, wherein the second solid product is a combustible fecal residue fuel; therefore, after a series of treatments of sterilization, sulfur fixation, heavy metal removal, dehydration, drying, granulation and the like, the fecal residue slurry and the sludge achieve the treatment effects of reduction, harmlessness, stabilization and recycling, and finally the obtained combustible particles are obtained; the first reaction liquid in the reactor is transmitted to the conditioning tank by the first transmission mechanism, so that the transmission efficiency is higher, and the treatment efficiency of the manure is improved. This application has been solved present excrement sediment clearly and has been drawn and lack special treatment mode, and the part is drawn the dung-cart driver and is emptyd it at will and handle, seriously influences urban environment health and drinks quality of water, causes secondary pollution's technical problem.

In another embodiment, as a further improvement, the fecal sewage treatment module provided in the embodiment of the present application specifically includes:

specifically, a deodorization device is arranged in the reactor and used for carrying out deodorization treatment on the inside of the reactor. Deodorizing device can be for having the deodorizing device of conventional use, and is concrete, and this application provides specific deodorization equipment, and the deodorization equipment that this application used includes alkali spray column and biological deodorization tower, the alkali spray column with biological deodorization tower connects, deodorization equipment's gas vent and atmosphere intercommunication, the abandonment and the polluted gas of the deodorization equipment of this application discharge in the high altitude.

Wherein, the preferable pH regulator is citric acid monohydrate, the addition amount of the citric acid monohydrate is 0.002 g/kg.DS-0.004 g/kg.DS, and the pH of the first reaction solution is adjusted to about 5; the flocculating agent is preferably an aluminum salt, and specifically can be polymeric ferric aluminum sulfate PAFCS and/or polyacrylamide PAM, the addition amount of the polymeric ferric aluminum sulfate PAFCS is 1.0-1.5mg/kg.DS, the addition amount of the polyacrylamide PAM is 0.005-0.01L/kg.DS, wherein DS is the weight of the oven-dried sludge, and of course, the flocculating agent can also be alum, and the addition amount of the alum can be 1.0-1.5 mg/kg.DS. The polymeric ferric aluminum sulfate PAFCS, the polyacrylamide PAM and the alum can be added in various ways, and can be added singly or in a mixed manner. The treatment of the fecal sludge slurry and sludge with the three flocculants added in different ways under the same conditions is shown in table 1.

TABLE 1

Wherein, the odor intensity: grade 0 is odorless; grade 1 is barely sensed as odor (detection threshold); grade 2 is weaker odor (cognitive threshold) which can determine the nature of the odor; grade 3 is that obvious smell is easily smelled; grade 4 is a strong odor; grade 5 is a strong odor. When the strength of the malodor exceeds level 3, it is considered that the atmosphere has been contaminated with the malodor.

Under the same conditions, the treatment effects of the three flocculants on the fecal sewage sludge slurry and the sludge in different adding modes are shown in the table 2.

TABLE 2

As can be seen from table 1, under the same conditions, when the polymeric ferric aluminum sulfate pamcs, the polyacrylamide PAM and the alum are used alone, the deodorizing effect of the polymeric ferric aluminum sulfate pamcs is obviously better than that of the polyacrylamide PAM and the alum; compared with the single use of the polymeric ferric aluminum sulfate PAFCS, the deodorization effect of the mixture of different flocculants is not better than that of the single use of the polymeric ferric aluminum sulfate PAFCS.

As is clear from table 2, the effect of treating the feces by the polymeric ferric aluminum sulfate PAFCS was excellent in terms of the settling rate, the state of alum floc, the water content of the cake and the target product, and the calorific value of the target product under the same conditions.

Therefore, the polymeric ferric aluminum sulfate PAFCS has relatively good treatment indexes, particularly has high settling speed, large alum floc size and better dewatering effect in the aspect of deodorization, and the polymeric ferric aluminum sulfate PAFCS is preferably used as the flocculating agent.

102, conveying a first reaction liquid in a reactor to a conditioning tank through a first conveying mechanism;

specifically, a deodorization device is arranged in the conditioning tank and used for performing deodorization treatment on the interior of the conditioning tank, and the deodorization device is the same as the deodorization device.

Wherein the modified stabilizer is calcium oxide, the addition amount of the calcium oxide is 0.05-0.2kg/kg.DS, so as to obtain a second reaction liquid, deodorization equipment is arranged in the conditioning pool, and after the second reaction liquid is prepared, the second reaction liquid is deodorized by the deodorization equipment.

Specifically, the dehydration device comprises a filter press and a dryer, wherein the filter press is used for deeply dehydrating the second reaction liquid to reduce the water content of the second reaction liquid to about 50% so as to obtain a slurry mud cake, and the dryer is used for drying the slurry mud cake treated by the filter press so as to obtain a powdery second solid product with the water content of about 15%. The filter press is provided with a filtrate collector for collecting a byproduct, namely filter-pressing sewage, obtained by treatment, the filtrate collector is connected with the sewage treatment system and is used for transmitting the sewage into the sewage treatment system for treatment, the sewage can be directly treated by the sewage treatment system and then discharged, and the treatment process is simpler than that of solid waste. All be provided with deodorizing device in pressure filter and desiccator, deodorizing device is used for carrying out the deodorization to inside and the desiccator of pressure filter, still be provided with dust collector inside dehydrating unit, this dust collector specifically is inside being located the desiccator, dust collector is used for removing dust the processing to dehydrating unit inside, dust collector can be for the dust collector of current conventional use, and is concrete, this application provides two kinds of dust collector, first dust collector includes nanometer dust remover and spray column, nanometer dust remover and spray column are connected, dust collector's gas vent and atmosphere intercommunication, the dust collector's of this application abandonment and polluted gas discharge in the high altitude. The second dust collector comprises an air-cooled dust collector and a spray tower, the air-cooled dust collector is connected with the spray tower, an exhaust port of the dust collector is communicated with the atmosphere, and waste and polluted gas of the dust collector is discharged at high altitude.

And after a second solid product is obtained, granulating the second solid product in a granulating module to obtain the granular environment-friendly fuel prepared from the manure and the sludge.

Specifically, the dust removal device is arranged in the granulation module, and experiments show that the obtained granular environment-friendly fuel has a heat value of 2000-4000 kCal/kg, a carbon content of about 33% and a sulfur content of about 0.4%, and belongs to the category of low-sulfur coal, so that the granular environment-friendly fuel prepared from the excrement slag and the sludge in the embodiment has environmental protection and flammability.

Referring to fig. 3, fig. 3 is a schematic flow chart of a kitchen waste pretreatment module according to an embodiment of the present application, and as a further improvement, the kitchen waste pretreatment module provided in the present application is specifically configured to:

specifically, in step 201, kitchen waste is conveyed to a hopper through a bucket elevator, and a scattering machine is installed at the lower part of the hopper; the outlet of the breaker is connected with a vibrating screen through a blanking pipe, a magnetic separator is arranged above the vibrating screen, and large-particle materials which do not pass through the vibrating screen are mixed with liquid and small-particle materials which directly pass through the vibrating screen after passing through a shredder and then enter a roller press; the outlet of the roller press is sequentially connected with the blade type cutting machine and the liquid storage tank through a blanking pipe, the stirrer is arranged in the liquid storage tank, the bottom of the liquid storage tank is connected with the slurry pump, and kitchen waste slurry is conveyed to the reactor through the slurry pump to obtain kitchen waste slurry.

preferably, the pH regulator is selected from citric acid monohydrate and/or tartaric acid,

preferably, in step 202, the first reagent is selected from one or more of polyaluminum chloride PAC, polyaluminum silicate PSAA, and alum.

Preferably, in step 202, the amount of polyaluminum chloride added is 0.5-1.0 mg/kg.DS; the addition amount of the aluminum polysilicate is 1.0-1.5 mg/kg.DS; the addition amount of alum is 1.0-1.5 mg/kg.DS; the addition amount of polyacrylamide is 0.5-1.0mg/kg.

More preferably, in step 202, the first reagent is selected from polyaluminium silicate sulfate (PSAA), polyaluminium silicate sulfate (PSAA) and Polyacrylamide (PAM) with good use effect; the addition amount of the polyaluminium silicate PSAA is 1.0-1.5 mg/kg.DS; the addition amount of polyacrylamide PAM is 0.5-1.0mg/kg.

Wherein, in step 202, DS is the weight of the absolutely dry sludge in step 202.

Step 202, specifically, kitchen waste slurry and sludge are conveyed into a reactor through a first conveying mechanism, citric acid monohydrate is added to prepare a mixture, and the pH value of the mixture is adjusted to be about 5; and then adding a first reagent and polyacrylamide, and uniformly stirring by a stirring blade to obtain first mixed slurry, wherein the pH value of the first mixed slurry is 5. Here, the weight ratio of the kitchen waste slurry to the sludge was 1:1, and the addition of the first reagent was as shown in table 3, to obtain 7 different kinds of first mixed slurries (respectively denoted as product 1 to product 7).

TABLE 3

Step 203, mixing the first mixed slurry with a second reagent to obtain second mixed slurry;

the second agent is selected from calcium oxide and/or cement kiln dust, and is preferably calcium oxide.

Step 203 specifically is to convey the seven first mixed slurries of step 202 to a conditioning tank, add calcium oxide into the conditioning tank, and mix, wherein the adding amount of the calcium oxide is 0.1kg/kg.

The dehydration treatment comprises mechanical dehydration and drying dehydration, wherein the mechanical dehydration is deep dehydration carried out by a filter press, a mixed slurry mud cake is obtained after the deep dehydration, the water content of a product obtained after the mechanical dehydration is lower than 50%, the drying dehydration is heating drying, the environment-friendly fuel obtained after the drying dehydration is powdery, and the water content of a first solid product obtained after the drying is 10-15% and powdery.

Step 204 specifically, the seven second mixed slurry obtained in step 203 is respectively conveyed into a filter press by using a high-pressure plunger pump to be deeply dehydrated, and the water content is reduced to about 50%; seven kinds of mixed slurry mud cakes are obtained after deep dehydration and stored in a storage bin, a conveyor is arranged below the storage bin, and the seven kinds of mixed slurry mud cakes are respectively marked as mud cakes 1-7. Meanwhile, the hydraulic filtration water of the mixed slurry is obtained in the filter pressing process and is respectively marked as filter pressing water 1-filter pressing water 7, seven kinds of mixed mud cakes are respectively conveyed and crushed to enter drying equipment for drying, and the water content of the dried first solid product is about 15%.

And after the step 204, granulating the obtained first solid product by a granulating module to obtain seven granular environment-friendly fuels which are respectively marked as products 1 to 7.

Seven products 1, filter pressing water 1, mud cakes 1 and products 1 correspond one to one, products 2, filter pressing water 2, mud cakes 2 and products 2 correspond one to one, and so on.

In this example, the suspended solids SS and the chemical oxygen demand COD of the press filtration water 1 to the press filtration water 7 were measured_CrThe results of the removal of oil removal rate and color are shown in Table 4.

TABLE 4

The physical parameters of the state of alum flocs and the sedimentation rate of 7 different types of first mixed slurries (respectively designated as products 1 to 7) in example 1 were measured, and the results are shown in table 5.

TABLE 5

Marking	State of alumen ustum	Settling velocity
			Product 1	Large size and loose	Fast-acting toy
Product 2	Large size and loose	Fast-acting toy
			Product 3	Small size and loose	Slow
Product 4	Large size and loose	Fast-acting toy
			Product 5	Large size and loose	Is quicker
Product 6	Large size and compactness	Is quicker
			Product 7	Large size and compactness	Is quicker

The water content of the mudcakes 1 to 7 in example 1 was measured, and the results are shown in table 6.

TABLE 6

Marking	Mud cake moisture content (%)
		Mud cake 1	50.25
Mud cake 2	45.87
		Mud cake 3	66.09
Mud cake 4	45.83
		Mud cake 5	56.42
Mud cake 6	53.37
		Mud cake 7	49.07

The water content and calorific value data of the products 1 to 7 were measured, and the results are shown in table 7.

TABLE 7

Marking	Moisture content (%) of the objective product	Target product calorific value (kCal/kg)
			Product 1	12.08	1016.32
Product 2	11.16	2328.56
			Product 3	23.05	1509.35
Product 4	11.33	2448.15
			Product 5	20.26	1020.60
Product 6	18.45	2183.19
			Product 7	18.31	2301.42

As can be seen from tables 4 to 6, under the same conditions, when PAC, PSAA and alum are used independently, the treatment effect of PSAA is obviously better than that of PAC and alum, especially, the removal rate of oil is more prominent, and the oil removal rate can reach 97.3%; compared with the single use of PSAA, the mixed use of PAC, PSAA and alum has no obvious improvement on each index.

As is clear from tables 5 to 7, under the same conditions, the effect of PSAA on the treatment of mixed sludge of kitchen wastes is excellent in terms of settling rate, alumen ustum state, water content of cake and target product, and calorific value of target product. Wherein, the product 4 made when PAC is mixed with PSAA has the highest calorific value, the product 2 made when PSAA is used alone is the next, and the product 7 made when PAC, PSAA and alum are mixed.

Therefore, for the sake of completeness, the mixing ratio of the first reagent is readjusted in step 202, which is selected from 1.0mg/kg.ds PSAA and 0.5mg/kg.ds PAM, and after granulation in steps 203 and 204 and finally the granulation module, the first solid product is labeled as product 8, and the calorific value parameter of product 8 is shown in table 8.

TABLE 8

Marking	Target product calorific value (kCal/kg)
		Product 8	2328.56

The carbon and sulfur contents of product 8 are compared to the carbon and sulfur contents of the coal as shown in table 9.

TABLE 9

Marking	Carbon content (%)	Sulfur content (%)
			Product 8	32.35	0.38
Coal and its production method	50～98	0.1～10

As can be seen from the comparison between tables 8 and 9, the product 8 has a higher calorific value and a lower carbon content than that of coal, and the sulfur content of the product 8 falls within the range of low-sulfur coal, so that the granulated eco-friendly fuel produced by the granulation module using the first solid product provided by the present application has combustibility and environmental friendliness.

Referring to fig. 4, fig. 4 is a schematic flow chart of a waste plastic pretreatment module provided in the embodiment of the present application, and as a further improvement, the waste plastic pretreatment module provided in the embodiment of the present application is specifically configured to:

step 302, storing the shredded plastic pieces in a shredded plastic bin.

Particularly, the discharge end of waste plastics pretreatment module is the discharge end in garrulous plastics storehouse, the discharge end in plastics breaker and the feed end in garrulous plastics storehouse have been connected to the transmission band of second transport mechanism, be used for transmitting the waste plastics through plastics breaker shredding to garrulous plastics storehouse in and save, the granulation module can directly acquire garrulous plastics from the plastics breaker, also can acquire garrulous plastics from garrulous plastics storehouse, carry out the granulation through the granulation module to garrulous plastics, and mix in proportion with mud, excrement sediment, kitchen garbage etc. to make granular environmental protection fuel.

Referring to fig. 5, fig. 5 is a schematic flow chart of the waste cloth leather pretreatment module according to the embodiment of the present application, and as a further improvement, the waste cloth leather pretreatment module according to the embodiment of the present application is specifically configured to:

step 402, storing the pieces of the waste cloth leather in a cloth shredding bin.

Particularly, the discharge end of the waste cloth leather pretreatment module is the discharge end of the cloth crusher, and the transmission belt of the third transmission mechanism is connected with the discharge end of the cloth crusher and the feed end of the broken plastic bin and used for transmitting the waste cloth leather cut by the cloth crusher to the broken cloth bin for storage. The granulation module can directly obtain the waste cloth leather fragments from the cloth crusher through the third transmission mechanism, also can obtain the waste cloth leather fragments from the cloth crushing bin, and mixes the waste cloth leather fragments with sludge, excrement residues, kitchen garbage and the like in proportion to prepare granular environment-friendly fuel.

Referring to fig. 6, fig. 6 is a schematic flow chart of the landscaping waste pretreatment module provided in the embodiment of the present application, and as a further improvement, the landscaping waste pretreatment module provided in the embodiment of the present application is specifically configured to:

step 502, the dry waste and the wet waste are crushed in a crusher to obtain crushed dry waste and crushed wet waste.

step 504, storing the pulverized dry waste in a material bin.

Particularly, sorting equipment is arranged in the sorting device and used for sorting out dry waste and wet waste in garden waste, the pulverizer is used for pulverizing the dry waste and the wet waste respectively, the dryer is used for drying the wet waste to obtain pulverized dry waste, and the garden greening waste bin is used for storing the pulverized dry waste; the discharge end of afforestation discarded object preliminary treatment module is the discharge end in afforestation discarded material storehouse, sorting unit's discharge end and the feed end of rubbing crusher have been connected to fourth transport mechanism's transmission band, the discharge end of rubbing crusher and the feed end of drying-machine, the discharge end of drying-machine and the feed end in afforestation discarded material storehouse, but make afforestation discarded object preliminary treatment module full-automatic processing afforestation discarded object through fourth transport mechanism, the treatment effeciency has been improved. The granulation module obtains the dry waste of comminuted form from the material storehouse through fourth transport mechanism to carry out proportional mixing with mud, excrement sediment, kitchen garbage etc. to make granular environmental protection fuel, wherein, all be provided with dust collector in sorting unit, the rubbing crusher drying-machine and the material storehouse, this dust collector is the same with foretell dust collector structure.

The foregoing is only a preferred embodiment of the present application and it should be noted that those skilled in the art can make several improvements and modifications without departing from the principle of the present application, and these improvements and modifications should also be considered as the protection scope of the present application.

Claims

1. A municipal solid waste co-processing system is characterized by comprising: the system comprises a kitchen waste pretreatment module, a dung residue and sludge pretreatment module, a waste plastic pretreatment module, a waste cloth and leather pretreatment module, a landscaping pretreatment module and a granulation module;

2. The municipal solid waste co-processing system according to claim 1, wherein the manure and sludge pre-processing module is specifically configured to:

3. The municipal solid waste co-processing system according to claim 1, wherein the kitchen waste pre-processing module is specifically configured to:

4. The municipal solid waste co-processing system according to claim 1, wherein the waste plastic pre-processing module is specifically configured to:

step 302, storing the shredded plastic pieces in a shredded plastic bin.

5. The municipal solid waste co-processing system according to claim 1, wherein the waste cloth leather pre-processing module is configured to:

and 402, storing the waste cloth leather fragments in a cloth crushing bin.

6. The municipal solid waste co-processing system according to claim 1, wherein the landscaping waste pre-processing module is specifically configured to:

step 502, crushing the dry waste and the wet waste in a crusher to obtain crushed dry waste and crushed wet waste;

and 504, storing the crushed dry waste in a material bin.

7. The municipal solid waste co-processing system according to claim 3, wherein said first reagent is selected from one or more of polyaluminium chloride, polyaluminium silicate and alum.

8. The municipal solid waste co-processing system according to claim 2, wherein said flocculant is polyaluminum ferric sulfate (PAFCS) and/or Polyacrylamide (PAM).

9. The municipal solid waste co-processing system according to claim 2,

the step 101 further comprises: deodorizing the interior of the reactor;

10. The municipal solid waste co-processing system according to claim 2, wherein said modifying stabilizer is calcium oxide.