CN112097263A

CN112097263A - Mixed household garbage sorting harmless treatment system

Info

Publication number: CN112097263A
Application number: CN202011054286.3A
Authority: CN
Inventors: 王连; 王文静; 边志敏
Original assignee: Tangshan Yizhong Waste Treatment Co ltd
Current assignee: Tangshan Yizhong Waste Treatment Co ltd
Priority date: 2020-09-29
Filing date: 2020-09-29
Publication date: 2020-12-18

Abstract

The invention discloses a mixed household garbage sorting harmless treatment system, which comprises a garbage pretreatment system, a bag breaking system, a garbage sorting treatment system and a deodorization system; the garbage sorting treatment system comprises a sorting machine for separating dry garbage from wet garbage, the dry garbage is combusted through a household garbage incineration system, then the smoke is purified through a smoke purification treatment system and discharged into the air, the wet garbage is fermented through a garbage fermentation system, the fermented garbage is fermented through an anaerobic fermentation tank to form combustible gas and biogas residue and biogas slurry, the biogas residue is used as field fertilizer, and the biogas slurry is used for irrigating flowers; in the deodorization system, odor is collected and purified and discharged. According to the invention, after the garbage is classified, the reduction can be realized by burning non-organic garbage, the organic garbage can be completely recycled, the harmless treatment and resource reutilization of the household garbage are really realized, the indoor environment can be cleaner by the multi-stage deodorization device, and the multi-stage deodorization device is suitable for all household garbage treatment systems.

Description

Mixed household garbage sorting harmless treatment system

Technical Field

The invention belongs to the technical field of garbage treatment, and relates to a household garbage treatment system, in particular to a mixed household garbage sorting harmless treatment system.

Background

With the rapid development of urban construction and new rural construction in China, the yield of household garbage is increasing day by day, and how to carry out harmless treatment on the garbage is particularly important. The method for treating domestic garbage in the prior art mainly comprises two methods, one method is a stack retting water spraying method, water is directly sprayed on a garbage stack during garbage treatment, organic water is sprayed to the top of the garbage to carry out anaerobic fermentation, the fermented water is sprayed on the top of the garbage again to pass through a garbage layer to dissolve organic matters, then the anaerobic fermentation is carried out, the steps are repeated, the organic matters in the garbage are dissolved out, and corresponding resources are recycled after the fermentation. However, the drawbacks of this treatment process are: the cycle is too long, the occupied garbage stacking space is too large, the treatment efficiency is low, and the odor is large. The second is door-type anaerobism dry fermentation method, the rubbish that will collect is directly placed on the delivery wagon, pushes away in the door-type fermentor, closes the feed inlet, directly spouts the zymotic fluid that contains the anaerobe bacterial in the delivery wagon top, sprays the rubbish of dress on the delivery wagon repeatedly, dissolves fermentable organic matter, until the stability that rubbish becomes, drags out the delivery wagon that will hold rubbish, gets into the secondary cycle, so relapse. The drawbacks of this treatment process are: the gate-type anaerobic fermentor has poor sealing performance, fermented methane is easy to leak, and the risk coefficient in the treatment process is large. In the two garbage treatment methods, organic garbage in the garbage is subjected to fermentation harmless treatment, fermented biogas residues and biogas slurry are not reused and are directly accumulated or buried, and some non-organic garbage needs to be treated by incineration.

In the prior art, flue gas generated in the waste incineration process contains a large amount of harmful gas, particularly dioxin, a highly toxic carcinogen, and if the flue gas generated in the waste incineration process is directly discharged into the air, the atmospheric environment is polluted, and the health of human beings is threatened, so that the flue gas generated in the waste incineration process needs to be subjected to harmless treatment. In the prior art, the garbage is incinerated and discharged into the air after being purified by quenching, desulfurization, cloth bag dust removal and the like so as to reduce the content of harmful gases in flue gas and finally achieve the purpose of reducing and harmlessly treating domestic garbage.

In the prior art, the generation of dioxin is controlled by adopting modes such as pyrolysis gasification incineration or two-stage incineration, copper oxidation control, peroxide high-temperature complete combustion in a secondary combustion chamber and the like, but the modes can not reduce the dioxin in the flue gas to less or completely eliminate the dioxin. With the continuous improvement of the catalytic technology, the decomposition catalytic technology in the household garbage incineration flue gas treatment system is gradually mature and applied. However, the catalytic method has strict requirements on conditions and strict limitations on the temperature, humidity and dust content of the flue gas, and the conventional equipment generally needs to be provided with an electric auxiliary heating device when the dioxin in the flue gas is catalytically decomposed, so that the equipment construction and operation costs are high, the catalytic decomposition effect on the dioxin is not obvious, and the flue gas is difficult to purify to the national emission standard. Therefore, in the existing household garbage incineration flue gas treatment system, the amount of dioxin specially treated by adopting a catalyst method is small.

Meanwhile, domestic garbage in China is not strictly classified, particularly, in the garbage collection and transportation process, the garbage is mixed, centralized and stored, however, when the garbage is treated, dry garbage and wet garbage need to be sorted out to carry out different treatment processes, so that the resource is recycled. In the prior art, the classification of garbage mostly adopts manual sorting to sort out big plastic bottles or combustible garbage, but the smell in the garbage disposal plant is bad, and the operational environment is poor, and the garbage of handling daily is more, therefore work efficiency is low. Or adopt the manipulator to sort, but need set up a plurality of manipulators on a transfer chain, increased manufacturing cost to some rubbish can not disperse completely on the conveyer belt, and rubbish piles up together, can influence the discernment of manipulator, can not clear up the rubbish that needs the letter sorting completely thoroughly, has increased the difficulty for the processing of follow-up rubbish.

The deodorization system among the prior art forms the negative pressure in the factory building more, will give off the smell in the factory building and take away, but the problem of smell is not solved from the source to this kind of mode, and although the smell is less relatively outside the factory building, the smell in the factory building is still great, not only can make operational environment poor, still can incur more flies, has caused the pollution to the environment on every side.

Disclosure of Invention

In order to solve the defects in the prior art, the invention aims to provide a mixed domestic garbage sorting harmless treatment system, so as to supplement energy consumption through solar energy, ensure the energy conservation of the whole garbage treatment system and reduce the resource consumption; organic garbage is completely recycled, and after non-organic garbage is combusted and discharged, smoke is harmless and can reach the national discharge standard; the garbage is sorted cleanly, and the odor in the garbage treatment plant is small.

In order to achieve the purpose, the technical scheme adopted by the invention is as follows:

the garbage bag breaking and sorting device comprises a garbage pretreatment system, a bag breaking system, a garbage sorting system and a deodorization system which are sequentially connected through a conveying device and are arranged indoors;

the garbage pretreatment system comprises a conveying device and a rotary screen which is fixedly arranged on the conveying device and used for sorting soil and stones;

the garbage sorting treatment system comprises a sorting machine, a household garbage incineration system connected with a dry garbage outlet of the sorting machine, an air separation machine which is connected with a wet garbage outlet of the sorting machine through a conveying device and is used for separating paper scraps and organic garbage, a paper scrap collecting device connected with one outlet of the air separation machine, and a garbage fermentation system connected with the other outlet of the air separation machine;

the household garbage incineration system is connected with a flue gas purification treatment system through a pipeline, and the flue gas purification treatment system comprises a flue gas quenching tower, a bag-type dust remover, an activated carbon adsorption tower, a flue gas preheater and a dioxin catalytic decomposer which are sequentially connected through the pipeline; wherein, the flue gas preheater is arranged in a flue gas outlet of the household garbage incineration system;

the garbage fermentation system comprises a first crusher, a first stirring tank, a second crusher, a second stirring tank, a sewage pump, an anaerobic fermentation tank and a biogas cabinet for storing fermentation gas, wherein the first crusher, the first stirring tank, the second crusher, the second stirring tank, the sewage pump, the anaerobic fermentation tank and the biogas cabinet are sequentially connected with an outlet for discharging organic garbage through a conveying device and a winnower, a solid-liquid separator for separating biogas residues and biogas slurry is fixedly arranged on the anaerobic fermentation tank, and the anaerobic fermentation tank is connected with a solar panel and provides electric energy for the anaerobic fermentation tank;

the deodorization system comprises a gas collecting device, a fan used for enabling the gas collecting device to generate negative pressure, a sealing cover connected with the gas collecting device through a pipeline and used for sealing a conveying device, a garbage pretreatment system, a bag breaking system and a garbage sorting treatment system, an air suction cover connected with the fan through a pipeline and used for eliminating indoor odor, and a spraying device used for spraying deodorization liquid to the indoor space, wherein the gas collecting device is sequentially connected with a light hydrogen ion purifier and a deodorization tower through a pipeline.

As a limitation of the present invention: and a bag-type dust remover for removing dust is fixedly arranged on the conveying device of the garbage pretreatment system.

As a further limitation of the invention: and a dry garbage outlet and a wet garbage outlet of the separator are both connected with a demagnetization all-in-one machine.

As another limitation of the present invention: the household garbage incineration system comprises an incinerator body and a second combustion chamber which is arranged above the incinerator body and is in a net rack shape and used for storing heat; the lateral wall of the incinerator body is fixedly provided with a magnetizing device, and the bottom of the incinerator body is communicated with a hot air generating device through a primary hot air channel; at least one group of denitration liquid atomization devices are symmetrically arranged on the side wall of the incinerator body.

As a further limitation of the invention: the flue gas quenching tower comprises a quenching tower body, and a water spraying device, a mist condensing device, a dewatering device and a drainage device which are arranged in the quenching tower body; the water spraying device is arranged at a flue gas inlet at the top end of the quenching tower body; the mist condensing device is arranged at the upper position inside the quenching tower body and is positioned below the water spraying device; the dehydration device is arranged in the middle of the interior of the quench tower body and is positioned above the flue gas outlet; the drainage device is arranged at the bottom end of the quench tower body and is positioned below the flue gas outlet; be provided with import temperature sensor and export temperature sensor in the quench tower body, and import temperature sensor and export temperature sensor equally divide and do not be connected with the PLC controller electricity.

As still further limiting the invention: dioxin catalysis decomposes ware including dividing a ware casing and catalytic decomposition device, catalytic decomposition device locates inside dividing a ware casing, including three at least group catalytic module, every group catalytic module all includes through-hole board and catalyst filler, and every group catalytic module's top all is equipped with a filler door, the filler door is opened and is located on dividing a ware casing.

As a third limitation of the present invention: a flue gas desulfurization device is also arranged between the flue gas quenching tower and a bag-type dust collector in the flue gas purification treatment system; the flue gas desulfurization device comprises a desulfurizer atomization module and a flue gas dust removal module which are arranged on a communicating pipeline of the flue gas quench tower and the bag-type dust remover.

As a further limitation of the invention: and a flue heat exchanger is also arranged between the bag-type dust collector and the active carbon adsorption tower in the flue gas purification treatment system.

As still further limiting the invention: the spraying device is fixedly arranged at the top of the room and is a pipeline spraying device capable of generating spraying; the entrance of the entrance is provided with a wind mesh for preventing insects and flies from entering.

As a fourth limitation of the present invention: the methane cabinet is sequentially connected with a desulfurizing tower, a three-blade Roots blower, a methane hot water boiler and a heating system.

Due to the adoption of the technical scheme, compared with the prior art, the invention has the following beneficial effects:

(1) according to the invention, before the garbage is transported, the garbage is pretreated, soil blocks or sand stones in the garbage are sorted out, and equipment is prevented from being damaged when the garbage is crushed;

the method comprises the steps of separating dry garbage and wet garbage from the pretreated garbage under the action of a separator, burning the dry garbage, fermenting the wet garbage, reducing dust in flue gas generated by burning the dry garbage by adopting a bag-type dust collector and an active carbon adsorption tower, and enabling the temperature, the humidity and the dust content of the flue gas to reach the conditions limited by catalytic decomposition of dioxin, so that the defect that an electric auxiliary heating device needs to be arranged in the conventional equipment is overcome, the running cost of the equipment is reduced, the purification effect of harmful substances (particularly dioxin) in the flue gas is greatly improved, the flue gas is heated by a burning furnace before being discharged after a series of treatments, the temperature generated during burning is favorably heated, and the temperature of the flue gas is out of the temperature range for generating the dioxin, so that the generation of the dioxin can be effectively prevented, the temperature control is convenient, the waste of resources is avoided, and the reduction of the living garbage is realized, The harmless treatment is more efficient and clean, and the method is suitable for popularization and application;

the wet garbage is incompletely separated, so that light garbage such as paper scraps and plastic sheets and the like can be possibly remained, the garbage with light weight and the organic garbage capable of being fermented are separated by a winnowing machine, the garbage such as the paper scraps and the like can be recycled after being collected, the organic garbage realizes resource recycling through fermentation, the biogas residues and the biogas slurry are separated through a solid-liquid separator after being fermented, the biogas residues are used as organic fertilizers and are transported away by peasant households for trees and greening fertilizers, one part of the biogas slurry is used as a bacterial liquid to flow back to an anaerobic fermentation tank for recycling, the other part of the biogas slurry enters a sewage treatment station for treatment and purification and then is used as water for factory workshops, flowers and trees are sprayed with water, the organic garbage can be completely recycled, and no harmful substances can be generated;

the sealing cover seals the conveying device and other processing systems in the garbage transportation process, and the odor is absorbed into the gas collecting device through the pipeline for processing, so that each link in the garbage sorting process can prevent the odor from being emitted randomly, the odor emitted by the garbage before pretreatment is absorbed into the gas collecting device through the air suction cover in a garbage storage room, and meanwhile, the deodorizing liquid medicine is sprayed indoors, so that the generation of odor is reduced, the deodorizing efficiency is higher, and the garbage sorting environment is cleaner;

(2) the drum screen can sort out soil blocks or sand and stones in the garbage, so that equipment is prevented from being damaged in the subsequent process treatment process, and meanwhile, the bag-type dust remover is arranged, so that the generation of dust is prevented, the dust is reduced, and the garbage sorting environment is cleaner;

(3) the dry garbage outlet and the wet garbage outlet of the separator are respectively provided with the integrated demagnetizing machine, so that iron wires and other substances in the garbage can be screened out and recycled, and the garbage can be sorted and classified more thoroughly;

(4) the household garbage incineration system changes the combustion environment by arranging the magnetizer, reduces the influence of the moisture content on the garbage combustion by utilizing the hot air generating device and adopting a backflow hot air technology, and ensures the sufficiency and stability of the combustion; the device can stably increase the temperature of the hearth of the incinerator body to the upper limit of the limit temperature, ensure the sufficient combustion of the household garbage, reduce the content of harmful substances in ash slag and greatly improve the effect of reducing and disposing the household garbage; the secondary combustion chamber in the household garbage incineration system is of a net-rack-shaped heat storage structure, can be used for partitioning flue gas, is beneficial to secondary combustion of combustible components in the flue gas, and can effectively reduce the content of harmful substances in the flue gas;

(5) the denitration liquid atomization device is fixedly arranged on the incinerator body in the household garbage incineration system, denitration liquid can be sprayed when household garbage is incinerated, and harmful gas generation during household garbage incineration is reduced through high-temperature denitration reaction, so that the reduction of the emission of pollutants in smoke is facilitated; the flue gas quenching tower in the flue gas purification treatment system adopts a water-gas direct heat exchange mode, and the high-temperature flue gas is rapidly cooled to about 200 ℃ through direct heat exchange between water and the high-temperature flue gas, so that the synthesis path of dioxin substances in the flue gas cooling process can be effectively blocked; the device has good quenching effect, and can overcome the defects of slow quenching speed, easy adhesion of dirt on the inner wall of the flue gas quenching tower and equipment paralysis existing in the existing structure;

(6) the fog condensing device arranged in the flue gas quenching tower can condense steam formed after heat exchange between high-temperature flue gas and water flow into water drops again, and can reduce the humidity of the cooled flue gas; on the other hand, when the high-temperature flue gas enters the quench tower body, the mist condensation device can cause resistance to the flow of the high-temperature flue gas, so that the large-area high-temperature flue gas is divided into small-area high-temperature flue gas, and the cooling treatment is more suitable;

(7) the dehydration device arranged in the flue gas quenching tower can dehydrate the cooled flue gas, has high dehydration speed and high efficiency, and can effectively reduce the humidity of the flue gas; the flue gas after dehydration has higher cleaning degree, the workload of a device at the next stage can be reduced, and the flue gas is easier to treat;

(8) the dioxin catalytic decomposer in the flue gas purification treatment system is provided with at least three groups of catalytic modules, so that the substances such as carbon, hydrogen, nitrogen, carbon monoxide and the like in the flue gas can be sufficiently catalytically reduced, the emission of dioxin substances is further reduced to the maximum extent, and the safety of pollutant emission is improved;

(9) the decomposer shell in the dioxin catalytic decomposer is provided with the filler door, so that workers can conveniently overhaul the internal structure of the decomposer and can conveniently replace and fill the catalyst filler at regular intervals;

(10) the flue gas desulfurization device is arranged between the flue gas quench tower and the bag-type dust remover in the flue gas purification treatment system, so that most of sulfur dioxide in the flue gas can be removed, the concentration of the sulfur dioxide in the flue gas is effectively reduced, and the emission of harmful gases in the flue gas is further reduced;

(11) the flue gas dust removal module arranged in the flue gas desulfurization device can timely eliminate aerosol generated when flue gas reacts with a desulfurizer, and can effectively reduce the dust content in the flue gas by assisting the bag-type dust remover in removing dust from the flue gas;

(12) the flue heat exchanger arranged between the bag-type dust collector and the activated carbon adsorption tower in the flue gas purification treatment system can further cool the flue gas, and simultaneously remove most of moisture in the flue gas, so that the temperature and the humidity of the flue gas can reach the optimal adsorption conditions of the activated carbon adsorption tower, the adsorption efficiency of the activated carbon adsorption tower on organic matters in the flue gas is improved, and the aim of deeply purifying the flue gas is fulfilled;

(13) the spraying device is a pipeline spraying device and is fixed at the top of the room, so that the sprayed liquid medicine is in a mist shape, the deodorization effect is better, and the deodorization range is wider; the wind eyes on the door of the room can generate strong wind, so that insects and flies are effectively prevented from entering the room;

in conclusion, the garbage can be sorted and classified according to requirements in the sorting process, the resources can be recycled through different processes, the sealing cover can cut off odor from the source, the indoor environment can be cleaner through the multi-stage deodorization device, the reduction can be realized through non-organic garbage incineration, the flue gas after incineration is thoroughly purified, the organic garbage can be completely recycled, the harmless treatment and resource recycling of the household garbage are really achieved, the solar panel supplements the energy consumed by the whole system, the waste of the resources is reduced, and the garbage sorting device is suitable for all household garbage treatment systems.

Drawings

The invention is described in further detail below with reference to the figures and the embodiments.

FIG. 1 is a schematic front view of an embodiment of the present invention;

FIG. 2 is a schematic top view of an embodiment of the present invention;

FIG. 3 is a schematic structural diagram of a domestic waste incineration system 6 and a flue gas purification treatment system for flue gas treatment according to an embodiment of the present invention;

FIG. 4 is a schematic structural diagram of a household garbage incineration system 6 according to an embodiment of the present invention;

FIG. 5 is a schematic diagram showing the structure of a flue gas quenching tower 7 according to an embodiment of the present invention;

fig. 6 is a schematic structural view of dioxin catalytic decomposer 13 according to the embodiment of the present invention.

In the figure: 1-conveying device, 101-bracket, 102-conveying belt, 2-bag breaking machine, 31-sorting machine, 32-dry garbage outlet, 33-wet garbage outlet, 34-integrated demagnetizing machine, 4-winnowing machine, 5-conveying device, 6-household garbage incineration system, 601-incinerator body, 602-secondary combustion chamber, 603-primary hot air channel, 604-hot air generating device, 605-magnetizing device, 606-denitration liquid atomizing device, 607-garbage feeding machine, 608-fire observation door, 609-slag outlet door, 610-fire grate, 611-hearth temperature sensor, 7-flue gas quenching tower, 71-quenching tower body, 72-water spraying device, 73-mist condensing device, 74-dewatering device, 75-water discharging device, 76-inlet temperature sensor, 77-outlet temperature sensor, 78-bracket, 8-flue gas desulfurization device, 9-bag dust collector, 10-flue gas heat exchanger, 11-activated carbon adsorption tower, 12-flue gas preheater, 13-dioxin catalytic decomposer, 131-decomposer shell, 132-catalytic module, 133-through hole plate, 134-catalyst filler, 135-filler door, 136-shell bracket, 14-discharge cylinder, 15-induced draft fan, 16-rotary screen, 18-sealing cover, 19-pipeline, 20-gas collection device, 21-fan, 22-suction hood, 23-spraying device, 24-photohydrogen ion purifier, 25-deodorization tower, 26-air mesh, 27-first pulverizer, 28-a first stirring tank, 29-a scraper, 30-a second crusher, 31-a second stirring tank, 32-an anaerobic fermentation tank, 33-a solid-liquid separator, 34-a solar panel, 35-a biogas cabinet, 36-a desulfurizing tower, 37-a three-blade roots blower and 38-a biogas hot water boiler.

Detailed Description

Preferred embodiments of the present invention will be described below with reference to the accompanying drawings. It should be understood that the mixed domestic waste sorting innocent treatment system described herein is a preferred embodiment, is for illustration and explanation only, and is not to be construed as limiting the invention.

Embodiment mixed household garbage sorting harmless treatment system

In this embodiment, as shown in fig. 1 to fig. 6, a mixed domestic garbage sorting and harmless treatment system includes a garbage pretreatment system, a bag breaking system, a garbage sorting treatment system, and a deodorization system, which are sequentially connected through a conveying device 1 and are disposed in a room. The conveying device 1 adopts the prior art and comprises a bracket 101 for supporting and a conveying belt 102 rotatably arranged on the bracket 101, and when in transportation, garbage is conveyed on the conveying belt 102. The pretreatment system, the bag breaking system and the garbage sorting treatment system are subsystems erected on the conveying belt 102, and when the garbage on the conveying belt 102 is conveyed to each subsystem, the garbage is correspondingly treated. The garbage pretreatment system can clean up the soil and stones in the garbage, the bag breaking system breaks the massive garbage into small blocks, the garbage sorting treatment system is used for sorting out dry garbage and wet garbage, the particle size is smaller because the wet garbage is mostly organic garbage in kitchen waste, and the particle size of combustible garbage such as plastic after being broken is still larger than that of the wet garbage, so that the two are separated through a screen in the sorting equipment. The separated dry garbage enters a household garbage incineration system 6 for combustion, and the separated wet garbage is subjected to fermentation treatment. The deodorization system can collect odor in the garbage transportation process and indoor odor, and the odor is discharged into the air after purification treatment.

Garbage pretreatment system and bag breaking system

The garbage pretreatment system comprises a conveying device 5 and a rotary screen 16 fixedly arranged on the conveying device 5 and used for sorting soil and stones, the conveying device 5 is identical to the conveying device 1 in structure and comprises a bracket 101 and a conveying belt 102 rotatably arranged on the bracket 101 and used for conveying garbage, the rotary screen 16 is fixedly arranged on the conveying device 5, soil blocks or sand and stones are screened out when the garbage passes through the rotary screen 16, a bag-type dust collector 9 is fixedly arranged beside the rotary screen 16, and when the soil blocks or the sand and stones are screened out, the bag-type dust collector 9 can eliminate dust, so that the garbage sorting environment is cleaner. The pre-treated waste is re-brought to a waste storage location and transported with the conveyor belt 102 to a bag breaking system. In winter, a large amount of furnace slag exists in the rural garbage, and at the moment, a garbage pretreatment system needs to be started for sorting out soil and stones in the garbage. The bag breaking system is a bag breaking machine 2 that breaks large garbage into small pieces in preparation for sorting by a sorting machine 31.

Second, garbage sorting and processing system

The garbage sorting treatment system comprises a sorting machine 31, the garbage sorting treatment system is arranged on a conveying device 1 and is located in the follow-up process of a bag breaking machine 2 and used for sorting out dry garbage and wet garbage, the bag breaking machine 2 is used for breaking and enabling the garbage to form garbage with large particle size and garbage with small particle size, after entering the sorting machine 31, the dry garbage with large particle size and the wet garbage with small particle size are separated out through a screen in the sorting machine 31 and respectively come out from a dry garbage outlet 32 and a wet garbage outlet 33 on the sorting machine 31, and a magnetism removing all-in-one machine 34 is connected to the dry garbage outlet 32 and the wet garbage outlet 33 of the sorting machine 31 and used for separating out magnetic substances such as iron wires in the garbage. And a dry garbage outlet 32 on the separator 31 is connected with the demagnetizing all-in-one machine 34 and then is connected with the household garbage incineration system 6 through the conveying device 1, and is used for incinerating dry garbage and reducing the accumulation amount of the garbage. The wet garbage outlet 33 of the separator 31 corresponds to the conveying device 1, so that the wet garbage continuously enters the air separation process along with the conveying belt 102. The garbage fermentation system is characterized in that the conveying device 1 is provided with the winnowing machine 4, scraps of paper which can be recycled and garbage which can be fermented are separated by the winnowing machine 4, when the garbage passes through the winnowing machine 4, the scraps of paper or plastic which are lighter in weight and are not separated completely by the winnowing machine 31 are blown out by the winnowing machine 4 and are collected by the scraps collecting device, and the fermented wet garbage is conveyed to the garbage fermentation system along with the conveying device 1 to be fermented. Namely, the separator 31 separates the dry garbage from the wet garbage, the dry garbage enters the household garbage incineration system 6 for incineration, and the wet garbage finally enters the garbage fermentation system for fermentation, so that resources are recycled.

The domestic waste system of burning 6 has flue gas purification processing system through the pipe connection, domestic waste system of burning 6 is used for burning dry refuse, because produce harmful gas in the flue gas after burning and can not directly discharge in the air, consequently, need carry out purification treatment to the flue gas. The household garbage incineration system 6 changes the combustion environment by magnetization, reduces the influence of the moisture content on the combustion of the household garbage by adopting a backflow hot air technology, can stably improve the temperature of a hearth, and overcomes the defects of low and unstable furnace temperature of the household garbage incinerator in the prior art.

(1) Household garbage incineration system 6

The household garbage incineration system 6 comprises an incinerator body 601 and a secondary combustion chamber 602 arranged above the incinerator body 601, as shown in fig. 4, a magnetizing device 605 is arranged on the side wall of the incinerator body 601, and the bottom of the incinerator body is communicated with a hot air generating device 604 through a primary hot air duct 603. A feeding port, a fire observation door 608 and a slag outlet door 609 are sequentially arranged at the position of a hearth of the incinerator body 601 from top to bottom, the feeding port is communicated with a garbage feeding machine 607, and garbage can be fed into the hearth under a closed condition; the fire observation door 608 is convenient for workers to observe the incineration condition of the garbage in the hearth; the slag outlet door 609 can discharge the ash slag generated by burning the domestic garbage out of the hearth. In order to isolate the heat in the furnace as much as possible and prevent the heat from being dissipated to the outside, the casing of the incinerator body 601 in this embodiment is made of metal material, and a refractory material layer is built inside the casing.

The central position of the bottom of the hearth of the incinerator body 601 is fixedly provided with a grate 610, and the whole grate 610 is of an inverted umbrella rib type structure. The grate 610 includes a fixed frame and a plurality of support rods obliquely arranged at the top end of the fixed frame, and the plurality of support rods are radially distributed by taking the top end of the fixed frame as the center. The grate 610 is arranged to distribute the refuse entering the furnace to prevent accumulation.

The lateral wall of burning furnace body 601 is provided with at least a set of denitration liquid atomizing device 606, can spray the denitration liquid in the furnace, utilizes high temperature denitration reaction, reduces the production of dioxin when the rubbish burns. In this embodiment, burn on the lateral wall of burning furnace body 601 symmetry and be provided with two denitration liquid atomizing device 606 to guarantee that the denitration liquid that sprays can cover the domestic waste in the furnace completely.

Still be provided with the furnace temperature sensor 611 that is connected with the PLC controller electricity in burning furnace body 601's the furnace, can monitor the temperature in the furnace in real time to give the PLC controller with temperature information transfer, the PLC controller judges the back through the internal program, adjusts the hot air volume and the rubbish quantity that gets into in the furnace automatically, makes domestic waste can normally, fully burn.

Locate burning furnace body 601 top's second combustion chamber 602 for rack form heat accumulation structure, can cut apart the processing to the flue gas to save the partly heat that carries in the flue gas, reach certain temperature after, can make the flue gas that passes through in the second combustion chamber 602 independently burn, and then reduce combustible gas's in the flue gas content, reduce harmful gas's composition in the flue gas.

(2) Flue gas purification treatment system

As shown in fig. 3, the flue gas purification treatment system includes a flue gas quenching tower 7, a bag-type dust collector 9, an activated carbon adsorption tower 11, a flue gas preheater 12 and a dioxin catalytic decomposition device 13 which are connected in sequence through pipelines. Wherein, flue gas preheater 12 is located domestic waste incineration system 6's exhanst gas outlet department, makes the temperature of burning the production heat the flue gas before discharging, can avoid the waste of heat resource, can make the flue gas keep invariable temperature again, avoids producing dioxin, adopts special catalyst to carry out deep purification to burning the flue gas simultaneously, can realize domestic waste's minimizing and innoxious.

(21) Flue gas quench tower 7

As shown in fig. 5, the flue gas quenching tower 7 in the flue gas purification treatment system adopts a direct water-gas exchange mode, and rapidly cools the high-temperature flue gas to about 200 ℃ through direct heat exchange between water and the high-temperature flue gas, so that the synthesis path of dioxin-like substances in the flue gas cooling process can be effectively blocked. As shown in fig. 3, the flue gas quenching tower 7 includes a quenching tower body 7, and a water spraying device 72, a mist condensing device 73, a dewatering device 74, and a water discharging device 75 which are sequentially disposed from top to bottom inside the quenching tower body 7.

Quench tower body 7 is as the main part of device, wholly comprises the metal material, and bonds on 7 inner walls of quench tower body and has thermal-insulated anticorrosive coating, can avoid quench tower body 7 to be corroded when handling the flue gas quenching. The bottom of quench tower body 7 still sets firmly support 78, supports quench tower body 7 through support 78, when guaranteeing that quench tower body 7 is stable, still helps the inside water of quench tower body 7 to pass through drainage device 75 and discharges.

Water jet equipment 72 in flue gas quench tower 7 is the high pressure squirt gun through PLC controller control, as shown in fig. 3, and the high pressure squirt gun sets up the flue gas entrance on quench tower body 7 top, and spun high-pressure rivers can fuse with the flue gas fast, replaces the heat in the flue gas in aqueous. In quench tower body 7, flue gas entrance is provided with inlet temperature sensor 76, and exit is provided with export temperature sensor 77, and inlet temperature sensor 76 and export temperature sensor 77 are equallyd divide and are connected with the PLC controller electricity respectively. When the device is operated, the PLC controller can automatically adjust the flow speed and the water quantity of the high-pressure water jet gun according to the temperature information fed back by the inlet temperature sensor 76 and the outlet temperature sensor 77, so that the flue gas temperature is controlled in the appropriate range required by the next process node while accurate quenching is realized.

Both the mist condensing device 73 and the dewatering device 74 in the flue gas quenching tower 7 are of the existing structure, as shown in fig. 5, the mist condensing device 73 is transversely arranged above the interior of the quenching tower body 7, and a certain gap is left between the edge of the mist condensing device 73 and the inner wall of the quenching tower body 7, so that the high-temperature flue gas can be shunted while the steam can be condensed into water drops; dewatering device 74 sets up the intermediate position in quench tower body 7 inside, and dewatering device 74's edge and the inseparable laminating of quench tower body 7 inner wall, can effectively reduce the humidity of flue gas.

It should be further explained that the drainage device 75 capable of discharging water in the quench tower body 7 is disposed at the bottom of the quench tower body 7 and below the flue gas outlet, and the drainage device 75 in this embodiment is a steam-water separation type steam trap, which can drain water and effectively control overflow of flue gas.

(22) Bag-type dust collector 9 and active carbon adsorption tower 11

The bag-type dust collector 9 and the activated carbon adsorption tower 11 in the flue gas purification treatment system are both of the existing structures, wherein the bag-type dust collector 9 can filter most aerosol in flue gas, and can effectively control dust generated by garbage combustion; the activated carbon adsorption tower 11 can absorb organic matters in the flue gas, so that the deep purification effect of the flue gas is achieved.

As shown in fig. 3, the flue gas desulfurization device 8 is arranged on the connecting pipeline between the bag-type dust collector 9 and the flue gas quenching tower 7, SO that the concentration of SO2 in the flue gas can be effectively reduced. More specifically, the flue gas desulfurization device 8 comprises a desulfurizer atomization module and a flue gas dust removal module which are arranged on a communicating pipeline of the bag-type dust remover 9 and the flue gas quench tower 7. In this embodiment, the flue gas dust removal module is a small bag dust removal device, and can remove aerosol generated during flue gas desulfurization.

Still be provided with flue heat exchanger 10 between sack cleaner 9 and the active carbon adsorption tower 11 in the flue gas purification processing system, flue heat exchanger 10 in this system also is current structure, can cool down the flue gas to take off most moisture in the flue gas, so that the temperature of flue gas, humidity can reach the best adsorption conditions of active carbon adsorption tower 11.

(23) Flue gas preheater 12

The flue gas preheater 12 in the flue gas purification treatment system preheats the flue gas by using the heat of the flue in the domestic waste incineration system 6, so that the flue gas can reach the reaction temperature limited by the dioxin catalytic decomposer 13. The flue gas preheater 12 in the system is a tube type gas-gas heat exchanger and is integrally arranged at the flue position of the household garbage incineration system 6. When the device is operated, the flue gas outlet of the tube array type gas-gas heat exchanger is connected with the flue gas inlet pipeline of the dioxin catalytic decomposer 13, and the flue gas inlet of the tube array type gas-gas heat exchanger is connected with the flue gas outlet pipeline of the bag-type dust collector 9.

(24) Dioxin catalytic decomposition device 13

As shown in fig. 6, the dioxin catalytic decomposer 13 in the flue gas purification treatment system includes a decomposer case 131 and a catalytic decomposition device provided inside the decomposer case 131. The catalytic decomposition device in the system adopts at least three groups of catalytic modules 132, can carry out at least three-section deep purification on the flue gas, can reduce the emission of dioxin substances to the maximum extent, and is favorable for improving the safety of pollutant emission.

The decomposer housing 131 in the dioxin catalytic decomposer 13 is a main body of the device, and is entirely made of metal material, and a heat-insulating anticorrosive layer is fixedly arranged on the inner wall of the decomposer housing 131 to prevent flue gas from corroding the decomposer housing 131. As shown in fig. 4, the upper part of the decomposer housing 131 is provided with a flue gas inlet, the lower part is provided with a flue gas outlet, flue gas enters the device from the upper part and is discharged from the lower part, so that the flue gas can be more fully contacted with the catalytic decomposition device. The bottom of the decomposer case 131 is further provided with a case bracket 136 so as to be able to stably support the decomposer case 131.

The catalytic decomposition device can be used for catalytically decomposing the dioxin in the flue gas, so that the emission of dioxin substances can be reduced to the maximum extent. The catalytic decomposition device comprises at least three groups of catalytic modules 132 so as to perform at least three-section advanced treatment on the flue gas, and as shown in fig. 4, each group of catalytic modules 132 comprises a through hole plate 133 and a catalyst filler 134. Wherein, the through hole plate 133 is arranged inside the decomposer shell 131, and the upper surface of the through hole plate 133 is provided with a catalyst filler 134 so as to generate catalytic decomposition reaction with the catalyst filler 134 when the flue gas passes through. More specifically, the perforated plate 133 has a honeycomb structure, and is made of a high temperature resistant material as a whole, and the edge of the perforated plate 133 is closely attached to the inner wall of the resolver housing 131. In this embodiment, the through hole plate 133 is made of ceramic.

In order to facilitate the staff to inspect the internal structure of the decomposer shell 131, a plurality of filler doors 135 are provided on the decomposer shell 131, wherein the filler doors 135 are respectively provided above each group of catalytic modules 132. More specifically, three groups of catalysts are provided in the present embodiment, and three packing doors 135 are provided on the corresponding decomposer case 131. As shown in fig. 4, the interior of the resolver housing 131 is provided with, in order from bottom to top: a bottom layer through hole plate 133, a bottom layer catalyst filler 134, and a bottom layer filler door 135; a middle layer through hole plate 133, a middle layer catalyst filler 134, a middle layer filler door 135; upper layer through hole plate 133, upper layer catalyst filler 134, upper layer filler door 135.

(3) Garbage fermentation system

The garbage fermentation system comprises a first crusher 27, a first stirring tank 28, a second crusher 30, a second stirring tank 31, a sewage pump, an anaerobic fermentation tank 32, a biogas cabinet 35 for storing fermentation gas and a solid-liquid separator 33 for separating biogas residues and biogas slurry which are sequentially connected with an outlet of the air separator 4 through a conveying device 1 for discharging organic garbage, wherein the heat source of the anaerobic fermentation tank 32 is solar energy.

(31) First crusher 27

The feeder hopper of first rubbing crusher 27 passes through conveyor 1 and the exit linkage that air separator 4 was used for separating organic rubbish, the diameter of the internal (mixing) shaft of railway carriage or compartment of first rubbing crusher 27 is 150 millimeters, drives the high-speed rotation of (mixing) shaft through three-phase level four motor, is provided with rich steel sword twenty groups on the (mixing) shaft, smashes wet rubbish to about 20 millimeters, stirs in carrying first stirring pond 27 through the screen cloth of locating the bottom.

(32) First agitation tank 28

The first stirring tank 28 is V-shaped, a stainless steel water grate is arranged in the first stirring tank 28, a stirrer is arranged in the middle of the first stirring tank 28, and a water inlet pipe and a water outlet pipe are arranged at the bottom of the first stirring tank 28 and used for cleaning the first stirring tank 28 and diluting organic garbage, so that stirring is facilitated. Because some fine soil and stones can be adhered to the organic garbage and cannot be completely screened in the garbage pretreatment system, the fine soil and stones need to be separated again in the first stirring tank 28, in the process of stirring the organic garbage, small pieces of soil and stones fall into the bottom of the first stirring tank 28 through the stainless steel water grate, and large pieces of organic garbage are located above the stainless steel water grate under the buoyancy action of water. The side wall of the first stirring tank 28 is provided with two grooves, the scraper machines 29 are fixedly arranged in the two grooves, one is used for conveying organic garbage above the stainless steel water grate to the second crusher 30, the other is used for conveying earth and stones below the stainless steel water grate to the outside of the first stirring tank 28, in order to prevent the earth and stones from falling into the first stirring tank 28 again in the conveying process, the scraper machines 29 used for conveying the earth and stones and the inner wall of the first stirring tank 28 are sealed, and the earth and stones are smoothly conveyed to the outside of the first stirring tank 28.

(33) A second pulverizer 30 and a second agitation tank 31

The organic garbage in the first stirring tank 28 is conveyed out through the scraper 29, and is conveyed to the second crusher 30 through the conveying device 1, the organic garbage is crushed again to enable the particle size of the organic garbage to reach 5 mm, and then flows into the second stirring tank 31, a high-speed stirrer is arranged in the second stirring tank 31, excrement and fermentation strains are added into the organic garbage, the organic garbage and the fermentation strains are fully mixed under the condition of high-speed stirring, and a sewage pump is arranged on the side edge of the second stirring tank 31 and is used for pumping the mixed garbage in the second stirring tank 31 into the anaerobic fermentation tank 32 for fermentation.

(34) Anaerobic fermentation tank 32

The anaerobic fermentation tank 32 is connected with the solar panel 34, so that the solar panel 34 provides electric energy for the fermentation of the anaerobic fermentation tank 32, and the fermentation temperature is ensured. The anaerobic fermentation tank 32 is fixedly connected with the biogas cabinet 35 and used for storing fermentation gas, the fermented gas is used for combustion, the fermented biogas residues and biogas slurry are separated from solid biogas residues and liquid biogas slurry through the solid-liquid separator 33, the biogas residues are used as organic fertilizers and are transported away by peasant households to be used for trees and greening fertilizers, one part of the biogas slurry is used as bacterial liquid to flow back into the anaerobic fermentation tank for reuse, and the other part of the biogas slurry enters the sewage treatment station for treatment and purification and is used for water in factory workshops to irrigate flowers and trees, so that the organic garbage can be completely recycled, and no harmful substances can be generated.

The biogas cabinet 35 is sequentially connected with a desulfurizing tower 36, a three-blade roots blower 37, a biogas hot water boiler 38 and a heating system, and after biogas is recovered and post-treated, the biogas is used for heating water in the biogas hot water boiler 38 and providing circulating water for the heating system.

Third, deodorizing system

The deodorization system comprises a gas collecting device 20, a fan 21, a sealing cover 18, a suction hood 22 and a spraying device 23. The sealing cover 18 on the conveying belt 102 is semi-arc-shaped and fixed on the bracket 101 and is buckled on the conveying belt 102, so that not only can the garbage have enough space in the transportation process, but also the odor can be prevented from being emitted into the air. The drum screen 16, the bag-type dust collector 9 in the garbage pretreatment system, the bag breaking machine 2, the sorting machine 31, the integrated demagnetizing machine 34, and the sealing covers 18 on the inlet and the outlet of the winnowing machine 4 are in inverted conical shapes, the sealing covers 18 are connected with the gas collecting device 20 through the pipeline 19, the fan 21 is connected with the gas collecting device 20 to generate negative pressure in the gas collecting device 20 for absorbing the odor in the sealing covers 18 into the gas collecting device 20, and the gas collecting device 20 is connected with the photo-hydrogen ion purifier 24 and the deodorizing tower 25 for odor treatment so as to enable the odor to be directly discharged into the air. The other end of the fan 21 is connected with a plurality of air suction hoods 22 through a pipeline 19, and the air suction hoods 22 are arranged at the top of the room and used for sucking the odor of the garbage storage place in the room. The spraying device 23 is used for spraying deodorant liquid indoors and is fixedly arranged at the top of the room, the spraying device 23 is a pipeline spraying device capable of generating spraying, and air meshes 26 are arranged on a doorway of the room for preventing insects and flies from entering the room.

Fourth, the working process

The garbage that will transport is put in the position that rubbish was deposited, if the rubbish that transports is the rubbish in the rural area in winter, the inside contains a large amount of ashes and slag, then start rubbish pretreatment systems, come out great soil stone granule separation in the rubbish, then transport to the bag breaker through conveyor 1 and carry out the breakage, get into sorter 31 after the breakage, with dry rubbish and wet rubbish separation, dry rubbish finally gets into in the domestic waste system of burning 6 and burns, wet rubbish gets into the fermentation system of rubbish through air separator 4 and ferments.

The household garbage incineration system 6 incinerates the household garbage, ash generated by incineration is buried, flue gas generated by incineration enters the flue gas quench tower 7, the flue gas quench tower 7 rapidly cools high-temperature flue gas in a gas-water direct heat exchange mode, the cooled flue gas enters the bag-type dust remover 9 of the flue gas purification treatment system after being desulfurized by the flue gas desulfurization device 8, and particulate matters in the flue gas are filtered by the bag-type dust remover 9; the filtered flue gas is further cooled and dehydrated by a flue heat exchanger 10, and then enters an active carbon adsorption tower 11, and the active carbon adsorption tower 11 is used for absorbing organic matters in the gas to deeply purify the gas; preheating the flue gas after deep purification by a flue gas preheater 12, and then carrying out catalytic decomposition reaction in a dioxin catalytic decomposer 13 to remove dioxin substances in the flue gas; finally, the purified flue gas is limited in height and is discharged through the discharge cylinder 14.

The garbage fermentation system is used for fermenting organic garbage, the garbage is firstly crushed into small blocks by a first crusher 27 before fermentation, then the small blocks enter a first stirring tank 28 for stirring, soil and stones are separated out, then the small blocks enter a second crusher 30 for crushing the organic garbage into paste, water and strains are added into a second stirring tank 31 for stirring, the paste is pumped into an anaerobic fermentation tank 32 for fermentation by a sewage pump, the fermented gas is used for combustion, the water in a biogas hot water boiler 38 is heated, and the heated water is used for hot water circulation in a heating system. The fermented fixed body biogas residues and the liquid biogas slurry are separated by a solid-liquid separator 33, the biogas residues are used as field fertilizers, and the biogas slurry is used for irrigating flowers and the like after being treated.

Claims

1. The utility model provides a mix domestic waste letter sorting innocent treatment system which characterized in that: the garbage bag breaking and sorting device comprises a garbage pretreatment system, a bag breaking system, a garbage sorting system and a deodorization system which are sequentially connected through a conveying device and are arranged indoors;

2. The mixed household garbage sorting harmless treatment system according to claim 1, characterized in that: and a bag-type dust remover for removing dust is fixedly arranged on the conveying device of the garbage pretreatment system.

3. The mixed household garbage sorting harmless treatment system according to claim 2, characterized in that: and a dry garbage outlet and a wet garbage outlet of the separator are both connected with a demagnetization all-in-one machine.

4. The mixed domestic waste sorting harmless treatment system according to any one of claims 1 to 3, wherein: the household garbage incineration system comprises an incinerator body and a second combustion chamber which is arranged above the incinerator body and is in a net rack shape and used for storing heat; the lateral wall of the incinerator body is fixedly provided with a magnetizing device, and the bottom of the incinerator body is communicated with a hot air generating device through a primary hot air channel; at least one group of denitration liquid atomization devices are symmetrically arranged on the side wall of the incinerator body.

5. The mixed household garbage sorting harmless treatment system according to claim 4, characterized in that: the flue gas quenching tower comprises a quenching tower body, and a water spraying device, a mist condensing device, a dewatering device and a drainage device which are arranged in the quenching tower body; the water spraying device is arranged at a flue gas inlet at the top end of the quenching tower body; the mist condensing device is arranged at the upper position inside the quenching tower body and is positioned below the water spraying device; the dehydration device is arranged in the middle of the interior of the quench tower body and is positioned above the flue gas outlet; the drainage device is arranged at the bottom end of the quench tower body and is positioned below the flue gas outlet; be provided with import temperature sensor and export temperature sensor in the quench tower body, and import temperature sensor and export temperature sensor equally divide and do not be connected with the PLC controller electricity.

6. The mixed household garbage sorting harmless treatment system according to claim 5, characterized in that: dioxin catalysis decomposes ware including dividing a ware casing and catalytic decomposition device, catalytic decomposition device locates inside dividing a ware casing, including three at least group catalytic module, every group catalytic module all includes through-hole board and catalyst filler, and every group catalytic module's top all is equipped with a filler door, the filler door is opened and is located on dividing a ware casing.

7. The mixed domestic waste sorting harmless treatment system according to any one of claims 1-3, 5, 6, characterized in that: a flue gas desulfurization device is also arranged between the flue gas quenching tower and a bag-type dust collector in the flue gas purification treatment system; the flue gas desulfurization device comprises a desulfurizer atomization module and a flue gas dust removal module which are arranged on a communicating pipeline of the flue gas quench tower and the bag-type dust remover.

8. The mixed domestic waste sorting innocent treatment system of claim 7, wherein: and a flue heat exchanger is also arranged between the bag-type dust collector and the active carbon adsorption tower in the flue gas purification treatment system.

9. The mixed domestic waste sorting innocent treatment system of claim 8, wherein: the spraying device is fixedly arranged at the top of the room and is a pipeline spraying device capable of generating spraying; the entrance of the entrance is provided with a wind mesh for preventing insects and flies from entering.

10. The mixed domestic waste sorting harmless treatment system according to any one of claims 1-3, 5, 6, 8, 9, characterized in that: the methane cabinet is sequentially connected with a desulfurizing tower, a three-blade Roots blower, a methane hot water boiler and a heating system.