CN111662139A

CN111662139A - Method for environment-friendly treatment of domestic sludge by using garden waste

Info

Publication number: CN111662139A
Application number: CN202010597497.5A
Authority: CN
Inventors: 秦国梁; 陈超
Original assignee: Jiangsu Kaijin Ecological Environment Co ltd; Nanjing Gianda Road & Bridge Construction Co ltd; Jiangsu Jiuzhi Environmental Technology Service Co ltd
Current assignee: Jiangsu Kaijin Ecological Environment Co ltd; Nanjing Gianda Road & Bridge Construction Co ltd; Jiangsu Jiuzhi Environmental Technology Service Co ltd
Priority date: 2020-06-28
Filing date: 2020-06-28
Publication date: 2020-09-15

Abstract

The invention discloses a method for environment-friendly treatment of domestic sludge by using garden waste, which comprises the following steps: s1, removing stones, plastic pieces and other impurities in the garden waste and the urban domestic sludge, and then mixing the garden waste and the urban domestic sludge; s4, crushing the mixture; s5, crushing the mixture, and then performing ball milling and crushing; s6, pouring the mixture of the crushed garden waste and the urban domestic sludge into a composting device, continuously introducing humidified air into the composting device to ensure that the whole composting period reaches 45-60 days, and continuously stirring the mixture in the composting process; and S8, after the composting period expires, pouring the mixture out of the composting device to obtain the improved soil. The invention has the technical effects that: the method utilizes the microbial decomposition mode of composting treatment to effectively apply garden waste to the treatment of urban domestic sludge, and has great promotion effect on the improvement of urban soil.

Description

Method for environment-friendly treatment of domestic sludge by using garden waste

Technical Field

The invention relates to the technical field of municipal domestic sludge treatment, in particular to a method for environment-friendly treatment of domestic sludge by using garden waste.

Background

Garden waste, also called garden waste or green waste, mainly refers to plant residues produced by natural withering or artificial trimming of garden plants, mainly including leaves, grass clippings, trees, shrub pruning and the like, and the main component of the plant residues is wood fiber. With the increasing of urban greening coverage rate, the quantity of garden plant wastes is increasing day by day, and the garden plant wastes are different from daily life, medical use, industrial production and other wastes due to the fact that the garden plant wastes contain rich organic substances and nutrient substances, so that the garden waste has a good resource utilization value.

At present, the common treatment mode of the garden wastes is landfill or incineration, the landfill mode occupies a large amount of land, the transportation cost is high, and the landfill site needs to be subjected to anti-seepage treatment to prevent the potential pollution of the surrounding environment caused by soil, water and atmosphere; the burning mode can seriously pollute the air, and a large amount of harmful gases such as ammonia, sulfide, dioxin and the like generated by burning can also seriously affect the physical health of people.

With the continuous promotion of the urbanization process of China, the yield of the municipal domestic sludge is also increased sharply. The municipal domestic sludge mainly comprises domestic sewage sludge, industrial sewage sludge, water supply sludge, river dredging sludge, water supply and drainage pipe network sludge and the like, wherein the domestic and industrial sewage sludge belongs to the country with the largest yield, the highest pollution degree, the largest harm and the most difficult treatment. If the urban domestic sludge can be effectively applied to the treatment of the urban domestic sludge, and the urban domestic sludge is improved by taking the garden waste as a main composting raw material, the urban domestic sludge has profound significance for improving the urban soil.

Therefore, the garden waste and the municipal domestic sludge need to be combined at present, and the design of a method for treating the domestic sludge by utilizing the garden waste in an environment-friendly manner is particularly important.

Disclosure of Invention

The invention aims to provide a method for treating domestic sludge by using garden waste in an environment-friendly way, which has the advantages that: the method utilizes the microbial decomposition mode of composting treatment to effectively apply garden waste to the treatment of urban domestic sludge, and has great promotion effect on the improvement of urban soil.

The technical purpose of the invention is realized by the following technical scheme: a method for environment-friendly treatment of domestic sludge by using garden waste comprises the following steps: s1, removing stones, plastic pieces and other impurities in the garden waste and the urban domestic sludge, and then mixing the garden waste and the urban domestic sludge; s4, crushing the mixture of garden waste and urban domestic sludge; s5, crushing the mixture of garden waste and urban domestic sludge, and then carrying out ball milling and crushing; s6, pouring the mixture of the crushed garden waste and the urban domestic sludge into a composting device, continuously introducing humidified air into the composting device to ensure that the whole composting period reaches 45-60 days, and continuously stirring the mixture in the composting process; and S8, after the composting period expires, pouring the mixture out of the composting device to obtain the improved soil.

Through the technical scheme, before mixing garden waste and urban domestic sludge, stones, plastic parts and other impurities mixed in the garden waste are removed, so that the quality and purity of the final mixture can be effectively ensured, and the situation that the stone is thrown into a crusher and a ball mill to cause unsmooth operation of the crusher and the ball mill and damage is avoided; after the mixture is crushed by a crusher, the mixture is further ball-milled and crushed by a ball mill, so that the mixing effect of garden waste and urban domestic sludge can be effectively improved, the garden waste is fully fused into the urban domestic sludge, and the later composting treatment is more complete; the crushed mixture is poured into a composting device, humidified air is continuously introduced into the composting device, and urban domestic sludge and garden waste are decomposed into nutrient substances which are easily absorbed and utilized by plants and generate stable humus by microorganisms in a microorganism decomposition mode, namely microorganisms such as bacteria, actinomycetes and fungi widely existing in the nature are utilized, so that the whole composting process is completed, the whole composting period is as long as 45-60 days, and the mixture after composting has a great promotion effect on improvement of urban soil.

The invention is further configured to: further comprising the steps of: s2, placing and draining the mixed garden waste and urban domestic sludge; and S3, draining the mixture, and then drying and dehydrating the mixture by using a drying device to reduce the water content of the mixture to below 10%.

According to the technical scheme, before the mixture of garden waste and urban domestic sludge is crushed, the mixture is dried by the drying device, so that the water content of the mixture is reduced to below 10%, and the dehydration process of the mixture is completed, sewage in the mixture is discharged to the greatest extent, the pollutants in the sewage are reduced to exist in the mixture, and the pollutants are transferred to other environments used by the mixture along with the mixture, so that the secondary pollution is caused; in addition, before the mixture is sent into the drying device for drying, the mixture is placed and drained firstly, so that excessive sewage carried by the mixture is prevented, and the sewage flows in the drying device and is inconvenient to clean.

The invention is further configured to: further comprising the steps of: and S7, performing high-temperature sterilization treatment on the compost-treated mixture by using a heating device, and continuously stirring the mixture in the high-temperature sterilization process.

Through the technical scheme, after the mixture is composted, the mixture is heated at a high temperature for a period of time by using the heating device so as to kill germs, worm eggs and weed seeds in the mixture, and the mixture is continuously stirred in the process so as to be completely sterilized, so that the quality of the final mixture can be improved.

The invention is further configured to: drying device is including the stoving box, be provided with the workstation that is used for stacking the mixture in the stoving box, the workstation slides along the length direction of stoving box and sets up, the hot-blast mouthful that link up is seted up along one side of width direction to the stoving box, the hot-blast mouthful is located the workstation top, install a plurality of heating pipes in the hot-blast mouthful, one side that the stoving box is located the hot-blast mouthful is provided with the forced draught blower, be connected with the fan housing between the air outlet of forced draught blower and the hot-blast mouthful, set up a plurality of exhaust holes that link up on the roof of stoving box.

Through above-mentioned technical scheme, stack the mixture on the workstation, in propelling the stoving box along with the workstation together, then with forced draught blower and heating pipe circular telegram, heating pipe circular telegram back generates heat, in the forced draught blower sent outside air into the fan housing, wind is at the in-process through the heating pipe, and the contact intensification of heating pipe forms hot-blastly, blows to in the stoving box to can dry the mixture of stacking on the workstation, with the quick dehydration of mixture.

The invention is further configured to: the heating pipe is wound with fins, and a plurality of air guide plates which are inclined downwards are arranged at intervals along the horizontal direction at one side of the hot air port, which is away from the fan cover, of the heating pipe.

By the technical scheme, the contact area between the air and the heating pipe is enlarged by the arranged fins, so that the heating effect on the air is improved, and the drying effect on the mixture is further improved; the air guide plate is used for guiding hot air blown into the drying box body to the mixture and directly blowing the hot air to the mixture so as to improve the drying efficiency of the mixture.

The invention is further configured to: the drying box is characterized in that a sewage groove is formed in one side, away from the hot air port, of the workbench in the drying box body, a sewage outlet penetrating through the side wall of the drying box body is communicated with the sewage groove, and the top wall of the drying box body is downwards arranged from one side of the hot air port to one side of the sewage groove in an inclined mode.

Through above-mentioned technical scheme, the mixture stoving in-process, the steam that the evaporation produced condenses on the roof of stoving box, then trickles downwards along the incline direction of stoving box roof, finally drips in the bilge pit, collects to reduce steam and fall back again on the mixture, cause the poor condition of mixture dehydration effect, and reduce steam and drip other places in the stoving box, cause the possibility of clearance difficulty.

The invention is further configured to: the composting device comprises a composting box body, the top opening of the composting box body is hermetically connected with a box cover, an exhaust pipe is arranged on the box cover, a partition plate is arranged inside the composting box body, a plurality of through air holes are formed in the partition plate, an inner cavity of the composting box body is divided into an upper cavity and a lower cavity by the partition plate, a standing box body used for storing a mixture is arranged in the upper cavity, the standing box body is arranged on the partition plate, a plurality of through holes are formed in the outer wall of the standing box body, an air pump is arranged on one side of the composting box body, a water storage tank is arranged between the air pump and the composting box body, an air supply pipe communicated between the air outlet of the air pump and the inside of the water storage tank.

Through the technical scheme, the crushed mixture is poured into the standing box, then the air pump is started, the air pump sends external air into the water storage box through the air supply pipe, the external air is blown out of the water surface in a bubble mode after being contacted with water in the water storage box, so that the air can be humidified, the humidified air enters the air outlet pipe and finally enters the lower cavity of the lower part of the compost box body, then the humidified air rises in the compost box body and is contacted with the mixture stored in the standing box body, so that the compost treatment process is realized, the whole compost period needs 45-60 days, and the whole compost treatment process depends on the self life activity of microorganisms to mineralize, humate and innoxiously change the mixture into rotten fertilizer.

The invention is further configured to: the inner wall of the compost box body is provided with vent grooves communicated with the upper cavity and the lower cavity along the periphery, and a plurality of struts used for supporting and fixing the partition plates are arranged between the partition plates and the bottoms of the vent grooves along the periphery.

Through the technical scheme, the wet air sent into the lower cavity through the air outlet pipe partially enters the air channel formed by the inner wall of the compost box body in the process of rising upwards, so that the wet air continuously rises upwards along the air channel and can be fully contacted with the mixture, and the composting effect on the mixture is improved.

The invention is further configured to: the box that stews is provided with agitating unit in, agitating unit includes agitator motor, (mixing) shaft and stirring vane, agitator motor installation is fixed on the case lid, the (mixing) shaft is connected with agitator motor's output shaft, the (mixing) shaft runs through the case lid and extends to the box that stews inside, stirring vane installation is fixed on the part that the (mixing) shaft is located the box that stews.

Through the technical scheme, the mixture needs to be stirred once every 3 days within 45-60 days of the whole composting period, the stirring motor is turned on during stirring, the stirring shaft and the stirring blades are driven by the output shaft of the stirring motor to rotate, the mixture is stirred in the rotating process of the stirring blades so as to be continuously stirred, more parts of the mixture are in contact with wet air, and the composting effect on the mixture is further improved; and in the process of sterilizing the mixture at high temperature, the mixture is also stirred by the stirring device, so that the mixture is fully heated, and the sterilizing effect is improved.

The invention is further configured to: the heating device comprises heating plates paved on the lower surface of the box cover, the inner side wall of the compost box body and the inner bottom wall of the compost box body.

Through above-mentioned technical scheme, during pasteurization, with the hot plate circular telegram, generate heat through the hot plate and make the inside intensification of compost box to carry out high temperature heating to the mixture, in order to kill germ, worm's ovum and weed seed in the mixture, improve the quality of final mixture.

In conclusion, the invention has the following beneficial effects:

1. the garden waste is effectively applied to the treatment of urban domestic sludge by utilizing a microbial decomposition mode of composting treatment, and the method has a great promotion effect on the improvement of urban soil;

2. before the mixture is crushed, drying the mixture to reduce the water content of the mixture to below 10 percent so as to discharge the sewage in the mixture as far as possible, reduce the pollutants in the sewage existing in the mixture and transfer the sewage to other environments where the sewage is used along with the mixture to cause secondary pollution;

3. after the mixture is composted, high-temperature sterilization treatment is carried out to kill germs, worm eggs and weed seeds in the mixture, and the mixture is continuously stirred in the process to ensure complete sterilization, thereby improving the quality of the final mixture.

Drawings

Fig. 1 is a schematic structural diagram of a drying apparatus according to the present embodiment.

Fig. 2 is a sectional view of the present embodiment for showing the interior of the drying cabinet.

FIG. 3 is a schematic structural diagram of the composting apparatus of the present embodiment.

FIG. 4 is a structural sectional view of the present embodiment for embodying the inside of the compost bin body.

Reference numerals: 1. a drying device; 11. drying the box body; 12. a work table; 13. a hot air port; 14. heating a tube; 141. a fin; 15. a blower; 16. a fan housing; 17. an air exhaust hole; 18. an air induction plate; 19. a sewage tank; 191. a sewage draining outlet; 2. a composting apparatus; 21. a compost bin body; 211. an upper chamber; 222. a lower cavity; 22. a box cover; 221. an exhaust pipe; 23. a partition plate; 231. a vent hole; 24. standing the box body; 241. a through hole; 25. an air pump; 26. a water storage tank; 27. an air supply pipe; 28. an air outlet pipe; 29. a vent channel; 291. a pillar; 3. a stirring device; 31. a stirring motor; 32. a stirring shaft; 33. a stirring blade; 4. a heating device; 41. heating the plate.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

Example (b): the utility model provides a method for utilize gardens discarded object environmental protection to handle domestic sludge, refer to fig. 1 and fig. 2, including drying device 1, drying device 1 includes stoving box 11 and sets up workstation 12 that is used for stacking the mixture in stoving box 11, stoving box 11 is rectangle and inside hollow box, workstation 12 extends along the length direction of stoving box 11, and workstation 12 slides along the length direction of stoving box 11 and sets up, the operator can pull out workstation 12 from stoving box 11, also can push into stoving box 11 with workstation 12 in, in order to conveniently stack the mixture. One side of the drying box body 11 along the width direction is provided with a through hot air port 13, the hot air port 13 extends along the length direction of the drying box body 11, the hot air port 13 is positioned above the workbench 12, and meanwhile, the top wall of the drying box body 11 is provided with a plurality of through air exhaust holes 17.

Referring to fig. 2, a plurality of heating pipes 14 are arranged in the hot air port 13 at intervals along the length direction of the hot air port, the plurality of heating pipes 14 are all arranged along the vertical direction, two ends of each heating pipe 14 are respectively fixedly installed in the upper side wall and the lower side wall of the hot air port 13 of the drying box body 11, a blower 15 is arranged on one side of the hot air port 13 of the drying box body 11, and a fan cover 16 is fixedly connected between the air outlet of the blower 15 and the hot air port 13 so as to cover the hot air port 13 and ensure ventilation and sealing.

Referring to fig. 1 and 2, an operator firstly removes stones, plastic parts and other impurities from garden waste and municipal sludge, and then the garden waste and the municipal sludge are treated according to the volume of 2: 3 to form a mixture of garden waste and municipal sludge, then placing the mixture for a period of time to drain, ensuring that no water drips when standing, then stacking the mixture on a workbench 12, pushing the mixture into a drying box body 11 along with the workbench 12, powering a blower 15 and a heating pipe 14 by an operator, heating the heating pipe 14 after powering on, feeding outside air into a fan cover 16 by the blower 15, heating the air to form hot air by contacting with the heating pipe 14 in the process of passing through the heating pipe 14, blowing the hot air into the drying box body 11, drying the mixture stacked on the workbench 12 to reduce the water content of the mixture to below 10 percent, thereby completing the dehydration process of the mixture, exhausting the sewage in the mixture as much as possible, reducing the pollutants in the sewage to exist in the mixture, transferring the mixture to other environments for use along with the mixture, causing secondary pollution.

Referring to fig. 2, the heating pipe 14 is wound with the fins 141, and the fins 141 increase the heat dissipation area of the heating pipe 14, and increase the temperature rise effect of the wind when the area of the wind contacting the heat source increases, thereby increasing the drying effect of the mixture. Meanwhile, a plurality of air guide plates 18 are arranged on one side, away from the fan cover 16, of the heating pipe 14 at the hot air port 13 at intervals in the horizontal direction, the air guide plates 18 are arranged downwards in an inclined mode towards one side of the workbench 12, the air guide plates 18 are fixed on the inner wall of the drying box body 11, when hot air passes through the heating pipe 14 and enters the drying box body 11, the hot air is guided by the air guide plates 18, the hot air is downwards inclined downwards and is blown to a mixture towards the workbench 12, the drying efficiency of the mixture can be improved, and the mixture is quickly dehydrated.

Referring to fig. 2, a sewage groove 19 is formed in one side of the inner bottom wall of the drying box body 11, which is located on the side of the workbench 12 away from the hot air port 13, the sewage groove 19 extends along the length direction of the drying box body 11, and one side of the sewage groove 19 away from the workbench 12 is fixedly communicated with a sewage discharge port 191 which penetrates through the outer side wall of the drying box body 11, so as to realize the discharge of sewage in the sewage groove 19, the top wall of the drying box body 11 is arranged to incline downwards from one side of the hot air port 13 to one side of the sewage groove 19, so that water vapor generated in the mixture drying process is condensed on the top wall of the drying box body 11, can flow downwards along the inclined direction of the top wall of the drying box body 11, finally drops into the sewage groove 19 for collection, and can reduce the water vapor from falling back onto the mixture again, which causes poor dehydration effect of the mixture, and reduce the, making cleaning difficult.

Referring to fig. 3, the mixture is through mixing and dehydration after, uses the breaker to carry out preliminary breakage, and the ball mill that reuses carries out degree of depth and smashes the grinding, can effectively improve the mixed effect of gardens discarded object and city domestic sludge for the gardens discarded object fully fuses in the city domestic sludge. In the embodiment, the composting device 2 is further included, the composting device 2 includes a composting box body 21 and a box cover 22 arranged at the top opening of the composting box body 21, the composting box body 21 is a cylindrical box body with an inner cavity, and the box cover 22 is arranged in a manner of matching with the composting box body 21 and covers the composting box body 21 and is used for closing the top opening of the composting box body 21; an annular groove is formed in the end wall of the opening of the compost box body 21 along the periphery, the box cover 22 is arranged in the annular groove, and a layer of sealing gasket is arranged on the groove wall and the groove bottom of the annular groove along the periphery, so that the box cover 22 can be connected with the compost box body 21 in a sealing mode.

Referring to fig. 4, a partition 23 is horizontally disposed in the compost bin body 21, a plurality of through vent holes 231 are densely distributed on the partition 23, the partition 23 is located at the lower portion of the compost bin body 21, the partition 23 divides the inner cavity of the compost bin body 21 into an upper cavity 211 and a lower cavity 222, a circle of vent grooves 29 are formed in the inner wall of the compost bin body 21 along the periphery, the vent grooves 29 are communicated with the upper cavity 211 and the lower cavity 222, so that the vent grooves 29 penetrate through the partition 23, a plurality of support columns 291 are fixedly arranged between the bottom of the vent grooves 29 and the edge of the partition 23 along the periphery to support and fix the partition 23, and a certain distance is formed between the outer edge of the partition 23 and the wall of the vent grooves 29, so that the lower cavity 222. The upper cavity 211 is internally provided with a standing box body 24 for storing the mixture, the standing box body 24 is cylindrical, the interior of the standing box body is provided with a cavity and an opening at the top, and the peripheral wall and the bottom wall of the standing box body 24 are provided with a plurality of through holes 241, so that the inner cavity of the standing box body 24 can be communicated with the inner cavity of the compost box body 21, and the standing box body 24 is directly lapped on the partition plate 23.

Referring to fig. 3 and 4, an exhaust pipe 221 for communicating the inner cavity of the composting box 21 with the outside is fixedly arranged on the box cover 22, an air pump 25 is arranged on one side of the composting box 21, a water storage tank 26 is arranged between the air pump 25 and the composting box 21, the water storage tank 26 is of a cylindrical structure with an internal cavity, the inner cavity of the water storage tank 26 is closed, a water injection pipe is fixedly communicated with the top wall of the water storage tank 26 to facilitate water addition into the water storage tank 26, an air supply pipe 27 is connected to the air outlet of the air pump 25, one end of the air supply pipe 27, which is far away from the air pump 25, extends into the water storage tank 26 from the top wall of the water storage tank 26 until being close to the bottom wall of the water storage tank 26, an air outlet pipe 28 is fixedly communicated with.

Referring to fig. 3 and 4, the mixture after being crushed and ground is put into a standing box 24, then an air pump 25 is turned on, the air pump 25 feeds outside air into a water storage tank 26 through an air feed pipe 27, the air is blown out of the water surface in the form of bubbles after contacting with water in the water storage tank 26, so that the air can be humidified, the humidified air enters an air outlet pipe 28 and finally enters a lower cavity 222 at the lower part of a compost box 21, the humidified air rises in the compost box 21, and part of the humidified air enters an air channel 29 formed on the inner wall of the compost box 21, so that the humidified air continues to rise upwards along the air channel 29 and can be fully contacted with the mixture stored in the standing box 24, and the urban domestic sludge and garden waste are decomposed into nutrient substances which can be easily absorbed and utilized by plants and generate stable humus by the microorganism decomposition mode, namely, microorganisms such as bacteria, actinomycetes, fungi and the like widely existing in the nature are utilized, therefore, the whole composting process is completed, the whole composting period needs 45-60 days, and the mixture after composting has great promotion effect on the improvement of urban soil.

Referring to fig. 4, a stirring device 3 is arranged in the standing box 24, the stirring device 3 includes a stirring motor 31, a stirring shaft 32 and a stirring blade 33, the stirring motor 31 is fixedly installed in the middle of the top wall of the box cover 22, the stirring shaft 32 is connected with an output shaft of the stirring motor 31, the stirring shaft 32 vertically penetrates through the box cover 22 downwards and extends to the bottom wall of the standing box 24 close to the standing box 24, the stirring blade 33 is fixedly installed on the portion, located in the standing box 24, of the stirring shaft 32, the stirring blade 33 adopts a ribbon type stirring blade, the mixture can be turned over in a large area, the stirring effect is improved, and the stirring device 3 can be fixedly installed and can be taken along with the box cover 22. When the mixture is stirred once every 3 days within 45-60 days of the whole composting period, an operator turns on the stirring motor 31, the output shaft of the stirring motor 31 drives the stirring shaft 32 and the stirring blade 33 to rotate, and the mixture is stirred during the rotation of the stirring blade 33 so as to continuously turn over the mixture, so that more parts of the mixture are in contact with wet air, and the composting effect on the mixture is improved.

Referring to fig. 4, a heating device 4 is provided in the compost box 21, the heating device 4 includes a plurality of heating plates 41, the plurality of heating plates 41 are respectively laid on the lower surface of the box cover 22, the inner side wall of the compost box 21 and the inner bottom wall of the compost box 21, after the heating plates 41 are electrified, the heating plates 41 can generate heat to generate high temperature, so that after the mixture is composted, an operator energizes the heating plates 41 for a period of time, the heat is generated through the heating plates 41 to heat the inside of the compost box 21, so that the mixture is heated at high temperature, so as to kill germs, eggs and weed seeds in the mixture, and in the process, the mixture is continuously stirred by using the stirring device 3, so that the sterilization is complete, and the quality of.

The treatment method comprises the following steps:

s1, an operator firstly removes stones, plastic pieces and other impurities in the garden waste and the urban domestic sludge, and then the garden waste and the urban domestic sludge are treated according to the volume of 2: 3, mixing;

s2, placing and draining the mixed garden waste and urban domestic sludge;

s3, draining the mixture, and then drying and dehydrating the mixture by using the drying device 1 to reduce the water content of the mixture to below 10%;

s4, crushing the mixture of garden waste and urban domestic sludge by using a crusher;

s5, crushing, and then performing ball milling and crushing by using a ball mill;

s6, pouring the mixture of the crushed garden waste and the urban domestic sludge into the composting device 2, continuously introducing the humidified air into the composting device 2 to ensure that the whole composting period reaches 45-60 days, and then stirring the mixture once every 3 days in the composting process;

s7, performing high-temperature sterilization treatment by using the heating device 4 after composting the mixture, and continuously stirring the mixture in the high-temperature sterilization process;

s8, finally pouring the mixture out of the composting device 2 to obtain the improved soil.

The embodiments of the present invention are preferred embodiments of the present invention, and the scope of the present invention is not limited by these embodiments, so: all equivalent changes made according to the structure, shape and principle of the invention are covered by the protection scope of the invention.

Claims

1. A method for environment-friendly treatment of domestic sludge by using garden waste is characterized by comprising the following steps: the method comprises the following steps:

s1, removing stones, plastic pieces and other impurities in the garden waste and the urban domestic sludge, and then mixing the garden waste and the urban domestic sludge;

s4, crushing the mixture of garden waste and urban domestic sludge;

s5, crushing the mixture of garden waste and urban domestic sludge, and then carrying out ball milling and crushing;

s6, pouring the mixture of the crushed garden waste and the urban domestic sludge into a composting device (2), continuously introducing humidified air into the composting device (2) to ensure that the whole composting period reaches 45-60 days, and continuously stirring the mixture in the composting process;

and S8, pouring the mixture out of the composting device (2) after the composting period expires, and obtaining the improved soil.

2. The method for environmentally treating domestic sludge by using garden waste according to claim 1, wherein the method comprises the following steps: the method comprises the following steps:

s2, placing and draining the mixed garden waste and urban domestic sludge;

and S3, draining the mixture, and then drying and dehydrating the mixture by using a drying device (1) to reduce the water content of the mixture to below 10%.

3. The method for environmentally treating domestic sludge by using garden waste according to claim 1, wherein the method comprises the following steps: the method comprises the following steps:

and S7, performing high-temperature sterilization treatment by using a heating device (4) after composting treatment of the mixture, and continuously stirring the mixture in the high-temperature sterilization process.

4. The method for environmentally treating domestic sludge by using garden waste according to claim 2, wherein the method comprises the following steps: drying device (1) is including drying box (11), be provided with workstation (12) that are used for stacking the mixture in drying box (11), workstation (12) slide along the length direction of drying box (11) and set up, hot-blast mouthful (13) that link up are seted up along one side of width direction in drying box (11), hot-blast mouthful (13) are located workstation (12) top, install a plurality of heating pipes (14) in hot-blast mouthful (13), one side that drying box (11) are located hot-blast mouthful (13) is provided with forced draught blower (15), be connected with fan housing (16) between the air outlet of forced draught blower (15) and hot-blast mouthful (13), set up a plurality of exhaust hole (17) that link up on the roof of drying box (11).

5. The method for environmentally treating domestic sludge by using garden waste according to claim 4, wherein the method comprises the following steps: fins (141) are wound on the heating pipe (14), and a plurality of air guide plates (18) which are inclined downwards are arranged at intervals along the horizontal direction at one side of the heating pipe (14) which is far away from the fan cover (16) of the hot air port (13).

6. The method for environmentally treating domestic sludge by using garden waste according to claim 4, wherein the method comprises the following steps: one side that lies in workstation (12) and deviates from hot-blast mouthful (13) in stoving box (11) is provided with sewage groove (19), the intercommunication has drain (191) that run through stoving box (11) lateral wall on sewage groove (19), the roof of stoving box (11) is by one side slope downward setting of hot-blast mouthful (13) to sewage groove (19).

7. The method for environmentally treating domestic sludge by using garden waste according to claim 1, wherein the method comprises the following steps: the composting device (2) comprises a composting box body (21), a box cover (22) is connected to the opening at the top of the composting box body (21) in a sealing mode, an exhaust pipe (221) is arranged on the box cover (22), a partition plate (23) is arranged inside the composting box body (21), a plurality of through air holes (231) are formed in the partition plate (23), the partition plate (23) divides the inner cavity of the composting box body (21) into an upper cavity (211) and a lower cavity (222), a standing box body (24) used for storing a mixture is arranged in the upper cavity (211), the standing box body (24) is arranged on the partition plate (23), a plurality of through holes (241) are formed in the outer wall of the standing box body (24), an air pump (25) is arranged on one side of the composting box body (21), and a water storage tank (26) is arranged between the air pump (, an air supply pipe (27) is communicated between the air outlet of the air pump (25) and the inside of the water storage tank (26), and an air outlet pipe (28) is communicated between the top wall of the water storage tank (26) and the lower cavity (222) of the composting tank body (21).

8. The method for environmentally treating domestic sludge by using garden waste according to claim 7, wherein the method comprises the following steps: the inner wall of the composting box body (21) is provided with vent grooves (29) which are communicated with the upper cavity (211) and the lower cavity (222) along the periphery, and a plurality of struts (291) used for supporting and fixing the partition plate (23) are arranged between the partition plate (23) and the bottom of the vent groove (29) along the periphery.

9. The method for environmentally treating domestic sludge by using garden waste according to claim 7, wherein the method comprises the following steps: the static box is characterized in that a stirring device (3) is arranged in the static box body (24), the stirring device (3) comprises a stirring motor (31), a stirring shaft (32) and stirring blades (33), the stirring motor (31) is fixedly installed on the box cover (22), the stirring shaft (32) is connected with an output shaft of the stirring motor (31), the stirring shaft (32) penetrates through the box cover (22) and extends to the inside of the static box body (24), and the stirring blades (33) are fixedly installed on the part, located in the static box body (24), of the stirring shaft (32).

10. The method for environmentally treating domestic sludge by using garden waste according to claim 1, wherein the method comprises the following steps: the heating device (4) comprises heating plates (41) which are paved on the lower surface of the box cover (22), the inner side wall of the composting box body (21) and the inner bottom wall of the composting box body (21).