CN215403931U

CN215403931U - Regional organic waste coprocessing system

Info

Publication number: CN215403931U
Application number: CN202121929816.4U
Authority: CN
Inventors: 赵春波; 张梦竹; 李元志; 何婷; 李宝生; 赵娜
Original assignee: Beijing Mbt Environmental Protection Technology Co ltd
Current assignee: Beijing Mbt Environmental Protection Technology Co ltd
Priority date: 2021-08-17
Filing date: 2021-08-17
Publication date: 2022-01-04
Anticipated expiration: 2031-08-17

Abstract

The utility model discloses a regional organic waste cooperative treatment system which comprises a kitchen waste bin, a lifting screw machine, a crushing and sorting pulping machine, a slurry dehydrator, a solid-phase conveyor, a waste liquid collecting tank, a sludge bin, an auxiliary material bin, a feeding conveyor, a mixer, a feeder, a pushing conveyor, an aerobic fermentation device, a discharging conveyor, a fan, a temporary storage tank, a material lifting machine, a screening machine, an impurity conveyor, a product conveyor and a deodorization device. The regional organic waste cooperative treatment system has the advantages of good treatment effect and short treatment period, the fermentation period is shortened to 5-7 days from more than 20 days in the prior art, the garbage recycling turnover rate is up to more than 99%, and the regional organic waste cooperative treatment system also has the advantages of high automation degree, safe process, no secondary pollution to the environment and the like.

Description

Regional organic waste coprocessing system

Technical Field

The utility model belongs to the technical field of environmental protection, relates to the solid waste treatment industry, and particularly relates to a regional organic waste cooperative treatment system.

Background

With the rapid development of economy and the great improvement of the material consumption level, the production amount of kitchen waste in villages and small towns in China is rapidly increased. Meanwhile, with the acceleration of the urbanization process, the sewage discharge amount is increased day by day, and the sludge yield is also increased continuously.

Along with the increasingly accelerated urban and rural environmental sanitation integrated process, the urban garbage disposal plant has increasingly heavy burden and is difficult to bear a large amount of rural garbage; in addition, the transportation distance is too long, the economic benefit is not obvious, and the transportation of the garbage to the urban garbage disposal plant is difficult to maintain. The small-scale regional waste incineration equipment and technology of villages and towns are extremely incomplete, so that the environmental hidden danger of the villages and the towns is increasingly prominent, and the equipment and the technology become a restriction factor for the development of novel urbanization.

The kitchen waste and the municipal sludge are properly treated according to the principles of reduction, recycling and harmlessness, so that the urban and rural environment can be effectively improved, the resource recycling is promoted, and the novel urbanization quality and the ecological civilization construction level are improved.

At present, the treatment of the kitchen waste is mainly anaerobic fermentation, but an anaerobic treatment system is huge, the investment is high, the retention time is long, and the generated biogas residue liquid needs secondary treatment; the technology and debugging requirements are high, the resource conversion rate is low (the analysis and the method comparison of the kitchen waste treatment in China published in 2020 by Polaris environment-friendly network), and the burden of the kitchen waste treatment in village and town areas cannot be really solved; the sludge treatment technology mainly comprises dehydration landfill, drying incineration, aerobic fermentation and anaerobic digestion. The landfill treatment is carried out, no resource is recovered, a large amount of land resources are occupied, and the benefit is zero; the incineration treatment technology has high difficulty, large one-time investment and high later maintenance cost; the anaerobic digestion investment is high, the methane yield is low, the economic benefit cannot be self-sufficient (the comparison of seven sludge treatment and disposal process technologies published in the 2015 year by the Polaris environment protection network), and the applicability degree of small-volume items in villages and small towns is poor.

SUMMERY OF THE UTILITY MODEL

The utility model provides a regional organic waste cooperative treatment system, which aims to solve the problems that the anaerobic fermentation is mainly used for treating kitchen waste at present, but an anaerobic treatment system is huge, the investment is high and the like.

In order to solve the technical problems, the utility model adopts the following technical scheme:

a regional organic waste cooperative treatment system comprises a kitchen waste bin, a lifting screw machine, a crushing and sorting pulping machine, a slurry dehydrator, a solid-phase conveyor, a waste liquid collecting tank, a sludge bin, an auxiliary material bin, a feeding conveyor, a mixer, a feeder, a pushing conveyor, an aerobic fermentation device, a discharging conveyor, a fan, a temporary storage tank, a material lifting machine, a screening machine, an impurity conveyor, a product conveyor and a deodorization device; the lifting screw comprises a first lifting screw and a second lifting screw; the kitchen waste bin is connected with the first lifting screw machine; the first lifting screw machine is connected with the second lifting screw machine; the second lifting screw machine is connected with the crushing, sorting and pulping machine; the crushing and sorting pulping machine is connected with the slurry dehydrator; the slurry dehydrator is connected with the solid-phase conveyor; the waste liquid collecting pool is connected with the kitchen waste bin, the first lifting screw machine, the second lifting screw machine and the slurry dehydrator; the feeding conveyor is connected with the solid-phase conveyor, the sludge bin, the auxiliary material bin and the mixer; the mixer is connected with the feeder; the feeder is connected with the pushing conveyor; the material pushing conveyor is connected with the aerobic fermentation device; the aerobic fermentation device is connected with the discharging conveyor and the air supply machine; the discharging conveyor is connected with a temporary storage pool, and the temporary storage pool is connected with a material lifting machine; the material lifting machine is connected with the sieving machine; the screening machine is connected with the impurity conveyor and the product conveyor; the deodorization device is connected with the aerobic fermentation device and the temporary storage tank.

Furthermore, the first lifting screw machine and the second lifting screw machine both adopt shaftless screws.

Furthermore, the crushing and sorting pulping machine comprises a motor, a cylinder, an inner cylinder, a screen, a main shaft, a steel hammer, a slurry collecting box, an air compression system, a feeding hole, a slurry dehydrator, a slurry outlet, a discharging hole and an impurity outlet.

Furthermore, the aerobic fermentation device comprises a cylinder, a two-gear tug transmission system, a mixed shoveling plate system, an aeration system, an online monitoring system, a control system, a feeding port, a discharging cover and a discharging port.

Furthermore, the cylinder body is made of carbon steel.

Furthermore, the inner diameter of the cylinder body is phi 2.6m, the length is 30m, and the inclination of the axial lead is 3%.

Furthermore, the feed inlet adopts a flange opening with the length and the width of 450mm and 450 mm;

furthermore, a discharge valve is arranged at the discharge hole.

The utility model has the following advantages:

(1) the regional organic waste cooperative treatment system has the advantages of good treatment effect and short treatment period, the fermentation period is shortened to 5-7 days from more than 20 days in the prior art, the garbage recycling turnover rate is up to more than 99%, and the regional organic waste cooperative treatment system also has the advantages of high automation degree, safe process, no secondary pollution to the environment and the like.

(2) Aiming at small-area projects, the sludge and the kitchen waste are pretreated and then mixed and are subjected to aerobic fermentation treatment to generate the fertilizer, and 100% of the fertilizer is completely recycled in a small-area. The generated garbage is subjected to harmless and stable treatment to generate incremental wealth; meanwhile, the method saves the garbage transfer cost generated by outward transportation and centralized treatment of the garbage, reduces the centralized treatment pressure, and is an important effective means for thoroughly solving the problem of regional organic wastes.

Drawings

FIG. 1 is a block diagram schematically illustrating a structure of a system for co-processing a regional organic waste according to the present invention.

Fig. 2 is a schematic layout of the regional organic waste co-processing system of the present invention.

In fig. 2: 1-kitchen waste bin; 2-1 is a first lifting screw machine; 2-2 is a second lifting screw machine; 3-crushing, sorting and pulping machine; 4-slurry dewatering machine; 5-a solid phase conveyor; 6-a waste liquid collecting tank; 7-a sludge bin; 8-an auxiliary material bin; 9-a feed conveyor; 10-a mixer; 11-a feeder; 12-a pusher conveyor; 13-an aerobic fermentation device; 14-a discharge conveyor; 15-a fan; 16-temporary storage pool; 17-a material lifting machine; 18-screening machine; 19-a trash conveyor; 20-a product conveyor; 21-deodorizing device

FIG. 3 is a schematic diagram of the application of the system for the cooperative treatment of organic waste in a region of the present invention.

FIG. 4 is a schematic view of the process flow of the application and treatment of the system for the co-treatment of the regional organic waste of the present invention.

Detailed Description

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

Examples

As shown in fig. 1 and 2, a regional organic waste cooperative treatment system comprises a kitchen waste bin 1, a lifting screw machine, a crushing and sorting pulping machine 3, a slurry dewatering machine 4, a solid-phase conveyor 5, a waste liquid collecting tank 6, a sludge bin 7, an auxiliary material bin 8, a feeding conveyor 9, a mixer 10, a feeder 11, a pushing conveyor 12, an aerobic fermentation device 13, a discharging conveyor 14, an air supply machine 15, a temporary storage tank 16, a material lifting machine 17, a screening machine 18, an impurity conveyor 19, a product conveyor 20 and a deodorization device 21; the lifting screw comprises a first lifting screw 2-1 and a second lifting screw 2-2; the kitchen waste bin 1 is connected with a first lifting screw machine 2-1; the first lifting screw machine 2-1 is connected with the second lifting screw machine 2-2; the second lifting screw machine 2-2 is connected with a crushing, sorting and pulping machine 3; the crushing, sorting and pulping machine 3 is connected with the slurry dehydrator 4; the slurry dehydrator 4 is connected with the solid-phase conveyor 5; the waste liquid collecting tank 6 is connected with the kitchen waste bin 1, the first lifting screw machine 2-1, the second lifting screw machine 2-2 and the slurry dehydrator 4; the feeding conveyor 9 is connected with the solid-phase conveyor 5, the sludge bin 7, the auxiliary material bin 8 and the mixer 10; the mixer 10 is connected with a feeder 11; the feeder 11 is connected with a pushing conveyor 12; the pushing conveyor 12 is connected with an aerobic fermentation device 13; the aerobic fermentation device 13 is connected with a discharging conveyor 14 and a fan 15; the discharging conveyor 14 is connected with a temporary storage pool 16, and the temporary storage pool 16 is connected with a material lifting machine 17; the material lifting machine 17 is connected with a screening machine 18; the screening machine 18 is connected with an impurity conveyor 19 and a product conveyor 20; the deodorization device 21 is connected with the aerobic fermentation device 13 and the temporary storage tank 16.

Carry kitchen garbage's first promotion screw, second promotion screw all adopt shaftless spiral, prevent kitchen garbage's material winding. The bottom of first promotion screw, second promotion screw all sets up waterlogging caused by excessive rainfall graticule and delivery port, rolls at kitchen garbage's material transportation process and goes out the profit drippage, eliminates high salinity, grease as far as possible to follow-up fermentation reaction's that goes on in aerobic fermentation device adverse effect.

The crushing, sorting and pulping machine comprises a motor, a cylinder, an inner cylinder, a screen, a main shaft, a steel hammer, a slurry collecting box, an air compression system, a feeding hole, a slurry outlet, a discharging hole and an impurity outlet. A motor-driven main shaft is arranged in the cylinder, a feed inlet is arranged at the upper part of the cylinder, and an impurity outlet is arranged at the lower part of the tail part of the cylinder; an inner cylinder which has a certain distance with the outer wall of the cylinder body is arranged in the cylinder body, and a screen is arranged at the lower part of the inner cylinder; a slurry outlet is arranged below a cavity between the screen and the outer wall of the cylinder body, slurry enters a slurry collecting box below the cylinder body through the slurry outlet, and the slurry in the slurry collecting box is conveyed to the rear end through an external air compression system; two rows of steel hammers are spirally arranged on the main shaft, and the steel hammers have an inclination angle of 8-10 degrees relative to a vertical plane of the main shaft. The aperture of the screen is 15-25 mm. The motor drives the main shaft to rotate at a high speed to drive the steel hammer, kitchen waste materials fed from a feed port (a square flange port with the length multiplied by 480 mm) are crushed, the crushed kitchen waste materials are thrown to a screen under the action of centrifugal force, the kitchen waste materials smaller than the screen hole enter a cavity between an inner cylinder and a cylinder body through the screen, enter a slurry collecting box below through a slurry outlet (DN150 round hole), are pumped out by an air compression system, pass through a discharge port (DN150 round hole), and are fed into a slurry dehydrator; the steel hammer has a certain inclination angle, generates a certain thrust in the rotating process, and pushes the impurities which cannot be crushed and the kitchen waste materials which are larger than the screen holes to an impurity outlet (a square opening with the length multiplied by the width of 200 multiplied by 400 mm) to be discharged. The aperture of the screen is 25mm at the feed inlet section, gradually becomes 15mm along the kitchen waste material conveying direction, and the hole distance is evenly distributed at 15 mm. The material of the part in contact with the kitchen waste material is stainless steel.

The main machine structure of the slurry dehydrator is a screen filtering type centrifuge, and the slurry dehydrator has the functions of centrifugal concentration and dehydration. The rotating speed of the cylindrical spiral is 1500r/min, the cylindrical spiral is adjustable in a stepless mode, the outer diameter is 298mm, and the effective length is 900 mm. The inner diameter of the screen mesh is phi 300mm, the filtering gap of the screen cylinder is 1mm, the screen cylinder and the spiral are 304 stainless steel, and the solid content of the treated solid is more than or equal to 20 percent. The feed inlet DN80, the solid discharge outlet is a long opening with the length multiplied by the width equal to 110 multiplied by 250mm, and the liquid outlet is a DN150 round hole.

The crushing, sorting and pulping machine can simultaneously realize material crushing, pulping and light substance impurity separation of the kitchen waste, the integration degree of the equipment is high, the material crushing of the kitchen waste is uniform, and more than 90% of the kitchen waste materials are crushed into particles with the particle size of 15-25 mm.

The mixer realizes the mixing of the kitchen solid-phase substances, the sludge and the auxiliary materials. The motor reducer rotates to drive the transmission shaft to rotate, and the mixing blades distributed on the rotating shaft in a staggered mode rotate together, so that the mixture is cut, thrown and mixed, and is pushed forward.

The aerobic fermentation device comprises a cylinder, two-gear tug wheels, a transmission system, a mixed shoveling plate system, an aeration system, an online monitoring system, a control system, a feeding port, a discharging cover and a discharging port. The cylinder body is installed in a 3% gradient manner and rotates through an external transmission system; the high end of the cylinder body is a feeding hole, the low end of the cylinder body is a discharging hole, and a discharging cover is arranged outside the discharging hole; the inner wall of the cylinder body is provided with 8 rows of mixed shoveling plate systems; two-gear tugs are arranged outside the cylinder body for supporting; the aeration system is arranged near the discharge end of the cylinder and is used for introducing air into the cylinder through aeration holes formed in the cylinder; the online monitoring system comprises an online monitoring instrument, the barrel is provided with the online monitoring instruments for temperature, air quantity and the like, and the control system realizes intelligent ventilation and online operation of materials in the barrel through the online monitoring system and the aeration system. The cylinder, the two-gear tug and the transmission system realize the operation of equipment; the mixing shoveling plate system realizes mixing, propulsion and mass transfer of materials; the aeration system, the on-line monitoring system and the control system realize intelligent ventilation and automatic control operation of the stack. The cylinder body is a single-layer cylinder body made of carbon steel and integrally welded, the inner diameter is phi 2.6m, the length is 30m, and the inclination of the axial lead is 3%. Labyrinth sealing is adopted between the front end and the feeding cover, and a flange opening of 450 multiplied by 450mm is adopted as a feeding opening; the discharge cover is welded with the cylinder body, a flange opening with the diameter of 800 multiplied by 800mm is adopted as a discharge opening, and a discharge valve is arranged at the discharge opening.

The material copying plate is arranged in the roller of the aerobic fermentation device, and the materials of the kitchen waste are fully and uniformly turned through the combined action of the continuous rotation of the roller and the material copying plate, so that the dynamic high-temperature aerobic fermentation of the continuous feeding and continuous discharging of the materials of the kitchen waste is realized. Become strict airtight environment and intelligent ventilation with the cylinder design, both can guarantee the oxygen supply of air feed machine to aerobic fermentation device, can discharge foul smell and vapor again, wherein the foul smell adopts the foul smell collecting pipe to collect, recycles deodorizing device and handles, realizes that kitchen garbage's material fermentation cycle shortens to 5 ~ 7 days by more than traditional 20 days, solves the big problem of foul smell simultaneously.

As shown in fig. 3 and 4, the application processing process flow of the regional organic waste cooperative processing system of the present invention includes the following steps:

the method comprises the following steps: the kitchen waste is weighed and then directly poured into a kitchen waste bin, after temporary storage, buffering and water filtration of materials, the residual materials are pushed out by the spiral at the bottom of the kitchen waste bin and then are conveyed to a crushing and sorting pulping machine sequentially through a first lifting screw machine and a second lifting screw machine.

Step two: the filter liquor filtered by the screw machine at the bottom of the kitchen waste bin, the first lifting screw machine and the second lifting screw machine automatically flows into the waste liquid collecting tank through the pipeline, and the waste liquid collected by the waste liquid collecting tank is discharged after reaching the standard through the treatment of a sewage treatment plant.

Step three: the kitchen waste conveyed by the first lifting screw machine and the second lifting screw machine is crushed into slurry by a steel hammer rotating at a high speed in a rotary drum of the crushing and sorting pulping machine, the slurry is thrown onto a screen on the inner side of the wall of the rotary drum by utilizing centrifugal force, the slurry smaller than a screen hole enters a slurry collecting box at the lower end, light substances larger than the screen hole and part of other impurities (plastic, fiber and the like) which are not easy to crush are discharged to an impurity outlet to be separated, and the impurities are transported to be burned or buried.

Step four: the light impurities separated by the crushing, separating and pulping machine enter the impurity collecting box.

Step five: slurry after the slurry is crushed in the slurry collecting box is pumped into a slurry dehydrator at the rear end through an air compression system of the crushing and sorting pulping machine for dehydration and separation; sending the separated kitchen waste pretreatment solid-phase material into a feeding conveyor through a solid-phase conveyor; the separated liquid phase automatically flows into a waste liquid collecting tank through a pipeline, and waste liquid collected by the waste liquid collecting tank is discharged after being treated by a sewage treatment plant and reaching the standard.

Step six: temporarily storing the sludge transported to the field in a sludge bin, stacking auxiliary materials such as outsourced conditioning materials of straws, sawdust, mushroom residues and the like in an auxiliary material stacking area, and sending the auxiliary materials to the auxiliary material bin as required.

Step seven: the sludge, the auxiliary materials and the kitchen waste pretreatment solid-phase materials are respectively conveyed to a mixer through a feeding conveyor according to the proportion that the adding amount of the auxiliary materials is less than or equal to 10 percent of the material amount, the C/N ratio (carbon-nitrogen ratio) of the mixed materials is adjusted to 20-30: 1, the water content is adjusted to 50-60 percent and the pH value is as follows: 6-8.5, and adjusting the fermentation temperature to be within the proper range of aerobic fermentation.

Step eight: the mixed materials are sent into a rotary high-temperature aerobic fermentation device for fermentation through a feeder and a pushing conveyor.

Step nine: the air supply machine aerates the materials through the aeration device on the side wall of the roller in the fermentation process, so that the aerobic environment is ensured.

Step ten: and (3) conveying the odor and the water vapor generated in the fermentation process into a deodorizing device through a pipeline, uniformly treating the odor and the water vapor to be lower than the secondary standard of the national odor pollution emission standard (GB-14554-93), and then discharging.

Step eleven: and conveying the fermented discharged materials to a temporary storage tank through a discharge conveyor for secondary stacking, conveying odor and water vapor generated by the materials stacked in the temporary storage tank to a deodorizing device through a pipeline, uniformly treating the odor and the water vapor to be lower than the secondary standard of the national odor pollution emission standard (GB-14554-93), and then discharging.

Step twelve: and feeding the discharged materials after secondary stacking into a sieving machine for sieving through a material lifting machine. Collecting oversize materials larger than 10mm as impurities by an impurity conveyor, and carrying out outward transportation incineration or landfill on the collected impurities; and the undersize products smaller than 10mm are transported outside the product conveyor as products for resource utilization.

It will be evident to those skilled in the art that the utility model is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the utility model being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Although the present description is described in terms of embodiments, not every embodiment includes only a single embodiment, and such description is for clarity only, and those skilled in the art should be able to integrate the description as a whole, and the embodiments can be appropriately combined to form other embodiments as will be understood by those skilled in the art.

Claims

1. A regional organic waste cooperative treatment system is characterized by comprising a kitchen waste bin, a lifting screw machine, a crushing and sorting pulping machine, a slurry dehydrator, a solid-phase conveyor, a waste liquid collecting tank, a sludge bin, an auxiliary material bin, a feeding conveyor, a mixer, a feeder, a pushing conveyor, an aerobic fermentation device, a discharging conveyor, a fan, a temporary storage tank, a material lifting machine, a screening machine, an impurity conveyor, a product conveyor and a deodorization device; the lifting screw comprises a first lifting screw and a second lifting screw; the kitchen waste bin is connected with the first lifting screw machine; the first lifting screw machine is connected with the second lifting screw machine; the second lifting screw machine is connected with the crushing, sorting and pulping machine; the crushing and sorting pulping machine is connected with the slurry dehydrator; the slurry dehydrator is connected with the solid-phase conveyor; the waste liquid collecting pool is connected with the kitchen waste bin, the first lifting screw machine, the second lifting screw machine and the slurry dehydrator; the feeding conveyor is connected with the solid-phase conveyor, the sludge bin, the auxiliary material bin and the mixer; the mixer is connected with the feeder; the feeder is connected with the pushing conveyor; the material pushing conveyor is connected with the aerobic fermentation device; the aerobic fermentation device is connected with the discharging conveyor and the air supply machine; the discharging conveyor is connected with a temporary storage pool, and the temporary storage pool is connected with a material lifting machine; the material lifting machine is connected with the sieving machine; the screening machine is connected with the impurity conveyor and the product conveyor; the deodorization device is connected with the aerobic fermentation device and the temporary storage tank.

2. The system of claim 1, wherein the first and second screw lifters each employ a shaftless screw.

3. The regional organic waste cooperative treatment system according to claim 1, wherein the crushing and sorting pulper comprises a motor, a cylinder, an inner cylinder, a screen, a main shaft, a steel hammer, a slurry collecting box, an air compression system, a feeding hole, a slurry dehydrator, a slurry outlet, a discharging hole and an impurity outlet.

4. The regional organic waste cooperative treatment system according to claim 1, wherein the aerobic fermentation device comprises a cylinder, a two-gear tug transmission system, a mixing shoveling plate system, an aeration system, an online monitoring system, a control system, a feeding port, a discharging cover and a discharging port.

5. The system for the cooperative treatment of the regional organic waste as claimed in claim 4, wherein the material of the cylinder is carbon steel.

6. The system for the cooperative treatment of the organic waste in the area according to claim 5, wherein the inner diameter of the cylinder is 2.6m, the length of the cylinder is 30m, and the inclination of the axial line is 3%.

7. The system for the cooperative treatment of the regional organic wastes according to claim 4, wherein the material inlet adopts a flange port with the length x the width of 450 x 450 mm.

8. The regional organic waste co-processing system according to claim 4, wherein the discharge port is provided with a discharge valve.