Old garbage screening system

Abstract

The utility model provides an stale garbage screening system which comprises a first screening mechanism, a second screening mechanism and a third screening mechanism, the first screening mechanism is used for screening out large blocks in untreated stale garbage and conveying the screened stale garbage, the second screening mechanism is used for screening out large blocks in the untreated stale garbage, and the third screening mechanism is used for screening out large blocks in the untreated stale garbage. The second screening mechanism is arranged at the output end of the first screening mechanism and used for screening out humus in the stale garbage conveyed by the first screening mechanism and conveying the screened stale garbage. And the third screening mechanism is arranged at the output end of the second screening mechanism and used for screening out heavy substances in the stale garbage conveyed by the second screening mechanism and conveying the screened stale garbage into the stale garbage collecting mechanism. The stale garbage screening system can effectively improve the heat value of stale garbage, and can effectively solve the technical problem of how to improve the processing efficiency of the stale garbage in the prior art.

Description

Technical Field

[0001] The utility model relates to the technical field of stale garbage treatment, in particular to a stale garbage screening system. Background Art

[0002] With the acceleration of urbanization, the amount of garbage generated in cities is also increasing. However, the storage capacity of sanitary landfills, one of the main ways to deal with urban garbage, can no longer meet the actual needs, and some landfills have leachate leakage, which poses a risk of pollution to the surrounding environment.

[0003] To solve this problem, this part of the landfill needs to be vacated. However, since the garbage has been piled up in the landfill for a long time, the easily decomposable organic matter has been decomposed into humus, which leads to a large amount of humus and water in the garbage, making its calorific value low and not suitable for direct incineration. Therefore, many domestic waste incineration plants will mix these stale garbage with domestic waste when incinerating them, and in order to avoid the humus and water in the stale garbage causing the furnace temperature to not meet the standard, they can only be mixed with a small proportion. Using this method to treat stale garbage will reduce the treatment efficiency of stale garbage and increase the cost of treatment. Summary of the invention

[0004] The purpose of the utility model is to overcome the above technical deficiencies and provide a stale garbage screening system to solve the technical problem of how to improve the processing efficiency of stale garbage in the prior art.

[0005] To achieve the above technical objectives, according to one aspect of the utility model: a stale garbage screening system is provided, which includes: a first screening mechanism, a second screening mechanism and a third screening mechanism, the first screening mechanism is used to screen out large pieces of untreated stale garbage, and transport the screened stale garbage; the second screening mechanism is arranged at the output end of the first screening mechanism, and is used to screen out humus in the stale garbage transported by the first screening mechanism, and transport the screened stale garbage; the third screening mechanism is arranged at the output end of the second screening mechanism, and the third screening mechanism is used to screen out heavy objects in the stale garbage transported by the second screening mechanism, and transport the screened stale garbage to the stale garbage collection mechanism; wherein the second screening mechanism includes at least two disc screen screening units, and the disc screen screening unit is used to screen out humus in the stale garbage; a plurality of disc screen screening units are arranged in steps along the transport direction of the stale garbage screening system.

[0006] Furthermore, the third screening mechanism includes: a bouncing belt conveyor and a fan assembly, one end of the bouncing belt conveyor is arranged below the output end of the second screening mechanism, and the other end of the bouncing belt conveyor is close to the output end of the stale garbage screening system, and there is a first preset angle between the extension direction from one end of the bouncing belt conveyor to the other end of the bouncing belt conveyor and the conveying direction of the stale garbage screening system; the bouncing belt conveyor is used to screen out the heavy objects in the stale garbage after the second screening, and convey the screened stale garbage to the output end of the stale garbage screening system; the fan assembly is arranged at the port of the bouncing belt conveyor close to the output end of the second screening mechanism, and the air outlet of the fan assembly is arranged toward the bouncing belt conveyor, so that the high-pressure wind coming out of the air outlet of the fan assembly drives the light objects in the stale garbage to move toward the output end of the stale garbage screening system; wherein, the port at one end of the bouncing belt conveyor is the first output port of the bouncing belt conveyor, and the port at the other end of the bouncing belt conveyor is the second output port of the bouncing belt conveyor.

[0007] Furthermore, the bouncing belt conveyor is provided with a bouncing section, in which a plurality of bouncing rollers are arranged at intervals along the extension direction of the bouncing belt conveyor, and the plurality of bouncing rollers are all located below the conveyor belt of the bouncing belt conveyor. The conveyor belt of the bouncing belt conveyor rotates to the bouncing section to form periodic up and down fluctuations through the plurality of bouncing rollers, so as to bounce up the heavy objects in the stale garbage; wherein the bounced heavy objects move toward the direction of the first output port of the bouncing belt conveyor.

[0008] Furthermore, the third screening mechanism also includes: a mesh box, which is mounted on the bouncing belt conveyor, and the two sides of the mesh box are respectively connected to the two sides of the bouncing belt conveyor, and the mesh box and at least part of the bouncing belt conveyor form an anti-flying channel to allow light objects in the stale garbage to move to the second output port of the bouncing belt conveyor.

[0009] Furthermore, the third screening mechanism also includes: a fly-proof cover, which forms the output end of the stale garbage screening system, the input port of the fly-proof cover is connected to the second output port of the bouncing belt conveyor, the output port of the fly-proof cover is set toward the direction of the stale garbage collection mechanism, and the fly-proof cover is located above the stale garbage collection mechanism.

[0010] Furthermore, the third screening mechanism also includes: a heavy object transfer belt conveyor, which is arranged below the first output port of the bouncing belt conveyor, and the conveyor belt of the heavy object transfer belt conveyor is arranged corresponding to the first output port of the bouncing belt conveyor. The heavy object transfer belt conveyor is used to receive the heavy objects screened out from the bouncing belt conveyor and transport the heavy objects to the next process.

[0011] Furthermore, the second screening mechanism includes a first disc screen screening unit, a second disc screen screening unit and a third disc screen screening unit which are arranged in steps along the conveying direction of the stale garbage screening system, the input end of the first disc screen screening unit is located below the output end of the first screening mechanism, the input end of the second disc screen screening unit is located below the output end of the first disc screen screening unit, and the input end of the third disc screen screening unit is located below the output end of the second disc screen screening unit.

[0012] Furthermore, the second screening mechanism also includes: a disc screen underflow collecting belt conveyor, which is located below the first disc screen screening unit, the second disc screen screening unit and the third disc screen screening unit, and the sieve plates of the first disc screen screening unit, the second disc screen screening unit and the third disc screen screening unit are all arranged corresponding to the conveyor belt of the disc screen underflow collecting belt conveyor, and the disc screen underflow collecting belt conveyor is used to transport the screened humus soil.

[0013] Furthermore, the second screening mechanism also includes: a humus transfer belt conveyor, which is arranged below the output port of the disc screen undersize collection belt conveyor, and the conveyor belt of the humus transfer belt conveyor is arranged corresponding to the output port of the disc screen undersize collection belt conveyor, and the humus transfer belt conveyor is used to transport the humus to the next process.

[0014] Furthermore, the first screening mechanism includes: a plate conveyor and a manual hand-picking belt conveyor, the plate conveyor forms the input end of the stale garbage screening system, and is used to convey unprocessed stale garbage; the input end of the manual hand-picking belt conveyor is located below the plate conveyor, and the output end of the manual hand-picking belt conveyor forms the output end of the first screening mechanism, and the manual hand-picking belt conveyor is used to screen out large blocks in the unprocessed stale garbage, and transport the screened stale garbage to the second screening mechanism.

[0015] Beneficial effects:

[0016] By applying the technical solution of the utility model, the stale garbage screening system provided by the utility model can screen the stale garbage multiple times by simply setting the first screening mechanism, the second screening mechanism and the third screening mechanism, and the first screening mechanism, the second screening mechanism and the third screening mechanism are connected in sequence along the conveying direction of the stale garbage screening system, so that the large pieces, the humus with low calorific value and the heavy objects with low calorific value in the stale garbage can be effectively separated through multiple screening, thereby improving the calorific value of the stale garbage, meeting the temperature requirements of the incinerator, realizing large-scale incineration, greatly improving the garbage treatment efficiency, and reducing the treatment cost and improving the treatment efficiency of the stale garbage. At the same time, through multiple screening, harmful or non-recyclable stale garbage can be effectively separated, which helps to reduce pollution to the environment. At the same time, for recyclable stale garbage, through effective classification and treatment, it helps to save resources and achieve recycling.

[0017] In addition, the second screening mechanism includes at least two disc screen screening units, and the plurality of disc screen screening units are arranged in steps along the conveying direction of the stale garbage screening system. By arranging the plurality of disc screen screening units in steps along the conveying direction of the stale garbage screening system, the humus in the stale garbage can be screened multiple times, which can further improve the accuracy of screening humus, further reduce the content of humus in the stale garbage, and thus improve the calorific value of the stale garbage. In addition, the plurality of disc screen screening units are arranged in steps, so that the stale garbage can be turned over when it is transported from one disc screen screening unit among the plurality of disc screen screening units to another disc screen screening unit, so that the stale garbage can be loosened better during the transmission process, reducing accumulation and adhesion, and reducing the risk of clogging of the disc screen screening unit. And the stale garbage can be better dispersed and evenly distributed during the transmission process, so that the humus can be screened more fully, thereby improving the screening efficiency of the second screening mechanism. The stale garbage screening system has a simple structure and is easy to operate. It can quickly remove large pieces of stale garbage that cannot enter the furnace, some humus with low calorific value, and some heavy objects with low calorific value. It can effectively increase the calorific value of the stale garbage and effectively solve the technical problem of how to improve the treatment efficiency of stale garbage in the prior art. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 A schematic diagram showing a first perspective of an embodiment of a stale garbage screening system according to the utility model;

[0019] Figure 2 A second viewing angle schematic diagram of an embodiment of the stale garbage screening system according to the utility model is shown.

[0020] The above drawings include the following reference numerals:

[0021] 1. First screening mechanism; 11. Plate conveyor; 12. Manual hand-picking belt conveyor; 13. Manual sorting platform; 2. Second screening mechanism; 21. First disc screen screening unit; 22. Second disc screen screening unit; 23. Third disc screen screening unit; 24. Disc screen under-screening collection belt conveyor; 25. Humus soil transfer belt conveyor; 26. Garbage transfer and conveying belt conveyor; 3. Third screening mechanism; 31. Bouncing belt conveyor; 311. First output port; 312. Second output port; 313. Bouncing roller; 32. Fan assembly; 321. Air outlet; 33. Net box; 34. Anti-fly cover; 35. Heavy object transfer belt conveyor; 100. Ground. DETAILED DESCRIPTION

[0022] In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present application.

[0023] See also Figure 1 and Figure 2 According to an embodiment of the utility model, a stale garbage screening system is provided, which includes: a first screening mechanism 1, a second screening mechanism 2 and a third screening mechanism 3, wherein the first screening mechanism 1 is used to screen out large pieces of unprocessed stale garbage and transport the screened stale garbage; the second screening mechanism 2 is arranged at the output end of the first screening mechanism 1, and is used to screen out humus soil in the stale garbage transported by the first screening mechanism 1, and transport the screened stale garbage; the third screening mechanism 3 is arranged at the output end of the second screening mechanism 2, and the third screening mechanism 3 is used to screen out heavy objects in the stale garbage transported by the second screening mechanism 2, and transport the screened stale garbage to the stale garbage collection mechanism; wherein the second screening mechanism 2 includes at least two disc screen screening units, and the disc screen screening unit is used to screen out humus soil in the stale garbage; and a plurality of disc screen screening units are arranged in steps along the transport direction of the stale garbage screening system.

[0024] It can be seen that the stale garbage screening system provided by the utility model can screen the stale garbage multiple times by simply setting the first screening mechanism 1, the second screening mechanism 2 and the third screening mechanism 3, and the first screening mechanism 1, the second screening mechanism 2 and the third screening mechanism 3 are connected in sequence along the conveying direction of the stale garbage screening system, so that the stale garbage can be screened multiple times, so that the large pieces, the humus with low calorific value and the heavy objects with low calorific value in the stale garbage can be effectively separated through multiple screening, thereby improving the calorific value of the stale garbage, meeting the temperature requirements of the incinerator, realizing large-scale incineration, greatly improving the garbage treatment efficiency, and reducing the treatment cost and improving the treatment efficiency of the stale garbage. At the same time, through multiple screening, harmful or non-recyclable stale garbage can be effectively separated, which helps to reduce pollution to the environment. At the same time, for recyclable stale garbage, through effective classification and treatment, it helps to save resources and achieve recycling.

[0025] In addition, the second screening mechanism 2 includes at least two disc screen screening units, and the plurality of disc screen screening units are arranged in steps along the conveying direction of the stale garbage screening system. By arranging the plurality of disc screen screening units in steps along the conveying direction of the stale garbage screening system, the humus in the stale garbage can be screened multiple times, which can further improve the accuracy of screening humus, further reduce the content of humus in the stale garbage, and thus improve the calorific value of the stale garbage. In addition, the plurality of disc screen screening units are arranged in steps, so that the stale garbage can be turned over when it is transported from one disc screen screening unit among the plurality of disc screen screening units to another disc screen screening unit, so that the stale garbage can be loosened better during the transmission process, reducing accumulation and adhesion, and reducing the risk of clogging of the disc screen screening unit. And the stale garbage can be better dispersed and evenly distributed during the transmission process, so that the humus can be screened more fully, thereby improving the screening efficiency of the second screening mechanism. The stale garbage screening system has a simple structure and is easy to operate. It can quickly remove large pieces of stale garbage that cannot enter the furnace, some humus with low calorific value, and some heavy objects with low calorific value. It can effectively increase the calorific value of the stale garbage and effectively solve the technical problem of how to improve the treatment efficiency of stale garbage in the prior art.

[0026] The "screened stale garbage" in "the first screening mechanism 1 is used to screen out the large pieces of untreated stale garbage, and to transport the screened stale garbage." refers to the stale garbage remaining after the large pieces are screened out. The "screened stale garbage" in "the second screening mechanism 2 is arranged at the output end of the first screening mechanism 1, and is used to screen out the humus soil in the stale garbage transported by the first screening mechanism 1, and to transport the screened stale garbage." refers to the stale garbage remaining after the humus soil is screened out. The "screened stale garbage" in "the third screening mechanism 3 is arranged at the output end of the second screening mechanism 2, and the third screening mechanism 3 is used to screen out the heavy objects in the stale garbage transported by the second screening mechanism 2, and to transport the screened stale garbage to the stale garbage collection mechanism." refers to the stale garbage remaining after the heavy objects are screened out.

[0027] Among them, "large pieces of stale garbage" refers to stale garbage with a particle size greater than 350mm that cannot enter the furnace. The purpose is to prevent large pieces of stale garbage from damaging the incinerator and affecting the normal operation of the incinerator.

[0028] like Figure 1 As shown, the conveying direction of the stale garbage screening system is along the direction indicated by arrow A.

[0029] Among them, the heavy objects in the stale garbage refer to materials with higher density and heavier weight. These heavy objects may include metal, glass, stone, concrete fragments, bottles and other garbage.

[0030] In actual working process, the stale garbage collection mechanism can be a collection box or a collection bag, or can be directly on the ground 100.

[0031] Preferably, the stale garbage collection mechanism is the ground 100 , and the stale garbage coming out of the output end of the third screening mechanism 3 is directly piled up on the ground 100 .

[0032] In this embodiment, if Figure 1As shown, the third screening mechanism 3 includes: a bouncing belt conveyor 31 and a fan assembly 32, one end of the bouncing belt conveyor 31 is arranged below the output end of the second screening mechanism 2, and the other end of the bouncing belt conveyor 31 is close to the output end of the stale garbage screening system, and the extension direction from one end of the bouncing belt conveyor 31 to the other end of the bouncing belt conveyor 31 and the conveying direction of the stale garbage screening system have a first preset angle; the bouncing belt conveyor 31 is used to screen out the heavy objects in the stale garbage after the second screening, and convey the screened stale garbage to the stale garbage screening system. The output end of the system; the fan assembly 32 is arranged at the port of the bouncing belt conveyor 31 close to the output end of the second screening mechanism 2, and the air outlet 321 of the fan assembly 32 is arranged toward the bouncing belt conveyor 31, so that the high-pressure wind coming out of the air outlet 321 of the fan assembly 32 drives the light objects in the stale garbage to move toward the output end of the stale garbage screening system; wherein, the port at one end of the bouncing belt conveyor 31 is the first output port 311 of the bouncing belt conveyor 31, and the port at the other end of the bouncing belt conveyor 31 is the second output port 312 of the bouncing belt conveyor 31.

[0033] In actual operation, the fan in the fan assembly 32 is a variable frequency speed regulating fan, and the wind speed is adjustable.

[0034] In the specific implementation process, there is a first preset angle between the extension direction from one end of the bouncing belt conveyor 31 to the other end of the bouncing belt conveyor 31 and the conveying direction of the stale garbage screening system, and the first preset angle is greater than or equal to 20° and less than or equal to 30°. Such a structural setting is adopted to adjust the angle of the bouncing belt conveyor 31 relative to the conveying direction of the stale garbage screening system according to the working conditions, thereby improving the efficiency of the bouncing belt conveyor 31 in screening heavy objects.

[0035] In actual working process, the angle of the bouncing belt conveyor 31 relative to the conveying direction of the stale garbage screening system can be adjusted according to working conditions, and the angle of the bouncing belt conveyor 31 relative to the conveying direction of the stale garbage screening system can be adjusted between 20° and 30° (including 20° and 30°). At the same time, the conveying belt speed of the bouncing belt conveyor 31 can be adjusted between 2-3m / s.

[0036] In the specific implementation process, Figure 1As shown, the bouncing belt conveyor 31 has a bouncing section, and a plurality of bouncing rollers 313 are arranged at intervals in the bouncing section along the extension direction of the bouncing belt conveyor 31. The plurality of bouncing rollers 313 are all located below the conveyor belt of the bouncing belt conveyor 31. The conveyor belt of the bouncing belt conveyor 31 rotates to the bouncing section to form periodic up and down fluctuations through the plurality of bouncing rollers 313, so as to bounce up the heavy objects in the stale garbage; wherein the bounced heavy objects move toward the first output port 311 of the bouncing belt conveyor 31. With such a structural arrangement, the conveyor belt of the bouncing belt conveyor 31 rotates to the bouncing section to form periodic up and down fluctuations through the plurality of bouncing rollers 313, thereby screening out the heavy objects in the stale garbage, thereby further improving the calorific value of the stale garbage.

[0037] In actual working process, the bouncing section is located at one end of the bouncing belt conveyor 31, the length of the bouncing section extends along the extension direction from one end of the bouncing belt conveyor 31 to the other end of the bouncing belt conveyor 31, and a plurality of bouncing rollers 313 are evenly spaced along the extension direction of the length of the bouncing section, and at least part of the bouncing section is the drop area of ​​the bouncing belt conveyor 31. The drop area refers to the area where the stale garbage transported by the second screening mechanism 2 falls on the bouncing belt conveyor 31.

[0038] Preferably, the bouncing section is a material dropping area of ​​the bouncing belt conveyor 31 .

[0039] In the actual work process, Figure 1 As shown, the second output port 312 of the bouncing belt conveyor 31 to the first output port 311 of the bouncing belt conveyor 31 is inclined downward relative to the horizontal plane. Since the conveyor belt rotated to the material drop zone forms periodic up and down fluctuations through multiple bouncing rollers 313 (that is, the conveyor belt rotated to the material drop zone forms wave jumping), when the stale garbage falls from the output end of the second screening mechanism 2 to the material drop zone of the bouncing belt conveyor 31, as the conveyor belt of the bouncing belt conveyor 31 transports the stale garbage that falls to the material drop zone to the second output port 312 of the bouncing belt conveyor 31, the heavy objects in the stale garbage will be bounced by the periodically up and down fluctuating conveyor belt, and move along the slope toward the first output port 311 of the bouncing belt conveyor 31.

[0040] In the specific implementation process, Figure 1As shown, the third screening mechanism also includes: a net box 33, the net box 33 is sleeved on the bouncing belt conveyor 31, the two sides of the net box 33 are respectively connected to the two sides of the bouncing belt conveyor 31, and the net box 33 and at least part of the bouncing belt conveyor 31 enclose an anti-flying channel, so that the light objects in the stale garbage move to the second output port 312 of the bouncing belt conveyor 31. With such a structural arrangement, since a fan assembly 32 is arranged at the first output port 311 of the bouncing belt conveyor 31, the fan assembly 32 blows high-pressure air toward the bouncing belt conveyor 31, so that some light objects in the stale garbage will be blown up. Therefore, by arranging a net box on the bouncing belt conveyor 31, the blown light objects are prevented from running out from the side of the bouncing belt conveyor 31, and some light objects in the stale garbage are prevented from flying randomly, so that the stale garbage after screening can be smoothly transported to the second output port 312 of the bouncing belt conveyor 31.

[0041] In actual operation, the length of the net box 33 extends from one end of the bouncing belt conveyor 31 to the other end of the bouncing belt conveyor 31 , the starting end of the net box 33 is located at the end of the bouncing section, and the end of the net box 33 is located at the second output port 312 of the bouncing belt conveyor 31 .

[0042] In the specific implementation process, Figure 1 As shown, the third screening mechanism also includes: an anti-flying cover 34, the anti-flying cover 34 forms the output end of the stale garbage screening system, the input port of the anti-flying cover 34 is connected to the second output port 312 of the bouncing belt conveyor 31, the output port of the anti-flying cover 34 is arranged toward the direction of the stale garbage collection mechanism, and the anti-flying cover 34 is located above the stale garbage collection mechanism. With such a structural arrangement, since the second output port 312 of the bouncing belt conveyor 31 is higher than the ground 100, the anti-flying cover 34 is arranged to prevent some lightweight objects in the stale garbage from being blown away by natural wind in the process of falling to the ground 100, thereby improving the collection efficiency of the stale garbage.

[0043] In actual working process, the height of the anti-fly cover 34 extends in the vertical direction, the output port of the anti-fly cover 34 is arranged toward the ground 100 , and there is a certain distance between the output port of the anti-fly cover 34 and the ground 100 .

[0044] In the specific implementation process, Figure 1 and Figure 2 As shown, the third screening mechanism also includes: a heavy object transfer belt conveyor 35, which is arranged below the first output port 311 of the bouncing belt conveyor 31, and the conveyor belt of the heavy object transfer belt conveyor 35 is arranged corresponding to the first output port 311 of the bouncing belt conveyor 31. The heavy object transfer belt conveyor 35 is used to receive the heavy objects screened out from the bouncing belt conveyor 31 and transport the heavy objects to the next process.

[0045] In the specific implementation process, in order to further ensure that the heavy objects can smoothly fall onto the conveyor belt of the heavy object transfer belt conveyor 35, a protective cover is provided on the first output port 311 of the bouncing belt conveyor 31, the input port of the protective cover is sleeved on the first output port 311 of the bouncing belt conveyor 31, the output port of the protective cover is arranged toward the conveyor belt of the heavy object transfer belt conveyor 35, and the output port of the protective cover is located above the conveyor belt of the heavy object transfer belt conveyor 35. At least a part of the fan assembly 32 is inserted into the protective cover, the air outlet 321 of the fan assembly 32 is located in the protective cover, and the air outlet 321 of the fan assembly 32 is arranged toward the first output port 311 of the bouncing belt conveyor 31.

[0046] In actual operation, the heavy object transfer belt conveyor 35 is located between the bouncing belt conveyor 31 and the fan assembly 32, and the input end of the heavy object transfer belt conveyor 35 is respectively located below the first output port 311 of the bouncing belt conveyor 31 and the air outlet 321 of the fan assembly 32. The length of the heavy object transfer belt conveyor 35 extends in a direction away from the bouncing belt conveyor 31.

[0047] In the specific implementation process, Figure 1 As shown, the second screening mechanism 2 includes a first disc screen screening unit 21, a second disc screen screening unit 22 and a third disc screen screening unit 23 which are arranged in steps along the conveying direction of the stale garbage screening system, the input end of the first disc screen screening unit 21 is located below the output end of the first screening mechanism 1, the input end of the second disc screen screening unit 22 is located below the output end of the first disc screen screening unit 21, and the input end of the third disc screen screening unit 23 is located below the output end of the second disc screen screening unit 22. With such a structural setting, through the first disc screen screening unit 21, the second disc screen screening unit 22 and the third disc screen screening unit 23 which are arranged in steps along the conveying direction of the stale garbage screening system, the stale garbage can be transported from the first disc screen screening unit 21 to the second disc screen screening unit 22, and then to the third disc screen screening unit 23, and can be turned over twice by utilizing the height difference between the two disc screen screening units, thereby making the stale garbage looser during the transmission process, reducing accumulation and adhesion, and reducing the risk of clogging of the disc screen screening unit. In addition, the stale garbage can be better dispersed and evenly distributed during the transmission process, so that the humus soil can be screened more fully, thereby improving the screening efficiency of the second screening mechanism.

[0048] In actual working process, the mesh size of the sieve plate of the first disc screen screening unit 21, the mesh size of the sieve plate of the second disc screen screening unit 22 and the mesh size of the sieve plate of the third disc screen screening unit 23 can be the same, or can be gradually reduced. Preferably, the mesh size of the sieve plate of the first disc screen screening unit 21, the mesh size of the sieve plate of the second disc screen screening unit 22 and the mesh size of the sieve plate of the third disc screen screening unit 23 are all 20mm*20mm.

[0049] In the actual working process, the first disc screen screening unit 21, the second disc screen screening unit 22 and the third disc screen screening unit 23 are each provided with a reduction motor, so as to drive the sieve plate of the first disc screen screening unit 21, the sieve plate of the second disc screen screening unit 22 and the sieve plate of the third disc screen screening unit 23 to move through each reduction motor. The conveying speed of the first disc screen screening unit 21, the conveying speed of the second disc screen screening unit 22 and the conveying speed of the third disc screen screening unit 23 are all greater than or equal to 2m / s.

[0050] In the actual working process, the first disc screen screening unit 21, the second disc screen screening unit 22 and the third disc screen screening unit 23 are all provided with cleaning components, and each cleaning component is respectively arranged on the conveying shaft of the first disc screen screening unit 21, the second disc screen screening unit 22 and the third disc screen screening unit 23. In the conveying process, each cleaning component cleans the sieve plate on the first disc screen screening unit 21, the sieve plate of the second disc screen screening unit 22 and the sieve plate of the third disc screen screening unit 23 respectively.

[0051] In the specific implementation process, the second screening mechanism 2 also includes: a disc screen undersize collection belt conveyor 24, which is located below the first disc screen screening unit 21, the second disc screen screening unit 22 and the third disc screen screening unit 23. The sieve plates of the first disc screen screening unit 21, the second disc screen screening unit 22 and the third disc screen screening unit 23 are all arranged corresponding to the conveyor belt of the disc screen undersize collection belt conveyor 24, and the disc screen undersize collection belt conveyor 24 is used to transport the screened humus soil.

[0052] In the specific implementation process, the second screening mechanism 2 also includes: a humus transfer belt conveyor 25, which is arranged below the output port of the disc screen undersize collection belt conveyor 24, and the conveyor belt of the humus transfer belt conveyor 25 is arranged corresponding to the output port of the disc screen undersize collection belt conveyor 24, and the humus transfer belt conveyor 25 is used to transport the humus to the next process.

[0053] In actual working process, the conveyor belt at the input end of the humus soil transport belt conveyor 25 is arranged correspondingly to the output port of the disc screen undersize collection belt conveyor 24. The length of the humus soil transport belt conveyor 25 extends in a direction away from the disc screen undersize collection belt conveyor 24.

[0054] In the specific implementation process, Figure 1 As shown, the second screening mechanism 2 further includes: a garbage transfer conveyor belt machine 26, which is located between the third disc screen screening unit 23 and the bouncing belt machine 31, and the garbage transfer conveyor belt machine 26 is used to transfer the stale garbage screened by the third disc screen screening unit 23 to the bouncing belt machine 31. Specifically, the input end of the garbage transfer conveyor belt machine 26 is arranged below the output end of the third disc screen screening unit 23, and the output end of the garbage transfer conveyor belt machine 26 is arranged above the input end of the bouncing belt machine 31 (i.e., above the drop zone of the bouncing belt machine 31).

[0055] In this embodiment, if Figure 1 As shown, the first screening mechanism 1 includes: a plate conveyor 11 and a manual hand-picking belt conveyor 12. The plate conveyor 11 forms the input end of the stale garbage screening system for conveying unprocessed stale garbage; the input end of the manual hand-picking belt conveyor 12 is located below the plate conveyor 11, and the output end of the manual hand-picking belt conveyor 12 forms the output end of the first screening mechanism 1. The manual hand-picking belt conveyor 12 is used to screen out large blocks in the unprocessed stale garbage and transport the screened stale garbage to the second screening mechanism 2.

[0056] In the specific implementation process, a uniform distribution component is provided at the output end of the plate conveyor 11 to push back the stale garbage that exceeds the set thickness, so that the stale garbage can be transported to the manual hand-pickup belt conveyor 12 with a fixed thickness. At the same time, a storage hopper is provided on the plate conveyor 11 along the length direction of the plate conveyor 11 to transport the unprocessed stale garbage to the chain plate of the plate conveyor 11, so that the unprocessed stale garbage can be transported to the manual hand-pickup belt conveyor 12 through the movement of the chain plate of the plate conveyor 11.

[0057] During the specific implementation process, the first screening mechanism 1 also includes: a manual sorting platform 13, which is arranged on both sides of the manual hand-picking belt conveyor 12. Escalators are provided at one end of the manual sorting platforms 13 on both sides of the manual hand-picking belt conveyor 12 for the staff to go up and down. A large bulk chute is also provided on the manual sorting platform 13. The staff puts the selected large bulk objects into the large bulk chute and sends them to a specific place for processing such materials.

[0058] The bulk objects may be large stones with a particle size greater than 350 mm, slow-setting soil blocks, large wood and other bulk objects.

[0059] The working process of the stale garbage screening system is:

[0060] First, the stale garbage excavated from the sanitary landfill is transported to the chain plate of the plate conveyor 11 through the storage hopper on the plate conveyor 11, and the unprocessed stale garbage is transported to the manual hand-picking belt conveyor 12 through the chain plate of the plate conveyor 11. In the conveying process of the plate conveyor 11, the unprocessed stale garbage exceeding the set thickness is pushed back by the uniform distribution component at the output end of the plate conveyor 11, so that the unprocessed stale garbage is transported to the manual hand-picking belt conveyor 12 with a fixed thickness. When the unprocessed stale garbage is transported to the manual hand-picking belt conveyor 12, the staff picks out the large pieces (i.e., stale garbage with a particle size greater than 350 mm) on the manual sorting platform 13. The stale garbage after picking is transported to the first disc screen screening unit 21 through the conveyor belt of the manual hand-picking belt conveyor 12.

[0061] Secondly, when the sorted stale garbage is transported to the first disc screen screening unit 21, the humus and moisture in the stale garbage are screened for the first time through the sieve plate on the first disc screen screening unit 21, and the screened stale garbage is transported to the second disc screen screening unit 22. Since the output end of the first disc screen screening unit 21 is located above the input end of the second disc screen screening unit 22, when the stale garbage reaches the connection between the first disc screen screening unit 21 and the second disc screen screening unit 22, it will be thrown onto the second disc screen screening unit 22 through the drop, thereby causing the stale garbage to be flipped for the first time. After the stale garbage is transported to the second disc screen screening unit 22, the humus and water in the stale garbage will be screened for the second time through the screen plate on the second disc screen screening unit 22, and then the screened stale garbage will be transported to the third disc screen screening unit 23. Since the output end of the second disc screen screening unit 22 is located above the input end of the third disc screen screening unit 23, when the stale garbage reaches the connection between the second disc screen screening unit 22 and the third disc screen screening unit 23, it will be thrown onto the third disc screen screening unit 23 through the drop, so that the stale garbage is turned over for the second time. After the stale garbage is transported to the third disc screen screening unit 23, the humus and water in the stale garbage will be screened for the third time through the screen plate on the third disc screen screening unit 23, and finally the screened stale garbage will be transported to the bouncing belt conveyor 31 through the garbage transfer conveyor belt conveyor 26. The humus sieved out from the first disc screen screening unit 21, the second disc screen screening unit 22 and the third disc screen screening unit 23 will fall onto the disc screen undersize collecting belt conveyor 24, and then the disc screen undersize collecting belt conveyor 24 will transport the collected humus to the humus transfer belt conveyor 25, and finally the humus will be moved to the next process through the humus transfer belt conveyor 25.

[0062] Finally, since the output end of the garbage transfer conveyor belt 26 is located above the input end of the bouncing belt conveyor 31, the stale garbage transported to the output end of the garbage transfer conveyor belt 26 will be thrown onto the drop zone of the bouncing belt conveyor 31 (i.e., the input end of the bouncing belt conveyor 31); then, when the stale garbage falls from the output end of the second screening mechanism 2 onto the drop zone of the bouncing belt conveyor 31 (i.e., the input end of the bouncing belt conveyor 31), the heavy objects in the stale garbage will be bounced up by the periodically fluctuating conveyor belt, thereby moving along the slope toward the first output port 311 of the bouncing belt conveyor 31. The screened stale garbage moves to the second output port 312 of the bouncing belt conveyor 31 through the conveyor belt of the bouncing belt conveyor 31 and the high-pressure wind blown out by the fan assembly, and finally accumulates on the ground 100 through the anti-fly cover 34. At the same time, the heavy objects moving along the slope toward the first output port 311 of the bouncing belt conveyor 31 will fall onto the heavy object transfer belt conveyor 35 through the first output port 311 of the bouncing belt conveyor 31, and then the heavy object transfer belt conveyor 35 will move the collected heavy objects to the next process.

[0063] The utility model provides a stale garbage screening system, which comprises: a first screening mechanism 1, a second screening mechanism 2 and a third screening mechanism 3, wherein the first screening mechanism 1 is used to screen out large pieces of material in untreated stale garbage, and to transport the screened stale garbage; the second screening mechanism 2 is arranged at the output end of the first screening mechanism 1, and is used to screen out humus in the stale garbage transported by the first screening mechanism 1, and to transport the screened stale garbage; the third screening mechanism 3 is arranged at the output end of the second screening mechanism 2, and is used to screen out heavy materials in the stale garbage transported by the second screening mechanism 2, and to transport the screened stale garbage to a stale garbage collecting mechanism; wherein the second screening mechanism 2 comprises at least two disc screen screening units, and the disc screen screening units are used to screen out humus in the stale garbage; and a plurality of disc screen screening units are arranged in steps along the transport direction of the stale garbage screening system.

[0064] It can be seen that the stale garbage screening system provided by the utility model can screen the stale garbage multiple times by simply setting the first screening mechanism 1, the second screening mechanism 2 and the third screening mechanism 3, and the first screening mechanism 1, the second screening mechanism 2 and the third screening mechanism 3 are connected in sequence along the conveying direction of the stale garbage screening system, so that the stale garbage can be screened multiple times, so that the large pieces, the humus with low calorific value and the heavy objects with low calorific value in the stale garbage can be effectively separated through multiple screening, thereby improving the calorific value of the stale garbage, meeting the temperature requirements of the incinerator, realizing large-scale incineration, greatly improving the garbage treatment efficiency, and reducing the treatment cost and improving the treatment efficiency of the stale garbage. At the same time, through multiple screening, harmful or non-recyclable stale garbage can be effectively separated, which helps to reduce pollution to the environment. At the same time, for recyclable stale garbage, through effective classification and treatment, it helps to save resources and achieve recycling.

[0065] In addition, the second screening mechanism 2 includes at least two disc screen screening units, and the plurality of disc screen screening units are arranged in steps along the conveying direction of the stale garbage screening system. By arranging the plurality of disc screen screening units in steps along the conveying direction of the stale garbage screening system, the humus in the stale garbage can be screened multiple times, which can further improve the accuracy of screening humus, further reduce the content of humus in the stale garbage, and thus improve the calorific value of the stale garbage. In addition, the plurality of disc screen screening units are arranged in steps, so that the stale garbage can be turned over when it is transported from one disc screen screening unit among the plurality of disc screen screening units to another disc screen screening unit, so that the stale garbage can be loosened better during the transmission process, reducing accumulation and adhesion, and reducing the risk of clogging of the disc screen screening unit. And the stale garbage can be better dispersed and evenly distributed during the transmission process, so that the humus can be screened more fully, thereby improving the screening efficiency of the second screening mechanism. The stale garbage screening system has a simple structure and is easy to operate. It can quickly remove large pieces of stale garbage that cannot enter the furnace, some humus with low calorific value, and some heavy objects with low calorific value. It can effectively increase the calorific value of the stale garbage and effectively solve the technical problem of how to improve the treatment efficiency of stale garbage in the prior art.

[0066] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device comprising a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0067] Optionally, the specific examples in this embodiment may refer to the examples described in the above embodiments, and this embodiment will not be described in detail here.

[0068] The serial numbers of the above-mentioned embodiments of the present application are for description only and do not represent the advantages or disadvantages of the embodiments.

[0069] In the above embodiments of the present application, the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, please refer to the relevant description of other embodiments.

[0070] The above is only a preferred implementation of the present application. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present application. These improvements and modifications should also be regarded as the scope of protection of the present application.

Claims

1. A stale garbage screening system, characterized in that: The stale garbage screening system comprises: A first screening mechanism (1) is used to screen out large pieces of material from the unprocessed stale garbage and to transport the screened stale garbage; A second screening mechanism (2) is arranged at the output end of the first screening mechanism (1) to screen out the humus soil in the stale garbage delivered by the first screening mechanism (1) and to deliver the screened stale garbage; A third screening mechanism (3) is arranged at the output end of the second screening mechanism (2), and the third screening mechanism (3) is used to screen out heavy objects in the stale garbage delivered by the second screening mechanism (2), and to deliver the screened stale garbage to the stale garbage collection mechanism; The second screening mechanism (2) comprises at least two disc screen screening units, and the disc screen screening units are used to screen out the humus soil in the stale garbage; a plurality of the disc screen screening units are arranged in steps along the conveying direction of the stale garbage screening system.

2. The stale garbage screening system according to claim 1, characterized in that: The third screening mechanism (3) comprises: A bouncing belt conveyor (31), one end of the bouncing belt conveyor (31) is arranged below the output end of the second screening mechanism (2), the other end of the bouncing belt conveyor (31) is close to the output end of the stale garbage screening system, and a first preset angle is formed between the extension direction from one end of the bouncing belt conveyor (31) to the other end of the bouncing belt conveyor (31) and the conveying direction of the stale garbage screening system; the bouncing belt conveyor (31) is used to screen out heavy objects in the stale garbage after the second screening, and to convey the screened stale garbage to the output end of the stale garbage screening system; A fan assembly (32) is arranged at a port of the bouncing belt conveyor (31) close to the output end of the second screening mechanism (2), and an air outlet (321) of the fan assembly (32) is arranged toward the bouncing belt conveyor (31), so that high-pressure wind coming out of the air outlet (321) of the fan assembly (32) drives the light objects in the stale garbage to move toward the output end of the stale garbage screening system; The port at one end of the bouncing belt conveyor (31) is the first output port (311) of the bouncing belt conveyor (31), and the port at the other end of the bouncing belt conveyor (31) is the second output port (312) of the bouncing belt conveyor (31).

3. The stale garbage screening system according to claim 2, characterized in that: The bouncing belt conveyor (31) has a bouncing section, and a plurality of bouncing rollers (313) are arranged at intervals in the bouncing section along the extension direction of the bouncing belt conveyor (31). The plurality of bouncing rollers (313) are all located below the conveyor belt of the bouncing belt conveyor (31). The conveyor belt of the bouncing belt conveyor (31) rotates to the bouncing section to form periodic up and down fluctuations through the plurality of bouncing rollers (313), so as to bounce heavy objects in the stale garbage; The bounced heavy object moves in the direction of the first output port (311) of the bouncing belt conveyor (31).

4. The stale garbage screening system according to claim 2, characterized in that: The third screening mechanism also includes: a net box (33), the net box (33) is mounted on the bouncing belt conveyor (31), the two sides of the net box (33) are respectively connected to the two sides of the bouncing belt conveyor (31), and the net box (33) and at least part of the bouncing belt conveyor (31) form an anti-flying channel to allow the light objects in the stale garbage to move to the second output port (312) of the bouncing belt conveyor (31).

5. The stale garbage screening system according to claim 2, characterized in that: The third screening mechanism further comprises: an anti-flying cover (34), the anti-flying cover (34) forms the output end of the stale garbage screening system, the input port of the anti-flying cover (34) is connected to the second output port (312) of the bouncing belt conveyor (31), the output port of the anti-flying cover (34) is arranged in the direction of the stale garbage collecting mechanism, and the anti-flying cover (34) is located above the stale garbage collecting mechanism.

6. The stale garbage screening system according to claim 3, characterized in that: The third screening mechanism also includes: a heavy object transfer belt conveyor (35), wherein the heavy object transfer belt conveyor (35) is arranged below the first output port (311) of the bouncing belt conveyor (31), and the conveyor belt of the heavy object transfer belt conveyor (35) is arranged corresponding to the first output port (311) of the bouncing belt conveyor (31), and the heavy object transfer belt conveyor (35) is used to receive the heavy objects screened from the bouncing belt conveyor (31) and transport the heavy objects to the next process.

7. The stale garbage screening system according to claim 1, characterized in that: The second screening mechanism (2) comprises a first disc screen screening unit (21), a second disc screen screening unit (22) and a third disc screen screening unit (23) which are arranged in a step-like manner along the conveying direction of the stale garbage screening system, wherein the input end of the first disc screen screening unit (21) is located below the output end of the first screening mechanism (1), the input end of the second disc screen screening unit (22) is located below the output end of the first disc screen screening unit (21), and the input end of the third disc screen screening unit (23) is located below the output end of the second disc screen screening unit (22).

8. The stale garbage screening system according to claim 7, characterized in that: The second screening mechanism (2) further comprises: a disc screen undersize collecting belt conveyor (24), wherein the disc screen undersize collecting belt conveyor (24) is located below the first disc screen screening unit (21), the second disc screen screening unit (22) and the third disc screen screening unit (23), wherein the sieve plate of the first disc screen screening unit (21), the sieve plate of the second disc screen screening unit (22) and the sieve plate of the third disc screen screening unit (23) are all arranged corresponding to the conveyor belt of the disc screen undersize collecting belt conveyor (24), and the disc screen undersize collecting belt conveyor (24) is used to transport the screened humus soil.

9. The stale garbage screening system according to claim 8, characterized in that: The second screening mechanism (2) further comprises: a humus soil transfer belt conveyor (25), the humus soil transfer belt conveyor (25) being arranged below the output port of the disc screen undersize collection belt conveyor (24), the conveyor belt of the humus soil transfer belt conveyor (25) being arranged corresponding to the output port of the disc screen undersize collection belt conveyor (24), and the humus soil transfer belt conveyor (25) being used to transport the humus soil to the next process.

10. The stale garbage screening system according to any one of claims 1 to 9, characterized in that: The first screening mechanism (1) comprises: A plate conveyor (11), the plate conveyor (11) forming an input end of the stale garbage screening system, and used for conveying the unprocessed stale garbage; A manual hand-picking belt conveyor (12), wherein the input end of the manual hand-picking belt conveyor (12) is located below the plate conveyor (11), and the output end of the manual hand-picking belt conveyor (12) forms the output end of the first screening mechanism (1). The manual hand-picking belt conveyor (12) is used to screen out large pieces of material from the unprocessed stale garbage and transport the screened stale garbage to the second screening mechanism (2).

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