Sludge and household garbage blending combustion feeding and conveying system

Abstract

The utility model provides a sludge and household garbage blending combustion feeding and conveying system. The system comprises a sludge temporary storage bin; one end of the closed scraper conveyor is connected with a bottom outlet of the sludge temporary storage bin, and the other end of the closed scraper conveyor is connected to an inlet of the bucket elevator; the multi-stage granulation device comprises a first-stage granulation temporary storage bin, a first-stage distributor, a plurality of second-stage granulation temporary storage bins and a plurality of second-stage distributors; an inlet of the primary granulation temporary storage bin is connected to an outlet of the bucket elevator; an outlet of the first-stage granulation temporary storage bin is connected to all the second-stage granulation temporary storage bins through a first-stage distributor; the number of the second-stage granulation temporary storage bins is consistent with that of the second-stage distributors; an outlet of each second-stage granulation temporary storage bin is connected with a second-stage distributor; and the outlets of all the secondary distributors are connected with an incineration hearth. Sludge is directly poured into the sludge temporary storage bin through the discharging trolley, the sludge firstly falls into the sludge temporary storage bin through the feeding grid by means of the gravity borne by the sludge, and then large sludge blocks are subjected to crushing pretreatment through the crushing device; the pretreatment process of the sludge is simplified, and intermediate links are reduced, so that the sludge treatment efficiency is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of sludge and domestic garbage mixed combustion treatment and conveying equipment, and more specifically, particularly relates to a sludge and domestic garbage mixed combustion feeding and conveying system. Background Art

[0002] Sludge incineration technology mainly includes separate incineration, cement kiln co-treatment, coupled garbage co-incineration, etc. Among them, separate sludge incineration has the advantages of better control of incineration process parameters, pre-treatment according to sludge characteristics, avoiding mutual influence of mixed incineration with other wastes, making the incineration process more stable and controllable, reducing the generation of residues and secondary pollutants, and the single property of the residue is convenient for comprehensive utilization and treatment. However, separate sludge incineration requires the construction of a separate incineration system, with high initial investment and operating costs. The processing capacity and scope are limited to sludge, and the sludge has a low calorific value and requires auxiliary fuel, resulting in high energy consumption and poor economy. At the same time, it occupies a large area and has a large impact on the environment. If pollution control measures are not appropriate, it will still have a certain impact on the environment; sludge cement kiln co-treatment incineration has the advantage of being able to use the high temperature environment of the cement kiln to thoroughly incinerate the sludge, and the inorganic matter in the sludge can be used as cement raw materials to improve comprehensive utilization. There is no need to build another incineration facility, and the investment and operating costs are low, and no incineration residue is generated. The advantage of using sludge as a partial substitute for fuel is that cement kilns have limited sludge treatment capacity and cannot be treated on a large scale. Harmful substances such as heavy metals in sludge may affect the quality of cement products. The physical and chemical properties of sludge require high pretreatment, and the transportation distance is high. The cost is high, and the coordinated disposal operation requires high requirements and strict control of the feed amount and time. The coordinated incineration of sludge and domestic waste can treat a large amount of sludge on a large scale, and use existing waste incineration facilities to avoid new investment. The high calorific value of domestic waste can make up for the defect of insufficient calorific value of sludge and improve the incineration efficiency. No special pretreatment is required for easy operation, and nearby treatment reduces transportation costs. Existing pollution control measures are conducive to controlling secondary pollution and realizing comprehensive resource utilization. Treating domestic waste while absorbing sludge is an ideal treatment method that is more economical and environmentally friendly, but the following problems will be encountered during the coordinated incineration of domestic waste:

[0003] The existing feeding system of municipal solid waste incineration plants is not suitable for sludge feeding: In the early stage of construction, municipal solid waste incineration plants did not consider the coordinated incineration of sludge and municipal solid waste. The designed feeding system is only suitable for domestic waste feeding. For example, the feeding process of municipal solid waste incineration plants is to first pour the domestic waste into the garbage pool for natural fermentation, filter out the leachate, and then use a six-petal garbage grab to grab it and put it into the incinerator for incineration. The sludge has strong fluidity and is difficult to grab with the garbage grab. In addition, the sludge is easily accumulated at the bottom of the garbage pool, causing blockage of the bottom drainage system.

[0004] The transformation of the existing feeding system is difficult and costly: the existing feeding system is only suitable for domestic waste feeding, and the most reasonable layout design has been formed during the long-term operation. If it is transformed, it will not only affect the normal operation of domestic waste incineration treatment, but also require more costs and face more risks.

[0005] Sludge is easy to clump during transportation: Sludge is easy to clump when it accumulates at the bottom of the transfer vehicle during transportation, which will cause blockage in the subsequent transportation process, seriously affecting the efficiency of incineration in the furnace and increasing the operation and maintenance costs.

[0006] Sludge will emit odor during transportation: Sludge itself carries odor. If no measures are taken during transportation, the odor will overflow and affect the working environment and endanger human health.

[0007] Sludge cannot be directly put into the furnace for incineration: Since sludge has a high water content, low calorific value, and is easy to accumulate into mud blocks, if it is directly put into the furnace for incineration, it will cause incomplete local combustion in the furnace and affect the combustion conditions in the furnace. Utility Model Content

[0008] The utility model aims to provide a feeding and conveying system for the co-incineration of sludge and domestic waste, so as to solve the technical problems encountered in the prior art in the co-incineration of sludge and domestic waste, such as the unsuitability of the feeding system, the difficulty of transformation, the sludge agglomeration and odor overflow, and the inability to directly put the sludge into the furnace for incineration.

[0009] In order to solve the above technical problems, the specific technical scheme of a sludge and domestic garbage mixed combustion feeding and conveying system of the utility model is as follows:

[0010] A sludge and domestic garbage mixed combustion feeding and conveying system, comprising:

[0011] Sludge buffer tank;

[0012] A closed scraper conveyor, one end of which is connected to the bottom outlet of the sludge buffer bin, and the other end of which is connected to the inlet of the bucket elevator;

[0013] A multi-stage granulation device, comprising a primary granulation buffer bin, a primary material distributor, a plurality of secondary granulation buffer bins and a plurality of the secondary material distributors; the inlet of the primary granulation buffer bin is connected to the outlet of the bucket elevator; the outlet of the primary granulation buffer bin is respectively connected to all the secondary granulation buffer bins through the primary material distributor;

[0014] The number of the secondary granulation buffer bins and the secondary distributors is the same; the outlet of each secondary granulation buffer bin is connected to a secondary distributor; the outlets of all the secondary distributors are connected to the inlet of a granulation unit, and the outlet of each granulation unit is connected to an incineration furnace.

[0015] Optionally, the sludge buffer bin is a square funnel structure, a feed grid is provided at the square bell mouth of the funnel structure, a primary crushing roller assembly is provided in the middle of the funnel structure, a funnel mouth is provided at the bottom of the funnel structure, and a sludge crushing device is provided at the funnel mouth.

[0016] Optionally, the primary crushing roller assembly comprises a plurality of primary crushing rollers arranged side by side; a plurality of crushing blades are arranged alternately on each of the primary crushing rollers.

[0017] Optionally, the sludge crushing device includes a driving source and two rotating shafts, and the driving source drives the two rotating shafts to rotate relative to each other; each of the rotating shafts is provided with mutually staggered blades.

[0018] Optionally, a flexible connector is provided between the inlet of the closed scraper conveyor and the outlet of the sludge buffer bin, and the closed scraper conveyor is arranged at an upward angle of 30° to 60°.

[0019] Optionally, the primary granulation buffer bin and the secondary granulation buffer bin both include a cylindrical structure and a funnel structure; the upper end of the cylindrical structure is a feed inlet, and the lower end of the cylindrical structure is connected to the large end of the funnel structure.

[0020] Optionally, a large extrusion spiral component is provided at the small end of the funnel structure of the primary granulation buffer bin.

[0021] Optionally, the first-stage distributor is in an inverted Y-pipe structure, and an electric valve is provided on each side of the discharge pipe of the first-stage distributor.

[0022] Optionally, the secondary distributor is an inverted Y-pipe structure, and each side discharge pipe of the secondary distributor is provided with a feed screw assembly, and the discharge pipe is also provided with a feed valve, and the feed valve is located on the upper side of the feed screw assembly.

[0023] Optionally, each group of the granulators is connected to an incineration furnace via a group of tube chain conveyors.

[0024] The beneficial effects of the sludge and domestic waste mixed combustion feeding and conveying system provided by the present application are:

[0025] The utility model allows sludge to be directly poured into the sludge buffer bin by a discharge truck. The sludge first falls into the sludge buffer bin through a feed grid by its own gravity, and then passes through a crushing device to crush large lumps of mud for pretreatment. The sludge pretreatment process is simplified, the intermediate links are reduced, and the efficiency of sludge treatment is improved.

[0026] In addition, the utility model conveys the crushed sludge to the bucket elevator through the closed scraper conveyor, and the bucket elevator conveys the sludge to the primary granulation buffer bin, thereby ensuring the continuity and high efficiency of the sludge in the treatment process.

[0027] In addition, the utility model allows the sludge in the primary granulation buffer bin to enter the secondary granulation buffer bin through the primary distributor, and evenly discharges the sludge to the secondary granulation buffer bin by adjusting the large extrusion screw in the primary granulation buffer bin and the electric valve on the discharge side pipeline of the primary distributor; subsequently, the sludge in the secondary granulation buffer bin is discharged to each group of granulators through the secondary distributor, and evenly feeds the sludge by adjusting the feed valve and the feed screw to form granules; thus, even discharging and feeding of the sludge are achieved, thereby improving the evenness and quality of sludge granulation.

[0028] In addition, the utility model granulates the sludge and transports it to the incinerator for mixed combustion, so that the sludge can be fully burned, with less impact on the original incineration conditions and lower energy consumption; therefore, it not only solves the sludge treatment problem, but also realizes the resource utilization of sludge, improves resource utilization efficiency, and reduces environmental pollution. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a schematic diagram of a feeding and conveying system for the mixed combustion of sludge and domestic garbage of the utility model;

[0030] Figure 2 It is a schematic diagram of a sludge buffer bin of a sludge and domestic garbage mixed combustion feeding and conveying system of the utility model;

[0031] Figure 3 It is a schematic diagram of a primary granulation buffer bin of a sludge and domestic garbage mixed combustion feeding and conveying system of the utility model;

[0032] Figure 4 It is a schematic diagram of a primary distributor of a feeding and conveying system for the mixed combustion of sludge and domestic garbage of the utility model;

[0033] Figure 5 The utility model is a schematic diagram of a secondary distributor of a sludge and domestic garbage mixed combustion feeding and conveying system.

[0034] Description of the markings in the figure:

[0035] 1. Sludge buffer bin; 11. Square bell mouth; 12. Feed grid; 13. Primary crushing roller assembly; 131. Primary crushing roller; 14. Funnel mouth; 15. Sludge crushing device; 2. Closed scraper conveyor; 3. Bucket elevator; 4. Primary granulation buffer bin; 41. Cylinder structure; 42. Funnel structure; 421. Extrusion large spiral assembly; 421a. Driving source; 421b. Gear structure; 421c. Spiral blade; 5. Primary distributor; 51. Discharge pipe; 52. Electric valve; 6. Secondary granulation buffer bin; 7. Secondary distributor; 71. Discharge pipe; 72. Feed spiral assembly; 721. Motor; 73. Feed valve; 8. Granulating unit; 81. Pipe chain conveyor; 9. Incineration furnace. DETAILED DESCRIPTION

[0036] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0037] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0038] It should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0039] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0040] like Figures 1 to 5 As shown, a sludge and domestic waste mixed combustion feeding and conveying system provided in an embodiment of the present application comprises:

[0041] Sludge buffer tank 1;

[0042] A closed scraper conveyor 2, one end of which is connected to the bottom outlet of the sludge buffer bin 1, and the other end of which is connected to the inlet of the bucket elevator 3;

[0043] A multi-stage granulation device, the multi-stage granulation device comprises a primary granulation buffer bin 4, a primary material distributor 5, a plurality of secondary granulation buffer bins 6 and a plurality of secondary material distributors 7; the inlet of the primary granulation buffer bin 4 is connected to the outlet of the bucket elevator 3; the outlet of the primary granulation buffer bin 4 is respectively connected to all the secondary granulation buffer bins 6 through the primary material distributor 5;

[0044] The number of secondary granulation buffer bins 6 and secondary distributors 7 is the same; the outlet of each secondary granulation buffer bin 6 is connected to a secondary distributor 7; the outlets of all secondary distributors 7 are connected to the inlet of a granulation unit 8, and the outlet of each granulation unit 8 is connected to an incineration furnace 9.

[0045] The utility model provides a sludge and domestic waste mixed combustion feeding and conveying system. Compared with the prior art, the utility model realizes temporary storage and buffering of sludge through the provision of a sludge buffer bin, which provides convenience for subsequent treatment. The application of a closed scraper conveyor ensures the closedness of the sludge during the transportation process, effectively prevents the overflow of odor, and improves the working environment. The design of the multi-stage granulation device, including a first-level granulation buffer bin 4, a first-level distributor 5, a plurality of second-level granulation buffer bins 6 and a plurality of second-level distributors 7, realizes uniform distribution and granulation of the sludge, and improves the combustion efficiency of the sludge. Finally, the granulated sludge is sent to the incineration furnace for incineration through the granulation unit, thereby realizing efficient utilization of the sludge.

[0046] To sum up, the utility model solves many technical problems in the coordinated incineration of sludge and domestic waste through technical solutions such as sludge buffer bin, closed scraper conveyor, multi-stage granulation device, granulation unit and incineration furnace, and achieves the technical effects of improving incineration efficiency, reducing operating costs, improving working environment and enhancing environmental protection performance.

[0047] In another embodiment of the present application, Figure 2As shown, the sludge buffer bin 1 is a funnel structure, a feed grid 12 is provided at the square bell mouth 11 of the funnel structure, a primary crushing roller assembly 13 is provided in the middle of the funnel structure, a funnel mouth 14 is provided at the bottom of the funnel structure, and a sludge crushing device 15 is provided at the funnel mouth 14. Specifically, the feed grid provided at the square bell mouth 11 effectively prevents larger debris from entering the buffer bin, ensuring the smooth progress of the subsequent treatment process. The primary crushing roller assembly 13 can perform preliminary crushing treatment at the initial stage of the sludge entering the buffer bin, greatly improving the efficiency of subsequent treatment. A funnel mouth 14 is provided at the bottom of the funnel structure, where a sludge crushing device 15 is provided. This device further crushes the sludge to ensure that the sludge does not clump and block the subsequent transportation channel.

[0048] In another embodiment of the present application, Figure 2 As shown, the primary crushing roller assembly 13 includes a plurality of primary crushing rollers 131 arranged side by side; a plurality of crushing blades 132 are staggeredly arranged on each primary crushing roller 131. The design of the plurality of primary crushing rollers 131 can increase the contact area with the sludge and improve the crushing efficiency. A plurality of crushing blades 132 are staggeredly arranged on each primary crushing roller 131. This staggered arrangement enables the crushing blades 132 to cut and crush the sludge more effectively when rotating, further improving the crushing effect. At the same time, by adjusting the rotation speed and spacing of the primary crushing rollers 131, adaptive treatment of different sludges can also be achieved to meet different treatment requirements.

[0049] Furthermore, the transmission shaft of the primary crushing roller 131 is driven by a motor, and the crushing blade 132 is made of anti-corrosion and wear-resistant material; the crushing blade 132 made of anti-corrosion and wear-resistant material can not only effectively resist the corrosive substances that may exist in the sludge, thereby extending the service life of the crushing blade 132, but also can maintain a sharp cutting edge during long-term friction and crushing, thereby ensuring the stability and efficiency of the crushing effect.

[0050] In another embodiment of the present application, Figures 4 to 5As shown, the sludge crushing device 15 includes a drive and two rotating shafts, and the drive source drives the two rotating shafts to rotate relative to each other; each rotating shaft is provided with staggered blades. The device is mainly composed of a drive and two rotating shafts, and the two rotating shafts can rotate relative to each other through the power of the drive source. This relative rotation design enables the device to achieve a more thorough and uniform crushing effect when crushing the sludge. More noteworthy is that each rotating shaft is provided with staggered blades. This blade layout not only increases the cutting area and improves the crushing efficiency, but also the staggered blades can form shear force during the rotation process, so as to crush the sludge more finely. This design enables the sludge crushing device 15 to maintain efficient crushing ability when processing high-viscosity and high-water content sludge. Similar to the aforementioned crushing blade 132, the sludge crushing device 15 is made of anti-corrosion and wear-resistant materials, which can also effectively resist the corrosive substances that may exist in the sludge and extend the service life of the sludge crushing device 15.

[0051] In another embodiment of the present application, Figure 1 As shown, after the sludge is pretreated, the sludge will be transported to the entrance of the bucket elevator 3 by the closed scraper conveyor 2; the closed design of the closed scraper conveyor 2 ensures the closure of the sludge during transportation, effectively prevents the overflow of odor, and also avoids the scattering and splashing of the sludge during transportation. In addition, a soft connector is provided between the entrance of the closed scraper conveyor 2 and the outlet of the sludge crushing device 15. The soft connector has good flexibility and shock absorption, can effectively absorb and buffer vibration, and prevent the connection from loosening or breaking due to vibration. At the same time, the soft connector can also adapt to a certain degree of displacement changes, ensuring that the sludge can be stably transported from the sludge crushing device 15 to the closed scraper conveyor 2.

[0052] Furthermore, in the present embodiment, the main body of the closed scraper conveyor 2 is arranged at an angle of 30° to 60° upward; the appropriate inclination angle helps to reduce the resistance of the material during the conveying process. When the conveyor belt is tilted, the gravity component of the sludge will generate a component force along the conveying direction, and this component force helps to push the sludge forward. In contrast, if the conveyor belt is too horizontal, the sludge is more susceptible to friction resistance, resulting in reduced conveying efficiency. Therefore, by adjusting the inclination angle of the conveyor, the resistance during material transportation can be reduced and the conveying efficiency can be improved. In addition, the appropriate inclination angle can also help to reduce energy consumption. Due to the reduction in resistance during transportation, the driving force required for the conveyor will also be reduced accordingly. This means that the drive motor can run at a lower power state, thereby reducing energy consumption.

[0053] Furthermore, in this embodiment, the outer shell of the closed scraper conveyor 2 is made of wear-resistant and anti-corrosion materials; the wear-resistant and anti-corrosion materials can resist the wear of corrosive substances and particulates that may exist in the sludge, thereby extending the service life of the closed scraper conveyor 2. In addition, the wear-resistant and anti-corrosion materials can also reduce the adhesion of sludge during the conveying process, keeping the closed scraper conveyor 2 clean and running efficiently.

[0054] In another embodiment of the present application, Figure 4 and 5 As shown, the design of the primary granulation buffer bin 4 and the secondary granulation buffer bin 6 has been further optimized. Both buffer bins adopt a combination design of a cylindrical structure 41 and a funnel structure 42, which not only improves the efficiency of sludge treatment, but also enhances the stability and reliability of the equipment. Specifically, the cylindrical structure 41 is the main part of the buffer bin, and its upper end is designed as a feed port for receiving sludge from upstream equipment. The cylindrical structure has a large capacity and can temporarily store a certain amount of sludge, which plays a role in buffering and balancing the material flow. At the same time, the shape of the cylindrical structure 41 is also conducive to the uniform distribution and flow of sludge therein. The lower end of the cylindrical structure 41 is connected to the large end of the funnel structure 42. The design of the funnel structure 42 allows the sludge to gradually converge and be discharged smoothly. The inclined surface and the gradually shrinking outlet of the funnel structure 42 effectively guide the sludge to flow to the downstream equipment, avoiding the retention and blockage of materials in the buffer bin.

[0055] In another embodiment of the present application, Figure 3 As shown, the small end of the funnel structure 42 of the primary granulation buffer bin 4 is provided with a large extrusion spiral assembly 421. The main function of the large extrusion spiral assembly 421 is to further compress and granulate the sludge. When the sludge flows from the cylindrical structure 41 into the funnel structure 42, the density and pressure of the sludge will gradually increase due to the gradual contraction of the funnel structure. On this basis, the large extrusion spiral assembly 421 strongly squeezes and pushes the sludge through the rotation of its spiral blades 421c.

[0056] In another embodiment of the present application, the extrusion large spiral component 421 includes a driving source 421a, a gear structure 421b and a spiral blade 421c; the driving source 421a is transmission-connected to the gear structure 421b, so that the gear structure drives the spiral blade 421c.

[0057] In another embodiment of the present application, Figure 4As shown, in the primary distributor 5, each side of the discharge pipe 51 is equipped with an electric valve 52. The precise control of the electric valve 52 allows the material to enter different discharge pipes at a predetermined ratio and speed, thereby meeting the material requirements of different processing processes. This design not only improves the accuracy of material distribution, but also makes the entire processing process more flexible and controllable.

[0058] like Figure 5 As shown, in the secondary distributor 7, the design is more sophisticated. The discharge pipe 71 on each side is not only provided with a feed screw assembly 72, but also a feed valve 73 is provided above the discharge pipe 71. The spiral blades of the feed screw assembly 72 are driven by the motor 721 to rotate, so that the material can be smoothly and continuously transported to the next link, and the feed valve 73 can further adjust and control the material flow when necessary. This design not only ensures the continuity and stability of material transportation, but also enables the secondary distributor 7 to better adapt to different material characteristics and processing requirements.

[0059] In another embodiment of the present application, Figure 1 As shown, each granulator group 8 is directly connected to an incineration furnace 9 through a group of pipe chain conveyors 81. This design enables the granulated sludge to be efficiently and directly transported to the incineration furnace 9 for incineration treatment, thereby improving the efficiency of the entire treatment process. As a closed conveying equipment, the pipe chain conveyor 81 has the advantages of large conveying capacity, long conveying distance, and stable conveying.

[0060] It is understood that the present invention is described by some embodiments, and those skilled in the art are aware that various changes or equivalent substitutions may be made to these features and embodiments without departing from the spirit and scope of the present invention. In addition, under the teachings of the present invention, these features and embodiments may be modified to adapt to specific circumstances and materials without departing from the spirit and scope of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of this application are within the scope of protection of the present invention.

Claims

1. A feeding and conveying system for the mixed combustion of sludge and domestic waste, characterized in that: include: Sludge buffer tank; A closed scraper conveyor, one end of which is connected to the bottom outlet of the sludge buffer bin, and the other end of which is connected to the inlet of the bucket elevator; A multi-stage granulation device, comprising a primary granulation buffer bin, a primary material distributor, a plurality of secondary granulation buffer bins and a plurality of secondary material distributors; the inlet of the primary granulation buffer bin is connected to the outlet of the bucket elevator; the outlet of the primary granulation buffer bin is respectively connected to all the secondary granulation buffer bins through the primary material distributor; The number of the secondary granulation buffer bins and the secondary material distributors is the same; the outlet of each secondary granulation buffer bin is connected to one secondary material distributor; The outlets of all the secondary distributors are connected to the inlet of a granulator unit, and the outlet of each granulator unit is connected to an incineration furnace.

2. A sludge and domestic waste mixed combustion feeding and conveying system according to claim 1, characterized in that: The sludge buffer bin is a funnel structure, a feed grid is arranged at the square bell mouth of the funnel structure, a primary crushing roller assembly is arranged in the middle of the funnel structure, a funnel mouth is arranged at the bottom of the funnel structure, and a sludge crushing device is arranged at the funnel mouth.

3. A sludge and domestic waste mixed combustion feeding and conveying system according to claim 2, characterized in that: The primary crushing roller assembly comprises a plurality of primary crushing rollers arranged side by side; a plurality of crushing blades are arranged in an alternating manner on each of the primary crushing rollers.

4. A sludge and domestic waste mixed combustion feeding and conveying system according to claim 2, characterized in that: The sludge crushing device comprises a driving source and two rotating shafts, wherein the driving source drives the two rotating shafts to rotate relative to each other; each rotating shaft is provided with mutually staggered blades.

5. A sludge and domestic waste mixed combustion feeding and conveying system according to claim 2, characterized in that: A flexible connector is provided between the inlet of the closed scraper conveyor and the outlet of the sludge buffer bin, and the closed scraper conveyor is arranged at an upward oblique angle of 30° to 60°.

6. The sludge and domestic waste mixed combustion feeding and conveying system according to claim 1 is characterized in that: The primary granulation buffer bin and the secondary granulation buffer bin both include a cylindrical structure and a funnel structure; the upper end of the cylindrical structure is a feed inlet, and the lower end of the cylindrical structure is connected to the large end of the funnel structure.

7. The sludge and domestic waste mixed combustion feeding and conveying system according to claim 2 is characterized in that: A large extrusion spiral component is arranged at the small end of the funnel structure of the primary granulation buffer bin.

8. The sludge and domestic waste mixed combustion feeding and conveying system according to claim 1 is characterized in that: The first-stage distributor is in an inverted Y-pipe structure, and each side discharge pipe of the first-stage distributor is provided with an electric valve.

9. The sludge and domestic waste mixed combustion feeding and conveying system according to claim 1 is characterized in that: The secondary distributor is in an inverted Y-pipe structure, and each side of the discharge pipe of the secondary distributor is provided with a feed screw assembly. The discharge pipe is also provided with a feed valve, and the feed valve is located on the upper side of the feed screw assembly.

10. The sludge and domestic waste mixed combustion feeding and conveying system according to claim 1, characterized in that: Each group of the granulators is connected to an incineration furnace through a group of tube chain conveyors.

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