Horizontal sludge drying and incineration integrated equipment

Abstract

The invention discloses horizontal sludge drying and incineration integrated equipment. The horizontal sludge drying and incineration integrated equipment comprises a double-kettle rotary kiln, a combustion assembly, a feeding assembly and a slag discharging assembly. The combustion assembly and the feeding assembly are installed at the two ends of the rotary kiln respectively, and the slag discharging assembly is located on the outer side of a kiln body and is in power connection with all the parts through the driving assembly. The double-kettle rotary kiln is composed of an outer sleeve and an inner sleeve which are concentrically connected, and the inner sleeve is rotationally connected with the feeding assembly. The rotary kiln internally comprises an outer spiral blade, a variable-pitch spiral blade, a J-shaped lifting plate and a scattering and crushing mechanism. The outer spiral blades and the variable-pitch spiral blades are arranged in opposite directions, and the screw pitches are transited from large to small, so that the drying and incineration efficiency of the sludge in different stages is effectively improved. The J-shaped lifting plates are evenly distributed in the inner sleeve, the contact area of sludge and flame is increased, and the breaking and drying efficiency of the sludge is improved through the scattering and breaking mechanism. According to the design, the energy utilization rate, the treatment efficiency and the compactness of equipment are improved, and remarkable application value and economic benefits are achieved.

Description

Technical Field

[0001] The invention relates to the technical field of sludge drying and incineration, in particular to horizontal sludge drying and incineration integrated equipment. Background Art

[0002] The sludge incineration process has strict requirements on parameters such as sludge moisture content, incineration temperature, residence time and air volume. Generally speaking, when the moisture content of municipal sludge drops to between 35% and 45%, the organic matter inside the sludge can be consumed and self-sustaining combustion can be achieved; and the incineration temperature needs to be controlled at 850-1200℃, which can effectively decompose the toxic and harmful organic matter and gas in the sludge, and will not produce more nitrogen oxides due to excessive temperature; the particle size of the sludge has a significant impact on the appropriate residence time for sludge combustion. The larger the sludge particles, the longer the required residence time; finally, the air volume is an important factor in whether the sludge is fully burned.

[0003] At present, the most widely used sludge drying incinerators are mainly fluidized beds and horizontal rotary kilns. The former includes boiling fluidized beds and circulating fluidized beds. Their common characteristics are that the gas and solid phase transmission conditions are very superior; the gas phase turbulence is sufficient, the solid phase particles are small, and the heating is uniform. It has become the mainstream furnace type for sludge incineration in urban sewage plants. However, the air flow velocity in the fluidized bed is relatively high. In order to maintain the uniformity of the particle size of the particles in the bed, it is not advisable to increase the incineration temperature too high (generally around 900°C). Therefore, for industrial source sewage plant sludge (or industrial and urban sewage mixed treatment plant sludge) with specific heat-resistant organic matter decomposition requirements, there will be some difficulties in meeting its temperature, gas phase and solid phase residence time requirements. In addition, the fluidized bed incinerator also needs to install corresponding auxiliary equipment, which consumes a lot of energy and has a high application cost. Ordinary horizontal sludge drying and incineration equipment actually occupies a large area, and has high requirements for the sealing of the connections of each part of the equipment. Its internal structure and other parameters play a critical role in the sludge drying and incineration energy utilization rate. Summary of the invention

[0004] In view of the above-mentioned shortcomings existing in the prior art, the purpose of the present invention is to design a horizontal sludge drying and incineration integrated equipment based on parameters such as sludge moisture content, incineration temperature, residence time and air volume, which can not only solve the problems of large equipment footprint and high requirements for equipment connection sealing, but also reduce the energy consumption of the equipment to the greatest extent.

[0005] The technical solution adopted by the present invention to achieve the above-mentioned purpose is: a horizontal sludge drying and incineration integrated equipment, including a matching combination of a double-kettle rotary kiln, a combustion component, a feeding component, and a slag discharge component. The combustion component and the feeding component are respectively assembled at the two ends of the double-kettle rotary kiln, and the slag discharge component is assembled below the double-kettle rotary kiln.

[0006] It also includes a driving assembly, which is dynamically connected to the double-kettle rotary kiln, the feeding assembly, and the slag discharging assembly.

[0007] The double-kettle rotary kiln comprises an outer sleeve and an inner sleeve which are concentrically fixed. The outer sleeve is matched with a combustion component and a slag discharge component, and the inner sleeve is rotationally connected with a feeding component.

[0008] The double-kettle rotary kiln also includes outer spiral blades, variable-pitch spiral blades, J-shaped lifting plates, and a breaking and crushing mechanism. The outer spiral blades are fixedly connected to the inner wall of the outer sleeve, and the variable-pitch spiral blades are fixedly connected to the inner wall of the inner sleeve. The spiral directions of the outer spiral blades and the variable-pitch spiral blades are arranged in opposite directions. The spacing of the variable-pitch spiral blades close to the side of the feeding component is greater than the spacing of the variable-pitch spiral blades close to the side of the combustion component. The J-shaped lifting plates are fixedly connected to the inner sleeve and distributed in a circular array. The breaking and crushing mechanism is fixedly connected to the inner sleeve and arranged close to one side of the feeding component.

[0009] In some of the implementations, in order to ensure that the outer sleeve and the inner sleeve in the double-kettle rotary kiln can be stably fixed together and realize the design requirement of stable operation around its own axis, and to ensure that the outer sleeve, the inner sleeve and the components installed therein can maintain synchronous operation, the following technical solutions are provided.

[0010] A sealing plate is fixedly connected to one end of the outer sleeve close to the feeding assembly, and a connecting bracket and a connecting plate are respectively fixedly connected to both ends of the inner sleeve. The connecting plate is fixedly connected to the sealing plate, and the connecting bracket is fixedly connected to the inner wall of the outer sleeve.

[0011] The outer walls at both ends of the outer sleeve are fixedly connected with guide rings, and the bottom of the guide ring is equipped with two groups of supporting wheels that are symmetrically arranged, and the supporting wheels and the guide rings are matched and combined in a relatively rolling posture.

[0012] In some of the implementations, in order to ensure that the outer sleeve can be matched with the combustion assembly, to ensure that the combustion assembly can fully burn the dried and broken up sludge, and to provide heat for the sludge continuously input into the inner sleeve, the following technical solutions are provided.

[0013] The combustion assembly includes a combustion chamber and a burner. The outer sleeve is connected to the combustion chamber, and an adjustable fish scale is installed at the gap between the outer sleeve and the combustion chamber. The burner is connected to the axis of the combustion chamber and is arranged relative to the inner sleeve. An explosion-proof opening is opened on the top of the combustion chamber.

[0014] In some of the implementations, in order to ensure that the feeding assembly can be matched with the inner sleeve and that the feeding assembly can stably transport the treated sludge into the inner sleeve, the following technical solutions are provided.

[0015] The feeding assembly includes a connecting cover, a feeding transmission cylinder, a mounting shaft A, and a spiral conveying blade A. The end of the inner sleeve is fixedly connected with an assembly pipe arranged on the outside of the outer sleeve. The connecting cover and the assembly pipe are kept in a rotating arrangement. The feeding transmission cylinder and the connecting cover are kept coaxially fixed. The feeding transmission cylinder extends into the inner sleeve. An air induced air chamber is provided between the connecting cover, the assembly pipe and the feeding transmission cylinder. The air induced air chamber is connected to the inner sleeve. The mounting shaft A is rotatably installed at the axis center of the feeding transmission cylinder. The spiral conveying blade A is fixed to the mounting shaft A and keeps in contact with the inner wall of the feeding transmission cylinder.

[0016] In some of the implementations, in order to ensure that the slag discharge assembly can be matched with the outer sleeve and that the slag discharge assembly can discharge the sludge particles that have been transported in the outer sleeve and have been crushed, dried and incinerated, the following technical solutions are provided.

[0017] The slag discharge assembly includes an assembly cover, a collection cover, a slag discharge transmission cylinder, a mounting shaft B, and a spiral conveying blade B. The assembly cover is arranged on the periphery of the outer sleeve, and the assembly cover is arranged close to one side of the feeding assembly. The side wall of the outer sleeve is provided with a slag through hole arranged on the inner side of the assembly cover.

[0018] The collecting cover is connected to the bottom of the assembly cover, the slag discharge transmission cylinder is fixedly connected to the collecting cover, the installation shaft B is rotatably installed in the collecting cover and the slag discharge transmission cylinder, and the spiral conveying blade B is fixedly connected to the installation shaft B and keeps in contact with the inner wall of the collecting cover and the slag discharge transmission cylinder.

[0019] In some of the implementations, in order to ensure that the driving assembly can drive the double-kettle rotary kiln to operate stably around its own axis as a whole, the following technical solutions are provided.

[0020] The driving assembly includes a reduction motor, a driving shaft, and a driving gear. The output shaft of the reduction motor is fixedly connected to the driving shaft. The driving gear is fixedly connected to the driving shaft. The end of the inner sleeve is fixedly connected to a transmission gear arranged on the outside of the outer sleeve. The transmission gear is meshingly connected to the driving gear.

[0021] In some of the implementations, in order to ensure that the driving component can drive the feeding component and the slag discharge component to operate synchronously while driving the double-kettle rotary kiln to operate stably, the following technical solutions are provided.

[0022] The drive shaft is fixedly connected with a driving sprocket A and a driving sprocket B. The mounting shaft A is fixedly connected with a transmission sprocket A. The transmission sprocket A realizes chain transmission with the driving sprocket A through a chain. The mounting shaft B is fixedly connected with a transmission sprocket B. The transmission sprocket B realizes chain transmission with the driving sprocket B through a chain.

[0023] In some of the implementations, in order to ensure that the hot air flow generated by the combustion assembly can be effectively collected and uniformly discharged when it is transmitted along the outer sleeve and the inner sleeve to the assembly cover and the air induction cavity, the following technical solutions are provided.

[0024] The connecting cover is fixedly connected with an air induction interface A, the top of the assembly cover is fixedly connected with an air induction interface B, and the air induction interface A and the air induction interface B are connected with an air induction fan through an air induction pipe A and an air induction pipe B respectively.

[0025] In some of the implementations, in order to ensure that the breaking and crushing mechanism can effectively break and scatter the sludge according to the different drying stages, the following technical solutions are provided.

[0026] The breaking and crushing mechanism includes a hollow sleeve and a mesh structure and a V-shaped structure fixed to the hollow sleeve. The mesh structure and the V-shaped structure are distributed in a circular array on the hollow sleeve. The mesh structure is arranged close to one side of the feeding component, and the V-shaped structure is arranged close to one side of the combustion component. The hollow sleeve is fixed to the inner sleeve and maintains a coaxial arrangement with the inner sleeve.

[0027] Beneficial effects of the present invention: 1. Double-kettle rotary kiln design: The double-kettle rotary kiln can compactly combine the inner and outer sleeves, which not only saves the floor space of the equipment, but also reduces the contact area between the equipment surface and the outside world, thereby effectively reducing heat loss and improving energy utilization. In addition, the compact design of the equipment helps to reduce floor space requirements and reduce installation and operating costs.

[0028] 2. Breaking and crushing mechanism for sludge viscosity characteristics: According to the viscosity characteristic curve of sludge, the present invention designs breaking and crushing mechanisms at different positions, which respectively adopt mesh structure and V-shaped structure. These mechanisms can break highly viscous sludge into fine particles, significantly increase the specific surface area of ​​sludge, improve the heat and mass transfer efficiency of sludge during drying and incineration, and reduce the residence time required for sludge during incineration, further improving the output of sludge treatment.

[0029] 3. Variable pitch spiral blades: By designing variable pitch spiral blades, this equipment can maintain smooth transportation during the sludge drying stage and avoid blockage problems. At the same time, the structure of the spiral blades ensures that the sludge has sufficient residence time during the incineration stage, so that the sludge particles can be fully burned and ensure the thoroughness of the incineration process.

[0030] 4. J-type lifting plate optimizes energy utilization: The J-type lifting plate can scatter the sludge during transportation to form a material curtain, and make the sludge particles fully contact with the outer flame of the flame. This design not only accelerates the ignition of the sludge, but also significantly improves the energy utilization efficiency during the incineration process, thereby improving the overall effect of sludge drying and incineration.

[0031] 5. Efficient hot air heat exchange design: The heat generated during the sludge incineration process directly passes through the burner of the combustion component to form hot air, and conducts convection heat exchange with the wet sludge entering the equipment. This direct heat exchange method reduces the intermediate links of traditional heat recovery, significantly improves the energy utilization efficiency of the drying stage, shortens the drying time, and improves the operating efficiency of the equipment.

[0032] In general, this solution improves the energy utilization, sludge treatment efficiency and compactness of the integrated sludge drying and incineration equipment through multi-faceted technological innovations, and has high application value and economic benefits. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 It is a structural schematic diagram of the present invention; Figure 2 It is a structural schematic diagram of another perspective of the present invention; Figure 3 It is a structural diagram of the outer sleeve, inner sleeve and combustion assembly; Figure 4 It is a structural schematic diagram of the matching combination of the outer sleeve, the inner sleeve and the slag discharge assembly; Figure 5 for Figure 4 A schematic diagram of the structure from another perspective; Figure 6 It is a structural schematic diagram of the matching combination of the inner sleeve and the feeding assembly; Figure 7 It is a schematic diagram of the structure of the driving assembly and related parts; Figure 8 It is a structural diagram of the combination of the inner sleeve, the variable pitch spiral blade and the J-shaped lifting plate; Fig. 9 It is a structural diagram of the breaking and crushing mechanism; Fig.10 It is a structural schematic diagram of the combination of a mesh screen structure and a hollow sleeve; Fig.11 It is a structural schematic diagram of a V-shaped structure and a hollow sleeve combination.

[0034] In the figure: 1 double-kettle rotary kiln, 11 outer sleeve, 111 blocking plate, 112 guide ring, 113 support wheel, 114 support seat, 115 slag through hole, 12 inner sleeve, 121 connecting bracket, 122 connecting plate, 123 assembly pipe, 124 transmission gear, 13 outer spiral blade, 14 variable pitch spiral blade, 15 J-type lifting plate, 16 breaking and crushing mechanism, 161 hollow sleeve, 162 mesh screen structure, 163 V-type structure, 2 combustion assembly, 21 combustion chamber, 211 explosion-proof port, 212 support frame A, 213 maintenance port, 214 dust exhaust pipe, 22 burner, 221 support frame B, 23 adjustable fish scale, 3 feeding assembly, 31 connecting cover, 311 support Support frame C, 312 induced draft interface A, 313 induced draft duct A, 32 feeding transmission cylinder, 321 feeding pipe, 322 assembly bracket A, 33 installation shaft A, 331 transmission sprocket A, 34 spiral conveying blade A, 35 induced draft chamber, 4 slag discharge component, 41 assembly cover, 411 support frame D, 412 fish scale sealing ring, 413 induced draft interface B, 414 induced draft duct B, 42 collection cover, 43 slag discharge transmission cylinder, 431 assembly bracket B, 44 installation shaft B, 441 transmission sprocket B, 45 spiral conveying blade B, 5 driving component, 51 reduction motor, 511 support frame E, 52 driving shaft, 521 driving gear, 522 driving sprocket A, 523 driving sprocket B. DETAILED DESCRIPTION

[0035] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0036] Example 1

[0037] See also Figure 1-Figure 3 , Figure 8 A horizontal sludge drying and incineration integrated equipment includes a matching combination of a double-kettle rotary kiln 1, a combustion component 2, a feeding component 3, and a slag discharge component 4. The combustion component 2 and the feeding component 3 are respectively assembled at both ends of the double-kettle rotary kiln 1, and the slag discharge component 4 is assembled below the double-kettle rotary kiln 1.

[0038] The utility model also comprises a driving assembly 5 , which is connected to the double-kettle rotary kiln 1 , the feeding assembly 3 , and the slag discharging assembly 4 by power.

[0039] The double-kettle rotary kiln 1 comprises an outer sleeve 11 and an inner sleeve 12 which are concentrically fixed. The outer sleeve 11 is matched with a combustion assembly 2 and a slag discharge assembly 4 , and the inner sleeve 12 is rotationally connected with a feeding assembly 3 .

[0040] The double-kettle rotary kiln 1 also includes an outer spiral blade 13, a variable pitch spiral blade 14, a J-shaped lifting plate 15, and a scattering and crushing mechanism 16. The outer spiral blade 13 is fixedly connected to the inner wall of the outer sleeve 11, and the variable pitch spiral blade 14 is fixedly connected to the inner wall of the inner sleeve 12. The spiral directions of the outer spiral blade 13 and the variable pitch spiral blade 14 are arranged in opposite directions. The spacing of the variable pitch spiral blade 14 near the side of the feeding component 3 is greater than the spacing of the variable pitch spiral blade 14 near the side of the combustion component 2. The J-shaped lifting plate 15 is fixedly connected to the inner sleeve 12 and distributed in a ring array. The scattering and crushing mechanism 16 is fixedly connected to the inner sleeve 12 and arranged near the side of the feeding component 3.

[0041] When the sludge is dried and incinerated, the driving assembly 5 drives the double-kettle rotary kiln 1, the feeding assembly 3, and the slag discharge assembly 4 to operate. The feeding assembly 3 conveys the treated sludge to the inner sleeve 12, and the variable pitch spiral blades 14 in the inner sleeve 12 drive it to move toward the combustion assembly 2. The variable pitch spiral blades 14 have a larger spacing near the feeding assembly 3, which can prevent the sludge initially input with a large water content and viscosity from sticking and clogging in the inner sleeve 12.

[0042] The combustion component 2 can fully burn natural gas or biomass fuel, provide stable high temperature and combustion space for sludge incineration, and ignite sludge particles. The hot air generated by the combustion component 2 mainly flows in the inner sleeve 12 to the side of the upper material component 3, which is opposite to the direction of the sludge transmission in the inner sleeve 12, and cooperates with the scattering and crushing mechanism 16 to scatter and crush the transmitted sludge, so that when the sludge is transmitted from the inner sleeve 12 to the side of the combustion component 2, the sludge that has been scattered, crushed, and dried can be burned, and the sludge particles after combustion enter the outer sleeve 11, and are driven by the outer spiral blades 13 to be transmitted from the side of the combustion component 2 to the side of the upper material component 3, and then the sludge particles transmitted in the outer sleeve 11 are discharged to the outside of the equipment through the slag discharge component 4.

[0043] The double-kettle rotary kiln 1 is composed of two outer sleeves 11 and an inner sleeve 12 of different diameters, which are coaxially fixedly installed. This structure improves the design of the traditional single-drum rotary kiln and can integrate the overlong rotary drum into the equipment with a shorter shaft length, which can not only save the equipment floor space, but also reduce the contact surface area between the equipment and the outside world, thereby reducing energy dissipation.

[0044] The breaking and crushing mechanism 16 installed in the inner sleeve 12 can break up and crush the sludge according to the different moisture content and viscosity of the sludge, ensuring that the particle size of the sludge is controlled at a smaller size during incineration, reducing energy consumption and also reducing the time required for incineration of sludge particles, thereby increasing production capacity.

[0045] During the stage where the sludge is transported and dried in the inner sleeve 12, the volume of the initially input sludge is relatively large. To ensure that the sludge can be smoothly transported to the incineration area on one side of the feeding component 3 without being blocked, the pitch of the variable-pitch spiral blades 14 is relatively large. As the moisture content of the dried sludge decreases, the volume decreases, and the pitch of the conveying spiral blades gradually decreases. The pitch reaches a relatively small value in the sludge incineration area, which fully ensures the residence time of the sludge particles during incineration.

[0046] The structural characteristics of the J-shaped lifting plate 15 can fully lift the sludge mass or sludge particles to the upper part of the inner sleeve 12 and drop them to form a material curtain, fully improve the discreteness of the sludge throwing, and increase the specific surface area of ​​the sludge drying and incineration.

[0047] Example 2

[0048] See also Figure 1-Figure 3 In order to ensure that the outer sleeve 11 and the inner sleeve 12 in the double-kettle rotary kiln 1 can be stably fixed together and realize the design requirement of stable operation around its own axis, and to ensure that the outer sleeve 11, the inner sleeve 12 and the components installed therein can maintain synchronous operation, the following technical solution is provided.

[0049] A sealing plate 111 is fixedly connected to one end of the outer sleeve 11 close to the feeding assembly 3, and a connecting bracket 121 and a connecting plate 122 are fixedly connected to both ends of the inner sleeve 12. The connecting plate 122 is fixedly connected to the sealing plate 111, and the connecting bracket 121 is fixedly connected to the inner wall of the outer sleeve 11.

[0050] The outer walls at both ends of the outer sleeve 11 are fixedly connected with guide rings 112. The bottom of the guide ring 112 is equipped with two groups of supporting wheels 113 that are symmetrically arranged. The supporting wheels 113 and the guide ring 112 are matched and combined in a relatively rolling posture.

[0051] The connecting bracket 121 and the connecting plate 122 are fixed to the inner sleeve 12 by welding, and the connecting plate 122 and the sealing plate 111 are fixed and combined by bolts, and the connecting bracket and the outer sleeve 11 are also fixed and combined by bolts, which can facilitate the disassembly and assembly of the outer sleeve 11 and the inner sleeve 12, and facilitate the processing and forming of the double-kettle rotary kiln 1.

[0052] The cooperation between the guide ring 112 and the support wheel 113 can ensure that the outer sleeve 11 is stably installed in a relatively rotating posture. Under the limiting action of the support wheel 113, the guide ring 112 can stably rotate around its own axis, thereby ensuring the stable progress of the sludge drying, crushing, incineration and other processes.

[0053] In addition, a support seat 114 is provided, and a support wheel 113 is mounted on the support seat 114 to support and position the double-kettle rotary kiln 1 together, so that the double-kettle rotary kiln 1 is installed horizontally at a specific horizontal height.

[0054] In order to ensure that the outer sleeve 11 can be matched with the combustion component 2, to ensure that the combustion component 2 can fully burn the dried and broken up sludge, and to provide heat for the sludge continuously input into the inner sleeve 12, the following technical solution is provided.

[0055] The combustion assembly 2 includes a combustion chamber 21 and a burner 22. The outer sleeve 11 is connected to the combustion chamber 21, and an adjustable fish scale 23 is installed in the gap between the outer sleeve 11 and the combustion chamber 21. The burner 22 is connected to the axis of the combustion chamber 21 and is arranged relative to the inner sleeve 12. An explosion-proof opening 211 is opened on the top of the combustion chamber 21.

[0056] The combustion chamber 21 is fixedly mounted on the support frame A212, which positions the combustion chamber 21 at a specific height and docks it with the outer sleeve 11, while the burner 22 is fixedly mounted on the support frame B221 so that the burner 22 can dock stably with the combustion chamber 21.

[0057] A cover is provided on the explosion-proof opening 211, and the cover is pressed on the explosion-proof opening 211 by its own weight. When the pressure in the combustion chamber 21 is high, the cover can be lifted up to release the pressure to prevent the combustion chamber 21 from exploding. The burner 22 is used for combustion and provides an auxiliary heat source for the drying and incineration of sludge. The fuel can be natural gas, fuel oil or biomass. The burner 22 is equipped with a blasting device, which can blow the air required for fuel combustion and sludge incineration into the interior of the equipment according to a certain proportion. At the same time, the heat generated by fuel combustion and sludge residue incineration can be blown to one side of the feeding assembly 3 in the inner sleeve 12, which is convenient for the equipment to collect tail gas. At the same time, the wet sludge enters the equipment from the feeding mechanism at the tail gas collection end of the equipment, and undergoes convection heat exchange with the internal hot air to provide heat for the sludge drying stage.

[0058] The combustion chamber 21 is provided with a heat preservation structure, and the heat preservation structure adopts low thermal conductivity material to effectively isolate the high temperature of the combustion chamber 21, ensuring that the external temperature reaches the relevant equipment standards when the equipment is running, and also reducing the heat dissipation of the equipment.

[0059] The combustion chamber 21 provides combustion space for the auxiliary heat source. There is a gap between the combustion chamber 21 and the outer sleeve 11. The adjustable fish scale 23 installed in the gap is driven by a motor to adjust the air intake of the combustion chamber 21, so that natural gas or biomass fuel can be fully burned in this area, providing stable high temperature and combustion space for sludge incineration, and igniting sludge particles. At the same time, the fuel burner is equipped with an electronic proportional control valve, which can control the proportion of air content entering the equipment and provide sufficient air for sludge incineration.

[0060] A maintenance port 213 is also provided at the bottom of the combustion chamber 21 , and the maintenance port 213 is detachably connected to a dust exhaust pipe 214 . The interior of the combustion chamber 21 can be maintained through the maintenance port 213 , and a small amount of sludge particles or dust entering the maintenance port 213 can be discharged through the dust exhaust pipe 214 .

[0061] Example 3

[0062] See also Figure 4-Figure 6 In order to ensure that the feeding assembly 3 can be matched with the inner sleeve 12 and that the feeding assembly 3 can stably transport the treated sludge into the inner sleeve 12, the following technical solution is provided.

[0063] The feeding assembly 3 includes a connecting cover 31, a feeding transmission cylinder 32, a mounting shaft A33, and a spiral conveying blade A34. The end of the inner sleeve 12 is fixedly connected with an assembly pipe 123 arranged on the outside of the outer sleeve 11. The connecting cover 31 and the assembly pipe 123 are kept in a rotating arrangement. The feeding transmission cylinder 32 and the connecting cover 31 are kept coaxially fixed. The feeding transmission cylinder 32 extends into the inner sleeve 12. An air induced draft chamber 35 is arranged between the connecting cover 31, the assembly pipe 123 and the feeding transmission cylinder 32. The air induced draft chamber 35 is connected to the inner sleeve 12. The mounting shaft A33 is rotatably installed at the axis center of the feeding transmission cylinder 32. The spiral conveying blade A34 is fixed to the mounting shaft A33 and keeps in contact with the inner wall of the feeding transmission cylinder 32.

[0064] The matching combination of the connecting cover 31 and the assembly pipe 123 can realize the rotational connection between the feeding component 3 and the inner sleeve 12, and enclose an air induction chamber 35 which is connected to the inner sleeve 12 together with the inner feeding transmission cylinder 32, so that the hot air output from the inner sleeve 12 can enter the air induction chamber 35 for discharge.

[0065] The connection cover 31 is fixedly mounted on the support frame C311 to ensure that the connection cover 31 and the loading assembly 3 are stably installed at a specific height position.

[0066] A loading pipe 321 is fixedly connected to the outer end of the loading transmission cylinder 32 to ensure that the treated sludge is stably transported to the loading transmission cylinder 32 through the loading pipe 321. An assembly bracket A322 is fixedly connected to the inner end of the loading transmission cylinder 32 to ensure that the mounting shaft A33 is stably mounted on the assembly bracket A322 in a relatively rotating manner and maintains a coaxial arrangement with the loading transmission cylinder 32.

[0067] When the driving assembly 5 drives the mounting shaft A33 and the spiral conveying blades A34 thereon to operate, the sludge in the feeding conveying cylinder 32 can be stably conveyed to the inner sleeve 12 .

[0068] In order to ensure that the slag discharge assembly 4 can be matched with the outer sleeve 11 and to ensure that the slag discharge assembly 4 can discharge the sludge particles transmitted in the outer sleeve 11 and after crushing, drying and incineration, the following technical solution is provided.

[0069] The slag discharge assembly 4 includes an assembly cover 41, a collection cover 42, a slag discharge transmission cylinder 43, a mounting shaft B44, and a spiral conveying blade B45. The assembly cover 41 is arranged on the periphery of the outer sleeve 11. The assembly cover 41 is arranged close to one side of the feeding assembly 3. A slag through hole 115 arranged on the inner side of the assembly cover 41 is opened on the side wall of the outer sleeve 11.

[0070] A collecting cover 42 is connected to the bottom of the assembly cover 41, and a slag discharge transmission cylinder 43 is fixedly connected to the collecting cover 42. The mounting shaft B44 is rotatably mounted in the collecting cover 42 and the slag discharge transmission cylinder 43. The spiral conveying blade B45 is fixedly connected to the mounting shaft B44 and keeps in contact with the inner walls of the collecting cover 42 and the slag discharge transmission cylinder 43.

[0071] The assembly cover 41 is fixedly mounted on the support frame D411 to ensure that the assembly cover 41 is stably installed at a specific height position and realizes a matching combination with the outer sleeve 11.

[0072] When the outer sleeve 11 and the outer spiral blades 13 transport the dried and incinerated sludge particles, the sludge particles can enter the assembly cover 41 through the slag through hole 115, and then be collected by the collecting cover 42 and enter the slag discharge transmission cylinder 43. When the installation shaft B44 drives the spiral conveying blades B45 to rotate, the slag can be driven to be discharged outward along the slag discharge transmission cylinder 43.

[0073] An assembly bracket B431 is fixedly connected to the outer end of the slag discharge transmission cylinder 43 to ensure that the installation shaft B44 is installed on the assembly bracket B431 in a relatively rotatable manner, and the installation shaft B44 and the slag discharge transmission cylinder 43 are kept coaxially arranged. A fish scale sealing ring 412 is installed in the gap between the assembly cover 41 and the outer sleeve 11 to ensure the sealing effect of the connection between the assembly cover 41 and the outer sleeve 11 and prevent residual hot air in the equipment from entering the assembly cover 41 and leaking out from the connection between the assembly cover 41 and the outer sleeve 11.

[0074] Example 4

[0075] See also Figure 5-Figure 7 In order to ensure that the driving assembly 5 can drive the double-kettle rotary kiln 1 to operate stably around its own axis as a whole, the following technical solution is provided.

[0076] The driving assembly 5 includes a reduction motor 51, a driving shaft 52, and a driving gear 521. The output shaft of the reduction motor 51 is fixedly connected to the driving shaft 52. The driving gear 521 is fixedly connected to the driving shaft 52. The end of the inner sleeve 12 is fixedly connected to a transmission gear 124 arranged on the outside of the outer sleeve 11. The transmission gear 124 is meshingly connected to the driving gear 521.

[0077] The reduction motor 51 is fixedly installed on the support frame E511. When the reduction motor 51 is running, it can drive the driving shaft 52 and the driving gear 521 to operate stably, and then drive the transmission gear 124 and the inner sleeve 12 to operate stably. Since the transmission gear 124 is arranged on the outside of the outer sleeve 11, it can be connected to the driving component 5 which is also arranged on the outside of the outer sleeve 11. Since the outer sleeve 11 and the inner sleeve 12 are fixedly connected, the driving component 5 can drive the outer sleeve 11 and the inner sleeve 12 to operate stably around their own axis.

[0078] In order to ensure that the driving component 5 can drive the feeding component 3 and the slag discharging component 4 to operate synchronously while driving the double-kettle rotary kiln 1 to operate stably, the following technical solution is provided.

[0079] A driving sprocket A522 and a driving sprocket B523 are fixedly connected to the driving shaft 52, a transmission sprocket A331 is fixedly connected to the mounting shaft A33, and the transmission sprocket A331 realizes chain transmission with the driving sprocket A522 through a chain, and a transmission sprocket B441 is fixedly connected to the mounting shaft B44, and the transmission sprocket B441 realizes chain transmission with the driving sprocket B523 through a chain.

[0080] When the reduction motor 51 drives the drive shaft 52 and the drive sprocket A522 and the drive sprocket B523 thereon to operate, it can drive the transmission sprocket A331 and the transmission sprocket B441 to operate stably through the chain, so as to drive the installation shaft A33, the spiral conveying blade A34, the installation shaft B44, and the spiral conveying blade B45 to operate stably.

[0081] As shown in the accompanying drawings, as a specific implementation, since the feeding assembly 3 and the slag discharge assembly 4 drive the sludge or slag to be transported in the same direction, and the running directions of the mounting shaft A33 and the mounting shaft B44 are the same, the spiral conveying blade A34 and the spiral conveying blade B45 are arranged in the same spiral direction. When the power of the reduction motor 51 is transmitted to the inner sleeve 12 and the outer sleeve 11 through the combination of the driving gear 521 and the transmission gear 124, the running direction changes. In order to ensure that the sludge and the slag after combustion are transmitted in the inner sleeve 12 and the outer sleeve 11 according to the set requirements, the spiral direction of the outer spiral blade 13 is the same as that of the spiral conveying blade A34 and the spiral conveying blade B45, and the spiral direction of the variable pitch spiral blade 14 is opposite to that of the spiral conveying blade A34 and the spiral conveying blade B45.

[0082] Example 5

[0083] See also Figure 1-Figure 2 , Figure 4-Figure 7 In order to ensure that the hot air flow generated by the combustion assembly 2 can be effectively collected and uniformly discharged when it is transmitted along the outer sleeve 11 and the inner sleeve 12 to the assembly cover 41 and the air induction chamber 35, the following technical solution is provided.

[0084] An air induced draft interface A312 is fixedly connected to the connection cover 31, and an air induced draft interface B413 is fixedly connected to the top of the assembly cover 41. The air induced draft interface A312 and the air induced draft interface B413 are connected to the draft fan through the air induced draft duct A313 and the air induced draft duct B414 respectively.

[0085] For the loading component 3, the hot air flow in the inner sleeve 12 can be transmitted along the induced draft interface A312 and the induced draft duct A313 after entering the induced draft chamber 35. For the slag discharge component 4, the hot air flow in the outer sleeve 11 enters the assembly cover 41 through the slag through hole 115, and then is transmitted along the induced draft interface B413 and the induced draft duct B414. The hot air flow and the exhaust gas are uniformly transmitted and discharged through the negative pressure environment provided by the induced draft fan, and the exhaust gas is purified to meet the emission standards before being discharged into the environment.

[0086] The induced draft fan can collect the exhaust gas generated by the sludge drying and incineration inside the equipment and transport it to the exhaust gas treatment equipment. At the same time, it can make the inside of the equipment in a slightly negative pressure state, which can reduce the sealing requirements of the equipment and prevent the exhaust gas generated inside from overflowing.

[0087] Example 6

[0088] See also Figure 9-11 In order to ensure that the breaking and crushing mechanism 16 can effectively break and scatter the sludge according to different drying stages, the following technical solutions are provided.

[0089] The breaking and crushing mechanism 16 includes a hollow sleeve 161 and a mesh structure 162 and a V-shaped structure 163 fixed to the hollow sleeve 161. The mesh structure 162 and the V-shaped structure 163 are distributed in a circular array on the hollow sleeve 161. The mesh structure 162 is arranged close to the feeding component 3, and the V-shaped structure 163 is arranged close to the combustion component 2. The hollow sleeve 161 is fixed to the inner sleeve 12 and maintains a coaxial arrangement with the inner sleeve 12.

[0090] The end of the hollow sleeve 161 is fixedly connected to the inner sleeve 12 by welding, and the hollow sleeve 161, the mesh structure 162, and the V-shaped structure 163 are all made of steel bar bending and welding. The hollow sleeve 161 can provide a stable assembly carrier for the mesh structure 162 and the V-shaped structure 163. The mesh structure 162 can break up the initially input sludge clumps during the operation with the inner sleeve 12, and the V-shaped structure 163 can crush the sludge particles when it runs with the inner sleeve 12.

[0091] When the sludge has a high moisture content, the sludge is usually solidified into a mass due to its viscosity and is in a paste state. At this time, the sludge can adhere to the mesh structure 162 of the equipment. The more sludge masses adhered to the mesh structure 162, the higher its thermal energy utilization rate. When the moisture content of the sludge is reduced to 30%-40%, the viscosity of the sludge is greatly reduced. At this time, the sludge needs to be crushed with the help of the V-shaped structure 163 to crush the sludge particles into a certain particle size to reduce the difficulty of heat and mass transfer of the sludge, so that the sludge drying rate is faster, and it is also simpler and more fully incinerated. The breaking and crushing mechanism 16 is welded to the inner sleeve 12 through a connecting rod.

[0092] By designing a disintegrating and crushing mechanism 16 with a different structure, when the sludge viscosity is high, the sludge is agglomerated and adhered to the disintegrating mechanism with the help of the screen structure 162, and the contact time with the hot air is longer and the contact area is larger. When the sludge viscosity is reduced to a certain value, the V-shaped structure 163 of the sludge contact can break up the sludge with low water content and low viscosity into small particles, ensuring that the particle size of the sludge is controlled at a smaller size during incineration, reducing energy consumption and also reducing the time required for incineration of sludge particles, thereby increasing production capacity.

[0093] Example 7

[0094] The working process of this equipment is: The sludge with high moisture content is first transported to the inner sleeve 12 in the double-kettle rotary kiln 1 through the feeding assembly 3. After entering the inner sleeve 12, the sludge with high moisture content is slowly pushed from the tail gas collection end of the inner sleeve 12 to the flame end through the variable pitch spiral blades 14 and the J-shaped lifting plate 15. In this process, the sludge gradually moves from the low temperature end to the high temperature section. The sludge with high moisture content goes through the low temperature preheating stage (100-200℃) to the medium temperature bacterial wall breaking stage (200-400℃) and then to the high temperature deep dehydration stage (400-650℃).

[0095] During the drying stage, natural gas is burned by the burner, and the flame is blown into the kettle of the equipment through the burner 22 of the combustion assembly 2, heating the air in the inner sleeve 12. The heated air undergoes convective heat exchange with the sludge surface and the wall of the inner sleeve 12, thereby achieving the purpose of sludge drying. At the same time, the combustion of natural gas produces radiation heat exchange with the sludge surface and the wall of the equipment, and the wall of the equipment and the sludge surface undergo heat conduction.

[0096] In the incineration stage, the sludge is pushed to the natural gas combustion flame, and the sludge is lifted by the J-shaped lifting plate 15 to contact the outer flame of the natural gas combustion. The temperature of the equipment here reaches 650-1100°C. Since the sludge has a high organic matter content, small particles and low water content, the sludge particles can be preheated and ignited for incineration.

[0097] The ignited sludge continues to burn when the inner sleeve 12 falls into the outer sleeve 11, releasing internal heat and completely decomposing the volatilized toxic and harmful organic gases into inorganic gases, reducing the difficulty and pressure of subsequent tail gas treatment. Then the outer sleeve 11 enters the cooling stage.

[0098] The cooled slag is pushed to the slag discharge assembly 4 by the outer spiral blades 13 arranged in the opposite direction in the outer sleeve 11, and then discharged from the equipment.

[0099] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

[0100] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A horizontal sludge drying and incineration integrated equipment, characterized by: The invention comprises a double-kettle rotary kiln (1), a combustion assembly (2), a feeding assembly (3), and a slag discharge assembly (4) in a matching combination, wherein the combustion assembly (2) and the feeding assembly (3) are respectively mounted at two ends of the double-kettle rotary kiln (1), and the slag discharge assembly (4) is mounted below the double-kettle rotary kiln (1); It also includes a driving assembly (5), wherein the driving assembly (5) is power-connected to the double-kettle rotary kiln (1), the loading assembly (3), and the slag discharge assembly (4); The double-kettle rotary kiln (1) comprises an outer sleeve (11) and an inner sleeve (12) which are concentrically fixedly connected, the outer sleeve (11) being assembled with a combustion assembly (2) and a slag discharge assembly (4), and the inner sleeve (12) being rotationally connected with a loading assembly (3); The double-kettle rotary kiln (1) further comprises an outer spiral blade (13), a variable pitch spiral blade (14), a J-shaped material lifting plate (15), and a scattering and crushing mechanism (16). The outer spiral blade (13) is fixedly connected to the inner wall of the outer sleeve (11), and the variable pitch spiral blade (14) is fixedly connected to the inner wall of the inner sleeve (12). The spiral directions of the outer spiral blade (13) and the variable pitch spiral blade (14) are arranged in opposite directions. The pitch of the variable pitch spiral blade (14) close to the side of the feeding component (3) is greater than the pitch of the variable pitch spiral blade (14) close to the side of the combustion component (2). The J-shaped material lifting plate (15) is fixedly connected to the inner sleeve (12) and distributed in a ring array. The scattering and crushing mechanism (16) is fixedly connected to the inner sleeve (12) and arranged close to the side of the feeding component (3).

2. The horizontal sludge drying and incineration integrated equipment according to claim 1 is characterized in that: A sealing plate (111) is fixedly connected to one end of the outer sleeve (11) close to the loading assembly (3), and a connecting bracket (121) and a connecting plate (122) are respectively fixedly connected to the two ends of the inner sleeve (12), the connecting plate (122) is fixedly connected to the sealing plate (111), and the connecting bracket (121) is fixedly connected to the inner wall of the outer sleeve (11); The outer walls at both ends of the outer sleeve (11) are fixedly connected with guide rings (112), and the bottom of the guide ring (112) is equipped with two groups of symmetrically arranged support wheels (113), and the support wheels (113) and the guide ring (112) are matched and combined in a relatively rolling posture.

3. The horizontal sludge drying and incineration integrated equipment according to claim 2 is characterized by: The combustion assembly (2) comprises a combustion chamber (21) and a burner (22); the outer sleeve (11) is connected to the combustion chamber (21); an adjustable fish scale (23) is installed at the gap between the outer sleeve (11) and the combustion chamber (21); the burner (22) is connected to the axis of the combustion chamber (21) and is arranged relative to the inner sleeve (12); and an explosion-proof opening (211) is opened at the top of the combustion chamber (21).

4. The horizontal sludge drying and incineration integrated equipment according to claim 1 is characterized in that: The feeding assembly (3) comprises a connecting cover (31), a feeding transmission cylinder (32), a mounting shaft A (33), and a spiral conveying blade A (34); the end of the inner sleeve (12) is fixedly connected to an assembly pipe (123) arranged on the outside of the outer sleeve (11); the connecting cover (31) and the assembly pipe (123) are rotatably arranged; the feeding transmission cylinder (32) and the connecting cover (31) are coaxially fixedly connected; the feeding transmission cylinder (32) extends into the inner sleeve (12); an air induction chamber (35) is arranged between the connecting cover (31), the assembly pipe (123), and the feeding transmission cylinder (32); the air induction chamber (35) is connected to the inner sleeve (12); the mounting shaft A (33) is rotatably mounted at the axis of the feeding transmission cylinder (32); the spiral conveying blade A (34) is fixedly connected to the mounting shaft A (33) and is in close contact with the inner wall of the feeding transmission cylinder (32).

5. The horizontal sludge drying and incineration integrated equipment according to claim 4 is characterized in that: The slag discharge assembly (4) comprises an assembly cover (41), a collection cover (42), a slag discharge transmission cylinder (43), a mounting shaft B (44), and a spiral conveying blade B (45); the assembly cover (41) is arranged on the periphery of the outer sleeve (11); the assembly cover (41) is arranged close to a side of the feeding assembly (3); and a slag through hole (115) arranged on the inner side of the assembly cover (41) is formed on the side wall of the outer sleeve (11); The bottom of the assembly cover (41) is connected to the collecting cover (42), the slag discharge transmission cylinder (43) is fixedly connected to the collecting cover (42), the mounting shaft B (44) is rotatably mounted in the collecting cover (42) and the slag discharge transmission cylinder (43), and the spiral conveying blade B (45) is fixedly connected to the mounting shaft B (44) and keeps in contact with the inner walls of the collecting cover (42) and the slag discharge transmission cylinder (43).

6. The horizontal sludge drying and incineration integrated equipment according to claim 5 is characterized by: The driving assembly (5) comprises a reduction motor (51), a driving shaft (52), and a driving gear (521); the output shaft of the reduction motor (51) is fixedly connected to the driving shaft (52); the driving gear (521) is fixedly connected to the driving shaft (52); the end of the inner sleeve (12) is fixedly connected to a transmission gear (124) arranged on the outside of the outer sleeve (11); and the transmission gear (124) is meshingly connected to the driving gear (521).

7. The horizontal sludge drying and incineration integrated equipment according to claim 6, characterized in that: A driving sprocket A (522) and a driving sprocket B (523) are fixedly connected to the driving shaft (52); a transmission sprocket A (331) is fixedly connected to the mounting shaft A (33); the transmission sprocket A (331) is chain-driven with the driving sprocket A (522) through a chain; a transmission sprocket B (441) is fixedly connected to the mounting shaft B (44); the transmission sprocket B (441) is chain-driven with the driving sprocket B (523) through a chain.

8. The horizontal sludge drying and incineration integrated equipment according to claim 5, characterized in that: An air induction interface A (312) is fixedly connected to the connection cover (31), and an air induction interface B (413) is fixedly connected to the top of the assembly cover (41). The air induction interface A (312) and the air induction interface B (413) are connected to an induced draft fan via an air induction pipe A (313) and an air induction pipe B (414), respectively.

9. The horizontal sludge drying and incineration integrated equipment according to claim 1, characterized in that: The breaking and crushing mechanism (16) comprises a hollow sleeve (161) and a mesh structure (162) and a V-shaped structure (163) fixed to the hollow sleeve (161); the mesh structure (162) and the V-shaped structure (163) are distributed in a circular array on the hollow sleeve (161); the mesh structure (162) is arranged close to one side of the feeding component (3); the V-shaped structure (163) is arranged close to one side of the combustion component (2); the hollow sleeve (161) is fixed to the inner sleeve (12) and is arranged coaxially with the inner sleeve (12).

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