Lightweight nickel-free fire grate structure

Abstract

The lightweight nickel-free fire grate structure comprises a drying section fire grate structure, a combustion section fire grate structure and a burnout section fire grate structure which are arranged in a garbage incinerator and arranged from the input end to the output end. The drying section fire grate structure comprises a drying section fire grate supporting frame fixed to the inner side wall of the garbage incinerator, a plurality of drying section fixed row piece sets arranged in parallel are fixed to the drying section fire grate supporting frame, and a drying section sliding row piece set is slidably connected between every two adjacent drying section fixed row piece sets. The combustion section fire grate structure comprises a combustion section fire grate supporting frame fixed to the inner side wall of the garbage incinerator, a plurality of combustion section fixed row piece sets arranged in parallel are fixed to the combustion section fire grate supporting frame, and a combustion section sliding row piece set is slidably connected between every two adjacent combustion section fixed row piece sets. The fire grate structure is provided with an efficient air distribution structure, the air distribution effect of combustion-supporting air is improved, uniform air distribution and front edge penetration of primary air are achieved, and the uniformity and sufficiency of garbage combustion are improved.

Description

Technical Field

[0001] The present invention relates to the technical field of waste incinerators, and particularly to a lightweight nickel-free grate structure. Background Art

[0002] The push-type grate is a grate structure widely used in domestic waste incineration treatment systems. It forms a stepped inclined structure through the assembly of grate plates, and periodically reciprocates to push the grate plates through a hydraulic drive device, realizing the continuous advancement and uniform combustion of waste in the incineration furnace. This type of grate structure has the advantages of strong adaptability, high modularity, and good operation stability.

[0003] Currently, the grate plates of this grate adopt a standardized module design, and are assembled into rows through connecting parts such as pin shafts and tie rods. With the primary air provided by the bottom air chamber, the step-by-step advancement of waste, full combustion, and cooling protection of the grate are realized.

[0004] As an important component that directly contacts waste and bears high temperature, thrust, and air volume exchange, the structural design of the grate plate has a decisive impact on the operation stability, combustion efficiency, and heat load bearing capacity of the waste incineration system. In the traditional structure, the surface of the grate plate is relatively flat, and usually relies on the inclination angle to realize the self-weight advancement of waste; the form of the bottom air holes is single, and the air flow distribution is prone to deviation; at the same time, the overall structure is prone to problems such as heat stress accumulation and component deformation under long-term high temperature.

[0005] Although the existing grate structure has formed a mature system in application, its core component, the grate plate, still has the following deficiencies when dealing with the complex characteristics of current domestic waste such as "low calorific value, high moisture content, much plastic fiber, and uneven particle size":

[0006] 1. The primary air distribution efficiency is not high: The positions and shapes of the traditional air holes are fixed, and cannot effectively guide the primary air to uniformly penetrate the waste layer, resulting in problems such as air volume short circuit or incomplete combustion in the accumulation area.

[0007] 2. The heat dissipation efficiency is limited: The grate plate is prone to local overheating during long-term operation at high temperature. The existing structure lacks an effective heat dissipation design, and it is difficult to release heat stress, resulting in material fatigue, deformation, and even damage of the grate plate.

[0008] 3. The structural connection is not reliable: Under the existing assembly method, single grate plates are prone to the "lifting head" phenomenon during thermal expansion and contraction. The rigid connection of the tie rods lacks stress buffering at high temperature, and the overall structural stability is poor. Summary of the Invention

[0009] The purpose of the present invention is to provide a lightweight nickel-free grate structure. The grate plate combines the characteristics of waste, and systematically optimizes its surface structure, air distribution effect, heat dissipation performance, and assembly method, improving the overall operation stability and adaptability of the equipment.

[0010] To achieve the above object, the present invention provides the following technical solutions:

[0011] A lightweight nickel-free grate structure, comprising a drying section grate structure, a combustion section grate structure, and an afterburning section grate structure arranged in sequence from the input end to the output end inside a waste incinerator;

[0012] The drying section grate structure includes a drying section grate support frame fixed on the inner side wall of the waste incinerator. A plurality of parallel drying section fixed row piece groups are fixed on the drying section grate support frame, and a drying section sliding row piece group is slidably connected between two adjacent drying section fixed row piece groups;

[0013] The combustion section grate structure includes a combustion section grate support frame fixed on the inner side wall of the waste incinerator. A plurality of parallel combustion section fixed row piece groups are fixed on the combustion section grate support frame, and a combustion section sliding row piece group is slidably connected between two adjacent combustion section fixed row piece groups;

[0014] The afterburning section grate structure includes an afterburning section grate support frame fixed on the inner side wall of the waste incinerator. A plurality of parallel afterburning section fixed row piece groups are fixed on the afterburning section grate support frame, and an afterburning section sliding row piece group is slidably connected between two adjacent afterburning section fixed row piece groups.

[0015] Preferably, the drying section fixed row piece group is formed by juxtaposing a plurality of drying section fixed grate pieces. The bottom of the drying section fixed grate piece has a first fixed connection groove and a first structure receiving groove with an opening facing downwards. The upper side of the drying section fixed grate piece has a first main ventilation hole penetrating up and down, and the side of the drying section fixed grate piece has a first auxiliary ventilation hole;

[0016] A plurality of parallel first heat dissipation rib plates are provided in the first structure receiving groove;

[0017] Adjacent sides of each drying section fixed grate piece have first pin connection holes, and a first restraint pin is commonly connected in the first pin connection holes of adjacent sides of two adjacent drying section fixed grate pieces;

[0018] The drying section fixed grate piece has a first restraint pull rod fixing hole penetrating along the juxtaposed arrangement direction, and a first grate piece restraint pull rod is commonly passed through the first restraint pull rod fixing holes of a plurality of drying section fixed grate pieces;

[0019] The end of the first grate piece restraint pull rod is threadedly fixed with a first end restraint nut, and a plurality of first disc springs are provided in a pressing manner between the first end restraint nut and an adjacent drying section fixed grate piece;

[0020] A first wind deflector is fixed at the position of the first main ventilation hole in the first structure receiving groove.

[0021] Preferably, the drying section sliding grate plate group is formed by juxtaposing a plurality of drying section sliding grate plates. The bottom of the drying section sliding grate plate has a second fixed connection groove and a second structure accommodating groove with an opening facing downward. The upper side of the drying section sliding grate plate has a second main ventilation hole penetrating vertically, and the side of the drying section sliding grate plate has a second auxiliary ventilation hole;

[0022] There are a plurality of second heat dissipation rib plates arranged in parallel in the second structure accommodating groove;

[0023] Adjacent sides of each drying section sliding grate plate have second pin shaft connection holes, and a second restraint pin shaft is commonly connected in the second pin shaft connection holes on the adjacent sides of two adjacent drying section sliding grate plates;

[0024] The drying section sliding grate plate has a second restraint pull rod fixing hole penetrating along the juxtaposed arrangement direction, and a grate plate second restraint pull rod is commonly passed through the second restraint pull rod fixing holes of a plurality of drying section sliding grate plates;

[0025] The end of the grate plate second restraint pull rod is threadedly fixed with a second end restraint nut, and a plurality of second disc springs are provided in a pressing manner between the second end restraint nut and an adjacent drying section sliding grate plate;

[0026] A second wind baffle is fixed at the position of the second main ventilation hole in the second structure accommodating groove.

[0027] Note: The drying section fixed grate plate group and the drying section sliding grate plate group together form a stepped support structure, so that the garbage to be incinerated is located at the top of the drying section fixed grate plate group and the drying section sliding grate plate group;

[0028] There is a blast mechanism of the prior art below the drying section grate structure, which drives the air to flow from bottom to top, so that the air passes through the first main ventilation holes, the first auxiliary ventilation holes on the drying section fixed grate plates, and the second main ventilation holes, the second auxiliary ventilation holes on the drying section sliding grate plates, and uses the air flowing from bottom to top to dry the garbage to be incinerated.

[0029] Preferably, a drying section grate plate driving mechanism is provided below the drying section grate structure. The drying section grate plate driving mechanism includes a first driving support frame fixed on the inner side wall of the waste incinerator. A plurality of first hydraulic driving rods are fixed on the first driving support frame. The inner rod ends of the first hydraulic driving rods are commonly connected with a first linkage driving frame. A plurality of parallel first grate plate connection shafts are fixed on the top of the first linkage driving frame, and the first grate plate connection shafts are respectively clamped in the second fixed connection grooves of each drying section sliding grate plate group;

[0030] A first clamping restraint plate is fixed at the position of the second fixed connection groove on the lower side of the drying section sliding grate plate, and the first clamping restraint plate presses and restrains the outer side surface of the first grate plate connection shaft.

[0031] Description: Driven by the driving mechanism of the grate bars in the drying section, the waste to be incinerated gradually moves towards the grate structure in the combustion section;

[0032] The sliding grate bar group in the drying section can reciprocate between the fixed grate bar groups in the drying section. Driven by this relative movement between the sliding grate bar group and the fixed grate bar group in the drying section, the waste to be incinerated is further moved step by step along the stepped structure formed by the fixed grate bar group and the sliding grate bar group in the drying section.

[0033] Preferably, the fixed grate bar group in the combustion section is formed by juxtaposing a plurality of fixed grate bars in the combustion section. The bottom of the fixed grate bar in the combustion section has a third fixed connection groove and a third structure accommodating groove with an opening facing downwards. The upper side of the fixed grate bar in the combustion section has a third main ventilation hole that penetrates up and down, and the side of the fixed grate bar in the combustion section has a third auxiliary ventilation hole;

[0034] There are a plurality of third heat dissipation rib plates arranged in parallel in the third structure accommodating groove;

[0035] Adjacent sides of each fixed grate bar in the combustion section have third pin connection holes, and a third restraint pin is commonly connected in the third pin connection holes on the adjacent sides of two adjacent fixed grate bars in the combustion section;

[0036] The fixed grate bar in the combustion section has a third restraint pull rod fixing hole that penetrates along the juxtaposed arrangement direction. A grate bar third restraint pull rod is commonly inserted through the third restraint pull rod fixing holes of a plurality of fixed grate bars in the combustion section;

[0037] The end of the grate bar third restraint pull rod is fixed with a third end restraint nut, and a plurality of third disc springs are provided in a pressing manner between the third end restraint nut and an adjacent fixed grate bar in the combustion section;

[0038] A third wind baffle is fixed in the third structure accommodating groove at the position of the third main ventilation hole.

[0039] Preferably, the sliding grate bar group in the combustion section is formed by juxtaposing a plurality of sliding grate bars in the combustion section. The bottom of the sliding grate bar in the combustion section has a fourth fixed connection groove and a fourth structure accommodating groove with an opening facing downwards. The upper side of the sliding grate bar in the combustion section has a fourth main ventilation hole that penetrates up and down, and the side of the sliding grate bar in the combustion section has a fourth auxiliary ventilation hole;

[0040] There are a plurality of fourth heat dissipation rib plates arranged in parallel in the fourth structure accommodating groove;

[0041] Adjacent sides of each sliding grate bar in the combustion section have fourth pin connection holes, and a fourth restraint pin is commonly connected in the fourth pin connection holes on the adjacent sides of two adjacent sliding grate bars in the combustion section;

[0042] The combustion section sliding grate bars are provided with fourth restraint tie rod fixing holes that penetrate along the parallel arrangement direction, and a grate bar fourth restraint tie rod is commonly inserted through the fourth restraint tie rod fixing holes of multiple combustion section sliding grate bars;

[0043] At the end of the grate bar fourth restraint tie rod, a fourth end restraint nut is fixed by threading, and multiple fourth disc springs are arranged in a pressing manner between the fourth end restraint nut and an adjacent combustion section sliding grate bar;

[0044] A fourth wind baffle is fixed at the fourth main ventilation hole in the fourth structure accommodation groove.

[0045] Note: The combustion section fixed grate bar group and the combustion section sliding grate bar group together form a stepped support structure, so that the garbage to be incinerated is supported on the tops of the combustion section fixed grate bar group and the combustion section sliding grate bar group;

[0046] Below the combustion section grate structure, there is a blast mechanism of the prior art. During the garbage incineration process, it drives the air to flow from bottom to top, so that the air passes through the third main ventilation holes, third auxiliary ventilation holes on the combustion section fixed grate bars, and the fourth main ventilation holes, fourth auxiliary ventilation holes on the combustion section sliding grate bars, and the air flowing from bottom to top continuously mixes with the garbage during the incineration process, providing sufficient oxygen for the garbage incineration process and enabling the garbage to be fully burned out.

[0047] Preferably, a combustion section grate bar driving mechanism is provided below the combustion section grate structure. The combustion section grate bar driving mechanism includes a second driving support frame fixed on the inner side wall of the garbage incinerator. Multiple second hydraulic driving rods are fixed on the second driving support frame. The inner rod ends of the second hydraulic driving rods are commonly connected to a second linkage driving frame. Multiple parallel second grate bar connecting shafts are fixed on the top of the second linkage driving frame, and the second grate bar connecting shafts are respectively clamped in the fourth fixed connection grooves of each combustion section sliding grate bar group;

[0048] A second clamping restraint plate is fixed at the lower side of the combustion section sliding grate bar at the fourth fixed connection groove, and the second clamping restraint plate presses and restrains on the outer side surface of the second grate bar connecting shaft.

[0049] Note: The garbage to be incinerated gradually moves towards the burnout section grate structure under the drive of the combustion section grate bar driving mechanism. During this process, the garbage to be incinerated will be fully burned on the combustion section grate structure until it is burned into ashes;

[0050] The combustion section sliding grate bar group can reciprocally slide between the combustion section fixed grate bar groups. Driven by this relative movement between the combustion section sliding grate bar group and the combustion section fixed grate bar group, the garbage during the incineration process will gradually move forward step by step along the stepped structure formed by the combustion section fixed grate bar group and the combustion section sliding grate bar group.

[0051] Preferably, the fixed grate bar group in the burnout section is formed by juxtaposing a plurality of fixed grate bars in the burnout section. The bottom of the fixed grate bar in the burnout section has a fifth fixed connection groove and a fifth structure accommodating groove with a downward opening.

[0052] There are a plurality of fifth heat dissipation rib plates arranged in parallel in the fifth structure accommodating groove;

[0053] The adjacent sides of the fixed grate bar in the burnout section have fifth pin shaft connection holes, and a fifth restraint pin shaft is commonly connected in the fifth pin shaft connection holes on the adjacent sides of two adjacent fixed grate bars in the burnout section;

[0054] The fixed grate bar in the burnout section has fifth restraint pull rod fixing holes penetrating along the juxtaposed arrangement direction, and a fifth restraint pull rod for the grate bar is commonly inserted through the fifth restraint pull rod fixing holes of a plurality of fixed grate bars in the burnout section;

[0055] The end of the fifth restraint pull rod for the grate bar is threadedly fixed with a fifth end restraint nut, and a plurality of fifth disc springs are arranged in a pressing manner between the fifth end restraint nut and an adjacent fixed grate bar in the burnout section.

[0056] Preferably, the sliding grate bar group in the burnout section is formed by juxtaposing a plurality of sliding grate bars in the burnout section. The bottom of the sliding grate bar in the burnout section has a sixth fixed connection groove and a sixth structure accommodating groove with a downward opening.

[0057] There are a plurality of sixth heat dissipation rib plates arranged in parallel in the sixth structure accommodating groove;

[0058] The adjacent sides of the sliding grate bar in the burnout section have sixth pin shaft connection holes, and a sixth restraint pin shaft is commonly connected in the sixth pin shaft connection holes on the adjacent sides of two adjacent sliding grate bars in the burnout section;

[0059] The sliding grate bar in the burnout section has sixth restraint pull rod fixing holes penetrating along the juxtaposed arrangement direction, and a sixth restraint pull rod for the grate bar is commonly inserted through the sixth restraint pull rod fixing holes of a plurality of sliding grate bars in the burnout section;

[0060] The end of the sixth restraint pull rod for the grate bar is threadedly fixed with a sixth end restraint nut, and a plurality of sixth disc springs are arranged in a pressing manner between the sixth end restraint nut and an adjacent sliding grate bar in the burnout section.

[0061] Note: The fixed grate bar group and the sliding grate bar group in the burnout section jointly form a stepped support structure, so that the burned garbage is supported on the tops of the fixed grate bar group and the sliding grate bar group in the burnout section.

[0062] Preferably, a driving mechanism for the grate bars in the burnout section is provided below the grate structure in the burnout section. The driving mechanism for the grate bars in the burnout section includes a third driving support frame fixed on the inner side wall of the waste incinerator. A plurality of third hydraulic driving rods are fixed on the third driving support frame. The inner rod ends of the third hydraulic driving rods are jointly connected to a third linkage driving frame. A plurality of parallelly arranged third grate bar connecting shafts are fixed on the top of the third linkage driving frame. The third grate bar connecting shafts are respectively clamped in the sixth fixed connection grooves of the sliding grate bar groups in the burnout section;

[0063] A third clamping restraint plate is fixed at the position of the fourth fixed connection groove on the lower side of the sliding grate bars in the combustion section. The top of the third clamping restraint plate presses and restrains the outer side surface of the third grate bar connecting shaft.

[0064] Note: The burned waste moves gradually towards the output end of the waste incinerator under the drive of the driving mechanism for the grate bars in the burnout section, and finally the burned waste is discharged from the output end of the waste incinerator;

[0065] The sliding grate bar groups in the burnout section can reciprocally slide between the fixed grate bar groups in the burnout section. Driven by this relative movement between the sliding grate bar groups and the fixed grate bar groups in the burnout section, the burned waste is driven to move forward step by step on the stepped structure formed by the fixed grate bar groups and the sliding grate bar groups in the burnout section.

[0066] Compared with the prior art, the beneficial effects of the present invention are reflected in the following aspects:

[0067] 1. The structure of the present invention is reasonably designed, with an efficient air distribution structure, which improves the air distribution effect of the combustion-supporting air. Double long-strip air holes are provided at the top of each grate bar. Combined with the design of the front windshield, the air flow is guided into the bottom of the waste, realizing uniform air distribution and front penetration of the primary air, improving the uniformity and sufficiency of waste combustion, and enhancing the combustion efficiency;

[0068] 2. The present invention is convenient to operate and has an enhanced heat dissipation design. A plurality of heat dissipation rib plates are arranged on the lower side of each grate bar, and heat is released through passive ventilation, which can effectively relieve the thermal fatigue problem of the grate bars, reduce the temperature rise, and extend the service life of the grate bars;

[0069] 3. The grate bar groups of the present invention have a more stable connection structure. The adjacent grate bars are connected in a pin shaft connection form, effectively preventing single-piece warping, and thus maintaining the flatness and stability of the entire row of grate bars;

[0070] 4. A combination of a restraint pull rod and a disc spring is provided in the grate bar groups of the present invention, effectively restraining the grate bars to be closely attached together, avoiding excessive ash from flowing out through the gaps between the grate bars. The deformation of the disc spring can buffer the thermal expansion deformation, ensuring that the grate bars can always be closely attached together for operation, and ensuring the stability in a high-temperature operating environment. Description of the Drawings

[0071] Figure 1 is the front view of the present invention;

[0072] Figure 2 is the structural schematic diagram of the grate structure in the drying section of the present invention;

[0073] Figure 3 is the bottom view of the fixed row of plates group in the drying section of the present invention;

[0074] Figure 4 is the structural schematic diagram of the fixed grate plate in the drying section of the present invention;

[0075] Figure 5 is the three - dimensional structural schematic diagram of the fixed grate plate in the drying section of the present invention;

[0076] Figure 6 is the bottom view of the first disc spring of the present invention;

[0077] Figure 7 is the bottom view of the sliding row of plates group in the drying section of the present invention;

[0078] Figure 8 is the structural schematic diagram of the sliding grate plate in the drying section of the present invention;

[0079] Figure 9 is the three - dimensional structural schematic diagram of the sliding grate plate in the drying section of the present invention;

[0080] Figure 10 is the bottom view of the second disc spring of the present invention;

[0081] Figure 11 is the structural schematic diagram of the grate structure in the combustion section of the present invention;

[0082] Figure 12 is the bottom view of the fixed row of plates group in the combustion section of the present invention;

[0083] Figure 13 is the structural schematic diagram of the fixed grate plate in the combustion section of the present invention;

[0084] Figure 14 is the three - dimensional structural schematic diagram of the fixed grate plate in the combustion section of the present invention;

[0085] Figure 15 is the bottom view of the third disc spring of the present invention;

[0086] Figure 16 is the bottom view of the sliding row of plates group in the combustion section of the present invention;

[0087] Figure 17 is the structural schematic diagram of the sliding grate plate in the combustion section of the present invention;

[0088] Figure 18It is a three-dimensional structure schematic diagram of the sliding grate bar in the combustion section of the present invention;

[0089] Figure 19 It is a bottom view of the fourth disc spring of the present invention;

[0090] Figure 20 It is a structure schematic diagram of the grate structure in the burnout section of the present invention

[0091] Figure 21 It is a bottom view of the fixed grate bar group in the burnout section of the present invention;

[0092] Figure 22 It is a structure schematic diagram of the fixed grate bar in the burnout section of the present invention;

[0093] Figure 23 It is a three-dimensional structure schematic diagram of the fixed grate bar in the burnout section of the present invention;

[0094] Figure 24 It is a bottom view of the fifth disc spring of the present invention;

[0095] Figure 25 It is a bottom view of the sliding grate bar group in the burnout section of the present invention;

[0096] Figure 26 It is a structure schematic diagram of the sliding grate bar in the burnout section of the present invention;

[0097] Figure 27 It is a three-dimensional structure schematic diagram of the sliding grate bar in the burnout section of the present invention;

[0098] Figure 28 It is a bottom view of the sixth disc spring of the present invention;

[0099] Figure 29 It is a structure schematic diagram of the heat dissipation and heat conduction plate of the present invention;

[0100] Figure 30 It is a structure schematic diagram of the heat dissipation and exhaust shell of the present invention.

[0101] In the figure, 10 - drying section grate structure, 11 - drying section grate support frame, 12 - drying section fixed row of grate plates, 120 - drying section fixed grate plate, 1201 - first fixed connection groove, 1202 - first structure accommodating groove, 1203 - first heat dissipation rib plate, 1204 - first restraint tie rod fixing hole, 121 - first main ventilation hole, 122 - first auxiliary ventilation hole, 123 - first pin shaft connection hole, 1230 - first restraint pin shaft, 124 - first restraint tie rod of grate plate, 125 - first disc spring, 126 - first wind baffle, 13 - drying section sliding row of grate plates, 130 - drying section sliding grate plate, 1301 - second fixed connection groove, 1302 - second structure accommodating groove, 1303 - second heat dissipation rib plate, 1304 - second restraint tie rod fixing hole, 1305 - first clamping restraint plate, 131 - second main ventilation hole, 132 - second auxiliary ventilation hole, 133 - second pin shaft connection hole, 1330 - second restraint pin shaft, 134 - second restraint tie rod of grate plate, 135 - second disc spring, 136 - second wind baffle, 14 - drying section grate plate drive mechanism, 141 - first drive support frame, 142 - first hydraulic drive rod, 143 - first linkage drive frame, 144 - first grate plate connection shaft, 20 - combustion section grate structure, 21 - combustion section grate support frame, 22 - combustion section fixed row of grate plates, 220 - combustion section fixed grate plate, 2201 - third fixed connection groove, 2202 - third structure accommodating groove, 2203 - third heat dissipation rib plate, 2204 - third restraint tie rod fixing hole, 221 - third main ventilation hole, 222 - third auxiliary ventilation hole, 223 - third pin shaft connection hole, 2230 - third restraint pin shaft, 224 - third restraint tie rod of grate plate, 225 - third disc spring, 226 - third wind baffle, 23 - combustion section sliding row of grate plates, 230 - combustion section sliding grate plate, 2301 - fourth fixed connection groove, 2302 - fourth structure accommodating groove, 2303 - fourth heat dissipation rib plate, 2304 - fourth restraint tie rod fixing hole, 2305 - second clamping restraint plate, 231 - fourth main ventilation hole, 232 - fourth auxiliary ventilation hole, 233 - fourth pin shaft connection hole, 2330 - fourth restraint pin shaft, 234 - fourth restraint tie rod of grate plate, 235 - fourth disc spring, 236 - fourth wind baffle, 24 - combustion section grate plate drive mechanism, 241 - second drive support frame, 242 - second hydraulic drive rod, 243 - second linkage drive frame, 244 - second grate plate connection shaft, 30 - burnout section grate structure, 31 - burnout section grate support frame, 32 - burnout section fixed row of grate plates, 320 - burnout section fixed grate plate, 3201 - fifth fixed connection groove, 3202 - fifth structure accommodating groove, 3203 - fifth heat dissipation rib plate, 3204 - fifth restraint tie rod fixing hole, 321 - fifth pin shaft connection hole, 3210 - fifth restraint pin shaft, 322 - fifth restraint tie rod of grate plate, 323 - fifth disc spring,33 - Burned - out section sliding row - piece group, 330 - Burned - out section sliding grate piece, 3301 - Sixth fixed connection groove, 3302 - Sixth structure accommodation groove, 3303 - Sixth heat - dissipation rib plate, 3304 - Sixth restraint tie - rod fixing hole, 3305 - Third clamping restraint plate, 331 - Sixth pin - shaft connection hole, 332 - Sixth restraint tie - rod of the grate piece, 333 - Sixth disc - spring, 34 - Drive mechanism for the burned - out section grate piece, 341 - Third drive support frame, 342 - Third hydraulic drive rod, 343 - Third linkage drive frame, 344 - Third grate - piece connection shaft, 351 - Heat - dissipation and heat - conduction plate, 352 - Heat pipe, 353 - Heat - conduction and ventilation pipe shell, 354 - Heat - dissipation exhaust shell, 355 - Heat - dissipation exhaust hole. Detailed implementation mode

[0102] The following combines Figures 1 to 30 to describe the present invention in detail. For the convenience of narration, the orientation described below is stipulated as follows: The up - down, left - right, front - back directions mentioned below are consistent with the up - down, left - right, front - back directions of the projection relationship of each main view or structure schematic diagram itself.

[0103] Embodiment 1:

[0104] A lightweight nickel - free grate structure, as Figure 1 shown, includes a drying - section grate structure 10, a combustion - section grate structure 20, and a burned - out section grate structure 30 arranged in sequence from the input end to the output end and disposed in the waste incinerator;

[0105] As Figure 2 shown, the drying - section grate structure 10 includes a drying - section grate support frame 11 fixed on the inner side wall of the waste incinerator. A plurality of parallel - arranged drying - section fixed row - piece groups 12 are fixed on the drying - section grate support frame 11, and a drying - section sliding row - piece group 13 is slidably connected between two adjacent drying - section fixed row - piece groups 12;

[0106] As Figure 11 shown, the combustion - section grate structure 20 includes a combustion - section grate support frame 21 fixed on the inner side wall of the waste incinerator. A plurality of parallel - arranged combustion - section fixed row - piece groups 22 are fixed on the combustion - section grate support frame 21, and a combustion - section sliding row - piece group 23 is slidably connected between two adjacent combustion - section fixed row - piece groups 22;

[0107] As Figure 20 shown, the burned - out section grate structure 30 includes a burned - out section grate support frame 31 fixed on the inner side wall of the waste incinerator. A plurality of parallel - arranged burned - out section fixed row - piece groups 32 are fixed on the burned - out section grate support frame 31, and a burned - out section sliding row - piece group 33 is slidably connected between two adjacent burned - out section fixed row - piece groups 32.

[0108] Embodiment 2:

[0109] On the basis of Embodiment 1, as Figure 3 shown, the fixed row of drying section plates 12 is formed by juxtaposing a plurality of fixed drying section grate plates 120, as Figure 4 , Figure 5 shown, the bottom of the fixed drying section grate plate 120 has a first fixed connection groove 1201 and a first structure receiving groove 1202 with openings facing downwards. The upper side of the fixed drying section grate plate 120 has a first main ventilation hole 121 that penetrates up and down, and the side of the fixed drying section grate plate 120 has a first auxiliary ventilation hole 122;

[0110] The first structure receiving groove 1202 has a plurality of first heat dissipation rib plates 1203 arranged in parallel;

[0111] Adjacent sides of each fixed drying section grate plate 120 have a first pin connection hole 123, and a first restraint pin 1230 is commonly connected in the first pin connection holes 123 on adjacent sides of two adjacent fixed drying section grate plates 120;

[0112] The fixed drying section grate plate 120 has a first restraint tie rod fixing hole 1204 that penetrates along the juxtaposed arrangement direction, and a first grate plate restraint tie rod 124 is commonly inserted through the first restraint tie rod fixing holes 1204 of a plurality of fixed drying section grate plates 120;

[0113] As Figure 6 shown, a first end restraint nut 1240 is threadedly fixed at the end of the first grate plate restraint tie rod 124, and a plurality of first disc springs 125 are provided in a pressing manner between the first end restraint nut 1240 and an adjacent fixed drying section grate plate 120;

[0114] As Figure 4 shown, a first wind deflector 126 is fixed in the first structure receiving groove 1202 at the position of the first main ventilation hole 121.

[0115] As Figure 7 shown, the sliding row of drying section plates 13 is formed by juxtaposing a plurality of sliding drying section grate plates 130, as Figure 8 , Figure 9 shown, the bottom of the sliding drying section grate plate 130 has a second fixed connection groove 1301 and a second structure receiving groove 1302 with openings facing downwards. The upper side of the sliding drying section grate plate 130 has a second main ventilation hole 131 that penetrates up and down, and the side of the sliding drying section grate plate 130 has a second auxiliary ventilation hole 132;

[0116] The second structure receiving groove 1302 has a plurality of second heat dissipation rib plates 1303 arranged in parallel;

[0117] The adjacent sides of the sliding grate bars 130 in each drying section have second pin connection holes 133, and a second restraint pin 1330 is commonly connected in the second pin connection holes 133 on the adjacent sides of two adjacent sliding grate bars 130 in the drying section;

[0118] The sliding grate bars 130 in the drying section have second restraint tie rod fixing holes 1304 that penetrate along the parallel arrangement direction, and a grate bar second restraint tie rod 134 is commonly inserted through the second restraint tie rod fixing holes 1304 of multiple sliding grate bars 130 in the drying section;

[0119] As Figure 10 shown, a second end restraint nut 1340 is fixed by threading at the end of the grate bar second restraint tie rod 134, and multiple second disc springs 135 are provided in a pressing manner between the second end restraint nut 1340 and an adjacent sliding grate bar 130 in the drying section;

[0120] As Figure 8 shown, a second wind deflector 136 is fixed at the second main ventilation hole 131 in the second structure accommodation groove 1302.

[0121] As Figure 2 shown, a drying section grate structure driving mechanism 14 is provided below the drying section grate structure 10. The drying section grate structure driving mechanism 14 includes a first driving support frame 141 fixed on the inner side wall of the waste incinerator. Multiple first hydraulic driving rods 142 are fixed on the first driving support frame 141. The inner rod ends of the first hydraulic driving rods 142 are commonly connected to a first linkage driving frame 143. Multiple parallel first grate bar connection shafts 144 are fixed on the top of the first linkage driving frame 143, and the first grate bar connection shafts 144 are respectively and correspondingly clamped in the second fixed connection grooves 1301 of each sliding grate bar group 13 in the drying section;

[0122] The first hydraulic driving rod 142 is a hydraulic driving rod with a travel switch in the prior art;

[0123] As Figure 8 shown, a first clamping restraint plate 1305 is fixed at the second fixed connection groove 1301 on the lower side of the sliding grate bar 130 in the drying section, and the first clamping restraint plate 1305 presses and restrains the outer side surface of the first grate bar connection shaft 144.

[0124] Example 3:

[0125] On the basis of Example 2, as Figure 12 shown, the combustion section fixed grate bar group 22 is formed by juxtaposing multiple combustion section fixed grate bars 220, as Figure 13 、 Figure 14As shown, the bottom of the combustion section fixed grate plate 220 has a third fixed connection groove 2201 and a third structure accommodating groove 2202 with openings facing downward, the upper side of the combustion section fixed grate plate 220 has a third main ventilation hole 221 that passes through from top to bottom, and the side of the combustion section fixed grate plate 220 has a third auxiliary ventilation hole 222;

[0126] The third structure accommodating groove 2202 has a plurality of third heat dissipation ribs 2203 arranged in parallel;

[0127] The adjacent side surfaces of the fixed grate plates 220 of each combustion section are provided with third pin shaft connection holes 223, and the third pin shaft connection holes 223 of the adjacent side surfaces of two adjacent fixed grate plates 220 of the combustion section are commonly connected with a third restraining pin shaft 2230;

[0128] The combustion section fixed grate plate 220 has a third restraining rod fixing hole 2204 that penetrates along the parallel arrangement direction, and a grate plate third restraining rod 224 is commonly penetrated through the third restraining rod fixing holes 2204 of multiple combustion section fixed grate plates 220;

[0129] like Figure 15 As shown, a third end restraining nut 2240 is threadedly fixed to the end of the third restraining rod 224 of the grate plate, and a plurality of third butterfly springs 225 are pressed between the third end restraining nut 2240 and an adjacent combustion section fixed grate plate 220;

[0130] like Figure 13 As shown, a third wind shielding plate 226 is fixed in the third structure accommodating groove 2202 at the third main ventilation hole 221 .

[0131] like Figure 16 As shown, the combustion section sliding grate group 23 is composed of a plurality of combustion section sliding grate slices 230 arranged in parallel. Figure 17 , Figure 18 As shown, the bottom of the combustion section sliding grate plate 230 has a fourth fixed connection groove 2301 and a fourth structure accommodating groove 2302 with openings facing downward, the upper side of the combustion section sliding grate plate 230 has a fourth main ventilation hole 231 that passes through from top to bottom, and the side of the combustion section sliding grate plate 230 has a fourth auxiliary ventilation hole 232;

[0132] The fourth structure accommodating groove 2302 has a plurality of fourth heat dissipation ribs 2303 arranged in parallel;

[0133] The adjacent side surfaces of the combustion section sliding grate plates 230 are provided with fourth pin connection holes 233, and the fourth pin connection holes 233 of the adjacent side surfaces of two adjacent combustion section sliding grate plates 230 are commonly connected with a fourth restraining pin 2330;

[0134] The combustion section sliding grate bar 230 is provided with a fourth restraint pull rod fixing hole 2304 penetrating along the parallel arrangement direction. A grate bar fourth restraint pull rod 234 is commonly inserted through the fourth restraint pull rod fixing holes 2304 of multiple combustion section sliding grate bars 230;

[0135] As Figure 19 shown, a fourth end restraint nut 2340 is fixed to the end of the grate bar fourth restraint pull rod 234 by threading. A plurality of fourth disc springs 235 are provided in a pressing manner between the fourth end restraint nut 2340 and an adjacent combustion section sliding grate bar 230;

[0136] As Figure 17 shown, a fourth wind deflector 236 is fixed at the fourth main ventilation hole 231 within the fourth structure accommodation groove 2302.

[0137] As Figure 11 shown, a combustion section grate structure driving mechanism 24 is provided below the combustion section grate structure 20. The combustion section grate structure driving mechanism 24 includes a second driving support frame 241 fixed to the inner side wall of the waste incinerator. A plurality of second hydraulic driving rods 242 are fixed to the second driving support frame 241. The inner rod ends of the second hydraulic driving rods 242 are commonly connected to a second linkage driving frame 243. A plurality of second grate bar connecting shafts 244 arranged in parallel are fixed to the top of the second linkage driving frame 243. The second grate bar connecting shafts 244 are respectively clamped in the fourth fixed connection grooves 2301 of each combustion section sliding grate bar group 23;

[0138] The second hydraulic driving rod 242 is a hydraulic driving rod with a travel switch in the prior art;

[0139] A second clamping restraint plate 2305 is fixed to the lower side of the combustion section sliding grate bar 230 at the fourth fixed connection groove 2301. The second clamping restraint plate 2305 presses and restrains the outer side surface of the second grate bar connecting shaft 244.

[0140] Example 4:

[0141] On the basis of Example 3, as Figure 21 shown, the burnout section fixed grate bar group 32 is formed by juxtaposing a plurality of burnout section fixed grate bars 320. As Figure 22 、 Figure 23 shown, the bottom of the burnout section fixed grate bar 320 has a fifth fixed connection groove 3201 and a fifth structure accommodation groove 3202 with an opening facing downwards,

[0142] A plurality of fifth heat dissipation rib plates 3203 are provided in the fifth structure accommodation groove 3202;

[0143] The adjacent sides of the fixed grate bars 320 in the burnout section have fifth pin connection holes 321, and a fifth restraint pin 3210 is commonly connected in the fifth pin connection holes 321 on the adjacent sides of two adjacent fixed grate bars 320 in the burnout section;

[0144] The fixed grate bars 320 in the burnout section have fifth restraint tie rod fixing holes 3204 that penetrate along the side-by-side arrangement direction, and a grate bar fifth restraint tie rod 322 is commonly inserted through the fifth restraint tie rod fixing holes 3204 of multiple fixed grate bars 320 in the burnout section;

[0145] As Figure 24 shown, a fifth end restraint nut 3220 is threadedly fixed to the end of the grate bar fifth restraint tie rod 322, and multiple fifth disc springs 323 are press-fitted between the fifth end restraint nut 3220 and an adjacent fixed grate bar 320 in the burnout section.

[0146] As Figure 25 shown, the burnout section sliding grate bar group 33 is formed by combining multiple burnout section sliding grate bars 330 side by side. As Figure 26 、 Figure 27 shown, the bottom of the burnout section sliding grate bar 330 has a sixth fixed connection groove 3301 and a sixth structure receiving groove 3302 with openings facing downward.

[0147] The sixth structure receiving groove 3302 has multiple parallel sixth heat dissipation rib plates 3303;

[0148] The adjacent sides of the burnout section sliding grate bars 330 have sixth pin connection holes 331, and a sixth restraint pin 3310 is commonly connected in the sixth pin connection holes 331 on the adjacent sides of two adjacent burnout section sliding grate bars 330;

[0149] The burnout section sliding grate bars 330 have sixth restraint tie rod fixing holes 3304 that penetrate along the side-by-side arrangement direction, and a grate bar sixth restraint tie rod 332 is commonly inserted through the sixth restraint tie rod fixing holes 3304 of multiple burnout section sliding grate bars 330;

[0150] As Figure 28 shown, a sixth end restraint nut 3320 is threadedly fixed to the end of the grate bar sixth restraint tie rod 332, and multiple sixth disc springs 333 are press-fitted between the sixth end restraint nut 3320 and an adjacent burnout section sliding grate bar 330.

[0151] As Figure 20As shown in the figure, a driving mechanism 34 for the grate sheets in the burnout section is provided below the grate structure 30 in the burnout section. The driving mechanism 34 for the grate sheets in the burnout section includes a third driving support frame 341 fixed on the inner side wall of the waste incinerator. A plurality of third hydraulic driving rods 342 are fixed on the third driving support frame 341. The inner rod ends of the third hydraulic driving rods 342 are jointly connected to a third linkage driving frame 343. A plurality of parallelly arranged third grate sheet connecting shafts 344 are fixed on the top of the third linkage driving frame 343. The third grate sheet connecting shafts 344 are respectively clamped in the sixth fixed connection grooves 3301 of the respective slip grate sheet groups 33 in the burnout section;

[0152] The third hydraulic driving rod 342 is a hydraulic driving rod with a travel switch in the prior art;

[0153] A third clamping restraint plate 3305 is fixed at the lower side of the combustion section slip grate sheet 230 at the position of the fourth fixed connection groove 2301. The third clamping restraint plate 3305 presses and restrains on the outer side surface of the third grate sheet connecting shaft 344.

[0154] Embodiment 5:

[0155] On the basis of Embodiment 4, as Figure 29 shown in the figure, a heat dissipation and heat conduction plate 351 is fixed on the lower side surface of the fixed grate sheet 320 in the burnout section. A plurality of heat pipes 352 are fixed on the heat dissipation and heat conduction plate 351. A heat conduction ventilation pipe shell 353 is provided to surround one end of the plurality of heat pipes 352 away from the heat dissipation and heat conduction plate 351;

[0156] The heat pipe 352 is a sodium heat pipe in the prior art;

[0157] A plurality of heat dissipation fins 3520 are fixed at one end of the heat pipe 352 located inside the heat conduction ventilation pipe shell 353;

[0158] As Figure 30 shown in the figure, the heat conduction ventilation pipe shell 353 is connected to a heat dissipation exhaust shell 354 through a pipeline. The top of the heat dissipation exhaust shell 354 has a plurality of heat dissipation exhaust holes 355 communicating with its interior;

[0159] The heat dissipation exhaust shell 354 is arranged below the drying section grate structure 10.

[0160] In the actual application process of the present invention, the waste to be incinerated enters from the input end of the waste incinerator. The waste to be incinerated first undergoes a drying process through the drying section grate structure 10 to remove most of the moisture, and then undergoes sufficient combustion through the combustion section grate structure 20. After the waste to be incinerated burns, waste ashes are formed. The waste ashes finally are discharged from the output end of the waste incinerator through the burnout section grate structure 30;

[0161] In the grate structure 10 of the drying section, the fixed row of grate plates 12 in the drying section and the sliding row of grate plates 13 in the drying section together form a stepped support structure, enabling the waste to be incinerated to be positioned on top of the fixed row of grate plates 12 in the drying section and the sliding row of grate plates 13 in the drying section. Driven by the grate plate driving mechanism 14 in the drying section, the waste to be incinerated gradually moves towards the grate structure 20 of the combustion section;

[0162] The inner rod of the first hydraulic driving rod 142 can perform reciprocating motions of extending and retracting. The extension and retraction of the inner rod of the first hydraulic driving rod 142 drive the first linkage driving frame 143 and multiple first grate plate connecting shafts 144, along with the sliding row of grate plates 13 in the drying section, to perform reciprocating motions, causing the sliding row of grate plates 13 in the drying section to slide reciprocally between the fixed row of grate plates 12 in the drying section. Driven by this relative motion between the sliding row of grate plates 13 in the drying section and the fixed row of grate plates 12 in the drying section, the waste to be incinerated then moves step by step along the stepped structure formed by the fixed row of grate plates 12 in the drying section and the sliding row of grate plates 13 in the drying section;

[0163] Meanwhile, there is a blast mechanism of the prior art below the grate structure 10 in the drying section, which drives the air to flow from bottom to top, enabling the air to pass through the first main ventilation holes 121, the first auxiliary ventilation holes 122 on the fixed grate plates 120 in the drying section, as well as the second main ventilation holes 131 and the second auxiliary ventilation holes 132 on the sliding grate plates 130 in the drying section, and drying the waste to be incinerated with the air flowing from bottom to top;

[0164] The dried waste then enters the grate structure 20 of the combustion section;

[0165] In the grate structure 20 of the combustion section, the fixed row of grate plates 22 in the combustion section and the sliding row of grate plates 23 in the combustion section together form a stepped support structure, enabling the waste to be incinerated to be supported on top of the fixed row of grate plates 22 in the combustion section and the sliding row of grate plates 23 in the combustion section. Driven by the grate plate driving mechanism 24 in the combustion section, the waste to be incinerated gradually moves towards the grate structure 30 of the burnout section. During this process, the waste to be incinerated will burn sufficiently on the grate structure 20 of the combustion section until it is burned into ashes;

[0166] The inner rod of the second hydraulic driving rod 242 can perform reciprocating motions of extending and retracting. The extension and retraction of the inner rod of the second hydraulic driving rod 242 drive the second linkage driving frame 243 and multiple second grate plate connecting shafts 244, along with the sliding row of grate plates 23 in the combustion section, to perform reciprocating motions, causing the sliding row of grate plates 23 in the combustion section to slide reciprocally between the fixed row of grate plates 22 in the combustion section. Driven by this relative motion between the sliding row of grate plates 23 in the combustion section and the fixed row of grate plates 22 in the combustion section, the waste during the incineration process then moves step by step along the stepped structure formed by the fixed row of grate plates 22 in the combustion section and the sliding row of grate plates 23 in the combustion section;

[0167] Below the grate structure 20 of the combustion section, there is a blast mechanism of the prior art. During the garbage incineration process, it drives the air to flow from bottom to top, so that the air passes through the third main ventilation holes 221, the third auxiliary ventilation holes 222 on the fixed grate plates 220 of the combustion section, the fourth main ventilation holes 231, and the fourth auxiliary ventilation holes 232 on the sliding grate plates 230 of the combustion section. The air flowing from bottom to top continuously mixes with the garbage during the incineration process, providing sufficient oxygen for the garbage incineration process and enabling the garbage to be fully burned out;

[0168] The incinerated garbage forms burned-out garbage and enters the grate structure 30 of the burnout section;

[0169] In the grate structure 30 of the burnout section, the fixed row of grate plates group 32 and the sliding row of grate plates group 33 of the burnout section together form a stepped support structure, so that the burned-out garbage is supported on the tops of the fixed row of grate plates group 32 and the sliding row of grate plates group 33 of the burnout section. The burned-out garbage is driven by the grate plate driving mechanism 34 of the burnout section and gradually moves towards the output end of the garbage incinerator. Finally, the burned-out garbage is discharged from the output end of the garbage incinerator;

[0170] The inner rod of the third hydraulic drive rod 342 can perform reciprocating motions of extending and retracting. The extension and retraction of the inner rod of the third hydraulic drive rod 342 drive the third linkage drive frame 343 and multiple third grate plate connecting shafts 344 together with the sliding row of grate plates group 33 of the burnout section to perform reciprocating motions, so that the sliding row of grate plates group 33 of the burnout section slides reciprocally between the fixed row of grate plates group 32 of the burnout section. Driven by this relative motion between the sliding row of grate plates group 33 of the burnout section and the fixed row of grate plates group 32 of the burnout section, the burned-out garbage is gradually moved forward step by step on the stepped structure formed by the fixed row of grate plates group 32 and the sliding row of grate plates group 33 of the burnout section;

[0171] The heat in the burned-out garbage is conducted to the grate structure 10 of the drying section, so that the garbage to be incinerated at the grate structure 10 of the drying section is quickly dried. The heat in the burned-out garbage is conducted through the fixed grate plates 320 of the burnout section, the heat dissipation and heat conduction plate 351, and the heat pipe 352, so that the heat in the burned-out garbage is conducted to one end of the heat pipe 352 located inside the heat conduction ventilation pipe shell 353. Using a blower of the prior art, air is continuously input into the heat conduction ventilation pipe shell 353, and the heat conducted to the heat pipe 352 is used to heat the air to form hot air. Then the hot air flows through the pipeline into the heat dissipation exhaust shell 354, and the hot air in the heat dissipation exhaust shell 354 is discharged through multiple heat dissipation exhaust holes 355. The hot air, together with the air flowing from bottom to top, passes through the first main ventilation holes 121, the first auxiliary ventilation holes 122 on the fixed grate plates 120 of the drying section, and the second main ventilation holes 131, the second auxiliary ventilation holes 132 on the sliding grate plates 130 of the drying section, and the hot air is used to quickly dry the garbage to be incinerated.

Claims

1. A lightweight nickel-free grate structure, characterized in that, It includes a drying section grate structure (10), a combustion section grate structure (20), and an afterburning section grate structure (30) which are arranged in the waste incinerator along the input end to the output end; The drying section grate structure (10) includes a drying section grate support frame (11) fixed on the inner side wall of the waste incinerator. A plurality of parallel drying section fixed row of plates groups (12) are fixed on the drying section grate support frame (11). A drying section sliding row of plates group (13) is slidably connected between two adjacent drying section fixed row of plates groups (12); The combustion section grate structure (20) includes a combustion section grate support frame (21) fixed on the inner side wall of the waste incinerator. A plurality of parallel combustion section fixed row of plates groups (22) are fixed on the combustion section grate support frame (21). A combustion section sliding row of plates group (23) is slidably connected between two adjacent combustion section fixed row of plates groups (22); The afterburning section grate structure (30) includes an afterburning section grate support frame (31) fixed on the inner side wall of the waste incinerator. A plurality of parallel afterburning section fixed row of plates groups (32) are fixed on the afterburning section grate support frame (31). An afterburning section sliding row of plates group (33) is slidably connected between two adjacent afterburning section fixed row of plates groups (32).

2. The lightweight nickel-free grate structure according to claim 1, characterized in that, The drying section fixed row of plates group (12) is formed by combining a plurality of drying section fixed grate plates (120) in parallel. The bottom of the drying section fixed grate plate (120) has a first fixed connection groove (1201) and a first structure accommodating groove (1202) with an opening facing downwards. The upper side of the drying section fixed grate plate (120) has a first main ventilation hole (121) penetrating up and down. The side of the drying section fixed grate plate (120) has a first auxiliary ventilation hole (122); A plurality of parallel first heat dissipation rib plates (1203) are arranged in the first structure accommodating groove (1202); Adjacent sides of each drying section fixed grate plate (120) have a first pin shaft connection hole (123). A first restraint pin shaft (1230) is commonly connected in the first pin shaft connection holes (123) on the adjacent sides of two adjacent drying section fixed grate plates (120); The drying section fixed grate plate (120) has a first restraint pull rod fixing hole (1204) penetrating along the parallel arrangement direction. A grate plate first restraint pull rod (124) is commonly penetrated in the first restraint pull rod fixing holes (1204) of a plurality of drying section fixed grate plates (120); The end of the grate plate first restraint pull rod (124) is threadedly fixed with a first end restraint nut (1240). A plurality of first disc springs (125) are arranged in a pressing manner between the first end restraint nut (1240) and an adjacent drying section fixed grate plate (120); A first wind baffle (126) is fixed at the position of the first main ventilation hole (121) in the first structure accommodating groove (1202).

3. A lightweight nickel-free grate structure according to claim 1, characterized in that, The sliding grate sheet group (13) in the drying section is composed of a plurality of sliding grate sheets (130) in the drying section arranged in parallel. The bottom of the sliding grate sheet (130) in the drying section has a second fixed connection groove (1301) and a second structure accommodating groove (1302) with openings facing downwards. The upper side of the sliding grate sheet (130) in the drying section has a second main ventilation hole (131) penetrating up and down, and the side of the sliding grate sheet (130) in the drying section has a second auxiliary ventilation hole (132). There are a plurality of second heat dissipation rib plates (1303) arranged in parallel in the second structure accommodating groove (1302). Adjacent sides of each sliding grate sheet (130) in the drying section have second pin shaft connection holes (133), and a second restraint pin shaft (1330) is commonly connected in the second pin shaft connection holes (133) on the adjacent sides of two adjacent sliding grate sheets (130) in the drying section. The sliding grate sheet (130) in the drying section has a second restraint pull rod fixing hole (1304) penetrating along the parallel arrangement direction. A grate sheet second restraint pull rod (134) is commonly inserted into the second restraint pull rod fixing holes (1304) of a plurality of sliding grate sheets (130) in the drying section. The end of the grate sheet second restraint pull rod (134) is fixed with a second end restraint nut (1340), and a plurality of second disc springs (135) are arranged in a pressing manner between the second end restraint nut (1340) and an adjacent sliding grate sheet (130) in the drying section. A second wind baffle (136) is fixed at the position of the second main ventilation hole (131) in the second structure accommodating groove (1302).

4. A lightweight nickel-free grate structure according to claim 3, characterized in that, A driving mechanism (14) for the sliding grate sheet in the drying section is arranged below the grate structure (10) in the drying section. The driving mechanism (14) for the sliding grate sheet in the drying section includes a first driving support frame (141) fixed on the inner side wall of the waste incinerator. A plurality of first hydraulic driving rods (142) are fixed on the first driving support frame (141). The inner rod ends of the first hydraulic driving rods (142) are commonly connected to a first linkage driving frame (143). A plurality of parallel first grate sheet connection shafts (144) are fixed on the top of the first linkage driving frame (143). The first grate sheet connection shafts (144) are respectively clamped in the second fixed connection grooves (1301) of each sliding grate sheet group (13) in the drying section. A first clamping restraint plate (1305) is fixed at the position of the second fixed connection groove (1301) on the lower side of the sliding grate sheet (130) in the drying section. The first clamping restraint plate (1305) presses and restrains the outer side surface of the first grate sheet connection shaft (144).

5. The lightweight nickel-free grate structure according to claim 1, wherein, The fixed row of grate bars in the combustion section (22) is formed by juxtaposing a plurality of fixed grate bars in the combustion section (220). The bottom of the fixed grate bar in the combustion section (220) has a third fixed connection groove (2201) and a third structure receiving groove (2202) with openings facing downwards. The upper side of the fixed grate bar in the combustion section (220) has a third main ventilation hole (221) that penetrates vertically. The side of the fixed grate bar in the combustion section (220) has a third auxiliary ventilation hole (222). A plurality of parallel third heat dissipation rib plates (2203) are provided in the third structure receiving groove (2202). Adjacent sides of each of the fixed grate bars in the combustion section (220) have third pin connection holes (223). A third restraint pin (2230) is commonly connected in the third pin connection holes (223) on the adjacent sides of two adjacent fixed grate bars in the combustion section (220). The fixed grate bar in the combustion section (220) has a third restraint tie rod fixing hole (2204) that penetrates along the juxtaposed arrangement direction. A grate bar third restraint tie rod (224) is commonly passed through the third restraint tie rod fixing holes (2204) of the plurality of fixed grate bars in the combustion section (220). A third end restraint nut (2240) is threadedly fixed at the end of the grate bar third restraint tie rod (224). A plurality of third disc springs (225) are provided in a pressing manner between the third end restraint nut (2240) and an adjacent fixed grate bar in the combustion section (220). A third wind baffle (226) is fixed at the position of the third main ventilation hole (221) in the third structure receiving groove (2202).

6. The lightweight nickel-free grate structure according to claim 1, characterized in that, The sliding row of grate bars in the combustion section (23) is formed by juxtaposing a plurality of sliding grate bars in the combustion section (230). The bottom of the sliding grate bar in the combustion section (230) has a fourth fixed connection groove (2301) and a fourth structure receiving groove (2302) with openings facing downwards. The upper side of the sliding grate bar in the combustion section (230) has a fourth main ventilation hole (231) that penetrates vertically. The side of the sliding grate bar in the combustion section (230) has a fourth auxiliary ventilation hole (232). A plurality of parallel fourth heat dissipation rib plates (2303) are provided in the fourth structure receiving groove (2302). Adjacent sides of each of the sliding grate bars in the combustion section (230) have fourth pin connection holes (233). A fourth restraint pin (2330) is commonly connected in the fourth pin connection holes (233) on the adjacent sides of two adjacent sliding grate bars in the combustion section (230). The sliding grate bar in the combustion section (230) has a fourth restraint tie rod fixing hole (2304) that penetrates along the juxtaposed arrangement direction. A grate bar fourth restraint tie rod (234) is commonly passed through the fourth restraint tie rod fixing holes (2304) of the plurality of sliding grate bars in the combustion section (230). The end of the fourth restraint pull rod (234) of the grate bar is fixed with a fourth end restraint nut (2340), and a plurality of fourth disc springs (235) are provided in a pressing manner between the fourth end restraint nut (2340) and an adjacent sliding grate bar (230) of the combustion section; A fourth wind baffle (236) is fixed at the fourth main ventilation hole (231) in the fourth structure accommodating groove (2302).

7. A lightweight nickel-free grate structure according to claim 6, characterized in that, A driving mechanism for the grate bars in the combustion section (24) is provided below the grate structure (20) in the combustion section. The driving mechanism for the grate bars in the combustion section (24) includes a second driving support frame (241) fixed on the inner side wall of the waste incinerator. A plurality of second hydraulic driving rods (242) are fixed on the second driving support frame (241). The inner rod ends of the second hydraulic driving rods (242) are jointly connected with a second linkage driving frame (243). A plurality of second grate bar connecting shafts (244) arranged in parallel are fixed on the top of the second linkage driving frame (243). The second grate bar connecting shafts (244) are respectively clamped in the fourth fixed connection grooves (2301) of each sliding grate bar group (23) in the combustion section; A second clamping restraint plate (2305) is fixed at the lower side of the sliding grate bar (230) in the combustion section at the fourth fixed connection groove (2301), and the second clamping restraint plate (2305) presses and restrains on the outer side surface of the second grate bar connecting shaft (244).

8. A lightweight nickel-free grate structure according to claim 1, characterized in that, The fixed grate bar group (32) in the burnout section is formed by juxtaposing a plurality of fixed grate bars (320) in the burnout section. The bottom of the fixed grate bar (320) in the burnout section has a fifth fixed connection groove (3201) and a fifth structure accommodating groove (3202) with openings facing downwards. A plurality of fifth heat dissipation rib plates (3203) are arranged in parallel in the fifth structure accommodating groove (3202); The adjacent side surfaces of the fixed grate bar (320) in the burnout section have fifth pin shaft connection holes (321), and a fifth restraint pin shaft (3210) is jointly connected in the fifth pin shaft connection holes (321) on the adjacent side surfaces of two adjacent fixed grate bars (320) in the burnout section; The fixed grate bar (320) in the burnout section has a fifth restraint pull rod fixing hole (3204) penetrating along the juxtaposing direction. A grate bar fifth restraint pull rod (322) is jointly passed through the fifth restraint pull rod fixing holes (3204) of a plurality of fixed grate bars (320) in the burnout section; The end of the grate bar fifth restraint pull rod (322) is fixed with a fifth end restraint nut (3220), and a plurality of fifth disc springs (323) are provided in a pressing manner between the fifth end restraint nut (3220) and an adjacent fixed grate bar (320) in the burnout section; 9. The lightweight nickel-free grate structure according to claim 6, characterized in that, The sliding grate bar group (33) in the burnout section is formed by juxtaposing a plurality of sliding grate bars (330) in the burnout section. The bottom of the sliding grate bar (330) in the burnout section has a sixth fixed connection groove (3301) and a sixth structure accommodating groove (3302) with openings facing downwards. The sixth structural accommodation groove (3302) has a plurality of sixth heat dissipation rib plates (3303) arranged in parallel; The adjacent side surfaces of the burnout section sliding grate plates (330) have sixth pin connection holes (331), and a sixth restraint pin (3310) is commonly connected in the sixth pin connection holes (331) on the adjacent side surfaces of two adjacent burnout section sliding grate plates (330); The burnout section sliding grate plates (330) have sixth restraint tie rod fixing holes (3304) penetrating along the side-by-side arrangement direction, and a grate plate sixth restraint tie rod (332) is commonly inserted through the sixth restraint tie rod fixing holes (3304) of a plurality of the burnout section sliding grate plates (330); The end of the grate plate sixth restraint tie rod (332) is threadedly fixed with a sixth end restraint nut (3320), and a plurality of sixth disc springs (333) are arranged in a pressing manner between the sixth end restraint nut (3320) and an adjacent burnout section sliding grate plate (330); 10. A lightweight nickel-free grate structure according to claim 9, characterized in that, A burnout section grate structure driving mechanism (34) is arranged below the burnout section grate structure (30). The burnout section grate structure driving mechanism (34) includes a third driving support frame (341) fixed on the inner side wall of the waste incinerator. A plurality of third hydraulic driving rods (342) are fixed on the third driving support frame (341). The inner rod ends of the third hydraulic driving rods (342) are commonly connected with a third linkage driving frame (343). A plurality of parallelly arranged third grate plate connection shafts (344) are fixed on the top of the third linkage driving frame (343), and the third grate plate connection shafts (344) are respectively clamped in the sixth fixed connection grooves (3301) of the respective burnout section sliding grate plate groups (33); A third clamping restraint plate (3305) is fixed at the position of the fourth fixed connection groove (2301) on the lower side of the combustion section sliding grate plate (230), and the third clamping restraint plate (3305) presses and restrains on the outer side surface of the third grate plate connection shaft (344).

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