Deslagging device and method for household garbage incinerator

Abstract

The invention discloses a slag discharging device and method for a household garbage incinerator, and relates to the field of household garbage incineration.The slag discharging device comprises a crushing unit used for crushing slag, and a feeding port of the crushing unit is located under a slag falling port; the transportation heat exchange unit comprises a water cooling sleeve and a spiral conveying piece movably arranged in the water cooling sleeve, the water cooling sleeve and the spiral conveying piece are externally connected with cooling water circulation equipment through pipelines respectively, the pipelines are further connected with a heat exchange mechanism, the water cooling sleeve comprises a first inlet and a first outlet, and the first inlet is communicated with the first outlet. The first inlet is communicated with a discharge hole of the crushing unit; according to the slag treatment device, a continuous slag treatment path is constructed through sequential connection and functional cooperation of the crushing unit, the transportation heat exchange unit and the cooling dust-settling unit, slag treatment is completed in a closed environment, the slag treatment efficiency is improved, and the slag treatment efficiency is improved. And environmental pollution and energy loss are avoided.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of household garbage incinerator slagging, and particularly relates to a household garbage incinerator slagging device and method. BACKGROUND

[0002] After household garbage is incinerated in a mechanical grate furnace, the generated slag has high temperature (above 500 DEG C), complex composition, is easy to be caked, and contains a large amount of heat.

[0003] Although the common wet method (water seal slag grab) slagging method can effectively cool, it has the following problems: the high-temperature slag is rapidly cooled by water to generate a large amount of steam containing pollutants, heat energy cannot be recovered, and the "slag explosion" phenomenon is serious, and the equipment is corroded fast; although the dry method slagging can recover heat energy, the high-temperature red slag is easy to be caked and blocked on the material falling port or the conveyor, which affects the continuous and stable operation, and the subsequent high-temperature crushing is difficult and the dust production is high, in addition, the existing technology usually takes the crushing, cooling and dust removal as independent processes, the system is complex, the energy consumption is high, and the contradiction between the slag blocking and the dust control cannot be solved.

[0004] Therefore, it is urgent to provide a household garbage incinerator slagging device and method. SUMMARY

[0005] In order to overcome the above technical problems, the purpose of the present application is to provide a household garbage incinerator slagging device and method.

[0006] The purpose of the present application can be realized by the following technical solutions: A household garbage incinerator slagging device is arranged below a slag falling port at the tail of a grate, and comprises: A crushing unit is used for crushing the slag, and an inlet thereof is located directly below the slag falling port; A conveying and heat exchanging unit comprises a water cooling sleeve and a spiral conveying piece movably arranged in the water cooling sleeve, the water cooling sleeve and the spiral conveying piece are respectively connected with a cooling water circulating device through pipelines, a heat exchanging mechanism is further connected to the pipelines, the water cooling sleeve comprises a first inlet and a first outlet, and the first inlet is in communication with an outlet of the crushing unit; A cooling and dust removal unit comprises a sealed cavity and a cooling and dust removal piece arranged in the sealed cavity, the sealed cavity comprises a second inlet and a second outlet, and the second inlet is in communication with the first outlet; Wherein, the slag sequentially enters the crushing unit, the water cooling sleeve and the sealed cavity after leaving the slag falling port.

[0007] As a further scheme of the present application, the crushing unit adopts a high-temperature resistant toothed roll crusher, the toothed roll surface of the high-temperature resistant toothed roll crusher is provided with heat-resistant alloy crushing teeth, and the high-temperature resistant toothed roll crusher is driven by a variable frequency speed regulation motor.

[0008] As a further scheme of the present application: the spiral conveying member comprises a rotating shaft movably arranged in the water cooling sleeve, and conveying blades spirally arranged along the outer wall of the rotating shaft in the axial direction; One end of the rotating shaft is provided with a rotary motor, and the rotating shaft is connected with the output end of the rotary motor through a transmission structure, and the rotary motor is used for driving the rotating shaft to rotate.

[0009] As a further scheme of the present application: the rotating shaft and the conveying blades are both hollow structures and are communicated with each other, the rotating shaft is respectively provided with a water inlet rotary joint and a water outlet rotary joint at two ends, the water inlet rotary joint and the water outlet rotary joint are respectively connected with an external cooling water circulating device through pipelines, and a flow regulating valve is further connected on the pipeline; The water inlet rotary joint is located at one end of the rotating shaft close to the first outlet of the water cooling sleeve, and the flow direction of the cooling water in the rotating shaft is opposite to the moving direction of the slag in the water cooling sleeve.

[0010] As a further scheme of the present application: the water cooling sleeve comprises a hollow outer wall, the hollow outer wall is provided with a water inlet hole and a water outlet hole, the water inlet hole and the water outlet hole are respectively connected with an external cooling water circulating device through pipelines, and a flow regulating valve is further connected on the pipeline; The flow direction of the cooling water in the hollow outer wall is opposite to the moving direction of the slag in the water cooling sleeve.

[0011] As a further scheme of the present application: the cooling and dust removing member is mounted on the inner wall of the sealing cavity, the cooling and dust removing member adopts an electrically controlled atomizing nozzle, and a plurality of the cooling and dust removing members are arranged.

[0012] As a further scheme of the present application: further comprising a control system, a first temperature sensor arranged at the inlet of the crushing unit, a second temperature sensor arranged at the first outlet, a third temperature sensor arranged at the second outlet, and a dust concentration monitor; The first temperature sensor, the second temperature sensor, the third temperature sensor and the dust concentration monitor are respectively electrically connected with the control system, and the variable frequency speed regulation motor, the flow regulating valve and the electrically controlled atomizing nozzle of the high-temperature-resistant toothed roll crusher are respectively electrically connected with the control system.

[0013] A household garbage incinerator slag discharging method adopts the household garbage incinerator slag discharging device as described above, and comprises the following steps: S1: high-temperature slag discharged from the tail of the grate is directly dropped into the crushing unit, and the high-temperature-resistant toothed roll crusher is used to forcibly crush the slag, so that the particle size of the slag is broken to below 100 mm; S2: send the broken high-temperature furnace slag into the transportation heat exchange unit, perform primary cooling on the furnace slag, reduce the temperature of the furnace slag to 150-200 DEG C, and recycle the heat released by the furnace slag through the heat exchange equipment; S3: send the once-cooled furnace slag into the cooling dust-settling unit, start the atomizing nozzle to spray atomized water to the furnace slag to perform dust settling and secondary cooling on the furnace slag, reduce the temperature of the furnace slag to below 80 DEG C, and reduce the dust concentration to below 10 mg / Nm3; S4: send the filtered slag discharged from the cooling dust-settling unit to the slag warehouse through subsequent conveying equipment.

[0014] As a further scheme of the present application: in step S1, the control system controls the variable frequency motor to adjust the rotating speed according to the slag temperature measured and fed back by the first temperature sensor; In step S2, the control system controls the flow regulating valve to adjust the flow of the cooling water according to the slag temperature measured and fed back by the second temperature sensor; In step S3, the control system controls the electrically-controlled atomizing nozzle to adjust the amount of sprayed water and the atomization degree according to the slag temperature after secondary cooling measured and fed back by the third temperature sensor and the dust concentration measured and fed back by the dust concentration monitor.

[0015] As a further scheme of the present application: in step S2, the heat absorbed in the primary cooling process is transferred to an external heat utilization system through the heat exchange mechanism.

[0016] The present application has the following advantages: the present application sequentially connects and functionally cooperates the breaking unit, the transportation heat exchange unit and the cooling dust-settling unit to build a continuous slag discharge and treatment path, and completes the treatment of the furnace slag in a closed environment to avoid environmental pollution and energy loss; the present application directly solves the problem of "easy sticking and blocking of high-temperature red slag" in the dry slag discharge method by prepositioning the high-temperature breaking process of the breaking unit in the closed system, guarantees the continuity of the logistics, and further increases the heat exchange surface area due to the uniform particle size, so that the efficiency of the subsequent indirect cooling in the transportation heat exchange unit is much higher than that of the cooling of the original large or clumped furnace slag; in addition, the present application uses the indirect heat exchange mode with the water-cooled sleeve and the spiral conveying member as the core to perform the primary cooling, avoids the phenomena of "a large amount of steam", "slag explosion" and equipment corrosion caused by "high-temperature furnace slag being rapidly cooled by water" in the wet slag discharge method, recycles the heat of the furnace slag by setting the heat exchange mechanism on the cooling water circulation pipeline, overcomes the defect of "inability to recycle heat" in the wet slag discharge method, and finally, the cooling dust-settling unit performs controllable spray treatment on the cooled furnace slag at the end of the slag discharge, effectively suppresses the diffusion of dust, and alleviates the contradiction between the slag blocking and dust control in the traditional method. BRIEF DESCRIPTION OF DRAWINGS

[0017] The present application will be further described below with reference to the drawings.

[0018] Figure 1 is a schematic diagram of the overall structure of an embodiment of the present application; Figure 2 is a schematic diagram of a transport heat exchange unit of an embodiment of the present application; Figure 3 is a schematic diagram of the working process of a control system of an embodiment of the present application; Figure 4 is a schematic diagram of the steps of a household garbage incinerator slagging method of an embodiment of the present application.

[0019] The reference signs are as follows: 1, crushing unit; 2, transport heat exchange unit; 21, water cooling sleeve; 22, heat exchange mechanism; 23, screw conveying piece; 211, first inlet; 212, first outlet; 3, cooling dust setting unit; 31, sealed cavity; 32, cooling and dust removing piece; 311, second inlet; 312, second outlet; 11, heat-resistant alloy crushing tooth; 231, rotating shaft; 232, conveying blade; 24, rotary motor; 233, water inlet rotary joint; 234, water outlet rotary joint; 25, flow regulating valve; 213, hollow outer wall; 214, water inlet hole; 215, water outlet hole; 4, control system; 41, first temperature sensor; 42, second temperature sensor; 43, third temperature sensor; 44, dust concentration monitor. DETAILED DESCRIPTION

[0020] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the scope of the present application.

[0021] Referring to Figure 1 , a household garbage incinerator slagging device of an embodiment of the present application is arranged below a slagging port at the tail of a grate, and comprises: a crushing unit 1 for crushing slag, with an inlet located directly below the slagging port; a transport heat exchange unit 2 comprising a water cooling sleeve 21 and a screw conveying piece 23 movably arranged in the water cooling sleeve 21, the water cooling sleeve 21 and the screw conveying piece 23 being respectively connected to a cooling water circulating device through a pipeline, and a heat exchange mechanism 22 being further connected to the pipeline; the water cooling sleeve 21 comprises a first inlet 211 and a first outlet 212, and the first inlet 211 is in communication with a discharge port of the crushing unit 1; a cooling dust setting unit 3 comprising a sealed cavity 31 and a cooling and dust removing piece 32 installed in the sealed cavity 31, the sealed cavity 31 comprising a second inlet 311 and a second outlet 312, and the second inlet 311 is in communication with the first outlet 212; wherein the slag sequentially enters the crushing unit 1, the water cooling sleeve 21 and the sealed cavity 31 after leaving the slagging port.

[0022] Specifically, the high-temperature slag (temperature is usually above 500 DEG C) generated after the household garbage is incinerated in the incinerator is directly discharged from the slag falling port at the tail of the grate, and falls naturally by gravity. The slag first falls into the inlet of the crushing unit 1 located directly below the slag falling port. The crushing unit 1 forcibly mechanically crushes the high-temperature and easily caked slag, so that the particle size is reduced and the structure is loose, facilitating subsequent processing and conveying. The crushed slag enters the water-cooled sleeve 21 of the conveying and heat exchanging unit 2 from the first inlet 211 through the discharge port. The slag moves forward along the sleeve under the pushing of the screw conveying member 23. In this process, cooling water is circulated through the pipeline and is introduced into the water-cooled sleeve 21 and the screw conveying member 23, exchanges heat with the high-temperature slag, and recovers heat energy through the heat exchanging mechanism 22 connected to the cooling water circulation pipeline, so as to realize preliminary cooling of the slag. Then, the slag is discharged from the first outlet 212, enters the sealed cavity 31 of the cooling and dust removal unit 3 from the second inlet 311, and is treated by the cooling and dust removal member 32 through spraying or spraying, so as to further reduce the temperature of the slag and inhibit the diffusion of dust. Finally, the slag after dust removal and cooling is discharged from the second outlet 312 and is transported to the slag bin by subsequent conveying equipment.

[0023] Further, the present application sequentially connects and cooperates the functions of the crushing unit 1, the conveying and heat exchanging unit 2, and the cooling and dust removal unit 3 to build a continuous slag discharging and processing path, so as to complete the slag processing in a closed environment and avoid environmental pollution and energy loss. The present application directly solves the problem of "high-temperature red slag easy to caking and blocking" in the dry slag discharging by prepositioning the high-temperature crushing process of the crushing unit 1 in the closed system, so as to ensure the continuity of the logistics. In addition, the uniform particle size greatly increases the heat exchange surface area, so that the indirect cooling efficiency in the conveying and heat exchanging unit 2 is much higher than that of the original large block or caked slag. Secondly, the indirect heat exchange mode using the water-cooled sleeve 21 and the screw conveying member 23 as the core is adopted for primary cooling, so as to avoid the phenomena of "a large amount of steam", "slag explosion" and equipment corrosion caused by "high-temperature slag being rapidly cooled by water" in the wet slag discharging. Furthermore, the heat of the slag is recovered by setting the heat exchanging mechanism 22 on the cooling water circulation pipeline, so as to overcome the defect of "heat energy cannot be recovered" in the wet slag discharging. Finally, the cooling and dust removal unit 3 at the end of the slag discharging performs controllable spraying treatment on the cooled slag, so as to effectively inhibit the diffusion of dust while ensuring that the final discharge temperature meets the standard, and to relieve the contradiction between slag blocking and dust control in the traditional way.

[0024] It should be noted that the traditional technical problem is that if water is sprayed first (wet method), steam and corrosion are generated; if no water is sprayed throughout (dry method), dust is large and the final temperature is difficult to meet the standard. The present scheme strictly divides the dry heat exchange area (transport heat exchange unit 2) and the controllable humidification area (cooling dust removal unit 3) in space, strictly separates the working areas of the two, ensures that the slag enters the wet spraying stage after dry cooling and the temperature has been reduced to a safe range, the water consumption is much lower than that of the traditional water immersion method, and the problems of large amount of steam and pollution diffusion are avoided, at the same time, through the collision and condensation of water mist and dust particles, the dust emission in the unloading and conveying process is significantly inhibited, the working environment is improved, and the particulate matter emission is reduced.

[0025] Referring to Figure 1 Optionally, the crushing unit 1 adopts a high-temperature-resistant toothed roll crusher to cope with high-temperature slag directly discharged from the slag discharge port at the tail of the grate, the toothed roll surface of the high-temperature-resistant toothed roll crusher is provided with heat-resistant alloy crushing teeth 11 to enhance the wear resistance and high-temperature resistance of the high-temperature-resistant toothed roll crusher, and the high-temperature-resistant toothed roll crusher is driven by a variable frequency speed regulation motor.

[0026] Referring to Figures 1-2 Optionally, the screw conveying member 23 includes a rotating shaft 231 movably arranged in the water cooling sleeve 21, and conveying blades 232 spirally distributed along the axial outer wall of the rotating shaft 231; one end of the rotating shaft 231 is provided with a rotating motor 24, the rotating shaft 231 is connected with the output end of the rotating motor 24 through a transmission structure, the output end of the rotating motor 24 is axially parallel to the rotating shaft 231, the transmission structure can adopt gear transmission, transmission belt, etc., and the rotating motor 24 is used to drive the rotating shaft 231 to rotate. In addition, the spiral conveying blades 232 can not only transport the slag, but also increase the contact area of the screw conveying member 23, thereby effectively improving the cooling effect of the screw conveying member 23 on the slag.

[0027] In the embodiment, the crushed slag enters the water cooling sleeve 21 from the first inlet 211, the output end of the rotating motor 24 is controlled to rotate and drive the rotating shaft 231 and the spiral conveying blades 232 to rotate through the transmission structure to push the slag to move in the direction of the first outlet 212, so as to realize the continuous conveying of the slag in the cooling process.

[0028] Referring to Figures 1-2Optionally, the rotating shaft 231 and the conveying blade 232 are both hollow structures and are communicated with each other, two ends of the rotating shaft 231 are respectively provided with a water inlet rotary joint 233 and a water outlet rotary joint 234, the water inlet rotary joint 233 and the water outlet rotary joint 234 are respectively connected with an external cooling water circulating device through pipelines, and a flow regulating valve 25 is further connected on the pipelines; the water inlet rotary joint 233 is located at one end of the rotating shaft 231 close to the first outlet 212 of the water cooling sleeve 21, the water outlet rotary joint 234 is located at one end of the rotating shaft 231 close to the first inlet 211 of the water cooling sleeve 21, and the flow direction of the cooling water in the rotating shaft 231 is opposite to the moving direction of the slag in the water cooling sleeve 21.

[0029] In the embodiment, the external cooling water circulating device inputs the cooling water into the hollow chamber of the rotating shaft 231 and the conveying blade 232 through the water inlet rotary joint 233, and the cooling water flows reversely along the opposite direction of the slag movement while the conveying member rotates and pushes the slag to move to the outlet, the water not heated by the slag first passes through the low-temperature end of the spiral conveying member 23, and then enters the high-temperature end after the temperature gradually increases through the reverse heat exchange with the slag, so that the high average temperature difference between the cooling water and the slag is maintained, and the heat exchange efficiency is strengthened.

[0030] Referring to Figures 1-2 Optionally, the water cooling sleeve 21 comprises a hollow outer wall 213, the hollow outer wall 213 is provided with a water inlet hole 214 and a water outlet hole 215, the water inlet hole 214 and the water outlet hole 215 are respectively connected with the external cooling water circulating device through pipelines, and the flow regulating valve 25 is further connected on the pipelines; the flow direction of the cooling water in the hollow outer wall 213 is opposite to the moving direction of the slag in the water cooling sleeve 21.

[0031] In the embodiment, the external cooling water circulating device inputs the cooling water into the hollow chamber of the hollow outer wall 213 through the water inlet hole 214, and the cooling water flows reversely along the opposite direction of the slag movement, the water not heated by the slag first passes through the low-temperature side of the water cooling sleeve 21, and then enters the high-temperature side after the temperature gradually increases through the reverse heat exchange with the slag, so that the high average temperature difference between the cooling water and the slag is maintained, and the heat exchange efficiency is strengthened, in addition, the spiral conveying member 23 and the water cooling sleeve 21 constitute double cooling for the slag, and the cooling effect of the conveying and heat exchange unit 2 is improved, in addition, the longer conveying path formed by the cooling sleeve and the spiral conveying member 23 can also improve the contact time of the slag with the cooling sleeve and the spiral conveying member 23.

[0032] Referring to Figures 1-2 Optionally, the cooling and dust removal member 32 is installed on the inner wall of the sealing cavity 31, the cooling and dust removal member 32 adopts an electric control atomizing nozzle, an electromagnetic valve or a proportional needle valve is integrated at the inlet of the atomizing nozzle, and the electric signal of the control system 4 is received to realize the electric adjustment of the spraying amount or start-stop, and the cooling and dust removal member 32 is provided with a plurality of electric control atomizing nozzles, and the water mist sprayed by the plurality of electric control atomizing nozzles is used for multi-angle and sufficient cooling and dust removal of the slag.

[0033] Referring to Figures 1-3 Optionally, the control system 4 is further included, the first temperature sensor 41 is arranged at the inlet of the crushing unit 1, the second temperature sensor 42 is arranged at the first outlet 212, the third temperature sensor 43 is arranged at the second outlet 312, and the dust concentration monitor 44 is arranged; the first temperature sensor 41, the second temperature sensor 42, the third temperature sensor 43 and the dust concentration monitor 44 are respectively electrically connected with the control system 4, the variable frequency speed regulation motor of the high-temperature-resistant tooth roll crusher, the flow regulating valve 25 and the atomizing nozzle are respectively electrically connected with the control system 4.

[0034] In the embodiment, the control system 4 is configured to receive the electrical signals from the first temperature sensor 41, the first temperature sensor 41, the second temperature sensor 42, the third temperature sensor 43, the dust concentration monitor 44, and process the signals based on a preset logic or algorithm, and then generate control instructions to adjust the working state of the high-temperature-resistant tooth roll crusher, the flow regulating valve 25 and the electrically-controlled atomizing nozzle; the control system 4 can be integrally installed on the outer wall of the sealing cavity 31 through the mounting frame, or can be installed at a position such as a rack or the ground in the working field of the device.

[0035] Specifically, the control system 4 controls the variable frequency speed regulation motor of the high-temperature-resistant tooth roll crusher to adjust the rotating speed of the crusher according to the temperature measured by the first temperature sensor 41; when the slag temperature is high and the viscosity is large, the rotating speed is reduced to enhance the shearing and crushing effect, and vice versa; the two flow regulating valves 25 are controlled to adjust the circulating flow of the cooling water according to the temperature measured by the second temperature sensor 42; when the slag temperature is high, the flow of the cooling water is increased, and vice versa; the cooling and dust removal device 32 is controlled to adjust the water amount and atomization particle size of the electrically-controlled atomizing spray according to the temperature measured by the third temperature sensor 43 and the dust concentration in the sealing cavity 31 measured by the dust concentration monitor 44.

[0036] Referring to Figures 1-4 The slag discharging method of the household waste incinerator according to the embodiment of the present application adopts the slag discharging device of the household waste incinerator according to any one of claims 6-7, and is characterized by comprising the following steps: S1: The high-temperature slag discharged from the tail of the grate is directly dropped into the crushing unit 1, and the high-temperature-resistant tooth roll crusher is used to forcibly crush the slag, so that the particle size of the slag is broken to below 100 mm; S2: The crushed high-temperature slag is sent into the transportation and heat exchange unit 2, the slag is once cooled, the temperature of the slag is reduced to 150-200℃, and the heat released by the slag is recycled through the heat exchange equipment, so that energy saving and environmental protection are achieved; S3: the once-cooled slag is sent into the cooling and dust-settling unit 3, the atomizing nozzles are started to spray atomizing water to the slag to carry out dust settling and secondary cooling, the temperature of the slag is reduced to below 80 DEG C, the dust concentration is reduced to below 10 mg / Nm3, and deep dust settling of the slag is realized; S4: the filtered slag discharged from the cooling and dust-settling unit 3 is transported to the slag yard through subsequent conveying equipment.

[0037] In the embodiment, the method cooperates the crushing unit 1, the conveying and heat exchanging unit 2 and the cooling and dust-settling unit 3 according to specific temperature thresholds and functional sequences, actively controls the physical state and heat energy release process of the slag at the process flow level, effectively recovers the sensible heat in the slag, overcomes the heat energy waste defect of the wet slag discharge, separates and sequentially carries out the dry cooling and the wet dust settling, avoids the plugging risk of the dry slag discharge and the steam pollution problem of the wet slag discharge, and finally realizes continuous, stable, low-consumption and clean emission of the household garbage incineration slag treatment.

[0038] Referring to Figures 1-4 Optionally, in step S1, the control system 4 controls the variable frequency motor to adjust the rotating speed according to the slag temperature measured and fed back by the first temperature sensor 41; in step S2, the control system 4 controls the flow adjusting valve 25 to adjust the flow of the cooling water according to the slag temperature measured and fed back by the second temperature sensor; in step S3, the control system 4 controls the electrically-controlled atomizing nozzle to adjust the spraying water amount and the atomizing degree according to the slag temperature after secondary cooling measured and fed back by the third temperature sensor 43 and the dust concentration measured and fed back by the dust concentration monitor 44.

[0039] Referring to Figures 1-4 Optionally, in step S2, the heat absorbed in the primary cooling process is transferred to an external heat utilization system through the heat exchanging mechanism 22, heat energy recovery and resource utilization are realized, and the energy utilization efficiency is improved.

[0040] In the description of the present application, it should be understood that the terms "upper", "lower", "left", "right", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, and a particular orientation configuration and operation, therefore, cannot be understood as a limitation on the present application. In addition, "first", "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features limited by "first", "second" can explicitly or implicitly include one or more features. In the description of the present application, unless otherwise specified, the meaning of "multiple" is two or more.

[0041] In the description of the application, it should be noted that unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connecting" and the like should be understood in a broad sense, for example, can be fixedly connected, can be detachably connected, or integrally connected; can be mechanically connected, or electrically connected; can be directly connected, or indirectly connected through an intermediate medium, or can be connected inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0042] The above describes one embodiment of the present application in detail, but the content described is only a preferred embodiment of the present application, and cannot be considered as limiting the scope of the present application. Any equivalent changes and improvements made within the scope of the present application should still be attributed to the patent coverage of the present application.

Claims

1. A refuse incinerator slagging device provided below a slagging port at the end of a grate, characterized in that, The application relates to a slag treatment device. The device comprises a crushing unit (1) for crushing slag, a slag inlet of which is located directly below a slag falling port; a conveying and heat exchanging unit (2) which comprises a water-cooled sleeve (21) and a spiral conveying element (23) movably arranged in the water-cooled sleeve (21), the water-cooled sleeve (21) and the spiral conveying element (23) are respectively connected with a cooling water circulating device through pipelines, a heat exchanging mechanism (22) is further connected to the pipelines, the water-cooled sleeve (21) comprises a first inlet (211) and a first outlet (212), the first inlet (211) is communicated with a slag outlet of the crushing unit (1); a cooling and dust removing unit (3) which comprises a sealed cavity (31) and a cooling and dust removing element (32) arranged in the sealed cavity (31), the sealed cavity (31) comprises a second inlet (311) and a second outlet (312), the second inlet (311) is communicated with the first outlet (212); wherein the slag sequentially enters the crushing unit (1), the water-cooled sleeve (21) and the sealed cavity (31) after leaving the slag falling port. The crushing unit (1) adopts a high-temperature-resistant toothed roller crusher, heat-resistant alloy crushing teeth (11) are arranged on the surface of the toothed roller of the high-temperature-resistant toothed roller crusher, and the high-temperature-resistant toothed roller crusher is driven by a frequency conversion speed regulation motor. The spiral conveying element (23) comprises a rotating shaft (231) movably arranged in the water-cooled sleeve (21) and conveying blades (232) spirally arranged on the axial outer wall of the rotating shaft (231). One end of the rotating shaft (231) is provided with a rotating motor (24), the rotating shaft (231) is connected with the output end of the rotating motor (24) through a transmission structure, and the rotating motor (24) is used for driving the rotating shaft (231) to rotate.

2. The household waste incinerator grate slagging device according to claim 1, characterized in that, The rotating shaft (231) and the conveying blades (232) both adopt hollow structures and are communicated with each other, water inlet rotating joints (233) and water outlet rotating joints (234) are respectively arranged at two ends of the rotating shaft (231), the water inlet rotating joints (233) and the water outlet rotating joints (234) are respectively connected with external cooling water circulating devices through pipelines, and flow adjusting valves (25) are further connected to the pipelines.

3. The household waste incinerator grate slagging device according to claim 2, characterized in that, The water inlet rotating joint (233) is located at one end of the rotating shaft (231) close to the first outlet (212) of the water-cooled sleeve (21), and the flow direction of the cooling water in the rotating shaft (231) is opposite to the moving direction of the slag in the water-cooled sleeve (21). The water-cooled sleeve (21) comprises a hollow outer wall (213), water inlets (214) and water outlets (215) are arranged on the hollow outer wall (213), the water inlets (214) and the water outlets (215) are respectively connected with external cooling water circulating devices through pipelines, and flow adjusting valves (25) are further connected to the pipelines.

4. The household waste incinerator grate slagging device according to claim 3, characterized in that, The flow direction of the cooling water in the hollow outer wall (213) is opposite to the moving direction of the slag in the water-cooled sleeve (21). ​ 5. The household waste incinerator grate slagging device according to claim 4, characterized in that, ​ ​ 6. The household waste incinerator grate slagging device according to claim 5, characterized in that, The cooling and dust removal device (32) is installed on the inner wall of the sealed cavity (31), the cooling and dust removal device (32) adopts an electrically controlled atomizing nozzle, and the cooling and dust removal device (32) is provided with a plurality of.

7. The household waste incinerator grate slagging device according to claim 6, characterized in that, Also comprising a control system (4), a first temperature sensor (41) arranged at the inlet of the crushing unit (1), a second temperature sensor (42) arranged at the first outlet (212), a third temperature sensor (43) arranged at the second outlet (312) and a dust concentration monitor (44); The first temperature sensor (41), the second temperature sensor (42), the third temperature sensor (43) and the dust concentration monitor (44) are electrically connected with the control system (4), and the variable frequency speed regulation motor of the high-temperature-resistant tooth roll crusher and the flow regulating valve (25) and the electrically controlled atomizing nozzle are electrically connected with the control system (4).

8. A method for slagging of a domestic waste incinerator, using the slagging device for a domestic waste incinerator according to claim 7, characterized in that, The method comprises the following steps: S1: The high-temperature slag discharged from the rear part of the grate is directly dropped into the crushing unit (1), and the slag is forced to be crushed by the high-temperature-resistant tooth roll crusher, so that the particle size of the slag is broken to below 100 mm; S2: The crushed high-temperature slag is sent into the transportation and heat exchange unit (2) to cool the slag once, so that the temperature of the slag is reduced to 150-200 DEG C, and the heat released by the slag is recovered through the heat exchange equipment; S3: The once-cooled slag is sent into the cooling and dust removal unit (3), the atomizing nozzle is started to spray atomized water to the slag to remove dust and cool the slag twice, so that the temperature of the slag is reduced to below 80 DEG C, and the dust concentration is reduced to below 10 mg / Nm3; S4: The filtered slag discharged from the cooling and dust removal unit (3) is transported to the slag bin through subsequent conveying equipment.

9. The household garbage grate slag device according to claim 8, characterized in that, In step S1, the control system (4) controls the variable frequency speed regulation motor to adjust the rotating speed according to the slag temperature measured and fed back by the first temperature sensor (41); In step S2, the control system (4) controls the flow regulating valve (25) to adjust the flow of cooling water according to the slag temperature measured and fed back by the second temperature sensor; In step S3, the control system (4) controls the electrically controlled atomizing nozzle to adjust the amount of sprayed water and the atomization degree according to the slag temperature after secondary cooling measured and fed back by the third temperature sensor (43) and the dust concentration measured and fed back by the dust concentration monitor (44).

10. The household waste incinerator grate slagging device according to claim 1 or 9, characterized in that, In step S2, the heat absorbed in the process of primary cooling is transferred to an external heat system through the heat exchange mechanism (22).

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