Dry type slag extractor of hazardous waste incineration rotary kiln

Abstract

The invention provides a hazardous waste incineration rotary kiln dry type slag extractor which comprises a slag extractor body, a slag screening assembly, a slag transferring assembly and a plurality of cooling spraying assemblies, the slag extractor body is provided with a slag discharging channel and a slag falling channel, a plurality of screening mechanisms are arranged in the slag discharging channel in an up-down spaced mode, and high-temperature slag enters the slag falling channel through a slag outlet; the slag falls into the slag falling channel, falls onto the slag screening assembly below along the slag falling channel, is subjected to multi-stage screening of the multiple screening mechanisms, large-size slag is located on the upper portion, small-size slag is located on the lower portion, and then the large-size slag reaches the position above the corresponding apron conveyors through the discharging ends of the screening mechanisms and is conveyed to discharging ports of the slag discharging machines through the apron conveyors. In the conveying period of the apron conveyor, the cooling spraying assemblies at different positions can be controlled to spray appropriate water according to the size of the slag, the slag can be cooled, meanwhile, the situation that the weight of the slag is increased due to excessive water absorption can be prevented, and the treatment cost of an incineration plant is reduced.

Description

Technical Field

[0001] The invention belongs to the technical field of rotary kiln slag discharge devices, and in particular relates to a dry-type slag discharger for a hazardous waste incineration rotary kiln. Background Art

[0002] Rotary kiln incineration is a method for treating hazardous waste (HW). Combustible materials, such as organic matter, contained in the HW are fully burned within the kiln, achieving harmless treatment and volume reduction. Non-combustible inorganic materials, such as slag, are ultimately discharged through the slag outlet at the kiln's rear end. The discharged slag is hot and requires cooling. Once cooled, it can then be transferred to a qualified disposal facility for harmless disposal.

[0003] Existing cooling methods for rotary kiln slag often involve water immersion, where the hot slag is conveyed directly by scraper conveyor and immersed in a water pool. This treatment method results in a slag moisture content of approximately 40%, and even after draining, it still contains approximately 30% water. Since incineration plants pay for slag transfers based on weight, high-water content slag leads to high handling costs, and the slag must be partially evaporated before it can be transferred to relevant units for processing. Summary of the Invention

[0004] The present invention provides a dry slag discharger for a hazardous waste incineration rotary kiln, aiming to solve the problem of high water content in slag of the rotary kiln in the prior art.

[0005] To achieve the above-mentioned purpose, the technical solution adopted by the present invention is to provide a dry-type slag discharger for a hazardous waste incineration rotary kiln, comprising: The slag discharger body has a horizontal slag discharge channel and a vertical slag falling channel, the lower end of the slag falling channel is connected to the top of the slag discharge channel, and the upper end of the slag falling channel is connected to the slag discharge port of the rotary kiln; A slag screening assembly, comprising a plurality of screening mechanisms spaced apart from top to bottom in the slag discharge channel, wherein the material screening diameters of the plurality of screening mechanisms decrease from top to bottom, and each screening mechanism has a discharge end; a slag transfer assembly comprising a plurality of slab conveyors spaced apart from top to bottom within the slag discharge channel, wherein each of the discharging ends of the screening mechanism is provided with a corresponding slab conveyor, and wherein the conveying direction of the slab conveyors is parallel to the length direction of the slag discharge channel; and A plurality of cooling spray assemblies are arranged above the scale plate conveyor in a one-to-one correspondence.

[0006] In a possible implementation, the screening mechanism includes: A transmission chain is provided in the slag discharge channel, the transmission chain is in a horizontal and closed ring shape, and the transmission chain has two parallel straight segments and two arc segments, the two arc segments are respectively connected between the two straight segments, one of the straight segments is located below the slag discharge channel, and one of the arc segments corresponds to the top of the scale conveyor; A chain drive unit, configured to drive the transmission chain to circulate; and Multiple supporting rods are arranged at equal intervals on the transmission chain, one end of the supporting rod is connected to the corresponding link of the transmission chain, and the other end extends in the horizontal direction, and the extension direction is perpendicular to the moving direction of the transmission chain; the spacing between the supporting rods of the multiple screening mechanisms arranged from top to bottom decreases.

[0007] In one possible implementation, a supporting platform is provided on the side wall of the slag discharge channel away from the transmission chain. The supporting platform is long and extends along the length direction of the straight segment. When the supporting rod moves above the supporting platform, the end of the supporting rod is placed above the supporting platform.

[0008] In one possible implementation, the cooling spray assembly includes a water tank, a water pump, a water pipe, a spray head and a flow regulating valve. The water inlet end of the water pump is connected to the water tank, the water outlet end of the water pump is connected to the water pipe, the flow regulating valve is arranged on the water pipe, and the spray head is located above the corresponding scale conveyor.

[0009] In a possible implementation, stoppers are formed on both sides of the conveying surface of the scale conveyor, and the stoppers have drainage holes that penetrate through the thickness direction of the stoppers.

[0010] In a possible implementation, the hazardous waste incineration rotary kiln dry slag discharger also includes an air cooling component, which is used to blow air toward the conveying surface of the scale conveyor. The air cooling component is located behind the cooling spray component in the conveying direction of the scale conveyor.

[0011] In a possible implementation, a belt conveyor is provided at the discharge end of the scale conveyor in a one-to-one correspondence, and an iron removal device is further provided above the belt conveyor, and the iron removal device is used to absorb iron impurities in the slag.

[0012] In a possible implementation, a weighing platform is provided at the unloading end of the belt conveyor, a ton bag is provided on the weighing platform, and the weighing platform is connected to an audible and visual alarm device.

[0013] In a possible implementation, an air outlet is provided at the top of the slag discharge channel, and the air outlet is connected to a negative pressure suction device.

[0014] In a possible implementation, a material dropping control component is further provided in the slag dropping channel, and the material dropping control component includes: A rotating drum is horizontally arranged in the slag falling channel, the rotating drum is cylindrical, the interior of the rotating drum is hollow, and is divided into two centrally symmetrical accommodating chambers by a partition. The side wall of the rotating drum is provided with two feed ports, the feed ports are connected to the accommodating chambers in a one-to-one correspondence, and when one of the feed ports opens upward, the other feed port opens downward; and The second driving unit is provided on the slag discharger body and is used for driving the rotating drum to rotate around its own horizontal axis.

[0015] Compared with the prior art, the dry-type slag discharger for hazardous waste incineration rotary kiln provided by the present invention has the following beneficial effects: The dry slag discharger for the hazardous waste incineration rotary kiln provided by the present invention includes a slag discharger body, a slag screening assembly, a slag transfer assembly and a plurality of cooling spray assemblies. The slag discharger body has a slag discharge channel and a slag drop channel. A plurality of screening mechanisms are arranged in the slag discharge channel at intervals from top to bottom. The high-temperature slag enters the slag drop channel through the slag discharge port and falls along the slag drop channel to the slag screening assembly below. After multi-stage screening by the plurality of screening mechanisms, the large-volume slag is located at the top and the small-volume slag is located at the bottom. The slag then reaches the top of the corresponding scale conveyor through the discharge end of the screening mechanism and is transported to the discharge port of the slag discharger by the scale conveyor. Each scale conveyor is provided with a cooling spray assembly. During the conveyance of the scale conveyor, the cooling spray assemblies at different positions can be controlled to spray an appropriate amount of water according to the volume of the slag. The large-volume slag has a high calorie content and requires more cooling water to be sprayed. The small-volume slag has a low calorie content and requires less cooling water to be sprayed. The present invention can pre-screen the slag by arranging a slag screening component, and separate the slag in different volume ranges onto different scale conveyors. By reasonably controlling the spraying amount of cooling water, it can achieve cooling the slag while preventing the slag from gaining weight due to excessive water absorption, thereby reducing the processing cost of the incineration plant. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the present application.

[0017] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0018] One or more embodiments are exemplarily illustrated by pictures in the corresponding drawings. These exemplifications do not constitute limitations on the embodiments. Elements with the same reference numerals in the drawings are represented as similar elements. Unless otherwise stated, the figures in the drawings do not constitute proportional limitations.

[0019] Figure 1 A schematic diagram of the overall structure of a dry-type slag discharger for a hazardous waste incineration rotary kiln provided in an embodiment of the present application; Figure 2 A schematic diagram of the partial structure of a dry-type slag discharger for a hazardous waste incineration rotary kiln provided in an embodiment of the present application; Figure 3 This is a schematic structural diagram of the conveying surface of the scale plate conveyor in an embodiment of the present application; Figure 4 This is a schematic structural diagram of the rotating drum in an embodiment of the present application; Description of reference numerals: 10. Slag discharger body; 11. Slag discharge channel; 12. Slag falling channel; 13. Air outlet; 20. Slag screening assembly; 21. Screening mechanism; 211. Transmission chain; 212. Supporting rod; 30. Slag transfer assembly; 31. Scale conveyor; 311. Stopper; 312. Drain hole; 40. Cooling spray assembly; 41. Water pipe; 42. Spray head; 50. Belt conveyor; 60. Iron removal device; 70. Weighing platform; 71. Ton bag; 80. Dropping control assembly; 81. Rotating drum; 811. Accommodating chamber; 812. Feed port; 813. Partition; 82. Second drive unit. DETAILED DESCRIPTION

[0020] To make the purpose, technical solutions, and advantages of the embodiments of this application more clear, the technical solutions in the embodiments of this application will be clearly and completely described below in conjunction with the drawings in the embodiments of this application. Obviously, the described embodiments are part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0021] The disclosure below provides many different embodiments or examples for implementing different structures of the present application. In order to simplify the disclosure of the present application, the components and settings of specific examples are described below. Of course, these are merely examples and are not intended to limit the present application. In addition, the present application may repeat reference numbers and / or letters in different examples. Such repetition is for the purpose of simplicity and clarity and does not in itself indicate the relationship between the various embodiments and / or settings discussed.

[0022] For ease of description, spatially relative terms may be used herein to describe the relative position or movement of one element or feature relative to another element or feature as shown in the figures, such as "inside," "outside," "inside," "outside," "below," "beneath," "above," "above," "front," "back," and the like. Such spatially relative terms are intended to include different orientations of the device in use or operation other than the orientation depicted in the figures. For example, if the device in the figures undergoes a positional flip or a change in posture or a change in motion, then these directional indications will also change accordingly. For example, an element described as "below" or "below" another element or feature will subsequently be oriented as "above" or "above" another element or feature. Thus, the example term "below" can include both above and below orientations. The device may be oriented otherwise (rotated 90 degrees or in other orientations) and the spatially relative descriptors used herein will be interpreted accordingly.

[0023] Please also refer to Figures 1 to 4 , the following describes a dry-type slag discharger for a hazardous waste incineration rotary kiln provided in an embodiment of the present invention.

[0024] An embodiment of the present invention provides a dry-type slag discharger for a hazardous waste incineration rotary kiln, comprising a slag discharger body 10 , a slag screening assembly 20 , a slag transfer assembly 30 and a plurality of cooling spray assemblies 40 . The slag discharger body 10 has a horizontal slag discharge channel 11 and a vertical slag dropping channel 12. The lower end of the slag dropping channel 12 is connected to the top of the slag discharge channel 11, and the upper end of the slag dropping channel 12 is connected to the slag discharge port of the rotary kiln; the slag screening assembly 20 includes a plurality of screening mechanisms 21 arranged from top to bottom in the slag discharge channel 11, and the material screening diameters of the plurality of screening mechanisms 21 decrease from top to bottom, and each screening mechanism 21 has a discharge end; the slag transfer assembly 30 includes a plurality of scale conveyors 31 arranged from top to bottom in the slag discharge channel 11, and each screening mechanism 21 has a corresponding scale conveyor 31 at its discharge end, and the conveying direction of the scale conveyor 31 is parallel to the length direction of the slag discharge channel 11; a plurality of cooling spray assemblies 40 are arranged one by one above the scale conveyor 31.

[0025] Compared with the prior art, the dry-type slag discharger for hazardous waste incineration rotary kiln provided by the embodiment of the present invention has the following beneficial effects: The dry slag discharger for a hazardous waste incineration rotary kiln provided in an embodiment of the present invention includes a slag discharger body 10, a slag screening assembly 20, a slag transfer assembly 30 and multiple cooling spray assemblies 40. The slag discharger body 10 has a slag discharge channel 11 and a slag dropping channel 12. Multiple screening mechanisms 21 are arranged in the slag discharge channel 11 at intervals above and below. The high-temperature slag enters the slag dropping channel 12 through the slag discharge port and falls along the slag dropping channel 12 to the slag screening assembly 20 below. After multi-stage screening by multiple screening mechanisms 21, the large volume of slag is located at the top and the small volume of slag is located at the bottom. Then, the slag reaches the top of the corresponding scale conveyor 31 through the discharge end of the screening mechanism 21 and is transported to the discharge port of the slag discharger by the scale conveyor 31. Each scale conveyor 31 is provided with a cooling spray assembly 40. During the conveying period of the scale conveyor 31, the cooling spray assemblies 40 at different positions can be controlled to spray appropriate amounts of water according to the volume of the slag. Large-volume slag has a high calorie content, so more cooling water is required to be sprayed. Small-volume slag has a low calorie content, so less cooling water is required to be sprayed.

[0026] The embodiment of the present invention can pre-screen the slag by setting up a slag screening component 20, separate the slag in different volume ranges onto different scale conveyors 31, and reasonably control the spraying amount of cooling water according to the different volumes of slag, which can not only cool the slag, but also prevent the slag from absorbing too much water and increasing in weight after the temperature is lowered, thereby reducing the processing cost of the incineration plant.

[0027] The slag discharger body 10 has a horizontal slag discharge channel 11 formed inside and a slag drop channel 12 formed at the top. High-temperature slag produced by the rotary kiln falls through the slag drop channel 12 into the slag discharge channel 11. It is then screened by the slag screening assembly 20, allowing for subsequent application of different cooling water volumes based on the volume. The slag discharger body 10 can be made of durable steel.

[0028] The slag screening assembly 20 is used to screen the slag by volume. It is composed of multiple screening mechanisms 21 with different screening specifications. There are at least two screening mechanisms 21, and of course, three or more screening mechanisms 21 can be installed. The more screening mechanisms 21 are installed, the more detailed the slag screening is, and the better the targeted cooling spray control effect is later.

[0029] The screening mechanism 21 may be an existing vibrating mesh screening device, or other devices capable of screening slag.

[0030] The slag transfer assembly 30 includes multiple scale conveyors 31, which are used to transport slag toward the discharge port of the slag discharger body 10. The scale conveyor 31 is a common device in the prior art, and its specific structure, model and working mode are not described in detail.

[0031] The cooling spray assemblies 40 correspond one-to-one with the slab conveyors 31, and the amount of water sprayed by each cooling spray assembly 40 can be individually controlled. For large slag volumes, the slag contains more heat, and the cooling water temperature cannot easily reach the center of the slag. Therefore, a larger amount of spray water is required to cool the slag to the set temperature. For small slag volumes, the cooling water can cool it more easily, and a smaller amount of spray water is required.

[0032] Please also refer to Figure 1 and Figure 2 In some possible embodiments, the screening mechanism 21 includes a transmission chain 211, a chain drive unit, and a supporting rod 212. The transmission chain 211 is arranged in the slag discharge channel 11. The transmission chain 211 is horizontal and closed in a ring shape. The transmission chain 211 has two parallel straight segments and two arc segments. The two arc segments are respectively connected between the two straight segments, one of which is located below the slag discharge channel 12, and one of which is located above the scale conveyor 31 corresponding to the arc segment; the chain drive unit is used to drive the transmission chain 211 to circulate; a plurality of supporting rods 212 are evenly spaced on the transmission chain 211, one end of the supporting rod 212 is connected to the corresponding link of the transmission chain 211, and the other end extends in the horizontal direction, and the extension direction is perpendicular to the moving direction of the transmission chain 211; the spacing between the supporting rods 212 of the plurality of screening mechanisms 21 arranged from top to bottom decreases.

[0033] In this embodiment, the screening mechanism 21 includes a transmission chain 211, a chain drive unit, and supporting rods 212. The transmission chain 211 is formed by multiple iron chain links connected end to end. The transmission chain 211 is driven to rotate by the chain drive unit. The structure formed by the transmission chain 211 and the chain drive unit is similar to that of a chain conveyor in the prior art. Multiple supporting rods 212 are evenly spaced on the transmission chain 211. The gaps between the supporting rods 212 allow small volumes of slag to fall onto the next level of the screening mechanism 21.

[0034] The transmission chain 211 is waist-shaped, having two straight segments and two semicircular segments. A support rod 212 on one of the straight segments is located directly below the slag drop channel 12. The slag falls onto the support rod 212, and the small volume of slag leaks onto the next-level screening mechanism 21. The large volume of slag is supported by the support rod 212 and moves along the transmission chain 211 toward the slab conveyor 31. When the support rod 212 moves to the arc segment, the special shape of the arc segment increases the spacing between adjacent support rods 212, allowing the slag to leak from between the support rods 212 onto the slab conveyor 31 below and continue to be transported backward along the slab conveyor 31. The support rod 212 can be a circular or other rod-shaped component, and one end of the support rod 212 can be connected to the transmission chain 211 by fasteners, welding, or the like.

[0035] In some possible embodiments, considering that the supporting rod 212 is used to bear the weight of the slag and the impact of falling, in order to avoid the supporting rod 212 being suspended in the air and causing the bearing capacity to deteriorate, the slag discharge channel 11 is provided with a supporting platform on the side wall away from the transmission chain 211. The supporting platform is long and extends along the length of the straight segment. When the supporting rod 212 moves to the top of the supporting platform, the end of the supporting rod 212 is placed above the supporting platform. With this arrangement, one end of the supporting rod 212 is supported by the transmission chain 211, and the other end is supported by the supporting platform. This can prevent the supporting rod 212 from undergoing significant displacement when bearing the weight of the slag and the impact of falling, thus meeting the use requirements.

[0036] See also Figure 1 In some possible embodiments, the cooling spray assembly 40 includes a water tank, a water pump, a water pipe 41, a spray head 42 and a flow regulating valve. The water inlet end of the water pump is connected to the water tank, and the water outlet end of the water pump is connected to the water pipe 41. The flow regulating valve is arranged on the water pipe 41. The spray head 42 is located above the corresponding scale conveyor 31. The flow regulating valve is an electromagnetic valve, and the flow of cooling water spray is controlled by controlling the valve opening of the flow regulating valve.

[0037] See also Figure 3 In some possible embodiments, stoppers 311 are formed on both sides of the conveying surface of the scale conveyor 31. The stoppers 311 have drainage holes 312 running through the thickness of the stoppers 311. This can prevent water from accumulating on the surface of the scale conveyor 31 for a long time, reduce the amount of water absorbed by the slag, and prevent the slag from absorbing too much water and causing an increase in weight.

[0038] In some possible embodiments, the hazardous waste incineration rotary kiln dry slag discharger also includes an air cooling component, which is used to blow air toward the conveying surface of the scale conveyor 31. The air cooling component is located behind the cooling spray component 40 in the conveying direction of the scale conveyor 31. The air cooling component includes multiple cooling fans, and the multiple cooling fans are arranged at intervals along the conveying direction of the slag. The cooling fan can be arranged on the top or side wall of the slag discharge channel 11, and its air outlet direction can be perpendicular to the conveying surface of the scale conveyor 31 or inclined at a certain angle to the conveying surface, which is used to blow air to dissipate heat from the slag after spraying, while accelerating the evaporation of moisture in the slag and reducing the water content of the slag.

[0039] See also Figure 1 In some possible embodiments, a belt conveyor 50 is provided one-to-one at the discharge end of the scale plate conveyor 31, and an iron removal device 60 is provided above the belt conveyor 50. The iron removal device 60 is used to adsorb iron impurities in the slag. The iron removal device 60 can directly select the existing iron remover on the market, and there is no restriction on its specific specifications and models.

[0040] See also Figure 1In some possible embodiments, a weighing platform 70 is provided at the unloading end of the belt conveyor 50, and a ton bag 71 is provided on the weighing platform 70. The weighing platform 70 is connected to an audible and visual alarm device. The belt conveyor 50 conveys the cooled slag into the ton bag 71, and the weight of the slag is monitored in real time through the weighing platform 70. When the weight reaches a preset value, the audible and visual alarm emits sound and light to alert the operator.

[0041] See also Figure 1 In some possible embodiments, an air outlet 13 is provided at the top of the slag discharge channel 11 , and the air outlet 13 is connected to a negative pressure suction device for extracting the steam generated after the cooling water is sprayed.

[0042] See also Figure 1 and Figure 3 In some possible embodiments, a material dropping control component 80 is further provided in the slag dropping channel 12, and the material dropping control component 80 includes a rotating drum 81 and a second driving unit 82. The rotating drum 81 is horizontally arranged in the slag dropping channel 12, and the rotating drum 81 is cylindrical. The outer peripheral wall of the rotating drum 81 rotates with the inner wall of the slag dropping channel 12 and has a certain sealing performance. The interior of the rotating drum 81 is hollow and is divided into two centrally symmetrical accommodating cavities 811 by a partition 813. Two feed ports 812 are provided on the side wall of the rotating drum 81, and the feed ports 812 are connected to the accommodating cavities 811 in a one-to-one correspondence. When one of the feed ports 812 opens upward, the other feed port 812 opens downward; the second driving unit 82 is provided in the slag discharger body 10, and is used to drive the rotating drum 81 to rotate around its own horizontal axis.

[0043] In this embodiment, a dropping control component 80 is provided at the lower end of the slag dropping channel 12. On the one hand, the dropping control component 80 is used to slow down the falling speed of the slag to prevent the slag from exerting too much impact on the supporting rod 212, which may cause deformation of the supporting rod 212 or breakage of the slag. On the other hand, the dropping control component 80 can close the slag dropping channel 12 to a certain extent to prevent the steam generated by the cooling water spraying from entering the rotary kiln along the slag dropping channel 12 and affecting the normal combustion of the rotary kiln.

[0044] The material drop control assembly 80 includes a rotating drum 81 and a second drive unit 82. The second drive unit 82 and the first drive unit can be rotating drive components such as motors and hydraulic motors. The interior of the rotating drum 81 is divided into two cavities 811 by a partition 813. When one cavity 811 is in the upper position, it can hold fallen slag. The other cavity 811 is in the lower position, allowing the slag to be dumped downward. The second drive unit 82 drives the rotating drum 81 to rotate 180 degrees each time, alternating between the two cavities 811 in the material drop and the material drop states.

[0045] In the above embodiments, the description of each embodiment has its own focus. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0046] In this application, unless otherwise expressly specified or limited, terms such as "mounted," "connected," "connect," and "fixed" should be understood broadly. For example, they may refer to connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; and internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on specific circumstances.

[0047] In this application, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Moreover, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may simply mean that the first feature is lower in level than the second feature.

[0048] The above description is a specific embodiment of the present application, but the scope of protection of the present application is not limited thereto. Any person skilled in the art can easily conceive of various equivalent modifications or substitutions within the technical scope disclosed in this application, and such modifications or substitutions should be included in the scope of protection of this application. Therefore, the scope of protection of this application should be based on the scope of protection of the claims.

Claims

1. A dry slag discharger for hazardous waste incineration rotary kiln, characterized in that: include: The slag discharger body has a horizontal slag discharge channel and a vertical slag falling channel, the lower end of the slag falling channel is connected to the top of the slag discharge channel, and the upper end of the slag falling channel is connected to the slag discharge port of the rotary kiln; A slag screening assembly, comprising a plurality of screening mechanisms spaced apart from top to bottom in the slag discharge channel, wherein the material screening diameters of the plurality of screening mechanisms decrease from top to bottom, and each screening mechanism has a discharge end; a slag transfer assembly comprising a plurality of slab conveyors spaced apart from top to bottom within the slag discharge channel, wherein each of the discharging ends of the screening mechanism is provided with a corresponding slab conveyor, and wherein the conveying direction of the slab conveyors is parallel to the length direction of the slag discharge channel; and A plurality of cooling spray assemblies are arranged above the scale plate conveyor in a one-to-one correspondence.

2. The dry-type slag discharger for hazardous waste incineration rotary kiln according to claim 1, characterized in that: The screening mechanism comprises: A transmission chain is provided in the slag discharge channel, the transmission chain is in a horizontal and closed ring shape, and the transmission chain has two parallel straight segments and two arc segments, the two arc segments are respectively connected between the two straight segments, one of the straight segments is located below the slag discharge channel, and one of the arc segments corresponds to the top of the scale conveyor; A chain drive unit, configured to drive the transmission chain to circulate; and Multiple supporting rods are arranged at equal intervals on the transmission chain, one end of the supporting rod is connected to the corresponding link of the transmission chain, and the other end extends in the horizontal direction, and the extension direction is perpendicular to the moving direction of the transmission chain; the spacing between the supporting rods of the multiple screening mechanisms arranged from top to bottom decreases.

3. The dry-type slag discharger for hazardous waste incineration rotary kiln according to claim 2, characterized in that: The slag discharge channel is provided with a supporting platform on the side wall away from the transmission chain. The supporting platform is long and extends along the length direction of the straight segment. When the supporting rod moves to above the supporting platform, the end of the supporting rod is placed above the supporting platform.

4. The dry-type slag discharger for hazardous waste incineration rotary kiln according to claim 1, characterized in that: The cooling spray assembly includes a water tank, a water pump, a water pipe, a spray head and a flow regulating valve. The water inlet end of the water pump is connected to the water tank, the water outlet end of the water pump is connected to the water pipe, the flow regulating valve is arranged on the water pipe, and the spray head is located above the corresponding scale conveyor.

5. The dry-type slag discharger for hazardous waste incineration rotary kiln according to claim 1, characterized in that: Stop parts are respectively formed on both sides of the conveying surface of the scale plate conveyor, and the stop parts have drainage holes that penetrate through the thickness direction of the stop parts.

6. The dry-type slag discharger for hazardous waste incineration rotary kiln according to claim 1, characterized in that: The hazardous waste incineration rotary kiln dry slag discharger also includes an air cooling component, which is used to blow air to the conveying surface of the scale conveyor. The air cooling component is located behind the cooling spray component in the conveying direction of the scale conveyor.

7. The dry-type slag discharger for hazardous waste incineration rotary kiln according to claim 1, characterized in that: A belt conveyor is provided one-to-one with the discharging end of the scale conveyor, and an iron removal device is also provided above the belt conveyor. The iron removal device is used to absorb iron impurities in the slag.

8. The dry-type slag discharger for hazardous waste incineration rotary kiln according to claim 7, characterized in that: A weighing platform is provided at the unloading end of the belt conveyor, a ton bag is provided on the weighing platform, and the weighing platform is connected to an audible and visual alarm device.

9. The dry-type slag discharger for hazardous waste incineration rotary kiln according to claim 1, characterized in that: An air outlet is provided at the top of the slag discharge channel, and the air outlet is connected to a negative pressure suction device.

10. The dry-type slag discharger for hazardous waste incineration rotary kiln according to claim 9, characterized in that: The slag falling channel is also provided with a falling material control component, which includes: A rotating drum is horizontally arranged in the slag falling channel, the rotating drum is cylindrical, the interior of the rotating drum is hollow, and is divided into two centrally symmetrical accommodating chambers by a partition. The side wall of the rotating drum is provided with two feed ports, the feed ports are connected to the accommodating chambers in a one-to-one correspondence, and when one of the feed ports opens upward, the other feed port opens downward; and The second driving unit is provided on the slag discharger body and is used for driving the rotating drum to rotate around a horizontal axis.

Images