High-sulfur and high-halogen hazardous waste feeding and conveying system and hazardous waste incineration system

Abstract

The present invention discloses a high-sulfur and high-halogen hazardous waste feeding and conveying system and a hazardous waste incineration system. The high-sulfur and high-halogen hazardous waste feeding and conveying system includes: a crushing device for crushing the material to be crushed to form crushed material; a material pit, which includes a bulk material area and a crushed material area. The bulk material area is used for storing materials that do not need to be crushed, and the crushed material area is used for storing the crushed material; a first feeding and conveying device for conveying the materials that do not need to be crushed to the incinerator; and a second feeding and conveying device for conveying the crushed material to the incinerator. According to the present invention, it is avoided that the ton bags and woven bags are unnecessarily crushed and wound around the crusher, resulting in shutdown. At the same time, the two types of materials are respectively conveyed by two sets of feeding and conveying devices, which can cooperate with each other to improve the feeding efficiency, and can also be used as backups for each other under abnormal conditions, reducing the shutdown loss.

Description

Technical Field

[0001] The present invention relates to the field of waste disposal, and in particular to a high-sulfur, high-halogen hazardous waste feeding and conveying system and a hazardous waste incineration system. Background Art

[0002] According to the National List of Hazardous Wastes, there are 46 categories and 479 types of hazardous wastes. Each batch of materials has different properties. Whether in terms of material composition, packaging form or physical form, there are various differences in hazardous wastes.

[0003] When handling hazardous solid waste, incineration companies typically use a rotary shear shredder for crushing. The crushed material is then lifted by a crane grab bucket onto a chain conveyor, which then delivers it to a push-rod loading system. Hazardous waste comes in a variety of packaging options, including drums, plastic drums, ton bags, and woven bags. These ton bags and woven bags do not break down well in the shredder, often forming long strips that can become entangled in the shredder during crushing, causing downtime.

[0004] In order to solve the problems in the prior art, the present invention provides a safe and reliable high-sulfur, high-halogen hazardous waste feeding and conveying system and a hazardous waste incineration system. Summary of the Invention

[0005] The Summary of the Invention introduces a series of simplified concepts that will be further described in the Detailed Description of the Invention. The Summary of the Invention is not intended to limit the key features and essential features of the claimed technical solution, nor is it intended to determine the scope of protection of the claimed technical solution.

[0006] In order to solve the problems in the prior art, the present invention provides a high-sulfur, high-halogen hazardous waste feeding and conveying system, comprising:

[0007] Crushing device, used to crush the material to be crushed to form crushed material;

[0008] A material pit, comprising a bulk material area and a crushed material area, wherein the bulk material area is used to store materials that do not need to be crushed, and the crushed material area is used to store crushed materials;

[0009] a first feeding and conveying device, for conveying the material that does not need to be crushed to the incinerator; and

[0010] The second feeding and conveying device is used to convey the crushed material to the incinerator.

[0011] Exemplarily, the first feeding device comprises a screw conveyor.

[0012] Exemplarily, the second feeding and conveying device includes a push rod loading device.

[0013] Exemplarily, the second feeding device includes a packaging elevator for lifting and transporting the packaging of the material that does not need to be crushed to the push rod loading device.

[0014] Exemplarily, the screw conveyor includes a shaftless double screw conveyor and / or a shaftless single screw conveyor.

[0015] Exemplarily, the second feeding and conveying device further includes a chain conveyor for conveying the crushed material to the push rod loading device, and the push rod loading device conveys the crushed material to the incinerator.

[0016] Exemplarily, the second feeding and conveying device further includes a cooling device for cooling the push rod loading device.

[0017] Exemplarily, the second feeding and conveying device further includes a fire extinguishing device for extinguishing backfire generated in the push rod loading device.

[0018] Exemplarily, it further includes a grab bucket, which grabs the material that does not need to be crushed in the bulk material area and sends it to the first conveying device, and / or the grab bucket grabs the crushed material in the crushed material area and sends it to the second conveying device.

[0019] The present invention also provides a hazardous waste incineration system, comprising the high-sulfur, high-halogen hazardous waste feeding and conveying system as described above.

[0020] According to the high-sulfur, high-halogen hazardous waste feeding and conveying system of the present invention, the materials that do not need to be crushed in ton bags and woven bags are stored and conveyed separately from the materials that need to be crushed in iron barrels and plastic barrels, so as to avoid unnecessary crushing of ton bags and woven bags and entanglement of crushers, resulting in shutdown. At the same time, the two types of materials are conveyed separately by two sets of feeding and conveying devices, which can cooperate with each other to improve feeding efficiency. They can also serve as backup for each other under abnormal working conditions, reducing downtime losses caused by system failures of the feeding and conveying system. According to the hazardous waste incineration system of the present invention, due to the above-mentioned feeding and conveying devices that cooperate with each other, continuous, uniform and stable feeding is achieved, which avoids the occurrence of unstable incineration conditions, stabilizes the incineration conditions, and avoids problems such as large temperature fluctuations, deflagration, and excessive CO. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The following drawings of the present invention are incorporated herein as part of the present invention for understanding the present invention. The drawings show embodiments of the present invention and the description thereof is used to explain the principle of the present invention.

[0022] In the attached figure:

[0023] Figure 1 The figure is a schematic structural diagram of a high-sulfur and high-halogen hazardous waste feeding and conveying system according to an embodiment. Detailed implementation manners

[0024] In the following description, numerous specific details are given to provide a more thorough understanding of the present invention. However, it is obvious to those skilled in the art that the present invention can be implemented without one or more of these details. In other instances, some well-known technical features are not described to avoid confusion with the present invention.

[0025] To thoroughly understand the present invention, a detailed description will be presented in the following to illustrate the high-sulfur and high-halogen hazardous waste feeding and conveying system and the hazardous waste incineration system of the present invention. Obviously, the implementation of the present invention is not limited to the specific details familiar to those skilled in the environmental protection field. The preferred embodiments of the present invention are described in detail below. However, in addition to these detailed descriptions, the present invention can also have other implementation manners.

[0026] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present invention. As used herein, unless the context clearly indicates otherwise, the singular forms are also intended to include the plural forms. In addition, it should also be understood that when the terms "comprise" and / or "include" are used in this specification, they specify the presence of the described features, wholes, steps, operations, elements, and / or components, but do not exclude the presence or addition of one or more other features, wholes, steps, operations, elements, components, and / or their combinations.

[0027] Now, exemplary embodiments according to the present invention will be described in more detail with reference to the accompanying drawings. However, these exemplary embodiments can be implemented in many different forms and should not be construed as being limited only to the embodiments set forth herein. It should be understood that these embodiments are provided so that the disclosure of the present invention is thorough and complete, and the concept of these exemplary embodiments is fully conveyed to those of ordinary skill in the art. In the drawings, the thickness of layers and regions is exaggerated for clarity, and the same reference numerals are used to denote the same elements, and thus their description will be omitted.

[0028] When incineration enterprises handle solid hazardous waste, they generally first use a rotary shear crusher for crushing. The crushed materials are lifted to a chain conveyor by a traveling grab bucket and then sent to a push rod feeding system by the chain conveyor. Since hazardous waste materials have various packaging methods, such as iron drums, plastic drums, ton bags, woven bags, etc., among which ton bags and woven bags cannot be well crushed in the crusher and often remain in long strips, which will entangle the crusher during the crushing process, resulting in shutdown. At the same time, when there are a large number of ton bags, they may not be able to be crushed. And for high-sulfur and high-halogen hazardous waste, the proportion of materials that need to be crushed is relatively small. Using a crusher for crushing will reduce the efficiency of the material conveying system, resulting in high energy consumption and high machine maintenance frequency.

[0029] To solve the problems in the prior art, the present invention provides a high-sulfur and high-halogen hazardous waste feeding and conveying system, including:

[0030] A crushing device for crushing the materials to be crushed to form crushed materials

[0031] A material pit, the material pit includes a bulk material area and a crushed material area. The bulk material area is used to store materials that do not need to be crushed, and the crushed material area is used to store the crushed materials;

[0032] A first feeding and conveying device for conveying the materials that do not need to be crushed to the incinerator; and

[0033] A second feeding and conveying device for conveying the crushed materials to the incinerator.

[0034] See Figure 1 , which shows a schematic structural diagram of a high-sulfur and high-halogen hazardous waste feeding and conveying system according to the present invention.

[0035] See Figure 1 , a high-sulfur and high-halogen hazardous waste feeding and conveying system according to the present invention includes a material pit 1. The material pit 1 includes a crushed material area 101 and a bulk material area 102. The crushed material area 101 is used to store the crushed materials, and the bulk material area 102 is used to store the materials that do not need to be crushed.

[0036] When high-sulfur and high-halogen hazardous waste is transported to a waste incineration plant, it often adopts packaging forms such as iron drums, plastic drums, ton bags, woven bags, etc. Among them, materials in packaging forms such as ton bags and woven bags do not need to be crushed, and materials in packaging forms such as iron drums and plastic drums need to be processed.

[0037] Materials with packaging that do not need to be crushed, such as ton bags and woven bags, are transported to the material pit by a material transport vehicle and directly poured into the bulk material pit for storage after unpacking. For materials in the form of iron drums, plastic drums or large pieces, they need to be crushed first. After being crushed by a crusher, they are stored in the crushed material pit.

[0038] According to the present invention, a high-sulfur, high-halogen hazardous waste feeding and conveying system further comprises a crusher ( Figure 1 (not shown) for crushing materials that are packaged in iron barrels or plastic barrels.

[0039] According to the present invention, a high-sulfur, high-halogen hazardous waste feeding and conveying system further includes a first feeding and conveying device for conveying materials that do not need to be crushed to the incinerator.

[0040] According to the present invention, a high-sulfur, high-halogen hazardous waste feeding and conveying system further includes a second feeding and conveying device for conveying the crushed material to the incinerator, and the second feeding and conveying device includes a push rod loading device.

[0041] According to the high-sulfur and high-halogen hazardous waste feeding and conveying system of the present invention, the materials that do not need to be crushed in ton bags and woven bags are stored and conveyed separately from the materials that need to be crushed in iron drums and plastic drums, so as to avoid unnecessary crushing of ton bags and woven bags and entanglement of crushers, resulting in shutdown. At the same time, the two feeding methods can cooperate with each other to improve feeding efficiency, and can also serve as backup for each other under abnormal working conditions, thereby reducing shutdown losses caused by system failures of the feeding and conveying system.

[0042] According to the present invention, a high-sulfur, high-halogen hazardous waste feeding and conveying system includes a grab bucket, which grabs the uncrushed material in the bulk material area to the first conveying device, and / or the grab bucket grabs the crushed material in the crushed material area to the second conveying device.

[0043] Exemplarily, the first feeding and conveying device includes a screw conveyor. The first feeding and conveying device conveys materials that do not need to be crushed to the incinerator for incineration. The materials that do not need to be crushed include powdered materials, which are conveyed by the screw conveyor. The screw conveyor has good sealing performance and avoids environmental pollution during the material transportation process.

[0044] like Figure 1 As shown, the material in the bulk material area 102 is grabbed by the crane grab 103 and lifted into the hopper 2, and then conveyed to the screw conveyor (including the shaftless double screw conveyor 3 and the shaftless single screw conveyor 4) through the hopper 2 and transported to the incinerator 10 for incineration.

[0045] The screw conveyor is a continuous and stable hazardous material conveying equipment that can effectively improve the combustion conditions in the rotary kiln and the secondary combustion chamber.

[0046] In the present invention, a combination of a shaftless twin-screw conveyor 3 and a shaftless single-screw conveyor 4 is used for conveying. The shaftless twin-screw conveyor 3 has high conveying efficiency, good sealing performance, and stable and reliable operation. The shaftless single-screw conveyor 4 has a sealing effect due to the presence of material at the rear end, which can provide heat insulation and prevent tempering.

[0047] For example, the bulk material area 102 further includes a mixing and blending device for mixing and blending bulk materials that do not need to be crushed and then transporting them to the incinerator.

[0048] In one example according to the present invention, Figure 1 As shown, in order to prevent the outer shell of the shaftless single screw conveyor 4 from being too high due to the heat transfer of the rotary kiln, a cooling fan 5 is used for cooling. The cooling fan 5 obtains air from the atmosphere (such as Figure 1 The outer shell of the shaftless single screw conveyor 4 is cooled, and the cooled air is returned to the atmosphere (as shown in FIG. Figure 1 (shown in B).

[0049] In one example according to the present invention, materials that do not need to be crushed and are packaged in ton bags or woven bags are moved to a material pit by a material transport vehicle, and are manually unpacked by staff and poured into a bulk material pit for storage.

[0050] In one example according to the present invention, materials that do not need to be crushed and are packaged in ton bags or woven bags are moved to a material pit by a material transport vehicle, and are automatically unpacked by an unpacking device and poured into a bulk material pit for storage.

[0051] It should be understood that the materials packaged in ton bags and woven bags are unpacked manually by staff or automatically by unpacking devices, which are only exemplary. Those skilled in the art can set any unpacking method for unpacking.

[0052] In one example according to the present invention, materials packaged in ton bags and woven bags that do not require crushing are unpacked and then transported to an incinerator for incineration via a second feed conveyor. If the first feed conveyor is a screw conveyor, which is unsuitable for transporting ton bags and woven bags because they can entangle the conveying blades or shaft of the screw conveyor, the second feed conveyor is used to transport the ton bags and woven bags to the incinerator, ensuring that all high-sulfur, high-halogen hazardous waste and its packaging delivered to the incinerator are processed.

[0053] Continue to see below Figure 1 The second feeding and conveying device according to the present invention is exemplarily introduced.

[0054] Exemplarily, the second feed conveying device further includes a chain plate conveyor for conveying the crushed material to the push rod feeding device, and the push rod feeding device conveys the crushed material to the incinerator.

[0055] Exemplarily, the second feed conveying device includes a push rod feeding device.

[0056] As Figure 1 shown, the crushed material in the crushing material area 101 is lifted by the grab 103 to the chain plate conveyor 6 and conveyed to the incinerator 10 through the push rod feeding device 8. Since the crushed material includes hard blocks, etc., the push rod feeding device uses the form of a push rod to convey the material, and can smoothly push the hard blocks into the incinerator.

[0057] However, the push rod feeding device is an intermittent material conveying method with a long interval period, and the amount of material entering the rotary kiln each time is relatively large, which easily leads to unstable incineration conditions, such as large temperature fluctuations, deflagration, and excessive CO during the incineration process. In the present invention, the first feed conveying device including a screw conveyor is combined with the second feed conveying device including a push rod feeding device. Effectively, the screw conveyor continuously inputs the material into the incinerator, avoiding the occurrence of unstable incineration caused by intermittent feeding in the case of using only the push rod feeding device, making the incineration conditions stable, and avoiding problems such as large temperature fluctuations, deflagration, and excessive CO.

[0058] According to an example of the present invention, after unpacking the materials packed in ton bags and woven bags that do not need to be crushed, the packages are input into the incinerator through the second feed conveying device for incineration. Among them, the second feed conveying device includes a package lifter for lifting and conveying the packages of the materials that do not need to be crushed to the push rod feeding device. As Figure 1 shown, the packages of the materials that do not need to be crushed (as Figure 1 shown in C) are lifted by the package lifter 7 to the push rod feeding device 8 and pushed to the incinerator 10 through the push rod feeding device 8 for incineration.

[0059] Since the push rod feeding device is in an intermittent operation state and the heat radiation in the chute is relatively large, it is easy to generate working conditions such as backfire or high temperature. In an example according to the present invention, the second feed conveying device further includes a cooling device for cooling the push rod feeding device.

[0060] Exemplarily, the cooling device includes a cooling fan. As Figure 1 shown, a cooling fan 9 is provided to cool the housing of the push rod feeding device 8. The cooling fan 9 obtains cooling air from the atmosphere (as Figure 1 shown in D) to cool the housing of the push rod feeding device 8 and then conveys the air to the atmosphere (as Figure 1as shown in E in the Chinese version).

[0061] In an example according to the present invention, the second feeding and conveying device further includes a fire extinguishing device for extinguishing the flashback generated in the pusher feeding device. Exemplarily, as Figure 1 shown, the fire extinguishing device includes a steam fire extinguishing device 11 which sprays steam into the pusher feeding device 8 to extinguish the flashback in the pusher feeding device 8, thereby avoiding a fire in the pusher feeding device 8.

[0062] Embodiment 2

[0063] The present invention also provides a hazardous waste incineration system, including the high-sulfur and high-halogen hazardous waste feeding and conveying system as described in Embodiment 1.

[0064] Since the high-sulfur and high-halogen hazardous waste feeding and conveying system according to the present invention separately stores and conveys the materials that do not need to be crushed in the ton bags and woven bags and the materials that need to be crushed in the iron drums and plastic drums, it avoids unnecessary crushing of the ton bags and woven bags and entanglement of the crusher, resulting in shutdown. At the same time, the two materials are conveyed by two sets of feeding and conveying devices respectively, which can cooperate with each other to improve the feeding efficiency and can also be used as spares for each other under abnormal conditions, reducing the shutdown loss caused by system failures of the feeding and conveying system. Therefore, the hazardous waste incineration system according to the present invention realizes continuous, uniform and stable feeding, avoids the occurrence of unstable incineration, stabilizes the incineration conditions, and avoids problems such as large temperature fluctuations, deflagration, and excessive CO.

[0065] The present invention has been described through the above embodiments. However, it should be understood that the above embodiments are only for the purpose of illustration and example, and are not intended to limit the present invention to the scope of the described embodiments. In addition, those skilled in the art can understand that the present invention is not limited to the above embodiments, and more variations and modifications can be made according to the teachings of the present invention, and these variations and modifications all fall within the scope of protection required by the present invention. The scope of protection of the present invention is defined by the appended claims and their equivalent scope.

Claims

1. A high-sulfur, high-halogen hazardous waste feeding and conveying system, characterized in that: include: Crushing device, used for crushing the material to be crushed to form crushed material, the material to be crushed includes materials packaged in iron drums and / or plastic drums; A material pit, comprising a bulk material area and a crushed material area. The bulk material area is used to store materials that do not require crushing, including materials packaged in ton bags and / or woven bags. The crushed material area is used to store crushed materials. The materials that do not require crushing are poured into the bulk material area after being unpacked. a first feeding and conveying device, for conveying the material that does not need to be crushed to the incinerator, wherein the first feeding and conveying device comprises a screw conveyor, wherein the screw conveyor comprises a shaftless double screw conveyor and a shaftless single screw conveyor; and a second feeding and conveying device for conveying the crushed material to the incinerator, the second feeding and conveying device comprising a packaging elevator, a push rod loading device, and a cooling device; the packaging elevator is used to lift and convey the package of the material that does not need to be crushed to the push rod loading device; the cooling device is used to cool the push rod loading device; Wherein, the screw conveyor is used in conjunction with the push rod loading device to continuously input materials into the incinerator.

2. The high-sulfur and high-halogen hazardous waste feeding and conveying system according to claim 1, wherein, The second feeding and conveying device further includes a chain conveyor for conveying the crushed material to the push rod loading device, and the push rod loading device conveys the crushed material to the incinerator.

3. The high-sulfur and high-halogen hazardous waste feeding and conveying system according to claim 1 is characterized in that: The second feeding and conveying device also includes a fire extinguishing device for extinguishing backfire generated in the push rod loading device.

4. The high-sulfur and high-halogen hazardous waste feeding and conveying system according to claim 1, characterized in that: It also includes a grab bucket, which grabs the material that does not need to be crushed in the bulk material area and sends it to the first feeding and conveying device, and / or the grab bucket grabs the crushed material in the crushed material area and sends it to the second feeding and conveying device.

5. A hazardous waste incineration system, characterized in that, It comprises the high-sulfur, high-halogen hazardous waste feeding and conveying system as described in any one of claims 1-4.

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