Cement kiln co-processing semi-solid hazardous waste pretreatment system

Abstract

The utility model provides a cement kiln co-processing semi-solid hazardous waste pretreatment system, and relates to the technical field of cement kiln co-processing, the cement kiln co-processing semi-solid hazardous waste pretreatment system comprises a crushing unit, a screening unit, a temporary storage unit, a transfer unit and a conveying unit, the crushing unit is used for crushing the semi-solid hazardous wastes, the screening unit is used for screening the semi-solid hazardous wastes crushed by the crushing unit, and the temporary storage unit is used for temporarily storing the semi-solid hazardous wastes meeting the requirements after being screened by the screening unit. Large or agglomerated waste is decomposed into small particles, then the waste with the proper size is screened out through the screening unit and enters the subsequent process, blocking of the subsequent conveying unit is avoided, through the arrangement of the crushing unit and the screening unit, the universality and applicability of the whole system are improved, semi-solid hazardous waste is effectively treated in time, and the service life of the semi-solid hazardous waste is prolonged. Hazardous wastes are prevented from being retained outside, and the risk of environmental pollution is reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of cement kiln co-processing, in particular to a cement kiln co-processing semi-solid hazardous waste pretreatment system. BACKGROUND

[0002] The cement kiln co-processing hazardous waste technology is a technology for harmless treatment of hazardous waste as alternative fuel or raw material in the cement production process. The high-temperature environment (usually about 1450 DEG C) in the cement kiln can cause pyrolysis, oxidation and other chemical reactions of organic harmful substances in the hazardous waste, and completely decompose them into harmless carbon dioxide, water and other substances.

[0003] In the process of cement kiln co-processing hazardous waste, the existing semi-solid hazardous waste treatment system is equipped with two sets of sludge bin pump equipment, and its operation mode is the combination of slide rack discharging and double-cylinder sludge pump. However, this equipment configuration has obvious limitations in actual application. When facing complex composition, impurities or sludge hazardous waste without specific mechanical pressure filtration treatment, the system cannot effectively respond, thereby greatly reducing its versatility and adaptability, causing a large number of hazardous waste that does not meet the receiving conditions to be retained outside and unable to be treated in time, increasing the risk of environmental pollution. SUMMARY

[0004] The purpose of the embodiment of the present application is to provide a cement kiln co-processing semi-solid hazardous waste pretreatment system which can solve the technical problems proposed in the background art.

[0005] The embodiment of the present application provides a cement kiln co-processing semi-solid hazardous waste pretreatment system, comprising:

[0006] A crushing unit for crushing semi-solid hazardous waste;

[0007] A screening unit for screening the semi-solid hazardous waste crushed by the crushing unit;

[0008] A temporary storage unit for temporarily storing the semi-solid hazardous waste meeting the requirements after screening by the screening unit;

[0009] A transfer unit for transferring the semi-solid hazardous waste in the temporary storage;

[0010] A conveying unit for conveying the semi-solid hazardous waste transferred by the transfer unit to a cement kiln for treatment.

[0011] Further, the crushing unit is a crusher, and the crushing unit is connected with a feeding unit for feeding semi-solid hazardous waste into the crushing unit.

[0012] Further, the feeding unit comprises a receiving pit for receiving the semi-solid hazardous waste transported by the transport vehicle, a climbing hopper with its upper end located in the receiving pit and its lower end located above the feeding port of the vibrating feeder, and the discharging port of the vibrating feeder is located above the feeding port of the crushing unit.

[0013] Further, the screening unit comprises a vibrating screen, a belt conveyor and an impurity storage tank, the vibrating screen is located below the discharging port of the crushing unit, the upper end of the belt conveyor is located below the impurity outlet of the vibrating screen, and the lower end of the belt conveyor is located above the impurity storage tank.

[0014] Further, the temporary storage unit is a stirring storage bin, and a screw feeder is arranged between the temporary storage unit and the vibrating screen, and the screw feeder is used for feeding the semi-solid hazardous waste meeting the requirements screened by the vibrating screen into the temporary storage unit.

[0015] Further, the transfer unit comprises a suction pump, a transfer pipeline and a transfer bin, the suction pump is arranged on the temporary storage unit, and the suction pump is connected with the transfer bin through the transfer pipeline.

[0016] Further, the transfer bin is provided with a stirring device and a hydraulic carriage, and the bottom of the transfer bin is provided with a double-screw feeding device, the stirring device is used for stirring the semi-solid hazardous waste in the transfer bin, and the hydraulic carriage cooperates with the double-screw feeding device to discharge.

[0017] Further, the conveying unit comprises a hydraulic piston pump, a first conveying pipeline, a slag remover, a second conveying pipeline, a first valve and a second valve, the hydraulic piston pump is connected with the discharging port of the transfer bin, the slag remover and the hydraulic piston pump are connected through the first conveying pipeline, the slag remover and the spray gun of the cement kiln are connected through the second conveying pipeline, the first valve is arranged on the first conveying pipeline, and the second valve is arranged on the second conveying pipeline.

[0018] Further, the utility model also comprises a waste liquid adding unit, and the waste liquid adding unit comprises a waste liquid tank, a conveying main pipe, a conveying branch pipe and a conveying pump, the conveying pump is connected with the waste liquid tank through the conveying main pipe, and the conveying pump is connected with the vibrating feeder, the crushing unit, the vibrating screen and the screw feeder through the conveying branch pipe.

[0019] The utility model discloses beneficial effects:

[0020] The utility model discloses a crushing unit is carried out to the semi -solid dangerous waste, and the big piece or the agglomerate waste is decomposed into smaller particle, then the waste of suitable size is screened into subsequent flow through the screening unit, avoids the blockage of subsequent conveying unit, through the setting of crushing unit and screening unit, improves the versatility and applicability of whole system, in time effective treatment semi -solid dangerous waste, avoids dangerous waste to stay outside, reduces the risk of environmental pollution. BRIEF DESCRIPTION OF DRAWINGS

[0021] In order to more clearly illustrate the technical scheme of the embodiments of the present application, the following will briefly introduce the drawings needed in the embodiments, it should be understood that the following drawings only show some embodiments of the present application, therefore should not be regarded as the limitation to the scope, for ordinary skilled person in the art, under the premise of not making the creative labor, can also obtain other related drawings according to these drawings.

[0022] Figure 1 For the process system diagram in some embodiments of the present application;

[0023] The reference signs are respectively:

[0024] 1, crushing unit;2, screening unit;21, vibrating screening machine;22, belt conveyor;23, impurity storage box;3, temporary storage unit;4, transfer unit;41, suction pump;42, transfer pipeline;43, transfer bin;5, conveying unit;51, hydraulic piston pump;52, first conveying pipe;53, deslagging device;54, second conveying pipe;55, first valve;56, second valve;6, feeding unit;61, receiving pit;62, climbing bucket;63, vibrating feeder;7, spiral feeder;8, stirring device;9, hydraulic slide;10, double-screw feeding device;11, waste liquid adding unit;111, waste liquid tank;112, conveying main pipe;113, conveying branch pipe;114, conveying pump. DETAILED DESCRIPTION

[0025] In order to make the purpose, technical scheme and advantage of the embodiments of the present application more clear, the following will combine the drawings in the embodiments of the present application, the technical scheme in the embodiments of the present application is clearly and completely described, obviously, the described embodiments are some embodiments of the present application, not all embodiments. The components of the embodiments of the present application described and shown in the drawings here can be arranged and designed in various different configurations.

[0026] Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the claimed application, but only represents selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by ordinary skilled person in the art without making the creative labor belong to the scope of protection of the present application.

[0027] It should be noted that like reference numerals and characters refer to like elements throughout the following description, and that the description can use orientation- or position-related terms such as "horizontal" or "vertical" or "left" or "right" or "up" or "down" or "top" or "bottom" or "front" or "back" or "horizontal" or "vertical" or "interior" or "exterior" or "lateral" or "longitudinal" or "transverse" or "proximal" or "distal" or "clockwise" or "counter-clockwise" or "inner" or "outer" or similar terms, which relate to the orientation or position of an object in a particular view or orientation of a description that is presented, or to the normal position, orientation, or disposition of that object when such description is used for a product's usual placement, use, or disposition, and which can be understood as referring to such normal position, orientation, or disposition, and which are used merely to facilitate the description and to more clearly set forth the limits of the application, but which are not intended to indicate that the application necessarily has a particular orientation or disposition, and which therefore do not limit the scope of the application to only the particular orientation or disposition being described in that particular view or orientation.

[0028] In the description of the application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship of the product when it is used, and are only used to facilitate the description of the application and simplify the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the application. In addition, the terms "first", "second", "third", and the like are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0029] In addition, the terms "horizontal", "vertical", "overhanging", and the like do not mean that the component must be absolutely horizontal or overhanging, but can be slightly inclined. For example, "horizontal" only means that it is more horizontal relative to "vertical", and does not mean that the structure must be completely horizontal, but can be slightly inclined.

[0030] In the description of the application, it should also be noted that, unless otherwise explicitly specified and limited, the terms "provided", "mounted", "connected", "linked" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be internal communication of two elements. For those skilled in the art, the specific meaning of the above terms in the application can be understood according to the specific circumstances. Specific embodiments:

[0032] As Figure 1As shown, the cement kiln co-processing semi-solid hazardous waste pretreatment system provided by the present application comprises a crushing unit 1, a screening unit 2, a temporary storage unit 3, a transfer unit 4 and a conveying unit 5. The crushing unit 1 is used for crushing semi-solid hazardous waste. The screening unit 2 is used for screening the semi-solid hazardous waste crushed by the crushing unit 1. The temporary storage unit 3 is used for temporarily storing the semi-solid hazardous waste meeting the requirements after screening by the screening unit 2. The transfer unit 4 is used for transferring the semi-solid hazardous waste in the temporary storage. The conveying unit 5 is used for conveying the semi-solid hazardous waste transferred by the transfer unit 4 to the cement kiln for processing. The semi-solid hazardous waste is crushed by the crushing unit 1 to break down large blocks or agglomerated waste into smaller particles. Then, the waste of appropriate size is screened by the screening unit 2 to enter the subsequent process, thereby avoiding the blockage of the subsequent conveying unit 5. The crushing unit 1 and the screening unit 2 are provided to improve the universality and applicability of the entire system, timely and effectively process the semi-solid hazardous waste, avoid the retention of hazardous waste outside, and reduce the risk of environmental pollution.

[0033] As shown in Figure 1 The crushing unit 1 is a crusher. The crushing unit 1 is connected with a feeding unit 6 for feeding the semi-solid hazardous waste into the crushing unit 1. The presence of the feeding unit 6 can realize accurate control of the semi-solid hazardous waste feeding. The semi-solid hazardous waste can be conveyed to the crushing unit 1 at a stable and uniform speed according to the processing capacity and working state of the crusher.

[0034] As shown in Figure 1 The feeding unit 6 comprises a receiving pit 61, a climbing bucket 62 and a vibrating feeder 63. The receiving pit 61 is used for receiving the semi-solid hazardous waste transported by a transport vehicle. The feeding end of the climbing bucket 62 is located in the receiving pit 61. The discharging end of the climbing bucket 62 is located above the feeding port of the vibrating feeder 63. The discharging port of the vibrating feeder 63 is located above the feeding port of the crushing unit 1. The receiving pit 61 is provided to facilitate the reception of the semi-solid hazardous waste transported by the transport vehicle, thereby providing a specific unloading area for the transport vehicle. This can effectively avoid the scattering and pollution of the hazardous waste during the unloading process. The vibrating function of the vibrating feeder 63 can realize the uniform distribution and loosening of the semi-solid hazardous waste above the feeding port of the crushing unit 1. For some hazardous waste that may have caking phenomenon, the vibration can effectively break it up, thereby avoiding the uneven feeding from the receiving pit 61 to the climbing bucket 62, then to the vibrating feeder 63, and finally to the crushing unit 1. The entire process is closely connected to form an efficient and orderly feeding system, thereby ensuring the smooth flow of the semi-solid hazardous waste in the pretreatment system.

[0035] As shown in Figure 1As shown, the screening unit 2 includes a vibrating screening machine 21, a belt conveyor 22 and an impurity storage tank 23, the vibrating screening machine 21 is located below the discharge port of the crushing unit 1, the feeding end of the belt conveyor 22 is located below the impurity outlet of the vibrating screening machine 21, which can stably convey the screened impurities to the discharge end, and the discharge end of the belt conveyor 22 is located above the impurity storage tank 23, so that the impurities can be collected and stored.

[0036] As shown in Figure 1 As shown, the temporary storage unit 3 is a stirring storage bin, a screw feeder 7 is arranged between the temporary storage unit 3 and the vibrating screening machine 21, the screw feeder 7 is used to feed the semi-solid hazardous waste meeting the requirements screened by the vibrating screening machine 21 into the temporary storage unit 3, and the temporary storage unit 3 adopts a stirring storage bin. For the semi-solid hazardous waste meeting the requirements screened by the vibrating screening machine 21, the stirring function can prevent the material from settling or caking, especially for some semi-solid hazardous waste containing multiple components and which may stratify or agglomerate in a static state, stirring can keep it in a uniform physical state, which not only facilitates subsequent transfer and conveying, but also ensures that the material entering the cement kiln is stable in nature, ensuring that the treatment process in the cement kiln is stable and efficient. The screw feeder 7 can stably feed the screened semi-solid hazardous waste meeting the requirements according to the storage capacity and feeding speed requirements of the stirring storage bin, avoiding adverse effects on the stirring storage bin due to too fast or too slow feeding, such as overloading and overflow of the storage bin due to too fast feeding, and affecting the working efficiency of the entire pretreatment system due to too slow feeding.

[0037] As shown in Figure 1 As shown, the transfer unit 4 includes a suction pump 41, a transfer pipeline 42 and a transfer bin 43, the suction pump 41 is arranged on the temporary storage unit 3, the suction pump 41 is connected with the transfer bin 43 through the transfer pipeline 42, and the suction pump 41 is arranged on the temporary storage unit 3, which can quickly extract the semi-solid hazardous waste from the stirring storage bin (temporary storage unit 3) by using its suction capacity. The transfer bin 43 serves as an intermediate storage point for material transfer and plays a buffering role.

[0038] As shown in Figure 1As shown, the transfer bin 43 is provided with a stirring device 8 and a hydraulic slide 9, and the bottom of the transfer bin 43 is provided with a double-screw feeding device 10. The stirring device 8 is used to stir the semi-solid hazardous waste in the transfer bin 43, and the hydraulic slide 9 cooperates with the double-screw feeding device 10 to discharge the material. During the storage of the transfer bin 43, the semi-solid hazardous waste may be stratified or caked due to long-term standing. The stirring device 8 can keep the material uniform in physical and chemical properties through continuous or periodic stirring action. The hydraulic slide 9 can adjust its position and pressure to apply appropriate pressure to the material at the bottom of the transfer bin 43, so that the material can be stably discharged according to the conveying capacity of the double-screw feeding device 10. The double-screw feeding device 10 itself advances the material through the rotation of the screw blades, and when it cooperates with the hydraulic slide 9, it can more accurately control the discharging speed and amount of the material.

[0039] As shown in Figure 1 The conveying unit 5 includes a hydraulic piston pump 51, a first conveying pipe 52, a slag remover 53, a second conveying pipe 54, a first valve 55 and a second valve 56. The hydraulic piston pump 51 is connected with the discharge port of the transfer bin 43. The slag remover 53 and the hydraulic piston pump 51 are connected through the first conveying pipe 52. The slag remover 53 and the lance of the cement kiln are connected through the second conveying pipe 54. The first valve 55 is arranged on the first conveying pipe 52, and the second valve 56 is arranged on the second conveying pipe 54. The hydraulic piston pump 51 is connected with the discharge port of the transfer bin 43, which can provide stable and powerful power for the conveying of the semi-solid hazardous waste. For semi-solid material, the high-pressure output of the hydraulic piston pump 51 can overcome the resistance of the material in the pipeline, ensuring that the material is smoothly conveyed from the transfer bin 43 to the subsequent equipment. The existence of the first valve 55 and the second valve 56 realizes the accurate control of the material conveying path and flow. By adjusting the opening of the valve, the conveying speed and flow of the material at different stages can be flexibly controlled according to actual needs. After the semi-solid hazardous waste is subjected to the previous pretreatment process, some impurities may still remain. The slag remover 53 can separate these impurities from the material to avoid the impurities entering the cement kiln.

[0040] As shown in Figure 1As shown, the cement kiln co-processing semi-solid hazardous waste pretreatment system provided by the application further comprises a waste liquid adding unit 11, the waste liquid adding unit 11 comprises a waste liquid tank 111, a conveying main pipe 112, a conveying branch pipe 113 and a conveying pump 114, the conveying pump 114 is connected with the waste liquid tank 111 through the conveying main pipe 112, and the conveying pump 114 is connected with the vibrating feeder 63, the crushing unit 1, the vibrating screening machine 21 and the screw feeder 7 through the conveying branch pipe 113. The waste liquid is added at the vibrating feeder 63, and the semi-solid hazardous waste before entering the crushing unit 1 can be pretreated. For some semi-solid hazardous waste with high hardness and dryness, adding an appropriate amount of waste liquid can reduce the hardness and increase the humidity of the material, so that the material is more easily crushed. The semi-solid hazardous waste entering the crushing unit 1 is further optimized in crushing effect under the action of the waste liquid. At the vibrating screening machine 21, the waste liquid can make the crushed semi-solid hazardous waste maintain a certain humidity and fluidity, prevent fine particles from agglomerating due to excessive dryness, and improve the accuracy and efficiency of screening. Adding the waste liquid at the screw feeder 7 can make the semi-solid hazardous waste maintain good fluidity and uniformity during conveying, which helps the screw feeder 7 more stably and accurately convey the material to the temporary storage unit 3, avoids the problems of poor feeding or blockage caused by dry or uneven material, and guarantees smooth circulation of the material in the pretreatment system.

[0041] The above is only the preferred embodiment of the application and is not used to limit the application. The application can have various changes and variations for those skilled in the art. Any modification, equivalent replacement, improvement, etc. within the spirit and principle of the application shall be included in the protection scope of the application.

Claims

1. A cement kiln co-processing semi-solid hazardous waste pretreatment system, characterized in that, The application relates to a hazardous waste treatment system. The application comprises: a crushing unit for crushing semi-solid hazardous waste; a screening unit for screening the semi-solid hazardous waste crushed by the crushing unit; a temporary storage unit for temporarily storing the semi-solid hazardous waste meeting the requirements after being screened by the screening unit; a transfer unit for transferring the semi-solid hazardous waste in the temporary storage unit; 2. The cement kiln co-processing semi-solid hazardous waste pretreatment system according to claim 1, characterized in that: a conveying unit for conveying the semi-solid hazardous waste transferred by the transfer unit to a cement kiln for treatment.

3. A cement kiln co-processing semi-solid hazardous waste pre-treatment system as claimed in claim 2, wherein: The crushing unit is a crusher, and a feeding unit for feeding semi-solid hazardous waste into the crushing unit is connected to the crushing unit.

4. The cement kiln co-processing semi-solid hazardous waste pretreatment system according to claim 3, characterized in that: The feeding unit comprises a receiving pit for receiving semi-solid hazardous waste delivered by a transport vehicle, a climbing bucket with a feeding end in the receiving pit and a discharging end above a feeding port of a vibrating feeder, and the vibrating feeder has a discharging port above a feeding port of the crushing unit.

5. The cement kiln co-processing semi-solid hazardous waste pretreatment system according to claim 4, characterized in that: The screening unit comprises a vibrating screen, a belt conveyor and an impurity storage tank, the vibrating screen is located below the discharging port of the crushing unit, the feeding end of the belt conveyor is located below an impurity outlet of the vibrating screen, and the discharging end of the belt conveyor is located above the impurity storage tank.

6. A cement kiln co-processing semi-solid hazardous waste pre-treatment system as claimed in claim 5, wherein: The temporary storage unit is a stirring storage bin, and a screw feeder is arranged between the temporary storage unit and the vibrating screen, the screw feeder is used for feeding the semi-solid hazardous waste meeting the requirements screened by the vibrating screen into the temporary storage unit.

7. A cement kiln co-processing semi-solid hazardous waste pre-treatment system as claimed in claim 6, wherein: The transfer unit comprises a suction pump, a transfer pipeline and a transfer bin, the suction pump is arranged on the temporary storage unit, and the suction pump is connected with the transfer bin through the transfer pipeline.

8. A cement kiln co-processing semi-solid hazardous waste pre-treatment system as claimed in claim 7, wherein: The transfer bin is provided with a stirring device and a hydraulic carriage, and the bottom of the transfer bin is provided with a double-screw feeding device, the stirring device is used for stirring the semi-solid hazardous waste in the transfer bin, and the hydraulic carriage cooperates with the double-screw feeding device to discharge.

9. A cement kiln co-processing semi-solid hazardous waste pre-treatment system as claimed in claim 8, wherein: The conveying unit comprises a hydraulic piston pump, a first conveying pipeline, a slag remover, a second conveying pipeline, a first valve and a second valve, the hydraulic piston pump is connected with a discharging port of the transfer bin, the slag remover and the hydraulic piston pump are connected through the first conveying pipeline, the slag remover and a lance of a cement kiln are connected through the second conveying pipeline, the first valve is arranged on the first conveying pipeline, and the second valve is arranged on the second conveying pipeline. The application further comprises a waste liquid adding unit, and the waste liquid adding unit comprises a waste liquid tank, a conveying main pipeline, a conveying branch pipeline and a conveying pump, the conveying pump is connected with the waste liquid tank through the conveying main pipeline, and the conveying pump is connected with the vibrating feeder, the crushing unit, the vibrating screen and the screw feeder through the conveying branch pipeline.

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