Material conveying system

Abstract

The utility model discloses a material conveying system which comprises a conveying pipeline, the conveying pipeline is used for conveying materials, and a first connector, a second connector and an output end are sequentially arranged on the conveying pipeline in the material conveying direction; the output end of the steam pipeline is communicated with the conveying pipeline through the first connector; the output end of the nitrogen pipeline is communicated with the conveying pipeline through the second connector; according to the material conveying system, semi-solid materials can be conveyed and finally enter the rotary kiln to be subjected to harmless treatment, the semi-solid material treatment efficiency is greatly improved, the treatment capacity is increased, the structural arrangement is reasonable, the system structure is optimized, the production change cost is saved, and the material conveying system is suitable for industrial production. The production environment is improved and the operation is convenient.

Description

Technical Field

[0001] This application is used in the technical field of hazardous waste treatment, and particularly relates to a material conveying system. Background Art

[0002] Hazardous waste refers to waste with one or more hazardous characteristics such as corrosivity, toxicity, flammability, reactivity, and infectivity, as well as waste that does not exclude having the above hazardous characteristics, existing in solid, semi-solid, and liquid forms, with toxicity, pollution, and danger. Among them, semi-solid hazardous waste accounts for about 55% of the total amount. Currently, the main disposal method for semi-solid hazardous waste is incineration treatment, and there are various ways to enter the rotary kiln, including combined feeding of chain conveyor and push rod, combined feeding of side door and push rod, combined feeding of bucket elevator and push rod, SMP feeding, etc. Among them, the feeding methods of combined feeding of chain conveyor and push rod, combined feeding of side door and push rod, and combined feeding of bucket elevator and push rod rely on the grab of the overhead crane, with low efficiency and unable to fully meet the production requirements. The SMP feeding system is complex, has a large investment, has high requirements for the solid-liquid ratio, has low equipment stability, and in complex comprehensive disposal scenarios, it also needs to be combined with other feeding technologies for use, making it cumbersome. Summary of the Utility Model

[0003] The purpose of this application is to solve at least one of the technical problems existing in the prior art, and to provide a material conveying system that can harmlessly treat semi-solid materials.

[0004] The technical solution adopted by this application to solve its technical problems is:

[0005] A material conveying system includes

[0006] A conveying pipeline for conveying materials, and a first interface, a second interface, and an output end are sequentially arranged on the conveying pipeline along the material conveying direction;

[0007] A steam pipeline, and the output end of the steam pipeline is connected to the conveying pipeline through the first interface;

[0008] A nitrogen pipeline, and the output end of the nitrogen pipeline is connected to the conveying pipeline through the second interface;

[0009] A rotary kiln, and the rotary kiln is connected to the conveying pipeline through the output end.

[0010] In some embodiments of this application, the material conveying system further includes a feeding pipeline, the output end of the feeding pipeline is connected to the feeding end of the conveying pipeline, and a conveying pump is installed between the feeding pipeline and the conveying pipeline.

[0011] In some embodiments of the present application, a storage tank is connected to the feeding end of the feeding pipeline. The storage tank includes a tank body and a cover plate that cooperate with each other, and the bottom of the tank body is conical.

[0012] In some embodiments of the present application, a tee joint is provided between the feeding pipeline and the tank body. The first end of the tee joint is connected to the tank body, the second end of the tee joint is flexibly connected to the feeding pipeline through a flexible soft connection, and the third end of the tee joint is used to connect to a waste liquid barrel.

[0013] In some embodiments of the present application, a reflux pipeline is connected between the storage tank and the feeding pipeline, and the reflux pipeline is connected to the discharge end of the delivery pump.

[0014] In some embodiments of the present application, a first valve is provided on the delivery pipeline, a pressure gauge is installed on the delivery pipeline, and the installation positions of the first valve and the pressure gauge are both located between the delivery pump and the first interface.

[0015] In some embodiments of the present application, the material conveying system includes a smoke sensing unit, and the smoke sensing unit is arranged close to the storage tank.

[0016] In some embodiments of the present application, a sewage pipe is connected to the delivery pipeline, and the connection point of the sewage pipe and the delivery pipeline is located between the first interface and the delivery pump.

[0017] In some embodiments of the present application, the output end of the steam pipeline is perpendicularly connected to the delivery pipeline, and a second valve is provided on the steam pipeline.

[0018] In some embodiments of the present application, the included angle between the output end of the nitrogen pipeline and the delivery pipeline is an acute angle.

[0019] At least one of the technical solutions in the above technical solutions has the following advantages or beneficial effects: The delivery pipeline of the material conveying system is used for conveying semi-solid materials. The steam pipeline can purge and clean the delivery pipeline, quickly blow the semi-solid materials into the rotary kiln for incineration. The nitrogen pipeline can prevent the rotary kiln from backfiring during the disposal process. The rotary kiln provides the main place for the reaction of semi-solid materials. The material conveying system can convey semi-solid materials and finally enter the rotary kiln for harmless treatment, greatly improving the disposal efficiency of semi-solid materials, increasing the disposal capacity, with reasonable structural settings, optimizing the system structure, saving production change costs, improving the production environment, and being convenient to operate.

[0020] Additional aspects and advantages of the present application will be given in part in the following description, become apparent in part from the following description, or be understood through the practice of the present application. Description of the Drawings

[0021] The accompanying drawings are used to provide a further understanding of the technical solutions disclosed in this application, and constitute a part of the specification. Together with the embodiments disclosed in this application, they are used to explain the technical solutions of this disclosure, and do not constitute a limitation to the technical solutions disclosed in this application, where:

[0022] Figure 1 It is a schematic structural diagram of an embodiment of this application. Detailed implementation manners

[0023] The embodiments of this application are described in detail below. The examples of the embodiments are shown in the accompanying drawings, where the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the accompanying drawings are exemplary and are only used to explain this application, and should not be construed as a limitation to this application.

[0024] In the description of this application, it should be understood that for the orientation description, such as the orientation or positional relationship indicated by up, down, front, back, left, right, etc., is based on the orientation or positional relationship shown in the accompanying drawings. It is only for the convenience of describing this application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to this application.

[0025] In the description of this application, the meaning of several is more than one, the meaning of multiple is more than two, greater than, less than, exceeding, etc. are understood as not including the recited number, and above, below, within, etc. are understood as including the recited number. If there is a description of first and second, it is only for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features or implicitly indicating the sequence of the indicated technical features.

[0026] In the description of this application, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above terms in this application in combination with the specific content of the technical solutions.

[0027] In the description of this application, the description referring to terms such as "one embodiment", "some embodiments", "schematic embodiments", "examples", "specific examples", or "some examples", etc. means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of this application. In this specification, the schematic descriptions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0028] Among them, Figure 1The reference direction coordinate system of the embodiment of the present application is given. The following will be combined with Figure 1 the directions shown in

[0029] to describe the embodiments of the present application.

[0030] The embodiment of the present application provides a material conveying system, including

[0031] a conveying pipeline 100 for conveying materials. Along the material conveying direction on the conveying pipeline 100, a first interface 110, a second interface 120, and an output end 130 are successively provided;

[0032] a steam pipeline 200, the output end of the steam pipeline 200 is connected to the conveying pipeline 100 through the first interface 110;

[0033] a nitrogen pipeline 300, the output end of the nitrogen pipeline 300 is connected to the conveying pipeline 100 through the second interface 120;

[0034] a rotary kiln 400, the rotary kiln 400 is connected to the conveying pipeline 100 through the output end 130. The conveying pipeline 100 of this material conveying system is used for conveying semi-solid materials. The steam pipeline 200 can purge and clean the conveying pipeline 100, quickly blow the semi-solid materials into the rotary kiln 400 for incineration. The nitrogen pipeline 300 can prevent the rotary kiln from backfiring during the disposal process. The rotary kiln 400 provides the main place for the reaction of semi-solid materials. This material conveying system can convey semi-solid materials and finally enter the rotary kiln 400 for harmless treatment, greatly improving the disposal efficiency of semi-solid materials, increasing the disposal production capacity, with reasonable structural settings, optimizing the system structure, saving production change costs, improving the production environment, and being convenient to operate.

[0035] This material conveying system further includes a feeding pipeline 500. The output end of the feeding pipeline 500 is connected to the feeding end of the conveying pipeline 100. A conveying pump 600 is installed between the feeding pipeline 500 and the conveying pipeline 100. The conveying pump 600 pumps semi-solid materials and is the main power device for the conveying of semi-solid materials.

[0036] In some embodiments, the type of the transfer pump 600 is a screw conveyor pump. The screw conveyor pump can convey high-viscosity materials, effectively handle semi-solid materials with relatively high viscosity; it has stable conveying performance, provides uniform and continuous material conveyance, and the flow rate is relatively stable; it has less shearing effect on semi-solid materials, has good self-priming ability, and does not require external auxiliary equipment; the screw conveyor pump has good sealing performance, can reduce leakage, protect the environment and the safety of operators; and has a wide adaptability, can adapt to different working conditions and material characteristics; it is structurally compact, occupies less space, and is convenient for installation and maintenance; it is durable and reliable, has a long service life, and operates reliably; the screw conveyor pump is easy to control, and by adjusting parameters such as rotational speed, precise flow control can be achieved; and the energy consumption is relatively low during the conveying process.

[0037] In other embodiments, the transfer pump 600 can also be a plunger pump, as long as it can achieve the function of pumping semi-solid materials. The plunger pump can generate high pressure and is suitable for applications that require high-pressure output; it can achieve relatively precise flow regulation, has high efficiency, and works relatively stably and reliably, has a long service life, and good sealing performance, and can effectively prevent leakage.

[0038] In some embodiments, the feeding end of the feeding pipeline 500 is connected with a storage tank 700. The storage tank 700 is used for storing semi-solid hazardous waste incineration materials. The storage tank 700 includes a tank body and a cover plate that cooperate with each other. The bottom of the tank body is conical to enhance the fluidity of the semi-solid materials.

[0039] A tee joint is provided between the feeding pipeline 500 and the tank body. The first end of the tee joint is connected to the tank body, and the second end of the tee joint is connected to the feeding pipeline 500 through a flexible soft connection. The third end of the tee joint is used for connecting a waste liquid bucket, which is convenient for the quick access of the waste liquid bucket. The tee joint can realize the branching or confluence of pipelines. Compared with using multiple individual joints, the tee joint can complete the connection of pipelines in a smaller space, can effectively prevent leakage, the installation process is relatively simple, does not require complex tools and techniques, and when the pipeline needs to be replaced or repaired, the tee joint can be easily disassembled and reinstalled.

[0040] In some embodiments, a reflux pipeline 800 is connected between the storage tank 700 and the feeding pipeline 500. The reflux pipeline 800 is connected to the discharge end of the transfer pump 600. The reflux pipeline 800 can flexibly adjust the pipeline pressure and flow rate to avoid working condition fluctuations.

[0041] Specifically, a first valve 140 is provided on the conveying pipeline 100, and the first valve 140 is a hand valve. A pressure gauge 150 is installed on the conveying pipeline 100. The installation position of the first valve 140 and the installation position of the pressure gauge 150 are both located between the conveying pump 600 and the first interface 110. The flow of the conveying pipeline 100 and the indication of the pressure gauge 150 are controlled by the first valve 140. After the material enters the rotary kiln 400, it is ignited and burned by the auxiliary fuel system and the air supply system. Under negative pressure, the temperature of the semi-solid material in the kiln is about 800-950°C, and it moves slowly along the inclined direction of the rotary kiln 400 with the flue gas. After about one hour of burning time (residence time), the thermal ignition reduction rate of the residue is less than 5%, and finally falls into the water-sealed scraper slag discharger at the tail of the rotary kiln 400 and is taken out.

[0042] Under the action of the delivery pump 600, the semi-solid material quickly passes through the feed pipe 500 from the storage tank 700 and enters the delivery pipe 100. The delivery pressure of the semi-solid material is 2.5 bar. When the rotary kiln operating condition is abnormal and needs to reduce the load, the working pressure can be adjusted by the flow of the reflux pipe 800 to match the production condition.

[0043] The material conveying system also includes a smoke sensing unit 900, which is arranged near the storage trough 700 and is mainly used for early fire monitoring. Specifically, the smoke sensing unit 900 is a smoke detector. The smoke sensing unit detector can realize remote signal transmission and sound and light alarm. The alarm of two or more detectors can trigger the automatic fire alarm system of the factory area. Therefore, the smoke sensing unit can be used as an automatic fire monitoring device to automatically identify early fires and trigger park alarms.

[0044] In some embodiments, a drain pipe 160 is connected to the delivery pipeline 100, and the connection point between the drain pipe 160 and the delivery pipeline 100 is located between the first interface 110 and the delivery pump 600. This design greatly facilitates pipeline maintenance and unblocking, thereby reducing equipment maintenance costs, improving material adaptability, and accelerating processing efficiency.

[0045] Specifically, the output end of the steam pipeline 200 is vertically connected to the conveying pipeline 100, that is, the first interface between the steam pipeline 200 and the conveying pipeline 100 is welded at 90° by welding. A second valve 210 is provided on the steam pipeline 200. The second valve 210 is a double - cut - off valve to prevent steam leakage from affecting the working conditions of the rotary kiln 400. When the semi - solid material is blocked in the pipeline during transportation, the operation of the conveying pump 600 is paused, and 2.5 MPa steam is introduced by opening the double - cut - off valve, raising the temperature of the semi - solid material in the blocked pipeline to above 150 °C, greatly reducing the material viscosity, and quickly blowing the material into the rotary kiln 400 for incineration. The double - cut - off valve has reliable cut - off performance, can effectively cut off the fluid flow, and ensure the system's tightness; and has high safety: it prevents fluid leakage and reduces the accident risk; good stability: it provides stable operation and reduces the possibility of failures; wide application range, can be used for various fluid media and different working conditions; and saves space, with a compact structure and a small occupied space; easy to maintain, easy to inspect, repair and replace; durable, with a long service life, can accurately control the flow rate, and has a high cost - performance ratio.

[0046] Specifically, the included angle between the output end of the nitrogen pipeline 300 and the conveying pipeline 100 is an acute angle, that is, the second interface between the nitrogen pipeline 300 and the conveying pipeline 100 is welded at 45°, ensuring the smooth transportation of nitrogen. A third valve is provided on the nitrogen pipeline 300. The third valve is a hand - operated valve, and the nitrogen filling amount is continuously controlled through the hand - operated valve. After nitrogen is replenished, the oxygen content in the conveying pipeline 100 is lower than 1%, ensuring that the connection port between the panel of the rotary kiln 400 and the conveying pipeline is always in an inert gas atmosphere, preventing the panel fire of the rotary kiln 400 from returning to the conveying pipeline.

[0047] The rotary kiln 400 is a down - flow slag rotary kiln. The down - flow slag rotary kiln has high thermal efficiency, can handle semi - solid hazardous waste, enables the material to contact the hot gas flow in a down - flow manner, has high heat transfer efficiency, can make full use of heat, and improves energy utilization rate; has a large processing capacity, can work continuously, and meets the requirements of large - scale production; and has stable quality. Under stable process conditions, it can ensure the consistency and stability of product quality; is easy to operate, with a relatively simple equipment structure, convenient operation, and easy to maintain and manage. Specifically, the down - flow slag rotary kiln is connected to the output end of the conveying pipeline 100, providing the main place for the semi - solid material to react.

[0048] The conveying pipeline 100 is connected by multiple pipeline units. The connection method between multiple pipeline units is flange connection. Using this segmented connection method greatly facilitates pipeline maintenance and blockage removal, thereby reducing equipment maintenance costs, improving material adaptability, and accelerating the processing efficiency.

[0049] In some embodiments, to cope with the corrosiveness of hazardous waste, all pipeline materials are made of stainless steel.

[0050] In the description of this specification, the description with reference to terms such as "example", "embodiment" or "some embodiments" means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in a suitable manner in any one or more embodiments or examples.

[0051] Of course, the present invention is not limited to the above embodiments, and those skilled in the art can also make equivalent deformations or substitutions without departing from the spirit of the present application, and these equivalent deformations or substitutions are all included within the scope defined by the claims of the present application.

Claims

1. A material conveying system, characterized in that: include A conveying pipeline, the conveying pipeline is used to convey materials, and the conveying pipeline is provided with a first interface, a second interface and an output end in sequence along the material conveying direction; A steam pipeline, wherein the output end of the steam pipeline is connected to the delivery pipeline through the first interface; A nitrogen pipeline, the output end of which is connected to the delivery pipeline through the second interface; A rotary kiln is connected to the conveying pipeline through the output end.

2. The material conveying system according to claim 1, characterized in that: It also includes a feed pipeline, the output end of which is connected to the inlet end of the delivery pipeline, and a delivery pump is installed between the feed pipeline and the delivery pipeline.

3. The material conveying system according to claim 2, characterized in that: The feeding end of the feeding pipe is connected with a storage tank, and the storage tank comprises a tank body and a cover plate which cooperate with each other, and the bottom of the tank body is conical.

4. The material conveying system according to claim 3, characterized in that: A three-way joint is provided between the feed pipe and the tank body, the first end of the three-way joint is connected to the tank body, the second end of the three-way joint is connected to the feed pipe through a flexible soft connection, and the third end of the three-way joint is used to connect to the waste liquid barrel.

5. The material conveying system according to claim 3, characterized in that: A reflux pipeline is connected between the material storage tank and the feed pipeline, and the reflux pipeline is connected to the discharge end of the delivery pump.

6. The material conveying system according to claim 5, characterized in that: The delivery pipeline is provided with a first valve, and a pressure gauge is installed on the delivery pipeline. The installation position of the first valve and the installation position of the pressure gauge are both located between the delivery pump and the first interface.

7. The material conveying system according to claim 3, characterized in that: It includes a smoke sensing unit, which is arranged close to the material storage tank.

8. The material conveying system according to claim 2, characterized in that: The delivery pipeline is connected with a sewage pipe, and the connection point between the sewage pipe and the delivery pipeline is located between the first interface and the delivery pump.

9. The material conveying system according to claim 1, characterized in that: The output end of the steam pipeline is vertically connected to the delivery pipeline, and a second valve is provided on the steam pipeline.

10. The material conveying system according to claim 1, characterized in that: The angle between the output end of the nitrogen pipeline and the delivery pipeline is an acute angle.

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