Material filling device and method for large containers

Abstract

This invention discloses a material filling device and method for large containers. The material filling device includes a feeding assembly, a pneumatic control system, and a discharging assembly. The feeding assembly includes a feeding tank, a buffer tank, and a storage tank. Feed valves are connected between the feeding tank and the buffer tank, and between the buffer tank and the storage tank. A discharge valve is connected to the lower end of the storage tank. The pneumatic control system includes a gas source and a gas source interface, an inlet valve, an exhaust valve, a control cabinet, a gas-material mixture pipeline, and a gas path. Inlet valves are connected between the gas source interface and the buffer tank and the storage tank. An exhaust valve is connected between the gas source interface and the gas-material mixture pipeline. The storage tank is connected to the gas-material mixture pipeline via a discharge valve. The discharging assembly includes a gas-material separator, an exhaust filter located at the top of the gas-material separator, and a discharge port located at the bottom of the gas-material separator. The gas-material mixture pipeline is connected to the gas-material separator. This invention has advantages and positive effects such as low cost, high safety, and high utilization rate.

Description

Technical Field

[0001] This invention belongs to the field of material filling technology, and particularly relates to a material filling device and method for large containers. Background Technology

[0002] Large-scale chemical projects often involve numerous large containers requiring insulation, especially the cold boxes in air separation units, which are large and tall. These containers require insulation materials such as perlite, and regular replenishment is necessary. With the development of domestic chemical projects, air separation units are becoming increasingly larger, and their cold boxes are getting taller, leading to larger perlite loading volumes. Actual calculations show that a single loading volume is approximately 12,000 m³. 3 Based on the loose density of perlite (35–50 kg / m³), 3 It features a particle size of 1.2mm to 0.154mm with a proportion of no less than 90%, and the perlite filling height in the cold box is about 60m.

[0003] In existing technology, the method of filling the cold box of an air separation unit with perlite involves using a chain-like mechanism to transport the perlite, in woven bags, one by one to the top of the cold box via a dedicated auxiliary steel structure fixed to the cold box. The bags are then manually opened at the top to pour the perlite into the cold box. With a perlite filling height of 60m, this means at least 60m of dedicated auxiliary steel structure is required. This not only results in high procurement and operating costs but also presents drawbacks such as susceptibility to corrosion, low utilization rate, difficulty in installation and replacement, and safety hazards associated with working at heights. Summary of the Invention

[0004] To address some or all of the technical problems existing in the prior art, the present invention provides a material filling device and method for large containers.

[0005] The material filling device for large containers provided by the present invention includes a feeding assembly, a pneumatic control system, and a discharging assembly, wherein:

[0006] The feeding assembly includes a feeding tank, a buffer tank, and a storage tank. The feeding tank, the buffer tank, and the storage tank are mounted on a movable support from top to bottom. A first feeding valve is connected between the feeding tank and the buffer tank, and a second feeding valve is connected between the buffer tank and the storage tank. A discharge valve is connected to the lower end of the storage tank.

[0007] The pneumatic control system includes a gas source, a first inlet valve, a second inlet valve, a third inlet valve, an exhaust valve, a gas nozzle, a control cabinet, a gas source interface, a gas-material mixed phase pipeline, and multiple gas lines. The gas source interface is located on the control cabinet and connected to the gas source. The first inlet valve is connected between the gas source interface and the buffer tank through the gas lines. The second inlet valve is connected between the gas source interface and the upper end of the storage tank through the gas lines. The third inlet valve is connected between the gas source interface and the lower end of the storage tank through the gas lines. The exhaust valve is connected between the gas source interface and the gas-material mixed phase pipeline through the gas lines. The gas nozzle is located in the gas-material mixed phase pipeline and connected to the exhaust valve. The storage tank is connected to the gas-material mixed phase pipeline through the discharge valve.

[0008] The discharge assembly includes a gas-material separator, an exhaust filter disposed on the upper part of the gas-material separator, and a discharge port disposed on the lower part of the gas-material separator. The gas-material mixed phase pipeline is connected to the gas-material separator.

[0009] Furthermore, in the aforementioned material filling device for large containers, the feed tank, the buffer tank, and the storage tank are made of high-pressure canvas hoses.

[0010] Furthermore, in the above-mentioned material filling device for large containers, a steel ring is provided on the upper outer ring of the feed tank, and a steel ring is provided on the outer ring of the middle part of the buffer tank and the storage tank. The upper outer ring of the feed tank is fixed to the upper part of the movable support, and the outer ring of the middle part of the buffer tank and the storage tank is fixed to the movable support.

[0011] Furthermore, in the aforementioned material filling device for large containers, the gas path and the gas-material mixing phase pipe are made of high-pressure canvas water hoses.

[0012] Furthermore, in the aforementioned material filling device for large containers, rollers are installed at the bottom of the movable support.

[0013] Furthermore, in the aforementioned material filling device for large containers, the gas-material separator is a cyclone separator or a volumetric separator.

[0014] Furthermore, in the above-mentioned material filling device for large containers, the pneumatic control system further includes a fourth air inlet valve, which is connected between the air source interface and the discharge valve at the lower end of the storage tank through the air passage.

[0015] In one specific embodiment, in the above-mentioned material filling device for large containers, the large container is a cold box of an air separation unit, the material is insulation material, and the gas source is instrument gas purified by molecular sieves from the air separation unit.

[0016] The material filling method for large containers provided by this invention includes the following steps:

[0017] (1) Move the material loading device to the vicinity of the large container to be loaded, place the gas-material separator above the top of the large container, and close the first feed valve, the second feed valve, the discharge valve, the first air inlet valve, the second air inlet valve, the third air inlet valve, and the exhaust valve. Connect the gas source interface to the gas source.

[0018] (2) Open the first feed valve, and the material is fed from the feed tank and enters the buffer tank. When the material in the buffer tank reaches 70% to 90% of its capacity, close the first feed valve and continue to feed the material into the feed tank.

[0019] (3) Open the first air inlet valve and the third air inlet valve, and control the air pressure of the first air inlet valve to be greater than the air pressure of the third air inlet valve. Then open the second air inlet valve and the second feed valve. The material enters the storage tank from the buffer tank with the airflow.

[0020] (4) Open the exhaust valve and control the air pressure of the exhaust valve to be lower than the air pressure of the second air inlet valve, so that the airflow enters the gas-material mixture pipeline;

[0021] (5) After all the material in the buffer tank has entered the storage tank, close the first air inlet valve and the third air inlet valve, close the second feed valve and open the discharge valve. The material enters the gas-material mixture pipeline with the airflow and enters the gas-material separator under the pneumatic drive of the gas nozzle. The gas is discharged from the exhaust filter and the material is filled into the large container from the discharge port.

[0022] (6) After all the material in the storage tank has entered the gas-material mixture pipeline, close the second air inlet valve, close the discharge valve, open the first feed valve, and repeat the above steps (2), (3), and (5) until all the material is filled in the large container. Then disconnect the gas source, disassemble the material filling device and store it for later use.

[0023] In one specific implementation, the above-mentioned material filling method for large containers is applied to filling perlite as insulation material into the cold box of an air separation unit, wherein the large container is a cold box, the material is perlite, and the gas source is instrument gas purified by molecular sieves from the air separation unit.

[0024] The material filling device and method for large containers of the present invention have the following advantages and positive effects:

[0025] The material filling device of the present invention is installed when in use and disassembled and stored when not in use. It has a compact structure and is easy to assemble and disassemble. Unlike the prior art, it does not require a special auxiliary steel structure for containers / cold boxes. The manufacturing and use costs are low, and there is no need for manual high-altitude operations, which significantly improves safety.

[0026] The gas source used in the material loading device and method of the present invention is instrument gas purified by molecular sieve of air separation equipment, which does not require the addition of an air compressor and further saves the cost of use.

[0027] In addition to filling perlite into the cold box of an air separation unit, the material filling device and method of the present invention can also be used to fill other materials in large containers, such as various other materials that are not easily broken, not easily deformed, and not easily heated and spontaneously combusted, with high utilization rate. Attached Figure Description

[0028] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only for further understanding of the embodiments of the present invention and constitute a part of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. In the drawings:

[0029] Figure 1 This is a schematic diagram of the material filling device for large containers according to the present invention.

[0030] Explanation of reference numerals in the attached figures:

[0031] 1-Feed tank, 2-First feed valve, 3-Buffer tank, 4-Second feed valve, 5-Storage tank, 6-Discharge valve, 7-First air inlet valve, 8-Second air inlet valve, 9-Third air inlet valve, 10-Exhaust valve, 11-Air nozzle, 12-Control cabinet, 13-Air source interface, 14-Exhaust filter, 15-Air-material separator, 16-Discharge port, 17-Air path, 18-Air-material mixed phase pipeline, 19-Moving support, 19.1-Roller. Detailed Implementation

[0032] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be clearly and completely described below in conjunction with specific embodiments and corresponding drawings. Obviously, the described embodiments are only a part of the embodiments of this invention, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without creative effort are within the scope of protection of this invention.

[0033] like Figure 1As shown, the material filling device for large containers of the present invention includes a feeding assembly, a pneumatic control system, and a discharging assembly. The feeding assembly includes a feeding tank 1, a buffer tank 3, and a storage tank 5. The feeding tank 1, buffer tank 3, and storage tank 5 are mounted on a movable support 19 from top to bottom. A first feeding valve 2 connects the feeding tank 1 and the buffer tank 3, and a second feeding valve 4 connects the buffer tank 3 and the storage tank 5. A discharge valve 6 is connected to the lower end of the storage tank 5. The pneumatic control system includes a gas source, a first air inlet valve 7, a second air inlet valve 8, a third air inlet valve 9, an exhaust valve 10, a gas nozzle 11, a control cabinet 12, a gas source interface 13, a gas-material mixture pipeline 18, and multiple gas lines 17. The gas source interface 13 is located on the control cabinet 12 and connected to the gas source. The first air inlet valve 7... The air passage 17 connects the air source interface 13 and the buffer tank 3. The second air inlet valve 8 connects the air source interface 13 and the upper end of the storage tank 5 through the air passage 17. The third air inlet valve 9 connects the air source interface 13 and the lower end of the storage tank 5 through the air passage 17. The exhaust valve 10 connects the air source interface 13 and the gas-material mixture pipeline 18 through the air passage 17. The air nozzle 11 is installed in the gas-material mixture pipeline 18 and connected to the exhaust valve 10. The storage tank 5 is connected to the gas-material mixture pipeline 18 through the discharge valve 6. The discharge assembly includes a gas-material separator 15, an exhaust filter 14 installed on the upper part of the gas-material separator 15, and a discharge port 16 installed on the lower part of the gas-material separator 15. The gas-material mixture pipeline 18 is connected to the gas-material separator 15.

[0034] Furthermore, in the material filling device for large containers of the present invention, rollers 19.1 are installed at the bottom of the movable support 19.

[0035] Furthermore, in the material filling device for large containers of the present invention, the gas-material separator 15 may be a cyclone separator or a volumetric separator.

[0036] Furthermore, in the material filling device for large containers of the present invention, the gas passage 17 and the gas-material mixture pipeline 18 are made of high-pressure canvas hoses, which makes them easy to disassemble, store, and install.

[0037] Furthermore, in the material filling device for large containers of the present invention, the feed tank 1, buffer tank 3, and storage tank 5 are made of high-pressure canvas hoses, which makes them easy to disassemble, store, and install. Preferably, a steel ring is provided on the upper outer ring of the feed tank 1, and a steel ring is provided on the middle outer ring of the buffer tank 3 and the storage tank 5. Thus, by fixing the upper outer steel ring of the feed tank 1 to the upper part of the movable support 19, and fixing the middle outer steel rings of the buffer tank 3 and the storage tank 5 to the movable support 19 respectively, the feed tank 1, buffer tank 3, and storage tank 5 can be installed on the movable support 19 from top to bottom, and the storage space is naturally formed by gravity.

[0038] Optionally, the feed tank 1, buffer tank 3, storage tank 5, gas line 17 and gas-material mixed phase pipeline 18 can also be made of other easily foldable high-strength materials, and the movable bracket 19 can be made into an irregular bracket, which can be installed and fixed during use.

[0039] Optionally, the pneumatic control system may also include a fourth air inlet valve (not shown), which is connected via air passage 17 between the air source interface 13 and the discharge valve 6 at the lower end of the storage tank 5.

[0040] In one specific embodiment, in the material filling device for a large container of the present invention, the large container is a cold box of an air separation unit, the material to be filled is a thermal insulation material such as perlite, and the gas source is instrument gas purified by molecular sieve of the air separation unit.

[0041] The material filling method for large containers of the present invention is implemented using the above-mentioned material filling device, and specifically includes the following steps:

[0042] (1) Move the material filling device to the vicinity of the large container to be filled by roller 19.1, and place the gas separator 15 above the top of the large container. Close the first feed valve 2, the second feed valve 4, the discharge valve 6, the first air inlet valve 7, the second air inlet valve 8, the third air inlet valve 9, and the exhaust valve 10. Connect the gas source interface 13 to the gas source.

[0043] (2) Open the first feed valve 2, and the material is fed from the feed tank 1 and enters the buffer tank 3. When the material in the buffer tank 3 reaches 70% to 90% of its capacity, close the first feed valve 2 and the feed tank 1 continues to feed.

[0044] (3) The control cabinet 12 controls the first air inlet valve 7 and the third air inlet valve 9 to open, and controls the air pressure of the first air inlet valve 7 to be greater than the air pressure of the third air inlet valve 9. Then the control cabinet 12 controls the second air inlet valve 8 to open, and opens the second feed valve 4. The material enters the storage tank 5 from the buffer tank 3 with the airflow.

[0045] (4) The control cabinet 12 controls the exhaust valve 10 to open and controls the air pressure of the exhaust valve 10 to be less than the air pressure of the second air inlet valve 8, so that the airflow enters the gas-material mixture pipeline 18.

[0046] (5) After all the material in the buffer tank 3 has entered the storage tank 5, the control cabinet 12 controls the first air inlet valve 7 and the third air inlet valve 9 to close, close the second feed valve 4 and open the discharge valve 6. The material enters the gas-material mixed phase pipeline 18 with the airflow and enters the gas-material separator 15 under the pneumatic drive of the air nozzle 11. The gas is discharged from the exhaust filter 14 and the material is filled into the large container from the discharge port 16.

[0047] (6) After all the material in the storage tank 5 has entered the gas-material mixed phase pipeline 18, the control cabinet 12 controls the second air inlet valve 8 to close, the discharge valve 6 to close, and the first feed valve 2 to open. Repeat the above steps (2), (3), and (5) until all the material is filled in the large container. Then disconnect the gas source, disassemble the material filling device and store it for later use.

[0048] In the material filling method for large containers of the present invention, in step (2), preferably when the material in the buffer tank 3 reaches 80% of its capacity, the first feed valve 2 is closed.

[0049] In the material filling method for large containers of the present invention, when a blockage occurs near the first feed valve 2, the first air inlet valve 7 is opened to perform backflushing and vibration to discharge the material; when a blockage occurs near the second feed valve 4, the second air inlet valve 8 is opened to perform backflushing and vibration to discharge the material.

[0050] Optionally, in the material filling method for large containers of the present invention, when a blockage occurs near the discharge valve 6, the fourth air inlet valve is opened to perform backflushing and vibration to discharge the material.

[0051] In one specific embodiment, the material filling method for large containers of the present invention is applied to filling perlite as a heat insulation material into the cold box of an air separation unit, wherein the large container is a cold box, the material is perlite, and the gas source is instrument gas purified by molecular sieve of the air separation unit.

[0052] In summary, compared with the prior art, the material filling device and method for large containers of the present invention have the following advantages and positive effects:

[0053] The material filling device of the present invention is installed when in use and disassembled and stored when not in use. It has a compact structure and is easy to assemble and disassemble. Unlike the prior art, it does not require a special auxiliary steel structure for containers / cold boxes. The manufacturing and use costs are low, and there is no need for manual high-altitude operations, which significantly improves safety.

[0054] The gas source used in the material loading device and method of the present invention is instrument gas purified by molecular sieve of air separation equipment, which does not require the addition of an air compressor and further saves the cost of use.

[0055] In addition to filling perlite into the cold box of an air separation unit, the material filling device and method of the present invention can also be used to fill other materials in large containers, such as various other materials that are not easily broken, not easily deformed, and not easily heated and spontaneously combusted, with high utilization rate.

[0056] It should be noted that, unless otherwise expressly specified and limited, the term "connection" or its synonyms should be interpreted broadly in this document. For example, "connection" can be a fixed connection or a detachable connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be the internal communication of two elements or the interaction between two elements. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances. Furthermore, expressions such as "first" and "second" are merely used to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Meanwhile, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. In addition, the terms "front," "rear," "left," "right," "upper," and "lower" in this document refer to the placement states shown in the accompanying drawings.

[0057] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A material loading device for large containers, characterized in that, The material filling device comprises a feeding assembly, a gas control system, and a discharging assembly, wherein: The feeding assembly comprises a feeding tank, a buffer tank, and a storage tank, the feeding tank, the buffer tank, and the storage tank are installed on a moving support from top to bottom, a first feeding valve is connected between the feeding tank and the buffer tank, a second feeding valve is connected between the buffer tank and the storage tank, and a discharging valve is connected to the lower end of the storage tank; The gas control system comprises a gas source, a first gas inlet valve, a second gas inlet valve, a third gas inlet valve, a gas outlet valve, a gas nozzle, a control cabinet, a gas source interface, a gas-material mixing phase pipeline, and a plurality of gas paths, the gas source interface is arranged on the control cabinet and is communicated with the gas source, the first gas inlet valve is communicated with the gas source interface and the buffer tank through the gas path, the second gas inlet valve is communicated with the gas source interface and the upper end of the storage tank through the gas path, the third gas inlet valve is communicated with the gas source interface and the lower end of the storage tank through the gas path, the gas outlet valve is communicated with the gas source interface and the gas-material mixing phase pipeline through the gas path, the gas nozzle is arranged in the gas-material mixing phase pipeline and is communicated with the gas outlet valve, and the storage tank is communicated with the gas-material mixing phase pipeline through the discharging valve; The discharging assembly comprises a gas-material separator, an exhaust filter arranged on the upper part of the gas-material separator, and a discharging port arranged on the lower part of the gas-material separator, and the gas-material mixing phase pipeline is communicated with the gas-material separator; The feeding tank, the buffer tank, and the storage tank are made of high-pressure canvas water hose; A steel ring is arranged on the outer ring of the upper end of the feeding tank, a steel ring is arranged on the outer ring of the middle part of the buffer tank and the storage tank, and the steel ring on the outer ring of the upper end of the feeding tank is fixed to the upper part of the moving support, and the steel ring on the outer ring of the middle part of the buffer tank and the storage tank is fixed to the moving support.

2. The material filling device for a large container according to claim 1, characterized by The gas path and the gas-material mixing phase pipeline are made of high-pressure canvas water hose.

3. The material filling device for a large container according to claim 1, wherein Rollers are arranged on the bottom of the moving support.

4. The material filling device for a large container according to claim 1, wherein The gas-material separator is a cyclone separator or a volumetric separator.

5. The material filling device for a large container according to claim 1, wherein The gas control system further comprises a fourth gas inlet valve, which is communicated with the gas source interface and the discharging valve of the lower end of the storage tank through the gas path.

6. The material filling device for large containers according to any one of claims 1 to 5, characterized in that The large container is a cold box of air separation equipment, the material is thermal insulation material, and the gas source is instrument air purified by a molecular sieve of air separation equipment.

7. A material filling method for a large container, which is implemented by using the material filling device for a large container according to any one of claims 1 to 6, and comprises the following steps: (1) moving the material filling device to the vicinity of the large container to be filled with material, placing the gas-material separator above the top of the large container, closing the first feeding valve, the second feeding valve, the discharging valve, the first gas inlet valve, the second gas inlet valve, the third gas inlet valve, and the gas outlet valve, and connecting the gas source interface to the gas source; (2) opening the first feeding valve, feeding the material from the feeding tank into the buffer tank, closing the first feeding valve when the material in the buffer tank reaches 70% to 90% of the capacity, and continuously feeding the material in the feeding tank; (3) open the first and third air inlet valves, control the air pressure of the first air inlet valve to be greater than that of the third air inlet valve, then open the second air inlet valve, open the second material inlet valve, and the material enters the storage tank along with the airflow from the buffer tank; (4) open the exhaust valve, control the air pressure of the exhaust valve to be less than that of the second air inlet valve, and the airflow enters the gas-material mixing phase pipeline; (5) after the material in the buffer tank enters the storage tank completely, close the first and third air inlet valves, close the second material inlet valve and open the material outlet valve, the material enters the gas-material mixing phase pipeline along with the airflow and enters the gas-material separator under the driving of the gas jet nozzle, the gas is discharged from the exhaust filter, and the material is filled into the large container from the discharge port; (6) after the material in the storage tank enters the gas-material mixing phase pipeline completely, close the second air inlet valve and the material outlet valve, open the first material inlet valve, repeat the above steps (2), (3) and (5) until the filling of all the material in the large container is completed, then disconnect the air source, disassemble the material filling device and store it for standby.

8. The method for filling a large container according to claim 7, wherein The material filling method is applied to filling pearlite as a heat preservation material into a cold box of an air separation plant, wherein the large container is the cold box, the material is the pearlite, and the air source is instrument air purified by molecular sieve of the air separation plant.

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