CN112249712A - Negative-pressure anti-blocking pneumatic conveying device for water-containing materials and working method - Google Patents
Negative-pressure anti-blocking pneumatic conveying device for water-containing materials and working method Download PDFInfo
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- CN112249712A CN112249712A CN202011280279.5A CN202011280279A CN112249712A CN 112249712 A CN112249712 A CN 112249712A CN 202011280279 A CN202011280279 A CN 202011280279A CN 112249712 A CN112249712 A CN 112249712A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
- B65G53/00—Conveying materials in bulk through troughs, pipes or tubes by floating the materials or by flow of gas, liquid or foam
- B65G53/34—Details
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
- B65G53/00—Conveying materials in bulk through troughs, pipes or tubes by floating the materials or by flow of gas, liquid or foam
- B65G53/34—Details
- B65G53/40—Feeding or discharging devices
- B65G53/46—Gates or sluices, e.g. rotary wheels
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
- B65G53/00—Conveying materials in bulk through troughs, pipes or tubes by floating the materials or by flow of gas, liquid or foam
- B65G53/34—Details
- B65G53/58—Devices for accelerating or decelerating flow of the materials; Use of pressure generators
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Abstract
The invention relates to a negative-pressure anti-blocking pneumatic conveying device for water-containing materials and a working method of the negative-pressure anti-blocking pneumatic conveying device. The negative-pressure anti-blocking pneumatic conveying device for the water-containing materials and the working method are specially designed for wet materials, the device can loosen the materials hardened by the bridge, meanwhile, the downstream device is forcibly conveyed through the rotating blades, the wet materials are loosened and conveyed step by step in a fully closed state, the blockage is not easy to occur in the conveying process, the conveying safety and accuracy are guaranteed, and the conveying requirement of the special materials is met.
Description
The technical field is as follows:
the invention relates to the technical field of material conveying systems, in particular to a negative-pressure anti-blocking pneumatic conveying device for water-containing materials and a working method.
Background art:
in the prior art, when some water-containing materials, such as sodium ascorbate-ascorbate (VC-NA), are processed, weighed, discharged and conveyed, the wet materials easily cause pipeline blockage, and the blockage needs to be cleaned regularly, so that the processing efficiency is influenced.
The invention content is as follows:
the invention aims to provide a negative-pressure anti-blocking pneumatic conveying device for water-containing materials, which can continuously discharge materials, is accurate in weighing and is not easy to block, and a working method thereof, aiming at overcoming the defects of the prior art.
The invention is realized by the following technical scheme: the utility model provides a moisture material negative pressure anti-blocking pneumatic conveyor, includes one-level separation and filtration all-in-one, one-level centrifuge, feed bin, one-level mixing acceleration chamber, one-level negative pressure pipeline, second grade separation and filtration all-in-one, the storehouse of weighing, second grade mixing acceleration chamber, second grade negative pressure pipeline, second grade centrifuge, dissolving kettle and vacuum device, one-level separation and filtration all-in-one loops through one-level screw conveyer, one-level gyration airlock and is connected with one-level centrifuge, one-level centrifuge is connected with the feed bin, the feed bin loops through second grade screw conveyer, second grade gyration airlock and is connected with one-level mixing acceleration chamber, one-level mixing acceleration chamber is connected with second grade separation and filtration all-in-one through one-level negative pressure pipeline, second grade separation and filtration all-in-one is connected with the storehouse of weighing, The four-stage rotary air locking valve is connected with the second-stage mixing acceleration chamber, the second-stage mixing acceleration chamber is connected with the second-stage centrifugal machine through a second-stage negative pressure conveying pipeline, the second-stage centrifugal machine is connected with the dissolving kettle through a fifth-stage screw conveyor and a fifth-stage rotary air locking valve in sequence, and the vacuum device is connected with the first-stage negative pressure conveying pipeline, the second-stage negative pressure conveying pipeline, the first-stage separation and filtration integrated machine, the second-stage separation and filtration integrated machine and the second-stage centrifugal machine.
The storage bin, the weighing bin and the like in the invention adopt a waterfall type spiral anti-bridging storage bin, the equipment can loosen materials hardened by bridging, and meanwhile, downstream equipment is forcibly transmitted through the rotating blades.
In order to measure the water content of the wet material, a moisture sensor is arranged on the storage bin.
In order to facilitate air intake, the primary negative pressure conveying pipeline and the secondary negative pressure conveying pipeline are connected with the air inlet filtering device.
In order to further avoid the negative pressure conveying pipeline from blocking, a plurality of automatic air inlet valves and pressure testers are uniformly distributed on the first-stage negative pressure conveying pipeline.
Preferably, the first-stage separation and filtration all-in-one machine and the second-stage separation and filtration all-in-one machine are waterfall type separation and filtration all-in-one machines.
Preferably, the vacuum device comprises a silencer, a roots vacuum pump, a Y-type filter and a secondary filter which are connected in sequence.
The invention also provides a working method of the negative-pressure anti-blocking pneumatic conveying device for the water-containing materials, which comprises the following steps:
(1) wet materials enter a centrifugal machine through a primary separation and filtration integrated machine, and enter a storage bin after being centrifuged;
(2) wet materials in the storage bin enter a primary mixing acceleration chamber, are aerated and mixed to be loosened and enter a secondary separation and filtration integrated machine through a primary negative pressure conveying pipeline;
(3) feeding the wet material subjected to the secondary separation and filtration into a weighing bin, and feeding the wet material into a buffer bin after weighing;
(4) wet materials in the buffer bin enter a secondary mixing acceleration chamber, are aerated and mixed, and then enter a secondary centrifuge through a secondary negative pressure conveying pipeline;
(5) and (5) quantitatively feeding the wet materials in the secondary centrifugal machine into a user dissolving kettle to finish feeding.
When the pressure tester on the negative pressure conveying pipeline cannot detect the flow of the material, the automatic air inlet valve at the nearest part of the pressure tester is opened, air is fed at the position closest to the tail end, and simultaneously the negative pressure conveying pipeline generates a Venturi negative pressure effect, so that the maximum pressure value or a certain vacuum degree state is obtained in the negative pressure conveying pipeline, when the pressure tester detects that the material normally runs, the automatic air inlet valve is closed, and all valves of the system are restored to the normal running state; if the last state fails to effectively recover the material operation within a certain time to generate the pipe blockage phenomenon, the next automatic air inlet valve is sequentially opened until the smooth operation of the material in the pipeline is recovered. In the process, materials can be mixed by air flow to be in a certain loose state, the materials are similarly loosened again by the anti-bridging storage bin after entering the storage bin, and the materials are automatically identified and automatically fed unchanged in other processes.
The invention has the beneficial effects that: the negative-pressure anti-blocking pneumatic conveying device for the water-containing materials and the working method are specially designed for wet materials, the wet materials are loosened and conveyed step by step in a fully closed state, blocking is not prone to occurring in the conveying process, the conveying safety and accuracy are guaranteed, and the conveying requirements of the special materials are met.
Description of the drawings:
fig. 1 is a schematic structural diagram of the negative-pressure anti-blocking pneumatic conveying device for the water-containing material and the working method of the device.
The specific implementation mode is as follows:
the following detailed description of the preferred embodiments of the present invention, taken in conjunction with the accompanying drawings, will make the advantages and features of the invention more readily understood by those skilled in the art, and thus will more clearly and distinctly define the scope of the invention.
As shown in fig. 1, the negative pressure anti-blocking pneumatic conveying device for water-containing materials comprises a primary separating and filtering integrated machine 1, a primary centrifuge 4, a storage bin 5, a primary mixing and accelerating chamber 9, a primary negative pressure conveying pipeline 13, a secondary separating and filtering integrated machine 14, a weighing bin 17, a secondary mixing and accelerating chamber 21, a secondary negative pressure conveying pipeline 22, a secondary centrifuge 23, a dissolving kettle 26 and a vacuum device, wherein the primary separating and filtering integrated machine 1 is connected with the primary centrifuge 4 sequentially through a primary screw conveyor 2 and a primary rotary air-lock valve 3, the primary centrifuge 4 is connected with the storage bin 5, the storage bin 5 is provided with a moisture sensor 6, the storage bin 5 is connected with the primary mixing and accelerating chamber 9 sequentially through a secondary screw conveyor 7 and a secondary rotary air-lock valve 8, the primary mixing and accelerating chamber 9 is connected with the secondary separating and filtering integrated machine 14 through a primary negative, a plurality of automatic air inlet valves 11 and pressure testers 12 are uniformly distributed on the first-stage negative pressure conveying pipeline 13, the second-stage separation and filtration integrated machine 14 is connected with the weighing bin 17 through a third-stage screw conveyor 15 and a third-stage rotary air locking valve 16 in sequence, the weighing bin 17 is connected with the second-stage mixing acceleration chamber 21 through a fourth-stage screw conveyor 18, a buffer bin 19 and a fourth-stage rotary air locking valve 20 in sequence, the second-stage mixing acceleration chamber 21 is connected with the second-stage centrifugal machine 23 through a second-stage negative pressure conveying pipeline 22, the second-stage centrifugal machine 23 is connected with the dissolving kettle 26 through a fifth-stage screw conveyor 24 and a fifth-stage rotary air locking valve 25 in sequence, the vacuum device is respectively connected with the first-stage negative pressure conveying pipeline 13, the second-stage negative pressure conveying pipeline 22, the first-stage separation and filtration integrated machine 1, the second-stage, A Roots vacuum pump 28, a Y-shaped filter 29 and a secondary filter 30, wherein the air outlet of the silencer 27 is connected to the safe collection tower, and the primary negative pressure conveying pipeline 13 and the secondary negative pressure conveying pipeline 22 are connected with the air inlet filtering device 10.
The working principle of the invention is as follows:
the negative pressure dilute phase conveying system for the water-containing materials comprises 3 first-stage centrifuges 4, the blanking amount is 900 t/machine/batch, the blanking time is 60 seconds, the single-batch centrifuging operation time is 30min, and at most 2 centrifuges are operated.
Primary conveying: if the horizontal size is less than or equal to 30m and the vertical size is less than or equal to 12m, 3 primary centrifuges 4 are conveyed into a storage bin 5, wet materials in the storage bin 5 enter a primary mixing acceleration chamber 9 through a secondary screw conveyor 7 and a secondary rotary air locking valve 8, are aerated and mixed to be loosened, and enter a secondary separation and filtration integrated machine 14 through a primary negative pressure conveying pipeline 13.
The negative pressure conveying pipeline is provided with automatic air inlet valves 11 and a pressure tester 12 every 12-24 meters. When the material blockage occurs at any section of the pipeline, namely the pressure tester 12 cannot detect the flowing operation of the material, the automatic air inlet valve 11 at the nearest part of the pressure tester 12 is opened, air is introduced at the position closest to the tail end, and simultaneously the pipeline generates a Venturi negative pressure effect, so that the maximum pressure value is obtained in the pipeline or a certain vacuum degree state is kept; if the last state fails to effectively recover the material operation within a certain time and the pipe blockage phenomenon is generated, closing the automatic air inlet valve at the nearest part, and opening the previous automatic air inlet valve until the smooth operation of the material in the pipeline is recovered; if the smooth operation of the process is not recovered within a certain time period, the previous automatic air inlet valves 6, 5, 4, 1 and the like are continuously opened until the whole dredging line normally operates. The roots vacuum pump 28 at the end of the pipeline is always in operation to generate negative pressure in all the processes, and sufficient vacuum degree is provided for the pipeline.
Secondary conveying: if the horizontal length is less than or equal to 78m and the vertical length is less than or equal to 18m, the two-stage separation and filtration integrated machine 14 sends wet materials into 2 pieces of 10m through the three-stage screw conveyor 15 and the three-stage rotary air locking valve 163The wet materials in the buffer storage bin 19 enter a second-stage mixing acceleration chamber 21 through a four-stage rotary air locking valve 20, the wet materials after air-entrapping mixing enter 8 second-stage centrifuges 23 through a second-stage negative pressure conveying pipeline 22, and the wet materials in the second-stage centrifuges 23 are quantitatively conveyed into a user dissolving kettle 26.
The conveying sequence is first-out first-in-first, namely the buffer bins below the buffer bins are conveyed in turn according to the full material sequence, if the buffer bin 1# is full, the buffer bin 1# is conveyed preferentially, and the buffer bin 10m which sends out the feeding signal preferentially is conveyed correspondingly3In the storehouse of weighing, when the material in the storehouse of weighing reaches the setting value of weighing, the system will stop the feeding, automatic switch to another storehouse of weighing, and the feeding process goes on in turn according to the priority. If the material storage amount of the middle buffer storage bin is 4-5t, the middle buffer storage bin is provided with a 300 mm-150 mm transparent access hole, the top of the middle buffer storage bin is provided with a DN500 manhole opening, the bottom screw conveying feed opening adopts a square opening, the screw conveying top is in a quick opening mode, the maintenance is convenient, and the bottom feed opening is provided with a gate valve. Because the material contains 4-5% of methanol, the equipment configuration is designed into an explosion-proof grade DIII BT4 and a protection grade IP67 according to explosion-proof requirements, the design of the explosion-proof requirements can be met, the process is totally closed, if gas needs to be supplemented, nitrogen or inert gas can be supplemented to prevent excessive oxygen content, no gas is leaked in all operations, and gas discharged from the tail end through a fan can be collected in a centralized manner and is subjected to environment-friendly safe treatment. In the second-level conveying, the materials are sequentially conveyed into the buffer storage bin and quantitatively fed into the user dissolving kettle below. The storehouse of weighing must not ejection of compact at the feeding in-process, must not feed at ration ejection of compact in-process equally to influence the precision of weighing, the user dissolves the cauldron and possesses the compound balance function, can further detect the check and repeat the metering value to the material that the front end measurement went into in the dissolving cauldron. If the materials in the dissolving kettle are unqualified, the dissolving kettle can be usedAnd conveying the mixture into the front-end centrifuge again through the conveying system for reprocessing.
It should be noted that, the inner wall of each mechanism or pipeline of the invention is coated with PTFE anti-sticking coating, further avoiding the occurrence of blockage.
In addition, in the description of the embodiments of the present invention, unless otherwise explicitly specified or limited, the terms "mounted," "connected," "disposed," "provided," and the like are to be construed broadly and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The number m (meters) in the "horizontal" and "vertical" can be understood as distance and height parameters required in the actual process, specific data in the description is not taken as invariant data, and the data can be any required data within a design range; ' Bin m3"again, this is based on the parameters set in the actual field and can be of any size. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art will understand that: any person skilled in the art can modify or easily conceive the technical solutions described in the foregoing embodiments or equivalent substitutes for some technical features within the technical scope of the present disclosure; such modifications, changes or substitutions do not depart from the spirit and scope of the embodiments of the present invention, and they should be construed as being included therein. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (8)
1. The utility model provides a pneumatic conveyor of stifled material is prevented to aqueous material negative pressure which characterized in that: the device comprises a first-stage separation and filtration all-in-one machine, a first-stage centrifugal machine, a storage bin, a first-stage mixing acceleration chamber, a first-stage negative pressure conveying pipeline, a second-stage separation and filtration all-in-one machine, a weighing bin, a second-stage mixing acceleration chamber, a second-stage negative pressure conveying pipeline, a second-stage centrifugal machine, a dissolving kettle and a vacuum device, wherein the first-stage separation and filtration all-in-one machine is connected with the first-stage centrifugal machine sequentially through a first-stage screw conveyor and a first-stage rotary air-locking valve, the storage bin is connected with the first-stage mixing acceleration chamber sequentially through a second-stage screw conveyor and a second-stage rotary air-locking valve, the first-stage mixing acceleration chamber is connected with the second-stage separation and filtration all-in-one machine through a third-stage screw conveyor and a third, the second-stage mixing acceleration chamber is connected with a second-stage centrifugal machine through a second-stage negative pressure conveying pipeline, the second-stage centrifugal machine is connected with the dissolving kettle sequentially through a fifth-stage screw conveyor and a fifth-stage rotary air locking valve, and the vacuum device is connected with the first-stage negative pressure conveying pipeline, the second-stage negative pressure conveying pipeline, the first-stage separation and filtration all-in-one machine, the second-stage separation and filtration all-in-one machine and the second-stage centrifugal machine respectively.
2. The negative-pressure anti-blocking pneumatic conveying device for the water-containing materials according to claim 1, characterized in that: and a moisture sensor is arranged on the storage bin.
3. The negative-pressure anti-blocking pneumatic conveying device for the water-containing materials according to claim 1, characterized in that: the primary negative pressure conveying pipeline and the secondary negative pressure conveying pipeline are connected with the air inlet filtering device.
4. The negative-pressure anti-blocking pneumatic conveying device for the water-containing materials according to claim 1, characterized in that: and a plurality of automatic air inlet valves and pressure testers are uniformly distributed on the primary negative pressure conveying pipeline.
5. The negative-pressure anti-blocking pneumatic conveying device for the water-containing materials according to claim 1, characterized in that: the primary separation and filtration integrated machine and the secondary separation and filtration integrated machine are waterfall type separation and filtration integrated machines.
6. The negative-pressure anti-blocking pneumatic conveying device for the water-containing materials according to claim 1, characterized in that: the vacuum device comprises a silencer, a Roots vacuum pump, a Y-shaped filter and a secondary filter which are connected in sequence.
7. The working method of the negative-pressure anti-blocking pneumatic conveying device for the aqueous material according to any one of claims 1 to 6 is characterized by comprising the following steps of:
(1) wet materials enter a centrifugal machine through a primary separation and filtration integrated machine, and enter a storage bin after being centrifuged;
(2) wet materials in the storage bin enter a primary mixing acceleration chamber, are aerated and mixed to be loosened and enter a secondary separation and filtration integrated machine through a primary negative pressure conveying pipeline;
(3) feeding the wet material subjected to the secondary separation and filtration into a weighing bin, and feeding the wet material into a buffer bin after weighing;
(4) wet materials in the buffer bin enter a secondary mixing acceleration chamber, are aerated and mixed, and then enter a secondary centrifuge through a secondary negative pressure conveying pipeline;
(5) and (5) quantitatively feeding the wet materials in the secondary centrifugal machine into a user dissolving kettle to finish feeding.
8. The working method of the negative-pressure anti-blocking pneumatic conveying device for the water-containing materials according to claim 7 is characterized in that: when the pressure tester on the negative pressure conveying pipeline cannot detect the flow of the material, the automatic air inlet valve at the nearest part of the pressure tester is opened, air is introduced from the position closest to the tail end, and simultaneously the negative pressure conveying pipeline generates a Venturi negative pressure effect, so that the maximum pressure value or a certain vacuum degree state is obtained in the negative pressure conveying pipeline, when the pressure tester detects that the material normally runs, the automatic air inlet valve is closed, and all valves of the system recover to a normal running state; if the last state fails to effectively recover the material operation within a certain time to generate the pipe blockage phenomenon, the next automatic air inlet valve is sequentially opened until the smooth operation of the material in the pipeline is recovered.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011280279.5A CN112249712A (en) | 2020-11-16 | 2020-11-16 | Negative-pressure anti-blocking pneumatic conveying device for water-containing materials and working method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202011280279.5A CN112249712A (en) | 2020-11-16 | 2020-11-16 | Negative-pressure anti-blocking pneumatic conveying device for water-containing materials and working method |
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| CN112249712A true CN112249712A (en) | 2021-01-22 |
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| CN202011280279.5A Pending CN112249712A (en) | 2020-11-16 | 2020-11-16 | Negative-pressure anti-blocking pneumatic conveying device for water-containing materials and working method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114194832A (en) * | 2021-11-25 | 2022-03-18 | 安徽艾普克斯智能科技有限公司 | Negative pressure pneumatic conveying and collecting system |
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2020
- 2020-11-16 CN CN202011280279.5A patent/CN112249712A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114194832A (en) * | 2021-11-25 | 2022-03-18 | 安徽艾普克斯智能科技有限公司 | Negative pressure pneumatic conveying and collecting system |
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