CN220115682U - Negative pressure gas conveying device - Google Patents
Negative pressure gas conveying device Download PDFInfo
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- CN220115682U CN220115682U CN202321724265.7U CN202321724265U CN220115682U CN 220115682 U CN220115682 U CN 220115682U CN 202321724265 U CN202321724265 U CN 202321724265U CN 220115682 U CN220115682 U CN 220115682U
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- pipeline
- negative pressure
- pressure gas
- discharging
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- 238000007599 discharging Methods 0.000 claims abstract description 51
- 239000000463 material Substances 0.000 claims abstract description 26
- 230000007704 transition Effects 0.000 claims description 6
- 239000000428 dust Substances 0.000 abstract description 7
- 238000004519 manufacturing process Methods 0.000 abstract description 4
- 239000007789 gas Substances 0.000 description 15
- 239000011343 solid material Substances 0.000 description 10
- 239000003795 chemical substances by application Substances 0.000 description 6
- 239000007787 solid Substances 0.000 description 4
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 3
- 230000000903 blocking effect Effects 0.000 description 3
- 239000003546 flue gas Substances 0.000 description 3
- MWUXSHHQAYIFBG-UHFFFAOYSA-N nitrogen oxide Inorganic materials O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 3
- 230000006978 adaptation Effects 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 230000001502 supplementing effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
Landscapes
- Air Transport Of Granular Materials (AREA)
Abstract
The utility model discloses a negative pressure gas conveying device, which belongs to the field of material conveying and comprises a guide chute, an air inlet pipeline and a discharge pipeline, wherein the discharge pipeline is arranged below the guide chute, and a discharging opening is formed in the side wall of the top of the discharge pipeline; the front end of the discharging pipeline is closed, and the rear end of the discharging pipeline is connected with a material conveying target; the front end of the air inlet pipeline is connected with the fan, and the diameter of the air outlet at the rear end is reduced to form a necking section; the necking section stretches into the discharging pipeline and is positioned below the discharging port, and the diameter of the necking section is smaller than that of the discharging pipeline. According to the utility model, the negative pressure is formed in the blanking area through the arrangement of the necking section, and the material is automatically sucked into the conveying gas through the negative pressure of the blanking opening, so that the problem of unsmooth blanking is avoided, the wind return and dust raising are avoided, and the working environment is greatly improved. The utility model has the advantages of simple structure, convenient processing and manufacturing, low cost and strong practicability.
Description
Technical Field
The utility model relates to the field of material conveying, in particular to a negative pressure gas conveying device.
Background
In the actual production and life process, solid conveying problems are often encountered, and the solid comprises powder, particles and the like, and the common conveying modes mainly comprise mechanical conveying and pneumatic conveying. In pneumatic conveying, compressed air, a high-pressure centrifugal fan or a Roots blower is generally adopted for supplying air to convey fluid, a storage bin is arranged at the upper part of the pneumatic conveying device, and the pneumatic conveying device is connected with a flange. Solid raw materials in the storage bin are discharged into a conveying pipeline below, and the solid raw materials are driven by compressed air to be conveyed along the conveying pipeline.
For example, in the field of dry denitration, a powder or granular denitration agent is stored in a bin, the denitration agent is fed into a pipeline through a feeding structure at the bottom of the bin, and the denitration agent in the pipeline is conveyed to a boiler through compressed air to react with nitrogen oxides in boiler flue gas, so that denitration is performed.
In the prior art, a device for carrying out negative pressure gas conveying on solid materials is generally shown in fig. 1, in this way, a fan is connected to the right side of a pipeline, a conveying destination is connected to the left side of the pipeline, and a blanking port is formed on the pipeline and is connected with a bin above the pipeline through a specific structure. The fan provides positive pressure gas from right to left, and solid materials fall into the pipeline through the blanking port and are carried away and transported by the gas.
The above structure has the following defects: because the gas is conveyed from right to left in a positive pressure manner, and the wind pressure of the fan is high, the air pressure in the whole pipeline is in a positive pressure state and is higher than the external air pressure, so that upward air pressure (shown by an upward arrow in a curve in fig. 1) can be formed at the blanking port, positive pressure blocking is formed on the blanking port, so that blanking is unsmooth, and the blanking effect is influenced; moreover, when the material in the feed bin is less, upward atmospheric pressure of blanking mouth can cause the wind-back, leads to the raise dust in the feed bin, influences operational environment.
Disclosure of Invention
In order to solve the problems in the prior art, the utility model provides the negative pressure gas conveying device which automatically attracts materials into a conveying gas through the negative pressure of a discharging opening, thereby avoiding the problem of unsmooth discharging, avoiding wind return and dust rising and greatly improving the working environment.
The technical scheme provided by the utility model is as follows:
the utility model provides a negative pressure gas conveying device, includes baffle box, air inlet pipeline and ejection of compact pipeline, wherein:
the discharging pipeline is arranged below the material guide groove, the bottom of the material guide groove is connected with the top of the material guide pipeline, a discharging opening is formed in the side wall of the top of the material guide pipeline, and the discharging opening is used for communicating the interior of the material guide groove with the interior of the material guide pipeline;
the front end of the discharging pipeline is closed, and the rear end of the discharging pipeline is connected with a material conveying target; the front end of the air inlet pipeline is connected with the fan, and the diameter of the air outlet at the rear end is reduced to form a necking section; the necking section stretches into the discharging pipeline from the front end of the discharging pipeline and is positioned below the discharging port, and the diameter of the necking section is smaller than that of the discharging pipeline.
Further, the outlet end face of the necking section does not exceed the rearmost end of the blanking port.
Further, the diameter of the necking section is smaller than one third of the diameter of the discharging pipeline.
Further, a flange used for being connected with the storage bin is arranged at the top end of the guide chute.
Further, a conical transition section is arranged between the necking section and the air inlet pipeline with the diameter not reduced.
Further, the conical transition section and the part of the necking section, which is positioned outside the discharging pipeline, are provided with shells with the same diameter as the air inlet pipeline with the diameter not reduced.
Further, the front end of the shell is connected with an air inlet pipeline with the diameter not reduced, and the rear end of the shell is connected with the front end of the discharging pipeline.
Further, a negative pressure air supplementing port communicated with the inside of the guide chute is arranged on the side wall of the guide chute.
Further, an air filtering device is arranged on the negative pressure air supplementing port.
The utility model has the following beneficial effects:
when the utility model is used, the guide chute is connected with the bin above, and the top end of the guide chute can be provided with a flange for being connected with the bin. Solid materials in the storage bin fall into the guide chute after being subjected to metering and blanking through the blanking device and the like. The fan at the front end of the air inlet pipeline provides compressed air, and the air is conveyed to the rear end through pressure. Because the diameter of the necking section at the rear end of the discharging pipeline is smaller, air is ejected out from the outlet of the necking section at a high speed, and high-speed air flow is formed below the discharging opening. According to Bernoulli's principle, the higher the wind speed, the smaller the pressure, so that negative pressure is formed in the part below the blanking port, that is, in the blanking area.
According to the utility model, the negative pressure is formed in the blanking area through the arrangement of the necking section, so that the problems of unsmooth blanking and wind return and dust raising caused by positive pressure blocking of the blanking opening in the prior art are solved, and the solid material is smoothly blanked and can be well mixed with conveying gas. In addition, the negative pressure below the feed opening is favorable for automatically sucking the solid materials in the guide chute into the discharge pipeline, so that the problem of unsmooth blanking is solved. The utility model has the advantages of simple structure, convenient processing and manufacturing, low cost and strong practicability.
Drawings
FIG. 1 is a schematic diagram of a prior art negative pressure gas delivery device;
fig. 2 is a schematic view of a negative pressure gas delivery device of the present utility model.
Detailed Description
In order to make the technical problems, technical solutions and advantages to be solved more apparent, the following detailed description will be given with reference to the accompanying drawings and specific embodiments.
The embodiment of the utility model provides a negative pressure gas conveying device, which is shown in fig. 2 and comprises a guide chute 1, an air inlet pipeline 2 and a discharge pipeline 3, wherein:
the discharging pipeline 3 is arranged below the material guide groove 1, the bottom of the material guide groove 1 is connected with the top of the discharging pipeline 3, the side wall of the top of the discharging pipeline 3 is provided with a discharging opening 4, and the discharging opening 4 is used for communicating the interior of the material guide groove 1 with the interior of the discharging pipeline 3.
The front end 5 of the discharging pipeline 3 is closed, and the rear end is connected with a material conveying target. The front end of the air inlet pipeline 2 is connected with a fan, and the diameter of the air outlet at the rear end is reduced to form a necking section 6. The necking section 6 extends into the discharging pipeline 3 from the front end 5 of the discharging pipeline 3, the necking section 6 is located below the discharging port 4, and the diameter of the necking section 6 is smaller than that of the discharging pipeline 3.
When the utility model is used, the guide chute 1 is connected with a bin above, and the top end of the guide chute 1 can be provided with a flange 9 for connecting with the bin. The solid materials in the bin fall into the guide chute 1 after being metered and discharged by a discharger and the like. The fan at the front end of the air inlet pipeline 2 supplies compressed air, and the air is conveyed to the rear end through pressure. Because the diameter of the necking section 6 at the rear end of the discharging pipeline 3 is smaller, air is ejected from the outlet of the necking section 6 at a high speed, and a high-speed air flow is formed below the discharging opening 4. According to the Bernoulli principle, the higher the wind speed, the smaller the pressure, so that a negative pressure is formed in the portion below the blanking port 4, i.e., a negative pressure state is formed in the blanking area.
According to the utility model, the negative pressure is formed in the blanking area through the arrangement of the necking section 6, so that the problems of unsmooth blanking and wind return and dust raising of the blanking opening caused by positive pressure blocking in the prior art are solved, and the solid material is smoothly blanked and can be well mixed with conveying gas. In addition, the negative pressure below the discharging opening 4 is helpful for automatically sucking the solid materials in the guide chute 1 into the discharging pipeline 3, and the problem of unsmooth discharging is avoided. The utility model has the advantages of simple structure, convenient processing and manufacturing, low cost and strong practicability.
As an improvement of the utility model, the side wall of the guide chute 1 is provided with a negative pressure air supply port 7 communicated with the inside of the guide chute 1, and the negative pressure air supply port provides more external air for the discharge pipeline 3, so that the air conveying flow rate is ensured.
When the purity requirements of the transported solid materials are not high, such as the transportation of the denitration agent, the denitration agent is used for reacting with the boiler flue gas and finally is discharged together with the boiler flue gas. Therefore, the dosage of the denitration agent only reaches the standard, and no requirement is made on whether impurities are mixed in the conveying process. At this time, the negative pressure air supply port 7 can suck dust to the vicinity of the vicinity device through the connecting pipe, thereby improving the vicinity working environment.
When the requirement of the conveyed solid material on the purity is high, dust cannot be sucked through the negative pressure air supply port 7. At this time, an air filter 8 may be provided in the negative pressure air supply port 7 to filter impurities in the air.
In the utility model, the outlet end face of the necking section 6 does not exceed the rearmost end of the feed opening 4, namely. A pressure compensating gap is reserved between the outlet end face of the necking section 6 and the end face of the rear end of the blanking port 4, so that materials can enter a subsequent pipeline and enter a negative pressure air compensating port for air intake. The conveying gas in the discharging pipeline 3 is mixed with the materials to finish speed increasing, and the mixture passes through the outlet of the discharging pipeline 3 and enters the subsequent conveying system.
Preferably, the diameter of the constriction 6 is less than one third of the diameter of the discharge line 3.
In one example, there is a conical transition section 10 between the reduced mouth section 6 and the intake conduit 2 of non-reduced diameter. The conical transition section 10 and the necking section 6 are provided with a shell 11 with the same diameter as the air inlet pipeline 2 with the diameter not reduced on the outer part of the discharging pipeline 3. The front end of the shell 11 is connected with the air inlet pipeline 2 with the diameter not reduced, and the rear end is connected with the front end of the discharging pipeline 3.
While the foregoing is directed to the preferred embodiments of the present utility model, it will be appreciated by those skilled in the art that various modifications and adaptations can be made without departing from the principles of the present utility model, and such modifications and adaptations are intended to be comprehended within the scope of the present utility model.
Claims (9)
1. The utility model provides a negative pressure gas delivery device which characterized in that, includes baffle box, air inlet pipeline and ejection of compact pipeline, wherein:
the discharging pipeline is arranged below the material guide groove, the bottom of the material guide groove is connected with the top of the material guide pipeline, a discharging opening is formed in the side wall of the top of the material guide pipeline, and the discharging opening is used for communicating the interior of the material guide groove with the interior of the material guide pipeline;
the front end of the discharging pipeline is closed, and the rear end of the discharging pipeline is connected with a material conveying target; the front end of the air inlet pipeline is connected with the fan, and the diameter of the air outlet at the rear end is reduced to form a necking section; the necking section stretches into the discharging pipeline from the front end of the discharging pipeline and is positioned below the discharging port, and the diameter of the necking section is smaller than that of the discharging pipeline.
2. The negative pressure gas delivery device of claim 1, wherein the outlet end face of the necked-down section does not exceed the rearmost end of the feed opening.
3. The negative pressure gas delivery device of claim 1, wherein the diameter of the necked-down section is less than one third of the diameter of the discharge conduit.
4. The negative pressure gas delivery device of claim 1, wherein the top end of the guide chute is provided with a flange for connection with a silo.
5. The negative pressure gas delivery device of claim 1, wherein a tapered transition section is provided between the necked-down section and the non-reduced diameter inlet conduit.
6. The negative pressure gas delivery device according to claim 5, wherein the tapered transition section and the portion of the reduced mouth section outside the discharge duct are provided with a casing having the same diameter as the intake duct having a non-reduced diameter.
7. The negative pressure gas delivery device according to claim 6, wherein the front end of the housing is connected to an air intake duct having a non-reduced diameter, and the rear end is connected to the front end of the discharge duct.
8. The negative pressure gas delivery device according to any one of claims 1 to 7, wherein a negative pressure gas supply port communicating with the inside of the guide chute is provided on a side wall of the guide chute.
9. The negative pressure gas delivery device according to claim 8, wherein an air filter device is provided on the negative pressure gas supply port.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321724265.7U CN220115682U (en) | 2023-07-04 | 2023-07-04 | Negative pressure gas conveying device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321724265.7U CN220115682U (en) | 2023-07-04 | 2023-07-04 | Negative pressure gas conveying device |
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| Publication Number | Publication Date |
|---|---|
| CN220115682U true CN220115682U (en) | 2023-12-01 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321724265.7U Active CN220115682U (en) | 2023-07-04 | 2023-07-04 | Negative pressure gas conveying device |
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| Country | Link |
|---|---|
| CN (1) | CN220115682U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117432461A (en) * | 2023-12-15 | 2024-01-23 | 太原理工大学 | Drilling gas pulse type extraction device and extraction method |
-
2023
- 2023-07-04 CN CN202321724265.7U patent/CN220115682U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117432461A (en) * | 2023-12-15 | 2024-01-23 | 太原理工大学 | Drilling gas pulse type extraction device and extraction method |
| CN117432461B (en) * | 2023-12-15 | 2024-03-19 | 太原理工大学 | Drilling gas pulse type extraction device and extraction method |
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