CN209836215U - Fluidization tank, blast furnace coal injection device and system - Google Patents
Fluidization tank, blast furnace coal injection device and system Download PDFInfo
- Publication number
- CN209836215U CN209836215U CN201920478364.9U CN201920478364U CN209836215U CN 209836215 U CN209836215 U CN 209836215U CN 201920478364 U CN201920478364 U CN 201920478364U CN 209836215 U CN209836215 U CN 209836215U
- Authority
- CN
- China
- Prior art keywords
- tank
- blast furnace
- fluidization
- injection
- coal injection
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Landscapes
- Manufacture Of Iron (AREA)
- Blast Furnaces (AREA)
Abstract
The utility model discloses a blast furnace coal injection device, which comprises an injection tank, a quantitative feeding device and a quantitative feeding device driving mechanism, and is characterized in that the blast furnace coal injection device also comprises a fluidization tank and a weighing device; the fluidization tank is arranged on the weighing device; the fluidization tank is communicated with the quantitative feeding device, and the fluidization tank is in flexible connection with the quantitative feeding device. The utility model provides a pair of blast furnace coal injection device installs fluidization jar and weighing device in the dosing device export, adopts coal injection volume two-stage control method, reaches the purpose that further improves the measurement accuracy of jetting volume.
Description
Technical Field
The utility model relates to a pneumatic conveying system of bulk material, concretely relates to blast furnace coal injection device and system.
Background
At present, a parallel injection technology is mostly adopted in a blast furnace coal injection system, 2-4 injection tanks correspond to one blast furnace, the injection tanks are installed on the same platform beam, three electronic scales are arranged below the injection tanks, and the injection amount is calculated by detecting the weight change of the injection tanks. The current blast furnace coal injection system mainly has the following problems:
firstly, the precision of the electronic scale of the blowing tank can not meet the requirement of the blowing precision of the blast furnace, and the error is overlarge. The volume of the blowing tank is 20-100 m3, the powder loading amount is 10-50t/h, and the electronic scale precision in the measuring range is about 5kg generally. The blast furnace injection amount is generally 10-100 t/h (the instantaneous injection amount is 2.8-28 kg/s), the instantaneous fluctuation is generally required to be within 5%, and the precision of the electronic scale is not more than 2kg, so that the precision of the electronic scale in the original process is overlapped with that of the instantaneous injection, and the accurate measurement of the injection amount is difficult to realize.
Secondly, as the electronic scales of all the injection tanks are arranged on the same platform beam, powder loading is finished within 5-6min within 10-50t/h in the coal loading process, the electronic scales of the injection tanks are impacted, the false impression of increased injection amount is formed, and the balance among process parameters is damaged.
And after a plurality of flexible connections connected with the injection tank are pressurized, a large internal stress is formed, and the stress is difficult to measure and eliminate, so that the weighing process of the electronic scale is greatly influenced.
Finally, in the operation process of the coal injection system adopting the quantitative feeding, as the pulverized coal is in a static state in the quantitative feeding machine, a large amount of high-pressure gas is consumed for acceleration before entering a pipeline, so that the energy consumption is increased, and the fluidized dense-phase conveying is difficult to realize.
SUMMERY OF THE UTILITY MODEL
In view of the above-mentioned shortcomings of the prior art, the present invention provides a fluidization tank, a blast furnace coal injection apparatus, a system and a control method.
In order to achieve the above and other related objects, the present invention provides a fluidization tank, which comprises a tank body, wherein the tank body is provided with a gas inlet and a gas powder outlet; a fluidizing device is arranged in the tank body, a plurality of through holes are formed in the fluidizing device, and the through holes are communicated with the gas inlet; the tank body is also provided with a material guide device communicated with the gas powder outlet, and the material guide device is connected with the gas powder outlet through a pipeline.
In order to achieve the above objects and other related objects, the present invention also provides a coal injection device for a blast furnace, comprising a blowing tank, a quantitative feeding device and a quantitative feeding device driving mechanism, wherein the coal injection device for the blast furnace further comprises a fluidization tank and a weighing device; the fluidization tank is arranged on the weighing device; the fluidization tank is communicated with the quantitative feeding device, and the fluidization tank is in flexible connection with the quantitative feeding device.
Optionally, a gas inlet and a gas powder flow outlet are arranged on the fluidization tank; and a fluidizing device for fluidizing the pulverized coal is arranged in the fluidizing tank, and a plurality of through holes are formed in the fluidizing device and communicated with the gas inlet.
Optionally, a material guiding device communicated with the gas-powder outlet is further disposed in the fluidization tank, and the material guiding device is connected with the gas-powder outlet through a coal powder pipe.
Optionally, the ratio of the inlet cross-sectional area of the material guide device to the outlet cross-sectional area of the fluidizing device is between 0.001 and 1.
Optionally, the material guiding device is a bell mouth structure facing the fluidizing device.
Optionally, the blast furnace coal injection device further comprises a pressure sensor, a primary controller and a secondary controller, the pressure sensor, the primary controller and the secondary controller are arranged on the injection tank, the primary controller is connected between the pressure sensor and the quantitative feeding device driving mechanism, and the secondary controller is connected between the quantitative feeding device driving mechanism and the weighing device.
In order to achieve the above objects and other related objects, the present invention also provides a coal injection system for a blast furnace, comprising a pulverized coal bunker and a coal injection device for a blast furnace communicating with the pulverized coal bunker.
In order to achieve the above objects and other related objects, the present invention also provides a coal injection system for a blast furnace, comprising a pulverized coal bunker and at least two pulverized coal injection devices communicating with the pulverized coal bunker, further comprising a distributor communicating with the pulverized gas outlet of each fluidization tank.
As mentioned above, the utility model discloses a blast furnace coal injection device, system has following beneficial effect:
1. the utility model provides a blast furnace coal injection device and system, a fluidized tank and a weighing device are arranged at the outlet of a quantitative feeding device, the accurate measurement of the injection amount can be realized, a two-stage control method of the injection amount is further adopted, and the purpose of further improving the measurement accuracy of the injection amount is achieved;
2. the utility model provides a blast furnace coal injection system, the weighing device of which is arranged on the ground of the projection area below the fluidization tank, which can avoid the weighing device from being influenced by other coal injection devices, thereby maintaining the stable injection process;
3. the utility model provides a pair of blast furnace coal injection device, system can maintain buggy weight dynamic balance in the fluidization jar through exporting the installation fluidization jar at the dosing device, can fully fluidize the buggy again, accelerate the buggy in advance to reach the purpose that reduces the energy consumption.
Drawings
Fig. 1 is a schematic view of a fluidization tank according to an embodiment of the present invention;
FIG. 2 is a schematic view of a coal injection apparatus for a blast furnace according to an embodiment of the present invention;
FIG. 3 is a schematic view of a coal injection system for a blast furnace according to an embodiment of the present invention;
wherein 1 is a pulverized coal bunker, 2 is a first injection tank, 2 'is a second injection tank, 3 is a first quantitative feeding device, 3' is a second quantitative feeding device, 4 is a first high-pressure compensator, 4 'is a second high-pressure compensator, 5 is a first fluidization tank, 5' is a second fluidization tank, 6 is a first material guiding device, 6 'is a second material guiding device, 7 is a first fluidization device, 7' is a second fluidization device, 8 is a first weighing device, 8 'is a second weighing device, 9 is a first fluidization valve, 9' is a second fluidization valve, 10 is a first coal conveying valve, 10 'is a second coal conveying valve, 11 is a first quantitative feeding device driving mechanism, 11' is a second quantitative feeding device driving mechanism, 12 is a first secondary controller, 12 'is a second secondary controller, 13 is a distributor, 14 is a blast furnace, 15 is a first secondary controller, 15' is a second primary controller, 16 is a first pressure sensor, 16 ' is a second pressure sensor, 17 is a first level sensor, 17 ' is a second level sensor, 18 is a first pressurizing valve, and 18 ' is a second pressurizing valve.
Detailed Description
The following description of the embodiments of the present invention is provided for illustrative purposes, and other advantages and effects of the present invention will be readily apparent to those skilled in the art from the disclosure herein. The present invention can also be implemented or applied through other different specific embodiments, and various details in the present specification can be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention. It is to be noted that the features in the following embodiments and examples may be combined with each other without conflict.
It should be noted that the drawings provided in the following embodiments are only for illustrating the basic concept of the present invention, and the components related to the present invention are only shown in the drawings rather than drawn according to the number, shape and size of the components in actual implementation, and the form, amount and ratio of the components in actual implementation may be changed at will, and the layout of the components may be more complicated.
As shown in fig. 1, the present embodiment provides a fluidization tank, which includes a tank body provided with a gas inlet and a gas powder outlet; a fluidizing device is arranged in the tank body, a plurality of through holes are formed in the fluidizing device, and the through holes are communicated with the gas inlet; the tank body is also provided with a material guide device communicated with the gas powder outlet, and the material guide device is connected with the gas powder outlet through a pipeline.
The fluidization device is a fluidization plate and is arranged at the bottom of the tank body, a plurality of through holes are uniformly distributed in the fluidization plate, air enters the tank body from the air inlet, and dust in the tank is fluidized through the fluidization plate. The material guiding device is of a horn-shaped structure, the opening direction of the material guiding device is downward and is opposite to the fluidization plate, and the fluidized dust is discharged from the gas powder outlet through the material guiding device.
As shown in fig. 2, the embodiment further provides a coal injection device for a blast furnace, which includes an injection tank, a quantitative feeding device and a quantitative feeding device driving mechanism, wherein the injection tank and the quantitative feeding device are connected by bolts. The quantitative feeding device driving mechanism can precisely adjust the rotating speed of the quantitative feeding device and control the feeding amount of the quantitative feeding device. The dosing device and the dosing device driving mechanism may be of the prior art, and the structure thereof is not described herein. And the blowing tank is provided with a pressure sensor, a material level sensor and a pressurization threshold. The pressure sensor is used for detecting the pressure of the injection tank, the material level sensor is used for detecting the interface position of the pulverized coal in the injection tank, and the pressurization threshold is used for adjusting the pressure in the injection tank.
The blast furnace coal injection device also comprises a fluidization tank and a weighing device, and is used for accurately measuring the weight of the pulverized coal in the injection tank. The fluidization tank is arranged on the weighing device, and the weighing device is a high-precision weighing sensor.
In this embodiment, the fluidization tank is communicated with the dosing device, and the fluidization tank is in flexible connection with the dosing device. In particular, the fluidization tank is connected to the dosing device via a high-pressure compensator. The quantitative feeding device and the high-pressure compensator are connected through bolts, and the high-pressure compensator and the fluidization tank are connected through bolts.
Because the fluidization tank and the quantitative feeding device are in flexible connection, and the injection tank is fixed, the weighing device measures the total weight of the fluidization tank and the equipment arranged in the fluidization tank and on the fluidization tank, and therefore, compared with the prior art that the weighing device measures the weight of the whole coal injection device, the metering precision of the injection amount can be improved.
Furthermore, the outlet of the quantitative feeding device is provided with the fluidization tank, so that the dynamic balance of the weight of the pulverized coal in the fluidization tank can be maintained, the pulverized coal can be fully fluidized, and the pulverized coal can be accelerated in advance, thereby achieving the purpose of reducing energy consumption.
To further reduce the instances of disturbance of the weighing device, a high-precision weighing cell may be mounted on the ground below the fluidization tank.
In one embodiment, the fluidization tank comprises a tank body, and a gas inlet and a gas powder flow outlet are arranged on the tank body; a fluidizing device is arranged in the tank body, a plurality of through holes are formed in the fluidizing device, and the through holes are communicated with the gas inlet; the tank body is also provided with a material guide device communicated with the gas powder outlet, and the material guide device is connected with the gas powder outlet through a pipeline. The outside of the tank body is provided with a coal powder pipe communicated with the gas powder outlet, and a coal conveying threshold is arranged on the coal powder pipe; a pulverized coal pipe is also arranged to communicate with the gas inlet, and a fluidization threshold is arranged thereon. The coal conveying valve is used for controlling the coal powder to be conveyed to the position, and the fluidizing valve is used for controlling air entering the tank body.
The fluidization device is a fluidization plate and is arranged at the bottom of the tank body, a plurality of through holes are uniformly distributed on the fluidization plate, gas enters the tank body from the gas inlet, and dust in the tank is fluidized through the fluidization plate. The material guiding device is of a horn-shaped structure, the opening direction of the material guiding device is downward and is opposite to the fluidization plate, and the fluidized dust is discharged from the gas powder outlet through the material guiding device.
In one embodiment, the ratio of the inlet cross-sectional area of the material guiding device to the outlet cross-sectional area of the fluidizing device is between 0.001 and 1.
In order to further improve the metering precision of the injection quantity, the blast furnace coal injection device further comprises a pressure sensor, a primary controller and a secondary controller which are arranged on the injection tank, wherein the primary controller is connected between the pressure sensor and the quantitative feeding device driving mechanism, and the secondary controller is connected between the quantitative feeding device driving mechanism and the weighing device. The coal injection quantity rough adjustment is realized by the first-stage controller, the coal injection quantity fine adjustment is realized by the second-stage controller, and the specific adjustment method comprises the following steps:
judging whether the difference value between the set value Sp of the injection quantity and the current value Si of the injection quantity exceeds Delta S (the initial value of Delta S is 2t/h) by using a primary controller of the injection quantity; if the pressure exceeds the preset pressure, the pressure of the blowing tank is firstly increased or reduced by delta P (the initial value of the delta P is 0.05MPa), and then the rotating speed of the quantitative feeding device is increased or reduced by delta n1 (the initial value of the delta n1 is 1 r/min); if not, only increasing or decreasing the dosing device rotational speed Δ n is performed;
judging whether a difference value t between a current injection quantity value Si and a set injection quantity value Sp exceeds a limit value eta (the initial value of eta is 2%) by utilizing a secondary coal injection quantity controller; if not, controlling the rotating speed of the quantitative feeding device to be unchanged; if this is exceeded, the dosing device rotational speed Δ n2 is increased or decreased (initial value of Δ n2 is 0.1 r/min).
The embodiment provides a blast furnace coal injection system which comprises a pulverized coal bunker and a blast furnace coal injection device communicated with the pulverized coal bunker. Wherein, the blast furnace coal injection device adopts the structure, and the detailed description is omitted here.
The embodiment also provides a blast furnace coal injection system, which comprises a pulverized coal bunker, at least two blast furnace coal injection devices communicated with the pulverized coal bunker, and a distributor, wherein the distributor is communicated with the gas-powder outlet of each fluidization tank, and then pulverized coal enters the blast furnace through the distributor.
Generally, 1-6 blast furnace coal injection devices can be simultaneously arranged in parallel below each pulverized coal bunker, and each 1-3 blast furnace coal injection devices are connected in parallel and collected and then connected with a distributor 13 and a blast furnace 14 through a pulverized coal main pipe;
each blast furnace coal injection device sequentially performs the steps of powder loading, pressurization, injection, pressure relief and the like, and when a material level sensor of an injection tank reaches a set maximum value, the loading is stopped; opening the pressurizing valve 16, and stopping pressurizing when the pressure in the blowing tank reaches a set value; opening the fluidizing valve and the coal conveying valve, starting a driving mechanism of the quantitative feeding device 3 to start injection, closing the coal conveying valve, the fluidizing valve and the pressurizing valve when a material level sensor of the injection tank reaches a set minimum value, and switching to another series to start injection.
The following description is given of two blast furnace coal injection devices simultaneously connected in parallel under one pulverized coal bunker.
As shown in fig. 3, the present embodiment further provides a coal injection system for a blast furnace, which includes a pulverized coal bunker 1, a first injection tank 2, a second injection tank 2 ', a first quantitative feeding device 3, a second quantitative feeding device 3', a first high-pressure compensator 4, a second high-pressure compensator 4 ', a first fluidized tank 5, and a second fluidized tank 5', wherein the pulverized coal bunker is respectively communicated with the first injection tank and the second injection tank through a pipeline. The first quantitative feeding device is driven by a first quantitative feeding device driving mechanism 11, the second quantitative feeding device is driven by a second quantitative feeding device driving mechanism 11', a first high-pressure compensator is arranged at the outlet end of the first quantitative feeding device, and the first high-pressure compensator is used for realizing the flexible connection between the first quantitative feeding device and the first fluidized tank. And a second high-pressure compensator is arranged at the outlet end of the second quantitative feeding device and is used for realizing the flexible connection between the second quantitative feeding device and the second fluidized tank. The bottom of the first fluidization tank is provided with a first fluidization device 7, the first fluidization tank is internally provided with a first material guide device 6, and the bottom of the first fluidization tank is provided with a high-precision weighing sensor 8. The bottom of the second fluidization tank is provided with a second fluidization device 7, the second fluidization tank is also internally provided with a second material guide device 6', and the bottom of the second fluidization tank is provided with a second high-precision weighing sensor 8.
A first pressure sensor 16, a first material level sensor 17 and a first pressurization valve 18 are arranged on the first blowing tank; the first fluidization tank is also provided with a first fluidization valve 9, a first coal conveying valve 10 is arranged on a coal conveying pipe connected with the first material guide device, a first primary controller 15 is arranged between the first pressure sensor and the first quantitative feeding device driving mechanism, and a first secondary controller 12 is arranged between the first quantitative feeding device driving mechanism and the first weighing device.
A second pressure sensor 16 ', a second material level sensor 17 ' and a second pressurization valve 18 ' are arranged on the first blowing tank; the second fluidization tank is also provided with a second fluidization valve 9 ', a second coal conveying valve 10' is arranged on a coal conveying pipe connected with the second material guiding device, a second primary controller 15 'is arranged between the second pressure sensor and the second quantitative feeding device driving mechanism, and a second secondary controller 12' is arranged between the second quantitative feeding device driving mechanism and the second weighing device.
In this embodiment, the specific structure, the arrangement position, and the specific function of each component/device may refer to the corresponding parts of the foregoing embodiments, and are not described herein again.
In the embodiment, the two blast furnace coal injection devices sequentially perform the steps of powder loading, pressurization, injection, pressure relief and the like, and when the material level sensor of the injection tank reaches a set maximum value, the loading is stopped; one blast furnace coal injection device opens a pressurizing valve, and when the pressure in an injection tank reaches a set value, the pressurizing is stopped; and opening the fluidization valve and the coal conveying valve, starting a driving mechanism of the quantitative feeding device to start injection, and closing the coal conveying valve, the fluidization valve and the pressurization valve when a material level sensor of the injection tank reaches a set minimum value. At the moment, the blast furnace coal injection device can be switched to another blast furnace coal injection device to start injection, and the operation is alternately circulated.
The embodiment provided by the utility model has gained following effect:
1. the utility model provides a blast furnace coal injection device and system, a fluidized tank and a weighing device are arranged at the outlet of a quantitative feeding device, the accurate measurement of the injection amount can be realized, a two-stage control method of the injection amount is further adopted, and the purpose of further improving the measurement accuracy of the injection amount is achieved;
2. the utility model provides a blast furnace coal injection system, a high-precision weighing sensor of which is arranged on the ground of a projection area below a fluidized tank, and can avoid the electronic scale from being influenced by other injection series, thereby maintaining the stable injection process;
3. in view of the buggy of dosing device export is in the state of piling up, need consume a large amount of high-pressure gas before the buggy gets into the pipeline and accelerate, and the energy consumption is higher, the utility model discloses an at batcher export installation fluidization jar, can maintain buggy weight dynamic balance in the fluidization jar, can fully fluidize the buggy again, accelerate in advance the buggy to reach the purpose that reduces the energy consumption.
The above embodiments are merely illustrative of the principles and effects of the present invention, and are not to be construed as limiting the invention. Modifications and variations can be made to the above-described embodiments by those skilled in the art without departing from the spirit and scope of the present invention. Accordingly, it is intended that all equivalent modifications or changes which may be made by those skilled in the art without departing from the spirit and technical spirit of the present invention be covered by the claims of the present invention.
Claims (9)
1. A fluidization tank is characterized by comprising a tank body, wherein a gas inlet and a gas powder flow outlet are formed in the tank body; a fluidizing device is arranged in the tank body, a plurality of through holes are formed in the fluidizing device, and the through holes are communicated with the gas inlet; the tank body is also provided with a material guide device communicated with the gas powder outlet, and the material guide device is connected with the gas powder outlet through a pipeline.
2. A blast furnace coal injection device comprises an injection tank, a quantitative feeding device and a quantitative feeding device driving mechanism, and is characterized by also comprising a fluidization tank and a weighing device; the fluidization tank is arranged on the weighing device; the fluidization tank is communicated with the quantitative feeding device, and the fluidization tank is in flexible connection with the quantitative feeding device.
3. The blast furnace coal injection apparatus according to claim 2, wherein the fluidizing tank is provided with a gas inlet and a pulverized gas outlet; and a fluidizing device for fluidizing the pulverized coal is arranged in the fluidizing tank, and a plurality of through holes are formed in the fluidizing device and communicated with the gas inlet.
4. The blast furnace coal injection device of claim 3, wherein a material guiding device is further disposed in the fluidization tank and is in communication with the pulverized gas outlet, and the material guiding device is connected to the pulverized gas outlet through a pulverized coal pipe.
5. The coal injection device for a blast furnace as claimed in claim 4, wherein the ratio of the inlet cross-sectional area of the material guiding device to the outlet cross-sectional area of the fluidizing device is 0.001-1.
6. The coal injection apparatus of claim 4, wherein the guiding device is a bell-mouth structure facing the fluidizing device.
7. The blast furnace coal injection device of claim 2, further comprising a pressure sensor disposed on the injection tank, a primary controller connected between the pressure sensor and the dosing device driving mechanism, and a secondary controller connected between the dosing device driving mechanism and the weighing device.
8. A blast furnace coal injection system, which is characterized by comprising a pulverized coal bunker and a blast furnace coal injection device according to any one of claims 2 to 7, wherein the blast furnace coal injection device is communicated with the pulverized coal bunker.
9. A blast furnace coal injection system, comprising a pulverized coal bunker and at least two blast furnace coal injection devices according to any one of claims 2 to 7 communicated with the pulverized coal bunker, and further comprising a distributor communicated with the pulverized gas outflow port of each fluidization tank.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920478364.9U CN209836215U (en) | 2019-04-10 | 2019-04-10 | Fluidization tank, blast furnace coal injection device and system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920478364.9U CN209836215U (en) | 2019-04-10 | 2019-04-10 | Fluidization tank, blast furnace coal injection device and system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209836215U true CN209836215U (en) | 2019-12-24 |
Family
ID=68910897
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920478364.9U Active CN209836215U (en) | 2019-04-10 | 2019-04-10 | Fluidization tank, blast furnace coal injection device and system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209836215U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109897923A (en) * | 2019-04-10 | 2019-06-18 | 中冶赛迪技术研究中心有限公司 | A kind of streaming tank, coal powder injection apparatus of blast furnace, system and control method |
-
2019
- 2019-04-10 CN CN201920478364.9U patent/CN209836215U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109897923A (en) * | 2019-04-10 | 2019-06-18 | 中冶赛迪技术研究中心有限公司 | A kind of streaming tank, coal powder injection apparatus of blast furnace, system and control method |
| CN109897923B (en) * | 2019-04-10 | 2024-04-30 | 中冶赛迪技术研究中心有限公司 | Control method of blast furnace coal injection device |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US7175048B2 (en) | Method and device for gravimetric dosing bulk material | |
| CN209836215U (en) | Fluidization tank, blast furnace coal injection device and system | |
| CN101391709A (en) | Long distance concentrated phase conveying system and method with auxiliary blowing apparatus | |
| CN105177200B (en) | A kind of bf coal injection system and its control method | |
| CN105060224A (en) | Coating filling method | |
| US7273339B2 (en) | Powder transport method and apparatus | |
| CN111517127A (en) | Dynamic and static interaction metering system and metering method | |
| CN112794082A (en) | Cabin pump, pneumatic conveying system and method for measuring mass of materials in cabin pump | |
| CN108408414B (en) | Novel powder material tank-combining uniform conveying system | |
| JP2002326161A (en) | Shot peening method, and device thereof | |
| CN211999789U (en) | Pressurizing control device of injection tank in parallel-tank coal injection system | |
| CN109607235B (en) | Take self-loopa's buggy charge-in system | |
| CN109897923B (en) | Control method of blast furnace coal injection device | |
| JP6139763B1 (en) | Powder parallel blowing system and powder parallel blowing method | |
| CN103292004A (en) | High-speed forging valve control device of hydraulic forging machine | |
| CN104692127A (en) | Dense-phase conveying control method and system | |
| CN103282676A (en) | Oil pressure system for wheel loader | |
| CN101464184A (en) | Negative-pressure pneumatic conveying and measuring system | |
| CN201138233Y (en) | Negative-pressure pneumatic conveying and measuring system | |
| CN103935539A (en) | Automatic high-accuracy packing scale | |
| CN210102038U (en) | Accurate packaging system for powder | |
| JPH0711313A (en) | Control method for blowing of pulverized coal | |
| CN113776631B (en) | Weighing device and method of linear prediction type powder metering scale | |
| CN117775738B (en) | Sealed weightless masterbatch feeder and control method for accurate feeding thereof | |
| CN212402757U (en) | Dynamic and static interaction metering system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |