CN102703630B - Pulverized coal mixing device - Google Patents
Pulverized coal mixing device Download PDFInfo
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- CN102703630B CN102703630B CN2012101881430A CN201210188143A CN102703630B CN 102703630 B CN102703630 B CN 102703630B CN 2012101881430 A CN2012101881430 A CN 2012101881430A CN 201210188143 A CN201210188143 A CN 201210188143A CN 102703630 B CN102703630 B CN 102703630B
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- coal dust
- impeller
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- pulverized coal
- trash
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Abstract
The invention discloses a pulverized mixing device, relates to novel powder power machinery with integrated pulverized coal mixing, energy recovery and reutilization, and pulverized coal flow measurement functions, in particular to a technology for collecting and recycling the energy of high-pressure pulverized coal, belongs to the technical field of the combination of power machinery and fluid measurement, and aims to provide a pulverized coal mixing device which has a simple and reasonable structure, ensures that pulverized coal and air are uniformly mixed and can eliminate the pulsation. The technical scheme is that: a high-pressure pulverized coal inlet flange is arranged at an opening of the top of a volute; two sides of the volute are connected with machine shells; a straight-through closed impeller is positioned in the volute; two sides of the straight-through closed impeller are connected with hollow shafts which are arranged in the opposite machine shells through bearings; and an air inlet flange and an air outlet flange are connected to the two machine shells respectively and are communicated with the two hollow shafts respectively. The machine is mainly used for the mixing, power generation and flow measurement of the high-pressure pulverized coal.
Description
Technical field
Coal dust mixing device of the present invention, relate to a kind of novel powder power machine that coal dust mixing, energy recovery and recycling, pulverized coal flow are measured that integrates, specially refer to collection and the reutilization technology of high pressure coal dust energy, belong to the technical field that power machine and fluid measurement combine.
Background technology
In bf coal injection system, main jet-type and the boiling type coal, pulverulent fuel mixer of adopting, jet mixer is adopt the earliest a kind of, utilizes blowing tank pressure and injection gas that coal dust is transferred out, production efficiency is extremely low, and the coal powder density that transfers out is also lower and have a pulsation phenomenon; The boiling type coal, pulverulent fuel mixer is that the day present technique that Baosteel is introduced is made, be provided with fluidisation air chamber and secondary air compensating device, coal dust homogenizing degree improves greatly, the pulse phenomenon of mixer outlet reduces greatly, improved transport capacity, but when reducing injecting coal quantity, needing increases air compensation, and energy dissipation is serious.And according in the breeze blowing technology when the continuous winding-up needs pressure in the winding-up jar carried out constant voltage regulate, namely the coal dust in the winding-up jar keeps high pressure always, the high pressure coal dust enters mixing tank by following coal valve to be mixed with high-pressure air, and the entrained energy of coal dust is passed into the high pressure gas of mixing tank and offsets and slattern.In bf coal injection system, LOAD CELLS is generally adopted in the measurement of coal powder blowing amount simultaneously, and there is very mistake in the pulverized coal flow of measuring.In addition, utilize the powder generating, the power machine of powder as propulsion source do not related in traditional industrial production field.
In sum, how can more effective coal dust and high pressure gas be mixed, and be to enhance productivity, save the energy in bf coal injection system and even the industrial production and reduce importance and the research topic that consumes with coal dust energy recovery utilization and the flow that accurately measures coal dust.
Summary of the invention
The present invention overcomes the deficiency that prior art exists, and technical problem to be solved has provided a kind of simple and reasonable, and coal dust and air mixed are even, can eliminate the coal dust mixing device of pulsation.
For solving the problems of the technologies described above, the technical solution adopted in the present invention is: the coal dust mixing device, comprise: spiral case, straight-through trash-type impeller, tubular shaft and casing, the top open part of spiral case is provided with high pressure coal dust suction flange, the both sides of spiral case all are connected with casing, straight-through trash-type impeller is positioned at the inside of spiral case, the both sides of straight-through trash-type impeller all are connected with tubular shaft, two tubular shafts are installed in the corresponding casing by bearing, inlet flange and exhaust flange are connected on two casings, and inlet flange and exhaust flange are communicated with two tubular shafts respectively;
The structure of described straight-through trash-type impeller is: two impeller plates arrange with one heart, and a plurality of impeller blades are radial and evenly are arranged between two impeller plates; The center of described straight-through trash-type impeller has the through hole of penetration type, and described through hole is communicated with two tubular shafts, thereby the Ye Daojun between per two impeller blades is communicated with two tubular shafts.
Rotor is all fixedly arranged on described each tubular shaft, and described casing is equipped with motor stator on the position corresponding with rotor.
Described inlet flange place is equipped with the flow monitoring device.
The quantity of described impeller blade is 6.
The present invention compared with prior art has following beneficial effect.
1, the present invention promotes straight-through trash-type impeller rotation by the high pressure coal dust, the generating of generator amature cutting magnetic induction line, the generating of realization powder, straight-through trash-type impeller and generator amature are integrated, the pressure energy of coal dust directly is converted to the mechanical energy of rotor rotation, reduce energy waste, taken full advantage of the pressure energy of coal dust, realized the recycling of coal dust pressure energy.
2, mesohigh coal dust of the present invention is pressed into spiral case from coal dust pot and enters straight-through trash-type impeller, and coal dust enters in the tubular shaft from a plurality of leaves road, utilizes the hyperchannel shunting principle, and coal dust and high-pressure air can be mixed, and reduces so that eliminates pulsation.
3, the present invention records the flow of high-pressure air by at the inlet flange place flow measurement device being installed, and records behind the rotating speed of rotor by calculating the flow that can precisely measure coal dust again.
Description of drawings
The invention will be further described below in conjunction with accompanying drawing.
Fig. 1 is structural representation of the present invention.
Fig. 2 is the sectional view of Fig. 1.
Fig. 3 is the structural representation of the utility model generator amature and straight-through trash-type impeller.
Among the figure: 1 is that spiral case 1,2 is straight-through trash-type impeller, and 3 is tubular shaft, and 4 is casing, and 5 is impeller plate, and 6 is impeller blade, and 7 is rotor, and 8 is inlet flange, and 9 is exhaust flange, and 10 is bearing, and 11 is high pressure coal dust suction flange.
Embodiment
As Fig. 1, Fig. 2 and shown in Figure 3, the coal dust mixing device, comprise: spiral case 1, straight-through trash-type impeller 2, tubular shaft 3 and casing 4, the top open part of spiral case 1 is provided with high pressure coal dust suction flange 11, the both sides of spiral case 1 all are connected with casing 4, straight-through trash-type impeller 2 is positioned at the inside of spiral case 1, the both sides of straight-through trash-type impeller 2 all are connected with tubular shaft 3, two tubular shafts 3 are installed in the corresponding casing 4 by bearing 10, inlet flange 8 and exhaust flange 9 are connected on two casings 4, and inlet flange 8 and exhaust flange 9 are communicated with two tubular shafts 3 respectively;
The structure of described straight-through trash-type impeller 2 is: two impeller plates 5 arrange with one heart, and a plurality of impeller blades 6 are radial and evenly are arranged between two impeller plates 5; The center of described straight-through trash-type impeller 2 has the through hole of penetration type, and described through hole is communicated with two tubular shafts 3, thereby the Ye Daojun between per two impeller blades 6 is communicated with two tubular shafts 3.
On described each tubular shaft 3 rotor 7 is arranged fixedly all, described casing 4 and rotor 7 are equipped with motor stator on the corresponding position.
Described inlet flange 8 places are equipped with the flow monitoring device.
The quantity of described impeller blade 6 is 6.
Among the present invention, between spiral case 1 and the straight-through trash-type impeller 2 tightness system must be arranged, make the coal dust that high pressure coal dust suction flange 11 is come in from the spiral case 1 can only enter into straight-through trash-type impeller 2; Also tightness system must be arranged between inlet flange 8 and exhaust flange 9 and the rotation axis 3, make high-pressure air all enter in the tubular shaft 3 from inlet flange 8, carry behind the coal dust and all discharge from exhaust flange 9.
Bf coal injection system mainly is made up of several parts such as raw coal storing, pulverized coal preparation, breeze blowing, hot flue gas and air feed.According to breeze blowing technology, breeze blowing normally fills with high pressure nitrogen in winding-up jar group, introduces pressurized air at mixing tank coal dust is sprayed into blast-furnace tuyere through pipeline and spray gun.The breeze blowing jar need be through dress powder, pressurize, winding-up and four technological processs of release, and constant in pressurize and blowing process process need maintenance tank pressure, this process realizes by master control system.Pressurized air is behind mixing tank simultaneously, and gas carries coal dust and arrives spray gun through pipeline.The high pressure coal powder pipeline is connected with spiral case 1 by flange during winding-up, and the high-pressure air pipeline is connected with tubular shaft 3 by inlet flange 8, and the spray gun pipeline is connected with the tubular shaft 3 of opposite side by exhaust flange 9; High pressure coal dust in the winding-up jar is after receiving the winding-up order that master control system sends, following coal valve is opened, the high pressure coal dust enters in the spiral case 1, convergent cross section step-down speedup by spiral case 1, the high pressure coal dust enters in the straight-through trash-type impeller 2 by a plurality of leaves road that is made of impeller plate 5 and impeller blade 6, simultaneously high-pressure air by inlet flange 8 from axially entering in the tubular shaft 3, mix with coal dust in the part that straight-through trash-type impeller 2 is communicated with tubular shaft 3, the gas mixture of coal dust and high-pressure air enters into the spray gun pipeline by exhaust flange, jets at last in blast furnace; Because high-pressure air is to blow side to opposite side from one of straight-through trash-type impeller 2, this just makes the coal dust that enters in the straight-through trash-type impeller 2 only move to a direction in tubular shaft 3.
In said process, coal dust drives straight-through trash-type impeller 2 rotations to straight-through trash-type impeller 2 actings, and the pressure energy of coal dust is changed into the mechanical energy that straight-through trash-type impeller 2 rotates; Tubular shaft 3 and the generator amature 7 on it are along with straight-through trash-type impeller 2 rotates together, and the mechanical energy that straight-through trash-type impeller 2 is rotated is converted into electric energy, has realized the recycling of coal dust pressure energy.
The present invention can record the flow of high-pressure air by flow measurement device is installed at inlet flange 8 places; The mechanical energy that pressure energy transforms can be calculated by rotating speed and the torque of straight-through trash-type impeller 2; By law of conservation of energy, coal dust is mechanical energy and the energy waste sum that leads directly to trash-type impeller 2 at the energy at spiral case inlet place and the energy difference at discharge flange 9 places.Coal dust can be thought the pressure energy of coal dust at the energy at spiral case inlet place; The fluctuations in discharge of high-pressure air can reflect discharge flange place coal dust energy remaining before mixing, and can record the flow of coal dust by the measurement to the measurement of rotor speed and air flow quantity.
Claims (4)
1. coal dust mixing device, comprise: spiral case (1), straight-through trash-type impeller (2), tubular shaft (3) and casing (4), it is characterized in that: the top open part of spiral case (1) is provided with high pressure coal dust suction flange (11), the both sides of spiral case (1) all are connected with casing (4), straight-through trash-type impeller (2) is positioned at the inside of spiral case (1), the both sides of straight-through trash-type impeller (2) all are connected with tubular shaft (3), two tubular shafts (3) are installed in the corresponding casing (4) by bearing (10), inlet flange (8) and exhaust flange (9) are connected on two casings (4), and inlet flange (8) and exhaust flange (9) are communicated with two tubular shafts (3) respectively;
The structure of described straight-through trash-type impeller (2) is: two impeller plates (5) arrange with one heart, and a plurality of impeller blades (6) are radial and evenly are arranged between two impeller plates (5); The center of described straight-through trash-type impeller (2) has the through hole of penetration type, and described through hole is communicated with two tubular shafts (3), thereby the Ye Daojun between per two impeller blades (6) is communicated with two tubular shafts (3).
2. coal dust mixing device according to claim 1 is characterized in that: rotor (7) is all fixedly arranged on described two tubular shafts (3), and described casing (4) is equipped with motor stator on the position corresponding with rotor (7).
3. coal dust mixing device according to claim 1 and 2, it is characterized in that: described inlet flange (8) locates to be equipped with the flow monitoring device.
4. coal dust mixing device according to claim 1 and 2, it is characterized in that: the quantity of described impeller blade (6) is 6.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012101881430A CN102703630B (en) | 2012-06-08 | 2012-06-08 | Pulverized coal mixing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012101881430A CN102703630B (en) | 2012-06-08 | 2012-06-08 | Pulverized coal mixing device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102703630A CN102703630A (en) | 2012-10-03 |
| CN102703630B true CN102703630B (en) | 2013-09-25 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012101881430A Active CN102703630B (en) | 2012-06-08 | 2012-06-08 | Pulverized coal mixing device |
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Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| IT1073325B (en) * | 1976-10-01 | 1985-04-17 | Worthington Pump | IMPROVEMENTS FOR CENTRIFUGAL PUMPS WITH AUXILIARY SUPPLY IMPELLER AND RELATED IMPROVED PUMPS |
| CN201572612U (en) * | 2009-12-08 | 2010-09-08 | 尹延喜 | Spiral-flow type coal dust mixer |
| CN202253713U (en) * | 2011-08-30 | 2012-05-30 | 湖南晟通科技集团有限公司 | Full-negative-pressure pulverized coal mixer |
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| CN102703630A (en) | 2012-10-03 |
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