CN1271336C - Hot coal gas pressurized fans gas flow sealing device - Google Patents
Hot coal gas pressurized fans gas flow sealing device Download PDFInfo
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- CN1271336C CN1271336C CN 02110416 CN02110416A CN1271336C CN 1271336 C CN1271336 C CN 1271336C CN 02110416 CN02110416 CN 02110416 CN 02110416 A CN02110416 A CN 02110416A CN 1271336 C CN1271336 C CN 1271336C
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- coal gas
- impeller
- hot coal
- fans
- gas pressurized
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Abstract
The present invention relates to a hot coal gas pressurized fan gas flow sealing device which belongs to the technical field of fluid machinery. A shaft disc of a centrifugal impeller is provided with through holes to penetrate a negative pressure area between a back disc of the impeller and a back side plate of a fan shell on a space near a main shaft and a fan wind inlet. When the impeller rotates, the negative pressure area is formed on the area near the main shaft between the back disc of the impeller and the back side plate of the fan shell. In addition, a sealing assembly on the outer side of a main shaft hole on the fan shell is matched for ensuring that coal gas can not leak outwards in the process of operation of a fan. Simultaneously, the present invention prevents outside air from entering the fan to achieve the goals of prevention of poison and explosion and safe operation. The present invention has the advantages of simple and compact structure, good sealing effect, safety and reliability. The technique is suitable for hot coal gas pressurized fans. Simultaneously, the technique is also suitable for cold coal gas pressurized fans and centrifugal fans for transporting other high-temperature gas or poisonous gas.
Description
Technical field
The present invention relates to a kind of hot coal gas pressurized fans, belong to the fluid machinery technical field.
Background technique
At present, the coal gas delivery method that the home and abroad is used can be divided into two big classes basically according to the pattern of gas producer.The first produces heating gas from the unistage type gas producer, to normal temperature coal gas, adopts Roots blower or centrifugal fan pressurized delivered through two vertical tube water-cooled coolings, electrical tar precipitator, stuffing washing tower, water separator, sewage treatment; It two is to produce heating gas by two stage type gas generating furnace, top coal gas is through electrical tar precipitator, bottom coal gas enters the oil wash device through converging with top coal gas after the dedusting, air cooler, catch light oil through two-stage electric fishing device again, handle tar, phenol and light oil to normal temperature coal gas, adopt Roots blower or centrifugal fan pressurized delivered equally.This all will cause: the one, and one-time investment is big, and particularly heating gas cooling back coal tar oil condensation must be taked electric fishing Jiao, sewage treatment or carbolic oil burning facility are set, and system architecture complexity, floor space are big, and the equipment maintenance and management link is many, and is costly; The 2nd, normal temperature coal gas density is big, and transmitting power consumes high, adds the energy consumption that prime is handled, and causes unit day-to-day operation expense costliness; The 3rd, the optional kind of pressure blower of directly carrying at present heating gas very little, operational reliability is poor, so that invests and the phenomenon long-term existence of the energy like this waste.Though a small amount of this technology is now arranged, prior art has number of patent application to be: the boosting centrifugal blower of the conveying coal gas of ZL00208078.8 and number of patent application are the boosting centrifugal blower of the conveying heating gas of ZL00208079.6, no matter be hot coal gas pressurized fans, still the cooled coal gas pressure blower all adopts auxiliary blade and catheter type gas flow sealing device.Prior art is thought, is welded on the auxiliary blade on the impeller hub disk, can cause negative pressuren zone near the reel place between impeller hub disk and casing, and this is practically impossible.Because impeller blade is to the acting ability N=ρ Q of gas
Tω (r
2C2u-r
1C1u), and auxiliary blade is provided with sealing group because of main shaft and casing place, then its inlet/outlet place does not have the air flow stream mistake, be C1u=C2u=0, auxiliary blade just is zero to the acting ability of gas so, that is to say that auxiliary blade does not do work to gas in rotary course, caused not having pressure difference between its inlet/outlet, that is to say that the pressure at auxiliary blade inlet/outlet place equates.Impeller blade equates that with the radius of auxiliary blade outlet then the pressure in its outlet port also must equate in the prior art, is generally the malleation of 6000～23000Pa.By above analysis as can be known, auxiliary blade inlet also is the malleation of 6000～23000Pa near the pressure at reel place promptly.Thus, to cause negative pressuren zone be impossible to auxiliary blade near the reel place between impeller hub disk and casing.Even sealing group or poorly sealed close is not set at main shaft and casing place, exist the gap of trace to leak out, promptly C1u, C2u are not equal to zero, and this moment, impeller blade and auxiliary blade were respectively the acting ability of gas:
N
1＝ρQ
T1ω(r
2C2u-r
1C1u)——————(1)
N
f＝ρQ
Tfω(r
2C2u-r
1C1u)——————(2)
Inleakage Q in the formula
TfBe the air quantity that passes through of auxiliary blade, pass through air quantity Q than impeller blade
T1Little tens times or several one hundred times, by (1), (2) two formulas more as can be known, its acting ability to gas will be far smaller than the acting ability of impeller blade, the pressure difference that causes at its inlet/outlet place is very little, this shows that it also is impossible that auxiliary blade causes negative pressuren zone near the reel place between impeller hub disk and casing.Catheter type gas flow sealing device complex structure, Seal Kit machining accuracy height, the one, the manufacture cost of increase blower fan, the 2nd, realize that aborning difficulty is big.
Summary of the invention
The objective of the invention is to overcome the deficiency of prior art, a kind of simple and compact for structure, good sealing effect, safe and reliable hot coal gas pressurized fans are provided, do not increase the blower fan manufacture cost, can prevent effectively that the gas in the blower fan from leaking from spindle hole, reach gas defence, explosion-proof, antipollution effect, can stop ambient air to leak inwards and the coal gas blending again effectively along main shaft.
The objective of the invention is to realize as follows:
Described hot coal gas pressurized fans, comprise receded disk impeller in the casing, casing, be fixed on the sealing group in the spindle hole outside on disk center behind the receded disk impeller and reel that matches with main shaft and the casing, it is characterized in that the hub disk of said receded disk impeller and the junction plane position of reel or the junction plane position of reel hub and spindle nose gland offer through hole jointly.
Through hole makes between impeller hub disk and the casing back side panel and connects near the space of main shaft and the negative pressuren zone at air inlet place, when impeller rotates, because the pressure release effect of through hole, make that near the zone main shaft also forms negative pressuren zone between impeller hub disk and the casing back side panel, guarantee that coal gas can not leak from spindle hole.
The sealing group of spindle hole arranged outside on the casing can stop ambient air to leak inwards from spindle hole effectively, avoids air and coal gas blending.
Above-mentioned hot coal gas pressurized fans, said sealing group be by the tubular overcoat that is fixed on the casing of the spindle hole outside, and the stuffing box packing in the overcoat and the interior cover that stuffing box packing is compressed between outer casing inner wall and the main shaft that matches with overcoat are formed.
Above-mentioned hot coal gas pressurized fans, the quantity and the size of the through hole of offering, should make the zone of close main shaft between impeller hub disk and the casing back side panel when impeller rotates, form the suitable negative pressuren zone of pressure, guarantee the running intensity of receded disk impeller and the balance of working life and impeller again.Set through hole has several, and the garden that is distributed on receded disk impeller hub disk and reel junction plane or reel hub and spindle nose gland junction plane is on week.
Above-mentioned hot coal gas pressurized fans, said receded disk impeller preferably adopt refractory steel, stainless steel or industrial ceramic material manufacturing.
Stuffing box packing in the above-mentioned hot coal gas pressurized fans in the said overcoat is preferably adopted the Expanded graphite seal ring, or is soaked the packing of plumbago.
The present invention compared with prior art, one has provided a kind of brand-new principle and design, simple and compact for structure, good sealing effect, safe and reliable, under the prerequisite that does not increase the blower fan manufacture cost, both solved the problem that the coal gas in the blower fan leaks from spindle hole effectively, reach gas defence, explosion-proof, antipollution effect, can stop ambient air to leak inwards and the coal gas blending again effectively, avoid the danger of blasting along spindle hole; The 2nd, save water-cooling apparatus in the background technique, electric fishing coke installation, wash mill, electric fishing oil device, sewage treatment facility or oily phenol treatment facility, the investment of gas station is forced down to original about 20%; The 3rd, blower fan is directly carried the little heating gas of density, can save power consumption 52～60%; The 4th, can avoid the energy consumption of prime processing system, have considerable energy saving and consumption reduction effect.This technology also can be widely used in the centrifugal fan of cooled coal gas pressure blower and conveying other high temperature, normal temperature or toxic gas except being applicable to hot coal gas pressurized fans.
Description of drawings
The present invention will be further described below in conjunction with embodiment's accompanying drawing:
Fig. 1 is the gas pressure blower plan view.
Fig. 2 is the gas pressure blower plan view.
Fig. 3 is gas pressure blower sealing position partial structurtes figure.
Fig. 4 is the receded disk impeller structural drawing in the gas pressure blower.
Among the figure: the negative pressuren zone that 1 casing, 2 impellers, 3 front shrouds, 4 sealing group, 5 heat-insulating casings, 6 thermal insulating fillings, 7 drain pipes, 8 are centrifugally air-cooledly taken turns, 9 front-end bearing pedestals, the air-cooled hub cap of 10 axial flows, 11 axial flows are air-cooledly taken turns, 12 main shafts, 13 rear bearing blocks, 14 coupling, 15 coupling guards, 16 anti-explosion motors, 17 supports, 18 steam-gas inlets, 19 stuffing box packing, 20 through holes, 21 spindle nose glands, 22 hub disks, 23 blades, 24 shrouds, 25 reel hubs, 26 reels, N cause for the present invention.
Embodiment
As shown in the figure, hot coal gas pressurized fans of the present invention, comprise receded disk impeller 2 in the casing 1, casing 1, be fixed on the sealing group 4 in the spindle hole outside on the center of hub disk 22 of impeller 2 and reel 25 that matches with main shaft 12 and the casing 1, offer a through hole or several through holes 20 at the hub disk 22 and the junction plane position of reel 26, these some through holes 20 preferably are distributed on the garden at this position on week, for example can offer two to eight through holes, present embodiment has been offered four through holes 20.Through hole 20 makes between impeller hub disk 22 and the casing back side panel and connects near the space of main shaft 12 and the negative pressuren zone at air inlet 3 places, when impeller 2 rotations, because the pressure release effect of through hole 20, make that near the zone main shaft 12 also forms negative pressuren zone between the hub disk 22 of impeller 2 and the casing back side panel, size that through hole 20 is offered and quantity should be accomplished, should make the space of close main shaft 12 between impeller hub disk 22 and the casing back side panel when impeller 2 rotations, form the suitable negative pressuren zone of pressure, guarantee running intensity, working life and the balance quality of impeller 2 again.The suitable negative pressure of so-called pressure is meant that this negative pressure can be enough to prevent that coal gas from leaking from spindle hole is to spend, in order to guarantee that impeller 2 has enough resistance to high temperature and intensity, rigidity, make impeller and can select various high temperature resistant and metal or nonmetallic material that intensity is enough for use, for example can select materials such as various refractory steel, stainless steel or industrial ceramics for use.The sealing group in the spindle hole outside is by the tubular overcoat that is fixed on the housing on the casing 1, stuffing box packing 19 in the overcoat and match with overcoat stuffing box packing is compressed in outer casing inner wall and main shaft 12, between interior cover form, the stuffing box packing 19 of being washed adopts Expanded graphite seal ring or employing to soak the packing of plumbago, the friction that sealing filler and main shaft are 12 is very little, greatly reduces the power consumption of blower fan.
The position of through hole can also be opened in the junction plane position of reel hub 25 and spindle nose gland 21 in the foregoing description, and this is another embodiment of the present invention.
Claims (6)
1, a kind of hot coal gas pressurized fans, comprise receded disk impeller in the casing, casing, be fixed on the sealing group in the spindle hole outside on disk center behind the receded disk impeller and reel that matches with main shaft and the casing, it is characterized in that the hub disk of said receded disk impeller and the junction plane position of reel offer through hole jointly.
2, according to the said hot coal gas pressurized fans of claim 1, it is characterized in that sealing group by the tubular overcoat that is fixed on the casing of the spindle hole outside, the stuffing box packing in the overcoat and the interior cover that stuffing box packing is compressed between outer casing inner wall and the main shaft that matches with overcoat are formed.
3, according to claim 1 or 2 said hot coal gas pressurized fans, it is characterized in that through hole has several, be distributed on receded disk impeller hub disk and the reel junction plane.
4,, it is characterized in that said receded disk impeller is to adopt refractory steel, stainless steel or industrial ceramic material manufacturing according to the said hot coal gas pressurized fans of claim 3.
5,, it is characterized in that said stuffing box packing is the Expanded graphite seal ring according to the said hot coal gas pressurized fans of claim 3.
6,, it is characterized in that said stuffing box packing is the packing that soaks plumbago according to the said hot coal gas pressurized fans of claim 3.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02110416 CN1271336C (en) | 2002-05-23 | 2002-05-23 | Hot coal gas pressurized fans gas flow sealing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02110416 CN1271336C (en) | 2002-05-23 | 2002-05-23 | Hot coal gas pressurized fans gas flow sealing device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1459574A CN1459574A (en) | 2003-12-03 |
| CN1271336C true CN1271336C (en) | 2006-08-23 |
Family
ID=29426305
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 02110416 Expired - Fee Related CN1271336C (en) | 2002-05-23 | 2002-05-23 | Hot coal gas pressurized fans gas flow sealing device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1271336C (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109578314A (en) * | 2017-09-28 | 2019-04-05 | 镇江日泰生物工程设备有限公司 | Anti- dust leakage device |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2020019143A1 (en) * | 2018-07-23 | 2020-01-30 | 深圳市能源环保有限公司 | Odor-resistant sealing device of centrifugal fan of waste incineration power plant |
-
2002
- 2002-05-23 CN CN 02110416 patent/CN1271336C/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109578314A (en) * | 2017-09-28 | 2019-04-05 | 镇江日泰生物工程设备有限公司 | Anti- dust leakage device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1459574A (en) | 2003-12-03 |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20060823 Termination date: 20120523 |