CN102419109B - Contact type high-efficiency cooling and dedusting device and method - Google Patents
Contact type high-efficiency cooling and dedusting device and method Download PDFInfo
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- CN102419109B CN102419109B CN 201110352138 CN201110352138A CN102419109B CN 102419109 B CN102419109 B CN 102419109B CN 201110352138 CN201110352138 CN 201110352138 CN 201110352138 A CN201110352138 A CN 201110352138A CN 102419109 B CN102419109 B CN 102419109B
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Abstract
The invention belongs to the field of waste gas cooling and dedusting of vacuum refining systems, and particularly discloses a contact type high-efficiency cooling and dedusting device and a contact-type high-efficiency cooling and dedusting method. The device is characterized in that: a vacuum container is divided into two paths which are connected with a primary condenser by a main extraction pipeline; in a first path, the main extraction pipeline reaches a first inlet of the primary condenser after sequentially passing through a main vacuum valve and a booster pump, and in a second path, the main extraction pipeline reaches a second inlet of the primary condenser after sequentially passing through a bypass vacuum valve, a bypass cooling and dedusting pipeline, a water cooling deduster and a waste gas exhaust pipeline; and an output port of the primary condenser reaches an atmosphere exhaust pipe through a jet pump and a secondary condenser. By the device and the method, waste gases produced by high-temperature steelmaking can be cooled and dedusted in molten steel treatment.
Description
Technical field
The invention belongs to the waste gas cooling and dedusting category of vacuum refining system, is contact type high-efficiency cooling and dedusting device and method exactly, is adapted to the cooling of steel-making waste gas and dedusting.
Background technology
Contact type high-efficiency cooling and dedusting device is widely used in VD, VC, VOD, RH equal vacuum rectification systems.Because this device is operation in high temperature and vacuum environment, when molten steel is handled, the steel-making EGT height of discharge, dust content is big, very big to the influence of vacuum pump system service behaviour, so rectification systems all need arrange necessary waste gas cooling and dedusting device.Traditional cooling and dedusting device adopts be indirect type cool+dedusting of centrifugation formula or indirect type cool+the cloth-bag type dedusting method.At first; because traditional waste gas cooling and dedusting unit efficiency is low; when failing booster pump by vacuum pump system of the high-temperature dust waste gas of filtering; meeting cold wet condition can adhere on the pump inwall; after system operation a period of time, pump inwall dust stratification increases, reach certain thickness after; will have a strong impact on pump performance, force the equipment downtime maintenance and safeguard.Secondly, because traditional waste gas cooling and dedusting device can produce bigger pressure drop to vacuum system, therefore can produce certain influence to the performance of vacuum system, need consider bigger exhaust capacity during the design vacuum pump system, increase cost of investment.In sum, invent a kind of direct contact type, efficiently, easy cooling and dedusting device reliable, that investment cost is few, operation expense is low is very important.
Summary of the invention
The objective of the invention is to design a kind of have contact, efficient, easy reliable, small investment, contact type high-efficiency cooling and dedusting device and method that system's operation expense is low, in order to can the waste gas that high temperature steel-making produces be cooled off and dedusting when molten steel is handled carrying out.
For achieving the above object, technical scheme of the present invention is, contact type high-efficiency cooling and dedusting device, it is characterized in that: vacuum tank is divided into two-way by the trunk line of bleeding and is connected with first order condenser, and the first via is to bleed trunk line successively by main vacuum valve and booster pump first entrance to first order condenser; The second the tunnel is to bleed trunk line successively by bypass vacuum valve, bypass cooling and dedusting pipeline, water-cooled cooling and dedusting device, exhaust emission pipe second entrance to first order condenser; First order condenser output port through jet pump, second level condenser to the atmosphere comb.
Dust collection method based on contact type high-efficiency cooling and dedusting device, its method is: at the trunk line of bleeding to increasing the bypass pump-line between the first order condenser, bleed and main vacuum valve and bypass vacuum valve respectively are installed on trunk line and the bypass pump-line, in order to the bleed on off operating mode of trunk line or bypass pump-line of switching;
Under the low vacuum operating mode, main vacuum valve is in closed condition, the bypass vacuum valve is opened, bleed trunk line and bypass cooling and dedusting pipeline UNICOM, the jet pump of vacuum pump system is bled to vacuum tank, and steel-making waste gas is avoided booster pump and is disposed in the first order condenser through bypass cooling and dedusting pipeline, water-cooled cooling and dedusting device; Make waste gas by-passing loop, carry out coarse filtration dirt and cooling through the cooling and dedusting pipeline, finish secondary smart filter dirt and cooling through contact cooling and dedusting device again, dust in the waste gas is close to fully removes, and below the operating temperature that temperature is down to allow;
In high vacuum stage of Fig, the bypass vacuum valve cuts out, and main vacuum valve is opened, bleed trunk line and booster pump UNICOM; Reach waste gas dedusting and cooling by the direct contact of air water.
Because in the low vacuum stage, the molten steel reaction is in the strongest state, and the technology waste gas amount is maximum duty, passes through booster pump if waste gas is responsible for through bleeding, exhaust gas and dust can adhere on the booster pump inwall in a large number, will have a strong impact on the operate as normal of vacuum pump system when thickness is accumulated to a certain degree.For effectively reducing the dust in the waste gas, under this operating mode, switch by valve, because the waste gas peak phase is without booster pump, the pump inwall does not almost have dust adhesion, it is low therefore to greatly reduce system's operation expense.
The present invention has taked the mentality of designing different with conventional method, not only guaranteed dedusting efficiently but also have better cooling function concurrently, design cleverly simultaneously and simple parts have guaranteed the reliability of device.
Description of drawings
The invention will be further described below in conjunction with the embodiment accompanying drawing:
Fig. 1 is the invention process structural representation.
Among the figure: 1, vacuum tank; 2, the trunk line of bleeding; 3, main vacuum valve; 4, first order condenser; 5, second level condenser; 6, booster pump; 7, jet pump; 8, bypass vacuum valve; 9, bypass cooling and dedusting pipeline; 10, water-cooled cooling and dedusting device; 11, exhaust emission pipe; 12, atmosphere comb.
The specific embodiment
As shown in Figure 1, contact type high-efficiency cooling and dedusting device, vacuum tank 1 is divided into two-way by the trunk line 2 of bleeding and is connected with first order condenser 4, and the first via is that bleed trunk line 2 successively arrives first entrance of first order condenser 4 by main vacuum valve 3 and booster pump 6; The second the tunnel is to bleed trunk line 2 successively by bypass vacuum valve 8, bypass cooling and dedusting pipeline 9, water-cooled cooling and dedusting device 10, exhaust emission pipe 11 second entrance to first order condenser 4; First order condenser 4 output ports through jet pump 7, second level condenser 5 to atmosphere comb 12.
Dust collection method based on contact type high-efficiency cooling and dedusting device, at the trunk line 2 of bleeding to increasing the bypass pump-line between the first order condenser 4, bleeding respectively is equipped with a vacuum valve (main vacuum valve 3 and bypass vacuum valve 8) on trunk line 2 and the bypass pump-line, in order to the bleed on off operating mode of trunk line 2 or bypass pump-line of switching.The 2 fens first via of trunk line of just bleeding and the second tunnel are in order to switch.
Under the low vacuum operating mode, main vacuum valve 3 is in closed condition, bypass vacuum valve 8 is opened, bleed trunk line 2 and bypass cooling and dedusting pipeline 9 UNICOMs, 7 pairs of vacuum tanks 1 of the jet pump of vacuum pump system are bled, steel-making waste gas is avoided booster pump 6 through bypass cooling and dedusting pipeline 9, water-cooled cooling and dedusting device 10 is disposed in the first order condenser 4, make waste gas by-passing loop, carry out coarse filtration dirt and cooling through the cooling and dedusting pipeline, finish secondary smart filter dirt and cooling through contact cooling and dedusting device again, dust in the waste gas is close to fully removes, avoided booster pump 6 inwall dust adhesion, and below the operating temperature that EGT is down to allow.
In high vacuum stage of Fig, bypass vacuum valve 8 cuts out, and main vacuum valve 3 is opened, bleed trunk line 2 and booster pump 6 UNICOMs, and the steel-making exhausted air quantity of the booster pump 6 of flowing through greatly reduces, and the Dust Capacity that the pump inwall adheres to reduces greatly.
In the low vacuum stage, the molten steel reaction is in the strongest state, and the technology waste gas amount is maximum duty, passes through booster pump if waste gas is responsible for through bleeding, exhaust gas and dust can adhere on the booster pump inwall in a large number, will have a strong impact on the operate as normal of vacuum pump system when thickness is accumulated to a certain degree.For effectively reducing the dust in the waste gas, under this operating mode, switch by valve, make waste gas by-passing loop, carry out coarse filtration dirt and cooling through the cooling and dedusting pipeline, finish secondary smart filter dirt and cooling through contact cooling and dedusting device again, dust in the waste gas is close to fully removes, and below the operating temperature that temperature is down to allow.Because the waste gas peak phase is without booster pump, the pump inwall does not almost have dust adhesion, and it is low therefore to greatly reduce system's operation expense.
In high vacuum stage of Fig, the molten steel reaction is faint, and the technology waste gas amount greatly reduces, and dust content descends greatly, and the influence of pump inwall binding dust has become insignificant.Can better reach the effect of waste gas dedusting and cooling by the direct contact of air water, guarantee the stability of vavuum pump work.
Claims (1)
1. the dust collection method of contact type high-efficiency cooling and dedusting device, its method is: at the trunk line of bleeding (2) to increasing the bypass pump-line between the first order condenser (4), bleed and main vacuum valve (3) and bypass vacuum valve (8) respectively are installed on trunk line (2) and the bypass pump-line, in order to the bleed on off operating mode of trunk line (2) or bypass pump-line of switching;
Under the low vacuum operating mode, main vacuum valve (3) is in closed condition, bypass vacuum valve (8) is opened, bleed trunk line (2) and bypass cooling and dedusting pipeline (9) UNICOM, the jet pump of vacuum pump system (7) is bled to vacuum tank (1), and steel-making waste gas is avoided booster pump (6) and is disposed in the first order condenser (4) through bypass cooling and dedusting pipeline (9), water-cooled cooling and dedusting device (10); Make waste gas by-passing loop, carry out coarse filtration dirt and cooling through the cooling and dedusting pipeline, finish secondary smart filter dirt and cooling through contact cooling and dedusting device again, dust in the waste gas is close to fully removes, and below the operating temperature that temperature is down to allow;
In high vacuum stage of Fig, bypass vacuum valve (8) cuts out, and main vacuum valve (3) is opened, the trunk line of bleeding (2) and booster pump (6) UNICOM; Reach waste gas dedusting and cooling by the direct contact of air water;
The vacuum tank (1) of this contact type high-efficiency cooling and dedusting device is divided into two-way by the trunk line of bleeding (2) and is connected with first order condenser (4), and the first via is that the trunk line (2) of bleeding successively arrives first entrance of first order condenser (4) by main vacuum valve (3) and booster pump (6); The second the tunnel is to bleed trunk line (2) successively by bypass vacuum valve (8), bypass cooling and dedusting pipeline (9), water-cooled cooling and dedusting device (10), exhaust emission pipe (11) second entrance to first order condenser (4); First order condenser (4) output port through jet pump (7), second level condenser (5) to atmosphere comb (12).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110352138 CN102419109B (en) | 2011-11-09 | 2011-11-09 | Contact type high-efficiency cooling and dedusting device and method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110352138 CN102419109B (en) | 2011-11-09 | 2011-11-09 | Contact type high-efficiency cooling and dedusting device and method |
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| Publication Number | Publication Date |
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| CN102419109A CN102419109A (en) | 2012-04-18 |
| CN102419109B true CN102419109B (en) | 2013-07-03 |
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| CN 201110352138 Expired - Fee Related CN102419109B (en) | 2011-11-09 | 2011-11-09 | Contact type high-efficiency cooling and dedusting device and method |
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| CN104120214B (en) * | 2014-07-31 | 2016-04-27 | 中国重型机械研究院股份公司 | A kind of hybrid vacuum pump system |
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| JP4262428B2 (en) * | 2001-11-05 | 2009-05-13 | 新日本製鐵株式会社 | Water leak detection method in metallurgical furnace |
| CN201354379Y (en) * | 2009-02-27 | 2009-12-02 | 鞍山创新实业有限公司 | Novel vacuum refining furnace |
| JP5550063B2 (en) * | 2009-03-17 | 2014-07-16 | 独立行政法人日本原子力研究開発機構 | Molten metal processing equipment |
| CN201501904U (en) * | 2009-08-26 | 2010-06-09 | 宝山钢铁股份有限公司 | Vacuum regulating device for vacuum refining furnace |
| CN202382584U (en) * | 2011-11-09 | 2012-08-15 | 中国重型机械研究院有限公司 | Contacting efficient cooling dedusting device |
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