CN1053372A - Improve the device of the qualification rate of condensation water of evaporator in alumina plant - Google Patents
Improve the device of the qualification rate of condensation water of evaporator in alumina plant Download PDFInfo
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- CN1053372A CN1053372A CN 90107536 CN90107536A CN1053372A CN 1053372 A CN1053372 A CN 1053372A CN 90107536 CN90107536 CN 90107536 CN 90107536 A CN90107536 A CN 90107536A CN 1053372 A CN1053372 A CN 1053372A
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- qualification rate
- eddy flow
- mist eliminator
- mist
- flow plate
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Abstract
Improve the qualification rate of condensation water of evaporator in alumina plant, belong to the evaporation technique of alumina producing.The present invention installs the mist eliminator that eddy flow plate mist eliminator replaces existing form such as centrifugal in the vaporization chamber of evaporimeter, can reduce indirect steam to carry the alkali mist secretly, improves the qualification rate of condensed water.The both suitable need of newly founding the factory of the present invention also are fit to modernize and expand the existing factory.
Description
The invention belongs to the evaporation technique of alumina producing, is that eddy flow plate mist eliminator is installed in the vaporization chamber (having another name called boiling-house, separation chamber) at evaporimeter, carries the alkali mist secretly to reduce indirect steam, improves the qualification rate of condensed water.
At present, the evaporimeter of China's alumina producer adopts the mist eliminator of centrifugal or other patterns more.Because unreasonable structure, the vapor-liquid separation poor effect causes indirect steam carrying more alkali mist secretly.This when containing the more indirect steam of alkali mist and making the thermal source of indirect preheating when utilizing, the condensed water of its output often because of alkalinity is above standard, and can't utilize it to do the feedwater of steam power plant's steam boiler.Condensed water alkalinity eligible generally between 20～40%, has slatterned the soft water of a large amount of preciousnesses less than 50% in vain in the actual production at present.In view of the above-mentioned shortcoming that prior art exists, the present invention proposes to replace with eddy flow plate mist eliminator the new design of existing mist eliminator.
Eddy flow plate mist eliminator (mist eliminator has another name called juice catching device, demister, vapour liquid separator) is a kind of novel mist device of catching that China succeeds in developing voluntarily, the existing application in industries such as China's chemical industry, oil, light industry, be one and become thermal technology, but in the evaporimeter of alumina producer, do not use as yet.
The structure of eddy flow plate mist eliminator is referring to accompanying drawing 1 and accompanying drawing 2.Its critical piece is an eddy flow plate 2, and its shape resembles fixing air vane, and steam flow produces rotation and centrifugal motion by blade, and the mist of carrying secretly in the vapour (gas) is got rid of on peripherad cover tube 3 and the vaporization chamber barrel 8, falls thereby assemble.Eddy flow plate system makes with sheet iron, severs by the opening line shown in the dotted line in the accompanying drawing 2, then blade is dug, and makes it to become with horizontal plane 20～30 ° of elevations angle.3 one-tenths tapers of cover tube are welded on the eddy flow plate 2, and its effect has two: one, and the outer rim opening of sealing eddy flow plate 2 is collected along a cover drop that flows down, and make it not fling vaporization chamber barrel 8 and cause entrainment; The 2nd, between vaporization chamber barrel 8 and cover tube 3, form annular collecting tank, the drop that throws away is flowed down along vaporization chamber barrel 8, return in the vaporization chamber through annular collecting tank and downspout 9.The effect of blind plate 1 also has 2 points: the one, and do the inner of eddy flow plate with vapour collect cover 6 jointly and support; The 2nd, distribute steam flow to each eddy flow plate.Around vaporization chamber barrel 8, be provided with steam baffle 4.Steam baffle 4 all has the auxiliary mist effect of catching with retaining vapour circle 5.
The steam flow that rises in the vaporization chamber is dispensed to each eddy flow plate through blind plate 1, and after eddy flow plate 2 was caught mist, the steam flow of its discharge was discharged outside the vaporization chamber through steam baffle 4, retaining vapour circle 5, vapour collect cover 6 and indirect steam outlet 7 again.
The mist efficient of catching that guarantees eddy flow plate mist eliminator reaches more than 90%, and the calculating perforate steam flow speed of eddy flow plate is remained on about 10m/s, allows fluctuation soil 30～40% during production, is equivalent in the scope of 7～14m/s, still can keep the very high mist efficient of catching.Be about 3m/s with the calculating void tower steam flow speed of the corresponding vaporization chamber of perforate steam flow speed 10m/s of eddy flow plate, allow fluctuation during production between 2～4m/s, still belong to and efficiently catch the fog-zone.Less than 2m/s, then should adjust eddy flow plate outer diameter D as the calculating void tower steam flow speed of vaporization chamber
xWith blind plate diameter D
mKey elements such as size, the calculating perforate steam flow speed of eddy flow plate is still remained on about 10m/s, less than 0.5m/s, then can adopt simpler deflection plate mist eliminator as the calculating void tower steam flow speed of vaporization chamber, needn't adopt eddy flow plate mist eliminator.
Compare with existing mist eliminator, the present invention has following advantage:
1. indirect steam qualification rate of condensation water height is profitable.
Existing indirect steam qualification rate of condensation water of catching the mist technology has only 20～40%.The present invention can reach more than 90% owing to catching mist efficient, and the qualification rate of indirect steam condensed water can reach 100%.As produce 2500000 tons of indirect steam condensed waters per year with certain alumina producer is that example is calculated, adopt the present invention can voluminous qualified condensed water 160 than existing technology every year～1,800,000 tons, year is obtained about 2,000,000 yuan of benefit (factory's present price: 1.2 yuan of qualified condensed waters per ton)
2, flow process is simple, and is easy and simple to handle.
Existing technology is provided with well-separated indirect steam condensation water recovery system and the relevant detection facility of certified products and defective work two covers, must measure the alkalinity of condensed water earlier during production, looks whether qualified it is, sends into different condensation water recovery systems respectively.Because flow process is complicated, instrument is more, and management is trouble, causes error easily, and operate miss also is one of low reason of existing technology qualification rate.The present invention prevents trouble before it happens, and only need establish a cover indirect steam condensation water recovery system, and flow process is simpler.Except that a normal selective examination product alkalinity, regular detection system need not be set, the flow velocity fluctuation wider range that in addition allows is so operation is easier.
The present invention both can be used for newly founding the factory, and also can be fit to the technological transformation of old factory.Adopt the present invention to transform a liquor evaporating plant of producing 2500000 tons of indirect steam condensed waters per year, need 40 tons of steel approximately, once invest 250,000 yuan.Because the improvement project amount is very little, can utilize the repair time plug hole of evaporimeter to construct, as long as ready work can not influence production.
Description of drawings:
Accompanying drawing 1 is the front schematic view of eddy flow plate mist eliminator, and accompanying drawing 2 is A-A generalized sections of accompanying drawing 1.
1-blind plate in the accompanying drawing; 2-eddy flow plate; 3-covers tube; The 4-steam baffle; 5-retaining vapour circle; The 6-vapour collect cover; 7-indirect steam outlet; 8-vaporization chamber barrel; The 9-downspout.
Claims (1)
1, a kind of device that improves the qualification rate of condensation water of evaporator in alumina plant, mainly be in the vaporization chamber of evaporimeter, mist eliminator to be installed, the invention is characterized in that the mist eliminator of installing in vaporization chamber is an eddy flow plate mist eliminator, the perforate steam flow speed of eddy flow plate is 7～14m/s (meter per second).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 90107536 CN1053372A (en) | 1990-09-04 | 1990-09-04 | Improve the device of the qualification rate of condensation water of evaporator in alumina plant |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 90107536 CN1053372A (en) | 1990-09-04 | 1990-09-04 | Improve the device of the qualification rate of condensation water of evaporator in alumina plant |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1053372A true CN1053372A (en) | 1991-07-31 |
Family
ID=4880597
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 90107536 Pending CN1053372A (en) | 1990-09-04 | 1990-09-04 | Improve the device of the qualification rate of condensation water of evaporator in alumina plant |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1053372A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102423579A (en) * | 2011-08-31 | 2012-04-25 | 张宏生 | Vertical mist eliminator |
| CN103285624A (en) * | 2013-05-09 | 2013-09-11 | 天津商业大学 | Gas phase-liquid phase separating device |
| CN104436880A (en) * | 2014-11-07 | 2015-03-25 | 安徽金森源环保工程有限公司 | Low-resistance driving type rotary steam-water separation device |
-
1990
- 1990-09-04 CN CN 90107536 patent/CN1053372A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102423579A (en) * | 2011-08-31 | 2012-04-25 | 张宏生 | Vertical mist eliminator |
| CN102423579B (en) * | 2011-08-31 | 2014-01-29 | 张宏生 | Vertical mist eliminator |
| CN103285624A (en) * | 2013-05-09 | 2013-09-11 | 天津商业大学 | Gas phase-liquid phase separating device |
| CN103285624B (en) * | 2013-05-09 | 2015-11-04 | 天津商业大学 | Gas-liquid two-phase separator |
| CN104436880A (en) * | 2014-11-07 | 2015-03-25 | 安徽金森源环保工程有限公司 | Low-resistance driving type rotary steam-water separation device |
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