CN201150831Y - Alkali-containing waste gas purification recovery device of air cushion annealing furnace - Google Patents
Alkali-containing waste gas purification recovery device of air cushion annealing furnace Download PDFInfo
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- CN201150831Y CN201150831Y CNU2007203049335U CN200720304933U CN201150831Y CN 201150831 Y CN201150831 Y CN 201150831Y CN U2007203049335 U CNU2007203049335 U CN U2007203049335U CN 200720304933 U CN200720304933 U CN 200720304933U CN 201150831 Y CN201150831 Y CN 201150831Y
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Abstract
The utility model relates to an air cushion annealing furnace alkali flue gas purifying and retracting device belonging to the alkali flue gas purifying retracting field, which mainly comprises an intake air section, a condenser section, a filtration section, an air-out section and a solution discharge system which is arranged on the lowest face of the whole device, wherein the condenser section mainly comprises a heat transfer calandria, a backwash system, a water collection tank and a water outlet tank; the filtration section mainly comprises a frame, filtering units which are made of collar plate silk webs, a deflector, a bracket, a catch basin and a catheter; the solution discharge system mainly comprises a water accumulation plate, a discharge opeing and an U-shaped pipe. The air cushion annealing furnace alkali flue gas purifying and retracting device solves the technical problems that the alkali flue gas purifying retracting are trouble and difficult and incapable of being effectively purified, thereby enabling the alkali flue gas to be capable of being effectively purified, and the retracting alkali waste liquid is capable of being used repeatedly without secondary pollution, thereby satisfying environmental protection blowoff requirement and low integrated cost, and having good economic benefit and social benefit, and which is used for flue gas purifying of alkali flue gas devices.
Description
Technical field
The utility model relates to and contains soda acid waste gas purification retracting device, a kind of specifically air cushion annealing furnace alkali gas purification recovery device.
Background technology
The air-cushion type continuous annealing furnace is usually used in the annealing of sheet metal strip such as copper strip, because annealing temperature can realize accurately control, copper strip is heated evenly in stove, heated time equates, make annealed copper band crystal grain tiny, performance is even, any surface finish, thereby being widely used in the high-quality annealing of copper material, is most advanced now, optimal annealing furnace.
In the process of copper coin band,, need anneal for obtaining the high-quality copper strip coiled material of surface-brightening, performance homogeneous, band will be through degreasing before entering annealing furnace, washing and drying, the ROLLING OIL raffinate of removing strip surface, this part is operated in the degreasing section and finishes.
The degreasing section is an airtight casing, and copper strips passes from casing, is installed in the spray equipment of cabinet wall, to the alkaline solution of copper strip surface injection after heating, and the Residual oil of flush away copper strip surface, in this process, alkali lye splashes in casing and produces the alkali mist.For preventing that the alkali mist is dispersed in the workshop, other devices in the corrosion workshop destroy workshop condition, and the degreasing section is established mechanical exhaust, negative pressure in the section of guaranteeing.This air draft is an alkali gas, if directly discharging, will certainly contaminated environment, and so air draft need be made purified treatment, up to standardly afterwards discharge.
After the copper strips annealing, again through overpickling and passivation, remove the oxide of strip surface, form the anti-oxidation protection film at copper strip surface, this part is operated in pickling and the passivation section is finished.
Domestic at present to main chemical absorbing and the two kinds of methods of Physical Absorption of adopting of alkali gas purification.
Chemical absorption method is to adopt device such as soda acid mist purifying column to carry out chemical cleaning method.The purification method that these devices adopt is for improving absorption efficiency, the normal acid absorbent solution that uses, the alkali mist is neutralized by acid solution, after absorption liquid is saturated, waste liquid need discharge or after-treatment, and needs the periodic replacement absorption liquid, and maintenance workload is big, the not reproducible use of restored acid alkali wasteliquid very easily causes secondary pollution.
Physical method is at the gas of carrying the granule drop in the air-flow secretly, adopts demister to handle.When mist collides the silk screen surface, be subjected to inertial collision, interception, three kinds of separating mechanism effects of diffusion, be condensed into liquid film and drop gradually, drop gathers in low spot, breaks away from silk screen when drop gravity is greater than surface tension and air-flow rising thrust when diameter is enough big, collects the back discharging.The mist that air-flow is carried secretly is just removed from air-flow basically.It is big that mesh mist eliminator has specific area, in light weight, and free volume is big, makes installation and use advantages such as easy to maintenance, can remove the above drop of 5 μ m, and demist efficient can reach 98～99%, but to lower less than 5 μ m drop demist efficient in the gas.
The utility model content
The purpose of this utility model provides a kind of air cushion annealing furnace alkali gas purification recovery device, solve that prior art exists for the lower problem of drop demist efficient less than 5 μ m.
The technical scheme that its technical problem that solves the utility model adopts is: air cushion annealing furnace alkali gas purification recovery device, and mainly successively by wind inlet section, condensation segment, fillter section, wind outlet section, solution discharge system forms; Described wind inlet section is arranged at the foremost of whole device and is provided with exhaust blower; Condensation segment mainly is made up of heat exchange pipe, backwashing system, water inlet collection case, water outlet collection case, and the heat exchange pipe next door is provided with backwashing system, and heat exchange pipe top is communicated with water outlet collection case, and the bottom is communicated with water inlet collection case, and drain pan is arranged at the foot of condensation segment; Fillter section mainly is made up of framework, filter element, deflector, carriage, collecting tank, catheter, backwashing system; Backwashing system is arranged at above the filter element on the carriage, and deflector is obliquely installed between two filter elements, and catheter is arranged at the position near the lower end of deflector; Solution discharge system is arranged at the bottom of whole device, mainly by the ponding dish, and leakage fluid dram, U type pipe is formed.
The beneficial effects of the utility model are: solve alkali gas and purify the loaded down with trivial details difficult technologies problem that reclaims, alkali gas can well be purified, and the alkali wasteliquid that reclaims is reusable, do not cause secondary pollution, satisfy the environment protection emission requirement, integrated cost is low, has good economic benefit and social benefit.
Description of drawings
Fig. 1 is the condensation segment schematic diagram;
Fig. 2 is the fillter section schematic diagram;
Fig. 3 is that a of Fig. 2 is to view;
Fig. 4 is a fundamental diagram of the present utility model;
1. running water inlets among the figure, 2. water inlet collection case, 3. backwashing system, 4. heat exchange pipe, 5. water outlet collection case, 6. running water outlet, 7. filter element, 8. framework, 9. deflector, 10. carriage, 11. collecting tanks, 12. mozzles, 13. the delivery port envelope, 14. wind outlet sections, 15. fillter sections, 16. condensation segment, 17. wind inlet sections, 18. solution are discharged system.
The specific embodiment
As shown in Figure 1, condensation segment 16 mainly is made up of heat exchange pipe 4, backwashing system 3, water inlet collection case 2, water outlet collection case 5, and heat exchange pipe 4 next doors are provided with backwashing system 3, and heat exchange pipe 4 tops are communicated with water outlet collection case 5, the bottom is communicated with water inlet collection case 2, and drain pan is arranged at the foot of condensation segment 2.
Condensation is to utilize material to have the character of different saturated vapor pressures under different temperatures, makes the polluter condensation that is in steam condition by cooling, impels the growth and the formation of drop, thereby reaches the isolation of purified purpose.The method is used for reclaiming some available pure material as pretreatment unit.When alkali gas enters condensation segment by wind inlet section, thereby alkali gas carries out heat exchange by the cooling water in heat exchange pipe 4 and the heat exchange pipe 4 makes the temperature of alkali gas reduce, and impels waste gas to be condensed into drop by flowing into degreasing bath in the solution discharge system 18.Cooling water is flowed into by water inlet collection case 2 and is passing through heat exchange pipe 4 after 5 outflows of water outlet collection case.The reverse cross connection of cooling water and air.
The key that condensation is reclaimed is a chilling temperature, and the low more then reclaiming clean of chilling temperature degree is high more.But in engineering, adopt the chilled water cost too high, generally do not adopt, often adopt recirculated cooling water.Cooling water recirculation system need be replenished a large amount of running water every day, in order to improve condensation efficiency, reduces cooling water inlet temperature, and the running water cooling is adopted in decision, and the condenser water outlet is used as the part of cooling tower moisturizing, reaches the water circulation like this.
Because the solid that the alkali mist is separated out may be attached to the cooling tube surface, for ease of cleaning, so adopt smooth pipe condenser, the wide pitch arrangement of fin.
For preventing the cold 16 condenser surface scales of condensation segment, this section is provided with backwashing system 3, this system adopts and goes dried up periodic flushing coil surface, so that solid base can not deposit on coil surface, backwashing system spout 3 adopts on the stainless steel tube evenly opens φ 1.5 apertures, pitch-row 20mm, condenser is established drain pan, and draining is connected to deactivation slot.
This section apparatus is outer to be of a size of: 800 * 950 * 1096 (L * W * H)
As shown in Figure 2, the filter element 7, deflector 9, carriage 10, collecting tank 11, mozzle 12 and the backwashing system 3 that mainly constitute by framework 8, by the disk silk screen of fillter section 15 formed; Backwashing system 3 is arranged at above the filter element 7 on the carriage 10, and deflector 9 is arranged at below the filter element 7, and catheter 12 is arranged at the position near the lower end of deflector 9.
When the gas of band mist is flowed through the silk screen of filter element, drop in the gas and silk screen bump, be attached on the silk screen, flow to the contact position of air-flow and silk screen downwards thereupon, because the capillarity in slit herein, drop is no longer past dirty attached to this place, when droplet congregating behind certain volume, the combined force that surpasses capillary and gas rising when its weight, drop falls voluntarily, and fall in ascending air, the mist that air-flow is carried secretly is just removed from air-flow basically, makes the purpose by the air-flow of silk screen is not carried secretly or seldom entrainment has reached gas-liquid separation.Silk screen should be contained on the horizontal level or for increasing filter area and have certain inclination angle, but the inclination angle should not be above 60 °.
The braiding of silk screen is a chain of shape structure, composition garden tubular net, net flattens to become has double-deck wrinkle shape guipure, be rolled into the disk of a required diameter then, as the tap roll coil of strip rises, whole garden dish is placed in the middle of the two-layer framework made from small-sized angle steel, air-flow top exports the position must load onto security strip, otherwise the fluctuation of air-flow or impulse action may destroy the dictyosome structure; Support or security strip area occupied should not surpass 10% of disk area.
Silk screen material: stainless steel wire ordinary steel wire, copper wire, polyethylene, polypropylene, polytetrafluoroethylene (PTFE) terylene etc. are generally arranged, stainless steel wire, galvanized wire specification often are 0.1 * 0.4mm flat filament, φ 0.2～φ 0.25mm circle silk, the green synthetic fibre Polyamide Yarns of nylon is φ 0.25～φ 0.2 garden silk, in recent years, the filter screen that stainless steel cloth and glass silk screen shuffling have occurred, section of steel wire is a rectangle, has improved the gas disturbance, has strengthened the demist ability of filter screen.
Thickness: silk screen is a garden tube banding pattern, and the width after the pressing is a thickness, and usual thickness is as follows:
100 millimeters---book thickness
150 millimeters---the most frequently used thickness
200～300 millimeters---occasions such as mist, mist of oil are recommended thickness
When demist is strict, can adopt bigger thickness or employing secondary silk screen to separate.
Filter screen is made modular, is parallel putting with respect to air-flow.Demisting unit lies in a horizontal plane on the cabinet wall framework, the silk screen water-enriched layer be positioned at that lower floor combines with air-flow face on, moisture evenly have suction-operated to water smoke, prevents the uneven phenomenon that froths that produces of liquid distribution simultaneously, is a kind of desirable placement state.Be convenient maintenance, but this section casing access door is established opener, single no instrument can be installed.The unit framework is the drawer type layout, and filter element is extraction easily, and all regular maintenances all can be finished easily.
This section processing request precision is higher, so that guarantee the sealing of contact-making surface.
Device parameter: handle air quantity 6500m3/h
Comprehensive demist efficient 〉=95%
Appearance and size 500 * 950 * 1096 (L * W * H)
Fillter section had alkaline matter and separates out in the online crystallization of filter wire after 15 work a period of times, caused fillter section 15 gas-flow resistances to increase, and reduced demist efficient.Therefore at fillter section, establish deionized water backwashing system 3.Carry out backwash operation by some cycles.Blanking time, length was controlled by timer, can regulate in 24h.Device band " U " type pipe differential manometer, lasting excessive when device resistance, when backwash is invalid, demisting unit should be extracted out, thoroughly clear up.
For satisfying condensation and filtering the solution that forms and to discharge swimmingly, prevent that the fine droplet that splashes after the droplets fall from coming back in the air.Therefore, below fillter section 15 and condensation segment 16, establish ponding dish and leakage fluid dram, drain by pipeline.Because fillter section is the negative pressure operation, so drawing on the pipeline, establishes U type pipe and prevents the air-flow short circuit.It is corresponding one by one with filter element 7 that fillter section 15 is established deflector 9, and collecting tank 11 and mozzle 12 are established in deflector 9 rear portions, and collected liquid moves in pipeline.No longer contact with air-flow.
Advance wind outlet section 17 and make by stainless steel, convergent or the design of expansion formula, similar hemispherical dome is to reduce gas-flow resistance.
Blower fan is selected: according to system's institute's required airflow and system's drag overall, additional more certain coefficient is selected, and blower fan easily adopts the stainless steel blower fan.
Transmit for the noise and the vibration that prevent the fan operation process, blower fan places in the blimp, and shock absorber is established in the blower fan bottom.
Clarifier directly is placed on the annealing furnace two-layer platform.Do not need to establish in addition device basic.But device is laid and should be stablized, firmly.Being connected should be between clarifier outlet and the centrifugal blower is flexible coupling.After treating the device location, installing " U " type pipe pressure meter, the pressure gauge clamp directly is fixed on the sealed door.
The clarifier bottom is provided with leakage fluid dram.The user need establish with footpath PVC plastic tube and draw liquid to the corresponding liquid bath of air cushion furnace.It is curved that discharging tube is established " U " type, highly is not less than 150mm.
Behind silencer cover that exhaust blower the is joined location, need establish horizontal stopping means.Prevent blower fan displacement when operation.
This device is operation automatically, on the recoil pipeline, establishes normally closed solenoid valve, by time controller control, presses some cycles circulation recoil, and the recoil cycle is not more than 24h.The device initial period is set at 8h, can be according to actual conditions adjustment cycle and recoil time after the operation.
During routine work, whether seam and AD place be dry between attention device, as seepage, in time shutdown maintenance take place.Change the sealing strip on the door.Avoid causing the corrosion of agent set.Longer running time when this device, backwash can not make fillter section pressure be reduced to 70mmH20 when following, should back out handwheel, opens casing, extracts filter element out and carries out cleaning down.
Air-cushion type continuous annealing furnace alkalescence waste gas purification retracting device parameter is as follows:
| The purifier outlet parameter | Temperature (℃) | Relative humidity |
| Air inlet | 40 | 95％ |
| Give vent to anger | 37 | 100％ |
| The cooling water water inlet | 30 | - |
| The cooling water water outlet | 35 | - |
* handle air quantity: 6500m
3/ h
* demisting unit efficient: 95
* demist, condensing unit material are stainless steel
* with the deionized water recoil, backpurge system is controlled by time controller
Claims (1)
1, air cushion annealing furnace alkali gas purification recovery device comprises condensation segment, fillter section, it is characterized in that: also comprise wind inlet section, wind outlet section, solution is discharged system; Wind inlet section is arranged at the foremost of whole device; Condensation segment mainly is made up of heat exchange pipe, backwashing system, water inlet collection case, water outlet collection case, and the heat exchange pipe next door is provided with backwashing system, and heat exchange pipe top connects water outlet collection case, and the bottom connects water inlet collection case, and drain pan is arranged at the foot of condensation segment; Filter element, deflector, carriage, collecting tank, catheter that fillter section mainly constitutes by framework, by the disk silk screen are formed; Backwashing system is arranged at above the filter element on the carriage, and deflector is arranged at below the filter element, and catheter is arranged at the position near the lower end of deflector; Wind outlet section is arranged at the fillter section back; Solution discharge system is arranged at the bottom of whole device, mainly by the ponding dish, and leakage fluid dram, U type pipe is formed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007203049335U CN201150831Y (en) | 2007-12-03 | 2007-12-03 | Alkali-containing waste gas purification recovery device of air cushion annealing furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007203049335U CN201150831Y (en) | 2007-12-03 | 2007-12-03 | Alkali-containing waste gas purification recovery device of air cushion annealing furnace |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201150831Y true CN201150831Y (en) | 2008-11-19 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2007203049335U Expired - Fee Related CN201150831Y (en) | 2007-12-03 | 2007-12-03 | Alkali-containing waste gas purification recovery device of air cushion annealing furnace |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201150831Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103018077A (en) * | 2012-12-28 | 2013-04-03 | 河南师范大学 | Leakage detection sampler |
-
2007
- 2007-12-03 CN CNU2007203049335U patent/CN201150831Y/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103018077A (en) * | 2012-12-28 | 2013-04-03 | 河南师范大学 | Leakage detection sampler |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20081119 Termination date: 20111203 |