CN202671341U - Continuous annealing furnace quench tank water-treatment plant with self-cleaning function - Google Patents
Continuous annealing furnace quench tank water-treatment plant with self-cleaning function Download PDFInfo
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- CN202671341U CN202671341U CN 201220231632 CN201220231632U CN202671341U CN 202671341 U CN202671341 U CN 202671341U CN 201220231632 CN201220231632 CN 201220231632 CN 201220231632 U CN201220231632 U CN 201220231632U CN 202671341 U CN202671341 U CN 202671341U
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- water
- quench tank
- self
- watch
- manganese sand
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- Treatment Of Water By Oxidation Or Reduction (AREA)
Abstract
The utility model relates to the technical field of water treatment, in particular to a continuous annealing furnace quench tank water-treatment plant with the self-cleaning function. The water treatment plant includes a purification pipeline, a manganese sand magnetic separator and an electronic pneumatic valve, and is characterized in that a PH detection device is arranged on the purification pipeline, a gas-water mixer is arranged at the stage before the manganese sand magnetic separator, and a compressed air inlet is arranged at the bottom of the manganese sand magnetic separator. Compared with the prior art, the continuous annealing furnace quench tank water-treatment plant with the self-cleaning function has the benefits as follows: the structure is reasonably designed, the operation is stable and reliable, the online quick self cleaning function of the continuous annealing furnace quench tank for demineralized water quality is realized, Fe(OH)3 floccule in demineralized water in the quench tank is successfully eliminated due to combination of three technical measures, the water quality is improved, the surface of a cold-rolled steel strip is prevented from being rusted, at the same time, the reuse of demineralized cooling water in the quench tank is realized, the consumption of large amount of demineralized water is saved, the production cost is lowered, and the cleaning and the reuse of the water sources are realized.
Description
Technical field
The utility model relates to water-treatment technology field, and particularly stove watch-quench tank water treatment device moves back in a kind of company with self-cleaning function.
Background technology
Even moving back stove district watch-quench tank is to connect to move back last link that cools with steel in the stove.The band steel need to pass through two tanks.De-mineralized water flows into second tank from first tank with the mode of overflow and circulates, and water surface elevation transmitter and water surface elevation switch have guaranteed the height of the water surface in the tank.
Watch-quench tank adopts de-mineralized water cooling zone steel, and the cooling of de-mineralized water leans against and passes into clean circulating water in the interchanger and carry out heat exchange and realize.The de-mineralized water temperature is 40 degree after the cooling greater than 90 degree in the groove, and pH value is 6.5.The desalination water circuit adopts water pump, controls its flow according to the flow valve in its downstream, and the recycling water pump injects back in the watch-quench tank after the de-mineralized water cooling, forms circulation.
Through production practice observation statistics, find that connecting the corrosion of moving back watch-quench tank place, stove district be to connect one of major defect of moving back the generation of unit unacceptable product, cause a large amount of stocks or waste product.The steel plate of long-time continuous operation can cause de-mineralized water color jaundice in the watch-quench tank, and the yellow suspension particulate in the water can be attached on band steel, cell body inwall, cooler fin and the sinking roller surface that contact with water, and in time progressively deterioration.Through chemical examination, contain in the water a large amount of ferrous irons and ferric ion with and hydroxide colloid, after accumulation after a while, the colloid formation floss of growing up gradually is attached to watch-quench tank sinking roller surface, prints to belt steel surface again and produces the grid rust.Very large on the strip surface quality impact, produce a large amount of waste products.Simultaneously, this floss adheres on the cooler fin in the water, causes fin to stop up, the impact heat radiation.
Because the de-mineralized water water control indexes in the watch-quench tank is better, specific conductivity is below 10us, impurity is less, all materials are the SU304 stainless steel through investigation in the watch-quench tank, therefore the iron ion source be not in the groove equipment produce, (cleaning requires residual iron value less than 10mg/m but steel plate is via the residual iron of cleaning rear surface, stokehold
3) entering watch-quench tank initial stage and oxygen, high temperature de-mineralized water and steam mixture reaction generation.Reaction equation is as follows:
Fe?+?O
2?+?H
2O?——?Fe
2+?+?(OH)
-
Fe?+?O
2?+?H
2O?——?Fe
3+?+?(OH)
-
Because pH value is 6.5 in the watch-quench tank, under this ph value, ferrous ion can partial hydrolysis, and namely major part all is present in the water with ionic species, and the ferric iron small part is present in the water with ionic species, most of formation Fe (OH)
3Colloid finally becomes yellow the embroidery,
According to the deferrization process of Treatment of Industrial Water, we use industrial manganese sand tramp iron separator to be used for removing the iron of water, and effect is bad.Major cause one is that the deferrization process of conventional Treatment of Industrial Water wants seeking time long, so that Fe (OH)
3Colloid can be adsorbed on manganese sand surface fully, and when iron-holder is larger in the former water apparent in view treatment effect is arranged, and continuous annealing furnace deferrization process cycle request is short, processing requirement is reacted rapidly, and iron-holder is little in the watch-quench tank de-mineralized water water, can not use conventional water treatment process.The 2nd, in the watch-quench tank de-mineralized water owing to pH value and temperature reason, quite a few iron exists with the ferrous iron form, adopt conventional tramp iron separator technique, need to be oxidized to the ferric hydroxide colloid so that ferrous iron can be finished under the katalysis of manganese sand, this also is unaccommodated under the requirement in the quick deironing cycle of watch-quench tank, and this has just caused, and most ferrous iron is unprocessed to be got back to again in the watch-quench tank, with progressively oxidation of oxygen in water, again form ferric hydroxide colloid, produce the grid rust.Therefore the deferrization process of existing maturation and be not suitable for and connect the deironing of moving back the watch-quench tank de-mineralized water and purify.
Present Adopts measure: 1) connect and move back stove when normally producing, the continuous low discharge of watch-quench tank replenishes new de-salted water, discharges yellow red water; 2) each stove district stop, after the cycling start, manual drain watch-quench tank water is to the outlet looping trench, anti-sealing is yellow and cause latticed corrosion; 3) produce thickness and contain 1.5mm at 1.5mm() more than thick material the time, stove district watch-quench tank takes large flow to discharge water and the mode of moisturizing is improved water quality; When 4) overhauling cell body and roller system are cleaned at every turn; 5) sinking roller is changed in the groove, rolls off the production line after the polishing rust cleaning, reuses again.
The aforesaid method energy of not only wasting water, and can only play the respite effect, effect is also unstable, can not fundamentally solve the trough inner water Geological Problems.
Summary of the invention
The purpose of this utility model provides a kind of company with self-cleaning function and moves back stove watch-quench tank water treatment device, overcome deficiency of the prior art, can be significantly, fast reducing connects the content that moves back each pollutant such as ferrous ion in the stove watch-quench tank water, make the de-mineralized water after the deironing realize that in watch-quench tank circularly purifying uses, realize the cleaning recycling of water resources.
For achieving the above object, the utility model is achieved through the following technical solutions:
Stove watch-quench tank water treatment device moves back in a kind of company with self-cleaning function, comprise and purify pipeline, manganese sand tramp iron separator and electropneumatic valve, be provided with the pH value proofing unit at the purification pipeline, manganese sand tramp iron separator prime is provided with gas-water mixer, and the bottom of manganese sand tramp iron separator is provided with the compressed air inlet.
Compared with prior art, the utility model has the advantages that:
Reasonable in design, stable and reliable operation has realized connecting and has moved back the online quick self cleaning function of stove watch-quench tank salt water quality, and three kinds of technique means are synthetic, has successfully eliminated the Fe (OH) in the de-mineralized water in the watch-quench tank
3Floss has improved water quality, and the grid of having avoided Cold-strip Steel Surface to produce fully is yellow to be embroidered, and realizes simultaneously recycling of the interior desalination water coolant of watch-quench tank, saves a large amount of de-mineralized water consumptions, has reduced production cost, realizes the cleaning recycling of water resources.
Description of drawings
Fig. 1 is the utility model water treatment device structural representation;
Fig. 2 is the utility model rust cleaning status architecture schematic diagram;
Structural representation when Fig. 3 is the utility model back flushing state.
Among the figure: 1-purifies pipeline 2-valve 3-valve 4-water discharge valve 5-manganese sand tramp iron separator 6-electropneumatic valve 7-gas-water mixer 8-electropneumatic valve 9-electropneumatic valve 10-electropneumatic valve 11-electropneumatic valve 12-electropneumatic valve 13-watch-quench tank 14-PH value detection device 15-electropneumatic valve 16-electropneumatic valve 17-pump group 18-cooling loop
Embodiment
Below in conjunction with accompanying drawing embodiment of the present utility model is described further:
See Fig. 1, that stove watch-quench tank water treatment device example structure schematic diagram moves back in a kind of company with self-cleaning function of the utility model, comprise by purifying pipeline 1, the purification circuit that manganese sand tramp iron separator 5 and gas-water mixer 7 consist of, cooling loop 18 and the purification circuit of watch-quench tank 13 are respectively each self-operatings, pump group 17 supplies water to purification circuit and cooling loop respectively, purifying pipeline 1 links to each other with valve 3 by valve 2 with the water-in of watch-quench tank 13 bottoms, purify pipeline 1 and be provided with pH value proofing unit 14, be used for detecting in real time the pH value of water, satisfy the requirement of water treatment, the bottom of manganese sand tramp iron separator 5 is provided with between compressed air inlet and the compressed air line successively by electropneumatic valve 6, electropneumatic valve 9 links to each other, and manganese sand tramp iron separator 5 primes are provided with gas-water mixer 7.
Under the general operating mode, open purification circuit half hour every day and can remove iron rust in the water, once tramp iron separator being carried out back flushing per month, can to recover in the tramp iron separator manganese sand active.
During the de-mineralized water normal circulation, electropneumatic valve 8, electropneumatic valve 9 and electropneumatic valve 10 are closed in the watch-quench tank 13, and pump group 17 is drawn de-mineralized water after cooling loop 18 coolings from watch-quench tank 13 and returned the watch-quench tank 13, and purification circuit is not worked.
See Fig. 2, when starting the purification circuit rust cleaning, in the water route, electropneumatic valve 8, valve 2, valve 3 and electropneumatic valve 12 are opened, and electropneumatic valve 10 is closed; In the gas circuit, electropneumatic valve 9, electropneumatic valve 15 are opened, electropneumatic valve 6 is closed, pressurized air and de-mineralized water enter in the gas-water mixer 7, entered in the manganese sand tramp iron separator 5 by the top after fully mixing, realize aeration and absorption rust cleaning, the water outlet of manganese sand tramp iron separator 5 is returned in the watch-quench tank 13 through electropneumatic valve 12, valve 2 and valve 3 by the bottom.
See Fig. 3, when the utility model purification circuit carried out back flushing, in the water route, electropneumatic valve 8, valve 2, valve 3 and electropneumatic valve 12 were closed, and electropneumatic valve 10, electropneumatic valve 11, electropneumatic valve 16 are opened; In the gas circuit, electropneumatic valve 9, electropneumatic valve 6 are opened, and electropneumatic valve 15 is closed, and water discharge valve 4 is opened, and sewage is entered trench.
In water treatment device of the present utility model, be with PH adjusting, aeration and MnO
2These three kinds of means of deironing are in conjunction with utilization, with the Fe in the watch-quench tank
2+Quick Oxidation is Fe
3+, again by the absorption of manganese sand, fast reducing even moves back Fe in the stove watch-quench tank water
2+Content, its concrete operation step is as follows:
1) in watch-quench tank, adds NH
3H
2O regulates pH value, makes the interior pH value of watch-quench tank in 7～7.5 scope, and this pH value is conducive to Fe
2+Be oxidized to Fe
3+, form Fe (OH)
3Colloid is removed by postorder equipment;
2) with water with pass in the manganese sand tramp iron separator after pressurized air mixes, compressed air pressure is that 6-8Bar, flow are no less than 20 liter/mins, by providing sufficient oxygen as oxygenant in water, so that Fe
2+ be converted into Fe
3+, and then all be converted into again the convenient Fe (OH) that removes
3Colloid;
3) Fe in the water (OH)
3Colloid is by MnO in the manganese sand tramp iron separator
2Particle absorption finally reaches the deironing purpose.
In order to guarantee to Fe (OH)
3The adsorption effect of colloid, MnO in the manganese sand tramp iron separator
2Content be not less than 40%.
The changing conditions of suspended substance and iron ion content before and after embodiment uses sees Table 1:
Table 1
| Suspended substance/mg/L | Iron ion content/mg/L | |
| Standard (design is to the requirement of de-salted water) | Trace (trace) | On a small quantity (minim) |
| Before this device is processed (water of extracting out in the watch-quench tank) | 3 | 0.23 |
| After this device is processed (from the water of manganese sand tramp iron separator extraction) | ＜1 | 0.03 |
Claims (1)
1. stove watch-quench tank water treatment device moves back in the company with self-cleaning function, comprise and purify pipeline, manganese sand tramp iron separator and electropneumatic valve, it is characterized in that, be provided with the pH value proofing unit at the purification pipeline, manganese sand tramp iron separator prime is provided with gas-water mixer, and the bottom of manganese sand tramp iron separator is provided with the compressed air inlet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220231632 CN202671341U (en) | 2012-05-21 | 2012-05-21 | Continuous annealing furnace quench tank water-treatment plant with self-cleaning function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220231632 CN202671341U (en) | 2012-05-21 | 2012-05-21 | Continuous annealing furnace quench tank water-treatment plant with self-cleaning function |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202671341U true CN202671341U (en) | 2013-01-16 |
Family
ID=47492257
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220231632 Expired - Fee Related CN202671341U (en) | 2012-05-21 | 2012-05-21 | Continuous annealing furnace quench tank water-treatment plant with self-cleaning function |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202671341U (en) |
-
2012
- 2012-05-21 CN CN 201220231632 patent/CN202671341U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130116 Termination date: 20180521 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |