CN104372357B - Pickling unit acid tank rupture after production method - Google Patents
Pickling unit acid tank rupture after production method Download PDFInfo
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- CN104372357B CN104372357B CN201410699359.2A CN201410699359A CN104372357B CN 104372357 B CN104372357 B CN 104372357B CN 201410699359 A CN201410699359 A CN 201410699359A CN 104372357 B CN104372357 B CN 104372357B
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Abstract
Pickling unit acid tank rupture after production method, relate to pickling machine technical group field, for solving because of the acid tank problem that ruptures the pickling compressor emergency shutdown caused.Mainly comprise the steps that 1. the adjustment of (1) equipment closes the acid circulating pump ruptured between acid tank and corresponding acid tank, close this and rupture the connection pipeline between acid tank and other acid pot bottom, and the bottom of other acid tank in addition to rupturing acid tank is sequentially communicated together；2. the electrical equipment in the electric loop corresponding with rupturing acid tank is locked；3. emptying ruptures the acid tank that acid tank is corresponding；(2) difference according to strip steel steel grade carries out the adjustment of acid cleaning process parameter.This production method, will rupture acid tank by equipment adjustment and " extract "；By technique adjustment, change technological parameter during pickling, so that ensureing pickling quality in the case of effective pickling time reduces.By equipment and the adjustment of technological parameter so that pickling lines is not shut down, reduce the loss caused because of equipment downtime.
Description
Technical field
The present invention relates to pickling machine technical group field, a kind of rupture when the sour tank of pickling unit
After do not shut down continuation production method.
Background technology
As the first working procedure of cold rolling industry, pickling unit main technique function is for removing incoming hot rolled slab surface
Iron scale, according to the difference of machine set type (plug-type or continuous way), generally use 3～5 grades of acid
Wash.
Acid tank is the container of storage acid solution, and the material of acid tank generally uses fiberglass, at high temperature and highly acid
Working condition under, its projected life is 8～10 years.Therefore, pickling unit produced continuously more than 6 years
After, the probability that acid tank ruptures is greatly increased.Once there is break accident, it will directly result in production line and stop
Produce.Owing to acid tank is not spare part routinely, after therefore occurring acid tank to rupture, pickling unit is needed to stop production,
Contact sour tank farms man new production one acid tank, rear installation in being then delivered to factory, to resume production, break from sour tank
Splitting before again producing to installation eo-acid tank, the whole time is about 20～30 days, and downtime is longer.
Owing to pickling unit stops production, the milling train of postorder, annealing and the operation such as zinc-plated also can stop production, to cold rolling mill
Organization of production causes extreme influence.
Summary of the invention
It is an object of the invention to provide the production method after a kind of pickling unit acid tank ruptures, be used for solving
The problem rupturing the pickling compressor emergency shutdown caused because of acid tank.
The present invention solves its technical problem and is adopted the technical scheme that: pickling unit acid tank rupture after life
Product method, it is characterised in that mainly comprise the steps that
(1) adjustment of equipment
1. close the acid circulating pump ruptured between acid tank and corresponding acid tank, close this and rupture acid tank and other acid
Connection pipeline between pot bottom, and the bottom not rupturing acid tank is sequentially communicated together；
2. the electrical equipment in the electric loop corresponding with rupturing acid tank is locked；
3. emptying ruptures the acid tank that acid tank is corresponding；
(2) adjustment of technique
Difference according to strip steel steel grade carries out the adjustment of acid cleaning process parameter, and acid cleaning process parameter includes acid solution
Temperature, acid strength and pickling speed, during pickling, strip steel sequentially passes through three acid tanks,
The strip steel that common straightcarbon steel is made, the acid not ruptured in the acid tank that acid tank is corresponding that will initially pass through
Liquid concentration adjusts to 40～80g/L, and acid liquor temperature adjusts to 82～88 DEG C, adjusts pickling speed to little
In equal to 120m/min；The rear acid strength not ruptured in the acid tank that acid tank is corresponding passed is adjusted to greatly
In equal to 120g/L；Acid liquor temperature adjusts to 77～83 DEG C, and pickling speed adjusts to 80～100m/min；
The strip steel made for special steel, by dense for the acid solution not ruptured in the acid tank that acid tank is corresponding initially passed through
Degree adjusts to 40～80g/L, and acid liquor temperature adjusts to 82～88 DEG C, adjusts pickling speed to being less than
In 120m/min；The rear acid strength not ruptured in the acid tank that acid tank is corresponding passed is adjusted to being more than
In 140g/L；Acid liquor temperature adjusts to 77～83 DEG C, and pickling speed adjusts to 60～90m/min；
Entrance spray beam and the outlet of the acid tank corresponding with rupturing acid tank is raised while adjusting acid cleaning process parameter
The nozzle angle of spray beam so that it is changed into transverse horizontal by original downward-sloping 45 degree, and raise broken with this
Split the squeeze roll that acid tank is corresponding.
Further, described electrical equipment includes butterfly valve, hot recycle pump, acid pump and heat exchanger.
Further, emptying ruptures the concrete operations of acid acid tank corresponding to tank is to open that to rupture acid tank corresponding
Acid tank groove lid, checks the acid solution of residual and rinses with water.
The invention has the beneficial effects as follows: the present invention provide pickling unit acid tank rupture after production method,
Acid tank will be ruptured by equipment adjustment " to extract ", realize the pickling to strip steel by not rupturing acid tank；Logical
Cross technique adjustment, change technological parameter during pickling, so that when acid tank quantity minimizing, effective pickling
Between reduce in the case of ensure the quality of pickling.By equipment and the adjustment of technological parameter so that pickling is raw
Produce line not shut down, and can guarantee that the quality of pickling, reduce the loss caused because of equipment downtime.
Accompanying drawing explanation
Detailed description of the invention
After acid tank ruptures, the present invention realizes working on of pickling unit by following steps.
1, equipment adjusts
(1) close the acid circulating pump ruptured between acid tank and corresponding acid tank, close this rupture sour tank and other
Connection pipeline between acid pot bottom, and the bottom not rupturing acid tank is sequentially communicated together.To be provided with
Illustrate as a example by the pickling unit of three sour tanks, No. 1 sour tank that three sour tanks are respectively sequentially arranged, 2
Number sour tank and No. 3 sour tanks, the acid tank corresponding with three sour tanks is respectively No. 1 acid tank, No. 2 acid tanks and 3
Number acid tank.When No. 1 sour tank ruptures, then close the acid circulating pump between No. 1 sour tank and No. 1 acid tank,
Making the acid solution in No. 1 sour tank can not enter in No. 1 acid tank, the acid solution in No. 1 acid tank can not be back to
In No. 1 sour tank；Close the manually-operated gate connected on pipeline between No. 1 sour tank and No. 2 sour pot bottoms, with
Cut off the connection between No. 1 sour tank and No. 2 sour tanks so that the acid solution in No. 2 sour tanks can not flow to No. 1
In acid tank；Now owing to the bottom of No. 2 sour tanks and No. 3 sour tanks is yet by connecting pipeline communication, the most not
Need by the bottom of No. 2 sour tanks and No. 3 sour tanks by pipeline communication together.
When No. 2 sour tanks rupture, then close the acid circulating pump between No. 2 sour tanks and No. 2 acid tanks so that 2
Acid solution in number sour tank can not enter in No. 2 acid tanks, and the acid solution in No. 2 acid tanks can not be back to No. 2 acid
In tank；Close the manually-operated gate connected on pipeline between No. 1 sour tank and No. 2 sour pot bottoms, to cut off 1
Connection number between sour tank and No. 2 sour tanks so that the acid solution in No. 1 sour tank can not flow in No. 2 sour tanks；
Close the manually-operated gate connected on pipeline between No. 2 sour tanks and No. 3 sour pot bottoms, to cut off No. 2 acid
Connection between tank and No. 3 sour tanks so that the acid solution in No. 3 sour tanks can not flow in No. 2 sour tanks；Logical
The bottom of No. 1 sour tank and No. 3 sour tanks is connected by piping, and in No. 1 sour tank of connection and No. 3 acid
On the pipeline of pot bottom, manually-operated gate is set.
When No. 3 sour tanks rupture, then close the acid circulating pump between No. 3 sour tanks and No. 3 acid tanks so that 3
Acid solution in number sour tank can not enter in No. 3 acid tanks, and the acid solution in No. 3 acid tanks can not be back to No. 3 acid
In tank；Close the manually-operated gate connected on pipeline between No. 3 sour tanks and No. 2 sour pot bottoms, to cut off 3
Connection number between sour tank and No. 2 sour tanks so that the acid solution in No. 2 sour tanks can not flow in No. 3 sour tanks；
Now owing to the bottom of No. 2 sour tanks and No. 1 sour tank is yet by connecting pipeline communication, therefore need not 2
The bottom of number sour tank and No. 1 sour tank is by pipeline communication together.
(2) electrical equipment in the electric loop corresponding with rupturing acid tank is locked.With rupture acid tank phase
In corresponding electric loop need into line-locked electrical equipment include butterfly valve, hot recycle pump, acid pump and
Heat exchanger, by locking above-mentioned electrical equipment, eliminates alarm signal, i.e. will not rupturing because of acid tank
Cause the warning of above-mentioned electrical equipment and stop producing.
(3) emptying ruptures the acid tank that acid tank is corresponding.
As a example by the pickling unit being provided with three sour tanks, No. 1 sour tank that three sour tanks respectively set gradually,
No. 2 sour tanks and No. 3 sour tanks, the acid tank corresponding with three sour tanks be respectively No. 1 acid tank, No. 2 acid tanks and
No. 3 acid tanks, when No. 1 sour tank ruptures, open the groove lid of No. 1, No. 2 and No. 3 acid tank, in checking groove
Residual acid is also rinsed with water, it is ensured that No. 1 acid tank is emptied completely；Raise entrance spray beam corresponding to No. 1 acid tank and
The nozzle angle of outlet spray beam so that it is changed into transverse horizontal by original downward-sloping 45 degree, raise simultaneously
The squeeze roll corresponding with No. 1 sour tank, in case leukorrhagia stopping steel by during No. 1 acid tank because making with contacting of acid tank
The damage become.
2, the adjustment of acid cleaning process
Due to rupturing of acid tank, strip steel is through rupturing the acid tank that acid tank is corresponding, and strip steel sky crosses acid tank (i.e.
Acid solution does not contacts with the strip) cause the actual pickling time of strip steel to reduce.As a example by being provided with three sour tanks,
When the total length of acid tank is 60m, when under normal production scenarios, pickling speed is 60m/min, pickling time
It it is 60 seconds.After tank ruptures when certain acid, in the acid tank corresponding with this acid tank, there is no an acid solution, strip steel sky mistake,
If pickling speed is still 60m/min, then effectively pickling time is 40 seconds so that the pickling time of strip steel is big
Big minimizing.For ensureing the product quality of pickling, need acid cleaning process is adjusted, to ensure in pickling
In the case of effective time declines, basic maintenance pickling quality is unaffected.Root is wanted in the adjustment of acid cleaning process
Formulate according to the difference of strip steel steel grade, the adjustment adjusting predominantly acid cleaning process index of acid cleaning process, acid
Wash technic index and be mainly acid liquor temperature, acid strength and pickling speed.
As a example by No. 1 sour tank ruptures, acid tank is total up to three, No. 1 sour tank respectively setting gradually,
No. 2 sour tanks and No. 3 sour tanks, the acid tank corresponding with three sour tanks is respectively No. 1 acid tank, No. 2 acid tanks
With No. 3 acid tanks, specifically it is adjusted to: the acid strength of No. 2 acid tanks is adjusted to 40～80g/L, acid solution temperature
Degree is 82～88 DEG C, and pickling speed is less than equal to 120m/min, preferred when strip steel is common straightcarbon steel
Pickling speed be 80～100m/min, when strip steel is special steel, preferred pickling speed is 60～90
m/min.Being adjusted the acid solution in No. 3 acid tanks, adjustment mode is: when strip steel is common straightcarbon steel,
Acid strength is greater than equal to 120g/L；When strip steel is special steel, acid strength is greater than and is equal to
140g/L；Acid liquor temperature is 77～83 DEG C；Pickling speed is less than equal to 120m/min, when strip steel is general
During logical carbon steel, preferred pickling speed is 80～100m/min, the preferred pickling when strip steel is special steel
Speed is 60～90m/min.When the acid strength in No. 2 acid tanks and No. 3 acid tanks is the most up to standard, increase
Sampling frequency, and shut down 15min and carry out changing acid.
As a example by No. 2 sour tanks rupture, acid tank is total up to three, No. 1 sour tank respectively setting gradually,
No. 2 sour tanks and No. 3 sour tanks, the acid tank corresponding with three sour tanks is respectively No. 1 acid tank, No. 2 acid tanks
With No. 3 acid tanks, specifically it is adjusted to: the acid strength of No. 1 acid tank is adjusted to 40～80g/L, acid solution temperature
Degree is 82～88 DEG C, and pickling speed is less than equal to 120m/min, preferred when strip steel is common straightcarbon steel
Pickling speed be 80～100m/min, when strip steel is special steel, preferred pickling speed is 60～90
m/min.Being adjusted the acid solution in No. 3 acid tanks, adjustment mode is: when strip steel is common straightcarbon steel,
Acid strength is greater than equal to 120g/L；When strip steel is special steel, acid strength is greater than and is equal to
140g/L；Acid liquor temperature is 77～83 DEG C；Pickling speed is less than equal to 120m/min, when strip steel is general
During logical carbon steel, preferred pickling speed is 80～100m/min, the preferred pickling when strip steel is special steel
Speed is 60～90m/min.When the acid strength in No. 1 acid tank and No. 3 acid tanks is the most up to standard, increase
Sampling frequency, and shut down 15min and carry out changing acid.
As a example by No. 3 sour tanks rupture, acid tank is total up to three, No. 1 sour tank respectively setting gradually,
No. 2 sour tanks and No. 3 sour tanks, the acid tank corresponding with three sour tanks is respectively No. 1 acid tank, No. 2 acid tanks
With No. 3 acid tanks, specifically it is adjusted to: the acid strength of No. 1 acid tank is adjusted to 40～80g/L, acid solution temperature
Degree is 82～88 DEG C, and pickling speed is less than equal to 120m/min, preferred when strip steel is common straightcarbon steel
Pickling speed be 80～100m/min, when strip steel is special steel, preferred pickling speed is 60～90
m/min.Being adjusted the acid solution in No. 2 acid tanks, adjustment mode is: when strip steel is common straightcarbon steel,
Acid strength is greater than equal to 120g/L；When strip steel is special steel, acid strength is greater than and is equal to
140g/L；Acid liquor temperature is 77～83 DEG C；Pickling speed is less than equal to 120m/min, when strip steel is general
During logical carbon steel, preferred pickling speed is 80～100m/min, the preferred pickling when strip steel is special steel
Speed is 60～90m/min.When the acid strength in No. 1 acid tank and No. 3 acid tanks is the most up to standard, increase
Sampling frequency, and shut down 15min and carry out changing acid.
Claims (3)
1. the production method after pickling unit acid tank ruptures, it is characterised in that mainly comprise the steps that
(1) adjustment of equipment
1. close the acid circulating pump ruptured between acid tank and corresponding acid tank, close this and rupture acid tank and other acid
Connection pipeline between pot bottom, and the bottom not rupturing acid tank is sequentially communicated together；
2. the electrical equipment in the electric loop corresponding with rupturing acid tank is locked；
3. emptying ruptures the acid tank that acid tank is corresponding；
(2) adjustment of technique
Difference according to strip steel steel grade carries out the adjustment of acid cleaning process parameter, and acid cleaning process parameter includes acid solution
Temperature, acid strength and pickling speed, during pickling, strip steel sequentially passes through three acid tanks,
The strip steel that common straightcarbon steel is made, the acid not ruptured in the acid tank that acid tank is corresponding that will initially pass through
Liquid concentration adjusts to 40～80g/L, and acid liquor temperature adjusts to 82～88 DEG C, adjusts pickling speed to little
In equal to 120m/min；The rear acid strength not ruptured in the acid tank that acid tank is corresponding passed is adjusted to greatly
In equal to 120g/L；Acid liquor temperature adjusts to 77～83 DEG C, and pickling speed adjusts to 80～100m/min；
The strip steel made for special steel, by dense for the acid solution not ruptured in the acid tank that acid tank is corresponding initially passed through
Degree adjusts to 40～80g/L, and acid liquor temperature adjusts to 82～88 DEG C, adjusts pickling speed to being less than
In 120m/min；The rear acid strength not ruptured in the acid tank that acid tank is corresponding passed is adjusted to being more than
In 140g/L；Acid liquor temperature adjusts to 77～83 DEG C, and pickling speed adjusts to 60～90m/min；
Raise the entrance spray beam of the acid tank corresponding with rupturing acid tank while adjusting acid cleaning process parameter and go out
The nozzle angle of mouth spray beam so that it is changed into transverse horizontal by original downward-sloping 45 degree, and raise and be somebody's turn to do
Rupture the squeeze roll that acid tank is corresponding.
Pickling unit acid tank the most according to claim 1 rupture after production method, it is characterized in that,
Described electrical equipment includes butterfly valve, hot recycle pump, acid pump and heat exchanger.
Pickling unit acid tank the most according to claim 2 rupture after production method, it is characterized in that,
It is to open to rupture the acid tank groove lid that acid tank is corresponding that emptying ruptures the concrete operations of acid tank corresponding to acid tank, checks
Residual acid solution and rinse with water.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410699359.2A CN104372357B (en) | 2014-11-27 | 2014-11-27 | Pickling unit acid tank rupture after production method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410699359.2A CN104372357B (en) | 2014-11-27 | 2014-11-27 | Pickling unit acid tank rupture after production method |
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| CN104372357A CN104372357A (en) | 2015-02-25 |
| CN104372357B true CN104372357B (en) | 2016-09-21 |
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| CN105648461B (en) * | 2016-03-07 | 2018-06-22 | 首钢京唐钢铁联合有限责任公司 | Acid leakage treatment system and method for acid tank and acid tank in cold rolling and acid rolling unit |
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| JP3704893B2 (en) * | 1997-07-03 | 2005-10-12 | Ｊｆｅスチール株式会社 | Steel plate pickling apparatus and pickling method, and steel sheet hot-dip plating apparatus and hot dipping method |
| CN100593587C (en) * | 2006-06-30 | 2010-03-10 | 宝山钢铁股份有限公司 | Silicon steel sulfuric acid refining system cleaning process |
| CN101665946B (en) * | 2008-09-01 | 2011-07-27 | 鞍钢股份有限公司 | Cold-rolled strip steel pickling turbulence control device and method |
| US9267210B2 (en) * | 2009-07-29 | 2016-02-23 | Siemens Industry, Inc. | Pickle line assembly with inclined expansion seal |
| KR101379059B1 (en) * | 2012-06-15 | 2014-03-28 | 주식회사 포스코 | Pickling apparatus |
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Granted publication date: 20160921 Termination date: 20181127 |