CN104645790A - Smoke purification system and method for pickling line - Google Patents
Smoke purification system and method for pickling line Download PDFInfo
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- CN104645790A CN104645790A CN201510068605.9A CN201510068605A CN104645790A CN 104645790 A CN104645790 A CN 104645790A CN 201510068605 A CN201510068605 A CN 201510068605A CN 104645790 A CN104645790 A CN 104645790A
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- heat exchanger
- graphite heat
- water
- pickling
- circulating pump
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Abstract
The invention discloses a smoke purification system and a smoke purification method for a pickling line. An acid mist washing tower, a graphite heat exchanger, a water cooling tower, a chimney and a graphite heat exchanger water circulating pump are used for recycling and using pickling tail gas, wherein the acid mist washing tower is connected with the graphite heat exchanger; the graphite heat exchanger is connected with the water cooling tower and the chimney; the water cooling tower is connected with the graphite heat exchanger water circulating pump; the graphite heat exchanger water circulating pump is connected with the graphite heat exchanger. The smoke purification system can effectively recycle and use HCL in a pickling process, so that an ideal washing effect is achieved, the poisonous gas content of the discharged pickling tail gas is obviously reduced, and the environmental pollution is effectively avoided; furthermore, industrial resources are greatly saved, and the smoke purification system has great social and economic significance.
Description
Technical field
The present invention relates to pickling line fume treatment technical field, more specifically, relate to a kind of pickling line flue gas purification system, and based on the pickling line flue gas purifying method of this System Implementation.
Background technology
Domestic steel industry has several hundreds of bar pickling lines, form has continuous pickling, plug-type pickling etc., in pickling process, because acid cleaning process determines (descaling bath needs micro-negative pressure operation to discharge tail gas), there is a large amount of HCL gas will evaporate from descaling bath along with steam, acid mist enters air after washing, the clean result of this technical process to HCL is undesirable, cause the loss of a large amount of hydrochloric acid, the exhaust emissions index of simultaneously discharging does not meet GB GB28665-2012 requirement yet, to environment, cause no small loss to enterprise.
In view of the restraining factors that environmental protection is socio-economic development all the time, sustainable development must be based upon on the basis of environmental protection, and economic development is at the cost of the environment unsustainable.Patent 2012105121978 discloses a kind of deacidification desulfurizer, and it comprises gas approach runner, except acid tower, exhanst gas outlet runner, but its purification techniques purification efficiency is low, and weak effect, can not meet industrial requirement.Meanwhile, due to the corrosion property of pickling gas, the existing reclaimer life-span is short, is unsuitable for large-scale recycling.The problems referred to above are badly in need of being resolved.
Summary of the invention
The present invention is intended to solve the problems of the technologies described above at least to a certain extent.
Present invention is directed at the defect that prior art exists, in conjunction with the real needs in real work, provide a kind of pickling line flue gas purification system, in addition, the present invention is also based on this system provides a kind of pickling line flue gas purifying method.
Concrete, for solving the problems of the technologies described above, technical scheme of the present invention is as follows:
Pickling line flue gas purification system, comprises acid mist scrubbing tower, graphite heat exchanger, cooling tower, chimney and graphite heat exchanger water-circulating pump; Wherein, acid mist scrubbing tower connects with graphite heat exchanger; Graphite heat exchanger connects with cooling tower and chimney; Cooling tower connects with graphite heat exchanger water-circulating pump; Graphite heat exchanger water-circulating pump connects with graphite heat exchanger.
Acid mist scrubbing tower receives the pickling tail gas from pickling line, acid mist scrubbing tower is made up of high-performance polypropylene, acid mist scrubbing tower is built with the filler of polypropylene material, acid mist scrubbing tower inner upper is provided with the nozzle that a polypropylene is made, spray liquid can be evenly distributed on filler by nozzle, spray liquid on filler forms reverse flow with the pickling tail gas containing water and HCL, and after packing material absorbing HCL, HCL and spray liquid are mixed together the acid generating concentration about 8 ~ 10%.
Graphite heat exchanger is the tubular heat exchanger of graphite-pipe composition, can HCL in condensation pickling tail gas and steam.
Cooling tower is vertical circular structure, can by cooling water temperature.
Graphite heat exchanger water-circulating pump is centrifugal pump of horizontal axis, the cooling water of graphite heat exchanger is circulated, shaft coupling and coupling shield is furnished with in graphite heat exchanger water-circulating pump, simultaneously, the impeller of graphite heat exchanger water-circulating pump is made up of superhigh molecular weight polyethylene material, and shaft seal is sealed by Single Mechanical carborundum.
Two groups of graphite heat exchanger water-circulating pumps are set, one work time, other one for subsequent use, meanwhile, two groups of graphite heat exchanger water-circulating pumps all connect with cooling tower and graphite heat exchanger.
The spray liquid that nozzle distributes is water.
The volume ratio of spray liquid and pickling tail gas is (0.3-2): 1.
Water spray is 1.5-2.5m to the speed at graphite heat exchanger top by described graphite heat exchanger water-circulating pump
3/ h, is preferably 2 m
3/ h.
Described pickling tail gas when entering cleaning system is 80 DEG C.
Described graphite heat exchanger is lowered the temperature, to less than 40 DEG C to entering the pickling tail gas before chimney.
Pickling line flue gas purifying method, comprises the steps:
Step1: arrange the acid mist scrubbing tower be made up of high-performance polypropylene, install the filler of polypropylene material matter in acid mist scrubbing tower, arranges in acid mist scrubbing tower inner upper the nozzle that polypropylene makes; The tubular heat exchanger of graphite-pipe composition is set, forms graphite heat exchanger; The cooling tower of vertical circular structure is set; The graphite heat exchanger water-circulating pump of horizontal centrifugal structure is set, shaft coupling and coupling shield are set in graphite heat exchanger water-circulating pump.
Step2: make acid mist scrubbing tower connect with graphite heat exchanger; Graphite heat exchanger is made to connect with cooling tower and chimney; Cooling tower is made to connect with graphite heat exchanger water-circulating pump; Graphite heat exchanger water-circulating pump is made to connect with graphite heat exchanger; Wherein, two groups of graphite heat exchanger water-circulating pumps are set, one work time, other one for subsequent use, make two groups of graphite heat exchanger water-circulating pumps all connect with cooling tower and graphite heat exchanger.
Step3: acid mist scrubbing tower receives the pickling tail gas from pickling line, the temperature of pickling tail gas about 80 DEG C; Wherein, by nozzle, spray liquid (as water) is evenly distributed on the filler in acid mist scrubbing tower, make the spray liquid on filler form reverse flow with the pickling tail gas containing water and HCL, after packing material absorbing HCL, HCL and spray liquid are mixed together the acid generating concentration about 8 ~ 10%; Then, remaining pickling tail gas is sent into graphite heat exchanger.
Step4: graphite heat exchanger water-circulating pump from extract water in cooling tower and spray to graphite heat exchanger top, lower the temperature, the water of cooling is walked shell side and is flowed into cooling tower along graphite heat exchanger outside, is wherein 2m by Water spray to the speed at graphite heat exchanger top
3/ h; In addition, graphite heat exchanger is synchronously lowered the temperature to pickling tail gas, forms liquid and enter cooling tower after the steam in pickling tail gas is condensed, and after remaining pickling tail gas is cooled to 40 DEG C, walks tube side feeding chimney and discharges.
Step5: the cooling water collected in it is carried out cooling process by cooling tower, so that graphite heat exchanger water-circulating pump uses.
The present invention has carried out effective recycling to the HCL in pickling process, obtain desirable clean result, significantly reduce the toxic gas content of discharged pickling tail gas, effectively prevent environmental pollution, and save a large amount of industrial resources, possess good social effect and economic implications.
Acid mist scrubbing tower is arranged on equipment upstream, and first the acidic materials in pickling gas are absorbed and used, and the possibility be corroded by equipment drops to minimum.Use Water Sproading acidic materials, to recycle.Spray liquid and pickling tail gas form reverse flow, make spray liquid and acid reach extraordinary syncretizing effect.Graphite heat exchanger coordinates graphite heat exchanger water-circulating pump to use, and whole equipment high efficiency is run, and disposal ability is strong.The high-performance polypropylene material of acid mist scrubbing tower is heat-resisting, corrosion-resistant, and goods used vapour is sterilized, and is suitable for very much the recovery carrying out HCL.Be furnished with shaft coupling and coupling shield in graphite heat exchanger water-circulating pump, ensure its Effec-tive Function, be made up of superhigh molecular weight polyethylene material, can not get rusty rotten, there is the high voltage bearing character of heat-and corrosion-resistant.The sealing of Single Mechanical carborundum sealing is tight, effective.
Accompanying drawing explanation
Fig. 1 is the structural representation of present system.
Detailed description of the invention
Accompanying drawing, only for exemplary illustration, can not be interpreted as limitation of the present invention.
To those skilled in the art, in accompanying drawing, some known features and explanation thereof may be omitted is understandable.
Below in conjunction with the Figure of description in the present invention, be clearly and completely described the technical scheme in invention, obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.
Be illustrated in figure 1 the pickling line flue gas purification system of present pre-ferred embodiments, comprise acid mist scrubbing tower, graphite heat exchanger, cooling tower, chimney and graphite heat exchanger water-circulating pump; Wherein, acid mist scrubbing tower receives the pickling tail gas from pickling line, and acid mist scrubbing tower connects with graphite heat exchanger; Graphite heat exchanger connects with cooling tower and chimney; Cooling tower connects with graphite heat exchanger water-circulating pump; Graphite heat exchanger water-circulating pump connects with graphite heat exchanger.
Acid mist scrubbing tower is made up of PPH material (high-performance polypropylene), acid mist scrubbing tower is built with the filler of polypropylene material, acid mist scrubbing tower inner upper is provided with the nozzle that a polypropylene is made, spray liquid can be evenly distributed on filler by nozzle, spray liquid on filler forms reverse flow with the pickling tail gas containing water and HCL, after packing material absorbing HCL, HCL and spray liquid are mixed together the acid generating concentration about 8 ~ 10%.
Graphite heat exchanger is the tubular heat exchanger of graphite-pipe composition, can HCL and steam in condensation pickling tail gas.
Cooling tower is vertical circular structure, can cooling water temperature.
Graphite heat exchanger water-circulating pump is centrifugal pump of horizontal axis, can be circulated the cooling water of graphite heat exchanger, shaft coupling and coupling shield is furnished with in graphite heat exchanger water-circulating pump, simultaneously, the impeller of graphite heat exchanger water-circulating pump is by acid resisting material as superhigh molecular weight polyethylene material is formed, and shaft seal is sealed by Single Mechanical carborundum.
Two groups of graphite heat exchanger water-circulating pumps are set, one work time, other one for subsequent use, meanwhile, two groups of graphite heat exchanger water-circulating pumps all connect with cooling tower and graphite heat exchanger.
Wherein, the spray liquid that nozzle distributes is water.
The volume ratio of spray liquid and pickling tail gas is (0.3-2): 1.
Water spray is 1.5-2.5m to the speed at graphite heat exchanger top by graphite heat exchanger water-circulating pump
3/ h.
Pickling tail gas when entering cleaning system is 80 DEG C.
Graphite heat exchanger is lowered the temperature, to less than 40 DEG C to entering the pickling tail gas before chimney.
Pickling line flue gas purifying method, comprises the steps:
Step1: arrange the acid mist scrubbing tower be made up of PPH material (high-performance polypropylene), install the filler of polypropylene material matter in acid mist scrubbing tower, arranges in acid mist scrubbing tower inner upper the nozzle that polypropylene makes; The tubular heat exchanger of graphite-pipe composition is set, forms graphite heat exchanger; The cooling tower of vertical circular structure is set; The graphite heat exchanger water-circulating pump of horizontal centrifugal structure is set, shaft coupling and coupling shield are set in graphite heat exchanger water-circulating pump.
Step2: make acid mist scrubbing tower connect with graphite heat exchanger; Graphite heat exchanger is made to connect with cooling tower and chimney; Cooling tower is made to connect with graphite heat exchanger water-circulating pump; Graphite heat exchanger water-circulating pump is made to connect with graphite heat exchanger; Wherein, two groups of graphite heat exchanger water-circulating pumps are set, one work time, other one for subsequent use, make two groups of graphite heat exchanger water-circulating pumps all connect with cooling tower and graphite heat exchanger.
Step3: acid mist scrubbing tower receives the pickling tail gas from pickling line, the temperature of pickling tail gas about 80 DEG C; Wherein, by nozzle water is evenly distributed on the filler in acid mist scrubbing tower, make the spray liquid on filler form reverse flow with the pickling tail gas containing water and HCL, after the most HCL of packing material absorbing, HCL and spray liquid are mixed together the acid generating concentration about 8 ~ 10%; Then, remaining pickling tail gas is sent into graphite heat exchanger.
Step4: graphite heat exchanger water-circulating pump from extract water in cooling tower and spray to graphite heat exchanger top, lower the temperature, the water of cooling is walked shell side and is flowed into cooling tower along graphite heat exchanger outside, is wherein 2m by Water spray to the speed at graphite heat exchanger top
3/ h; In addition, graphite heat exchanger is synchronously lowered the temperature to pickling tail gas, forms liquid and enter cooling tower after the steam in pickling tail gas is condensed, and remaining pickling tail gas is (in view of current industrial level, also must remain a small amount of HCL) be cooled to 40 DEG C after, walk tube side send into chimney discharge.
Step5: the cooling water collected in it is carried out cooling process by cooling tower, so that graphite heat exchanger water-circulating pump uses.
Wherein, after the acid of collecting in acid mist scrubbing tower arrives some, acid is carried out recycling and continues to use.
Clean-up effect in the middle of reality of the present invention: guarantee value HCL≤10mg/Nm
3, desired value HCL≤5mg/Nm
3; Contrast GB GB28665-2012:HCL≤30mg/Nm
3.The every m of pickling unit in steel industry
3containing 1500 ~ 2000mg/m in the tail gas of discharging
3, only can wash away small part with washings washing and not reach discharge standard requirement, cause environmental pollution, the present invention can recycle these resources, pollution abatement in a large number, extremely has social effect.In addition, pickling one ton of steel consumption is about 2kg hydrochloric acid, and the overwhelming majority is discharged by pickling acid fog blower fan, and produce 1200000 tons of acid-cleaning plate pickling units per year for one and give off 734.4 tons of hydrochloric acid every year, therefore the present invention reclaims this part hydrochloric acid, has very large economic implications.
In sum, be embodiment of the present invention content, and obviously embodiments of the present invention are not limited in this, it can according to different application environment, utilizes of the present inventionly functionally to realize corresponding demand.
Claims (8)
1. pickling line flue gas purification system, is characterized in that, comprises acid mist scrubbing tower, graphite heat exchanger, cooling tower, chimney and graphite heat exchanger water-circulating pump; Wherein, acid mist scrubbing tower connects with graphite heat exchanger; Graphite heat exchanger connects with cooling tower and chimney; Cooling tower connects with graphite heat exchanger water-circulating pump; Graphite heat exchanger water-circulating pump connects with graphite heat exchanger;
Acid mist scrubbing tower receives the pickling tail gas from pickling line, and acid mist scrubbing tower is made up of high-performance polypropylene, and acid mist scrubbing tower is built with the filler of polypropylene material, and acid mist scrubbing tower inner upper is provided with the nozzle that a polypropylene is made;
Graphite heat exchanger condensation pickling tail gas is the tubular heat exchanger of graphite-pipe composition;
Cooling tower is vertical circular structure;
Graphite heat exchanger water-circulating pump is centrifugal pump of horizontal axis, circulates to the cooling water of graphite heat exchanger; Shaft coupling and coupling shield is furnished with in graphite heat exchanger water-circulating pump;
The impeller of graphite heat exchanger water-circulating pump is made up of superhigh molecular weight polyethylene material, and shaft seal is sealed by Single Mechanical carborundum.
2. pickling line flue gas purification system according to claim 1, is characterized in that, arranges the graphite heat exchanger water-circulating pump described in two groups, one work time, other one for subsequent use; Two groups of graphite heat exchanger water-circulating pumps all connect with cooling tower and graphite heat exchanger.
3. pickling line flue gas purification system according to claim 1, is characterized in that, the spray liquid that described nozzle distributes is water.
4. pickling line flue gas purification system according to claim 1, is characterized in that, the volume ratio of described spray liquid and pickling tail gas is (0.3-2): 1.
5. pickling line flue gas purification system according to claim 1, is characterized in that, Water spray is 1.5-2.5m to the speed at graphite heat exchanger top by described graphite heat exchanger water-circulating pump
3/ h.
6. pickling line flue gas purification system according to claim 1, is characterized in that, described pickling tail gas when entering pickling line flue gas purification system is 80 DEG C.
7. pickling line flue gas purification system according to claim 1, is characterized in that, described graphite heat exchanger is lowered the temperature, to less than 40 DEG C to entering the pickling tail gas before chimney.
8., based on the pickling line flue gas purifying method that pickling line flue gas purification system according to claim 1 is implemented, it is characterized in that, comprise the steps:
Step1: arrange the acid mist scrubbing tower be made up of high-performance polypropylene, install the filler of polypropylene material matter in acid mist scrubbing tower, arranges in acid mist scrubbing tower inner upper the nozzle that polypropylene makes; The tubular heat exchanger of graphite-pipe composition is set, forms graphite heat exchanger; The cooling tower of vertical circular structure is set; The graphite heat exchanger water-circulating pump of horizontal centrifugal structure is set, shaft coupling and coupling shield are set in graphite heat exchanger water-circulating pump;
Step2: make acid mist scrubbing tower connect with graphite heat exchanger; Graphite heat exchanger is made to connect with cooling tower and chimney; Cooling tower is made to connect with graphite heat exchanger water-circulating pump; Graphite heat exchanger water-circulating pump is made to connect with graphite heat exchanger; Wherein, two groups of graphite heat exchanger water-circulating pumps are set, one work time, other one for subsequent use, make two groups of graphite heat exchanger water-circulating pumps all connect with cooling tower and graphite heat exchanger;
Step3: acid mist scrubbing tower receives the pickling tail gas from pickling line, and the temperature of pickling tail gas is 80 DEG C; Wherein, to be evenly distributed to by water on the filler in acid mist scrubbing tower by nozzle, make the spray liquid on filler form reverse flow with the pickling tail gas containing water and HCL, after packing material absorbing HCL, HCL mixes with spray liquid; Then remaining pickling tail gas is sent into graphite heat exchanger;
Step4: graphite heat exchanger water-circulating pump is from extracting water in cooling tower and spraying to graphite heat exchanger top, lower the temperature, the water of cooling is walked shell side and is flowed into cooling tower along graphite heat exchanger outside, is wherein 1.5-2.5m by Water spray to the speed at graphite heat exchanger top
3/ h; In addition, graphite heat exchanger is synchronously lowered the temperature to pickling tail gas, forms liquid and enter cooling tower after the steam in pickling tail gas is condensed, and after remaining pickling tail gas is cooled to 40 DEG C, walks tube side feeding chimney and discharges;
Step5: the cooling water collected in it is carried out cooling process by cooling tower, so that graphite heat exchanger water-circulating pump uses.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510068605.9A CN104645790A (en) | 2015-02-10 | 2015-02-10 | Smoke purification system and method for pickling line |
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| CN201510068605.9A CN104645790A (en) | 2015-02-10 | 2015-02-10 | Smoke purification system and method for pickling line |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105036079A (en) * | 2015-06-12 | 2015-11-11 | 德州实华化工有限公司 | System and method for improving heat exchange effects of graphite blocks in HCl synthetic furnace with byproduct steam |
| CN105642109A (en) * | 2016-01-08 | 2016-06-08 | 昆明理工大学 | Industrial tail gas treatment device for microwave combined graphite heat exchanger |
| CN105671573A (en) * | 2016-03-29 | 2016-06-15 | 中冶南方工程技术有限公司 | Tail gas eliminating system and method for acid pickling acid regenerating unit |
| CN106178897A (en) * | 2016-08-26 | 2016-12-07 | 浙江圣达生物药业股份有限公司 | Incinerator exhaust treatment system |
| CN106345234A (en) * | 2016-10-21 | 2017-01-25 | 成都阿斯特克国龙环保工程有限公司 | Tail gas purification device for pickling line |
| CN107596844A (en) * | 2017-11-03 | 2018-01-19 | 天津市三木森电炉股份有限公司 | A kind of flue gas cleaning system |
| CN107774005A (en) * | 2017-11-28 | 2018-03-09 | 成都阿斯特克国龙环保工程有限公司 | A kind of exhaust treatment system and method for acid regeneration unit |
| CN115350565A (en) * | 2022-07-12 | 2022-11-18 | 绍兴明业化纤有限公司 | Efficient sulfuric acid waste heat recovery equipment and recovery process thereof |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201470140U (en) * | 2009-09-03 | 2010-05-19 | 尤福军 | Acid mist recycling purifier of cold-rolling pickling line with acid mist condenser |
-
2015
- 2015-02-10 CN CN201510068605.9A patent/CN104645790A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201470140U (en) * | 2009-09-03 | 2010-05-19 | 尤福军 | Acid mist recycling purifier of cold-rolling pickling line with acid mist condenser |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105036079A (en) * | 2015-06-12 | 2015-11-11 | 德州实华化工有限公司 | System and method for improving heat exchange effects of graphite blocks in HCl synthetic furnace with byproduct steam |
| CN105036079B (en) * | 2015-06-12 | 2017-03-08 | 德州实华化工有限公司 | A kind of system and method improving byproduct steam HCl synthetic furnace graphite block heat transfer effect |
| CN105642109A (en) * | 2016-01-08 | 2016-06-08 | 昆明理工大学 | Industrial tail gas treatment device for microwave combined graphite heat exchanger |
| CN105671573A (en) * | 2016-03-29 | 2016-06-15 | 中冶南方工程技术有限公司 | Tail gas eliminating system and method for acid pickling acid regenerating unit |
| CN105671573B (en) * | 2016-03-29 | 2018-05-08 | 中冶南方工程技术有限公司 | A kind of pickling acid regeneration unit tail gas eliminates system and tail gas removing method |
| CN106178897A (en) * | 2016-08-26 | 2016-12-07 | 浙江圣达生物药业股份有限公司 | Incinerator exhaust treatment system |
| CN106345234A (en) * | 2016-10-21 | 2017-01-25 | 成都阿斯特克国龙环保工程有限公司 | Tail gas purification device for pickling line |
| CN107596844A (en) * | 2017-11-03 | 2018-01-19 | 天津市三木森电炉股份有限公司 | A kind of flue gas cleaning system |
| CN107774005A (en) * | 2017-11-28 | 2018-03-09 | 成都阿斯特克国龙环保工程有限公司 | A kind of exhaust treatment system and method for acid regeneration unit |
| CN115350565A (en) * | 2022-07-12 | 2022-11-18 | 绍兴明业化纤有限公司 | Efficient sulfuric acid waste heat recovery equipment and recovery process thereof |
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Address after: Focus on the development of A Industrial Zone West Gangcheng District in Jintang County of Chengdu city of Sichuan Province in 610400 Applicant after: ChengDu ASTEC GULN Environmental Protection Engineering Co., Ltd. Applicant after: Shandong Dingxin plate Technology Co. Ltd. Guangzhou Address before: Focus on the development of A Industrial Zone West Gangcheng District in Jintang County of Chengdu city of Sichuan Province in 610400 Applicant before: ChengDu ASTEC GULN Environmental Protection Engineering Co., Ltd. Applicant before: Shandong Guan Zhou Ding Xin sheet material Science and Technology Ltd. |
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Application publication date: 20150527 |
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