CN205205211U - Tail gas recovery unit of hot dip galvanization line protection gas - Google Patents
Tail gas recovery unit of hot dip galvanization line protection gas Download PDFInfo
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- CN205205211U CN205205211U CN201520788821.6U CN201520788821U CN205205211U CN 205205211 U CN205205211 U CN 205205211U CN 201520788821 U CN201520788821 U CN 201520788821U CN 205205211 U CN205205211 U CN 205205211U
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Abstract
The utility model provides a tail gas recovery unit of hot dip galvanization line protection gas, including gas -solid separator, first cooler, first fan, second fan, degasifier, the drying device who connects in order, the feed inlet and the tail gas export of gas -solid separator are non - sealing connection. Therefore, the utility model discloses a reduce tail gas outlet pressure and with its control under the pressure -fired condition, carry out the gas -solid separation to tail gas in proper order, the cooling dewatering, step up, the deoxidation, drying process, thereby realize the recovery purification to tail gas, in addition cycle recycle in going into galvanized wire with the product pneumatic transmission again, the demand of galvanized wire to liquid ammonia has greatly been reduced, and the required electric quantity of ammonia decomposition, and each component parts of the device is the conventional equipment among the prior art, directly assemble alright use, and is simple in structure, installation, energy saving and environmental protection.
Description
Technical field
The utility model relates to zinc-plated production field, particularly relates to the device for recovering tail gas of a kind of galvanization production line protection gas.
Background technology
Pot galvanize is referred to as again galvanizing or galvanizing, is a kind of effective anti-corrosion of metal mode, most widely used general, steel surface treatment process that the ratio of performance to price is optimum in the Ye Shi world today.The corrosion inhibitor of Hot Galvanizing Technology to iron and steel is lengthened the life, energy-saving material-saving plays inestimable and irreplaceable effect, pot galvanize iron and steel is had in industries such as iron tower of power transmission line, communication steel tower, street illumination, electric railway, traffic, shipbuilding, buildings and applies very widely.According to statistics, the annual zinc output in the whole world 40% for pot galvanize, and pot galvanize is also traditional high energy gamma source consumption industry simultaneously, along with the industrialized continuous propelling of China, the growing tension of power supply and the enhancing gradually of Public environmental attitude, impel energy-saving and emission-reduction to become the inevitable development trend of pot galvanize industry.
At present; domestic existing Continuous Hot Dip Galvanizing Line many uses ammonolysis craft gas (containing the hydrogen of 75% and the ammonia of 25%) is simultaneously as reducing gas and protection gas; although in theory galvanization production line only need≤hydrogen of 5% can realize zinc-plated; but in actual production; if density of hydrogen is too low, zinc-plated effect can be affected; cause and leakage cross, so substantially protect the density of hydrogen in gas to be all more than 30%.For the protection gas after use; due to the hydrogen wherein still containing high density; and the hydrogen extremely incendive gas that is one; therefore; prior art is normally by its direct emptying burning; or burn together with the Sweet natural gas that previous stage calcining zone steel uses; but above-mentioned processing mode not only causes a large amount of wastes of resource; and sweep along the particulate matter such as dust in the gas after using; also may produce coking when burning and cause roasting kiln to block, being discharged in air and also can causing environmental pollution.In addition, existing galvanization production line does not arrange pressure safeguards system, causes that the safety performance of whole equipment is low, poor stability.Therefore, in this case just in the urgent need to being optimized process, to overcome the above-mentioned defect existing for prior art to the protection gas after use on galvanization production line.
Utility model content
The technical problem that the utility model solves is to overcome the defect of the low and contaminate environment of resource utilization existing for galvanization production line of the prior art, and then provides a kind of device for recovering tail gas of galvanization production line protection gas of energy-conserving and environment-protective.
Another technical problem that the utility model solves is the defect of the protection atmospheric pressure instability overcome existing for galvanization production line of the prior art, and then provides a kind of device for recovering tail gas that can ensure the galvanization production line protection gas that whole line stability is good.
For this reason, the utility model realizes the technical scheme of above-mentioned purpose and is:
A device for recovering tail gas for galvanization production line protection gas, comprising:
Gas-solid separator, its opening for feed and galvanization production line protect the offgas outlet of gas to be that non-tight is connected;
The first water cooler arranged is connected with the air outlet of described gas-solid separator;
For being the first blower fan of the first pressure by offgas outlet pressure adjusting, described first blower fan is connected with the air outlet of described first water cooler;
Be connected with the outlet of described first blower fan the second blower fan arranged, described second blower fan by the pressure adjusting of described tail gas for being greater than described first pressure;
Deoxygenator, is communicated with described second blower fan and arranges; And
The drying installation be connected with described deoxygenator.
The air outlet of described drying installation and galvanization production line protect the inlet communication of gas to arrange.
Also comprise steam separator, it is arranged between described first water cooler and described first blower fan.
Be provided with benefit hydrogen system further, described benefit hydrogen system comprises the first surge tank and is communicated with the exhausting pipeline that arranges respectively with described first surge tank and enters hydrogen pipeline, and described first surge tank is arranged between described first blower fan and described second blower fan.
The other end of described exhausting pipeline is connected with spark arrester.
The second surge tank is communicated with the air outlet of described second blower fan.
Also comprise well heater and the second water cooler, described well heater is arranged between described second surge tank and described deoxygenator, and described second water cooler is arranged between described deoxygenator and described drying installation.
Be provided with detection system further; described detection system comprises the 3rd surge tank, hydrogen purity instrument, micro-oxygen instrument and the dew point hygrometer that connect successively; described 3rd surge tank is connected with the air outlet of described drying installation, and described dew point hygrometer and described galvanization production line protect the inlet communication of gas to arrange.
Technique scheme tool of the present utility model has the following advantages:
1, the galvanization production line that the utility model provides protects the device for recovering tail gas of gas; adopt open way of recycling initiatively; be specially; first blower fan is not directly connected with the offgas outlet of protection gas; but be arranged on the air outlet place of the first water cooler be connected with gas-solid separator; and the opening for feed of gas-solid separator and galvanization production line protect the offgas outlet of gas to be that non-tight is connected; the top hole pressure of tail gas is adjusted to the first pressure by the first blower fan, and the second blower fan by the pressure adjusting of described tail gas for being greater than the first pressure.Thus, device for recovering tail gas of the present utility model is by reducing the top hole pressure of tail gas and being controlled under the condition of pressure-fired, gas solid separation and cooling de-watering are carried out to remove the solid macrobead of sweeping along in tail gas to tail gas, dust, ash content, and the impurity such as water coolant, again by gas boost, for overcoming follow-up deoxidation, solid oxygen scavenger in dry link, siccative is to the resistance of gas, the more important thing is that the gas product for reclaiming provides a stable pressure, gas product is made to enter in galvanization production line with setting pressure, and this setting pressure must be greater than the top hole pressure of tail gas, thus between the import of protection gas and offgas outlet of galvanization production line, form a larger pressure difference, to guarantee gas continuing in whole device, steady flow, improve the stability of galvanization production line on the one hand, efficiently solve the problem of the pressure transient existing for galvanization production line of the prior art, also protection gas is made to form good flowing on the other hand in whole production line, ensure that zinc-plated belt surface can fully contact with hydrogen, avoid the generation of leak crossing phenomenon.
2, the device for recovering tail gas of the galvanization production line protection gas that the utility model provides, by the gas product meeting protection gas quality requirements obtained being sent in galvanization production line in addition cycling and reutilization, so far fully achieve the hydrogen in galvanization production line protection tail-gas and the recovery of nitrogen and recycle, considerably reduce the demand of galvanization production line for liquefied ammonia, and the electricity needed for electrolysis ammonia, make device of the present utility model can for galvanization production line often produce one ton of steel minimum save 80% cost, visible, device of the present utility model has the advantage of energy-conserving and environment-protective, thoroughly solve the defect of the low and contaminate environment of resource utilization existing for galvanization production line of the prior art.
3, the device for recovering tail gas of the galvanization production line protection gas that the utility model provides, be provided with for the benefit hydrogen system to hydrogen make-up in tail gas further, it comprises the first surge tank be arranged between the first blower fan and the second blower fan, and be communicated with the exhausting pipeline that arranges respectively with the first surge tank and enter hydrogen pipeline, this is because device of the present utility model is an open recycling device, show between offgas outlet and the opening for feed of gas-solid separator to be not be tightly connected, and the density of hydrogen is less, a small amount of hydrogen can be overflowed from tail gas, the content of hydrogen is caused to reduce, therefore can suitably hydrogen make-up to ensure that the hydrogen content in gas product can meet actual production demand.
4, the galvanization production line that the utility model provides protects the device for recovering tail gas of gas; its each integral part is all conventional equipment of the prior art; direct-assembling gets up and just can use; make apparatus structure of the present utility model simple, be convenient to install; and plant energy consumption of the present utility model is little; power consumption instrument needed for ammonolysis craft power consumption about 10%, can ignore for the economic benefit brought by it.
Accompanying drawing explanation
In order to be illustrated more clearly in the technical scheme of the utility model embodiment, below the accompanying drawing used required in describing embodiment is briefly described, apparently, accompanying drawing in the following describes is embodiments more of the present utility model, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
The structural representation of the device for recovering tail gas of the galvanization production line protection gas that Fig. 1 provides for the utility model;
Description of reference numerals:
1-gas-solid separator; 2-first water cooler; 3-first blower fan; 4-second blower fan; 5-deoxygenator; 6-drying installation; 7-steam separator; 8-first surge tank; 9-exhausting pipeline; 10-enters hydrogen pipeline; 11-spark arrester; 12-second surge tank; 13-well heater; 14-second water cooler; 15-the 3rd surge tank; 16-hydrogen purity instrument; The micro-oxygen instrument of 17-; 18-dew point hygrometer; 19-moisture eliminator; 20-galvanization production line.
Embodiment
Be clearly and completely described the technical solution of the utility model below in conjunction with accompanying drawing, obviously, described embodiment is the utility model part embodiment, instead of whole embodiments.Based on the embodiment in the utility model, those of ordinary skill in the art are not making the every other embodiment obtained under creative work prerequisite, all belong to the scope of the utility model protection.
In description of the present utility model, it should be noted that, term " first ", " second ", " the 3rd " only for describing object, and can not be interpreted as instruction or hint relative importance.In addition, unless otherwise clearly defined and limited, term " is connected ", " connection " should be interpreted broadly, and such as, can be fixedly connected with, also can be removably connect, or connect integratedly; Can be mechanical connection, also can be electrical connection; Can be directly be connected, also indirectly can be connected by intermediary, can be the connection of two element internals.For the ordinary skill in the art, particular case the concrete meaning of above-mentioned term in the utility model can be understood.
In addition, if below in the described different embodiment of the utility model involved technical characteristic do not form conflict each other and just can be combined with each other.
Embodiment 1
The device for recovering tail gas of the galvanization production line protection gas described in the present embodiment, as shown in Figure 1, comprising: gas-solid separator 1, its opening for feed and galvanization production line protect the offgas outlet of gas to be that non-tight is connected; The first water cooler 2 arranged is connected with the air outlet of described gas-solid separator 1; For by offgas outlet pressure adjusting being the first blower fan 3 of the first pressure, described first blower fan 3 is connected with the air outlet of described first water cooler 2; Be connected with the outlet of described first blower fan 3 the second blower fan 4 arranged, described second blower fan 4 by the pressure adjusting of described tail gas for being greater than described first pressure; Deoxygenator 5, is communicated with described second blower fan 4 and arranges; And the drying installation 6 to be connected with described deoxygenator 5.
Thus, device for recovering tail gas of the present utility model adopts open way of recycling, by reducing the top hole pressure of tail gas and being controlled under the condition of pressure-fired, gas solid separation and cooling de-watering are carried out to remove the solid macrobead of sweeping along in tail gas to tail gas, dust, ash content, and the impurity such as water coolant, again by gas boost, for overcoming follow-up deoxidation, solid oxygen scavenger in dry link, siccative is to the resistance of gas, the more important thing is that the gas product for reclaiming provides a stable pressure, gas product is made to enter in galvanization production line with setting pressure, and this setting pressure must be greater than the top hole pressure of tail gas, thus between the import of protection gas and offgas outlet of galvanization production line, form a larger pressure difference, to guarantee gas continuing in whole device, steady flow, improve the stability of galvanization production line on the one hand, efficiently solve the problem of the pressure transient existing for galvanization production line of the prior art, also protection gas is made to form good flowing on the other hand in whole production line, ensure that zinc-plated belt surface can fully contact with hydrogen, avoid the generation of leak crossing phenomenon.
The inlet communication of the protection gas of the air outlet of drying installation 6 and galvanization production line 20 arranges by the device for recovering tail gas in the present embodiment; preferably, described drying installation 6 by several be arranged in series, to be filled with molecular sieve be that the moisture eliminator 19 of siccative forms.By the gas product meeting protection gas quality requirements obtained being sent in galvanization production line in addition cycling and reutilization, so far the device for recovering tail gas of the present embodiment fully achieves the hydrogen in galvanization production line protection tail-gas and the recovery of nitrogen and recycle, considerably reduce the demand of galvanization production line for liquefied ammonia, and the electricity needed for electrolysis ammonia, make the device of the present embodiment can for galvanization production line often produce one ton of steel minimum save 80% cost, visible, device of the present utility model has the advantage of energy-conserving and environment-protective, thoroughly solve the defect of the low and contaminate environment of resource utilization existing for galvanization production line of the prior art.
For improving gas-solid separating effect, preferred described gas-solid separator 1 is cyclonic separator.In addition, the device for recovering tail gas of the present embodiment is also provided with steam separator 7, and it is between described first water cooler 2 and described first blower fan 3, to guarantee that solid matter in tail gas and saturated steam can be completely removed.
As selectable embodiment, the device described in the present embodiment is provided with benefit hydrogen system further, and described benefit hydrogen system comprises the first surge tank 8 and is communicated with the exhausting pipeline 9 that arranges respectively with described first surge tank 8 and enters hydrogen pipeline 10; Wherein, described first surge tank 8 is arranged between described first blower fan 3 and described second blower fan 4, and the other end of described exhausting pipeline 9 is connected with spark arrester 11, to prevent tempering of dropping a hint, is conducive to the safety performance improving device.
Under the pressure of rear for boosting gas phase is stabilized in a specified pressure better, at the air outlet place of described second blower fan 4, connection arranges the second surge tank 12 to the device described in the present embodiment further.Preferably, the device described in the present embodiment is also provided with well heater 13 between described second surge tank 12 and described deoxygenator 5, correspondingly, is also provided with the second water cooler 14 between described deoxygenator 5 and described drying installation 6, to carry out deep dehydration to gas phase.
As preferred embodiment; for ensureing the quality entering the protection gas of galvanization production line; device described in the present embodiment is provided with detection system further; described detection system comprises the 3rd surge tank 15, hydrogen purity instrument 16, micro-oxygen instrument 17 and the dew point hygrometer 18 that connect successively; described 3rd surge tank 15 is connected with the air outlet of described drying installation 6, and described dew point hygrometer 18 is arranged with the inlet communication of the protection gas of described galvanization production line 20.
Experimental example
Stopped on October 31st, 2014 from 27 days September in 2014, XHS-300 type galvanization production line is adopted to verify the device for recovering tail gas that the utility model provides, the condition of production is: Article 1 production line does not arrange device for recovering tail gas, Article 2 production line is provided with device for recovering tail gas of the present utility model, simultaneously the public preparing hydrogen by ammonia decomposition equipment of above-mentioned two production lines.Wherein, the computation process of device for recovering tail gas amount of energy saving is divided into following three phases:
First stage: equipment adjustment period, October 1 was to October 10;
Subordinate phase: the stationary phase of equipment, October 11 was to October 20;
Phase III: the operating period of equipment, October 21 was to October 31.
Concrete computation process is:
1, the ton steel before Line 1 output of steel * all consumes/liquefied ammonia ton valency=Line 1 liquefied ammonia consumption
First stage: 1519.111 tons * 7.231 yuan/3750 yuan=2.929 tons
Subordinate phase: 1568.921 tons * 7.231 yuan/3750 yuan=3.025 tons
Phase III: 1716.022 tons * 7.231 yuan/3750 yuan=3.366 tons
2, total liquefied ammonia consumption-Line 1 liquefied ammonia consumption=No. 2 line liquefied ammonia consumption
First stage: 8.69 tons-2.929 tons=5.761 tons
Subordinate phase: 8.12 tons-3.025 tons=5.095 tons
Phase III: 5.94 tons-3.366 tons=2.574 tons
3, No. 2 line liquefied ammonia consumption * liquefied ammonia ton valency/No. 2 line output of steel=actual liquefied ammonia all consume
First stage: 5.761 tons * 3750 yuan/3846.126 tons=5.617 yuan
Subordinate phase: 5.195 tons * 3750 yuan/3922.432 tons=4.871 yuan
Phase III: 2.574 tons * 3750 yuan/4376.249 tons=2.205 yuan
4, former ton molten steel ammonia all consumes-and ton molten steel ammonia that actual liquefied ammonia all consumes=saves all consumes
First stage: 7.231 yuan-5.617 yuan=1.614 yuan
Subordinate phase: 7.231 yuan-4.671 yuan=2.36 yuan
Phase III: 7.231 yuan-2.205 yuan=5.026 yuan
The electricity that the current consumption=reality of 5, saving the current consumption-retrieving arrangement of liquefied ammonia is saved
First stage: 1.614 yuan * 3846.126 tons/3.75*1.33-700 degree=1501 degree
Subordinate phase: 2.36 yuan * 3922.432 tons/3.75*1.33-700 degree=2583 degree
Phase III: 5.026 yuan * 4376.249 tons/3.75*1.33-700 degree=7100 degree
6, the electricity charge of the actual electricity charge/output of steel=ton steel saving of saving
First stage: 1501 degree * 0.55 yuan/3846.126 tons=0.214 yuan
Subordinate phase: 2583 degree * 0.55 yuan/3922.432 tons=0.362 yuan
Phase III: 7100 degree * 0.55 yuan/4376.249 tons=0.892 yuan
7, the ton molten steel ammonia saved all consumes+the ton steel electricity charge=ton steel expense of altogether saving of saving
First stage: 1.614 yuan+0.214 yuan=1.828 yuan
Subordinate phase: 2.36 yuan+0.362 yuan=2.722 yuan
Phase III: 5.026 yuan+0.892 yuan=5.918 yuan
As can be seen here, after device for recovering tail gas steady running of the present utility model, often producing one ton of steel and at least can save 5.918 yuan, is that 1.1 ten thousand tons of steel calculate according to the monthly output of current Article 2 production line, within 1 year, can save 11000 tons * 5.918 yuan * 12=781176 units, economic benefit is considerable.
Obviously, above-described embodiment is only for clearly example being described, and the restriction not to embodiment.For those of ordinary skill in the field, can also make other changes in different forms on the basis of the above description.Here exhaustive without the need to also giving all embodiments.And thus the apparent change of extending out or variation be still among the protection domain that the utility model creates.
Claims (8)
1. a device for recovering tail gas for galvanization production line protection gas, comprising:
Gas-solid separator (1), its opening for feed and galvanization production line protect the offgas outlet of gas to be that non-tight is connected;
The first water cooler (2) arranged is connected with the air outlet of described gas-solid separator (1);
For by offgas outlet pressure adjusting being first blower fan (3) of the first pressure, described first blower fan (3) is connected with the air outlet of described first water cooler (2);
Be connected with the outlet of described first blower fan (3) the second blower fan (4) arranged, described second blower fan (4) by the pressure adjusting of described tail gas for being greater than described first pressure;
Deoxygenator (5), is communicated with described second blower fan (4) and arranges; And
The drying installation (6) be connected with described deoxygenator (5).
2. device for recovering tail gas according to claim 1, is characterized in that, the air outlet of described drying installation (6) and galvanization production line protect the inlet communication of gas to arrange.
3. device for recovering tail gas according to claim 1 and 2, is characterized in that, also comprises steam separator (7), and it is arranged between described first water cooler (2) and described first blower fan (3).
4. device for recovering tail gas according to claim 1 and 2, it is characterized in that, be provided with benefit hydrogen system further, described benefit hydrogen system comprises the first surge tank (8) and is communicated with the exhausting pipeline (9) that arranges respectively with described first surge tank (8) and enters hydrogen pipeline (10), and described first surge tank (8) is arranged between described first blower fan (3) and described second blower fan (4).
5. device for recovering tail gas according to claim 4, is characterized in that, the other end of described exhausting pipeline (9) is connected with spark arrester (11).
6. device for recovering tail gas according to claim 1 and 2, is characterized in that, is communicated with the second surge tank (12) with the air outlet of described second blower fan (4).
7. device for recovering tail gas according to claim 6, it is characterized in that, also comprise well heater (13) and the second water cooler (14), described well heater (13) is arranged between described second surge tank (12) and described deoxygenator (5), and described second water cooler (14) is arranged between described deoxygenator (5) and described drying installation (6).
8. device for recovering tail gas according to claim 1 and 2; it is characterized in that; be provided with detection system further; described detection system comprises the 3rd surge tank (15), hydrogen purity instrument (16), micro-oxygen instrument (17) and the dew point hygrometer (18) that connect successively; described 3rd surge tank (15) is connected with the air outlet of described drying installation (6), and described dew point hygrometer (18) and described galvanization production line protect the inlet communication of gas to arrange.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520788821.6U CN205205211U (en) | 2015-10-12 | 2015-10-12 | Tail gas recovery unit of hot dip galvanization line protection gas |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201520788821.6U CN205205211U (en) | 2015-10-12 | 2015-10-12 | Tail gas recovery unit of hot dip galvanization line protection gas |
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| CN205205211U true CN205205211U (en) | 2016-05-04 |
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| CN201520788821.6U Withdrawn - After Issue CN205205211U (en) | 2015-10-12 | 2015-10-12 | Tail gas recovery unit of hot dip galvanization line protection gas |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105177483A (en) * | 2015-10-12 | 2015-12-23 | 廊坊广惠气体设备有限公司 | Tail gas recovery process and device for hot galvanizing production line protection gas |
| CN107419073A (en) * | 2017-08-29 | 2017-12-01 | 鞍钢集团工程技术有限公司 | A kind of cold rolled annealed Full Hydrogen Bell Type Annealing Furnace hydrogen recovery process and system |
-
2015
- 2015-10-12 CN CN201520788821.6U patent/CN205205211U/en not_active Withdrawn - After Issue
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105177483A (en) * | 2015-10-12 | 2015-12-23 | 廊坊广惠气体设备有限公司 | Tail gas recovery process and device for hot galvanizing production line protection gas |
| CN105177483B (en) * | 2015-10-12 | 2017-08-08 | 廊坊广惠气体设备有限公司 | A kind of galvanization production line protects the solvent recovery technology from vent gas and device of gas |
| CN107419073A (en) * | 2017-08-29 | 2017-12-01 | 鞍钢集团工程技术有限公司 | A kind of cold rolled annealed Full Hydrogen Bell Type Annealing Furnace hydrogen recovery process and system |
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Granted publication date: 20160504 Effective date of abandoning: 20170808 |
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