CN204193872U - A kind of preparation system of annealing furnace protective gas - Google Patents
A kind of preparation system of annealing furnace protective gas Download PDFInfo
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- CN204193872U CN204193872U CN201420679525.8U CN201420679525U CN204193872U CN 204193872 U CN204193872 U CN 204193872U CN 201420679525 U CN201420679525 U CN 201420679525U CN 204193872 U CN204193872 U CN 204193872U
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Abstract
The utility model discloses a kind of preparation system of annealing furnace protective gas; comprise nitrogen hydrogen mixing arrangement; described nitrogen hydrogen mixing arrangement is connected to hydrogen delivery tube, nitrogen carrier pipe and protection gas efferent duct; described hydrogen delivery tube and nitrogen carrier pipe are equipped with flowmeter and control valve, and protection gas efferent duct place is provided with hydrogen analyser.Common nitrogen and hydrogen are made full use of, after the mixing of nitrogen hydrogen mixing arrangement, obtain bell-type annealing furnace protection gas used, this apparatus structure is simple, floor space is little, reduced investment, and the protection gas obtained can meet bell-type annealing furnace completely and use; The hydrogen ratio of gaseous mixture can on-line continuous proportion adjustment, by improving gaseous mixture hydrogen ratio, improving surface quality and the annealing cycle shortening of annealed band, enhancing productivity; This device can protect gas for the preparation of bell-type annealing furnace, and also can be used for preparing continuous annealing furnace protection gas on continuous galvanizing line, also can be used for other needs nitrogen hydrogen to protect the occasion of gas.
Description
Technical field
The utility model relates to technical field prepared by annealing furnace protective gas body, specifically refers to a kind of preparation system of annealing furnace protective gas.
Background technology
Annealing furnace has extremely important effect at iron and steel metallurgical industry, it is mainly used as the chill steel band of heating to uniform temperature, keep its uniform temperature time enough, then with a kind of metal heating processing technology of Reasonable Speed cooling, its objective is and make to soften through cold rolling steel band, improve plasticity and toughness, thus make its chemical composition homogenising, residual stress is removed, and even obtains the physical property of some other expection.For ensureing the surface quality of annealed band, bright annealing (namely protecting gas annealing) is usually adopted to avoid the decarburization situation occurred in annealing process.The annealing of protection gas is in the annealing process of steel band, filling protection gas in stove, the normarzing annealing process of protection steel band.With regard to cold rolling; annealing furnace protective gas can be divided into nitrogen hydrogen to protect gas (gaseous mixture of 75% hydrogen and 25% nitrogen) and perhydro to protect gas (99.999% hydrogen) according to the difference of protection gas medium; wherein; perhydro gas shielded gas many employings coke-stove gas pressure-variable adsorption manufacturing process obtains; be applicable to equip and the higher perhydro annealing furnace of level of control, and nitrogen hydrogen protects gas to obtain the extensive use of iron and steel metallurgical industry because of features such as equipment manufacturing cost are low, safety coefficient is high, flexible and convenient operation, production cost are low.Preparation technology's many employings ammonolysis craft technique (this is the normal technological process that iron and steel metallurgical industry is known) of current nitrogen hydrogen protection gas, namely utilize liquefied ammonia for raw material, cracking liquefied ammonia obtains its mist, can obtain 2.64m after the cracking of per kilogram liquefied ammonia
3mist, wherein containing the hydrogen of 75% and the nitrogen of 25%.But when adopting ammonolysis craft technique; due to ammonia can not decompose very complete; obtaining in hybrid protection atmosphere often containing a small amount of residual ammonia (0.01%-0.1%); the Nitrogen Atom that pyrolysis produces trace can be there is in annealing furnace when residual ammonia enters operation; this Nitrogen Atom easily makes metal that slight nitriding occurs; this reduces greatly to the surface quality after strip anneal, especially stainless steel band, and Quality Down is even more serious.When adopting ammonolysis craft technique, need buying and store liquefied ammonia, because liquefied ammonia has corrosivity and effumability, therefore strict specification or regulation is had to the highway transportation of liquefied ammonia, stored on-site, Cemented filling and routine use, operate careless slightly will generation to block or leakage accident, may chemical accident be caused time serious, cause very large hidden danger to the personal safety of production, operating personnel.
Utility model content
The purpose of this utility model is to provide that a kind of low cost of manufacture, structure are simple, floor space is little, reduced investment, and can to the preparation system of the annealing furnace protective gas that nitrogen and hydrogen make full use of.
The utility model is achieved through the following technical solutions: a kind of preparation system of annealing furnace protective gas; comprise nitrogen hydrogen mixing arrangement; described nitrogen hydrogen mixing arrangement is connected to hydrogen delivery tube, nitrogen carrier pipe and protection gas efferent duct; described hydrogen delivery tube and nitrogen carrier pipe are equipped with flowmeter and control valve, and described protection gas efferent duct place is provided with hydrogen analyser.High-purity hydrogen and high pure nitrogen adopt Cemented filling mode, respectively through decompression, nitrogen hydrogen mixing arrangement is entered after metering, hydrogen analyser is equipped with at protection gas efferent duct, in order to analyze the ratio detecting hydrogen in gaseous mixture, according to the comparison of detected value and setting value, regulate the air inflow of nitrogen carrier pipe supplying nitrogen, thus ensure that the ratio of hydrogen and nitrogen in nitrogen hydrogen mixing arrangement reaches technique initialization requirement, then be transported in annealing furnace through protection gas efferent duct and use, hydrogen delivery tube can be passed through simultaneously, the flow of gas in input channel observed by flowmeter on nitrogen carrier pipe, pass through hydrogen delivery tube, the control valve at nitrogen carrier pipe place, regulate the input quantity of overall air-flow, annealing furnace is facilitated to use, the adjustment of density of hydrogen and flow can be ensured simultaneously.
In order to realize the utility model better, further, described nitrogen hydrogen mixing arrangement comprises blending tank and PLC control system, described flowmeter is equipped with the flow sensor be connected with PLC control system, described control valve is equipped with the controller be connected with PLC control system, and described PLC is connected with hydrogen analyser.PLC control system is adopted to control the mixed process of hydrogen and nitrogen in whole system, the ratio of hydrogen in gaseous mixture is detected by hydrogen analyser automatic analysis, then by signal transmission to PLC control system, PLC control system regulates the controller of nitrogen carrier pipe control valve automatically, the amount of control inputs nitrogen, thus make the ratio of hydrogen and nitrogen in mist keep constant, due to the use of PLC control system, whole system can be regulated by on-line continuous automatic ratio, greatly improve surface quality and the annealing cycle shortening of annealed band, alleviate the working strength of operating personnel, improve production efficiency, PLC control system can accept hydrogen delivery tube simultaneously, the flow signal of flow sensor transmission on the flowmeter of nitrogen carrier pipe configuration, automatic control hydrogen delivery tube, controller on nitrogen carrier pipe control valve carrys out the flow of control inputs gas, annealing furnace is facilitated to use.
In order to realize the utility model better, further, described hydrogen analyser is also connected with recorder.The data of hydrogen analyser record can be recorded, the maintenance facilitating staff daily and inspection.
In order to realize the utility model better, further, described protection gas efferent duct is also provided with control valve.Control valve is set at protection gas efferent duct, the flow velocity of annealing furnace can be entered by Control protection gas, make it be applied to annealing furnace better.
In order to realize the utility model better, further, described protection gas efferent duct is directly connected with annealing furnace.The direct output protection gas of protection gas efferent duct, can process without the need to other, directly import annealing furnace, use.
In order to realize the utility model better, further, described annealing furnace is bell-type annealing furnace.This device can for the preparation of the protection gas of bell-type annealing furnace; also can be used for the protection gas preparing continuous annealing furnace on continuous galvanizing line; other need nitrogen hydrogen to protect the occasion of gas also can use, as stainless steel continuous bright annealing furnace etc., and preferred bell-type annealing furnace here.
In order to realize the utility model better, further, described flowmeter all adopts explosion-proof flowmeter.Flowmeter explosive-proof grade DIICT4 meets national requirements, is applicable to the nitrogen hydrogen proportion adjustment of large discharge, required precision percentage level.
In order to realize the utility model better, further, the described hydrogen delivery tube other end is connected with hydrogen storage tank, and the nitrogen carrier pipe other end is connected with nitrogen storage tank.
The utility model compared with prior art, has the following advantages and beneficial effect:
(1) this apparatus structure is simple, floor space is little, reduced investment, and the protection gas obtained can meet bell-type annealing furnace completely and use;
(2) manufacturing cost of nitrogen and hydrogen mixture is well below decomposed ammonia cost, and the security that nitrogen hydrogen mixing arrangement runs and environmental protection coefficient are far above ammonolysis craft unit;
(3) this plant automation degree is high, adopt PLC moduleization design, instrument and meter all adopts Explosion-proof Design, be applicable to the nitrogen hydrogen proportion adjustment of large discharge, required precision percentage level, can regulate and also the ratio of hydrogen can regulate arbitrarily continuously in remote auto Control protection gas by on-site manual, distributing precision can reach ± 1% within;
(4) because the hydrogen ratio of gaseous mixture can on-line continuous proportion adjustment, so by improving the measure of gaseous mixture hydrogen ratio, surface quality and the annealing cycle shortening of annealed band can be improved, thus enhance productivity;
(5) this device can protect gas for the preparation of bell-type annealing furnace, and also can be used for preparing continuous annealing furnace protection gas on continuous galvanizing line, also can be used for other needs nitrogen hydrogen to protect the occasion of gas, such as stainless steel continuous bright annealing furnace etc.
Accompanying drawing explanation
Fig. 1 is structural principle schematic block diagram of the present utility model;
Fig. 2 is structural schematic block diagram in enforcement 2 of the present utility model.
Detailed description of the invention
Be described below in detail embodiment of the present utility model, the example of described embodiment is shown in the drawings, and wherein same or similar label represents same or similar element or has element that is identical or similar functions from start to finish.Being exemplary below by the embodiment be described with reference to the drawings, only for explaining the utility model, and can not being interpreted as restriction of the present utility model.
In description of the present utility model, it will be appreciated that, term " " center ", " longitudinal direction ", " transverse direction ", " on ", D score, " front ", " afterwards ", " left side ", " right side ", " vertically ", " level ", " top ", " end ", " interior ", orientation or the position relationship of the instruction such as " outward " are based on orientation shown in the drawings or position relationship, only the utility model and simplified characterization for convenience of description, instead of indicate or imply that the device of indication or element must have specific orientation, with specific azimuth configuration and operation, therefore can not be interpreted as restriction of the present utility model.In addition, term " first ", " second " only for describing object, and can not be interpreted as instruction or hint relative importance or imply the quantity indicating indicated technical characteristic.Thus, be limited with " first ", " second " only for describing object, and instruction or hint relative importance can not be interpreted as or impliedly comprise one or more these features.In description of the present utility model, except as otherwise noted, the implication of " multiple " is two or more.
In description of the present utility model, it should be noted that, unless otherwise clearly defined and limited, term " installation ", " being 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; Also can be directly be connected, also can be indirectly be connected by intermediary, can be the connection of two element internals.For the ordinary skill in the art, concrete condition the concrete meaning of above-mentioned term in the utility model can be understood.
Embodiment 1:
The primary structure of the present embodiment; as shown in Figure 1; comprise nitrogen hydrogen mixing arrangement; described nitrogen hydrogen mixing arrangement is connected to hydrogen delivery tube, nitrogen carrier pipe and protection gas efferent duct; described hydrogen delivery tube and nitrogen carrier pipe are equipped with flowmeter and control valve, and described protection gas efferent duct place is provided with hydrogen analyser.
Wherein, described protection gas efferent duct is also provided with control valve, and described protection gas efferent duct exports the mouth of pipe and is directly connected with bell-type annealing furnace, and described flowmeter all adopts explosion-proof flowmeter; the described hydrogen delivery tube other end is connected with hydrogen storage tank, and the nitrogen carrier pipe other end is connected with nitrogen storage tank.
Specific implementation process:
1) to produce or outsourcing high-purity hydrogen, require hydrogen purity >=99.99%, residual oxygen≤lppm, dew point≤-60 DEG C, pressure stability;
2) to produce or outsourcing high pure nitrogen, require nitrogen gas purity >=99.99%, residual oxygen≤lppm, dew point≤-60 DEG C, pressure stability;
3) high-purity hydrogen and high pure nitrogen adopt Cemented filling mode; nitrogen hydrogen mixing arrangement is entered respectively after decompression, metering; the protection gas efferent duct connected in the outlet of nitrogen hydrogen mixing arrangement is equipped with hydrogen analyser; the ratio of hydrogen in gaseous mixture is detected in order to automatic analysis; according to the comparison of detected value and setting value; regulate the air inflow of blending tank inlet Nitrogen gas; thus ensure that the ratio of hydrogen and nitrogen in nitrogen hydrogen blending tank reaches technique initialization requirement, be then transported in bell-type annealing furnace through protection gas efferent duct.The protection gas mixed proportion that usual bell-jar nitrogen hydrogen annealing stove requires is the hydrogen of 75% and the nitrogen of 25%; also other ratio can be mixed into according to technological requirement; such as containing 5% hydrogen and 95% nitrogen or 99.99% perhydro gas, to be applicable to the use of more annealing furnace protective gas.
Embodiment 2:
The present embodiment furthermore achieved that automatic control function on the basis of embodiment 1, as shown in Figure 2, described nitrogen hydrogen mixing arrangement comprises blending tank and PLC control system, described flowmeter is equipped with the flow sensor be connected with PLC control system, described control valve is equipped with the controller be connected with PLC control system, and described PLC is connected with hydrogen analyser.PLC control system is adopted to control the mixed process of hydrogen and nitrogen in whole system, the ratio of hydrogen in gaseous mixture is detected by hydrogen analyser automatic analysis, then by signal transmission to PLC control system, PLC control system regulates the controller of nitrogen carrier pipe control valve automatically, the amount of control inputs nitrogen, thus make the ratio of hydrogen and nitrogen in mist keep constant, due to the use of PLC control system, whole system can be regulated by on-line continuous automatic ratio, greatly improve surface quality and the annealing cycle shortening of annealed band, alleviate the working strength of operating personnel, improve production efficiency, PLC control system can accept hydrogen delivery tube simultaneously, the flow signal of flow sensor transmission on the flowmeter of nitrogen carrier pipe configuration, automatic control hydrogen delivery tube, controller on nitrogen carrier pipe control valve carrys out the flow of control inputs gas, annealing furnace is facilitated to use.Other parts of the present embodiment are identical with embodiment 1, repeat no more.
Being understandable that, is all prior art according to the operation principle of the parts such as PLC control system and blending tank in the utility model and the course of work, and known by those skilled in the art, is just no longer described in detail here.
In the description of this description, specific features, structure, material or feature that the description of reference term " embodiment ", " some embodiments ", " illustrative examples ", " example ", " concrete example " or " some examples " etc. means to describe in conjunction with this embodiment or example are contained at least one embodiment of the present utility model or example and combine in an appropriate manner.
Although illustrate and described embodiment of the present utility model, those having ordinary skill in the art will appreciate that: do not departing under principle of the present utility model and aim and can carry out multiple change, amendment, replacement and modification to these embodiments, scope of the present utility model is by claim and equivalents thereof.
Claims (8)
1. the preparation system of an annealing furnace protective gas; it is characterized in that: comprise nitrogen hydrogen mixing arrangement; described nitrogen hydrogen mixing arrangement is connected to hydrogen delivery tube, nitrogen carrier pipe and protection gas efferent duct; described hydrogen delivery tube and nitrogen carrier pipe are equipped with flowmeter and control valve, and described protection gas efferent duct place is provided with hydrogen analyser.
2. the preparation system of a kind of annealing furnace protective gas according to claim 1; it is characterized in that: described nitrogen hydrogen mixing arrangement comprises blending tank and PLC control system; described flowmeter is equipped with the flow sensor be connected with PLC control system; described control valve is equipped with the controller be connected with PLC control system, and described PLC is connected with hydrogen analyser.
3. the preparation system of a kind of annealing furnace protective gas according to claim 1 and 2, is characterized in that: described hydrogen analyser is also connected with recorder.
4. the preparation system of a kind of annealing furnace protective gas according to claim 1 and 2, is characterized in that: described protection gas efferent duct is also provided with control valve.
5. the preparation system of a kind of annealing furnace protective gas according to claim 1 and 2, is characterized in that: described protection gas efferent duct is directly connected with annealing furnace.
6. the preparation system of a kind of annealing furnace protective gas according to claim 5, is characterized in that: described annealing furnace is bell-type annealing furnace.
7. the preparation system of a kind of annealing furnace protective gas according to claim 1 and 2, is characterized in that: described flowmeter all adopts explosion-proof flowmeter.
8. the preparation system of a kind of annealing furnace protective gas according to claim 1 and 2, is characterized in that: the described hydrogen delivery tube other end is connected with hydrogen storage tank, and the nitrogen carrier pipe other end is connected with nitrogen storage tank.
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| CN201420679525.8U CN204193872U (en) | 2014-11-14 | 2014-11-14 | A kind of preparation system of annealing furnace protective gas |
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| CN201420679525.8U CN204193872U (en) | 2014-11-14 | 2014-11-14 | A kind of preparation system of annealing furnace protective gas |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107557563A (en) * | 2017-08-30 | 2018-01-09 | 天津市宇润德金属制品有限公司 | High energy-saving reducing furnace |
| CN108690905A (en) * | 2017-04-07 | 2018-10-23 | 江油立航金属材料有限公司 | The stainless steel hot processing protection gas circulatory system |
| CN108690904A (en) * | 2017-04-07 | 2018-10-23 | 江油立航金属材料有限公司 | Stainless steel hot processing protection gas circulation utilization method |
| CN110479123A (en) * | 2019-09-24 | 2019-11-22 | 苏州宏博净化设备有限公司 | Intelligent automatic hydrogen nitrogen matching device |
| CN114540598A (en) * | 2022-02-07 | 2022-05-27 | 中冶南方工程技术有限公司 | Cold rolling annealing furnace protective gas supply and recycling method |
-
2014
- 2014-11-14 CN CN201420679525.8U patent/CN204193872U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108690905A (en) * | 2017-04-07 | 2018-10-23 | 江油立航金属材料有限公司 | The stainless steel hot processing protection gas circulatory system |
| CN108690904A (en) * | 2017-04-07 | 2018-10-23 | 江油立航金属材料有限公司 | Stainless steel hot processing protection gas circulation utilization method |
| CN107557563A (en) * | 2017-08-30 | 2018-01-09 | 天津市宇润德金属制品有限公司 | High energy-saving reducing furnace |
| CN110479123A (en) * | 2019-09-24 | 2019-11-22 | 苏州宏博净化设备有限公司 | Intelligent automatic hydrogen nitrogen matching device |
| CN114540598A (en) * | 2022-02-07 | 2022-05-27 | 中冶南方工程技术有限公司 | Cold rolling annealing furnace protective gas supply and recycling method |
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