CN103940213B - Coke drying system is dried temperature and saves control device and method with flow quantity self-adjusting - Google Patents
Coke drying system is dried temperature and saves control device and method with flow quantity self-adjusting Download PDFInfo
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- CN103940213B CN103940213B CN201410138216.4A CN201410138216A CN103940213B CN 103940213 B CN103940213 B CN 103940213B CN 201410138216 A CN201410138216 A CN 201410138216A CN 103940213 B CN103940213 B CN 103940213B
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Abstract
The invention discloses a kind of coke drying system and be dried temperature and flow quantity self-adjusting joint control method and device, before and after heat exchanger, two ends arrange high temperature and low temperature waste gas arm, arm arranges flow control valve, the dry gas house steward after air-introduced machine arranges temperature sensor；Realize high-temp waste gas by the Flux Valve Control in temperature sensor and two arms to mix with low temperature waste gas to the temperature required for coke stoving process.The present invention is not by arranging high temperature and low temperature two takes waste gas of hot-blast stove flue arm at waste gas of hot-blast stove flue heat exchanger front and back position, by the feedback of temperature sensor, the flow of two arms is controlled, not only can realize being dried the self-regulating function of temperature, but also flue gas heat classification recycling that air stove is given up can be realized, avoid the waste of waste-gas heat, there is significant economic and energy saving benefit.
Description
Technical field
The invention belongs to regulation, control technical field, can be used for smelting iron and steel industry coke drying system is dried temperature and stream
The regulation of amount controls, and is specifically related to a kind of coke drying system and is dried temperature and flow quantity self-adjusting joint control device and method.
Background technology
Coke is requisite raw material in blast furnace iron-making process, and blast fumance stability, Technological Economy are referred to by its quality
Mark and blast furnace crucibe life-span are most important.Due to coke water content producing, store, change during transport etc. very big, cause
Feeding density charcoal water content is higher, and coke moisture fluctuation can cause weighing inaccurate, thus it is stable to affect the working of a furnace.Research shows, burnt
Charcoal water content often increases by 1%, will increase blast-furnace coke consumption 1.1%～1.3%；When coke water content is more than 4%, then stove dust quantity is bright
Aobvious rising, smooth operation of furnace is deteriorated.Thus, reduce smelter coke water content and there is economy, environmental protection and energy-saving benefit significantly.
For reducing this problem of smelter coke water content, domestic metallargist proposes and utilizes exhaust gas of hot-blast stove waste heat STRENGTH ON COKE
Preheat, reduce the coke stoving process of coke moisture purpose.The useless cigarette produced when exhaust gas of hot-blast stove is Combustion of Hot Air Furnace
Gas, its key component is the inert medias such as CO2, N2, and temperature can reach about 300 DEG C, and after heat exchanger, its temperature is reduced to
About 150 DEG C.In existing report, exhaust gas of hot-blast stove is utilized to specifically include that Publication No. CN as the patent of thermal source
The Chinese patent of 203007295U discloses a kind of novel blast-furnace exhaust gas of hot-blast stove classification recycle device, and this device is by setting
Put cold wind blend valve exhaust gas of hot-blast stove temperature is carried out cooling regulation；The Chinese patent of Publication No. CN102538491A is open
A kind of system and method utilizing waste gas of hot-blast stove flue baking preheating blast furnace burden, this system controls valve by arranging benefit wind,
Air is introduced feed bin by secondary air channel road.
The general character of above coke pre-heating drying technique is: is provided with air duct in a device and is dried the temperature regulation of gas
With drive remainder of exhaust gas.But said method is in implementation process, do not account for cold air enter coke drying system brought as
Lower negative effect: (1) coke is a kind of fuel that blast furnace ironmaking provides heat, and cold air can make the oxygen content being dried gas raise,
Coke is caused to there is the potential safety hazard of spontaneous combustion in the environment of high temperature, elevated oxygen level；(2) cold air regulation is used to be dried temperature,
The heat that exhaust gas of hot-blast stove is valuable can be wasted to a certain extent.Additionally, due to said method lacks, exhaust gas flow is adjusted
Means, thus the stable operation in the case of variable working condition cannot be met, it is impossible to realize the economy to waste-gas heat, Appropriate application.
Summary of the invention
In view of this, an object of the present invention is to provide a kind of coke drying system and is dried temperature and flow quantity self-adjusting joint control dress
Putting, this device utilizes temperature cascade to control loop and flow serials control loop, realizes air stove flue gas heat classification of giving up respectively and returns
Receive and utilize, and control accurate to system and maintain the stable operation in the case of variable working condition.
It is an object of the invention to be achieved through the following technical solutions, coke drying system is dried temperature and flow quantity self-adjusting joint control
Device processed, including heat exchanger, also includes high-temp waste gas arm and the low temperature waste gas arm being separately positioned on heat exchanger rear and front end,
Described high-temp waste gas arm and low temperature waste gas arm are connected with dry gas house steward, and described dry gas house steward is provided with temperature sensor；
It is provided with first-class adjustable valve on described high-temp waste gas arm, described low temperature waste gas arm is provided with second adjustable valve,
Described temperature sensor is for detecting the temperature of dry gas, at temperature sensor, first-class adjustable valve, second adjustable valve
Under three's common feedback regulation effect, control waste gas of hot-blast stove flue high temperature and two waste gas arm flows of low temperature, it is achieved high temperature gives up
Gas mixes with low temperature waste gas to the temperature required for coke stoving process.
Further, the pipeline after air-introduced machine is disposed with the 3rd flow control valve and flow transducer.
The two of the purpose of the present invention are to provide a kind of coke drying system and are dried temperature and flow quantity self-adjusting joint control method, and coke dries
Dry systems is dried temperature and saves control method with flow quantity self-adjusting, is respectively provided with high temperature at waste gas of hot-blast stove flue heat exchanger front and back position
Waste gas arm and low temperature waste gas arm, arrange temperature sensor on waste gas header；By high-temp waste gas arm and low temperature waste gas arm
Respectively by flow control valve, under the feedback regulation of temperature sensor, control the flow of high-temp waste gas arm and low temperature waste gas arm,
By the temperature required for the two mixing to coke stoving process, and as the dry source of the gas of coke drying system, then by preparation
Dry gas causes burnt groove and is dried by coke.
Further, the temperature of described dry gas is 200 DEG C～300 DEG C.
Further, described dry gas causes burnt groove by flow control valve.
Advantageous Effects:
1) by not arranging high temperature and low temperature two takes waste gas of hot-blast stove flue and props up at waste gas of hot-blast stove flue heat exchanger front and back position
Pipe, not only can realize being dried the self-regulating function of temperature, but also can realize flue gas heat classification recycling of giving up air stove,
Avoid the waste of waste-gas heat, there is significant economic and energy saving benefit；
2) owing to being not provided with cold-air duct, can be that coke is dried and provided inertia (oxygen content is low) environment, effectively ensure and be
The safety that system runs, eliminates potential safety hazard, thus has safe and reliable advantage；
3) flow transducer and regulation valve are set on dry gas house steward, the pressure on house steward can be made to keep constant, pass through valve opening
Exhaust gas flow is carried out unitary variant and follows the tracks of regulation, it is easy to accomplish accurate, the stable regulation of variable working condition；
4) air-introduced machine is in all the time and determines operating mode operation, it is possible to decrease fault rate, thus extends its service life, plays and reduces investment
Effect；
5) automatic control level of system can be improved, reduce working strength and the difficulty of Systems Operator.
Accompanying drawing explanation
In order to make the object, technical solutions and advantages of the present invention clearer, below in conjunction with accompanying drawing, the present invention is made further
Describe in detail, wherein:
Fig. 1 is that coke drying system is dried temperature and flow quantity self-adjusting joint control method and apparatus structure schematic diagram；
In figure: 1, air stove；2, air stove is given up flue；3, high-temp waste gas arm；4, electric butterfly valve；5, flow is adjusted
Joint valve；6, flow control valve；7, electric butterfly valve；8, low temperature waste gas arm；9, heat exchanger；10, air stove chimney；11、
Temperature sensor；12, it is dried gas house steward；13, air-introduced machine；14, flow transducer；15, flow control valve；16, burnt groove；
17, axial flow blower.
Detailed description of the invention
Below with reference to accompanying drawing, the preferred embodiments of the present invention are described in detail；Should be appreciated that preferred embodiment is only
The explanation present invention rather than in order to limit the scope of the invention.
As it is shown in figure 1, be dried the example structure schematic diagram of temperature and flow quantity self-adjusting joint control device for coke drying system.
The coke drying system of the present embodiment is dried temperature and controls device, including air stove 1, heat exchanger 9, hot blast with flow quantity self-adjusting joint
Stove chimney 10, air-introduced machine 13, burnt groove 16 and axial flow blower 17；Useless flue gas in described air stove 1 gives up flue gas through air stove
Pipeline 2 is transported to heat exchanger 9, is respectively provided with high-temp waste gas arm 3 and low temperature waste gas arm 8 at the two ends of heat exchanger, at high temperature
Electric butterfly valve 4 and first-class adjustable valve 5 is set gradually along gas flow, along gas on low temperature waste gas arm on waste gas arm
The flow direction sets gradually electric butterfly valve 7 and second adjustable valve 6, and the end of two arms is connected with dry gas house steward 12 after converging,
Being dried gas house steward 12 to be connected with air-introduced machine 13, air-introduced machine, burnt groove 16 and axial flow blower 17 are sequentially connected with.Described dry gas is total
It is provided with temperature sensor 11 on pipe, sets gradually flow transducer 14 and the 3rd stream connecting air-introduced machine on the pipeline of burnt groove
Adjustable valve 15.
Being partly into high-temp waste gas arm from air stove waste gas out, another part enters heat exchanger；From heat exchanger out
A waste gas part is discharged through air stove chimney, and another part enters low temperature waste gas arm, and the waste gas in two arms carries through air-introduced machine
Dry to burnt groove STRENGTH ON COKE.
It is dried temperature below in conjunction with above-mentioned coke drying system with flow quantity self-adjusting joint control device, coke drying system of the present invention to be done
Dryness temperature elaborates with the detailed description of the invention of flow quantity self-adjusting joint control method.
The coke drying system of the present embodiment is dried temperature and saves control method with flow quantity self-adjusting, utilizes the draft of air-introduced machine 13, will
The outer waste discharge flue gas of air stove mixes through high-temp waste gas arm 3 and low temperature waste gas arm 8, logical under the feedback regulation of temperature sensor
Cross the flow of aperture control high-temp waste gas arm and the low temperature waste gas arm controlling first-class adjustable valve and second adjustable valve,
By the temperature required for the two mixing to coke stoving process, it is dried (200 DEG C of gas as the direct medium drying coke moisture
～300 DEG C), then the dry gas of preparation is caused burnt groove and coke is dried, finally by axial flow blower 17 by being dried after preheating
Outer row after gas removing dust.
The present embodiment is dried gas before entering burnt groove 16, is opened by the valve of flow transducer 14 feedback control flow control valve 15
Degree regulates the flow of dry gas to the flow required for coke stoving process.
The present invention is by being respectively provided with high temperature and low temperature two takes hot-blast stove flue and gives up at waste gas of hot-blast stove flue heat exchanger front and back position
Gas branch pipe, is controlled the flow of two arms by the feedback of temperature sensor, not only can realize being dried the self-regulation of temperature
Function, but also flue gas heat classification recycling that air stove is given up can be realized, it is to avoid the waste of waste-gas heat, have significantly
Economic and energy saving benefit.
The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, it is clear that those skilled in the art can
The present invention is carried out various change and modification without departing from the spirit and scope of the present invention.So, if these of the present invention are repaiied
Change and belong within the scope of the claims in the present invention and equivalent technologies thereof with modification, then the present invention is also intended to comprise these changes and become
Including type.
Claims (4)
1. coke drying system is dried temperature and flow quantity self-adjusting joint control device, the regulation control of temperature and flow it is dried in smelting iron and steel industry coke drying system, this control device includes heat exchanger, it is characterized in that: also include being separately positioned on high-temp waste gas arm and the low temperature waste gas arm of heat exchanger rear and front end, described high-temp waste gas arm and low temperature waste gas arm are connected with dry gas house steward, and described dry gas house steward is provided with temperature sensor；It is provided with first-class adjustable valve on described high-temp waste gas arm, it is provided with second adjustable valve on described low temperature waste gas arm, described temperature sensor is for detecting the temperature of dry gas, under temperature sensor, first-class adjustable valve, second adjustable valve three's common feedback regulation effect, control waste gas of hot-blast stove flue high temperature and two waste gas arm flows of low temperature, realizing high-temp waste gas to mix with low temperature waste gas to the temperature required for coke stoving process, mixed dry gas causes burnt groove and is dried by coke.
Coke drying system the most according to claim 1 is dried temperature and controls device with flow quantity self-adjusting joint, it is characterised in that: it is disposed with the 3rd flow control valve and flow transducer on the pipeline after air-introduced machine.
3. a coke drying system as claimed in claim 1 is dried temperature and saves the control method controlling device with flow quantity self-adjusting, it is characterized in that: be respectively provided with high-temp waste gas arm and low temperature waste gas arm at waste gas of hot-blast stove flue heat exchanger front and back position, waste gas header arranges temperature sensor；High-temp waste gas arm and low temperature waste gas arm are passed through flow control valve respectively, the flow of high-temp waste gas arm and low temperature waste gas arm is controlled under the feedback regulation of temperature sensor, by the temperature required for the two mixing to coke stoving process, and as the dry source of the gas of coke drying system, then the dry gas of preparation is caused burnt groove coke is dried；Described dry gas causes burnt groove by flow control valve.
Coke drying system the most according to claim 3 is dried the control method of temperature and flow quantity self-adjusting joint control device, it is characterised in that: the temperature of described dry gas is 200 DEG C ~ 300 DEG C.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410138216.4A CN103940213B (en) | 2014-04-08 | 2014-04-08 | Coke drying system is dried temperature and saves control device and method with flow quantity self-adjusting |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410138216.4A CN103940213B (en) | 2014-04-08 | 2014-04-08 | Coke drying system is dried temperature and saves control device and method with flow quantity self-adjusting |
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| CN103940213A CN103940213A (en) | 2014-07-23 |
| CN103940213B true CN103940213B (en) | 2016-08-31 |
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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104482751B (en) * | 2014-12-11 | 2017-02-22 | 华南农业大学 | Method and device for eliminating thermal inertia of hot air drier |
| CN106066620A (en) * | 2016-08-22 | 2016-11-02 | 四川华索自动化信息工程有限公司 | A kind of signal based on technology of Internet of things multistage scale-up version flue temperature monitoring system |
| CN110030795B (en) * | 2019-04-25 | 2023-10-20 | 中冶赛迪技术研究中心有限公司 | Coke drying system and process |
| CN111457674A (en) * | 2020-05-19 | 2020-07-28 | 中冶赛迪工程技术股份有限公司 | Coke drying process and drying device |
| CN113755661B (en) * | 2020-06-01 | 2023-02-14 | 中冶长天国际工程有限责任公司 | Control method of blast furnace hot blast stove flue gas air intake system for coke drying |
| CN113755659B (en) * | 2020-06-01 | 2023-02-14 | 中冶长天国际工程有限责任公司 | Control method of blast furnace hot blast stove flue gas air intake system |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US6151795A (en) * | 1997-06-13 | 2000-11-28 | Mmats Incorporated | Flat material dryer |
| JP3784023B2 (en) * | 2003-05-29 | 2006-06-07 | 月島機械株式会社 | Drying equipment and method of operating the drying equipment |
| CN202512060U (en) * | 2012-02-15 | 2012-10-31 | 深圳市赛宝伦计算机技术有限公司 | Nox analyzer |
| CN203007295U (en) * | 2013-01-11 | 2013-06-19 | 莱芜钢铁集团有限公司 | Novel blast-furnace hot blast stove exhaust gas classification recycle device |
| CN103122398B (en) * | 2013-03-13 | 2015-01-28 | 中冶赛迪工程技术股份有限公司 | Smoke self-circulation preheating coal dust injection technology and device |
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