阅读说明：本技术 一种焦炉加热燃烧控制方法及系统 (A kind of coke oven heating method for controlling combustion and system ) 是由 陈勇波 邹婵 盛荣芬 赵怀宽 黄天红 于 2019-09-03 设计创作，主要内容包括：一种焦炉加热燃烧控制方法及系统,所述方法包括步骤：S1：根据单管煤气量,计算单个燃烧室所需空气进风量；S2：根据单个燃烧室所需空气进风量,调节单个蓄热室空气进风口开度；S3：根据蓄热室下降气流蓄顶吸力与标准蓄热室蓄顶吸力偏差变化范围,修正所述蓄热室空气进风口开度；S4：根据蓄热室底部小烟道氧含量数据反馈,调整空气进风口开度；S5：根据蓄热室空气进风量,调整外部循环废气量；S6：根据炉顶空间温度,修正外部循环废气量。本发明提供了最优化的空气进风量控制结构改造方案,最大程度降低对原焦炉结构破坏,实现燃烧过程空气量的自动调节。(A kind of coke oven heating method for controlling combustion and system, the method includes the steps: S1: according to single tube gas volume, air intake needed for calculating single combustion chamber；S2: according to air intake needed for single combustion chamber, single accumulation of heat room air air inlet aperture is adjusted；S3: top suction is stored according to regenerative chamber down current and standard regenerative chamber stores top suction change of error range, corrects the accumulation of heat room air air inlet aperture；S4: according to regenerator bottom bottom flue oxygen content data feedback, air air inlet aperture is adjusted；S5: according to accumulation of heat room air intake, outer loop exhausted air quantity is adjusted；S6: according to furnace roof space temperature, outer loop exhausted air quantity is corrected.It the present invention provides the air intake control structure modification scheme of optimization, utmostly reduces and former coke oven construction is destroyed, realize the automatic adjustment of combustion process air capacity.)

1. a kind of coke oven heating method for controlling combustion, which is characterized in that the method includes the steps:

S1: according to single tube gas volume, air intake needed for calculating single combustion chamber；

S2: according to air intake needed for single combustion chamber, single accumulation of heat room air air inlet aperture is adjusted；

S3: top suction is stored according to regenerative chamber down current and standard regenerative chamber stores top suction change of error range, corrects the storage Hot cell air air inlet aperture；

S4: according to regenerator bottom bottom flue oxygen content data feedback, air air inlet aperture is adjusted；

S5: according to accumulation of heat room air intake, outer loop exhausted air quantity is adjusted；

S6: according to furnace roof space temperature, outer loop exhausted air quantity is corrected.

2. a kind of coke oven heating combustion control system, which is characterized in that the system comprises:

Furnace roof space temperature feedback control module judges that charge of coke heating is high to uniform for the raw gas temperature data according to acquisition Property, and the outer loop exhaust gas branch pipe valve opening of respective combustion chamber is adjusted when being lower than given threshold to change exhaust gas blending amount； The furnace roof space temperature feedback control module includes raw gas temperature acquisition module and outer loop exhaust gas branch pipe at tedge Valve, for being acquired to raw gas temperature, the outer loop exhaust gas manifold valve is used for the raw gas temperature acquisition module Itself aperture is adjusted to change exhaust gas blending amount；

Cycle gas-coal gas feedforward control module, for opening empty when branch gas tube valve opening adjusts and is more than given threshold Tolerance-external exhaust gas internal circulating load automatic control flow chart；The cycle gas-coal gas feedforward control module includes single hole gas flow Regulating valve, air air inlet regulating valve and the outer loop exhaust gas manifold valve；The single hole gas flow regulating valve is for adjusting The branch gas tube valve opening is saved, the air air inlet regulating valve is used to adjust to be contained by the air that air air inlet enters Amount, the outer loop exhaust gas manifold valve for adjusting exhaust gas blending amount, follow by the air air inlet regulating valve and the outside Ring exhaust gas manifold valve collectively forms the air capacity-external exhaust gas internal circulating load automatic control flow chart；

Top suction coordinating control module is stored, for storing top suction value and oxygen content data, judgement according to the down current of acquisition Whether exhaust gas disc air air inlet aperture and outer loop exhaust gas branch pipe control valve opening reach target aperture；The storage pushes up suction Coordinating control module includes that down current stores top suction acquisition module, oxygen content data acquisition module, exhaust gas disc air air inlet Regulating valve and outer loop waste gas regulating valve；The down current stores top suction acquisition module and inhales for acquiring down current and storing to push up Force value, the oxygen content data acquisition module is for acquiring regenerator bottom oxygen content data, the exhaust gas disc air air inlet Regulating valve is for adjusting exhaust gas disc air air inlet aperture, and the outer loop waste gas regulating valve is for adjusting outer loop exhaust gas Branch pipe aperture；

Divide flue-storage top suction coordinating control module, for storing top suction value by collected down current and dividing flue Total suction value, judges whether exhaust gas disc air conditioning valve opening and overshoot quantity reach the limit values, and when the limit value is reached, opens It is dynamic that the automatic adjustment of flue suction force baffle is divided to realize the equilibrium assignment for storing top suction again；Described point of flue-storage top suction coordinates control Molding block include down current store top suction acquisition module, divide flue suction force data acquisition module, exhaust gas disc air control valve and Divide flue suction force regulating valve；The down current stores top suction acquisition module and stores top suction value for acquiring down current, described Flue suction force data acquisition module is divided to divide flue suction force value for acquiring, the exhaust gas disc air control valve is opened for adjusting itself Degree, it is described divide flue suction force regulating valve for start divide flue suction force baffle automatic adjustment.

3. coke oven heating combustion control system according to claim 2, which is characterized in that the exhaust gas disc air air inlet Regulating valve is mounted on air inlet below exhaust gas disc air cover board.

4. coke oven heating combustion control system according to claim 2 or 3, which is characterized in that the exhaust gas disc air into Air port regulating valve includes the ventilation opening that setting is connect with air inlet bottom, is provided on first lateral surface of ventilation opening and pneumatically holds Row device, the pneumatic actuator are equipped with locator outside, are provided with and communicated with gas between the pneumatic actuator and the locator Bigeminy part is moved, is provided with several shutter boards in the ventilation opening, link mechanism both ends are installed on the ventilation opening and successively pass through All shutter boards are worn, being extended on the shutter board to the pneumatic actuator direction has drive rod, the driving Bar is inserted into the pneumatic actuator, wherein the shutter board has first state and the second state, when in first state When, all shutter boards do not block the ventilation opening；When in the second state, all shutter boards jointly seal Block up the ventilation opening.

Technical field

The invention belongs to coke oven heating combustion control technology fields, and in particular to a kind of coke oven heating method for controlling combustion and System.

Background technique

With the rapidly development of coking industry, the reinforcement of Environmental protective awareness, coke oven as an energy consumption rich and influential family, How environmental pollution rich and influential family improves its performance efficiency, and the research for reaching real energy-saving and emission-reduction is concerned by people.

Current coke oven heating intelligent control technology is mainly that heat input side's gas volume is adjusted to main means, to reduce Flue high temperature reduces the discharge of nitrogen oxides, and part of the manufacturer and patent document, which have to mention, utilizes exhaust gas dilution combustion-supporting gas External exhaust gas circulator has positive effect in the discharge of control NOx, but exhausted air quantity will increase coke oven combustion gas volume, It affects to integral pressure in furnace.

For this phenomenon, there are some producers to mention in conjunction with optimization Combustion System and waste gas circulation two-way function advantage, reach To the effect for stablizing burning and reduction nitrogen oxides.But the above technology adjusting is all to adjust gas volume input and divide cigarette Main means of the road suction size as each combustion chambers burn ignore the effect that single combustion air-exhausted air quantity is adjusted, especially When external exhaust gas recycles in injection air system, it is applied alone point flue suction force to adjust institute's combuster and always blends gas flow, be easy The blending gas distribution for each combustion chamber occur is uneven, combustion position is unstable, and air and exhaust gas volumn distribution ratio are improper, and also It is easy to cause air capacity more than needed to assemble in flue, causes local flame temperature excessively high, be both unfavorable for the high Xiang Jiare of carbonizing chamber Whole pressure, which is distributed, uniformly and in furnace stablizes, and is also unfavorable for realizing that environment protection emission control requires, increases later period exhuast gas desulfurization Denitration process cost control.

Summary of the invention

To solve the above problems, the present invention provides: a kind of coke oven heating method for controlling combustion, the method includes steps It is rapid:

S1: according to single tube gas volume, air intake needed for calculating single combustion chamber；

S2: according to air intake needed for single combustion chamber, single accumulation of heat room air air inlet aperture is adjusted；

S3: top suction is stored according to regenerative chamber down current and standard regenerative chamber stores top suction change of error range, corrects the storage Hot cell air air inlet aperture；

S4: according to regenerator bottom bottom flue oxygen content data feedback, air air inlet aperture is adjusted；

S5: according to accumulation of heat room air intake, outer loop exhausted air quantity is adjusted；

S6: according to furnace roof space temperature, outer loop exhausted air quantity is corrected.

The present invention also provides a kind of coke oven heating combustion control system, the system comprises:

Furnace roof space temperature feedback control module judges that charge of coke heating is high to uniform for the raw gas temperature data according to acquisition Property, and the outer loop exhaust gas branch pipe valve opening of respective combustion chamber is adjusted when being lower than given threshold to change exhaust gas blending amount； The furnace roof space temperature feedback control module includes raw gas temperature acquisition module and outer loop exhaust gas branch pipe at tedge Valve, for being acquired to raw gas temperature, the outer loop exhaust gas manifold valve is used for the raw gas temperature acquisition module Itself aperture is adjusted to change exhaust gas blending amount；

Cycle gas-coal gas feedforward control module, for opening empty when branch gas tube valve opening adjusts and is more than given threshold Tolerance-external exhaust gas internal circulating load automatic control flow chart；The cycle gas-coal gas feedforward control module includes single hole gas flow Regulating valve, air air inlet regulating valve and the outer loop exhaust gas manifold valve；The single hole gas flow regulating valve is for adjusting The branch gas tube valve opening is saved, the air air inlet regulating valve is used to adjust to be contained by the air that air air inlet enters Amount, the outer loop exhaust gas manifold valve for adjusting exhaust gas blending amount, follow by the air air inlet regulating valve and the outside Ring exhaust gas manifold valve collectively forms the air capacity-external exhaust gas internal circulating load automatic control flow chart；

Top suction coordinating control module is stored, for storing top suction value and oxygen content data, judgement according to the down current of acquisition Whether exhaust gas disc air air inlet aperture and outer loop exhaust gas branch pipe control valve opening reach target aperture；The storage pushes up suction Coordinating control module includes that down current stores top suction acquisition module, oxygen content data acquisition module, exhaust gas disc air air inlet Regulating valve and outer loop waste gas regulating valve；The down current stores top suction acquisition module and inhales for acquiring down current and storing to push up Force value, the oxygen content data acquisition module is for acquiring regenerator bottom oxygen content data, the exhaust gas disc air air inlet Regulating valve is for adjusting exhaust gas disc air air inlet aperture, and the outer loop waste gas regulating valve is for adjusting outer loop exhaust gas Branch pipe aperture；

Divide flue-storage top suction coordinating control module, for storing top suction value by collected down current and dividing flue Total suction value, judges whether exhaust gas disc air conditioning valve opening and overshoot quantity reach the limit values, and when the limit value is reached, opens It is dynamic that the automatic adjustment of flue suction force baffle is divided to realize the equilibrium assignment for storing top suction again；Described point of flue-storage top suction coordinates control Molding block include down current store top suction acquisition module, divide flue suction force data acquisition module, exhaust gas disc air control valve and Divide flue suction force regulating valve；The down current stores top suction acquisition module and stores top suction value for acquiring down current, described Flue suction force data acquisition module is divided to divide flue suction force value for acquiring, the exhaust gas disc air control valve is opened for adjusting itself Degree, it is described divide flue suction force regulating valve for start divide flue suction force baffle automatic adjustment.

Preferably, the exhaust gas disc air air inlet regulating valve is mounted on air inlet below exhaust gas disc air cover board.

Preferably, the exhaust gas disc air air inlet regulating valve includes the ventilation opening that setting is connect with air inlet bottom, institute It states and is provided with pneumatic actuator on the first lateral surface of ventilation opening, locator is installed outside the pneumatic actuator, it is described pneumatically to hold It is provided with and communicated with pneumatic bigeminy part between row device and the locator, several shutter boards, connecting rod machine are provided in the ventilation opening Structure both ends are installed on the ventilation opening and sequentially pass through all shutter boards, to the pneumatic execution on the shutter board Device direction, which is extended, drive rod, and the drive rod is inserted into the pneumatic actuator, wherein the shutter board has first State and the second state, when in the first state, all shutter boards do not block the ventilation opening；When in the second shape When state, all shutter boards jointly block the ventilation opening.

Compared with prior art means, the present invention is had the advantage that:

(1) the air intake control structure transformation optimized, utmostly reduces and destroys to former coke oven construction, realize burned The automatic adjustment of journey air capacity.

(2) by utilizing gas and thermal load demands variation control air capacity and cycle gas amount, it can be achieved that rationally Empty coal score match, reduce the exhaust gas sensible heat taken away of additional air, gas saving amount.

(3) it is precisely controlled exhaust gas blending amount, blending gas oxygen concentration is reduced, reduces flame high temperature concentration zones, hence it is evident that improve Flue height improves coke quality to heating uniformity.

(4) cycle gas blending is reduced to the single influence for storing top suction fluctuation, is stored top suction uniformity and is obviously improved.

(5) without manual adjustment air and cycle gas aperture, fire tuning labor intensity of workers is substantially reduced, reduces artificial adjust Save bring hysteresis quality and measurement error.

Detailed description of the invention

In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this Some embodiments of invention without any creative labor, may be used also for those of ordinary skill in the art To obtain other drawings based on these drawings.

Fig. 1 is a kind of coke oven heating method for controlling combustion flow chart provided by the invention；

Fig. 2 is a kind of coke oven heating combustion control system composition schematic diagram provided by the invention；

Fig. 3 is one of Fig. 2 coke oven heating combustion control system workflow schematic diagram；

Fig. 4 is using a kind of coke oven heating Combustion System illustraton of model of coke oven heating combustion control system provided by the invention；

Fig. 5 is that air-cycle gas of a kind of coke oven heating method for controlling combustion provided by the invention and system is applied to adjust control Reconstruction structure schematic diagram processed；

Fig. 6 is the exhaust gas disc air air inlet regulating valve structure schematic diagram in Fig. 5；

Fig. 7 is the air capacity adjustment control method in a kind of coke oven heating combustion control system provided by the invention under waste gas circulation Flow diagram；

Fig. 8 be a kind of coke oven heating combustion control system according to the present invention exchange before 30min single tube air-cycle gas amount Adjust model cootrol flow chart；

Fig. 9 be a kind of coke oven heating combustion control system according to the present invention exchange after 30min single tube air-cycle gas amount Adjust model cootrol flow chart.

Specific embodiment

In order to make the objectives, technical solutions and advantages of the present invention clearer, With reference to embodiment and join According to attached drawing, the present invention is described in more detail.It should be understood that these descriptions are merely illustrative, and it is not intended to limit this hair Bright range.In addition, in the following description, descriptions of well-known structures and technologies are omitted, to avoid this is unnecessarily obscured The concept of invention.

Such as Fig. 1, the present invention provides a kind of coke oven heating method for controlling combustion, specifically comprise the following steps:

S1: according to single tube gas volume, air intake needed for calculating single combustion chamber；

S2: according to air intake needed for single combustion chamber, single accumulation of heat room air air inlet aperture is adjusted；

S3: top suction is stored according to regenerative chamber down current and standard regenerative chamber stores top suction change of error range, corrects the storage Hot cell air air inlet aperture；

S4: according to regenerator bottom bottom flue oxygen content data feedback, air air inlet aperture is adjusted；

S5: according to accumulation of heat room air intake, outer loop exhausted air quantity is adjusted；

S6: according to furnace roof space temperature, outer loop exhausted air quantity is corrected.

Such as Fig. 2, the present invention provides a kind of coke oven heating combustion control system, the system comprises:

Furnace roof space temperature feedback control module 100, it is burnt for being judged according to raw gas temperature data above the carbonizing chamber of acquisition Cake heating height adjusts the outer loop exhaust gas branch pipe valve opening of respective combustion chamber to uniformity, and when being lower than given threshold to change Become exhaust gas blending amount；The furnace roof space temperature feedback control module 100 includes raw gas temperature at the tedge of carbonizing chamber top Acquisition module 101 and outer loop exhaust gas manifold valve 102, the raw gas temperature acquisition module 101 are used for above carbonizing chamber Raw gas temperature is acquired, and the outer loop exhaust gas manifold valve 102 is for adjusting itself aperture to change exhaust gas blending amount；

Cycle gas-coal gas feedforward control module 200, for opening when branch gas tube valve opening adjusts and is more than given threshold Open air capacity-external exhaust gas internal circulating load automatic control flow chart；The cycle gas-coal gas feedforward control module 200 includes single hole Gas flow regulating valve 201, air air inlet regulating valve 202 and the outer loop exhaust gas manifold valve 102；The single hole coal gas Flow control valve 201 passes through for adjusting the branch gas tube valve opening, the air air inlet regulating valve 202 for adjusting The air content that air air inlet enters, the outer loop exhaust gas manifold valve 102 is for adjusting exhaust gas blending amount, the air Air inlet regulating valve 202 and the outer loop exhaust gas manifold valve 102 collectively form the air capacity-external exhaust gas internal circulating load certainly Dynamic control flow；

Top suction coordinating control module 300 is stored, for storing top suction value and oxygen content data according to the down current of acquisition, is sentenced Whether disconnected exhaust gas disc air air inlet aperture and outer loop exhaust gas branch pipe control valve opening reach target aperture；It inhales on the storage top Power coordinating control module 300 includes that down current stores top suction acquisition module 301, oxygen content data acquisition module 302, exhaust gas disc Air air inlet regulating valve 303 and outer loop waste gas regulating valve 304；The sending down abnormally ascending stream stores top suction acquisition module 301 and is used for It acquires down current and stores top suction value, the oxygen content data acquisition module 302 is for acquiring oxygen content data, the exhaust gas disc For adjusting exhaust gas disc air air inlet aperture, the outer loop waste gas regulating valve 304 is used for air air inlet regulating valve 303 Adjust itself aperture；

Divide flue-storage top suction coordinating control module 400, for storing top suction value by collected down current and dividing cigarette Road suction total value, judges whether exhaust gas disc air conditioning valve opening and overshoot quantity reach the limit values, when the limit value is reached, Starting divides the automatic adjustment of flue suction force baffle to realize the equilibrium assignment for storing top suction again；Described point of flue-storage top suction is coordinated Control module 400 includes that down current stores top suction acquisition module 401, flue suction force data acquisition module 402, exhaust gas is divided to circle or whirl in the air Gas regulating valve 403 and divide flue suction force regulating valve 404；The down current stores top suction acquisition module 401 for acquiring decline Air-flow store top suction value, it is described divide flue suction force data acquisition module 402 for acquire divide flue suction force value, the exhaust gas circles or whirl in the air Gas regulating valve 403 for adjusting itself aperture, it is described divide flue suction force regulating valve 404 for start divide flue suction force baffle automatic It adjusts.

It is illustrated below with reference to the system of Fig. 3, the method for 4 and 7 couples of above-mentioned Fig. 1 and Fig. 2.

When single hole gas flow, which is adjusted, is more than certain value more than certain threshold value or the variation of exhaust gas cycle amount, need to start sky Tolerance is adjusted, and to ensure the stabilization of single hole combustion chamber excess air coefficient, guarantees that burning is not wasted with fuel sufficiently.Because considering cigarette Gas small front apron, which changes auto-adjustment control precision, can adjust source air from air capacity compared with current Manual structure controls The automatic control of entrance aperture is set about, and stores top suction means as controlling to adjust, stores pressure on top surface by comparing combustion chamber down current Regulated quantity is determined with the relationship of air inlet air capacity, in adjustment process, to control the hole regenerative chamber and adjacent regenerative chamber It stores top suction and standard stores on the basis of pushing up suction within the scope of normal deviate, it is ensured that store the whole machine balancing of top suction.

When each air register aperture reaches setting maximum value, air air inlet oversteps the extreme limit to the adjusting for storing top suction Value, should switch to a point flue suction force and adjust.It is controlled by air inlet baffle opening and stores top suction adjusting air capacity scheme, can reduced In flue gas small front apron transformation process because cost of manufacture caused by requirement on machining accuracy is excessive and adjustment process in be easy to cause gear The puckery phenomenon of board, while comparing ascending air and down current pressure difference prediction air capacity size by calculating, it can be improved heated The precise controlling of exhaust gas dilution combustion-supporting gas amount in journey reduces foundation merely and divides the big minor adjustment total air of flue suction force to list The negative effect of a combustion chamber gases maldistribution, so that coke oven combustion system be made to be chronically at a kind of moderately good add Warm status reduces coking heat consumption, reduces discharged nitrous oxides, improves coke quality, extends the coking furnace shaft service life.

As shown in fig. 7, the method for Fig. 1 and the system of Fig. 2 mainly include the following steps:

1, single hole coal gas-cycle gas-air mass flow intelligent control:

(1) the air capacity feed-forward regulation based on combustion control theory

According to combustion control theoretical basis, using the best excess air coefficient of single hole as target, change in single hole gas flow Or the variation of external exhaust gas internal circulating load adjusts single hole air mass flow and cycle gas amount, it is ensured that suitable sky coal when being more than threshold value Than guaranteeing burning adequacy and temperature stability.

(2) the single hole air capacity feedback regulation based on furnace roof space temperature

Furnace roof space temperature acquires raw gas temperature by tedge at the top of carbonizing chamber, adjusts as single hole air capacity real-time anti- Feedback, during coke oven heating control, ascending tube crude-gas temperature is also used as the judgment basis of coking state coking end time point, this Hard measurement data of the raw gas temperature as furnace roof space temperature in scheme, judge carbonizing chamber height to heating effect.

(3) the single hole air capacity feedback regulation based on coking end time

According to single hole coking end time situation, gas volume changes in flow rate is adjusted, when reducing the gas volume consumption in the stewing furnace time, is The heat dissipation capacity that additional air amount is taken away is reduced, combustion-supporting gas should be adjusted in time.Sky is adjusted in time by adjusting exhausted air quantity, air capacity Coal ratio, it is ensured that oxygen content needed for gas-fired keeps furnace temperature, reduces the sensible heat that extra exhaust gas is taken away.When single carbonizing chamber is in When coking latter stage (after fire drop point), in conjunction with the standard flue temperature of both sides combustion chamber and the coking state of adjacent SiC room, according to It is controlled according to single tube gas flow and requisite oxygen content of burning calculates control algolithm, adjustment associated combustion chamber air inlet air and circulation In the case that exhaust gas flow, i.e. guarantee adjacent SiC room coking are unaffected, realize the most preferably empty coal proportion in single combustion chamber, stablize Ignition temperature, while saving gas flow and reducing nitrogen oxides.

2, the storage top suction coordinated control based on pressure balance system

When certain number carbonizing chamber fire falls behind, the combustion chamber gas flow adjustment at the carbonizing chamber both ends, corresponding air intake reduces, The adjusting of air air inlet baffle opening and cycle gas amount size will involve the variation of adjacent regenerator top suction, because Target regenerator suction should be adjusted and be combined with the adjusting of adjacent regenerator suction by this.Guarantee each regenerator top suction value with Standard stores top suction deviation and is in normal range (NR), and flame-observing hole pressure is slight positive pressure state.

3, it stores top suction-and divides flue suction force coordinated control

Based on full furnace pressure dynamic balance system, aperture is initialized according to flue small front apron and stores top suction, air inlet open degree feedback Situation stores top suction and the adjacent comprehensive adjustment mode for storing top suction of control by adjusting target, avoids each regenerator top Regulation caused by suction influences each other frequently is not easy stable situation, it is ensured that each top suction that stores adjusts surplus, keeps whole storage Suction is balanced at the top of hot cell.

Top suction is stored to adjust and divide the total suction of flue that can influence each other, when damper aperture reaches maximum value, air Amount adjustment reaches capacity, and needs a point flue suction force coordinated control, while meeting single hole air capacity regulatory demand, keeps storing top Suction whole machine balancing.

Please refering to Fig. 5-6, in the embodiment of the present application, the exhaust gas disc air air inlet regulating valve 303 is mounted on useless Gas circles or whirl in the air air inlet below air cover board.The exhaust gas disc air air inlet regulating valve 303 includes connecting to set with air inlet bottom The ventilation opening 3030 set is provided with pneumatic actuator 3031, the pneumatic actuator on 3,030 first lateral surface of ventilation opening Outer 3031 are equipped with locator 3033, are provided with and communicated with pneumatic two between the pneumatic actuator 3031 and the locator 3033 Join part 3032, several shutter boards 30300 are provided in the ventilation opening 3030,30301 both ends of link mechanism are installed on described logical On air port 3030 and all shutter boards 30300 are sequentially passed through, to the pneumatic actuator on the shutter board 30300 3031 directions, which are extended, drive rod 30302, and the drive rod 30302 is inserted into the pneumatic actuator 3031, wherein institute Shutter board 30300 is stated with first state and the second state, when in the first state, all shutter boards 30300 are not Block the ventilation opening；When in the second state, all shutter boards 30300 jointly block the ventilation opening.

The above method and system are further detailed with embodiment below.