阅读说明：本技术 一种转炉三次除尘气楼和屋顶气楼优化改造控制方法 (Converter triple dust removal clerestory and roof clerestory optimization transformation control method ) 是由 刁望才 梁志刚 麻晓光 李炯伟 渠毓柱 李维虎 李震 陈海波 田野 刘铭 张怀军 于 2020-04-16 设计创作，主要内容包括：本发明公开了一种转炉三次除尘气楼和屋顶气楼优化改造控制方法,包括：S1、将高跨的通风气楼使用带铁丝网的滤布进行封闭,同时增加轴流风机进行强制通风；S2、封闭三次除尘气楼,将三次除尘气楼使用滤布进行封闭,并将三次除尘管道与集烟罩周围孔洞封堵,并将集烟罩内部封堵严。本发明能够实现通风效果又能达到环保要求,解决由于三次除尘气楼和屋顶气楼直通大气带来的一系列环保问题。(The invention discloses a converter triple dedusting clerestory and roof clerestory optimization reconstruction control method, which comprises the following steps: s1, sealing the high-span ventilation clerestory by using filter cloth with an iron wire mesh, and adding an axial flow fan for forced ventilation; and S2, sealing the tertiary dust removal clerestory by using filter cloth, plugging the tertiary dust removal pipeline and holes around the smoke collection hood, and plugging the interior of the smoke collection hood tightly. The invention can realize ventilation effect and meet the requirement of environmental protection, and solves a series of environmental protection problems caused by the direct connection of the third dust removal clerestory and the roof clerestory to the atmosphere.)

1. A converter triple dedusting clerestory and roof clerestory optimization transformation control method is characterized by comprising the following steps:

s1, sealing the high-span ventilation clerestory by using filter cloth with an iron wire mesh, and adding an axial flow fan for forced ventilation;

and S2, sealing the tertiary dust removal clerestory by using filter cloth, plugging the tertiary dust removal pipeline and holes around the smoke collection hood, and plugging the interior of the smoke collection hood tightly.

2. The method for controlling the optimized reconstruction of the converter triple de-dusting clerestory and the roof clerestory as claimed in claim 1, wherein the axial flow fan is connected to a converter PLC system in a control manner.

3. The optimized transformation control method for the converter triple dedusting clerestory and the roof clerestory according to claim 1, characterized by further comprising the step of changing an electric cutoff valve of a triple dedusting pipeline into a pneumatic cutoff valve, so that the cutoff valve of the triple dedusting pipeline of each converter can be independently and rapidly switched, and the concentrated suction effect is achieved.

4. The method for controlling the optimization and reconstruction of the converter triple dedusting clerestory and the roof clerestory as recited in claim 1, wherein in the production process, the converter which is blowing opens the triple dedusting valve, and the converter which is not blowing closes the triple dedusting valve.

5. The method for controlling the optimized reconstruction of a converter triple de-dusting clerestory and a roof clerestory as claimed in claim 1, wherein the filter cloth with the resistance of 200Pa and the resistance of 550 g/m is adopted²And two layers of wire netting are used for clamping the filter cloth, so that the strength is increased.

6. The optimization, reconstruction and control method for the converter triple dedusting clerestory and the roof clerestory according to the claim 1 or 5 is characterized in that a frame-divided movable plugging mode is adopted, so that the follow-up maintenance is convenient.

7. The method for controlling the optimized reconstruction of the triple dedusting clerestory and the roof clerestory of the converter according to claim 1, wherein 4 axial fans with the volume of 20800m and the flow rate of 3Kw are additionally arranged on each clerestory³/h。

Technical Field

The invention relates to the technical field of ferrous metallurgy dust removal, in particular to a converter tertiary dust removal clerestory and roof clerestory optimization transformation control method.

Background

In order to ensure the air flow in the converter plant and the replacement with the air outside the plant, the conventional converter plant design has a tertiary dedusting clerestory and a high-span roof ventilation clerestory. The clerestory ventilation principle is that outside air flows and makes clerestory hole department produce the negative pressure to air outwards flows in making the factory building naturally, reaches the ventilation cooling effect that air and atmosphere produced automatic replacement in the factory building. In addition, the appearance of the clerestory is rain-proof, so that the ventilation effect is ensured, and rain leakage into the factory building is prevented.

The converter blowing process inevitably produces splash, produces a large amount of dust-laden flue gas after the splash, directly overflows from positions such as factory building high-span ventilation dormer, tertiary dust removal dormer and hole, shows that there is red (black) cigarette to emerge at the factory building top, and environmental protection is not up to standard when examining seriously at present, influences converter steelmaking process normal production, can lead to stopping production when serious.

The design of the high-span clerestory and the tertiary dedusting clerestory of the original converter factory building only considers the ventilation effect and does not consider the environmental protection requirement, and the requirement of the converter steelmaking green and environmental protection production cannot be met. The environmental protection inspection is unqualified, the examination is serious, and even the normal production organization of converter steelmaking is influenced. Therefore, if the converter factory building high-span clerestory and the tertiary dedusting clerestory can realize the ventilation effect and meet the environmental protection requirement, the method has great practical significance for converter steelmaking production.

Disclosure of Invention

The invention aims to provide an optimized transformation control method for a converter triple dedusting clerestory and a roof clerestory, which can realize ventilation effect, meet environmental protection requirements and solve a series of environmental protection problems caused by direct connection of the triple dedusting clerestory and the roof clerestory to the atmosphere.

In order to solve the technical problems, the invention adopts the following technical scheme:

a converter triple dedusting clerestory and roof clerestory optimization transformation control method comprises the following steps:

s1, sealing the high-span ventilation clerestory by using filter cloth with an iron wire mesh, and adding an axial flow fan for forced ventilation;

and S2, sealing the tertiary dust removal clerestory by using filter cloth, plugging the tertiary dust removal pipeline and holes around the smoke collection hood, and plugging the interior of the smoke collection hood tightly.

Further, the axial flow fan is connected to the converter PLC system in a control mode.

Furthermore, still include to change cubic dust removal pipeline electronic trip valve into pneumatic trip valve, realize the quick switch over alone of every converter cubic dust removal pipeline trip valve, reach concentrated suction effect.

Further, in the production process, the converter in blowing opens the tertiary dust removal valve, and the converter not in blowing closes the tertiary dust removal valve.

Further, the resistance is adopted in200Pa filter cloth, 550 g/m²And two layers of wire netting are used for clamping the filter cloth, so that the strength is increased.

Furthermore, a frame-divided movable plugging mode is adopted, so that subsequent maintenance is facilitated.

Furthermore, 4 axial flow fans of 3Kw are additionally arranged in each ventilating clerestory, and the flow rate is 20800m 3/h.

Compared with the prior art, the invention has the beneficial technical effects that:

the invention can realize the ventilation effect of the converter factory high-span clerestory and the tertiary dedusting clerestory, can effectively control the smoke emission phenomenon of the factory building roof, meets the environmental protection requirement, has convenient operation and flexible control, and ensures the smooth operation of the converter production.

Drawings

The invention is further illustrated in the following description with reference to the drawings.

FIG. 1 is an original drawing of a sectional view of a rooftop clerestory

FIG. 2 is a sectional view of a roof clerestory

FIG. 3 is a plan view of a roof clerestory opening seal;

description of reference numerals: 1. a plant roof; 2. a clerestory side hole; 3. the clerestory is provided with a hole which is directly communicated with the atmosphere; 4. the top of the clerestory; 5. exchanging air flow inside and outside; 6. an axial flow fan; 7. and (5) filtering the cloth.

Detailed Description

A converter triple dedusting clerestory and roof clerestory optimization reconstruction control method refers to the following figures 1 to 3:

S1：

5 ventilation dorms of the high span of the converter are sealed, and ventilation channels of the 5 ventilation dorms of the high span are sealed in a mode of adopting two layers of wire nets and adding filter cloth in the middle. 4 additional 3Kw (flow of 20800 m) are added for each ventilating clerestory³H) 20 axial fans, which are connected to the PLC system of the converter in a control mode, have local and remote operation functions and realize independent control (on/off) on a main screen button of the converter.

A filter cloth with the resistance of about 200Pa (550 g/m) is adopted²) Two layers of wire netting are used for clamping the filter cloth, so that the strength is increased. By using split frameAnd the movable plugging mode is convenient for subsequent maintenance.

The operation requirement is that 20 axial fans have a remote operation function, and the outer part of each axial fan is provided with a wind shield. The fan baffle can be started to perform forced ventilation in daily operation, the fan baffle is stopped to be automatically closed when splashing occurs, dust-containing smoke is restrained in a high span, forced ventilation is performed after the smoke falls, and the exhaust and ventilation effects of a workshop can be realized.

And (3) accounting of the ventilation quantity of the clerestory:

the length of the ventilation clerestory is 20m, the width is 4.5m, the air flow velocity is about 0.3m/s, and the ventilation volume of 5 ventilation clerestory is calculated as follows:

Q＝20*4.5*5*0.3*3600＝486000m³/h

the amount of forced ventilation is calculated as follows:

Q1＝5*4*20800＝416000m³/h

the forced ventilation flow is equivalent to the natural ventilation flow, and meanwhile, the filter cloth is also subjected to natural ventilation, and the combination of the forced ventilation flow and the natural ventilation can ensure the ventilation requirement of the high span of the converter.

S2：

And (3) sealing the tertiary dedusting clerestory, sealing the 3 tertiary dedusting clerestory by using filter cloth, plugging the tertiary dedusting pipeline and holes around the smoke collecting hood, and tightly plugging the interior of the smoke collecting hood.

The electric cut-off valve of the three-time dust removal pipeline is changed into a pneumatic cut-off valve, so that the independent quick switching of the three-time dust removal pipeline cut-off valve of each converter is realized, and the concentrated suction effect is achieved. In the production process, the converter in blowing opens the tertiary dust removal valve, and the converter not in blowing closes the tertiary dust removal valve, so that the air suction volume of the converter in blowing state for tertiary dust removal is greatly improved, meanwhile, the power consumption for tertiary dust removal can be effectively reduced, the operation cost is saved, the dust removal capacity for tertiary dust removal is effectively improved, and a higher environment-friendly effect is achieved.

The above-described embodiments are merely illustrative of the preferred embodiments of the present invention, and do not limit the scope of the present invention, and various modifications and improvements of the technical solutions of the present invention can be made by those skilled in the art without departing from the spirit of the present invention, and the technical solutions of the present invention are within the scope of the present invention defined by the claims.