CN107051181A - A kind of corrugated sheet and its airflow distribution device for wet desulfuration tower - Google Patents

Abstract

The invention relates to a corrugated plate used in a wet desulfurization tower and an air flow distribution device formed thereof, which comprises a plurality of corrugated plate modules and support beams arranged in a horizontal arrangement, and the corrugated plate module is composed of a plurality of parallel valley plates and The peak plate and the side wall plate with an inclination angle connecting the valley plate and the peak plate are integrally formed. Several circular through holes are evenly distributed on the valley plate, side wall plate and peak plate, and the corrugated plate modules are connected by bolts. Fixed on the supporting beam; the present invention can realize the effective rectification of the flue gas. After the flue gas passes through the airflow distribution device, it passes the optimal parameter value. Due to the inclined arrangement of the side wall plates, the airflow interferes with each other, reducing the flue gas flow rate. The flue gas in the tower is evenly distributed, and the falling slurry droplets form a liquid film on the surface of the corrugated plate, which prolongs the slurry residence time, strengthens the mass transfer between the gas-liquid two phases, improves the desulfurization efficiency, and improves the flue gas synergistic dust removal effect; by setting the bolt and Support beam, simple structure, easy installation, disassembly and maintenance.

Description

A corrugated plate for wet desulfurization tower and its airflow distribution device

technical field

The invention relates to the field of auxiliary equipment of a flue gas desulfurization device, in particular to a corrugated plate used in a wet desulfurization tower and an air flow distribution device thereof.

Background technique

The flue gas emitted by coal-fired power plants contains a large amount of sulfur dioxide. If it is discharged directly without treatment, it will cause great harm to the environment and economic development. With the increasingly stringent environmental protection standards, power companies have stepped up efforts to control sulfur dioxide. Limestone-gypsum wet flue gas desulfurization technology is currently the most widely used and most mature desulfurization process, and the absorption tower is the core equipment of this process. The boiler flue gas enters the tower through the flue at the entrance of the absorption tower. The flue gas rises and contacts the gypsum slurry sprayed down from the upper part in the absorption zone. The sulfur dioxide is washed and removed by neutralization reaction. At the same time, the The fine dust is captured by the liquid droplets, and the flue gas is purified. However, after the flue gas enters the absorption tower body, the volume will expand rapidly and the speed will slow down. Affected by the absorption tower wall, a part of the flue gas flows upward along the opposite side of the absorption tower entrance, while the other part of the flue gas moves downward and flows at the bottom of the absorption tower. A counterclockwise vortex is formed near the pool, resulting in a strong turbulent flow area, resulting in extremely uneven distribution of flue gas in the tower, affecting the mass transfer effect between the gas-liquid two phases, reducing the desulfurization efficiency and the synergistic dust removal efficiency of the absorption tower.

Based on this, it is necessary to design a gas flow distribution device that can make the flue gas distribution in the tower uniform, thereby improving the desulfurization efficiency and dust removal efficiency.

Contents of the invention

The object of the present invention is to overcome the deficiencies of the prior art, and obtain a corrugated plate for a wet desulfurization tower and an air flow distribution device thereof.

The present invention is realized through the following technical solutions:

A corrugated plate used in a wet desulfurization tower, comprising a corrugated plate module, the corrugated plate module is composed of a plurality of valley plates and peak plates parallel to each other and side wall plates with inclined angles connecting the valley plates and peak plates Forming, the valley plate, the side wall plate, and the peak plate are uniformly provided with a number of circular through holes.

Preferably, the ratio of the width of the peak plate and the valley plate to the width of the side wall plate is 1/3-2/3, the vertical distance between the peak plate and the valley plate is 50-120mm, and the thickness of the valley plate is The thickness of the side wall plate is 2-5mm, the opening rate is 30%-60%, the through-hole diameter is 30-60mm, the thickness of the side wall plate is 2-5mm, the opening rate is 30%-60%, and the through-hole diameter is 30-60mm. 50mm, the angle between the side wall plate and the peak plate is 30°～70°, the thickness of the peak plate is 2～5mm, the opening rate is 30%～60%, the diameter of the through hole is 30～60mm, the number of peak plate The number is 1 to 5, and the efficiency is improved through the optimal parameter ratio.

Preferably, the angle between the side wall plate and the peak plate is 30° to 60°, which increases the specific surface area, makes the falling slurry droplets form a liquid film on the surface of the corrugated plate, prolongs the residence time of the slurry, and makes the gas phase and liquid The full contact between the gas and liquid phases strengthens the mass transfer between the gas and liquid phases, effectively collides and adsorbs dust or solid particles, and increases the chance of capturing impurities such as dust. The smoke distribution in the tower is uniform.

Preferably, the thickness of the valley plate is 2-4mm, the opening rate is 30%-50%, and the through-hole diameter is 30-50mm. The optimal thickness value and pore diameter can prevent the blockage of the channel, and the optimal opening The rate can reduce the channel resistance, reduce the pressure, and prolong the time for the airflow to interfere with each other.

Preferably, the thickness of the side wall plate is 2-4mm, the opening ratio is 30%-50%, the diameter of the through hole is 30-40mm, and the diameter of the through hole of the side wall plate is slightly smaller than the diameter of the through hole of the valley plate and the peak plate , resulting in a channel residence time difference, giving the fluid sufficient time to interfere with each other in the channel between the side wall plates, the optimal thickness value and pore diameter can prevent the channel from being blocked, and the optimal opening ratio can reduce the channel resistance , the pressure drops, prolonging the time for the airflow to interfere with each other.

As a preference, the thickness of the peak plate is 2-4mm, the opening rate is 30%-50%, and the diameter of the through hole is 30-50mm. The optimal thickness value and pore diameter can prevent the blockage of the channel, and the optimal opening The rate can reduce the channel resistance, reduce the pressure, and prolong the time for the airflow to interfere with each other.

Preferably, the ratio of the width of the peak plate and the valley plate to the width of the side wall plate is 1/3 to 1/2, the smaller the width ratio, the stronger the ability of gas-liquid contact and mass transfer, and the mutual interference performance of the upper and lower airflows Strong, but if the width ratio is too small, it will also increase the liquid phase resistance and reduce the dust removal efficiency. The optimal width ratio can make the smoke distribution uniform and improve the dust removal efficiency.

Preferably, the vertical distance between the peak plate and the valley plate is 50-100 mm, and the optimal vertical distance can make the smoke evenly distributed and enhance the mass transfer between the gas-liquid two phases.

In order to achieve the above purpose, the air distribution device includes several corrugated plate modules and support beams arranged in a horizontal arrangement, the corrugated plate modules are fixed on the support beams through bolt connections, and the upper side of the corrugated plate modules is adjacent to the two side walls A first one-way flow channel is formed between the plates, and a second one-way flow channel is formed between the adjacent two-side wall plates on the lower side of the corrugated plate module corresponding to the upper side, and the first flow channel is connected to the second flow channel. The channels interact to form a two-way flow channel, and the gas between the two-way flow channels interferes with each other, which reduces the flow rate of the flue gas and makes the flue gas distribution in the tower even.

Preferably, the corrugated plate module is made of corrosion-resistant alloy, the support beam and bolts are made of corrosion-resistant alloy or carbon steel, and the surface of the corrugated plate module, support beam and bolt is provided with an anti-corrosion layer to prevent being The flue gas corrodes, making the device invalid and affecting the use of the device.

Compared with the existing technology, the beneficial effect of the present invention is: the present invention can realize the effective rectification of the flue gas. After the flue gas passes through the air distribution device, it passes through the optimal parameter value. Due to the inclined arrangement of the side wall plates, the air flow Mutual interference reduces the flue gas flow rate and makes the flue gas distribution in the tower even. At the same time, the falling slurry droplets form a liquid film on the surface of the corrugated plate, prolonging the slurry residence time and strengthening the mass transfer between the gas and liquid phases, thereby improving the desulfurization efficiency. , and to a certain extent improve the flue gas synergistic dust removal effect; by setting bolts and support beams, the structure is simple, the installation, disassembly and maintenance are convenient, and it has significant advantages.

Description of drawings

Fig. 1 is the front view of the structural longitudinal section of the air flow distribution device of the desulfurization spray tower in the present invention;

Fig. 2 is a schematic structural diagram of a corrugated plate module in the present invention.

detailed description

In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

As a preferred embodiment of the present invention:

Please refer to Fig. 1 and Fig. 2, a kind of corrugated plate that is used in wet desulfurization tower, comprises a corrugated plate module, and described corrugated plate module is made up of a plurality of mutually parallel valley plate 6 and peak plate 4 and connects valley plate 6 and The side wall plate 5 with an inclination angle of the peak plate 4 is integrally formed, the ratio of the width of the peak plate 4 and the valley plate 6 to the width of the side wall plate 5 is 1/3 to 2/3, and the peak plate 4 and the valley plate The vertical distance between the plates 6 is 50-120 mm, and several circular through holes are evenly distributed on the valley plate 6, the side wall plate 5, and the peak plate 4, the thickness of the valley plate 6 is 2-5 mm, and the openings are The ratio is 30%-60%, the diameter of the through hole is 30-60mm, the thickness of the side wall plate 5 is 2-5mm, the opening rate is 30%-60%, the diameter of the through hole is 30-50mm, the side wall plate 5 The angle with the peak plate 4 is 30°-70°, the thickness of the peak plate 4 is 2-5mm, the opening rate is 30%-60%, the diameter of the through hole is 30-60mm, and the number of peak plate 4 is 1 ~7.

When optimizing the design, the optimal parameter ratio is that the thickness of the valley plate 6 is 2-4mm, the opening rate is 30%-50%, the diameter of the through hole is 30-50mm, the thickness of the side wall plate 5 is 2-4mm, and the opening rate is 30%-50%, the diameter of the through hole is 30-40mm, the angle between the side wall plate 5 and the peak plate 4 is 30°-60°, the thickness of the peak plate 4 is 2-4mm, and the opening ratio is 30%-50 %, the diameter of the through hole is 30-50 mm, the number of peak plates 4 in the corrugated plate module 1 is 1-5, and the ratio of the width of the peak plate 4 and the valley plate 6 to the width of the side wall plate 5 is 1/3-1/ 2. The vertical distance between the peak plate 4 and the valley plate 6 is 50-100mm. The appropriate inclination angle of the side wall plate 5 increases the specific surface area, makes the falling slurry droplets form a liquid film on the surface of the corrugated plate, prolongs the slurry residence time, makes the gas phase and the liquid phase fully contact, and strengthens the mass transfer between the gas and liquid phases , to effectively collide and adsorb dust or solid particles, increase the chance of capturing impurities such as dust, and at the same time ensure that the airflow on the upper and lower sides interfere with each other, reduce the flow rate of the flue gas, and make the flue gas distribution in the tower even. The diameter of the through hole of the side wall plate 5 is slightly smaller than the diameter of the through hole of the valley plate 6 and the peak plate 4, resulting in a channel residence time difference, giving the fluid sufficient time to interfere with each other in the channel between the side wall plates 5, the optimal thickness The value and pore diameter can prevent the blockage of the channel, and the optimal opening ratio can reduce the channel resistance, reduce the pressure, and prolong the time for the airflow to interfere with each other. The smaller the width ratio, the stronger the ability of gas-liquid contact and mass transfer, and the stronger the interference between the upper and lower airflows. However, if the width ratio is too small, it will also increase the liquid phase resistance and reduce the dust removal efficiency. The optimal width ratio can make The flue gas is distributed evenly and the dust removal efficiency is improved at the same time. The optimal vertical distance can make the flue gas evenly distributed and strengthen the mass transfer between the gas-liquid two phases. In the present embodiment, the valley plate 6 has a thickness of 3mm, an opening rate of 40%, a through hole diameter of 35mm, a side wall plate 5 thickness of 3mm, an opening rate of 40%, a through hole diameter of 35mm, and a side wall plate 5 The angle with the peak plate 4 is 45°, the thickness of the peak plate 4 is 3mm, the opening ratio is 40%, the diameter of the through hole is 35mm, the number of peak plates 4 in the corrugated plate module 1 is 3, the peak plate 4 and The ratio of the width of the valley plate 6 to the width of the side wall plate 5 is 1/2, and the vertical distance between the peak plate 4 and the valley plate 6 is 65mm.

In order to achieve the above purpose, the air distribution device includes several corrugated plate modules 1 and support beams 2 arranged in a horizontal arrangement, the corrugated plate modules 1 are connected and fixed on the support beams 2 by bolts 3, and the corrugated plate modules 1 are A first one-way flow channel is formed between adjacent two-side wall plates 5, and a second one-way flow channel is formed between adjacent two-side wall plates 5 on the lower side of the corrugated plate module 1 corresponding to the upper side, The first flow channel and the second flow channel interact to form a two-way flow channel, and the gases in the two-way flow channels interfere with each other, reducing the flow rate of the flue gas and making the flue gas distribution in the tower even. The corrugated plate module 1 is made of corrosion-resistant alloy, the support beam 2 and bolt 3 are made of corrosion-resistant alloy or carbon steel, and the surface of the corrugated plate module 1, support beam 2 and bolt 3 is provided with an anti-corrosion layer , to prevent corrosion by flue gas, make the device invalid, and affect the use of the device.

The device is installed between the flue gas inlet of the absorption tower and the bottom spray layer. The contour of the corrugated plate module 1 connected to the absorption tower wall needs to be cut to fit the absorption tower wall. After the flue gas enters the absorption tower, the volume expands rapidly. The speed slows down, part of the flue gas flows upward, and the other part of the flue gas moves downward. When passing through the device, the flue gas passes through the air distribution device, and the air flow interferes with each other through the optimal parameter value and the inclined arrangement of the side wall plate 5 , to achieve uniform distribution of flue gas in the tower, thereby improving desulfurization efficiency and dust removal efficiency.

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the present invention. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present invention should be included in the protection of the present invention. within range.

Claims (10)

1. a kind of corrugated sheet for wet desulfuration tower, it is characterised in that including a waveform plate module, the waveform plate module It is integrally formed by the sidewall paneling with angle of inclination of a plurality of paddy plates being parallel to each other and carina and connection paddy plate and carina, institute State paddy plate, sidewall paneling, be uniformly arranged some manholes on carina.

2. a kind of corrugated sheet for wet desulfuration tower according to claim 1, it is characterised in that：The carina and paddy plate The ratio of width and sidewall paneling width be 1/3~2/3, the vertical range between the carina and paddy plate is 50~120mm, institute Paddy plate thickness is stated for 2~5mm, percent opening is 30%~60%, through-hole diameter is 30~60mm, the sidewall sheet thickness is 2~ 5mm, percent opening is 30%~60%, and through-hole diameter is 30~50mm, and the angle between sidewall paneling and carina is 30 °~70 °, institute Carina thickness is stated for 2~5mm, percent opening is 30%~60%, through-hole diameter is 30~60mm, carina quantity is 1~5.

3. a kind of corrugated sheet for wet desulfuration tower according to claim 1, it is characterised in that：The sidewall paneling and peak Angle between plate is 30 °~60 °.

4. a kind of corrugated sheet for wet desulfuration tower according to claim 1, it is characterised in that：The paddy plate thickness is 2~4mm, percent opening is 30%~50%, and through-hole diameter is 30~50mm.

5. a kind of corrugated sheet for wet desulfuration tower according to claim 1, it is characterised in that：The sidewall sheet thickness For 2~4mm, percent opening is 30%~50%, and through-hole diameter is 30~40mm.

6. a kind of corrugated sheet for wet desulfuration tower according to claim 1, it is characterised in that：The carina thickness is 2~4mm, percent opening is 30%~50%, and through-hole diameter is 30~50mm.

7. a kind of corrugated sheet for wet desulfuration tower according to claim 1, it is characterised in that：The carina and paddy plate The ratio of width and sidewall paneling width be 1/3~1/2.

8. a kind of corrugated sheet for wet desulfuration tower according to claim 1, it is characterised in that：The carina and paddy plate Between vertical range be 50~100mm.

9. the airflow distribution device that the corrugated sheet described in a kind of utilization claim 1 is constituted, it is characterised in that the air flow method Device includes some waveform plate modules and support beam in horizontally arranged arrangement, and the waveform plate module is bolted fixation In support beam, the first unidirectional runner, the waveform plate module are formed on the upside of the waveform plate module between adjacent two side wall panels The second unidirectional runner is formed between the adjacent two side wall panels corresponding with upside of downside, the first flow and second flow channel are mutual Phase separation forms reversible passage.

10. a kind of airflow distribution device according to claim 9, it is characterised in that：The waveform plate module is by corrosion-resistant Alloy is made, and the support beam and bolt are made up of corrosion resisting alloy or carbon steel, the waveform plate module, support beam and bolt Surface is provided with anticorrosive coat.