CN209423269U - A tail flue gas elimination tower of wet desulfurization - Google Patents

Abstract

The utility model relates to a white removal tower for flue gas at the tail of wet desulfurization. The white removal tower includes a tower body, a drain outlet, an inlet flue, a uniform flow device, a condensation section, a fan, a defogging section, an inner cylinder and a top outlet , the bottom of the tower body is coaxially connected to set a water outlet, the top of the tower body is coaxially connected to set a top outlet, and the tower body above the water outlet is coaxially spaced with a flow uniform device, above the flow uniform device Condensation section is coaxially arranged on the tower body at intervals, and the outer side of the lower bottom surface of the condensation section is closely connected with the inner wall of the tower body through a sealing plate, and the inner cylinder is coaxially arranged in the tower body between the condensation section and the top outlet . This whitening tower can reduce the water content and flue gas temperature in the flue gas after desulfurization by dehumidification method, so that the flue gas discharged into the atmosphere no longer has white plumes that can be recognized by the naked eye, which greatly reduces the investment and cost of the whitening system. Operation and maintenance have improved efficiency and achieved the goal of energy saving and emission reduction.

Description

A tail flue gas elimination tower of wet desulfurization

technical field

The utility model belongs to the technical fields of chemical industry and environmental protection, in particular to a flue gas elimination tower at the tail of wet desulfurization.

Background technique

The flue gas discharged after wet desulfurization carries a large amount of water vapor, and the wet flue gas enters the ambient atmosphere with a lower temperature, causing a large amount of waste of water resources, and the phenomenon of "white smoke" will also be formed, resulting in visual pollution and bringing Huge pressure from public opinion. At present, more than 85% of domestic coal-fired power plants and steel sintering adopt wet desulfurization process, and the temperature of the discharged wet flue gas is between 45°C and 55°C, and the moisture content is close to saturation.

The widely used wet flue gas whitening technology is flue gas cooling and reheating whitening technology. This technology is mainly composed of three-stage heat exchangers. The first group of heat exchangers will cool the flue gas before entering the main induced draft fan. Usually, the heat exchanger made of 2005 alloy is used to make the flue gas change from the original 120°C to 150°C. The temperature between ℃ is reduced to the range of 80℃～90℃. After the main induced draft fan, the second group of heat exchangers conducts a cooling down to reduce the flue gas temperature to 60°C. After the desulfurization tower, the third group of heat exchangers raises the flue gas temperature from 40°C to 65°C to achieve heat balance. Therefore, the working environment is below the flue gas dew point temperature, and a small amount of SO ₃ acid gas will condense. Fluorine It is made of plastic or nickel-chromium alloy. To ensure the stable operation of the whole system, a small cooling tower is required to adjust the thermal balance of the system. The entire system has the characteristics of large amount of reconstruction work, high investment, high operating costs and many fault points during operation.

Through searching, no patent publication related to the utility model patent application has been found yet.

Contents of the invention

The purpose of this utility model is to overcome the shortcomings of the existing whitening technology, and provide a wet desulfurization tail flue gas whitening tower, which can reduce the water content and flue gas temperature in the flue gas after dehumidification desulfurization , so that the flue gas discharged into the atmosphere no longer has a white plume that can be recognized by the naked eye, which greatly reduces the investment and operation and maintenance of the whitening system, improves efficiency, and achieves the purpose of energy saving and emission reduction.

The utility model solves its technical problem and realizes by taking the following technical solutions:

A wet desulfurization tail flue gas whitening tower, the whitening tower includes a tower body, an inlet flue, a condensation section, an inner cylinder and a top outlet, the top of the tower body is coaxially connected with a top outlet, the tower The lower part of the body is connected with an inlet flue, and the tower body above the inlet flue is coaxially provided with a condensation section;

The inner cylinder is coaxially arranged in the tower body between the condensation section and the top outlet, the top of the inner cylinder is arranged below the top outlet, and an air flow chamber is arranged between the inner cylinder and the inside of the tower body, and the air flow chamber is connected to the inside of the tower body. The output end of the condensing section and the tower above the inner cylinder are connected and arranged, and the outer side of the upper surface of the condensing section is coaxially tightly connected to the bottom of the inner cylinder;

The outer side of the lower bottom surface of the condensing section is closely connected with the inner wall of the tower body through a sealing plate, the input end of the condensing section can input air, the medium of the condensing section is air, and the output end of the condensing section flows with the air. The cavities are connected, and the heat-exchanged air can enter the air flow cavity and finally merge with the treated flue gas output from the outlet of the inner cylinder at the top of the tower above the inner cylinder, and be discharged from the top outlet.

Moreover, the whitening tower also includes a drain outlet, a flow uniform device, a fan and a defogging section, the bottom of the tower body is coaxially connected with a drain outlet, and the tower body between the drain outlet and the condensation section is the same Equilibrium devices are arranged at intervals between shafts, and inlet flues are arranged on the tower body between the equilibrators and the drains;

The lower part of the inner cylinder is coaxially and tightly provided with a defogging section, and the defogging section is arranged above the condensing section and spaced apart from the condensing section;

The fan is connected with the inlet of the condensing section, and the fan can input air into the condensing section.

Moreover, the condensation section is a shell and tube heat exchanger.

Moreover, the whitening tower also includes a flushing water system, the flushing water system includes a flushing water output end, the flushing water output end is arranged on the tower body between the condensation section and the defogging section, and the flushing water output end outputs The flushing water can wash away the water precipitated in the condensation section to the bottom of the tower body.

Moreover, the demisting section is a pneumatic high-efficiency dedusting and mist eliminator.

Moreover, the drain port is connected to the inside of the desulfurization tower through a drain pump and a drain pipe.

The application of the above-mentioned wet desulfurization tail flue gas whitening tower in flue gas whitening.

The advantages and positive effects obtained by the utility model are:

1. The whitening tower includes a tower body, an inlet flue, a condensation section, an inner cylinder and a top outlet. When in use, the flue gas enters the tower body through the inlet flue, and then enters the condensation section to reduce the temperature of the flue gas, and the precipitated water Falling into the bottom of the tower body, the flue gas passes through the inner cylinder, the air for condensation passes through the air flow chamber, and finally the flue gas and the air for condensation are combined and discharged into the atmosphere; the inner cylinder separates the flue gas and air to prevent the flue gas from The condensed water enters the condenser along the air flow chamber, so that the large liquid droplets generated during the rising process of the flue gas are captured by the wall plate of the inner cylinder, reducing the entrainment of large liquid droplets in the flue gas; in addition, the contact between the flue gas above the inner cylinder and the air will Small droplets are produced, and before reaching the top of the chimney after a certain distance, the unsaturated flue gas mixture evaporates these small droplets again, so that the mixed flue gas discharged into the atmosphere no longer has white plumes, and the whitening tower can Reduce the water content and flue gas temperature in the flue gas after desulphurization by dehumidification, so that the flue gas discharged into the atmosphere no longer has a white plume that can be recognized by the naked eye, which greatly reduces the investment and operation and maintenance of the whitening system, and improves the efficiency. benefit, to achieve the purpose of energy saving and emission reduction.

2. The whitening tower includes the tower body, drain outlet, inlet flue, uniform flow device, condensation section, fan, defogging section, inner cylinder and top outlet. When in use, the flue gas can enter the uniform flow device horizontally or vertically After uniform flow, the flue gas enters the condensation section to reduce the temperature of the flue gas, the precipitated water flows out through the drain at the bottom of the tower body, and the flue gas passes through the demisting section to remove some water droplets, and finally the flue gas meets the air for condensation and is discharged The whitening tower can reduce the water content and flue gas temperature in the flue gas after desulphurization by dehumidification method, so that the flue gas discharged into the atmosphere no longer has white plumes that can be recognized by the naked eye, which greatly reduces the whitening. The investment and operation and maintenance of the system have improved the efficiency and achieved the goal of energy saving and emission reduction.

Description of drawings

Fig. 1 is the structural connection front view of the white tower of the utility model;

FIG. 2 is a schematic top view of the air flow in the condensation section in FIG. 1 .

Detailed ways

The utility model will be further described in detail below in conjunction with specific examples. The following examples are only descriptive, not restrictive, and cannot limit the protection scope of the utility model.

The structures not described in detail in this utility model can be understood as conventional structures in the art.

A wet desulfurization tail flue gas whitening tower, as shown in Figure 1 and Figure 2, the whitening tower includes a tower body 3, an inlet flue 10, a condensation section 6, an inner cylinder 2 and a top outlet 1, the The top of the tower body is coaxially connected with a top outlet, the lower part of the tower body is connected with an inlet flue, and the tower body above the inlet flue is coaxially arranged with a condensation section.

The innovation point of the present utility model is:

The inner cylinder is coaxially arranged in the tower body between the condensation section and the top outlet, the top of the inner cylinder is arranged below the top outlet, and an air flow chamber 4 is arranged between the inner cylinder and the inside of the tower body, and the air flow chamber It is connected with the output end of the condensation section and the tower above the inner cylinder, and the outer side of the upper surface of the condensation section is coaxially tightly connected to the bottom of the inner cylinder;

The outer side of the lower bottom surface of the condensing section is closely connected with the inner wall of the tower body through a sealing plate 7. The input end of the condensing section can input air, the medium of the condensing section is air, and the output end of the condensing section is connected with the air. The flow chambers are communicated, and the heat-exchanged air can enter the air flow chamber and finally merge with the treated flue gas output from the outlet of the inner cylinder at the top of the tower above the inner cylinder, and be discharged from the top outlet.

The whitening tower includes a tower body, an inlet flue, a condensation section, an inner cylinder and an outlet at the top. When in use, the flue gas enters the tower body through the inlet flue, and then enters the condensation section to reduce the temperature of the flue gas, and the precipitated water falls into the At the bottom of the tower body, the flue gas passes through the inner cylinder, the air used for condensation passes through the air flow chamber, and finally the flue gas meets the air used for condensation and is discharged into the atmosphere; the inner cylinder separates the flue gas and air to prevent condensation in the flue gas The water enters the condenser along the air flow chamber, so that the large liquid droplets generated during the rising process of the flue gas are captured by the wall plate of the inner cylinder, reducing the entrainment of large liquid droplets in the flue gas; in addition, the contact between the flue gas above the inner cylinder and the air will produce small Liquid droplets, before reaching the top of the chimney after a certain distance in the chimney, the unsaturated flue gas mixture evaporates these small droplets again, so that the mixed flue gas discharged into the atmosphere no longer has white plumes, and the whitening tower can reduce dehumidification. The water content and temperature of the flue gas after desulfurization by the desulfurization method make the flue gas discharged into the atmosphere no longer have a white plume that can be recognized by the naked eye, which greatly reduces the investment and operation and maintenance of the whitening system, and improves the efficiency. Achieved the purpose of energy saving and emission reduction.

In this embodiment, the white removal tower also includes a drain 9, a flow equalizer 8, a fan (not shown in the figure) and a defogging section 5, and the bottom of the tower body is coaxially connected with a drain, It is used to discharge the water flowing down from the condensing section and the demisting section. A uniform flow device is arranged coaxially on the tower body between the drain outlet and the condensation section, and an inlet smoke is installed on the tower body between the flow uniform device and the drain road;

The lower part of the inner cylinder is coaxially and tightly provided with a defogging section, and the defogging section is arranged above the condensing section and spaced apart from the condensing section;

The fan is connected with the inlet of the condensing section, and the fan can input air into the condensing section.

The whitening tower also includes a drain, a uniform flow device, a fan and a defogging section. When in use, the flue gas can enter the uniform flow device horizontally or vertically. After the uniform flow, the smoke enters the condensation section to reduce the temperature of the flue gas and precipitate The water flows out through the drain outlet at the bottom of the tower body, and the flue gas passes through the demisting section to remove part of the water droplets. Finally, the flue gas meets the air for condensation and is discharged into the atmosphere. The content of reclaimed water and the temperature of the flue gas make the flue gas discharged into the atmosphere no longer have a white plume that can be recognized by the naked eye, which greatly reduces the investment and operation and maintenance of the whitening system, improves the efficiency, and achieves the goal of energy saving and emission reduction. Purpose.

In this embodiment, the condensation section is a tube-and-tube heat exchanger.

In this embodiment, the whitening tower also includes a flushing water system (not shown in the figure), and the flushing water system includes a flushing water output end, and the flushing water output end is arranged between the condensation section and the defogging section On the tower body, the flushing water output from the flushing water output end can flush the water precipitated in the condensation section to the bottom of the tower body.

In this embodiment, the demist section is a pneumatic high-efficiency dust and mist eliminator.

In this embodiment, the drain port is connected to the inside of the desulfurization tower through a drain pump and a drain pipe (not shown in the figure).

A working process of the wet desulfurization tail flue gas elimination tower is:

The flue gas enters the bottom of the tower body through the inlet flue, passes upward through the uniform flow device to make the flue gas uniform, and then enters the condensation section (which can be a tube heat exchanger), and the water precipitated in the condensation section (washed by the flushing water to the ) flows to the bottom of the tower body, and flows out through the drain (it can be returned to the desulfurization tower through the drainage pump and drainage pipe). The blower (the blower can be set to be symmetrically arranged) sends the air from the outside of the tower to the condensation section, and the air after passing through the condensation section enters the outer cylinder and rises for a distance along the space between the inner cylinder and the outer cylinder (that is, the air flow chamber). The top air is combined with the treated flue gas and then discharged into the atmosphere. In particular, the cooling air and the desuperheated air are separated by the inner cylinder and then combined and discharged into the atmosphere.

Although the embodiment of the present utility model is disclosed for the purpose of illustration, those skilled in the art will understand that various replacements, changes and modifications are possible without departing from the spirit and scope of the present utility model and the appended claims Therefore, the scope of the present utility model is not limited to the content disclosed in the embodiment.

Claims (6)

1. White Tower 1. a kind of wet desulphurization tail flue gas disappears, the described White Tower that disappears include tower body, inlet flue duct, condensation segment, inner cylinder and top Portion outlet, the top of the tower body, which is coaxially connected, is arranged top exit, and the lower part of the tower body, which is connected, is arranged inlet flue duct, should Condensation segment is coaxially disposed in tower body above inlet flue duct, it is characterised in that:

   The inner cylinder coaxial arrangement is set to top exit at the top of the inner cylinder in the tower body between condensation segment, top exit Lower section, air flow lumen is set between the inner cylinder and tower body inside, on the output end of the air flow lumen and condensation segment, inner cylinder The tower body of side is connected setting, and coaxially closely the bottom of inner cylinder is arranged in connection in the outside of the upper surface of the condensation segment；

   The outside of the bottom surface of the condensation segment connects setting by the way that the inner wall of sealing plate and tower body is closely coupled, the condensation segment Input terminal can input air, the medium of the condensation segment is air, and the output end of the condensation segment is connected with air flow lumen to be set Set, the air after heat exchange be able to enter in air flow lumen and finally with from flue gas after the processing of the outlet output of inner cylinder in inner cylinder It merges together at the top of the tower body of top, and is discharged from top exit.
2. White Tower 2. wet desulphurization tail flue gas according to claim 1 disappears, it is characterised in that: the described White Tower that disappears further includes row The mouth of a river, flow-harmonization device, blower and demisting section, the bottom of the tower body, which is coaxially connected, is arranged discharge outlet, the discharge outlet, condensation Flow-harmonization device is arranged in coaxial spaced on tower body between section, and inlet flue duct is arranged on the tower body between the flow-harmonization device, discharge outlet；

   Coaxial close setting demisting section in the lower part of the inner cylinder, the demisting section be set to the top of condensation segment and with condensation segment phase Interval setting；

   The blower is connected setting with the entrance of condensation segment, which can input air in condensation segment.
3. White Tower 3. wet desulphurization tail flue gas according to claim 1 disappears, it is characterised in that: the condensation segment changes for tubulation Hot device.
4. White Tower 4. wet desulphurization tail flue gas according to claim 1 disappears, it is characterised in that: the described White Tower that disappears further includes punching Wash water system, the flushing water system includes flushing water output end, which is set between condensation segment, demisting section Tower body on, the flushing water of flushing water output end output can rinse out the water of condensation segment precipitation to tower body bottom.
5. White Tower 5. wet desulphurization tail flue gas according to claim 2 disappears, it is characterised in that: the demisting section is pneumatic high Imitate dedusting demister.
6. White Tower 6. wet desulphurization tail flue gas according to claim 2 disappears, it is characterised in that: the discharge outlet passes through draining Be connected setting in pump, drainage pipeline and desulfurizing tower.