CN211435763U - Flue gas desulfurization system and boiler system based on flue gas whitening - Google Patents

Abstract

The utility model discloses a flue gas desulfurization system and a boiler system based on flue gas desulfurization. The flue gas desulfurization system includes a desulfurization tower, a heat exchange device and a chimney. The desulfurization tower includes a tower body and a condenser arranged in the tower body. device, the tower body has an air inlet and an air outlet, the heat exchange device has a first medium channel and a second medium channel that can exchange heat with each other, the air inlet of the first medium channel is used to receive the pretreated flue gas, the first The air outlet of the medium channel is communicated with the air inlet of the desulfurization tower, the air outlet of the desulfurization tower is communicated with the air inlet of the second medium channel, and the air outlet of the second medium channel is communicated with the air inlet of the chimney. Since the heat exchange device exchanges heat with the flue gas and uses the condensing device to cool the flue gas in the desulfurization tower, the flue gas flowing into the desulfurization tower can be used to heat the flue gas flowing out of the desulfurization tower, and the flue gas flowing out from the desulfurization tower can be used to heat the flue gas flowing out of the desulfurization tower. The water vapor is no longer saturated, thereby further reducing the white smoke phenomenon of the flue gas.

Description

Flue gas desulfurization system and boiler system based on flue gas desulfurization

technical field

The utility model belongs to the technical field of industrial flue gas purification, in particular to a flue gas desulfurization system and a boiler system based on flue gas dewhitening.

Background technique

In recent years, with the increasingly strict environmental protection requirements of the state, the smog has become more and more serious, and the situation facing the realization of energy saving and emission reduction goals is very severe. In particular, a series of policies and related emission standards formulated to promote energy conservation and emission reduction, in the face of boiler/electricity/petrochemical industries with a large amount of flue gas and high H ₂ O content after wet desulfurization, flue gas containing NOx, The characteristics of SOx lead to the emission of low-temperature moist white smoke containing pollutants from the chimney. And it brings a series of environmental problems.

Although the current flue gas treatment system is equipped with a flue gas denitration system and a flue gas desulfurization system, it is still difficult to solve the problems of flue gas dehumidification and whitening; on the other hand, the utilization of flue gas waste heat is not high enough. It leads to the loss of a large amount of energy in the flue gas, increases the use of fuel in the boiler, and wastes resources.

The desulfurization tower is a commonly used desulfurization equipment in industrial flue gas treatment systems. Its desulfurization effect directly affects the dehumidification effect of the flue gas system and the effect of flue gas whitening.

Utility model content

The purpose of the utility model is to provide a flue gas desulfurization system and a boiler system based on flue gas dewhitening, which has solved the problems of high humidity of flue gas and easy formation of white smoke in the prior art.

One aspect of the embodiments of the present utility model provides a flue gas desulfurization system based on flue gas desulfurization, including: a desulfurization tower, a heat exchange device and a chimney,

The desulfurization tower comprises a tower body and a condensing device arranged in the tower body, and the tower body has an air inlet and an air outlet,

The heat exchange device has a first medium channel and a second medium channel that can exchange heat with each other, the air inlet of the first medium channel is used to receive the pretreated flue gas, and the air outlet of the first medium channel is connected to the The air inlet of the desulfurization tower is in communication, the air outlet of the desulfurization tower is in communication with the air inlet of the second medium passage, and the air outlet of the second medium passage is in communication with the air inlet of the chimney.

Optionally, the condensation device is close to the gas outlet of the desulfurization tower to cool the desulfurized flue gas.

Optionally, the heat exchange device is a ceramic heat exchanger.

Optionally, a water spray device is provided on the flue where the air outlet of the first medium channel leads to the air inlet of the desulfurization tower.

Optionally, the water spray device has a water inlet and a condensed water inlet, the water inlet is used for connecting to an external water source, and the condensed water inlet is communicated with the condensed water outlet of the condensing device.

Another aspect of the present utility model provides a boiler system, comprising: a boiler and the flue gas desulfurization system provided by the present utility model, wherein the boiler communicates with the air inlet of the first medium channel.

Optionally, the boiler system further includes a flue gas denitration system, and the flue gas denitration system is arranged on the flue of the boiler leading to the flue gas desulfurization system, so that the flue gas generated by the boiler first passes through the flue gas. The flue gas denitrification system then passes through the flue gas desulfurization system.

Optionally, a dust collector is provided on the flue between the flue gas denitration system and the flue gas desulfurization system,

and/or,

A first blower is arranged on the flue between the flue gas denitration system and the flue gas desulfurization system.

Optionally, an air preheater is provided on the flue between the flue gas denitration system and the flue gas desulfurization system, and the air preheater has a flue gas channel and an air channel that can exchange heat with each other, and the condensing device The air outlet of the air preheater is communicated with the air inlet of the air passage of the air preheater, and the air outlet of the air passage of the air preheater is communicated with the air inlet of the boiler;

The flue gas channel of the air preheater is connected in series on the flue between the flue gas denitration system and the flue gas desulfurization system.

Optionally, a heater and/or a second blower is further provided on the channel between the air preheater and the air outlet of the condensing device.

Compared with the prior art, the flue gas desulfurization system and the boiler system provided by the utility model have the following beneficial effects: the flue gas flowing into the desulfurization tower and the flue gas flowing out from the desulfurization tower are heat exchanged in the heat exchange device, and the flue gas flows into the desulfurization tower. The desulfurization tower uses the condensing device to cool the flue gas, so the flue gas flowing into the desulfurization tower can be used to heat the flue gas flowing out of the desulfurization tower, so the water vapor in the flue gas flowing out of the desulfurization tower is no longer saturated, especially the flue gas has been When a large amount of condensed water is precipitated in the condensing device, the water vapor content of the flue gas is greatly reduced after heating, thereby further reducing the white smoke phenomenon of the flue gas; in addition, the temperature of the flue gas flowing into the desulfurization tower is reduced, Thereby, the dewhitening effect of the flue gas flowing out of the desulfurization tower is more obvious after the temperature is raised, that is to say, the lower the flue gas temperature in the desulfurization tower and the higher the temperature of the flue gas after being discharged from the desulfurization tower, the better the dewhitening effect. Well, in this embodiment, the temperature of the flue gas discharged from the desulfurization tower and the flue gas entering the desulfurization tower is fully utilized, thereby saving energy.

Description of drawings

In order to illustrate the technical solutions of the embodiments of the present invention more clearly, the following briefly introduces the accompanying drawings that need to be used in the embodiments of the present invention. Obviously, the drawings described below are only some implementations of the present invention. For example, for those of ordinary skill in the art, other drawings can also be obtained based on these drawings without any creative effort.

FIG. 1 is a schematic structural diagram of a desulfurization tower in Embodiment 1 of the present invention.

2 is a schematic structural diagram of another form of the desulfurization tower in the first embodiment of the present invention.

3 is a schematic cross-sectional view of the structure of the condensed water collection device in Embodiment 1 of the present invention.

4 is a schematic diagram of a flue gas desulfurization system in Embodiment 2 of the present invention.

FIG. 5 is a schematic diagram of a flue gas desulfurization system provided with a water spray device 40 in the second embodiment of the present invention.

FIG. 6 is a schematic diagram of the boiler system in the second embodiment of the present invention.

7 is a schematic diagram of a boiler system in Embodiment 3 of the present invention.

FIG. 8 is a schematic diagram of a dust removal component provided at the air inlet of the SCR denitration device in the third embodiment of the present invention.

In the attached picture:

10-desulfurization tower; 11-tower body; 111-air inlet; 112-air outlet; 113-absorption zone; 12-demist device; 13-condenser device; 131-spray joint; 132-dispersion device; Condensed water collection device; 141-water storage tile; 142-drainage tile; 15-water spray device;

20- heat exchange device;

30 - chimney;

40- water spray device;

50 - boiler;

60-dust collector; 61-first blower;

70-air preheater; 71-air heater; 72-second blower;

8-flue gas denitration system; 80-SCR denitration device; 81-first economizer; 82-second economizer; 83-dust removal part; 84-dust accommodating part.

Detailed ways

Features and exemplary embodiments of various aspects of the invention are described in detail below. In the following detailed description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. However, it will be apparent to those skilled in the art that the present invention may be practiced without some of these specific details. The following description of the embodiments is merely to provide a better understanding of the present invention by illustrating examples of the present invention.

It should be noted that the embodiments in the present application and the features of the embodiments may be combined with each other in the case of no conflict. The embodiments will be described in detail below with reference to the accompanying drawings.

Embodiment 1

Referring to FIG. 1, it shows a schematic structural diagram of a desulfurization tower based on flue gas desulfurization in this embodiment. The desulfurization tower 10 includes: a tower body 11 and a mist removal device 12 and The condensing device 13 is arranged above the defogging device 12 , and the condensed water outlet of the condensing device ( 13 ) faces the defogging device 12 . Through the above technical solution, on the one hand, the flue gas in the desulfurization tower can be cooled to reduce the temperature of the flue gas after desulfurization; The spraying device of the defogging device 12 is cleaned, and the condensed water is condensed from the flue gas, which reduces the water vapor content in the flue gas, which is beneficial to the dewhitening of the flue gas and reduces the phenomenon of white plume in the flue gas. Wherein, the condensing device 13 can be air-cooled and/or water-cooled.

In order to achieve better spray cleaning effect, the condensate water outlet is provided with a spray joint 131, the spray joint 131 is arranged above the mist removal device 12, and the shape of the spray joint 131 is the same as the shape of the spray joint 131. The upper surface of the mist device 12 is matched. The spray joint 131 can ensure the uniformity of condensed water spraying. When the amount of condensed water is small, one more water inlet can be provided to the spray joint 131 for connecting to an external water source, so that effective spraying and flushing can be ensured even when the condensed water is insufficient. Of course, the setting method for uniformly spraying the condensed water is not limited to this. For example, the following technical solutions can also be adopted:

Referring to FIG. 2 , a dispersing device 132 for uniformly dispersing the condensed water is provided between the condensed water outlet and the demisting device 12. This technical solution can remove the spray joint 131, and the dispersing device 132 can disperse the falling water. The condensed water on the device 132 is uniformly dispersed and sprinkled on the demisting device 12. Specifically, the dispersing device 132 is a swirl plate.

The condensed water cleaned by the defogging device 12 can directly fall into the absorption zone 113 of the desulfurization tower 10, but in order not to affect the absorption effect of the absorption zone 113, the condensed water cleaned by the defogging device 12 can also be collected and discharged from the desulfurization tower. 10, the present embodiment provides the following technical solutions, specifically:

The desulfurization tower 10 also includes a condensed water collection device 14 arranged in the tower body 11 , and the condensed water collection device 14 is arranged below the demisting device 12 for collecting and cleaning the demisting device 12 . the condensed water, the water outlet of the condensed water collection device 14 leads to the outside of the tower body 11 . Through the above solution, the condensed water cleaned by the demisting device 12 can be discharged from the desulfurization tower 10 without affecting the absorption effect of the absorption zone 113 .

For the condensed water collecting device 14, while ensuring the effective collection of condensed water, sufficient flue gas circulation space is also provided so as not to affect the normal circulation of flue gas. Specifically, please refer to FIG. 3, the condensed water collecting device 14 Including several water-storing tiles 141 and several drainage tiles 142, the water-storing tiles 141 and the drainage tiles 142 are alternately distributed, so that the condensed water falling on the drainage tiles 142 flows into the water-storing tiles 141, and the There is a space between the water tile 141 and the drainage tile 142 , and the plurality of water-holding tiles 141 are all communicated with the drain port of the condensed water collecting device 14 . The interval between the water-containing tiles 141 and the drainage tiles 142 can ensure the normal circulation of flue gas, and the alternate distribution of the water-containing tiles 141 and the drainage tiles 142 can ensure that all the condensed water is collected. Further, the plurality of water-holding tiles 141 include a number of annular water-holding tiles with gradually decreasing diameters, and the plurality of drainage tiles 142 include a conical drainage tile and a plurality of annular drainage tiles with gradually decreasing diameters. Any two adjacent ones. An annular drainage tile is arranged above between the annular water-storing tiles, and the conical drainage tile is arranged above the annular water-storing tile with the smallest diameter. Among them, the annular water-holding tile with the largest diameter is attached to the inner wall of the tower body 11, all the drainage tiles 142 are at the same position and height, and all the water-containing tiles 141 are also at the same position and height, and the location of the drainage tile 142 is located. The height is higher than the height of the location where the water-storing tile 141 is located. Therefore, the flue gas has better fluidity, and the specific height difference can be determined according to the inner space of the tower body 11 and the water-holding effect of the water-holding tile 141 . The structural form of the water-storing tile 141 and the drainage tile 142 can be specifically designed according to the specific structure of the tower body 11. In this embodiment, the tower body 11 is cylindrical, so it is preferable to set the annular water-storing tile 141 and the drainage tile. 142.

Further, the desulfurization tower 10 further includes a water spray device 15 arranged in the tower body 11 , and the water spray device 15 is arranged below the mist removal device 12 . After the flue gas is passed into the desulfurization tower 10 , it is first subjected to desulfurization treatment, and then the demisting device 12 is used for demisting treatment, and then it is cooled by the condensing device 13 .

This embodiment also provides a flue gas treatment system, the desulfurization tower 10 provided in this embodiment. The desulfurization tower 10 in this embodiment can be used in various flue gas treatment systems, such as a boiler system of a coal-fired power plant, and the like.

Embodiment 2

4, the present embodiment provides a flue gas desulfurization system based on flue gas desulfurization, including: a desulfurization tower 10, a heat exchange device 20 and a chimney 30, the desulfurization tower 10 includes a tower body 11 and a The condensing device 13 in the body 11, the tower body 11 has an air inlet 111 and an air outlet 112, the heat exchange device 20 has a first medium channel and a second medium channel that can exchange heat with each other, the first medium The air inlet of the channel is used to receive the pretreated flue gas, the air outlet of the first medium channel is communicated with the air inlet 111 of the desulfurization tower 10, and the air outlet 112 of the desulfurization tower 10 is connected to the second The air inlet of the medium passage communicates with the air outlet of the second medium passage and the air inlet of the chimney 30 . Through the above technical solution, the flue gas flowing into the desulfurization tower 10 and the flue gas flowing out from the desulfurization tower 10 are heat-exchanged in the heat exchange device 20, and the condensing device 13 is used to cool the flue gas in the desulfurization tower 10, so the flow The flue gas entering the desulfurization tower 10 heats the flue gas flowing out from the desulfurization tower 10, so the water vapor in the flue gas flowing out from the desulfurization tower 10 is no longer saturated, especially when the flue gas has precipitated a large amount of condensed water in the condensing device 13. After heating the flue gas again, the water vapor content is greatly reduced, thereby further reducing the white smoke phenomenon of the flue gas; The dewhitening effect is more obvious after the gas temperature is raised, that is to say, the lower the flue gas temperature in the desulfurization tower 10 and the higher the temperature of the flue gas after being discharged from the desulfurization tower 10, the better the dewhitening effect is. The temperature of the flue gas discharged from the desulfurization tower 10 and the flue gas entering the desulfurization tower 10 is fully utilized, and energy is saved.

In this embodiment, the condensation device 13 is close to the gas outlet 112 of the desulfurization tower 10 to cool the desulfurized flue gas. In addition, the condensed water precipitated in the condensing device 13 can be used to clean other components in the desulfurization tower 10, such as the demisting device 12 in the first embodiment, and the desulfurization tower 10 in this embodiment can directly use the desulfurization provided in the first embodiment. Tower 10.

For the heat exchange device 20, in order to reduce the corrosion of the acid flue gas, a ceramic heat exchanger can be used.

Referring to FIG. 5 , a water spray device 40 is provided on the flue of the air outlet of the first medium channel leading to the air inlet 111 of the desulfurization tower 10 . The water spray device 40 can further spray and cool the flue gas flowing into the desulfurization tower 10 .

Wherein, the water spray device 40 has a water inlet and a condensed water inlet, the water inlet is used to connect an external water source, and the condensed water inlet is communicated with the condensed water outlet of the condensing device 13 . Therefore, the water spray device 40 can utilize the condensed water separated from the condensing device 13 according to the requirements, thereby saving water resources.

The flue gas desulfurization system in this embodiment can be understood as an implementable form of the flue gas treatment system in the first embodiment, that is, in an implementable form, the flue gas treatment system in the first embodiment is this embodiment The flue gas desulfurization system in the mode. Therefore, all the features of the flue gas desulfurization system in this embodiment can be directly applied to the flue gas treatment system in the first embodiment.

The flue gas desulfurization system provided in this embodiment can be used in a boiler system. Therefore, this embodiment further provides a boiler system. Referring to FIG. 6 , the boiler system includes: a boiler 50 and the flue gas provided in this embodiment. In the desulfurization system, the boiler 50 communicates with the air inlet of the first medium channel.

Further, the boiler system further includes a flue gas denitrification system 8, and the flue gas denitration system 8 is arranged on the flue of the boiler 50 leading to the flue gas desulfurization system, so that the flue gas generated by the boiler 50 is first After passing through the flue gas denitration system 8, it passes through the flue gas desulfurization system.

Wherein, a dust collector 60 is arranged on the flue between the flue gas denitration system 8 and the flue gas desulfurization system, and the dust collector 60 can dedust the flue gas in the flue gas passage to reduce flue gas pollution, and further, A first blower 61 is provided on the flue between the flue gas denitration system 8 and the flue gas desulfurization system. The first blower 61 plays the role of increasing the flow of flue gas.

Further, an air preheater 70 is provided on the flue between the flue gas denitration system 8 and the flue gas desulfurization system, and the air preheater 70 has a flue gas channel and an air channel that can exchange heat with each other, and the condensation The air outlet of the device 13 is communicated with the air inlet of the air passage of the air preheater 70, and the air outlet of the air passage of the air preheater 70 is communicated with the air inlet of the boiler 50; the air preheater 70 The flue gas channel is connected in series on the flue between the flue gas denitration system 8 and the flue gas desulfurization system. Since the cold air passing through the condensing device 13 cools the flue gas in the desulfurization tower 10, the temperature of the air coming out of the condensing device 13 will increase, so passing the air into the boiler system can improve the combustion efficiency, thereby making full use of energy and saving resources . Further, a heater 71 and/or a second blower 72 are also provided on the passage between the air preheater 70 and the air outlet of the condensing device 13 . The second blower 72 can further increase the air circulation, and the air heater 71 can heat the air at the inlet of the air preheater 70 .

Embodiment 3

This embodiment provides a boiler system based on waste heat recovery control and dewhitening of flue gas. Referring to FIG. 7 , the boiler system includes a boiler 50, a flue gas denitration system (8) and a flue gas desulfurization system that are connected in sequence. The gas denitration system (8) includes: an SCR denitration device 80, a first economizer 81 and a second economizer 82, the boiler 50 is communicated with the SCR denitration device 80, and the SCR denitration device 80 is connected with the flue gas The gas desulfurization system is connected, the first economizer 81 is arranged in the flue downstream of the SCR denitration device 80, and the second economizer 82 is arranged in the flue upstream of the SCR denitration device 80; the flue gas The gas desulfurization system includes: a desulfurization tower 10 , a heat exchange device 20 and a chimney 30 . The desulfurization tower 10 includes a tower body 11 and a condensation device 13 arranged in the tower body 11 , and the tower body 11 has an air inlet 111 and the air outlet 112, the heat exchange device 20 has a first medium channel and a second medium channel that can exchange heat with each other, the air inlet of the first medium channel is communicated with the SCR denitration device 80, the first medium channel The air outlet of the medium channel is communicated with the air inlet 111 of the desulfurization tower 10, the air outlet 112 of the desulfurization tower 10 is communicated with the air inlet of the second medium channel, and the air outlet of the second medium channel is connected to The air inlet of the chimney 30 is communicated. By arranging economizers both upstream and downstream of the SCR denitration device 80 , the energy in the flue gas can be fully recovered, and the temperature of the flue gas entering the SCR denitration device 80 can be conveniently controlled.

Specifically, the water inlet of the first economizer 81 is used to connect an external water source, the water outlet of the first economizer 81 is communicated with the water inlet of the second economizer 82, and the second economizer 82 The water outlet of the coal burner 82 is used to communicate with the water cooling wall. Of course, the first economizer 81 and the second economizer 82 may also be arranged in parallel.

Further, the water inlet of the first economizer 81 is provided with a three-way valve (not shown in the figure), the three-way valve has one water inlet and two water outlets, and the water inlet of the three-way valve is used for Connect to an external water source, one of the water outlets of the three-way valve is connected to the water inlet of the first economizer 81 , and the other water outlet of the three-way valve is connected to the water inlet of the second economizer 82 Connected. By adjusting the three-way valve, the feed water can be controlled to flow through the first economizer 81 and the second economizer 82 in sequence, or the feed water can be controlled to flow only through the second economizer 82 . The feed water only flows through the second economizer 82 to increase the purpose of recovering the heat of the flue gas by the second economizer 82 , thereby reducing the temperature of the flue gas entering the SCR denitration device 80 . In order to facilitate control, the three-way valve can be an electromagnetic three-way valve.

Further, the external water source includes a water pump (not shown in the figure) and a controller (not shown in the figure), the SCR denitration device 80 is provided with a temperature detection device, and the temperature detection device is electrically connected to the controller. connected to transmit the detected temperature parameters to the controller, the controller is electrically connected with the water pump to control the output power of the water pump, and the water pump outlet is communicated with the water inlet of the three-way valve . Through this technical solution, the temperature in the SCR denitration device 80 detected by the temperature detection device can be acquired by the controller, and then the output power of the water pump can be automatically controlled according to the temperature. In addition, a controller can also be configured to be electrically connected to the electromagnetic three-way valve to control the flow direction of the electromagnetic three-way valve. The temperature detection device may use a sensor that can adapt to the temperature detection in the SCR denitration device 80 .

The SCR denitration device 80 is provided with a relevant reaction layer. In order not to affect the denitration reaction, in this embodiment, the flue gas entering the SCR denitration device 80 is also subjected to dust removal treatment. Specifically, referring to FIG. 8 , the SCR denitration device 80 The air inlet is provided with a dust removal member 83 . The dust removal component 83 includes an electrode adsorption plate, and a dust accommodating portion 84 is provided on the flue below the electrode adsorption plate. The dust accommodating part 84 is used to collect the dust particles adsorbed on the electrode adsorption plate. When the weight of the dust particles is large enough, they will fall into the dust accommodating part 84 under the action of gravity. The dust accommodating part 84 can be provided with an outlet for discharging dust. When the dust in the dust accommodating part 84 reaches a certain amount, the dust is discharged in time. For dust removal, other methods can also be used, such as setting a dust baffle in the flue, which will not be described in detail here.

In order to achieve better adsorption effect, the edge of the electrode adsorption plate is set to be serrated.

Further, the cross-sectional flow area of the flue at the location of the dust removal component is larger than the cross-sectional flow area of the flue at the upstream position of the dust removal component. In this way, the flow velocity of the flue gas at the location of the dust removal component will be smaller than that of the dust removal component. The flow rate of the flue at the upstream position, so that the dust in the flue gas is easier to be adsorbed at this position.

In addition, the term "and/or" in this article is only an association relationship to describe the associated objects, indicating that there can be three kinds of relationships, for example, A and/or B, it can mean that A exists alone, A and B exist at the same time, There are three cases of B alone. In addition, the character "/" in this document generally indicates that the related objects are an "or" relationship.

It should be understood that, in the embodiment of the present invention, "B corresponding to A" means that B is associated with A, and B can be determined according to A. However, it should also be understood that determining B according to A does not mean that B is only determined according to A, and B may also be determined according to A and/or other information.

The above are only specific embodiments of the present invention, but the protection scope of the present invention is not limited to this. Equivalent modifications or replacements should be included within the protection scope of the present invention. Therefore, the protection scope of the present invention should be subject to the protection scope of the claims.

Claims (10)

1. a flue gas desulfurization system based on flue gas desulfurization, characterized in that, comprising: a desulfurization tower (10), a heat exchange device (20) and a chimney (30), The desulfurization tower (10) comprises a tower body (11) and a condensing device (13) arranged in the tower body (11), and the tower body (11) has an air inlet (111) and an air outlet (112) ), The heat exchange device (20) has a first medium channel and a second medium channel that can exchange heat with each other, the air inlet of the first medium channel is used to receive the pretreated flue gas, and the first medium channel has The air outlet is communicated with the air inlet (111) of the desulfurization tower (10), the air outlet (112) of the desulfurization tower (10) is communicated with the air inlet of the second medium channel, and the second medium The air outlet of the channel communicates with the air inlet of the chimney (30). 2 . The flue gas desulfurization system according to claim 1 , wherein the condensation device ( 13 ) is close to the gas outlet ( 112 ) of the desulfurization tower ( 10 ) to cool the desulfurized flue gas. 3 . 3. The flue gas desulfurization system according to claim 1, wherein the heat exchange device (20) is a ceramic heat exchanger. 4. The flue gas desulfurization system according to claim 1, characterized in that, a water jet is provided on the flue of the air outlet of the first medium channel leading to the air inlet (111) of the desulfurization tower (10) shower device (40). 5. The flue gas desulfurization system according to claim 4, wherein the water spray device (40) has a water inlet and a condensed water inlet, the water inlet is used to connect an external water source, and the condensed water inlet It is communicated with the condensed water outlet of the condensation device (13). 6. A boiler system, characterized in that, comprising: a boiler (50) and the flue gas desulfurization system according to any one of claims 1-5, the boiler (50) and the feed of the first medium channel Air connection. 7. The boiler system according to claim 6, characterized in that, the boiler system further comprises a flue gas denitration system (8), and the flue gas denitration system (8) is provided in the boiler (50) leading to the on the flue of the flue gas desulfurization system, so that the flue gas generated by the boiler (50) first passes through the flue gas denitration system (8) and then passes through the flue gas desulfurization system. 8. The boiler system according to claim 7, wherein a dust collector (60) is provided on the flue between the flue gas denitration system (8) and the flue gas desulfurization system, and/or, A first blower (61) is arranged on the flue between the flue gas denitration system (8) and the flue gas desulfurization system. 9 . The boiler system according to claim 7 , wherein an air preheater ( 70 ) is arranged on the flue between the flue gas denitration system ( 8 ) and the flue gas desulfurization system, and the air preheater The device (70) has a flue gas channel and an air channel that can exchange heat with each other, and the air outlet of the condensation device (13) communicates with the air inlet of the air channel of the air preheater (70). The air outlet of the air passage of (70) communicates with the air inlet of the boiler (50); The flue gas channel of the air preheater (70) is connected in series on the flue between the flue gas denitration system (8) and the flue gas desulfurization system. 10. The boiler system according to claim 9, characterized in that, the passage between the air preheater (70) and the air outlet of the condensing device (13) is further provided with an air heater (71) and /or second blower (72).

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