Device for preventing fouling of inlet flue of absorption tower

Abstract

The present invention relates to the technical field of flue gas desulfurization, and discloses a device for preventing fouling of the inlet flue of an absorption tower. The device for preventing fouling of the inlet flue of an absorption tower includes a spraying assembly, a data monitoring assembly, and a controller. The spraying assembly has spray heads, and the flushing water sprayed through the spray heads can cover the easily fouled positions of the inlet flue. The data monitoring assembly is used to detect the data information of the flue gas flowing through the inlet flue. The controller is set to selectively turn on or off the spraying assembly or adjust the pressure of the flushing water sprayed through the spray heads according to the data information of the flue gas. The device for preventing fouling of the inlet flue of an absorption tower provided by the present invention can achieve intermittent flushing of the easily fouled positions, and can control the pressure of the flushing water to avoid fouling while reducing water waste, thereby saving the treatment cost of the fouling layer and avoiding potential safety hazards.

Description

Technical Field

[0001] The present invention relates to the technical field of flue gas desulfurization, and particularly to a device for preventing fouling in the inlet flue of an absorption tower. Background Art

[0002] During the production process of domestic calcium-based flue gas desulfurization technology, the vast majority of units adopt the spray tower design process. Since part of the spray slurry will enter the original flue gas inlet duct and contact with the high-temperature dry flue gas, a crystalline scale layer is formed and adheres to the inlet duct, gradually blocking the duct. Due to the occurrence of fouling, the area below the fouling is a dangerous area, and there is a possibility of damage to equipment such as agitators below the fouling due to the falling of the fouling. The cost of taking measures during each maintenance is relatively high. At the same time, fouling will block the equipment filter screen, affecting the operation status of the equipment. Temporary cleaning of the equipment filter screen and other simple tasks are risky. In addition, the fouling entering the system may block the hydrocyclone, affecting the dehydration system. It can be seen that fouling in the original flue gas inlet duct will cause a series of problems, increasing the desulfurization cost and affecting the desulfurization efficiency. The traditional solution is to continuously spray flushing water through a nozzle towards the fouling position of the duct. This method of treating fouling increases the waste of water resources and thus increases the treatment cost of fouling. Summary of the Invention

[0003] In order to solve the above technical problems or at least partially solve the above technical problems, the present invention provides a device for preventing fouling in the inlet flue of an absorption tower.

[0004] The present invention provides a device for preventing fouling in the inlet flue of an absorption tower, including a spray component, a data monitoring component, and a controller. The spray component has a spray head, and the flushing water sprayed through the spray head can cover the easily fouled position of the inlet flue. The data monitoring component is used to detect the data information of the flue gas flowing through the inlet flue. The controller is configured to selectively turn on or off the spray component according to the data information of the flue gas, and / or adjust the pressure of the flushing water sprayed through the spray head.

[0005] Optionally, the data monitoring component includes a dust sensor, and the dust sensor is used to monitor the dust content in the flue gas flowing through the inlet flue.

[0006] When the dust content is at a preset dust content, the controller intermittently turns on the spray component and / or reduces the pressure of the flushing water sprayed through the spray head.

[0007] When the dust content is higher than the preset dust content, the controller continuously turns on the spray component and / or increases the pressure of the flushing water sprayed through the spray head.

[0008] Optionally, the data monitoring component includes a temperature sensor for monitoring the temperature of the flue gas flowing through the inlet flue, and when the temperature of the flue gas is greater than the preset flue gas temperature, the controller continuously turns on the spray component and increases the pressure of the flushing water sprayed through the spray head.

[0009] Optionally, the data monitoring component includes a velocity sensor for monitoring the flow velocity of the flue gas flowing through the inlet flue.

[0010] When the flow velocity of the flue gas is at the preset flow velocity, the controller intermittently turns on the spray component and / or reduces the pressure of the flushing water sprayed through the spray head;

[0011] When the flow velocity of the flue gas is higher than the preset flow velocity, the controller continuously turns on the spray component and / or increases the pressure of the flushing water sprayed through the spray head.

[0012] Optionally, the data monitoring component includes a pressure sensor for monitoring the pressure of the flue gas flowing through the inlet flue.

[0013] When the pressure of the flue gas is at the preset pressure, the controller intermittently turns on the spray component and / or reduces the pressure of the flushing water sprayed through the spray head;

[0014] When the pressure of the flue gas is greater than the preset pressure, the controller continuously turns on the spray component and / or increases the pressure of the flushing water sprayed through the spray head.

[0015] Optionally, the horizontal distance between the spray head and the easily fouled position of the inlet flue is 300 - 500 cm;

[0016] and / or, the vertical distance between the spray head and the easily fouled position of the inlet flue is 5 - 15 cm.

[0017] Optionally, the pressure of the flushing water sprayed through the spray head is 0.3 - 0.6 Pa.

[0018] Optionally, there are multiple spray heads, and the multiple spray heads are arranged in sequence along the width direction of the bottom plate of the inlet flue, and the arrangement density of the spray heads located at the connection of the bottom and side plates of the inlet flue is greater than the arrangement density of the spray heads located on the bottom plate of the inlet flue.

[0019] Optionally, the spray component further includes a flushing water tank, a water supply pipe and a spray pipe. The spray head is arranged on the spray pipe. The flushing water tank is used to hold the flushing water. The water supply pipe is used to connect the flushing water tank and the spray pipe. A water pump is provided on the water supply pipe to pump the water in the flushing water tank into the spray pipe so as to be sprayed out from the spray head.

[0020] Optionally, an overflow pipe and an introduction pipe are further connected to the flushing water tank. The introduction pipe is used to introduce the cooling water used by the absorption tower and / or its nearby equipment into the flushing water tank, and the excess flushing water in the flushing water tank is led out to a target position through the overflow pipe.

[0021] The technical solution provided by the embodiment of the present invention has the following advantages compared with the prior art:

[0022] The device for preventing fouling of the inlet flue of the absorption tower provided by the present invention can detect the data information of the flue gas flowing through the flue in real time through the data monitoring component. The controller can selectively turn on or off the spraying component or adjust the pressure of the spraying component according to the data information of the flue gas, so as to realize the intermittent flushing at the easily fouled position, and can control the pressure of the flushing water to avoid fouling while reducing water waste, thereby saving the treatment cost of the fouling layer and avoiding potential safety hazards. Description of the Drawings

[0023] The drawings here are incorporated into the specification and form a part of this specification, showing the embodiments in line with the present invention, and are used together with the specification to explain the principles of the present invention.

[0024] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, for those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0025] Figure 1 It is a schematic structural diagram of the device for preventing fouling of the inlet flue of the absorption tower in the use state according to the embodiment of the present invention.

[0026] Description of the Reference Numerals

[0027] 1. Inlet flue; 2. Absorption tower; 3. Spraying component; 31. Spray head; 32. Flushing water tank; 33. Water supply pipe; 331. Water pump; 34. Overflow pipe; 35. Introduction pipe. Detailed Embodiments

[0028] In order to more clearly understand the above-mentioned objects, features and advantages of the present invention, the following will further describe the solution of the present invention. It should be noted that, without conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other.

[0029] In the following description, many specific details are set forth in order to provide a thorough understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein; obviously, the embodiments in the specification are only some embodiments of the present invention, rather than all embodiments.

[0030] As Figure 1 shown, the device for preventing fouling of the inlet flue of the absorption tower provided by the embodiment of the present invention includes a spray assembly 3, a data monitoring assembly, and a controller. The spray assembly 3 has a spray head 31, and the spray head 31 is arranged on the inner wall of the inlet flue 1 to provide flushing water towards the inside of the inlet flue 1 through the spray head 31, and the flushing water sprayed by the spray head 31 can cover the easily fouled positions of the inlet flue 1 to avoid fouling at the easily fouled positions of the inlet flue 1. The data monitoring assembly is used to detect the data information of the flue gas flowing through the inlet flue 1, wherein the data information here includes dust content information, flue gas temperature information, flue gas flow rate information, and flue gas pressure information, etc. The controller is arranged to selectively turn on or off the spray assembly 3 according to the data information of the flue gas, and / or adjust the pressure of the flushing water sprayed by the spray head 31.

[0031] Specifically, the controller can send a corresponding working signal to the spray assembly 3 according to the data information of the flue gas. After receiving the corresponding working signal, the spray assembly 3 can turn on or off the spray assembly 3, and / or adjust the pressure of the flushing water sprayed by the spray head 31, so as to realize the intermittent flushing of the flushing water, or reduce the pressure of the flushing water to reduce the consumption of the flushing water, thereby reducing the use of water sources.

[0032] The device for preventing fouling of the inlet flue of the absorption tower provided by the present invention can detect the data information of the flue gas flowing through the flue in real time through the data monitoring assembly. The controller can selectively turn on or off the spray assembly 3 or adjust the pressure of the spray assembly 3 according to the data information of the flue gas, so as to realize the intermittent flushing at the easily fouled positions, and can control the pressure of the flushing water to avoid fouling while reducing water source waste, thereby saving the treatment cost of the fouling layer and avoiding potential safety hazards. In addition, a dangerous area is avoided from being formed below the easily fouled position of the inlet flue 1 to prevent unsafe factors caused by its fouling.

[0033] In some embodiments, the data monitoring assembly includes a dust sensor, and the dust sensor is used to monitor the dust content in the flue gas flowing through the inlet flue 1. When the dust content is at a preset dust content, the controller intermittently turns on the spray assembly 3 and / or reduces the pressure of the flushing water sprayed by the spray head 31; when the dust content is higher than the preset dust content, the controller continuously turns on the spray assembly 3 and / or increases the pressure of the flushing water sprayed by the spray head 31.

[0034] Specifically, the preset dust content in the flue gas is less than 40 mg / Nm 3 , that is, when the dust sensor monitors that the dust content in the flue gas flowing through the inlet flue 1 is less than 40 mg / Nm 3 , the controller can intermittently turn on the spray assembly 3 and / or reduce the pressure of the flushing water sprayed by the spray head 31 to reduce the waste of water resources. When the dust sensor monitors that the dust content in the flue gas flowing through the inlet flue 1 is higher than 40 mg / Nm 3 , the controller continuously turns on the spray assembly 3 and / or increases the pressure of the flushing water sprayed by the spray head 31 to ensure the flushing effect at the scaling position and avoid scaling. Among them, the dust sensor is a dust concentration sensor, which is a conventional component for detecting the dust content in the target substance, and its structure and working principle are not described in detail here.

[0035] In some embodiments, the data monitoring component includes a temperature sensor. The temperature sensor is used to monitor the temperature of the flue gas flowing through the inlet flue 1, and when the temperature of the flue gas is greater than the preset flue gas temperature, the controller continuously turns on the spray assembly 3 and increases the pressure of the flushing water sprayed by the spray head 31.

[0036] Specifically, the preset flue gas temperature here is less than 150 °C, that is, when the temperature sensor monitors that the temperature of the flue gas is greater than 150 °C, the controller continuously turns on the spray assembly 3 and increases the pressure of the flushing water sprayed by the spray head 31. When flushing the easily scaled position, the temperature of the flue gas can be effectively reduced so that the temperature of the flue gas entering the absorption tower 2 is less than 150 °C. Among them, the temperature sensor is a conventional device for detecting the temperature of the target substance, and its structure and working principle are not described in detail here.

[0037] In some embodiments, the data monitoring component includes a velocity sensor. The velocity sensor is used to monitor the flow velocity of the flue gas flowing through the inlet flue 1. When the flow velocity of the flue gas is at the preset flow velocity, the controller intermittently turns on the spray assembly 3 and / or reduces the pressure of the flushing water sprayed by the spray head 31; when the flow velocity of the flue gas is higher than the preset flow velocity, the controller continuously turns on the spray assembly 3 and / or increases the pressure of the flushing water sprayed by the spray head 31.

[0038] Specifically, the preset flow rate of the flue gas here is 13 - 14 m / s. That is, when the speed sensor monitors that the flow rate of the flue gas flowing through the inlet flue 1 is 13 - 14 m / s, the controller intermittently turns on the spray assembly 3 and / or reduces the pressure of the flushing water sprayed by the spray head 31. When the speed sensor monitors that the flow rate of the flue gas flowing through the inlet flue 1 is greater than 14 m / s, the controller continuously turns on the spray assembly 3 and / or increases the pressure of the flushing water sprayed by the spray head 31. Among them, the speed sensor is a common device for detecting the speed of the target substance, and its structure and working principle are not described in detail here.

[0039] In some embodiments, the data monitoring component includes a pressure sensor. The pressure sensor is used to monitor the pressure of the flue gas flowing through the inlet flue 1. When the pressure of the flue gas is at the preset pressure, the controller intermittently turns on the spray assembly 3 and / or reduces the pressure of the flushing water sprayed by the spray head 31; when the pressure of the flue gas is greater than the preset pressure, the controller continuously turns on the spray assembly 3 and / or increases the pressure of the flushing water sprayed by the spray head 31.

[0040] Specifically, the preset pressure of the flue gas here is below 2500 Pa. That is, when the pressure sensor monitors that the pressure of the flue gas is below 2500 Pa, the controller intermittently turns on the spray assembly 3 and / or reduces the pressure of the flushing water sprayed by the spray head 31. When the pressure sensor monitors that the pressure of the flue gas is higher than 2500 Pa, the controller continuously turns on the spray assembly 3 and / or increases the pressure of the flushing water sprayed by the spray head 31. Among them, the pressure sensor is a common device for detecting the pressure of the target substance, and its structure and working principle are not described in detail here.

[0041] It can be understood that the dust sensor, temperature sensor, speed sensor, and pressure sensor of the present application can be used simultaneously. And when one of the dust sensor, temperature sensor, speed sensor, and pressure sensor monitors that the data information of the flue gas is higher than the preset information, the controller continuously turns on the spray assembly 3 and / or increases the pressure of the flushing water sprayed by the spray head 31.

[0042] In some embodiments, the spray head 31 can swing along the vertical direction to increase the coverage area of the spray head 31 and ensure that the spray area of the spray head 31 can completely cover the easily fouled position of the inlet flue 1. Among them, when there are multiple spray heads 31, the multiple spray heads 31 can be arranged on the following spray pipe. At this time, the spray pipe can be set to swing along the vertical direction to drive the multiple spray heads 31 to swing along the vertical direction. Specifically, a driving motor can be arranged on the inner wall of the inlet flue 1, and the spray pipe is driven to rotate by the driving motor. This driving method is a conventional technology in the art, so it is not described in detail here.

[0043] In some embodiments, the horizontal distance between the spray head 31 and the scale - prone position of the inlet flue 1 is 300 - 500 cm; and / or, the vertical distance between the spray head 31 and the scale - prone position of the inlet flue 1 is 5 - 15 cm. The scouring water sprayed by the spray head 31 under such arrangement dimensions can cover the scale - prone position of the inlet flue 1.

[0044] In some embodiments, the pressure of the scouring water sprayed by the spray head 31 is 0.3 - 0.6 Pa. The scouring water under such pressure can ensure the scouring effect at the scale - prone position of the inlet flue 1, avoid scale formation, and at the same time can save the amount of scouring water used and the water source cost.

[0045] In some embodiments, there are multiple spray heads 31, and the multiple spray heads 31 are arranged in sequence along the width direction of the bottom plate of the inlet flue 1, and the arrangement density of the spray heads 31 at the connection of the bottom and side plates of the inlet flue 1 is greater than the arrangement density of the spray heads 31 on the bottom plate of the inlet flue 1.

[0046] Specifically, the inlet flue 1 has a bottom plate, a top plate, and two side plates for connecting the bottom plate and both sides of the bottom plate. Among them, the multiple spray heads 31 are arranged in sequence along the width direction of the bottom plate so that the multiple spray heads 31 can provide scouring water towards the scale - prone position of the bottom plate and scour the corresponding position of the bottom plate. And because the connection of the bottom and side plates is more likely to accumulate scale, more spray heads 31 are arranged at the connection of the bottom and side plates to ensure the scouring effect.

[0047] In some embodiments, the part of the bottom plate of the inlet flue 1 facing the absorption tower 2 has a 30° slope, and the scouring water will carry scale - prone impurities such as dust and slurry back to the absorption tower 2.

[0048] In some embodiments, the pipelines in the inlet flue 1 can be made of stainless steel pipes, resin - glass steel pipes or carbon steel pipes for anti - corrosion to prevent corrosion and high - temperature damage.

[0049] In some embodiments, as Figure 1 shown, the spray assembly 3 further includes a flushing water tank 32, a water supply pipe 33 and a spray pipe. The spray head 31 is arranged on the spray pipe. The flushing water tank 32 is used to hold the scouring water, and the water supply pipe 33 is used to connect the flushing water tank 32 and the spray pipe. A water pump 331 is provided on the water supply pipe 33 to pump the water in the scouring water tank 331 into the spray pipe so as to be sprayed out from the spray head 31.

[0050] Specifically, the flushing water tank 32 is used to hold flushing water. The spray head 31 is arranged on the spray pipe. When there are multiple spray heads 31, the multiple spray heads 31 are arranged at intervals along the length direction of the spray pipe to stably supply flushing water to the multiple spray heads 31 through the spray pipe. The spray pipe is connected to the flushing water tank 32 through a water supply pipe 33, and a water supply pump 331 pumps the flushing water in the flushing water tank 32 towards the spray pipe, so that the flushing water can be stably sprayed out from the spray head 31. Among them, the water pump 331 is signal-connected to the controller, so that the controller can control the opening or closing of the water pump 331, or adjust the pumping volume of the water pump 331, and further adjust the pressure of the flushing water sprayed out through the spray head 31.

[0051] In some embodiments, the nozzle of the spray head 31 can be a fan-shaped duckbill spray head, so as to cover the entire easily fouled surface, ensure the anti-fouling effect, and at the same time reduce the number of spray heads 31 and lower the component cost.

[0052] In some embodiments, continue to refer to Figure 1 , an overflow pipe 34 and an introduction pipe 35 are further connected to the flushing water tank 32. The introduction pipe 35 is used to introduce the cooling water used by the absorption tower 2 and / or its nearby equipment into the flushing water tank 32, and the excess flushing water in the flushing water tank 32 is led out to the target position through the overflow pipe 34.

[0053] The cooling water of the absorption tower 2 can be recycled. In the traditional method, the cooling water of the absorption tower 2 can be collected and used to configure fresh slurry in the process water tank, or directly enter the trench and be pumped back to the absorption tower 2 through a sump pump. However, although recycling to the process water tank can save the desulfurization water consumption, it will increase the process water temperature and is not conducive to equipment cooling. The method of pumping back to the absorption tower 2 through a sump pump reduces the cooling efficiency. In this application, the cooling water of the absorption tower 2 is used for anti-fouling at the entrance of the inlet flue 1 to the absorption tower 2, and can be used as the flushing water for anti-fouling without negative effects, so as to reasonably utilize resources.

[0054] In addition, there are many equipment around the desulfurization tower that need to be cooled by cooling water for 24 hours and then flow into the sump of the absorption tower 2 through the discharge trench and be pumped into the absorption tower 2 through a sump pump, such as: the mechanical seal of the circulation pump, the cooler of the reducer, etc. This way of recycling the cooling water causes an increase in the temperature of the circulating cooling water and affects the cooling effect of the cooling water.

[0055] In this application, the cooling water used by the absorption tower 2 and / or its nearby equipment is introduced into the flushing water tank 32 for use as flushing water, which will not affect the equipment and will not affect the flushing effect due to the heat of the cooling water, ensuring the reasonable utilization of the cooling water.

[0056] During use, the cooling water in the flushing water tank 32 is used as flushing water. The continuous cooling water is pumped to the easily fouling positions of the inlet flue 1 by the water pump 331 to prevent fouling. When the liquid level of the cooling water in the flushing water tank 32 reaches the maximum liquid level, the cooling water will flow out through the overflow pipe 34 to a target position such as a collecting tank for standby use. It can be understood that a float electrically connected to the controller is also provided in the flushing water tank 32. When the float indicates that the liquid level in the flushing water tank 32 is lower than the preset liquid level, the cooling water in the collecting tank can be replenished into the flushing water tank 32 to avoid affecting the supply effect of the flushing water.

[0057] It should be noted that in this text, relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "comprising an..." does not exclude the existence of additional identical elements in the process, method, article or device comprising the said element.

[0058] The above are only specific embodiments of the present invention, enabling those skilled in the art to understand or implement the present invention. Various modifications to these embodiments will be obvious to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to these embodiments described herein, but rather to the broadest scope consistent with the principles and novel features disclosed herein.

Claims

1. An apparatus for preventing fouling in the inlet flue of an absorption tower, characterized in that, It includes a spray component (3), a data monitoring component, and a controller. The spray component (3) has a spray head (31), and the flushing water sprayed through the spray head (31) can cover the easily fouling positions of the inlet flue (1). The data monitoring component is used to detect the data information of the flue gas flowing through the inlet flue (1). The controller is configured to selectively turn on or off the spray component (3) according to the data information of the flue gas, and / or adjust the pressure of the flushing water sprayed through the spray head (31); The data monitoring component includes a dust sensor, and the dust sensor is used to monitor the dust content in the flue gas flowing through the inlet flue (1); When the dust content is at a preset dust content, the controller intermittently turns on the spray component (3) and / or reduces the pressure of the flushing water sprayed through the spray head (31); When the dust content is higher than the preset dust content, the controller continuously turns on the spray component (3) and / or increases the pressure of the flushing water sprayed through the spray head (31); The data monitoring component includes a velocity sensor, and the velocity sensor is used to monitor the flow velocity of the flue gas flowing through the inlet flue (1); When the flow velocity of the flue gas is at a preset flow velocity, the controller intermittently turns on the spray component (3) and / or reduces the pressure of the flushing water sprayed through the spray head (31); When the flow velocity of the flue gas is higher than the preset flow velocity, the controller continuously turns on the spray component (3) and / or increases the pressure of the flushing water sprayed through the spray head (31); The data monitoring component includes a pressure sensor, and the pressure sensor is used to monitor the pressure of the flue gas flowing through the inlet flue (1); When the pressure of the flue gas is at a preset pressure, the controller intermittently turns on the spray component (3) and / or reduces the pressure of the flushing water sprayed through the spray head (31); When the pressure of the flue gas is greater than the preset pressure, the controller continuously turns on the spray component (3) and / or increases the pressure of the flushing water sprayed through the spray head (31).

2. The device for preventing fouling of the inlet flue of the absorption tower according to claim 1, characterized in that, The data monitoring component includes a temperature sensor, and the temperature sensor is used to monitor the temperature of the flue gas flowing through the inlet flue (1). When the temperature of the flue gas is greater than the preset flue gas temperature, the controller continuously turns on the spray component (3) and increases the pressure of the flushing water sprayed through the spray head (31).

3. The device for preventing fouling of the inlet flue of the absorption tower according to claim 1, wherein The horizontal distance between the spray head (31) and the easily fouling position of the inlet flue (1) is 300 - 500 cm; And / or, the vertical distance between the spray head (31) and the easily fouling position of the inlet flue (1) is 5 - 15 cm.

4. The device for preventing fouling of the inlet flue of the absorption tower according to claim 1, characterized in that, The pressure of the flushing water sprayed through the spray head (31) is 0.3 - 0.6 Pa.

5. The device for preventing fouling of the inlet flue of the absorption tower according to claim 1, characterized in that, There are multiple spray heads (31), and the multiple spray heads (31) are arranged in sequence along the width direction of the bottom plate of the inlet flue (1), and the arrangement density of the spray heads (31) located at the connection of the bottom and side plates of the inlet flue (1) is greater than the arrangement density of the spray heads (31) located on the bottom plate of the inlet flue (1).

6. The device for preventing fouling of the inlet flue of the absorption tower according to claim 1, wherein the spraying assembly (3) further comprises a flushing water tank (32), a water supply pipe (33) and a spraying pipe. The spraying nozzles (31) are arranged on the spraying pipe. The flushing water tank (32) is used for containing the flushing water. The water supply pipe (33) is used for connecting the flushing water tank (32) and the spraying pipe. A water pump (331) is arranged on the water supply pipe (33) to send the water pump (331) in the flushing water tank into the spraying pipe so as to spray out from the spraying nozzles (31).

7. The device for preventing fouling of the inlet flue of the absorption tower according to claim 6, wherein an overflow pipe (34) and an introducing pipe (35) are further connected to the flushing water tank (32). The introducing pipe (35) is used for introducing the cooling water used by the absorption tower and / or its nearby equipment into the flushing water tank (32). The redundant flushing water in the flushing water tank (32) is led out to a target position through the overflow pipe (34).

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