An air-lift collector for a scrubbing column and a mist eliminator cleaning method

Abstract

The application discloses a gas-lifting liquid collecting device for a washing tower, and belongs to the technical field of washing towers. The washing tower comprises a tower body, a cooling part demister, a gas-lifting liquid collecting device, a dehumidification part filler and a dehumidification part spraying layer which are sequentially arranged from bottom to top along the inside of the tower body. The gas-lifting liquid collecting device comprises at least two layers of flow guide layers arranged along the height direction of the tower body. The flow guide layer comprises a plurality of groups of flow guide vanes which are equidistantly arranged along the radial direction of the tower body. The flow guide vanes are in V-shaped structure. A gap is arranged between two adjacent groups of flow guide vanes. The flow guide vanes of two adjacent layers of flow guide layers are arranged in a staggered mode. The end of the flow guide vane is connected with an actuator through a transmission mechanism, and the opening direction or the opening angle of the flow guide vane is adjusted. A flow collecting groove is arranged on the inner wall of the tower body, and a backflow port connected with the flow collecting groove is arranged on the outer wall of the tower body. The gas-lifting liquid collecting device can be flexibly replaced between a gas-liquid separation mode and a demister cleaning mode according to the requirement. The gas-lifting liquid collecting device not only has a gas-liquid diversion function, but also can efficiently clean the cooling part demister.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of washing tower, in particular to a gas-lifting liquid collecting device for washing tower and a demister cleaning method. BACKGROUND

[0002] At present, the single-tower double-circulation structure wet washing tower is generally used in domestic garbage incineration ultra-low emission process for deacidification and de-whitening. The wet washing tower mainly consists of a cooling part and a dehumidifying part. The incineration flue gas enters the cooling part from the inlet flue at the lower part of the wet washing tower, contacts with the cooling circulating liquid sprayed by the cooling spray layer of the cooling part, realizes flue gas cooling and deacidification, and most of the pollutants are absorbed by the spray liquid. The flue gas goes up into the dehumidifying part and contacts with the dehumidifying circulating liquid, realizes flue gas dehumidification and de-whitening, and deep purification. A demister is arranged at the outlet of the cooling part of the washing tower to intercept the liquid droplets entrained in the flue gas, so as to avoid adverse effects on the subsequent process structure. The cooling part and the dehumidifying part are separated by a gas-lifting liquid collecting device. The flue gas passes through the gas-lifting liquid collecting device and enters the dehumidifying part, while the dehumidifying circulating liquid sprayed by the dehumidifying part is collected by the gas-lifting liquid collecting device and then discharged to the dehumidifying water tank arranged outside the tower for recycling. Since the cooling circulating liquid contains salts and impurities, scaling and crystallization easily occur on the demister in the cooling part after a long time of operation, especially when the concentration of the circulating liquid is high, which may even cause blockage, affecting the demisting effect of the demister, and leading to an increase in the pressure drop of the washing tower and an increase in the power consumption of the induced draft fan. Therefore, the demister needs to be cleaned to avoid affecting the efficient operation of the system.

[0003] In the garbage incineration power generation system, the wet washing tower generally uses Na-based absorbent. Compared with thermal power or other industries using Ca-based absorbent, the frequency of demister scaling and blockage in the washing tower is relatively low. Many garbage incineration wet washing towers do not have a demister cleaning device. When the demister is blocked, the furnace needs to be stopped, the demister needs to be taken out and cleaned, which is time-consuming and labor-intensive, and affects the normal use of the washing tower. Chinese patent CN 207356919 U discloses a variable-diameter single-tower double-circulation deacidification and de-whitening flue gas wet washing device. A set of flushing water module, pipeline and demister flushing device are separately arranged, and the demister flushing device is connected with the flushing water module through the pipeline. Chinese patent CN 113842712 A discloses a demister support with cleaning function, a water supplement system and a water supplement method. The patent adopts a demister support with cleaning function, and the demister is cleaned by arranging a plurality of connecting pipes and atomizing nozzles on the demister support. The above-mentioned demister cleaning method needs to set up accessories such as spray pipe, nozzle, pump, water tank, etc., and the system structure is complex. It needs to provide additional water source and jet power, and the water consumption and power consumption are large during long-term operation, and the operation cost is high. If it is not operated for a long time, the nozzle is also easy to crystallize and scale, causing cleaning system failure. SUMMARY

[0004] The application aims to provide a lifting gas liquid collecting device, which can conveniently adjust the working mode and efficiently realize the cleaning operation of the cooling part demister while meeting the normal work of the washing tower.

[0005] Technical scheme: The lifting gas liquid collecting device for the washing tower comprises at least two layers of guide layers arranged along the height direction of the tower body, the guide layer comprises a plurality of groups of guide vanes arranged at equal intervals along the radial direction of the tower body, the guide vane is of a V-shaped structure, a gap is arranged between the adjacent two groups of guide vanes, and the guide vanes of the upper and lower two layers of guide layers are arranged in a staggered manner; the end of the guide vane is connected with an actuator through a transmission mechanism, the actuator controls the guide vane to rotate along the axial direction and adjusts the opening direction or opening angle of the guide vane through the transmission mechanism; a flow collection groove is arranged below the guide layer on the circumferential inner wall of the tower body, and a backflow port connected with the flow collection groove is arranged on the outer wall of the tower body.

[0006] Preferably, the guide vane is of a fixed structure, and the V-shaped opening angle a of the guide vane is 60-120°.

[0007] Preferably, the guide vane is connected with a rotating shaft at the root, a support shaft sleeve for mounting the rotating shaft is arranged on the side wall of the tower body, and one end of the rotating shaft is connected with the transmission mechanism.

[0008] Preferably, the guide vane is of an adjustable opening structure, and the V-shaped opening angle a of the guide vane is adjustable within 0-120°.

[0009] Preferably, the guide vane comprises a first guide vane and a second guide vane, the first guide vane is connected with a first rotating shaft at the root, the second guide vane is connected with a second rotating shaft at the root, the second rotating shaft is of a ring-shaped clamping groove structure with an opening along the axial direction, and the opening angle of the second rotating shaft is consistent with the maximum V-shaped opening angle of the guide vane; the first rotating shaft is rotatably clamped in the ring-shaped clamping groove of the second rotating shaft.

[0010] Preferably, one end of the first rotating shaft is longer than the length of the second rotating shaft on the same side, and a first support shaft sleeve for supporting the first rotating shaft is arranged on the side wall of the tower body; the other end of the second rotating shaft is longer than the length of the first rotating shaft on the same side, and a second support shaft sleeve for supporting the second rotating shaft is arranged on the side wall of the tower body; the first rotating shaft is connected with a first actuator through a first transmission mechanism; and the second rotating shaft is connected with a second actuator through a second transmission mechanism.

[0011] Preferably, a support beam corresponding to the guide layer is arranged in the tower body, and the support beam is arranged in a direction perpendicular to the guide vane.

[0012] Preferably, the transmission mechanism is a gear transmission mechanism or a chain transmission mechanism; and the actuating mechanism is a servo motor or a stepping motor.

[0013] A cleaning method of a washing tower demister, comprising a cleaning step of using a gas-lifting liquid collecting device:

[0014] Step 1: the actuating mechanism controls the guide vanes to rotate along the tower body in a radial direction through the transmission mechanism, adjusts the V-shaped opening of each guide vane of the lower guide layer to face directly upward, adjusts the V-shaped opening of each guide vane of the upper guide layer to face directly upward or downward, and the gas-lifting liquid collecting device performs the gas-lifting and liquid collecting functions in this state;

[0015] Step 2: if cleaning of the cooling section demister is required, the actuating mechanism and the transmission mechanism are used to control the rotation of each guide vane of the upper guide layer or the lower guide layer, and the opening direction of the guide vanes is changed so that the dehumidification circulating liquid passes through the gas-lifting liquid collecting device to clean the cooling section demister;

[0016] Step 3: after the cleaning of the cooling section demister is completed, the actuating mechanism is controlled to drive the transmission mechanism to drive the upper guide layer and the lower guide layer to return to the state of step 1.

[0017] Preferably, if the guide vanes with adjustable openings are used, in step 2, the first guide vane and the second guide vane are respectively rotated by 0-α / 2° in opposite directions through the first transmission mechanism and the first actuating mechanism matched with the first rotating shaft and the second transmission mechanism and the second actuating mechanism matched with the second rotating shaft, so as to change the opening angle of the guide vanes.

[0018] Advantages: compared with the prior art, the gas-lifting liquid collecting device of the embodiment of the present application has the following outstanding advantages: 1. The gas-lifting liquid collecting device not only has the gas-liquid separation function, but also can efficiently clean the cooling section demister, can be flexibly changed between the gas-liquid separation mode and the demister cleaning mode as required, can reduce the probability of crystallization shutdown of the washing tower demister, and is conducive to the continuous and stable operation of the washing tower. 2. The cleaning water source of the cooling section demister is taken from the dehumidification circulating liquid with relatively clean water quality, which not only saves the demister flushing water, but also completes the cleaning of the demister through the free falling of the dehumidification circulating liquid, without the need to provide additional power, and the operation cost is relatively low. 3. The gas-lifting liquid collecting device of the embodiment of the present application has a simple structure, the guide vanes arranged in the tower and the power system matched outside the tower can reduce the complexity of the cleaning system, thereby improving the working efficiency of the washing tower. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 FIG. 1 is a schematic view of the position and structure of the gas-lifting liquid collecting device in the washing tower of the present application;

[0020] Figure 2 FIG. 2 is a schematic view of the position and structure of the gas-lifting liquid collecting device in the washing tower of the present application; Figure 1Structure of the first embodiment of the gas-lifting liquid-collecting device viewed from A-A direction;

[0021] Figure 3 For Figure 1 Structure of the second embodiment of the gas-lifting liquid-collecting device viewed from A-A direction;

[0022] Figure 4 For Figure 2 Structure of the gas-lifting vane viewed from A-A direction;

[0023] Figure 5 For Figure 3 Structure of the gas-lifting vane viewed from A-A direction;

[0024] Figure 6 For Figure 1 Structure of the gas-lifting vane viewed from A-A direction;

[0025] Figure 7 For Figure 2 Structure of the gas-lifting vane viewed from A-A direction;

[0026] Figure 8 For Figure 2 Structure of the gas-lifting vane viewed from A-A direction;

[0027] Figure 9 For Figure 3 Structure of the gas-lifting vane viewed from A-A direction;

[0028] Figure 10 For Figure 3 Structure of the gas-lifting vane viewed from A-A direction.

[0029] The figure mark: 1, tower body; 2, cooling part demister; 3, gas-lifting liquid-collecting device; 301, gas-lifting vane; 302, rotating shaft; 303, support shaft sleeve; 304, sealing ring; 305, transmission mechanism; 306, actuator; 307, confluence groove; 308, backflow port; 309, support crossbeam; 310, gap; 301a, first gas-lifting vane; 301b, second gas-lifting vane; 302a, first rotating shaft; 302b, second rotating shaft; 303a, first support shaft sleeve; 303b, second support shaft sleeve; 304a, first sealing ring; 304b, second sealing ring; 305a, first transmission mechanism; 305b, second transmission mechanism; 306a, first actuator; 306b, second actuator; 4, dehumidification part filler; 5, dehumidification part spray layer. DETAILED DESCRIPTION

[0030] In order to make the purpose, technical scheme and advantages of the embodiments of the present application more clear, the following will combine the drawings of the embodiments of the present applicationFigures 1-10 The technical solutions of the embodiments of the present application are clearly and completely described. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. Based on the described embodiments of the present application, all other embodiments obtained by those skilled in the art belong to the scope of protection of the present application.

[0031] As Figure 1 As shown in the drawings, the present application is a gas-lifting liquid collecting device for a washing tower, which includes a tower body 1 and, from bottom to top along the inside of the tower body, a cooling section demister 2, a gas-lifting liquid collecting device 3, a dehumidification section filler 4, and a dehumidification section spray layer 5. The washing tower is applied to the removal of SO2 and HCl in flue gas generated by waste incineration. The incineration flue gas enters the cooling section from the bottom of the washing tower, contacts the cooling circulating liquid sprayed by the cooling spray layer of the cooling section, realizes the cooling and deacidification of the incineration flue gas, and most of the pollutants in the incineration flue gas are absorbed by the spray liquid in this process. The cooling section is also provided with a demister for intercepting liquid droplets entrained in the incineration flue gas. The cooling section demister 2 is separated from the dehumidification section by the gas-lifting liquid collecting device 3 above it. After the flue gas passes through the cooling section, it enters the dehumidification section through the gas-lifting liquid collecting device 3 and contacts the dehumidification circulating liquid in the dehumidification section, realizing the dehumidification and deep purification of the flue gas. The gas-lifting liquid collecting device 3 provides a channel for the rising flue gas and realizes the collection of the dehumidification circulating liquid of the dehumidification section and the discharge of the washing tower for recycling.

[0032] The gas-lifting liquid collecting device 3 includes at least two layers of flow guide layers arranged along the height direction of the tower body. The flow guide layer includes a plurality of groups of flow guide vanes 301 arranged at equal intervals along the radial direction of the tower body. The flow guide vanes 301 are V-shaped structures, and gaps 310 are provided between adjacent two groups of flow guide vanes 301. The flow guide vanes 301 of the upper and lower adjacent two layers of flow guide layers are arranged in a staggered manner. Figures 1-3As shown, the flow guide layer includes six groups of parallel arranged flow guide vanes, gaps are arranged between adjacent two groups of flow guide vanes, the gap width between adjacent two groups of flow guide vanes of the lower flow guide layer is less than the width of the horizontal plane projection of the flow guide vanes of the upper flow guide layer, the flow guide vanes have gaps 310 between both ends and the wet method tower wall, and the gap is less than the width of the flow collecting groove, that is, after the staggered arrangement of the flow guide vanes distributed in the upper and lower flow guide layers, full coverage of the horizontal plane in the tower body can be realized, so that the flue gas can pass from the upward gas collecting and liquid discharging device, and the dehumidification circulating liquid sprayed by the dehumidification part falls into the flow guide layer and is collected and discharged for recycling. In this embodiment, the root of the flow guide vane 301 is fixedly connected with the longer rotating shaft 302, the end of the rotating shaft 302 is drivingly connected with the actuator 306 through the transmission mechanism 305, and the transmission mechanism 305 is a gear transmission mechanism or a chain transmission mechanism; the actuator 306 is a servo motor or a stepping motor actuator. Taking the gear transmission mechanism and the servo motor as an example, the servo motor controls the flow guide vane 301 to rotate along the axial direction through the gear transmission assembly, so as to adjust the direction of the V-shaped opening of the flow guide vane.

[0033] As shown in Figure 1 The servo motor controls the flow guide vane 301 to rotate along the radial direction of the tower body through the gear transmission mechanism, the V-shaped opening of each flow guide vane 301 of the lower flow guide layer is adjusted to face directly upward, and the V-shaped opening of each flow guide vane 301 of the upper flow guide layer is adjusted to face directly upward or downward. The V-shaped opening of each flow guide vane 301 of the upper flow guide layer faces directly upward, and the flue gas after passing through the cooling part of the washing tower can freely pass through the upward gas collecting and liquid discharging device without being affected, and the upward flow guide vane can receive the dehumidification circulating liquid falling from the spray of the dehumidification part of the washing tower, and the dehumidification circulating liquid falling through the gap between the adjacent two groups of flow guide vanes is received by the flow guide vane arranged below, so that the dehumidification circulating liquid can be completely received and guided to the inner wall of the washing tower by arranging multiple layers of staggered flow guide layers; the circumferential inner wall of the tower body 1 is located below the flow guide layer and is provided with a flow collecting groove 307, the flow collecting groove 307 is a ring groove structure, and the outer wall of the tower body 1 is provided with a backflow port 308 connected with the flow collecting groove, the flow guide layer receives and guides the dehumidification circulating liquid to the inner wall of the washing tower to flow downward into the flow collecting groove for collection, and the dehumidification circulating liquid stored in the flow collecting groove is discharged from the washing tower through the backflow port 308. In this arrangement state of the upward gas collecting and liquid discharging device, the upward gas collecting and liquid discharging device performs the functions of upward gas and liquid collection.

[0034] The servo motor controls the flow guide vane 301 to rotate along the radial direction of the tower body through the gear transmission mechanism, the V-shaped opening of each flow guide vane 301 of the upper flow guide layer is adjusted to face directly upward, and the V-shaped opening of each flow guide vane 301 of the upper flow guide layer is adjusted to face directly upward or downward. The V-shaped opening of each flow guide vane 301 of the upper flow guide layer faces directly upward, and the flue gas after passing through the cooling part of the washing tower can freely pass through the upward gas collecting and liquid discharging device without being affected, and the upward flow guide vane can receive the dehumidification circulating liquid falling from the spray of the dehumidification part of the washing tower, and the dehumidification circulating liquid falling through the gap between the adjacent two groups of flow guide vanes is received by the flow guide vane arranged below, so that the dehumidification circulating liquid can be completely received and guided to the inner wall of the washing tower by arranging multiple layers of staggered flow guide layers; the circumferential inner wall of the tower body 1 is located below the flow guide layer and is provided with a flow collecting groove 307, the flow collecting groove 307 is a ring groove structure, and the outer wall of the tower body 1 is provided with a backflow port 308 connected with the flow collecting groove, the flow guide layer receives and guides the dehumidification circulating liquid to the inner wall of the washing tower to flow downward into the flow collecting groove for collection, and the dehumidification circulating liquid stored in the flow collecting groove is discharged from the washing tower through the backflow port 308. In this arrangement state of the upward gas collecting and liquid discharging device, the upward gas collecting and liquid discharging device performs the functions of upward gas and liquid collection. Figure 6As shown, the V-shaped opening of each guide vane 301 of the lower layer of guide vanes is adjusted to face directly downward, and the V-shaped opening of each guide vane 301 of the upper layer of guide vanes is adjusted to face directly downward, which is the state of realizing the cleaning of the demister of the cooling section. During the falling of the dehumidification circulating liquid sprayed by the spray layer 5 at the top of the dehumidification section, the dehumidification circulating liquid first passes through the dehumidification section filler 4 and then drips downward. Because the V-shaped opening of the guide vane faces downward and the back ridge faces upward, the dehumidification circulating liquid conveniently passes through the gap between the guide vanes of the upper and lower layers of guide vanes in sequence, smoothly passes through the air-lifting liquid collecting device, and continues to fall downward. During the falling of the dehumidification circulating liquid, when the dehumidification circulating liquid passes through the demister of the cooling section, the cleaning of the demister is realized.

[0035] In an embodiment of the present application, as shown in Figure 2 and Figure 4 , the guide vane 301 is a fixed structure, and the V-shaped opening angle α of the guide vane 301 is 60-120°. The V-shaped opening structure of the guide vane with any angle within the range of 60-120° can be selected, for example, the V-shaped opening angle can be selected to be 60°, 90°, or 120°. The root of the guide vane 301 is connected with a rotating shaft 302, and a support shaft sleeve 303 for installing the rotating shaft is arranged on the side wall of the tower body 1. A sealing ring 304 is arranged between the rotating shaft 302 and the support shaft sleeve 303, which does not affect the normal rotation of the rotating shaft in the support shaft sleeve 303. One end of the rotating shaft 302 is connected with a gear transmission mechanism and a servo motor. During operation, the servo motor drives the rotating shaft to rotate through the gear transmission mechanism, thereby realizing the adjustment of the orientation of the V-shaped opening of the guide vane. Preferably, the angle of the guide vane 301 rotating along the rotating shaft is 0-180°, as shown in Figure 1 , the V-shaped opening of the guide vane of the upper layer of guide vanes faces directly upward, and the V-shaped opening of the guide vane of the lower layer of guide vanes faces directly upward. When the V-shaped opening of the guide vane of the upper layer of guide vanes is rotated by 45°, the state shown in Figure 7 is reached. When the V-shaped opening of the guide vane of the lower layer of guide vanes is rotated by 45°, the state shown in Figure 1 is reached. When the V-shaped opening of the guide vane of the upper layer of guide vanes is rotated by 180°, the state shown in Figure 8 is reached. When the V-shaped opening of the guide vane of the lower layer of guide vanes is rotated by 180°, the state shown in Figure 1 is reached. In the above-mentioned embodiments, the V-shaped openings of the guide vanes of the upper and lower layers of guide vanes all face directly upward, and when the V-shaped openings of the guide vanes of the upper and lower layers of guide vanes are simultaneously rotated by 180°, the state shown in Figure 6 is reached, and the state is the optimal state of the air-lifting liquid collecting device cleaning the demister.

[0036] In another embodiment of the present application, as shown in Figure 3 and Figure 5As shown, the guide vane 301 can adjust the opening structure, and the V-shaped opening included angle of the guide vane 301 is adjusted at 0-120°. The guide vane 301 includes a first guide vane 301a and a second guide vane 301b, the first guide vane 301a is connected with a first rotating shaft 302a at the root, the second guide vane 301b is connected with a second rotating shaft 302b at the root, the second rotating shaft 302b is an annular clamping groove structure opened along the axial direction, and the opening angle of the second rotating shaft is consistent with the maximum V-shaped opening included angle of the guide vane; the first rotating shaft 302a is rotatably clamped in the annular clamping groove of the second rotating shaft 302b. The length of one end of the first rotating shaft 302a is greater than the length of the second rotating shaft 302b on the same side, and the sidewall of the tower body is provided with a first supporting shaft sleeve 303a supporting the first rotating shaft, and a first sealing ring 304a is arranged between the first bearing and the first supporting shaft sleeve; the length of the other end of the second rotating shaft 302b is greater than the length of the first rotating shaft 302a on the same side, and the sidewall of the tower body is provided with a second supporting shaft sleeve 303b supporting the second rotating shaft 302b, and a second sealing ring 304b is arranged between the second rotating shaft and the second supporting shaft sleeve; the first rotating shaft 302a is drivingly connected with a first actuator 306a through a first transmission mechanism 305a; the second rotating shaft 302b is drivingly connected with a second actuator 306b through a second transmission mechanism 305b. The first transmission mechanism and the second transmission mechanism are both gear transmission mechanisms or chain transmission mechanisms, and the first actuator and the second actuator are both servo motors or stepping motors. In operation, the first actuator drives the first rotating shaft to rotate through the first transmission mechanism, thereby adjusting the angle of the first guide vane, the second actuator drives the second rotating shaft to rotate through the second transmission mechanism, thereby adjusting the angle of the second guide vane, and the V-shaped opening included angle between the first guide vane and the second guide vane can be efficiently adjusted by controlling the relative rotation of the first guide vane and the second guide vane. In this embodiment, the guide vane 301 of the adjustable opening structure, when the first guide vane and the second guide vane are in the maximum opening state, the V-shaped opening included angle is 120°, and in this included angle state, the first actuator and the second actuator are coordinated to drive the guide vane to rotate as a whole at an opening included angle of 120°. When the guide vanes in the upper and lower guide layers are in the fixed position state, the first actuator drives the first transmission mechanism to drive the first rotating shaft to rotate, and the second actuator drives the second transmission mechanism to drive the second rotating shaft to rotate, thereby controlling the relative rotation of the first guide vane and the second guide vane, and adjusting the V-shaped opening included angle of the guide vane, such as Figure 9 As shown, the V-shaped opening included angle of the guide vanes of the lower guide layer is in the open state, and the included angle between the first guide vane and the second guide vane of the upper guide layer is reduced; as Figure 10As shown, the included angle between the first guide vane and the second guide vane of the guide vane of the upper layer and the lower layer is completely closed, in this state, the gap between the guide vanes of the guide layer is in the maximum state, thereby the dehumidification circulating liquid is maximally passed downward through the air-lifting liquid collecting device, and the demister of the cooling part is sufficiently cleaned.

[0037] In an optional embodiment, as shown in Figure 2 or Figure 3 As shown, the guide layer in the tower body 1 is correspondingly provided with a support beam 309, the support beam 309 is arranged in a direction perpendicular to the guide vane 301, and the guide layer and the support beam are arranged to meet the free rotation of the guide vane 301, so as to avoid interference, for example, the support beam and the guide vane are connected in a hoisting manner. Specifically, each layer of the support beam 309 includes two horizontally arranged support beams, the support beam can form a certain support for the guide layer, so as to ensure the structural strength and improve the safety and reliability of operation.

[0038] The working method or working principle of the application is as follows:

[0039] The air-lifting liquid collecting device is applied to the cleaning method of the demister of the cooling part of the washing tower. First, the actuator 306 controls the guide vane 301 to rotate along the radial direction of the tower body through the transmission mechanism 305, adjusts the V-shaped opening of each guide vane 301 of the lower guide layer to face directly upward, adjusts the V-shaped opening of each guide vane 301 of the upper guide layer to face directly upward or directly downward, and the air-lifting liquid collecting device performs the air-lifting and liquid collecting function in this state. Second, if it is necessary to clean the demister 2 of the cooling part, the actuator 306 and the transmission mechanism 305 are controlled to rotate each guide vane 301 of the upper guide layer or the lower guide layer, change the V-shaped opening of the guide vane 301 to face sideways or downward, so that the circulating liquid passes through the air-lifting liquid collecting device to clean the demister of the cooling part. Finally, after the cleaning operation of the demister 2 of the cooling part is completed, the actuator 306 drives the transmission mechanism 305 to drive the upper guide layer and the lower guide layer to reset to the step state.

[0040] In the cleaning process of the cooling part demister, if the guide vane 301 with adjustable opening structure is used, the first guide vane 301a and the second guide vane 301b can be controlled to rotate 0~α / 2° in opposite directions respectively through the first transmission mechanism 305a and the first actuating mechanism 306a matched with the first rotating shaft 302a, and the second transmission mechanism 305b and the second actuating mechanism 306b matched with the second rotating shaft 302b. The relative rotation angle of the first guide vane 301a and the second guide vane 301b is limited by the V-shaped opening included angle of the guide vane 301. For example, if α is 120°, the relative rotation angle of the first guide vane 301a and the second guide vane 301b is 0~60°. The relative rotation of the first guide vane 301a and the second guide vane 301b reduces the V-shaped opening included angle, thereby increasing the gap width between the adjacent two groups of guide vanes, so as to facilitate the dehumidification circulating liquid to pass through the rising vapor liquid collecting device and efficiently clean the cooling part demister.

[0041] The above is the preferred embodiment of the present application. It should be pointed out that for ordinary skilled in the art, without departing from the principles of the present application, a number of improvements and refinements can be made, which should also be considered as the protection scope of the present application.

Claims

1. A method for cleaning a mist eliminator of a scrubbing tower, the scrubbing tower comprising a tower body (1) and, in order from bottom to top inside the tower body, a cooling section mist eliminator (2), a gas-lifting liquid collecting device (3), a dehumidifying section filler (4), and a dehumidifying section spray layer (5), characterized in that, The ascending gas and liquid collecting device (3) comprises at least two layers of guide layers arranged along the height direction of the tower body, the guide layers comprise a plurality of groups of guide vanes (301) arranged at equal intervals along the radial direction of the tower body, the guide vanes (301) are of V-shaped structure, gaps are arranged between adjacent two groups of guide vanes (301), and the guide vanes (301) of the upper and lower adjacent two layers of guide layers are arranged in a staggered manner; the end of the guide vane (301) is in transmission connection with an actuating mechanism (306) through a transmission mechanism (305), the actuating mechanism (306) controls the guide vane (301) to rotate along the axial direction and adjusts the opening direction or opening angle of the guide vane through the transmission mechanism (305); a flow collecting groove (307) is arranged below the guide layer on the circumferential inner wall of the tower body (1), and a backflow port (308) connected with the flow collecting groove is arranged on the outer wall of the tower body (1); The cleaning steps of the ascending gas and liquid collecting device (3) are as follows: Step 1: the actuating mechanism (306) controls the guide vanes (301) to rotate along the radial direction of the tower body through the transmission mechanism (305), and the V-shaped opening of each guide vane (301) of the lower guide layer is adjusted to face the directly upward direction; the V-shaped opening of each guide vane (301) of the upper guide layer is adjusted to face the directly upward direction or the directly downward direction, and the ascending gas and liquid collecting device performs the functions of ascending gas and collecting liquid in this state; Step 2: when the cooling part demister (2) needs to be cleaned, the guide vanes (301) of the upper guide layer or the lower guide layer are controlled to rotate through the actuating mechanism (306) and the transmission mechanism (305), the opening direction of the guide vanes (301) is changed, and the dehumidification circulating liquid passes through the ascending gas and liquid collecting device (3) to clean the cooling part demister (2); Step 3: after the cleaning of the cooling part demister (2) is completed, the actuating mechanism (306) drives the transmission mechanism (305) to drive the upper guide layer and the lower guide layer to reset to the state of step 1.

2. The method of claim 1, wherein the washing tower mist eliminator is a wire mesh mist eliminator. The guide vane (301) is of fixed structure, and the V-shaped opening angle α of the guide vane (301) is 60-120°.

3. The method of claim 2, wherein the cleaning fluid is introduced into the wash column mist eliminator at a rate of from about 0.1 to about 10 gallons per minute per 1000 square feet of mist eliminator surface area. The guide vane (301) is connected with a rotating shaft (302) at the root, a support shaft sleeve (303) for mounting the rotating shaft is arranged on the side wall of the tower body (1), and one end of the rotating shaft (302) is connected with the transmission mechanism (305).

4. The method of claim 1 wherein, The guide vane (301) is of adjustable opening structure, and the V-shaped opening angle α of the guide vane (301) is adjustable within 0-120°.

5. The method of claim 4, wherein the cleaning fluid is water. The guide vane (301) comprises a first guide vane (301a) and a second guide vane (301b), the first guide vane (301a) is connected with a first rotating shaft (302a) at the root, the second guide vane (301b) is connected with a second rotating shaft (302b) at the root, the second rotating shaft (302b) is of annular clamping groove structure with an opening along the axial direction, and the opening angle of the second rotating shaft is consistent with the maximum V-shaped opening angle of the guide vane; the first rotating shaft (302a) is clamped in the annular clamping groove of the second rotating shaft (302b).

6. The method of claim 5, wherein the cleaning fluid is introduced into the wash column mist eliminator at a rate of about 0.1 to about 0.5 gallons per minute per 1000 square feet of mist eliminator surface area. The first rotating shaft (302a) has one end with a length greater than that of the second rotating shaft (302b) on the same side, and the side wall of the tower body is provided with a first support shaft sleeve (303a) supporting the first rotating shaft; the second rotating shaft (302b) has the other end with a length greater than that of the first rotating shaft (302a) on the same side, and the side wall of the tower body is provided with a second support shaft sleeve (303b) supporting the second rotating shaft (302b); the first rotating shaft (302a) is in transmission connection with the first executing mechanism (306a) through the first transmission mechanism (305a); and the second rotating shaft (302b) is in transmission connection with the second executing mechanism (306b) through the second transmission mechanism (305b).

7. The method of claim 1 wherein, The tower body (1) is provided with a support beam (309) corresponding to the flow guiding layer, and the support beam (309) is arranged perpendicularly to the flow guiding blade (301).

8. The method of claim 1 wherein, The transmission mechanism (305) is a gear transmission mechanism or a chain transmission mechanism; and the executing mechanism (306) is a servo motor or a stepping motor.

9. The method of claim 6 wherein, When the flow guiding blade (301) with an adjustable opening structure is used, in step 2, the first flow guiding blade (301a) and the second flow guiding blade (301b) are respectively controlled to rotate 0-α / 2° to the opposite directions by the first transmission mechanism (305a) and the first executing mechanism (306a) arranged in cooperation with the first rotating shaft (302a) and the second transmission mechanism (305b) and the second executing mechanism (306b) arranged in cooperation with the second rotating shaft (302b), so as to change the opening included angle of the flow guiding blade.

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