Online tower bottom blockage cleaning system and online tower bottom blockage cleaning method

Abstract

According to the tower bottom blockage online cleaning system and method, in the blow-down process of a quench tower, when a first flow sensor monitors that the inlet flow of a rotary hydraulic pump is lower than a set value, operation of the rotary hydraulic pump is stopped, a first electric gate valve is closed, and a second electric gate valve and a temporary blow-down valve are opened; the dredging device is rotated to the side away from the rotary hydraulic pump; then a high-pressure water gun of the dredging device extends into the pollution discharge pipeline through a connecting pipe to spray water and dredge, and the dredged sewage is discharged; when a first flow sensor monitors that the inlet flow of the rotary hydraulic pump is higher than a set value, a high-pressure water gun of the dredging device is withdrawn into the connecting pipe from the blow-off pipeline, then a third electric gate valve is closed, a first electric gate valve is opened, and the dredging device is rotated to the side close to the rotary hydraulic pump; and then a high-pressure water gun extends into a sewage draining exit of the quench tower through a sewage draining pipeline for dredging, and the dredged sewage is continuously discharged.

Description

Technical Field

[0001] The present invention relates to the technical field of blockage clearing, and in particular to an online tower bottom blockage clearing system and an online cleaning system method. Background Art

[0002] Coal-to-olefins is an important chemical process that uses coal resources to synthesize methanol through a series of chemical reactions, and then produces olefin products such as ethylene and propylene from methanol. The quench tower is a key equipment in the methanol-to-olefins process, used to wash the small amount of catalyst fines carried in the olefin product gas and reduce the temperature of the product gas.

[0003] A plurality of herringbone baffles are arranged at intervals on the upper part of the quenching tower, and the bottom of the tower is divided into a clear liquid area and a cyclone area by the baffles. The quenching water flows into the cyclone area after passing through the herringbone baffles. A large amount of catalyst fine powder washed in the quenching tower and scale fallen off the tower plate are deposited in the cyclone area, and the scale is pumped out from the sewage pipeline by the cyclone pump; when the liquid level in the cyclone area exceeds the baffle, the quenching water overflows into the clear liquid area and is discharged through the liquid outlet of the clear liquid area; in the long-term operation process, as the accumulation increases, the sewage outlet, sewage pipeline and filter on the sewage pipeline of the cyclone area will be blocked, the sedimentation space of the cyclone area in the tower will continue to decrease, and the accumulation in the cyclone area may be brought to the clear liquid area and discharged from the liquid outlet of the clear liquid area, which will cause the liquid outlet of the clear liquid area to be blocked, making the quenching tower unable to operate normally and have to be shut down for treatment.

[0004] During downtime, the current method for clearing the blockage is to shut down the plant, remove the valve at the inlet of the tower's cyclone pump, and use high-pressure water cleaning to remove impurities from the sewage line. However, this downtime for maintenance can cause significant economic losses. Furthermore, removing the valve at the inlet of the tower's cyclone pump can lead to uncontrolled outflow of the medium, potentially causing burns. Furthermore, once the blockage is cleared, the high-temperature, flammable, and explosive ethylene and propylene gases within the tower could leak out, posing a dangerous risk. Summary of the Invention

[0005] The first object of the present invention is to provide an online cleaning system for tower bottom blockage to solve the problems existing in the prior art.

[0006] The second object of the present invention is to provide an online cleaning method for tower bottom blockage.

[0007] The first object of the present invention is implemented by the following technical solution: an online cleaning system for tower bottom blockage, comprising a hydrocyclone pump, wherein the inlet of the hydrocyclone pump is connected to the sewage outlet of a quenching tower through a sewage pipeline, a filter is provided on the sewage pipeline near the inlet of the hydrocyclone pump, a first electric gate valve is provided at the sewage outlet of the quenching tower, a connecting pipe is connected to the sewage pipeline, a second electric gate valve is provided on the connecting pipe, a third electric gate valve is installed on the sewage pipeline between the connecting pipe and the filter, a temporary pipeline is connected to the sewage pipeline between the connecting pipe and the third electric gate valve, and a temporary sewage valve is provided on the temporary pipeline; A dredging device is rotatably connected to the end of the connecting pipe through a rotary joint, and a high-pressure water gun of the dredging device extends through the connecting pipe into the sewage pipeline; A first flow sensor is provided at the inlet of the hydrocyclone pump, a second flow sensor is provided on the temporary pipeline on the outlet side of the temporary drain valve, and an alarm is installed on the outer wall of the quenching tower. The first flow sensor and the second flow sensor are respectively electrically connected to the signal input end of the controller, and the signal output end of the controller is electrically connected to the alarm.

[0008] Preferably, the dredging device includes a rotating inclined tube, a slag discharge chamber, a sealing chamber, an end cover, a throttling guide sleeve, a limiting screw, a sealing packing, a packing gland and the high-pressure water gun; The end of the connecting pipe is connected to the top of the rotating inclined pipe via the rotating joint, and the bottom end of the rotating inclined pipe and the top of the slag discharge chamber, as well as the bottom end of the slag discharge chamber and the top of the sealing chamber are detachably connected via connecting flanges; A slag-blocking rubber pad is sandwiched between two adjacent flanges, and a through hole is opened in the middle of the slag-blocking rubber pad; A flushing port is provided on the top side wall of the slag discharge chamber, and a flushing valve is provided at the flushing port; a slag discharge port is provided on the bottom side wall of the slag discharge chamber, and a slag discharge valve is provided at the slag discharge port; a sealing water port is provided on the bottom side wall of the sealing chamber, and a sealing water valve is provided at the sealing water port; The end cover with a central opening is fixed at the bottom end of the sealing chamber, a plurality of limit screws are vertically and evenly distributed outside the end cover, the throttling guide sleeve is installed between the plurality of limit screws, the guide flange of the throttling guide sleeve is movably sleeved on the plurality of limit screws, nuts are screwed on the limit screws above and below the guide flange, and the end of the guide tube of the throttling guide sleeve passes through the central hole of the end cover and extends into the sealing chamber; The outer side of the guide tube in the sealing chamber is sealed and filled with the sealing filler; the filler gland sleeved outside the guide tube of the throttling guide sleeve is screwed on the inner wall of the sealing chamber, and the filler gland presses the sealing filler onto the end cover; A high-pressure water gun is movably provided in the guide pipe and can sequentially pass through the sealing chamber, the slag discharge chamber, the rotating inclined pipe, the rotating joint, and the connecting pipe to extend into the sewage discharge pipeline.

[0009] Preferably, the throttling guide sleeve includes the guide flange and the guide tube which are integrally formed. A center hole is formed on the guide flange, and the guide tube is fixedly connected to the center hole of the guide flange.

[0010] Preferably, an elastic rubber sleeve is provided on the outer sleeve of the guide tube, and the elastic rubber sleeve is a flexible reducer structure. The small diameter end of the elastic rubber sleeve is sealed with the guide tube, and the outer edge of the large diameter end of the elastic rubber sleeve is pressed onto the sealing filler through the filler gland.

[0011] Preferably, the high-pressure water gun includes a cleaning pipe movably arranged in the guide pipe and a cleaning gun head rotatably connected to the end of the cleaning pipe, a front injection port connected to the interior of the cleaning gun head is provided in front of the cleaning gun head, and several rear injection ports connected to the interior of the cleaning gun head are provided at the rear of the cleaning gun head.

[0012] The second object of the present invention is implemented by the following technical solution: an online cleaning method for tower bottom blockage, comprising the following steps: S1: When the quench tower needs to be drained, close the second electric gate valve and the temporary drain valve, open the first electric gate valve and the third electric gate valve, start the hydrocyclone pump, and pump out the sewage discharged from the drain outlet at the bottom of the quench tower through the hydrocyclone pump; S2: During step S1, when the first flow sensor detects that the inlet flow rate of the hydrocyclone pump is lower than the set value, the alarm sounds, the operator stops the hydrocyclone pump, closes the first electric gate valve, opens the second electric gate valve and the temporary sewage valve, and moves the dredging device to the side away from the hydrocyclone pump; then, the high-pressure water gun of the dredging device is extended through the connecting pipe into the sewage pipeline between the connecting pipe and the hydrocyclone pump to spray water for dredging, and the dredged scale and water enter the temporary pipeline through the sewage pipeline and are discharged; S3: When the operator observes that no scale is discharged from the outlet of the temporary pipeline, first withdraw the high-pressure water gun of the dredging device from the sewage pipeline and the connecting pipe, then close the third electric gate valve, open the first electric gate valve, and turn the dredging device to the side close to the hydrocyclone pump; then extend the high-pressure water gun of the dredging device through the connecting pipe, the sewage pipeline between the connecting pipe and the sewage outlet of the quenching tower, and into the sewage outlet of the quenching tower to spray water for dredging. The dredged scale and water enter the temporary pipeline through the sewage pipeline and are then discharged; S4: When the second flow sensor detects that the sewage flow in the temporary pipeline reaches the set value, the alarm sounds, and the operator retracts the high-pressure water gun of the dredging device into the sealed room, and then closes the second electric gate valve and the temporary sewage valve to complete the dredging; then opens the third electric gate valve and repeats the process of S1 to continue sewage discharge.

[0013] Preferably, in step S2, the high-pressure water gun of the dredging device is extended into the sewage pipeline through the connecting pipe to spray water for dredging. The specific process is as follows: S2-1: First, open the sealing water valve and continuously inject water into the sealing chamber until the sealing chamber and the slag discharge chamber are filled with water to form a liquid seal; S2-2: Then put the high-pressure water gun of the dredging device through the rotary joint and the connecting pipe in turn into the sewage pipeline to spray water for dredging.

[0014] Preferably, in steps S2 and S3, during the process of water spraying and dredging by the high-pressure water gun of the dredging device, flushing water is introduced into the slag discharge chamber of the dredging device through the flushing port, and impurities entering the slag discharge chamber of the dredging device are flushed and then discharged from the slag discharge port.

[0015] Preferably, in step S4, after the dredging is completed, the injection of water into the sealed chamber is stopped, the connection between the sealed water outlet and the water source is disconnected, and the water in the slag discharge chamber and the sealed chamber is discharged through the sealed water outlet.

[0016] The advantages of the present invention are as follows: first, the first flow sensor and the second flow sensor cooperate to transmit signals to the controller, the controller controls the alarm to sound an alarm, and the operator controls the start and stop of the rotary pump, the opening and closing of the first electric gate valve, the second electric gate valve and the temporary sewage valve; when the first flow sensor detects that the inlet flow of the rotary pump is lower than the set value, the operator controls the relevant valves and the rotary pump to move, and turns the dredging device to the side away from the rotary pump, so that the high-pressure water gun is extended into the sewage pipeline through the connecting pipe to spray water to dredge. After the dredging, the scale and water enter the temporary pipeline through the sewage pipeline. Discharge; When the operator observes that no scale is discharged from the outlet of the temporary pipeline, first retract the high-pressure water gun of the dredging device from the sewage pipeline into the connecting pipe, then turn the dredging device to the side close to the hydrocyclone pump, so that the high-pressure water gun passes through the sewage pipeline into the sewage outlet of the quenching tower for dredging. The dredged scale and water enter the temporary pipeline through the sewage pipeline and are discharged; When the second flow sensor detects that the sewage flow in the temporary pipeline reaches the set value, the high-pressure water gun of the dredging device is retracted into the rotating inclined pipe, and the relevant valves and hydrocyclone pumps are controlled to end the dredging, and the quenching tower resumes normal sewage discharge. There is no need to remove the valve at the inlet of the hydrocyclone pump at the bottom of the tower, and online cleaning can be achieved without maintenance, thereby ensuring normal production. The entire dredging process can be achieved in a closed manner, which can eliminate the safety hazards caused by large-scale leakage of materials in the quenching tower due to disassembly of equipment.

[0017] Secondly, the present invention is provided with a connecting pipe on the sewage pipeline, and a dredging device is rotatably connected to the end of the connecting pipe through a rotary joint. The dredging device includes a rotating inclined pipe, a slag discharge chamber, a sealing chamber, an end cover, a throttling guide sleeve, a limiting screw, a sealing filler, a filler gland and the high-pressure water gun; the dredging device can be rotated through the rotary joint to realize the redirection of the high-pressure water gun in the sewage pipeline, and comprehensively dredge the sewage outlet, sewage pipeline and filter of the quenching tower, and inject low-temperature non-aqueous liquid with a pressure higher than the medium pressure into the slag discharge chamber and the sealing chamber of the dredging device. The harmful medium is used as sealing water to form a high-pressure liquid seal, which prevents the uncontrolled outflow of high-temperature medium in the tower from causing burns to personnel and prevents the leakage of ethylene and propylene gas in the tower; in addition, the use of a throttling guide sleeve and the filling of sealing fillers between the outside of the guide tube of the throttling guide sleeve and the inner wall of the sealing chamber can reduce the leakage of sealing water. The sealing chamber, sealing fillers, throttling guide sleeve and high-pressure water gun are used together to achieve a good sealing effect, forming a multi-level protection. The leakage is in the form of drops, which will not cause environmental pollution or burns to personnel, and can effectively ensure the safe and smooth progress of online cleaning operations. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0019] Figure 2 for Figure 1 A partial enlarged view of middle A.

[0020] Figure 3 for Figure 1 A partial enlarged view of B.

[0021] Figure 4 It is a structural diagram of the slag-blocking rubber pad.

[0022] Figure 5 This is a schematic diagram of the status after adjusting the position of the throttling guide sleeve.

[0023] Figure 6 Schematic diagram of the structure of the cleaning gun tip.

[0024] Figure 7 Schematic diagram of the control principle of the present invention.

[0025] In the figure: quenching tower 1, sewage outlet 1.1, sewage pipeline 2, hydrocyclone pump 3, connecting pipe 4, first electric gate valve 5, second electric gate valve 6, third electric gate valve 7, temporary pipeline 8, temporary sewage valve 9, rotary joint 10, dredging device 11, rotary inclined pipe 12, slag discharge chamber 13, flushing valve 14, slag discharge valve 15, sealing chamber 16, sealing water valve 17, slag blocking rubber pad 18, slag blocking sheet 18.1, end cover 19, limiting screw 20, throttling guide sleeve 21, guide flange 21.1, guide pipe 21.2, nut 22, high-pressure water gun 23, cleaning pipe 23.1, cleaning gun head 23.2, front injection port 23.2.1, rear injection port 23.2.2, sealing packing 24, packing gland 25, elastic rubber sleeve 26, first flow sensor 27, second flow sensor 28, controller 29, alarm 30. DETAILED DESCRIPTION

[0026] The following will provide a clear and complete description of the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0027] Example 1: Figure 1-Figure 7 As shown, an online cleaning system for tower bottom blockage includes a hydrocyclone pump 3, the inlet of the hydrocyclone pump 3 is connected to the sewage outlet 1.1 of the quenching tower 1 through a sewage pipeline 2, a filter 31 is provided on the sewage pipeline 2 near the inlet of the hydrocyclone pump 3, a first electric gate valve 5 is provided at the sewage outlet 1.1 of the quenching tower 1, a connecting pipe 4 is connected to the sewage pipeline 2, a second electric gate valve 6 is provided on the connecting pipe 4, a third electric gate valve 7 is installed on the sewage pipeline 2 between the connecting pipe 4 and the filter 31, and a temporary pipeline 8 is connected to the sewage pipeline 2 between the connecting pipe 4 and the third electric gate valve 7, and a temporary sewage valve 9 is provided on the temporary pipeline 8; The end of the connecting pipe 4 is connected to a dredging device 11 by rotating a rotary joint 10. The high-pressure water gun 23 of the dredging device 11 passes through the rotary joint 10 and the connecting pipe 4 and extends into the sewage pipeline 2. The operator rotates the dredging device 11 to change the direction of the high-pressure water gun 23 in the sewage pipeline 2. The dredging device 11 includes a rotating inclined tube 12, a slag discharge chamber 13, a sealing chamber 16, and a high-pressure water gun 23. The end of the connecting pipe 4 is connected to the top of the rotating inclined tube 12 via a rotating joint 10. The bottom end of the rotating inclined tube 12 and the top of the slag discharge chamber 13, as well as the bottom end of the slag discharge chamber 13 and the top of the sealing chamber 16 are detachably connected via flanges. A slag-blocking rubber pad 18 is sandwiched between two adjacent flanges. A through-hole is provided in the middle of the slag-blocking rubber pad 18. Slag-blocking sheets 18.1 extending toward the center are provided around the through-hole. The slag-blocking sheets 18.1 are made of a flexible material. The use of the slag-blocking rubber pad 18 can reduce the entry of impurities into the slag discharge chamber 13 and the sealing chamber 16. Under the influence of the pressure of the sealing water, each slag-blocking sheet 18.1 opens from the high-pressure side to the low-pressure side, facilitating the passage of the cleaning gun head 23.2. At the same time, the flux of the slag discharge chamber 13 and the sealing chamber 16 is limited, thereby improving the sealing effect of the sealing water. A flushing port is provided on the top side wall of the slag discharge chamber 13, and a flushing valve 14 is provided at the flushing port. A slag discharge port is opened on the bottom side wall of the slag discharge chamber 13, and a slag discharge valve 15 is provided at the slag discharge port. During the clearing process, a small amount of impurities will enter the slag discharge chamber 13. In order to prevent the accumulation of impurities in the slag discharge chamber 13 and affect the subsequent sealing, the flushing valve 14 and the slag discharge valve 15 are always kept open during the clearing process, so that the flushing water flushes the slag discharge valve 15. After flushing, the impurities are discharged through the slag discharge port. A sealing water inlet is provided on the bottom side wall of the sealing chamber 16, and a sealing water valve 17 is provided at the sealing water inlet. A low-temperature harmless medium with a pressure higher than that of the medium is used as sealing water in the sealing chamber 16. The temperature of the sealing water is close to room temperature. Even if there is a slight leakage, it will not affect the operating personnel. Water is injected into the sealing chamber 16 through the sealing water inlet to form a high-pressure liquid seal, thereby preventing the leakage of high-temperature scale liquid generated during the clearing process and causing burns to personnel. An end cover 19 with a central opening is fixed at the bottom end of the sealing chamber 16. A plurality of limit screws 20 are vertically and evenly distributed outside the end cover 19. A throttling guide sleeve 21 is installed between the plurality of limit screws 20. The throttling guide sleeve 21 includes an integrally formed guide flange 21.1 and a guide tube 21.2. The guide flange 21.1 is provided with a central hole. A guide tube 21.2 is fixedly connected to the central hole of the guide flange 21.1. The guide flange 21.1 is movably sleeved on the plurality of limit screws 20. Nuts 22 are respectively screwed on each of the limit screws 20 above and below the guide flange 21.1. The ends of the guide tubes 21.2 pass through the central hole of the end cover 19 and extend into the sealing chamber 16. The nuts 22 cooperate with the limit screws 20 to limit the throttling guide sleeve 21, thereby preventing the throttling guide sleeve 21 from rotating relative to the sealing packing 24 due to the swinging of the high-pressure water gun 23, thereby affecting the sealing effect. The outer periphery of the guide tube 21.2 of the throttling guide sleeve 21 in the sealing chamber 16 is sealed and filled with a sealing packing 24. A packing gland 25, which is sleeved on the outer surface of the guide tube 21.2, is screwed onto the inner wall of the sealing chamber 16. The packing gland 25 presses the sealing packing 24 against the end cover 19. The provision of the packing gland 25 and the sealing packing 24 can reduce the leakage of sealing water from the central hole of the end cover 19. An elastic rubber sleeve 26 is provided on the outer surface of the guide tube 21.2. The elastic rubber sleeve 26 is a flexible reducer structure. The small diameter end of the elastic rubber sleeve 26 is sealingly connected to the guide tube 21.2. The outer edge of the large diameter end of the elastic rubber sleeve 26 is pressed against the sealing packing 24 through the packing gland 25. The provision of the elastic rubber sleeve 26 can prevent the sealing water from leaking along the gap between the guide tube 21.2 and the sealing packing 24 due to the swinging of the throttling guide sleeve 21. A high-pressure water gun 23 is movably disposed within the guide tube 21.2 of the throttling guide sleeve 21 and is capable of sequentially passing through the sealing chamber 16, the slag discharge chamber 13, the rotating inclined tube 12, the rotary joint 10, and the connecting tube 4 to extend into the sewage discharge pipeline 2. The high-pressure water gun 23 comprises a cleaning pipe 23.1 movably disposed within the guide tube 21.2 and a cleaning gun head 23.2 rotatably connected to the end of the cleaning pipe 23.1. A front injection port 23.2.1 communicating with the interior of the cleaning gun head 23.2 is disposed in front of the cleaning gun head 23.2, and a plurality of rear injection ports 23.2.2 communicating with the interior of the cleaning gun head 23.2 are disposed in rear of the cleaning gun head 23.2. The rotatable cleaning gun head 23.2, which simultaneously ejects water from the front and rear, can clear dirt clogged in the drain outlet 1.1, drain line 2, and filter 31 of the cyclone area. The throttling guide sleeve 21 and high-pressure water gun 23 are designed to work together to reduce sealing water leakage and ensure a good seal. This also reduces the risk of jamming between the cleaning pipe 23.1 and the throttling guide sleeve 21 caused by the high-pressure jet of the cleaning gun head 23.2 whipping around in the drain line 2. Furthermore, the throttling guide sleeve 21 prevents media leakage caused by the high-pressure water gun 23 being withdrawn due to misoperation. A first flow sensor 27 is provided at the inlet of the hydrocyclone pump 3, and the sewage flow at the inlet of the hydrocyclone pump 3 is monitored by the first flow sensor 27. A second flow sensor 28 is provided on the temporary pipeline 8 on the outlet side of the temporary sewage valve 9, and the sewage flow on the outlet side of the temporary sewage valve 9 is monitored by the second flow sensor 28. An alarm 30 is installed on the outer wall of the quenching tower 1. The first flow sensor 27 and the second flow sensor 28 are electrically connected to the signal input end of the controller 29, respectively, and the signal output end of the controller 29 is electrically connected to the alarm 30. When the first flow sensor 27 detects that the inlet flow of the hydrocyclone pump 3 is lower than the set value, the alarm 30 issues a warning prompt, and the operator stops the operation of the hydrocyclone pump 3, closes the first electric gate valve 5, and opens the second electric gate valve 6 and the temporary sewage valve 9; when the second flow sensor 28 detects that the sewage flow in the temporary pipeline reaches the set value, the alarm sounds an alarm, and the operator retracts the high-pressure water gun of the dredging device into the sealed chamber and closes the second electric gate valve and the temporary sewage valve.

[0028] Example 2: Figure 1-Figure 7 As shown, an online method for cleaning tower bottom blockage using an online cleaning system for tower bottom blockage described in Example 1 comprises the following steps: S1: When the quenching tower 1 needs to be discharged, close the second electric gate valve 6 and the temporary drain valve 9, and close the flushing valve 14 and the slag discharge valve 15. Open the first electric gate valve 5 and the third electric gate valve 7, start the hydrocyclone pump 3, and pump out the sewage discharged from the drain port 1.1 of the quenching tower 1 through the hydrocyclone pump 3; S2: During step S1, when the first flow sensor 27 detects that the inlet flow rate of the hydrocyclone pump 3 is lower than 250t / h, the first flow sensor 27 transmits the flow signal to the controller 29, and the controller 29 controls the alarm 30 to sound an alarm. The operator controls the hydrocyclone pump 3 to stop running, close the first electric gate valve 5, open the second electric gate valve 6 and the temporary sewage valve 9, and turn the dredging device 11 to the side away from the hydrocyclone pump 3; then open the sealing water valve 17, and continuously inject water into the sealing chamber 16 through the sealing water inlet until the sealing chamber 16 and the slag discharge chamber 13 are filled with water to form a high-pressure liquid seal; then the high-pressure water gun 23 of the dredging device 11 is extended into the sewage pipeline 2 between the connecting pipe 4 and the hydrocyclone pump 3 through the rotary joint 10 and the connecting pipe 4 to spray water to dredge. The scale and water after dredging enter the temporary pipeline 8 through the sewage pipeline 2 and are discharged to the sewage pool; S3: When the operator observes that no scale is discharged from the outlet of the temporary pipeline 8, the operator first withdraws the high-pressure water gun 23 of the dredging device 11 from the sewage pipeline 2 and the connecting pipe 4, then closes the third electric gate valve 7, opens the first electric gate valve 5, and turns the dredging device 11 to the side close to the hydrocyclone pump 3; then the high-pressure water gun 23 is extended into the sewage outlet 1.1 of the quenching tower 1 through the connecting pipe 4 and the sewage pipeline 2 between the connecting pipe 4 and the sewage outlet 1.1 of the quenching tower 1 to dredge the sewage. The dredged sewage enters the temporary pipeline 8 through the sewage pipeline 2 and is then discharged; In steps S2 and S3, when the high-pressure water gun 23 of the dredging device 11 is spraying water for dredging, the flushing valve 14 and the slag discharge valve 15 are always opened, and flushing water is introduced into the slag discharge chamber 13 of the dredging device 11 through the flushing port. The impurities in the slag discharge chamber 13 of the dredging device 11 are flushed and discharged from the slag discharge port.

[0029] S4: When the second flow sensor 28 detects that the sewage flow in the temporary pipeline 8 exceeds 250t / h, the alarm sounds, and the operator first retracts the high-pressure water gun 23 of the dredging device 11 into the sealed chamber 16, and then closes the second electric gate valve 6 and the temporary sewage valve 9 to end the dredging; then opens the third electric gate valve 7 and repeats the process of S1; finally, after the dredging is completed, the connection between the sealed water outlet and the water source is disconnected, and the injection of water into the sealed chamber 16 is stopped, so that the water in the slag discharge chamber 13 and the sealed chamber 16 is discharged from the sealed water outlet.

[0030] In the description of the present invention, it should be noted that the terms "center", "up", "down", "front", "back", "top", "bottom", "left", "right", "vertical", "horizontal", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention.

[0031] The above is only a preferred specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with this technical field, within the technical scope disclosed by the present invention, who makes equivalent replacements or changes based on the technical solutions and inventive concepts of the present invention, should be covered by the scope of protection of the present invention.

Claims

1. An online cleaning system for tower bottom blockage, comprising a hydrocyclone pump, the inlet of which is connected to the sewage outlet of the quenching tower through a sewage pipeline, and a filter is provided on the sewage pipeline near the inlet of the hydrocyclone pump, characterized in that: A first electric gate valve is provided at the sewage outlet of the quenching tower, a connecting pipe is connected to the sewage pipeline, a second electric gate valve is provided on the connecting pipe, a third electric gate valve is installed on the sewage pipeline between the connecting pipe and the filter, a temporary pipeline is connected to the sewage pipeline between the connecting pipe and the third electric gate valve, and a temporary sewage valve is provided on the temporary pipeline; A dredging device is rotatably connected to the end of the connecting pipe through a rotary joint, and a high-pressure water gun of the dredging device passes through the connecting pipe and extends into the sewage pipeline; A first flow sensor is provided at the inlet of the hydrocyclone pump, a second flow sensor is provided on the temporary pipeline on the outlet side of the temporary drain valve, and an alarm is installed on the outer wall of the quenching tower. The first flow sensor and the second flow sensor are respectively electrically connected to the signal input end of the controller, and the signal output end of the controller is electrically connected to the alarm.

2. The online cleaning system for tower bottom blockage according to claim 1, characterized in that: The dredging device includes a rotating inclined pipe, a slag discharge chamber, a sealing chamber, an end cover, a throttling guide sleeve, a limiting screw, a sealing filler, a filler gland and the high-pressure water gun; The end of the connecting pipe is connected to the top of the rotating inclined pipe via the rotating joint, and the bottom end of the rotating inclined pipe and the top of the slag discharge chamber, as well as the bottom end of the slag discharge chamber and the top of the sealing chamber are detachably connected via connecting flanges; A slag-blocking rubber pad is sandwiched between two adjacent flanges, and a through hole is opened in the middle of the slag-blocking rubber pad; A flushing port is provided on the top side wall of the slag discharge chamber, and a flushing valve is provided at the flushing port; a slag discharge port is provided on the bottom side wall of the slag discharge chamber, and a slag discharge valve is provided at the slag discharge port; a sealing water port is provided on the bottom side wall of the sealing chamber, and a sealing water valve is provided at the sealing water port; The end cover with a central opening is fixed at the bottom end of the sealing chamber, a plurality of limit screws are vertically and evenly distributed outside the end cover, the throttling guide sleeve is installed between the plurality of limit screws, the guide flange of the throttling guide sleeve is movably sleeved on the plurality of limit screws, nuts are screwed on the limit screws above and below the guide flange, and the end of the guide tube of the throttling guide sleeve passes through the central hole of the end cover and extends into the sealing chamber; The outer side of the guide tube in the sealing chamber is sealed and filled with the sealing filler; the filler gland sleeved outside the guide tube of the throttling guide sleeve is screwed on the inner wall of the sealing chamber, and the filler gland presses the sealing filler onto the end cover; A high-pressure water gun is movably provided in the guide pipe and can sequentially pass through the sealing chamber, the slag discharge chamber, the rotating inclined pipe, the rotating joint, and the connecting pipe to extend into the sewage discharge pipeline.

3. The online cleaning system for tower bottom blockage according to claim 2, characterized in that: The throttling guide sleeve includes the guide flange and the guide tube which are integrally formed. A center hole is formed on the guide flange, and the guide tube is fixedly connected to the center hole of the guide flange.

4. The online cleaning system for tower bottom blockage according to claim 2, characterized in that: An elastic rubber sleeve is provided on the outer sleeve of the guide tube. The elastic rubber sleeve is a flexible reducer structure. The small diameter end of the elastic rubber sleeve is sealed with the guide tube, and the outer edge of the large diameter end of the elastic rubber sleeve is pressed against the sealing filler through the filler gland.

5. The online cleaning system for tower bottom blockage according to claim 3, characterized in that: The high-pressure water gun includes a cleaning pipe movably arranged in the guide pipe and a cleaning gun head rotatably connected to the end of the cleaning pipe. A front injection port connected to the interior of the cleaning gun head is provided in front of the cleaning gun head, and a plurality of rear injection ports connected to the interior of the cleaning gun head are provided at the rear of the cleaning gun head.

6. A method for online cleaning of tower bottom blockage using an online cleaning system for tower bottom blockage according to any one of claims 1 to 5, characterized in that: It includes the following steps: S1: When the quench tower needs to be drained, close the second electric gate valve and the temporary drain valve, open the first electric gate valve and the third electric gate valve, start the hydrocyclone pump, and pump out the sewage discharged from the drain outlet at the bottom of the quench tower through the hydrocyclone pump; S2: During step S1, when the first flow sensor detects that the inlet flow rate of the hydrocyclone pump is lower than the set value, the alarm sounds, the operator stops the hydrocyclone pump, closes the first electric gate valve, opens the second electric gate valve and the temporary sewage valve, and moves the dredging device to the side away from the hydrocyclone pump; then, the high-pressure water gun of the dredging device is extended through the connecting pipe into the sewage pipeline between the connecting pipe and the hydrocyclone pump to spray water for dredging, and the dredged scale and water enter the temporary pipeline through the sewage pipeline and are discharged; S3: When the operator observes that no scale is discharged from the outlet of the temporary pipeline, first withdraw the high-pressure water gun of the dredging device from the sewage pipeline and the connecting pipe, then close the third electric gate valve, open the first electric gate valve, and turn the dredging device to the side close to the hydrocyclone pump; then extend the high-pressure water gun of the dredging device through the connecting pipe, the sewage pipeline between the connecting pipe and the sewage outlet of the quenching tower, and into the sewage outlet of the quenching tower to spray water for dredging. The dredged scale and water enter the temporary pipeline through the sewage pipeline and are then discharged; S4: When the second flow sensor detects that the sewage flow in the temporary pipeline reaches the set value, the alarm sounds, and the operator retracts the high-pressure water gun of the dredging device into the sealed room, and then closes the second electric gate valve and the temporary sewage valve to complete the dredging; then opens the third electric gate valve and repeats the process of S1 to continue sewage discharge.

7. The method for online cleaning of tower bottom blockage according to claim 6, characterized in that: In step S2, the high-pressure water gun of the dredging device is inserted into the sewage pipeline through the connecting pipe to spray water for dredging. The specific process is as follows: S2-1: First, open the sealing water valve and continuously inject water into the sealing chamber until the sealing chamber and the slag discharge chamber are filled with water to form a liquid seal; S2-2: Then put the high-pressure water gun of the dredging device through the rotary joint and the connecting pipe in turn into the sewage pipeline to spray water for dredging.

8. The method for online cleaning of tower bottom blockage according to claim 6, characterized in that: In steps S2 and S3, during the dredging process of the high-pressure water gun of the dredging device spraying water, flushing water is introduced into the slag discharge chamber of the dredging device through the flushing port, and impurities entering the slag discharge chamber of the dredging device are flushed and discharged from the slag discharge port.

9. The method for online cleaning of tower bottom blockage according to claim 6, characterized in that: In step S4, after the dredging is completed, the connection between the sealed water outlet and the water source is disconnected, and the injection of water into the sealed chamber is stopped, so that the water in the slag discharge chamber and the sealed chamber is discharged from the sealed water outlet.

Images