Pulse type combined flushing device for desulfurization slurry supply system

Abstract

The invention relates to the technical field of environmental protection, and discloses a pulse type combined flushing device for a desulfurization slurry supply system, which comprises a slurry mixing tank, the discharge end of the slurry mixing tank is fixedly connected with a discharge pipe, and the discharge end of the discharge pipe is fixedly connected with a four-way joint. One connector of the four-way connector is fixedly connected with a conveying pipeline, the discharging end of the conveying pipeline is fixedly connected with a feeding pipe, one end of the conveying pipeline is provided with a high-pressure water pump, and the water outlet end of the high-pressure water pump is fixedly connected with a first water conveying pipe; one end of the first water conveying pipe is fixedly connected with one connector of the four-way connector. According to the device, through cooperation of components, a single high-pressure water pump is used for conveying water, so that a slurry supply system can be comprehensively cleaned in the modes of front-end back washing, whole-course pressurized washing and tail-end filter screen self-cleaning, human intervention is reduced, a desulfurizing agent is saved, the maintenance cost is saved, and the automation degree of the system is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of environmental protection, and particularly relates to a pulse type combined flushing device for a desulfurization slurry supply system. BACKGROUND

[0002] The wet flue gas desulfurization (WFGD) technology is the most widely used high-efficiency desulfurization process in coal-fired power plants and various industrial kilns. In the system, the supply and circulation of limestone or gypsum slurry are core links, and the stable operation of the conveying pipeline, valve, pump body and key detection instruments (such as a density meter, a pH meter and a flow meter) directly relates to the efficiency and reliability of the entire desulfurization system. The blockage of the conveying pipeline will not only increase the system resistance, cause insufficient power of the slurry supply pump and even cause damage to the equipment and measurement distortion, but also finally cause the decrease of the desulfurization efficiency, the non-planned shutdown of the system and the increase of the operation and maintenance cost.

[0003] At present, the conventional solution to the blockage problem is to use continuous low-pressure flushing or regular simple high-pressure flushing. However, the continuous flushing will dilute the slurry, affect the reaction process and produce a large amount of waste water. The simple regular high-pressure flushing has the defects of single impact force, incomplete cleaning, large water consumption and the like, and has limited cleaning effect on the internal pipe diameter which has been hardened. SUMMARY

[0004] The present application solves the technical problem that the cleaning effect of the low-pressure flushing or simple high-pressure flushing is limited in the prior art. Therefore, the present application provides a pulse type combined flushing device for a desulfurization slurry supply system.

[0005] In order to achieve the above object, the technical scheme adopted by the present application is as follows: A pulse type combined flushing device for a desulfurization slurry supply system, comprising a slurry mixing tank, a discharge pipe fixedly connected to a discharge end of the slurry mixing tank, a four-way joint fixedly connected to a discharge end of the discharge pipe, a conveying pipeline fixedly connected to one interface of the four-way joint, a feeding pipe fixedly connected to a discharge end of the conveying pipeline, a high-pressure water pump arranged at one end of the conveying pipeline, a first water delivery pipe fixedly connected to a water outlet end of the high-pressure water pump, one end of the first water delivery pipe fixedly connected to one interface of the four-way joint, a second water delivery pipe fixedly connected to one interface of the four-way joint, one end of the second water delivery pipe fixedly connected to one side of the feeding pipe and penetrating into an inner cavity, a plurality of water storage tanks arranged between the second water delivery pipe and the conveying pipeline, a drain cylinder arranged in the inner cavity of the water storage tank, the lower end of the drain cylinder fixedly sleeved at the bottom of the water storage tank and penetrating to the outside, a spray head fixedly connected to the lower end of the drain cylinder and in communication with the conveying pipeline, a plurality of drain ports arranged on the outer wall of the drain cylinder and flush with the top of the water storage tank, a blocking piece movably sleeved in the inner cavity of the drain cylinder and blocking the drain ports, a connecting rod fixedly connected to the top surface of the blocking piece, the upper end of the connecting rod movably sleeved at the top of the drain cylinder and penetrating to the outside, a trigger assembly connected to the upper end of the connecting rod, a third water delivery pipe fixedly connected to the side wall of the water storage tank and fixedly connected to the second water delivery pipe through a joint.

[0006] Preferably, the trigger assembly comprises a connecting piece, a floating plate arranged at the top of the connecting piece, a plurality of springs fixedly connected to the bottom surface of the floating plate, the lower ends of the springs fixedly connected to the top surface of the connecting piece, a magnet fixedly connected to the upper end surface of the outer wall of the drain cylinder, an iron piece fixedly connected to the bottom surface of the connecting piece, and the iron piece magnetically attracted to the top surface of the magnet.

[0007] Preferably, a plurality of guide sliding grooves are arranged on the side surface of the inner wall of the water storage tank and close to the top, a plurality of guide sliding blocks are fixedly connected to the side wall of the floating plate, and one side of the guide sliding blocks is slidingly connected in the adjacent guide sliding grooves.

[0008] Preferably, a first filter screen is fixedly connected to the bottom of the inner cavity of the slurry mixing tank, a first blowdown pipe is fixedly connected to the bottom of the side wall of the slurry mixing tank, a second filter screen is fixedly connected to the inner wall of the feeding pipe, a second blowdown pipe is fixedly connected to the bottom of the feeding pipe and close to one side of the conveying pipeline, and the first blowdown pipe and the second blowdown pipe are both provided with a first stop valve.

[0009] Preferably, one end of the feeding pipe is fixedly connected to a feeding pipe, and the discharge pipe, the conveying pipeline, the first water delivery pipe, the second water delivery pipe and the feeding pipe are all provided with a second stop valve.

[0010] Preferably, the lower end of the drain cylinder is provided with a one-way valve for preventing liquid from flowing back to the water storage tank.

[0011] The pulse type combined flushing device for the desulfurization slurry supply system according to claim 1, wherein a plurality of through holes are formed in the block, and the material of the block is the same as that of the floating plate.

[0012] The technical effects and advantages of the present application are as follows: In the present application, the single high-pressure water pump delivers water through the cooperation between components, so that the device has the modes of front-end backwashing, full-process pressurized flushing and end filter screen self-cleaning to comprehensively clean the slurry supply system, reduces human intervention, saves desulfurizer, saves maintenance cost and improves the degree of system automation.

[0013] In the present application, the block is periodically moved up and down through the trigger assembly, so that high-pressure water is periodically sprayed into the delivery pipeline to form a water hammer effect to break hard scale and impact the hard scale attached to the inner wall of the delivery pipeline, thereby avoiding the hard scale from being attached thickly to cause the delivery pipeline to be blocked and affect the delivery efficiency of the slurry. BRIEF DESCRIPTION OF DRAWINGS

[0014] The disclosure of the present application will be described with reference to the accompanying drawings. It should be understood that the drawings are only for illustrative purposes, and are not intended to limit the scope of protection of the present application. In the drawings, the same reference numerals are used to refer to the same components: Figure 1 It is a schematic view of the overall structure of the present application; Figure 2 It is a structural cross-sectional view of the slurry mixing tank in the present application; Figure 3 It is a structural cross-sectional view of the water storage tank in the present application; Figure 4 It is a structural cross-sectional view of the drain cylinder in the present application; Figure 5 It is a structural cross-sectional view of the feeding pipe in the present application.

[0015] Legend: 1, slurry mixing tank; 2, discharge pipe; 3, four-way joint; 4, conveying pipeline; 5, feeding pipe; 6, high-pressure water pump; 7, first water pipe; 8, second water pipe; 9, water storage tank; 10, drain cylinder; 11, spray head; 12, drain port; 13, block; 14, connecting rod; 15, third water pipe; 16, connecting piece; 17, floating plate; 18, spring; 19, magnet; 20, iron sheet; 21, guide chute; 22, guide block; 23, first filter screen; 24, first drain pipe; 25, second filter screen; 26, second drain pipe; 27, first stop valve; 28, feeding pipe; 29, second stop valve; 30, check valve; 31, first drain pipe; 32, second drain pipe. DETAILED DESCRIPTION

[0016] It is easy to understand that, according to the technical solution of the present application, those skilled in the art can propose various structures and implementation modes that can be replaced with each other without changing the essential spirit of the present application. Therefore, the following detailed description and the accompanying drawings are only exemplary descriptions of the technical solution of the present application, and should not be regarded as the whole or as a limitation or restriction on the technical solution of the present application.

[0017] REFERENCE Figure 1-5 As shown in the drawings, the present application provides a technical solution: a pulse type combined flushing device for a desulfurization slurry supply system, comprising a slurry mixing tank 1, a discharge end of the slurry mixing tank 1 is fixedly connected with a discharge pipe 2, a discharge end of the discharge pipe 2 is fixedly connected with a four-way joint 3, one of the interfaces of the four-way joint 3 is fixedly connected with a conveying pipeline 4, a discharge end of the conveying pipeline 4 is fixedly connected with a feeding pipe 5, one end of the conveying pipeline 4 is provided with a high-pressure water pump 6, a water outlet end of the high-pressure water pump 6 is fixedly connected with a first water pipe 7, one end of the first water pipe 7 is fixedly connected with one of the interfaces of the four-way joint 3, one of the interfaces of the four-way joint 3 is fixedly connected with a second water pipe 8, one end of the second water pipe 8 is fixedly connected with one side of the feeding pipe 5 and penetrates into the inner cavity, a plurality of water storage tanks 9 are arranged between the second water pipe 8 and the conveying pipeline 4, the inner cavity of the water storage tank 9 is provided with a drain cylinder 10, the lower end of the drain cylinder 10 is fixedly sleeved on the bottom of the water storage tank 9 and penetrates to the outside, the lower end of the drain cylinder 10 is fixedly connected with a spray head 11, the water outlet end of the spray head 11 is fixedly connected with the side wall of the conveying pipeline 4 and is in communication, a plurality of drain ports 12 are formed in the outer wall of the drain cylinder 10, the bottoms of the drain ports 12 are flush with the top of the water storage tank 9, a block 13 that blocks the drain ports 12 is movably sleeved in the inner cavity of the drain cylinder 10, the top surface of the block 13 is fixedly connected with a connecting rod 14, the upper end of the connecting rod 14 is movably sleeved in the top of the drain cylinder 10 and penetrates to the outside, the upper end of the connecting rod 14 is connected with a trigger assembly, a third water pipe 15 is fixedly connected with the side wall of the water storage tank 9, one end of the third water pipe 15 is fixedly connected with the second water pipe 8 through a joint.

[0018] The trigger assembly comprises a connecting piece 16, the top of the connecting piece 16 is provided with a floating plate 17, the bottom surface of the floating plate 17 is fixedly connected with a plurality of springs 18, the lower end of the spring 18 is fixedly connected with the top surface of the connecting piece 16, the upper end surface of the outer wall of the water storage tank 9 is fixedly connected with a magnet 19, the bottom surface of the connecting piece 16 is fixedly connected with an iron sheet 20, the iron sheet 20 is magnetically attracted to the top surface of the magnet 19, after the floating plate 17 rises to the highest position, the pulling force of the spring 18 is greater than the magnetic attraction force between the iron sheet 20 and the magnet 19, so that when the iron sheet 20 and the magnet 19 are no longer attracted, the elastic force of the spring 18 pulls the connecting piece 16 to quickly rise, so that the blocking piece 13 quickly rises and no longer blocks the drain hole 12.

[0019] A plurality of guide sliding grooves 21 are formed in the side surface of the inner wall of the water storage tank 9 and close to the top, a plurality of guide sliding blocks 22 are fixedly connected to the side wall of the floating plate 17, one side of the guide sliding block 22 is slidingly connected in the adjacent guide sliding groove 21, the guide sliding block 22 vertically moves up and down on the guide sliding groove 21, so that the floating plate 17 vertically moves up and down.

[0020] A first filter screen 23 is fixedly connected to the bottom of the inner cavity of the slurry mixing tank 1, a first blowdown pipe 24 is fixedly connected to the bottom of the side wall of the slurry mixing tank 1, a second filter screen 25 is fixedly connected to the inner wall of the feeding pipe 5, a second blowdown pipe 26 is fixedly connected to the bottom of the feeding pipe 5 and close to one side of the conveying pipeline 4, a first stop valve 27 is installed on the first blowdown pipe 24 and the second blowdown pipe 26, the slurry discharged through the slurry mixing tank 1 is filtered through the first filter screen 23, when the first filter screen 23 is back-flushed, water and impurities are discharged through the first blowdown pipe 24, the liquid discharged into the feeding pipe 5 is filtered through the second filter screen 25, when the second filter screen 25 is back-flushed, water and impurities are discharged through the second blowdown pipe 26.

[0021] One end of the feeding pipe 5 is fixedly connected with a feeding pipe 28, a second stop valve 29 is installed on the discharge pipe 2, the conveying pipeline 4, the first water conveying pipe 7, the second water conveying pipe 8 and the feeding pipe 28, when the slurry is conveyed, the second stop valves 29 on the discharge pipe 2, the conveying pipeline 4 and the feeding pipe 28 are opened, and the other second stop valves 29 are closed, so that the slurry can be discharged into the desulfurization tower through the feeding pipe 28, when the inside of the device is flushed, the second stop valves 29 on the conveying pipeline 4 and the feeding pipe 28 are closed, and the second stop valves 29 on the first water conveying pipe 7 and the second water conveying pipe 8 are opened, so that water can enter the water storage tank 9, the second stop valves 29 on the second water conveying pipe 8 are located at two positions, and are installed on the connecting end of the four-way joint 3 and the feeding pipe 5.

[0022] The lower end of the drain cylinder 10 is provided with a one-way valve 30, which prevents liquid from flowing back to the water storage tank 9 from the conveying pipeline 4 in one direction, and intercepts the slurry in the conveying pipeline 4 from entering the water storage tank 9 through the drain cylinder 10 in one direction.

[0023] A plurality of through holes 31 are formed in the block 13, and the material of the block 13 is the same as that of the floating plate 17, so that water can pass through the through holes 31, thereby avoiding a large resistance in the drain cylinder 10 when the block 13 rises.

[0024] Working principle: when the device needs to be flushed, the second stop valve 29 on the conveying pipeline 4 is closed, while the second stop valve 29 on the discharge pipe 2, the first water conveying pipe 7 and the second water conveying pipe 8 is opened, the first stop valve 27 on the feeding pipe 28 is closed, while the first stop valve 27 on the first blowdown pipe 24 and the second blowdown pipe 26 is opened, at this time, the high-pressure water pump 6 extracts the desulfurizing agent, which is discharged into the four-way joint 3 through the first water conveying pipe 7, the four-way joint 3 discharges the water into the discharge pipe 2 and the second water conveying pipe 8, respectively, the desulfurizing agent in the discharge pipe 2 flows upward into the slurry mixing tank 1, and the first filter screen 23 is back-flushed to wash away the impurities on the first filter screen 23, a part of the desulfurizing agent in the second water conveying pipe 8 is discharged into the conveying pipeline 4 through the drain cylinder 10 to flush the inside of the conveying pipeline 4, and the other part of the desulfurizing agent enters the feeding pipe 5 to back-flush the second filter screen 25, the impurities back-flushed from the first filter screen 23 are discharged through the first blowdown pipe 24, and the impurities in the conveying pipeline 4 enter the feeding pipe 5 and are discharged through the second blowdown pipe 26 together with the impurities back-flushed from the second filter screen 25, in this way, different positions of the slurry supply system can be flushed in different ways, and through the cooperation between the components, the single high-pressure water pump 6 can deliver the desulfurizing agent to the device, which can realize the front-end back-flushing, full-process pressurized flushing and end filter screen self-cleaning of the slurry supply system, reduces human intervention, saves desulfurizing agent and maintenance cost, improves the degree of automation of the system, the desulfurizing agent in the second water conveying pipe 8 enters the water storage tank 9 through the third water conveying pipe 15, when the water level in the water storage tank 9 is higher than the bottom surface of the floating plate 17, the floating plate 17 is pushed upward by the liquid, the upward movement of the floating plate 17 pulls the spring 18, when the pulling force of the spring 18 exceeds the adsorption force of the magnet 19 and the iron sheet 20, the connecting piece 16 is pulled upward by the spring 18 and moves upward quickly, the connecting piece 16 drives the connecting rod 14 to move upward, the connecting rod 14 drives the block 13 to move upward, so that the desulfurizing agent can enter the drain cylinder 10 through the drain port 12, the high-pressure water pump 6 applies a heavy pressure to the desulfurizing agent during delivery, and the desulfurizing agent stored in the water storage tank 9 also generates pressure, under the double pressure, the desulfurizing agent is sprayed out of the nozzle 11 in a high-pressure manner to flush the inside of the conveying pipeline 4, the flow rate and flow velocity of the desulfurizing agent sprayed out of the nozzle 11 exceed the flow rate and flow velocity of the desulfurizing agent discharged into the drain cylinder 10, therefore, the water loss rate in the drain cylinder 10 exceeds the discharge rate, as the water becomes less and less, when the water level is lower than the top of the drain port 12, the block 13 starts to move downward until the drain port 12 is blocked, so that the water cannot be discharged through the drain port 12, at this time, the connecting piece 16 also descends to the iron sheet 20 and the magnet 19 to be re-adsorbed, then the water added to the water storage tank 9 continues to increase, and the high-pressure water is periodically sprayed into the conveying pipeline 4 in this way, forming a "water hammer effect" to break down the hard scale and flush it down from the inner wall of the conveying pipeline 4,Avoiding the scale from adhering thickly to cause the conveying pipeline 4 to be blocked, affecting the conveying efficiency of the slurry.

[0025] The technical scope of the present application is not limited to the above description, and those skilled in the art can make various modifications and changes to the above embodiments without departing from the technical idea of the present application, and these modifications and changes should all belong to the protection scope of the present application.

Claims

1. A pulse type combined flusher for a desulfurization slurry supply system, characterized by, The utility model provides a kind of slurry mixing tank, which comprises a slurry mixing tank, a discharge pipe is fixedly connected to the discharge end of the slurry mixing tank, a four-way joint is fixedly connected to the discharge end of the discharge pipe, a conveying pipeline is fixedly connected to one interface of the four-way joint, a feeding pipe is fixedly connected to the discharge end of the conveying pipeline, a high-pressure water pump is arranged at one end of the conveying pipeline, a first water supply pipe is fixedly connected to the water outlet end of the high-pressure water pump, one end of the first water supply pipe is fixedly connected to one interface of the four-way joint, a second water supply pipe is fixedly connected to one interface of the four-way joint, one end of the second water supply pipe is fixedly connected to one side of the feeding pipe and penetrates into the inner cavity, a plurality of water storage tanks are arranged between the second water supply pipe and the conveying pipeline, a drain cylinder is arranged in the inner cavity of the water storage tank, the lower end of the drain cylinder is fixedly sleeved at the bottom of the water storage tank and penetrates to the outside, a spray head is fixedly connected to the lower end of the drain cylinder, the water outlet end of the spray head is fixedly connected to the side wall of the conveying pipeline and is in communication, a plurality of drain holes are formed in the outer wall of the drain cylinder, the bottom of the drain hole is flush with the top of the water storage tank, a blocking piece is movably sleeved in the inner cavity of the drain cylinder, the side wall of the blocking piece blocks the drain hole, a connecting rod is fixedly connected to the top surface of the blocking piece, the upper end of the connecting rod is movably sleeved in the top of the drain cylinder and penetrates to the outside, a trigger assembly is connected to the upper end of the connecting rod, a third water supply pipe is fixedly connected to the side wall of the water storage tank, and one end of the third water supply pipe is fixedly connected to the second water supply pipe through a joint.

2. The pulse type combined flushing device for desulfurization slurry supply system according to claim 1, characterized in that: The trigger assembly comprises a connecting piece, a floating plate is arranged on the top of the connecting piece, a plurality of springs are fixedly connected to the bottom surface of the floating plate, the lower end of the spring is fixedly connected to the top surface of the connecting piece, a magnet is fixedly connected to the upper end surface of the outer wall of the drain cylinder, an iron sheet is fixedly connected to the bottom surface of the connecting piece, and the iron sheet is magnetically attracted to the top surface of the magnet.

3. The pulse type combined flusher for desulfurization slurry supply system according to claim 2, characterized in that: A plurality of guide sliding grooves are formed in the side surface of the inner wall of the water storage tank and close to the top, a plurality of guide sliding blocks are fixedly connected to the side wall of the floating plate, and one side of the guide sliding block is slidingly connected in the adjacent guide sliding groove.

4. The pulse type combined flusher for desulfurization slurry supply system according to claim 1, characterized in that: A first filter screen is fixedly connected to the bottom of the inner cavity of the slurry mixing tank, a first blowdown pipe is fixedly connected to the bottom of the side wall of the slurry mixing tank, a second filter screen is fixedly connected to the inner wall of the feeding pipe, a second blowdown pipe is fixedly connected to the bottom of the feeding pipe and close to one side of the conveying pipeline, and a first stop valve is installed on the first blowdown pipe and the second blowdown pipe.

5. The pulse type combined flusher for desulfurization slurry supply system according to claim 1, characterized in that: A feeding pipe is fixedly connected to one end of the feeding pipe, and a second stop valve is installed on the discharge pipe, the conveying pipeline, the first water supply pipe, the second water supply pipe, and the feeding pipe.

6. The pulse type combined flusher for desulfurization slurry supply system according to claim 1, characterized in that: A one-way valve is installed at the lower end of the drain cylinder, and the one-way valve prevents liquid from flowing from the conveying pipeline to the water storage tank in reverse.

7. The pulse type combined flusher for desulfurization slurry supply system according to claim 1, characterized by: A plurality of through holes are formed in the blocking piece, and the material of the blocking piece is the same as that of the floating plate.

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