Blast furnace slag hardening treatment system

Abstract

The utility model relates to a blast furnace slag hardening treatment system, which is applied to the technical field of blast furnace water granulated slag treatment and solves the problem that normal work is affected by blockage caused by hardening and slag bonding in a water pumping component in the water granulated slag treatment process. Comprising a settling pond, a filtering pond, a hot water pond, a cooling tower, a cold water pond, a water pumping pipe, a water suction pump arranged on the water pumping pipe, a water return pipe and a water return pump arranged on the water return pipe, a second control valve is arranged on the water return pipe and located between the cleaning pipe and the blast furnace punching box, and a third control valve is arranged on the water pumping pipe and located between the cleaning pipe and the hot water pump. The water slag treatment system has the effects that the water pumping pipe and the water suction pump are cleaned, so that the smoothness of the water pumping assembly is ensured, the stability of the water amount during water pumping of the water pumping assembly is ensured, and the normal work of the water slag treatment system is ensured.

Description

Technical Field

[0001] This invention relates to the field of blast furnace slag treatment technology, and in particular to a blast furnace slag caking treatment system. Background Technology

[0002] Currently used blast furnace slag flushing devices utilize a flushing box to flush blast furnace slag into a water-slag mixture. This mixture is then filtered by a water-slag treatment system to separate the water from the slag. The filtered water is then recycled back to the flushing box. (Reference) Figure 4 The existing blast furnace slag caking treatment system includes a sedimentation tank 1', a filter tank 2', a hot water tank 3', a cooling tower 4', a cold water tank 5', and a circulating water return assembly 6'. After separating water and slag through the sedimentation tank 1' and the filter tank 2', the filtered water is stored in the hot water tank 3'. Then, the water in the hot water tank 3' is pumped into the cooling tower 4' through the pump assembly 7'. Since there are also fine slag particles in the water in the hot water tank, after a long period of operation, caking occurs in the pump assembly 7'. The slag blocks the pump assembly 7', affecting the cooling effect and the system water balance. This leads to insufficient flushing water in the blast furnace flushing box, and in severe cases, slag blockage, affecting the normal operation of this water and slag treatment system or causing production accidents such as blast furnace shutdown. Utility Model Content

[0003] The purpose of this utility model is to provide a blast furnace slag caking treatment system, which solves the problem that caking and slag formation in the pump components during the water slag treatment process can easily cause blockages and affect normal operation.

[0004] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0005] This utility model provides a blast furnace slag caking treatment system, including a sedimentation tank, a filtration tank, a hot water tank, a cooling tower, a cold water tank, and a circulating water return assembly arranged sequentially along the slag treatment direction. A pump assembly is provided between the hot water tank and the cooling tower. The pump assembly includes a pump pipe and a pump mounted on the pump pipe. The circulating water return assembly is used to circulate and pump water from the cold water tank into the blast furnace stamping box. The circulating water return assembly includes a return pipe and a return pump mounted on the return pipe. The inlet of the return pipe is located inside the cold water tank. The system also includes a cleaning pipe and a first control valve mounted on the cleaning pipe. One end of the cleaning pipe is connected to the return pipe and located on the outlet side of the return pump. The other end of the cleaning pipe is connected to the pump pipe and located on the inlet side of the pump. A second control valve is provided on the return pipe and located between the cleaning pipe and the blast furnace stamping box. A third control valve is provided on the pump pipe and located between the cleaning pipe and the hot water tank.

[0006] Furthermore, it also includes a backwash assembly, which includes a first backwash water pipe and a second backwash water pipe connected to the hot water tank. Both the first backwash water pipe and the second backwash water pipe are equipped with backwash pumps. The outlet end of the first backwash water pipe is connected to the return water pipe and is located on one side of the inlet end of the return water pump. The outlet end of the second backwash water pipe is connected to the cold water tank and extends to the bottom of the cold water tank.

[0007] Furthermore, a flushing coil is provided at the bottom of the cold water tank, and the inlet of the flushing coil is connected to the outlet of the second backwash water pipe.

[0008] Furthermore, a fourth control valve is provided on the return water pipe and on one side of the return water pump inlet.

[0009] Furthermore, the filtration tank is provided with multiple partitions arranged sequentially from top to bottom along its height. The partitions divide the filtration tank into multiple chambers. Each partition is provided with a through hole connecting two adjacent chambers. The through holes are located on one side edge of the partition, and the through holes on two adjacent partitions are staggered. The outlet of the sedimentation tank is connected to the chamber at the bottom of the filtration tank, and the outlet of the chamber at the top of the filtration tank is connected to the inlet of the hot water tank.

[0010] Furthermore, compensators are installed on both the inlet and outlet sides of the return water pump, the pumping water pump, and the backwash pump.

[0011] Due to the application of the above technical solution, this utility model has the following advantages compared with the prior art:

[0012] This utility model provides a blast furnace slag caking treatment system, including a sedimentation tank, a filtration tank, a hot water tank, a cooling tower, a cold water tank, and a circulating water return assembly. A pump pipe is provided between the hot water tank and the cooling tower, and a water pump is provided on the pump pipe. The circulating water return assembly includes a return water pipe and a return water pump provided on the return water pipe, as well as a cleaning pipe and a first control valve provided on the cleaning pipe. One end of the cleaning pipe is connected to the return water pipe and is located on the outlet side of the return water pump, and the other end of the cleaning pipe is connected to the pump pipe and is located on the inlet side of the water pump. A second control valve is provided on the return water pipe and between the cleaning pipe and the blast furnace stamping box, and a third control valve is provided on the pump pipe and between the cleaning pipe and the hot water pump. By using the cleaning pipe and the first control valve installed on the cleaning pipe, when the circulating water return assembly stops pumping water into the blast furnace punching box, the second and third control valves are closed, and the first control valve on the cleaning pipe is opened. At this time, the return water pump works to pump water from the cold water pool into the pump water pipe through the cleaning pipe, thereby cleaning the pump water pipe and the water pump, ensuring the smooth flow of the pump water assembly, ensuring the stability of the water volume when the pump water assembly pumps water, and ensuring the normal operation of this slag treatment system. Attached Figure Description

[0013] The following sections will describe some specific embodiments of the present invention in a detailed manner by way of example and not limitation, with reference to the accompanying drawings. The same reference numerals in the drawings denote the same or similar parts or components. Those skilled in the art should understand that these drawings are not necessarily drawn to scale. In the drawings:

[0014] Figure 1 This is a schematic diagram of the overall process in a preferred embodiment of the present invention;

[0015] Figure 2 This is a partially enlarged view of the overall process in a preferred embodiment of this utility model;

[0016] Figure 3 This is a schematic diagram of the structure of the filter tank in a preferred embodiment of the present invention;

[0017] Figure 4 For existing water sludge treatment systems.

[0018] The reference numerals in the attached figures are explained as follows:

[0019] 1. Sedimentation tank;

[0020] 2. Filter tank; 21. Baffle plate; 22. Through hole;

[0021] 3. Hot water pool;

[0022] 4. Cooling tower;

[0023] 5. Cold water pool;

[0024] 6. Circulating water return assembly;

[0025] 7. Pump assembly; 71. Pump pipe; 72. Water pump;

[0026] 6. Circulating water return assembly; 61. Return water pipe; 62. Return water pump;

[0027] 8. Blast furnace stamping box;

[0028] 9. Backwash assembly; 91. First backwash water pipe; 92. Second backwash water pipe; 93. Backwash pump;

[0029] 10. Flushing the coils;

[0030] 12. Fourth control valve;

[0031] 13. Compensator;

[0032] 14. Cleaning pipe;

[0033] 15. First control valve;

[0034] 16. Second control valve;

[0035] 17. Third control valve. Detailed Implementation

[0036] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0037] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0038] Furthermore, the technical features involved in the different embodiments of this utility model described below can be combined with each other as long as they do not conflict with each other.

[0039] refer to Figure 1 , Figure 2 and Figure 3 The present invention provides a blast furnace slag caking treatment system, comprising a sedimentation tank 1, a filtration tank 2, a hot water tank 3, a cooling tower 4, a cold water tank 5, and a circulating water return assembly 6 arranged sequentially along the slag filtration direction. A pump assembly 7 is provided between the hot water tank 3 and the cooling tower 4. The pump assembly 7 includes a pump pipe 71 and a water pump 72 installed on the pump pipe 71. The circulating water return assembly 6 includes a return pipe 61 and a return water pump 62 installed on the return pipe 61. The inlet of the return pipe 61 is located inside the cold water tank 5. The workflow of this blast furnace slag caking treatment system is as follows: Settling tank 1 is used to store the slag discharged from the blast furnace stamping box 8 for initial settling. The settled water enters the filter tank 2 for filtration. The filtered water enters the hot water tank 3. Then, the water in the hot water tank 3 is pumped into the cooling tower 4 by the water pump 72 on the water pump pipe 71 for cooling. The cooled water is transported to the cold water tank 5 through the pipeline. Then, the water in the cold water tank 5 is pumped back into the blast furnace stamping box 8 by the return water pump 62 on the return water pipe 61 for recycling. The cold water mixes with the high-temperature slag in the blast furnace stamping box 8 to undergo water quenching. The high-temperature slag after water quenching is in the form of small particles and mixes with water, which is the water-slag mixture. Then, the water-slag mixture is discharged into the settling tank 1, and the above filtration process is repeated.

[0040] refer to Figure 1 , Figure 2 and Figure 3 The system also includes a cleaning pipe 14 and a first control valve 15 installed on the cleaning pipe 14. One end of the cleaning pipe 14 is connected to the return water pipe 61 and located on the outlet side of the return water pump 62. The other end of the cleaning pipe 14 is connected to the pump water pipe 71 and located on the inlet side of the pump water pump 72. A second control valve 16 is installed on the return water pipe 61 between the cleaning pipe 14 and the blast furnace stamping box 8. A third control valve 17 is installed on the pump water pipe 71 between the cleaning pipe 14 and the hot water tank 3. When the circulating return water assembly 6 stops pumping water into the blast furnace stamping box 8, the second control valve 16 and the third control valve 17 are closed, and the first control valve 15 on the cleaning pipe 14 is opened. At this time, the return water pump 62 works to pump water from the cold water tank 5 into the pump water pipe 71 through the cleaning pipe 14, thereby cleaning the pump water pipe 71 and the pump water pump 72, ensuring the smooth flow of the pump water assembly 7, and ensuring the normal operation of this slag treatment system.

[0041] refer to Figure 1 , Figure 2 and Figure 3 It also includes a backwash assembly 9, which includes a first backwash water pipe 91 and a second backwash water pipe 92 connected to the hot water tank 3. Both the first backwash water pipe 91 and the second backwash water pipe 92 are equipped with a backwash pump 93. The outlet end of the first backwash water pipe 91 is connected to the return water pipe 61 and is located on one side of the inlet end of the return water pump 62. The outlet end of the second backwash water pipe 92 is connected to the cold water tank 5 and extends to the bottom of the cold water tank 5. When the cold water tank 5 stores water for a long time and the circulating water return component 6 operates for an extended period, the bottom of the cold water tank 5 and the inlet of the return water pipe 61 are prone to caking, affecting the pumping speed of the return water pump 62. In this case, it is necessary to clean the cold water tank 5 and the inlet of the return water pipe 61 promptly. The backwash component 9 can then backwash the inlets of the cold water tank 5 and the return water pipe 61 in a timely manner, ensuring that the bottom of the cold water tank 5 and the inlet of the return water pipe 61 do not caking or sludge buildup. A flushing coil 10 is installed at the bottom of the cold water tank 5, and the inlet of the flushing coil 10 is connected to the outlet of the second backwash water pipe 92. The flushing coil 10 allows for better flushing and cleaning of the bottom of the cold water tank 5. A fourth control valve 12 is installed on the return water pipe 61 and located between the first backwash water pipe 91 and the return water pump 62. When backwashing is performed on the inlet of the return water pipe 61, the fourth control valve 12 is closed to prevent high-pressure backwash water from entering the return water pump 62 and causing damage to the return water pump 62.

[0042] refer to Figure 1 , Figure 2 and Figure 3The filter tank 2 has multiple baffles 21 arranged sequentially from top to bottom along its height, dividing the filter tank 2 into multiple chambers. Each baffle 21 has a through hole 22 connecting two adjacent chambers. The through holes 22 are located on one edge of the baffle 21, and the through holes 22 on adjacent baffles 21 are staggered. The outlet of the sedimentation tank 1 is connected to the bottom chamber of the filter tank 2, and the outlet of the top chamber of the filter tank 2 is connected to the inlet of the hot water tank 3. This structure of the filter tank 2 can increase the retention time of water sludge in the sedimentation tank 1 and the filter tank 2, allowing more water sludge to settle in the sedimentation tank 1 and the filter tank 2, providing sufficient time for sludge removal, and allowing more sludge to be discharged from the water sludge system.

[0043] refer to Figure 1 , Figure 2 and Figure 3 The return water pump 62, the pumping water pump 72 and the backwash pump 93 are all equipped with compensators 13 on both sides of the inlet and outlet. The compensators 13 can absorb the vibration generated by each pump during operation, thus improving the stability of the system.

[0044] In summary, by using the cleaning pipe 14 and the first control valve 15 installed on the cleaning pipe 14, when the circulating water return assembly 6 stops pumping water into the blast furnace punching box 8, the second control valve 16 and the third control valve 17 are closed, and the first control valve 15 on the cleaning pipe 14 is opened. At this time, the return water pump 62 works to pump water from the cold water pool 5 into the pump water pipe 71 through the cleaning pipe 14, thereby cleaning the pump water pipe 71 and the water pump 72, ensuring the smooth flow of the pump water assembly 7, ensuring the stability of the water volume when the pump water assembly 7 pumps water, and ensuring the normal operation of this slag treatment system.

[0045] The above embodiments are only for illustrating the technical concept and features of this utility model. Their purpose is to enable those skilled in the art to understand the content of this utility model and implement it accordingly. They should not be used to limit the protection scope of this utility model. All equivalent changes or modifications made in accordance with the spirit and essence of this utility model should be included within the protection scope of this utility model.

Claims

1. A blast furnace slag caking treatment system, comprising a sedimentation tank (1), a filter tank (2), a hot water tank (3), a cooling tower (4), a cold water tank (5), and a circulating water return assembly (6) arranged sequentially along the slag treatment direction, wherein a pump assembly (7) is provided between the hot water tank (3) and the cooling tower (4), the pump assembly (7) comprising a pump pipe (71) and a pump (72) provided on the pump pipe (71), the circulating water return assembly (6) being used to circulate and pump water from the cold water tank (5) into the blast furnace stamping box (8), the circulating water return assembly (6) comprising a return pipe (61) and a return pump (62) provided on the return pipe (61), the inlet of the return pipe (61) being located inside the cold water tank (5); characterized in that, It also includes a cleaning pipe (14) and a first control valve (15) provided on the cleaning pipe (14). One end of the cleaning pipe (14) is connected to the return water pipe (61) and is located on the side of the outlet of the return water pump (62). The other end of the cleaning pipe (14) is connected to the pump water pipe (71) and is located on the side of the inlet of the pump (72). A second control valve (16) is provided on the return water pipe (61) and between the cleaning pipe (14) and the blast furnace stamping box (8). A third control valve (17) is provided on the pump water pipe (71) and between the cleaning pipe (14) and the hot water tank (3).

2. The blast furnace slag caking treatment system according to claim 1, characterized in that, It also includes a backwash assembly (9), which includes a first backwash water pipe (91) and a second backwash water pipe (92) connected to the hot water tank (3). Both the first backwash water pipe (91) and the second backwash water pipe (92) are equipped with a backwash pump (93). The outlet end of the first backwash water pipe (91) is connected to the return water pipe (61) and is located on one side of the inlet end of the return water pump (62). The outlet end of the second backwash water pipe (92) is connected to the cold water tank (5), and the outlet end of the second backwash water pipe (92) extends to the bottom of the cold water tank (5).

3. The blast furnace slag caking treatment system according to claim 2, characterized in that, The bottom of the cold water tank (5) is provided with a flushing coil (10), and the inlet of the flushing coil (10) is connected to the outlet of the second backwash water pipe (92).

4. The blast furnace slag caking treatment system according to any one of claims 1-3, characterized in that, A fourth control valve (12) is provided on the return water pipe (61) and on one side of the inlet end of the return water pump (62).

5. The blast furnace slag caking treatment system according to claim 4, characterized in that, The filter pool (2) is provided with multiple partitions (21) arranged sequentially from top to bottom along its height. The partitions (21) divide the filter pool (2) into multiple chambers. Each partition (21) is provided with a through hole (22) connecting two adjacent chambers. The through hole (22) is located on one side edge of the partition (21). The through holes (22) on two adjacent partitions (21) are staggered. The water outlet of the sedimentation tank (1) is connected to the chamber at the bottom of the filter pool (2). The water outlet of the top chamber of the filter pool (2) is connected to the water inlet of the hot water tank (3).

6. The blast furnace slag caking treatment system according to claim 2, characterized in that, The return water pump (62), the pumping water pump (72), and the backwash pump (93) are all equipped with compensators (13) on both sides of their inlet and outlet.

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