Quenching tower for purifying flue gas of rotary kiln

Abstract

The quench tower comprises a bottom block, the front side of the top of the bottom block is fixedly connected with a quench tower body, the bottom of the left side of the quench tower body is communicated with a gas inlet pipe, and heat absorption pipes are arranged on the two sides in the gas inlet pipe. The input end and the output end of the heat absorption pipe penetrate to the outer side of the air inlet pipe. A water source in the water tank is conveyed into the flow dividing pipe and the heat absorbing pipe through the water pump, when flue gas enters the quench tower through the gas inlet pipe, waste heat in the flue gas heats the heat absorbing pipe and the water source in the heat absorbing pipe, and the heated water source is conveyed back into the water tank through the heat preservation pipe. The quench tower for purifying the flue gas of the rotary kiln has the advantage of waste heat recovery, the stability of the quench tower is improved, meanwhile, heat loss is avoided, and energy waste is prevented.

Description

Technical Field

[0001] The utility model relates to the technical field of rotary kiln flue gas purification, in particular to a quench tower for rotary kiln flue gas purification. Background Technique

[0002] A rotary kiln refers to a rotary calcining kiln, commonly known as a rotary kiln. The rotary kiln is mainly used as a device for magnetizing roasting of lean iron ore in iron and steel plants in the metallurgical industry. A quench tower is a device for quickly cooling high-temperature flue gas. Its main function is to control the temperature in the flue gas by rapid cooling to avoid the resynthesis of harmful substances. The working principle of the quench tower is mainly to set cooling water spray guns at the upper part of the tower, so that the high-temperature flue gas entering the tower directly contacts the atomized spray water mist. The flue gas contacts and evaporates with the water mist within 1 second, achieving rapid cooling. The application of the quench tower is not limited to waste treatment, but also plays an important role in other fields such as industrial waste gas treatment.

[0003] When the rotary kiln is in use, a large amount of flue gas will be generated. In order to purify the generated flue gas for convenient discharge, a quench tower is needed. The patent document with the publication number CN219571979U discloses a quench tower for rapidly cooling high-temperature flue gas, including a cooling component. The cooling component includes a water tank, a through hole, a main water pipe, a water pump, a first branch pipe, a spiral pipe, and an inner shell. A through hole is opened at the center of the upper surface of the water tank. In the utility model, the water in the water tank is cooled by a condenser. The cold water is pumped into the first branch pipe and the second branch pipe by the water pump. The cold water in the first branch pipe enters the spiral pipe to cool the inner shell. By reducing the temperature of the inner shell, the internal flue gas is cooled, thereby preventing the temperature of the barrel wall from being too high and resulting in poor cooling effect of the quench tower. The cold water in the second branch pipe passes through the spray water pipe and is sprayed out through the atomizing nozzles on the multiple spray pipes at the upper and lower parts of the spray water pipe, thereby cooling the internal flue gas from bottom to top. By cooling the barrel wall of the quench tower and spraying with the atomizing nozzles simultaneously to cool the internal flue gas, the internal gas of the quench tower can be quickly cooled well.

[0004] The above-mentioned existing technical solutions have the following defects: During the use of this quench tower, the waste heat in the flue gas cannot be recovered and utilized, which easily causes a large amount of heat loss and results in waste of energy. Content of the Utility Model

[0005] To solve the problems raised in the above background technique, the purpose of the present utility model is to provide a quench tower for rotary kiln flue gas purification, which has the advantage of waste heat recovery, and solves the problem that the waste heat in the flue gas cannot be recovered and utilized during the use of the quench tower.

[0006] To achieve the above object, the present utility model provides the following technical solution: A quenching tower for purifying the flue gas of a rotary kiln, including a bottom block, the front side of the top of the bottom block is fixedly connected with a quenching tower, the bottom of the left side of the quenching tower is communicated with an intake pipe, both sides inside the intake pipe are provided with heat absorption pipes, the input end and the output end of the heat absorption pipe both penetrate to the outside of the intake pipe, the left side of the top of the bottom block is fixedly connected with a water pump, the input end of the water pump is communicated with a connecting pipe, the input end of the connecting pipe is communicated with a water tank, the bottom of the water tank is fixedly connected with the top of the bottom block, the output end of the water pump is communicated with a shunt pipe, the front of the shunt pipe is communicated with the input end of the heat absorption pipe, a hollow pipe is arranged inside the heat absorption pipe, the surface of the hollow pipe is communicated with a first horizontal pipe, and both sides of the surface of the hollow pipe are communicated with second horizontal pipes.

[0007] Preferably, a U-shaped pipe is fixedly connected to the top of the intake pipe, the bottom of the U-shaped pipe penetrates to the inside of the intake pipe, rings are sleeved on both sides of the surface of the hollow pipe, and the top of the ring is communicated with the bottom of the U-shaped pipe.

[0008] Preferably, the input end of the U-shaped pipe is communicated with a first control valve, the input end of the first control valve is communicated with the output end of the shunt pipe, and a drainage groove is opened at the bottom of the inner wall of the intake pipe.

[0009] Preferably, water inlet holes are opened on both sides of the surface of the hollow pipe, limiting rings are slidably connected to both sides of the ring, and the inner wall of the limiting ring is fixedly connected to the surface of the hollow pipe.

[0010] Preferably, a thermometer is installed on the right side of the top of the water tank, the temperature measuring end of the thermometer extends into the inside of the water tank, and an exhaust valve is communicated with the top of the water tank.

[0011] Preferably, spray heads are communicated with both sides of the first horizontal pipe and the inside of the second horizontal pipe, and a fan blade is fixedly connected to the left side of the surface of the hollow pipe.

[0012] Preferably, a second control valve is communicated with the bottom of the left side of the water tank, an activated carbon filter plate is longitudinally fixedly connected to the left side inside the water tank, the output end of the heat absorption pipe is communicated with a heat preservation pipe, and the output end of the heat preservation pipe is communicated with the top of the water tank.

[0013] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0014] 1. The utility model conveys the water source inside the water tank to the inside of the shunt pipe and the heat absorption pipe through a water pump. When the flue gas enters the inside of the quench tower through the intake pipe, the waste heat in the flue gas heats the heat absorption pipe and the water source inside. The heated water source is conveyed back to the inside of the water tank through the heat preservation pipe to circularly heat the water source inside the water tank. At this time, the waste heat in the flue gas can be utilized. The quench tower for rotary kiln flue gas purification has the advantage of waste heat recovery, improves the stability of the quench tower, and at the same time avoids heat loss and prevents energy waste.

[0015] 2. Through the combined use of the U-shaped pipe and the ring, the utility model can facilitate the water pump to convey the water source to the inside of the hollow pipe, the first horizontal pipe and the second horizontal pipe, and facilitate the nozzle to clean the surface of the heat absorption pipe; through the setting of the first control valve, the water source entering the inside of the U-shaped pipe, the hollow pipe, the first horizontal pipe and the second horizontal pipe can be controlled. Through the setting of the drainage groove, the drainage of waste water can be facilitated to prevent the waste water from accumulating inside the intake pipe. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a schematic structural diagram of the utility model;

[0017] Figure 2 is the utility model Figure 1 exploded view of the structure of the intake pipe in;

[0018] Figure 3 is the utility model Figure 1 exploded view of the structure of the water tank in;

[0019] Figure 4 is the utility model Figure 2 enlarged view of the structure at A in.

[0020] In the figure: 1, bottom block; 2, quench tower; 3, intake pipe; 4, heat absorption pipe; 5, water pump; 6, connecting pipe; 7, water tank; 8, shunt pipe; 9, hollow pipe; 10, first horizontal pipe; 11, second horizontal pipe; 12, U-shaped pipe; 13, ring; 14, first control valve; 15, drainage groove; 16, water inlet hole; 17, limiting ring; 18, thermometer; 19, exhaust valve; 20, nozzle; 21, fan blade; 22, second control valve; 23, activated carbon filter plate; 24, heat preservation pipe. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0021] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments in the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0022] As shown Figures 1 to 4 in the figure, a quenching tower for rotary kiln flue gas purification provided by the utility model includes a bottom block 1. The quenching tower 2 is a common water spray quenching tower on the market. The front side of the top of the bottom block 1 is fixedly connected with the quenching tower 2. The bottom of the left side of the quenching tower 2 is communicated with an air inlet pipe 3. Both sides inside the air inlet pipe 3 are provided with heat absorption pipes 4. The input end and the output end of the heat absorption pipe 4 penetrate to the outside of the air inlet pipe 3. The left side of the top of the bottom block 1 is fixedly connected with a water pump 5. The input end of the water pump 5 is communicated with a connecting pipe 6. The input end of the connecting pipe 6 is communicated with a water tank 7. The bottom of the water tank 7 is fixedly connected with the top of the bottom block 1. The output end of the water pump 5 is communicated with a shunt pipe 8. The front of the shunt pipe 8 is communicated with the input end of the heat absorption pipe 4. The inside of the heat absorption pipe 4 is provided with a hollow pipe 9. The surface of the hollow pipe 9 is communicated with a first horizontal pipe 10. Both sides of the surface of the hollow pipe 9 are communicated with a second horizontal pipe 11.

[0023] Referring Figure 2 to the figure, a U-shaped pipe 12 is fixedly connected to the top of the air inlet pipe 3. The bottom of the U-shaped pipe 12 penetrates to the inside of the air inlet pipe 3. Both sides of the surface of the hollow pipe 9 are sleeved with a ring 13. The top of the ring 13 is communicated with the bottom of the U-shaped pipe 12.

[0024] As a technical optimization scheme of the utility model, through the cooperation of the U-shaped pipe 12 and the ring 13, the water pump 5 can conveniently deliver water to the inside of the hollow pipe 9, the first horizontal pipe 10 and the second horizontal pipe 11, and the nozzle 20 can conveniently clean the surface of the heat absorption pipe 4.

[0025] Referring Figure 2 to the figure, the input end of the U-shaped pipe 12 is communicated with a first control valve 14. The input end of the first control valve 14 is communicated with the output end of the shunt pipe 8. A drainage groove 15 is opened at the bottom of the inner wall of the air inlet pipe 3.

[0026] As a technical optimization scheme of the utility model, through the setting of the first control valve 14, the water entering the inside of the U-shaped pipe 12, the hollow pipe 9, the first horizontal pipe 10 and the second horizontal pipe 11 can be controlled. Through the setting of the drainage groove 15, the waste water can be conveniently drained, preventing the waste water from accumulating inside the air inlet pipe 3.

[0027] Referring Figure 4 to the figure, water inlet holes 16 are opened on both sides of the surface of the hollow pipe 9. Both sides of the ring 13 are slidably connected with a limit ring 17. The inner wall of the limit ring 17 is fixedly connected with the surface of the hollow pipe 9.

[0028] As a technical optimization scheme of the utility model, through the setting of the water inlet holes 16, the water can conveniently enter the inside of the hollow pipe 9. Through the setting of the limit ring 17, the position of the ring 13 can be limited, preventing the ring 13 from detaching from the hollow pipe 9.

[0029] Reference Figure 3 , a thermometer 18 is installed on the right side of the top of the water tank 7, the temperature measuring end of the thermometer 18 extends into the interior of the water tank 7, and an exhaust valve 19 is connected to the top of the water tank 7.

[0030] As a technical optimization scheme of the present utility model, through the setting of the thermometer 18, it is convenient for users to observe the temperature inside the water tank 7. Through the setting of the exhaust valve 19, the excess gas inside the water tank 7 can be discharged.

[0031] Reference Figure 2 , spray heads 20 are connected to both sides of the first horizontal pipe 10 and the inner side of the second horizontal pipe 11, and a fan blade 21 is fixedly connected to the left side of the surface of the hollow pipe 9.

[0032] As a technical optimization scheme of the present utility model, through the setting of the spray heads 20, the sundries on the surface of the heat absorption pipe 4 can be sprayed and cleaned. Through the setting of the fan blade 21, it is convenient for the hollow pipe 9, the first horizontal pipe 10, the second horizontal pipe 11 and the spray heads 20 to rotate.

[0033] Reference Figure 3 , a second control valve 22 is connected to the bottom on the left side of the water tank 7, an activated carbon filter plate 23 is longitudinally fixedly connected to the left side inside the water tank 7, the output end of the heat absorption pipe 4 is connected to a heat preservation pipe 24, and the output end of the heat preservation pipe 24 is connected to the top of the water tank 7.

[0034] As a technical optimization scheme of the present utility model, through the setting of the second control valve 22, the water source discharged from the water tank 7 can be controlled. Through the setting of the activated carbon filter plate 23, the water source inside the water tank 7 can be filtered to prevent impurities in the water source from blocking the heat absorption pipe 4.

[0035] Working principle and usage process of the present utility model: During use, the user transports the water source to the inside of the water tank 7 through the water inlet end for water source storage. Then, the water pump 5 is started. The input end of the water pump 5 transports the water source inside the water tank 7 to the inside of the shunt pipe 8 and the heat absorption pipe 4 through the connecting pipe 6. Then, the user starts the quench tower 2. When the flue gas enters the inside of the quench tower 2 through the inlet pipe 3, the heat in the flue gas is used to heat the heat absorption pipe 4 and the water source inside. The heated water source is transported back to the inside of the water tank 7 through the heat preservation pipe 24 for circulating heating of the water source inside the water tank 7. At this time, the waste heat in the flue gas can be utilized. At this time, the user opens the first control valve 14. The water source inside the shunt pipe 8 enters the inside of the U-shaped pipe 12 and the circular ring 13 through the first control valve 14. Then, the water source inside the circular ring 13 enters the inside of the hollow pipe 9, the first horizontal pipe 10, and the second horizontal pipe 11 through the water inlet holes 16. Then, the sundries on the surface of the heat absorption pipe 4 are sprayed and cleaned through the spray head 20. At the same time, when the flue gas drives the hollow pipe 9, the first horizontal pipe 10, the second horizontal pipe 11, and the spray head 20 to rotate clockwise through the fan blade 21, the rotating spray head 20 evenly cleans the surface of the heat absorption pipe 4.

[0036] In summary: The quench tower for rotary kiln flue gas purification, through the combined use of the bottom block 1, the quench tower 2, the inlet pipe 3, the heat absorption pipe 4, the water pump 5, the connecting pipe 6, the water tank 7, the shunt pipe 8, the hollow pipe 9, the first horizontal pipe 10, and the second horizontal pipe 11, solves the problem that during the use of the quench tower, the waste heat in the flue gas cannot be recovered and utilized, easily causing a large amount of heat loss and resulting in energy waste.

[0037] It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or elements inherent to such process, method, article or device.

[0038] Although the embodiments of the present utility model have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principle and spirit of the present utility model. The scope of the present utility model is defined by the appended claims and their equivalents.

Claims

1. A quenching tower for purifying the flue gas of a rotary kiln, comprising a bottom block (1), characterized in that: A quench tower (2) is fixedly connected to the front side of the top of the bottom block (1). An intake pipe (3) is connected to the bottom of the left side of the quench tower (2). Heat absorption pipes (4) are arranged on both sides inside the intake pipe (3). The input end and the output end of the heat absorption pipe (4) penetrate to the outside of the intake pipe (3). A water pump (5) is fixedly connected to the left side of the top of the bottom block (1). The input end of the water pump (5) is connected to a connecting pipe (6). The input end of the connecting pipe (6) is connected to a water tank (7). The bottom of the water tank (7) is fixedly connected to the top of the bottom block (1). The output end of the water pump (5) is connected to a shunt pipe (8). The front of the shunt pipe (8) is connected to the input end of the heat absorption pipe (4). A hollow pipe (9) is arranged inside the heat absorption pipe (4). A first horizontal pipe (10) is connected to the surface of the hollow pipe (9). Second horizontal pipes (11) are connected to both sides of the surface of the hollow pipe (9).

2. The quenching tower for rotary kiln flue gas purification according to claim 1, characterized in that: A U-shaped pipe (12) is fixedly connected to the top of the intake pipe (3). The bottom of the U-shaped pipe (12) penetrates into the intake pipe (3). Rings (13) are sleeved on both sides of the surface of the hollow pipe (9). The top of the ring (13) is connected to the bottom of the U-shaped pipe (12).

3. The quenching tower for rotary kiln flue gas purification according to claim 2, characterized in that: A first control valve (14) is connected to the input end of the U-shaped pipe (12). The input end of the first control valve (14) is connected to the output end of the shunt pipe (8). A drainage groove (15) is formed at the bottom of the inner wall of the intake pipe (3).

4. The quenching tower for rotary kiln flue gas purification according to claim 2, characterized in that: Water inlet holes (16) are formed on both sides of the surface of the hollow pipe (9). Limit rings (17) are slidably connected to both sides of the ring (13). The inner wall of the limit ring (17) is fixedly connected to the surface of the hollow pipe (9).

5. The quenching tower for rotary kiln flue gas purification according to claim 1, characterized in that: A thermometer (18) is installed on the right side of the top of the water tank (7). The temperature measuring end of the thermometer (18) extends into the water tank (7). An exhaust valve (19) is connected to the top of the water tank (7).

6. The quenching tower for rotary kiln flue gas purification according to claim 1, characterized in that: Sprayers (20) are connected to both sides of the first horizontal pipe (10) and the inside of the second horizontal pipe (11). A fan blade (21) is fixedly connected to the left side of the surface of the hollow pipe (9).

7. The quenching tower for rotary kiln flue gas purification according to claim 1, characterized in that: A second control valve (22) is connected to the bottom of the left side of the water tank (7). An activated carbon filter plate (23) is longitudinally fixedly connected to the left side inside the water tank (7). The output end of the heat absorption pipe (4) is connected to a heat preservation pipe (24). The output end of the heat preservation pipe (24) is connected to the top of the water tank (7).

Images