CN216397554U

CN216397554U - Energy-saving cooling tower of steel rolling mill

Info

Publication number: CN216397554U
Application number: CN202122402858.9U
Authority: CN
Inventors: 薛钟谦; 顾春华
Original assignee: Yunnan Qu Jing Cheng Gang Iron And Steel Group Co ltd
Current assignee: Yunnan Qu Jing Cheng Gang Iron And Steel Group Co ltd
Priority date: 2021-10-07
Filing date: 2021-10-07
Publication date: 2022-04-29
Anticipated expiration: 2031-10-07

Abstract

The utility model discloses an energy-saving cooling tower of a steel mill, which comprises a shell and a first exhaust pipe, wherein the interior of the shell sequentially comprises a first cooling section and a second cooling section from bottom to top, third cooling zone and condensation segment, be provided with the spiral pipe that admits air in the first cooling zone, be provided with first intake pipe and drain pipe on the casing of first cooling zone, be provided with the packing layer in the second cooling zone, be provided with the spiral pipe that admits water on the shells inner wall of third cooling zone, be provided with the inlet tube on the casing of third cooling zone, the top of the spiral pipe that admits water is provided with spray tube and a plurality of shower nozzle, first condenser in the condensation segment includes a plurality of condensing boxes, be provided with the cavity in the condensing box, through communicating pipe intercommunication between the cavity of two adjacent condensing boxes, be provided with second intake pipe and second blast pipe on the casing of condensation segment respectively, be provided with the second fan in the second intake pipe. The utility model has the advantages of less water resource waste, high cooling efficiency, good cooling effect and obvious economic and social values.

Description

Energy-saving cooling tower of steel rolling mill

Technical Field

The utility model relates to the technical field of cooling equipment, in particular to an energy-saving cooling tower of a steel rolling mill.

Background

The billet steel produced from a steel mill is only a semi-finished product, and in order to obtain a qualified steel product, the billet steel must be sent to a steel mill for rolling, and a cooling tower is needed when the billet steel is rolled in the steel mill, and the cooling tower has the function of exchanging heat between circulating water carrying waste heat and air in the tower, transmitting the heat of the circulating water to the air and dissipating the heat into the atmosphere, so that the purpose of reducing the temperature of the circulating water is achieved. When a conventional cooling tower runs, hot water is sprayed to the surface of a filler and contacts with cold air passing through the filler, heat exchange is generated between the hot water and the cold air, meanwhile, part of the hot water is evaporated, and finally, the cooled water falls into a water pool; secondly, the existing cooling towers directly spray circulating hot water for cooling, and the circulating hot water is directly discharged after being cooled, and in the process, the circulating hot water is often discharged without being sufficiently cooled, so that the cooling effect is poor, and the circulating hot water is often cooled again; finally, the existing cooling tower mostly uses a single fan to dissipate heat during operation, and the cooling efficiency is not high. Therefore, it is an objective need to develop an energy-saving cooling tower with less water resource waste, high cooling efficiency and good cooling effect for steel rolling mills.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide an energy-saving cooling tower of a steel mill, which has the advantages of less water resource waste, high cooling efficiency and good cooling effect.

The utility model aims to realize the purpose, which comprises a shell and a first exhaust pipe arranged at the top of the shell, wherein the shell comprises a first cooling section, a second cooling section, a third cooling section and a condensing section from bottom to top in sequence, an air inlet spiral pipe is arranged in the first cooling section, a first air inlet pipe and a drain pipe are arranged on the shell of the first cooling section, a first fan is arranged on the first air inlet pipe, the end part of the first air inlet pipe extends into the first cooling section and then is communicated with the inlet end of the bottom of the air inlet spiral pipe, a plurality of air outlet holes are uniformly distributed on the circumference of the top of a circle of ring pipe at the top of the air inlet spiral pipe, a packing layer is arranged in the second cooling section, an air inlet spiral pipe is arranged on the inner wall of the shell of the third cooling section, a water inlet pipe is arranged on the shell of the third cooling section, a water pump is arranged on the water inlet pipe, the end part of the water inlet pipe extends into the third cooling section and then is communicated with the inlet end of the bottom of the water inlet spiral pipe, the top of the spiral pipe of intaking is provided with the spray tube, the bottom equipartition of spray tube has a plurality of shower nozzles, the spray tube is the open structure of one end shutoff one end, the exit end intercommunication at one end shutoff one end with the spiral pipe top of intaking after the opening end of spray tube is bent, be provided with first condenser in the condensation segment, first condenser includes the condensation box of a plurality of rectangular shapes that incline the setting side by side, be provided with the cavity along the length direction of condensation box in the condensation box, communicate through communicating pipe between the cavity of two adjacent condensation boxes, be provided with second intake pipe and second blast pipe on the casing that the condensation segment is relative respectively, be provided with the second fan in the second intake pipe, the tip of second intake pipe and second blast pipe is stretched into in the condensation segment after respectively with the cavity intercommunication that is located two condensation boxes in the outside.

Furthermore, a dehumidifier is arranged in the first exhaust pipe.

Furthermore, a second condenser is arranged in the condensing section above the first condenser, the structure of the second condenser is the same as that of the first condenser, the inclination direction of a condensing box in the second condenser is opposite to that of the condensing box in the first condenser,

furthermore, a plurality of heat conducting strips are arranged on the outer wall of the condensing box.

Furthermore, the communicating pipes are positioned at one end between two adjacent condensing boxes, and the two adjacent communicating pipes are arranged in a staggered mode.

Furthermore, the shell diameter of the condensing section is larger than that of the third cooling section, and the lower end of the condensing section is connected with the upper end of the third cooling section through a necking cone.

Further, the air inlet spiral pipe and the water inlet spiral pipe are finned pipes.

When the utility model is operated, the air flow process is as follows: under the action of a first fan, air with lower temperature is conveyed into an air inlet spiral pipe through a first air inlet pipe, then is discharged from an air outlet hole at the top of the air inlet spiral pipe, sequentially enters a third cooling section and a condensing section after passing through a packing layer, and finally is discharged from a first air outlet pipe; the flow process of the hot water is as follows: under the action of a water pump, hot water is conveyed into the water inlet spiral pipe from the water inlet pipe, then enters the spray pipe, is sprayed out after being atomized by the spray head, falls into the first cooling section at the bottom of the shell after falling to the packing layer, and is finally discharged from the water discharge pipe; the hot water cooling principle is as follows: in the first cooling section, the air with lower temperature absorbs the hot water heat at the bottom of the shell through the air inlet spiral pipe, in the second cooling section, the air is contacted with the hot water in the packing layer, the air absorbs the hot water heat, in the third cooling section, when the hot water flows in the water inlet spiral pipe, the air absorbs the heat emitted by the water inlet spiral pipe, then the hot water is sprayed out from the spray head to form mist water drops, and the mist water drops are in reverse contact with the air flowing upwards to exchange heat again. Through the multiple heat exchange processes, the air gradually absorbs heat and cools the hot water for multiple times, so that the temperature of the water discharged from the water discharge pipe can meet the technological requirements, the cooling effect is good, and the cooling efficiency is high; secondly, the steam that produces in above-mentioned each heat exchange process rises constantly, and when these steam met the condenser, the air in each cavity cooled down the condensation to steam for steam condensation forms the water droplet and constantly drips, avoids moisture to discharge along with the air, plays the effect of water economy resource, reaches the purpose of reclaimed water resource. The utility model has the advantages of less water resource waste, high cooling efficiency, good cooling effect and obvious economic and social values.

Drawings

FIG. 1 is a schematic view of the overall structure of the present invention;

FIG. 2 is a schematic top view of a first condenser according to the present invention;

in the figure: 1-shell, 2-first exhaust pipe, 3-first cooling section, 4-second cooling section, 5-third cooling section, 6-condensation section, 7-air inlet spiral pipe, 8-first air inlet pipe, 9-water outlet pipe, 10-first fan, 11-packing layer, 12-water inlet spiral pipe, 13-water inlet pipe, 14-water pump, 15-spray pipe, 16-spray head, 17-condensation box, 18-cavity, 19-communicating pipe, 20-second air inlet pipe, 21-second exhaust pipe, 22-second fan, 23-dehumidifier, 24-heat conducting strip and 25-necking cone.

Detailed Description

The present invention is further described with reference to the drawings, but the present invention is not limited thereto in any way, and any modification or improvement based on the present invention is within the protection scope of the present invention.

As shown in figures 1-2, the utility model comprises a shell 1 and a first exhaust pipe 2 arranged on the top of the shell 1, the shell 1 comprises a first cooling section 3, a second cooling section 4, a third cooling section 5 and a condensation section 6 from bottom to top in sequence, an air inlet spiral pipe 7 is arranged in the first cooling section 3, a first air inlet pipe 8 and a drain pipe 9 are arranged on the shell 1 of the first cooling section 3, a first fan 10 is arranged on the first air inlet pipe 8, the end part of the first air inlet pipe 8 extends into the first cooling section 3 and then is communicated with the inlet end at the bottom of the air inlet spiral pipe 7, a plurality of air outlet holes are uniformly distributed on the top circumference of the ring pipe at the top of the air inlet spiral pipe 7, a packing layer 11 is arranged in the second cooling section 4, an air inlet spiral pipe 12 is arranged on the inner wall of the shell 1 of the third cooling section 5, a water inlet pipe 13 is arranged on the shell of the third cooling section 5, and a water pump 14 is arranged on the water inlet pipe 13, the tip of inlet tube 13 stretches into the third cooling zone 5 in back and the entrance point intercommunication of the spiral pipe 12 bottom of intaking, the top of spiral pipe 12 of intaking is provided with spray tube 15, the bottom equipartition of spray tube 15 has a plurality of shower nozzles 16, spray tube 15 is the open structure of one end shutoff one end, the open end of spray tube 15 is bent back and is linked together with the exit end at the spiral pipe 12 top of intaking, be provided with first condenser in the condensation zone 6, first condenser includes the condensation box 17 of a plurality of rectangular shapes that incline side by side and set up, be provided with cavity 18 along the length direction of condensation box 17 in the condensation box 17, communicate through communicating pipe 19 between the cavity 18 of two adjacent condensation boxes 17, be provided with second intake pipe 20 and second blast pipe 21 on the casing 1 that condensation zone 6 is relative respectively, be provided with second fan 22 on the second intake pipe 20, the tip of second exhaust pipe 20 and second blast pipe 21 stretches into in the condensation zone 6 after respectively with the cavity 18 that is located two condensation boxes 17 in the outside. In actual operation, the first fan 10 and the second fan 22 can select special axial flow fans, the filler of the filler layer 11 can select clean ring water filler, the modified PVC film filler is adopted, the thickness of the sheet is 0.4 +/-0.05 mm, and the water distribution device has the advantages of large surface area, strong water distribution capacity, small resistance and the like.

When the utility model is operated, the air flow process is as follows: under the action of a first fan 10, air with lower temperature is conveyed into an air inlet spiral pipe 7 through a first air inlet pipe 8, then is discharged from an air outlet hole at the top of the air inlet spiral pipe 7, sequentially enters a third cooling section 5 and a condensing section 6 after passing through a packing layer 11, and finally is discharged from a first air outlet pipe 2, meanwhile, under the action of a second fan 22, air with lower temperature is conveyed into a cavity 18 of one condensation box 17 at the outermost side through a second air inlet pipe 20, then sequentially enters the rest cavities 18, and finally is discharged from a second air outlet pipe 21; the flow process of the hot water is as follows: under the action of a water pump 14, hot water is conveyed into a water inlet spiral pipe 12 from a water inlet pipe 13, then enters a spray pipe 15, is atomized by a spray head 16 and then is sprayed out, falls into a first cooling section 3 at the bottom of a shell 1 after falling to a packing layer 11, and finally is discharged from a water discharge pipe 9; the hot water cooling principle is as follows: in the first cooling section 3, the air with lower temperature absorbs the heat of the hot water at the bottom of the shell 1 through the air inlet spiral pipe 7, in the second cooling section 4, the air is contacted with the hot water in the packing layer 11, the air absorbs the heat of the hot water, in the third cooling section 5, when the hot water flows in the water inlet spiral pipe 12, the air absorbs the heat emitted by the water inlet spiral pipe 12, and then the hot water is sprayed out from the spray head 16 to form mist-shaped water drops which are reversely contacted with the air flowing upwards to exchange heat again. Through the multiple heat exchange processes, the air gradually absorbs heat and cools the hot water for multiple times, so that the temperature of the water discharged from the water discharge pipe 9 can meet the technological requirements, the cooling effect is good, and the cooling efficiency is high; secondly, the steam generated in each heat exchange process continuously rises, and when the steam enters the condensation section 6, the air in the cavity 18 in each condensation box 17 cools and condenses the steam, so that the steam condenses to form water drops and continuously drops, the water is prevented from being discharged along with the air, the effect of saving water resources is achieved, and the purpose of recovering water resources is achieved.

Be provided with dehumidifier 23 in the first exhaust pipe 2, dehumidifier 23 is prior art, can further detach the moisture in the air, reduces the waste of water resource.

Be provided with the second condenser in the condensation segment 6 of first condenser top, the structure of second condenser is the same with the structure of first condenser, the incline direction of condensing box 17 in the second condenser is opposite with the incline direction of condensing box 17 in the first condenser, when the air rises, earlier through first condenser, pass through the second condenser again, can carry out twice condensation to the steam in the air, improve the condensation effect of steam, and the incline direction of condensing box 17 is opposite in two condensers, make the air take place the baffling when rising, thereby improve the condensing efficiency of steam.

Be provided with many heat conduction strips 24 on the outer wall of condensing box 17, increase the surface area of condensing box 17 through heat conduction strip 24 to increase air and hydrothermal heat transfer area, finally improve heat exchange efficiency, promote the quick-reading condensation of steam.

The communicating pipes 19 are positioned at one end between the two adjacent condensing boxes 17, the two adjacent communicating pipes 19 are arranged in a staggered mode, the communicating pipes 19 arranged in a staggered mode can enable air to flow uniformly in the cavity 18 of each condensing box 17, the generation of flowing dead zones of the air is prevented, and a good heat exchange effect between the air and steam is guaranteed.

The 1 diameter of casing of condensation segment 6 is greater than the 1 diameter of casing of third cooling segment 5, and be connected through throat awl 25 between the lower extreme of condensation segment 6 and the upper end of third cooling segment 5, the cross sectional area from the bottom up of throat awl 25 crescent, cross sectional area increases to the biggest when arriving condensation segment 6, when the air that contains steam constantly rises in throat awl 25, because cross sectional area grow gradually, the velocity of flow of air will diminish gradually, thereby the flow time of extension air in condensation segment 6, make the air in condensing box 17 can have sufficient time and steam to take place the heat exchange, thereby reduce steam temperature, promote the condensing rate of steam.

The air inlet spiral pipe 7 and the water inlet spiral pipe 12 are finned pipes, fins are arranged on the outer walls of the finned pipes, the surface area of the finned pipes can be increased, the heat exchange area of air and hot water is increased, and finally the heat exchange efficiency is improved.

Claims

1. An energy-saving cooling tower of a steel rolling mill is characterized by comprising a shell (1) and a first exhaust pipe (2) arranged at the top of the shell (1), wherein the shell (1) sequentially comprises a first cooling section (3), a second cooling section (4), a third cooling section (5) and a condensation section (6) from bottom to top, an air inlet spiral pipe (7) is arranged in the first cooling section (3), a first air inlet pipe (8) and a drain pipe (9) are arranged on the shell (1) of the first cooling section (3), a first fan (10) is arranged on the first air inlet pipe (8), the end part of the first air inlet pipe (8) extends into the first cooling section (3) and then is communicated with the inlet end of the bottom of the air inlet spiral pipe (7), a plurality of air outlet holes are uniformly distributed on the top circumference of a circle of the uppermost ring pipe of the air inlet spiral pipe (7), a packing layer (11) is arranged in the second cooling section (4), be provided with into water spiral pipe (12) on casing (1) inner wall of third cooling zone (5), be provided with inlet tube (13) on the casing of third cooling zone (5), be provided with water pump (14) on inlet tube (13), the tip of inlet tube (13) stretches into in third cooling zone (5) back and the entrance point intercommunication of intaking spiral pipe (12) bottom, the top of intaking spiral pipe (12) is provided with spray tube (15), and the bottom equipartition of spray tube (15) has a plurality of shower nozzles (16), and spray tube (15) are the open structure of one end shutoff, and the exit end intercommunication at the back and the spiral pipe (12) top of intaking after the opening end of spray tube (15) bends, be provided with first condenser in condensation segment (6), first condenser includes a plurality of condensation boxes (17) of the rectangular shape that slope set up side by side, is provided with cavity (18) along the length direction of condensation boxes (17) in condensation boxes (17), the cavities (18) of two adjacent condensing boxes (17) are communicated through a communicating pipe (19), a second air inlet pipe (20) and a second air outlet pipe (21) are respectively arranged on the shell (1) opposite to the condensing section (6), a second fan (22) is arranged on the second air inlet pipe (20), and the end parts of the second air inlet pipe (20) and the second air outlet pipe (21) extend into the condensing section (6) and then are respectively communicated with the cavities (18) located at the two outermost condensing boxes (17).

2. The energy-saving cooling tower of a steel mill according to claim 1, characterized in that a dehumidifier (23) is provided in the first exhaust pipe (2).

3. The energy-saving cooling tower of steel mill according to claim 1, wherein a second condenser is arranged in the condensing section (6) above the first condenser, the structure of the second condenser is the same as that of the first condenser, and the inclination direction of the condensing box (17) in the second condenser is opposite to that of the condensing box (17) in the first condenser.

4. The energy-saving cooling tower of a steel mill according to claim 1, characterized in that a plurality of heat conducting strips (24) are arranged on the outer wall of the condensation box (17).

5. The energy-saving cooling tower of a steel mill according to claim 1, characterized in that the communicating pipes (19) are positioned at one end between two adjacent condensing tanks (17), and two adjacent communicating pipes (19) are arranged in a staggered manner.

6. The energy-saving cooling tower of a steel mill according to claim 1, characterized in that the diameter of the shell (1) of the condensing section (6) is larger than that of the shell (1) of the third cooling section (5), and the lower end of the condensing section (6) is connected with the upper end of the third cooling section (5) through a necking cone (25).

7. The energy-saving cooling tower of a steel mill according to claim 1, characterized in that the air inlet spiral pipe (7) and the water inlet spiral pipe (12) are finned pipes.