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CN-224230737-U - Steelmaking continuous casting machine waste heat recovery utilizes device

CN224230737UCN 224230737 UCN224230737 UCN 224230737UCN-224230737-U

Abstract

The utility model discloses a steelmaking continuous casting machine waste heat recycling device which comprises a conveying pipe and a heat exchanger, wherein an annular blocking plate is arranged at the inlet end of a casting blank of the conveying pipe, a plurality of annular cavities are sequentially arranged in the conveying pipe from the inlet end of the casting blank to the outlet end of the casting blank at intervals, each annular cavity is connected with a cold air pipe, a plurality of air nozzles are uniformly distributed on the circumference of the side wall of the annular cavity facing one side of the annular blocking plate, a cooling cavity is formed between adjacent annular cavities and between the annular blocking plate and the annular cavity, a plurality of conveying rollers are arranged in the cooling cavity, an exhaust pipe is arranged on the side wall of the cooling cavity close to one side of the annular blocking plate, a heat exchange pipe assembly is arranged in the heat exchanger, the exhaust pipe is communicated with the inlet of the heat exchange pipe assembly, water supplementing ports are arranged on the heat exchanger, the outer side of the conveying pipe is provided with a communicated air compressor and a vortex pipe, and the cold air outlet of the vortex pipe is communicated with each cold air pipe. In conclusion, the utility model has the advantages of less heat loss, high casting efficiency and high heat recovery rate.

Inventors

  • LIU WEI
  • LIU ZHIHUA
  • Dai Xingxu

Assignees

  • 云南曲靖钢铁集团呈钢钢铁有限公司

Dates

Publication Date
20260512
Application Date
20250606

Claims (7)

  1. 1. A steelmaking continuous casting machine waste heat recycling device comprises a conveying pipe (1) and a heat exchanger (2), and is characterized in that an annular blocking plate (3) is arranged at the inlet end of a casting blank of the conveying pipe (1), a plurality of annular cavities (4) are sequentially arranged in the conveying pipe (1) from the inlet end of the casting blank to the outlet end of the casting blank at intervals, cold air pipes (5) are connected to each annular cavity (4), a plurality of air jet ports (6) are uniformly distributed on the circumference of the side wall of the annular cavity (4) towards one side of the annular blocking plate (3), a cooling cavity is formed between every two adjacent annular cavities (4), a plurality of conveying rollers (17) are arranged in the cooling cavity, an exhaust pipe (7) is arranged on the side wall of the cooling cavity close to one side of the annular blocking plate (3), a heat exchange pipe assembly (8) is arranged in the heat exchanger (2), the exhaust pipe (7) is communicated with the inlet of the heat exchange pipe assembly (8), a plurality of air jet ports (9) and vortex pipes (10) are uniformly distributed on the side wall of the annular cavity (4) towards one side of the annular blocking plate (3), and the outer side of the conveying pipe (1) is communicated with the vortex pipe (10).
  2. 2. The waste heat recycling device of the steelmaking continuous casting machine, as set forth in claim 1, wherein a steam drum (11) is arranged above the heat exchanger (2), a water vapor conveying pipe at the top of the heat exchanger (2) is communicated with a steam inlet of the steam drum (11), and a condensed water outlet of the steam drum (11) is communicated with the heat exchanger (2).
  3. 3. The waste heat recycling device of a steelmaking continuous casting machine according to claim 1, wherein a gas mixer (12) is arranged on a connecting pipeline between the exhaust pipe (7) and the heat exchange pipe assembly (8).
  4. 4. A steel-making continuous casting machine waste heat recycling device according to claim 3, wherein the hot gas outlet of the vortex tube (10) is communicated with the gas mixer (12).
  5. 5. The waste heat recycling device of a steelmaking continuous casting machine as claimed in claim 1, wherein the air nozzles (6) are obliquely arranged, and the oblique direction faces the central line direction of the conveying pipe (1).
  6. 6. The steelmaking continuous casting machine waste heat recycling device according to claim 1, wherein the outer wall of the conveying pipe (1) is provided with a jacket (13), the jacket (13) close to the casting blank outlet end side of the conveying pipe (1) is provided with a water inlet (14), the jacket (13) close to the casting blank inlet end side of the conveying pipe (1) is provided with a water outlet (15), and the water outlet (15) is communicated with the water supplementing port of the heat exchanger (2).
  7. 7. The waste heat recycling device of a steelmaking continuous casting machine according to claim 1, wherein a stirrer (16) is arranged in the heat exchanger (2) below the heat exchange tube assembly (8).

Description

Steelmaking continuous casting machine waste heat recovery utilizes device Technical Field The utility model relates to the technical field of waste heat recovery, in particular to a waste heat recovery and utilization device of a steelmaking continuous casting machine. Background The process of continuously casting high-temperature molten steel into casting blanks with certain section shape and certain size is called continuous casting. The process is completed by using continuous casting complete equipment, and the mechanical and electrical integration of steel casting equipment, continuous caster body equipment, cutting area equipment and dummy bar collecting and conveying equipment forms continuous casting core equipment, so that the continuous caster is conventionally formed. In the production process of the continuous casting machine, after leaving the cooling spray device in the secondary cooling chamber, 2-6 meters of casting blanks are still exposed in the secondary cooling chamber, the temperature of the casting blanks can reach about 800 ℃, the temperature of the casting blanks is still about 600 ℃ when the casting blanks run to the position of the roller way before cutting, the ambient temperature of heat radiation near the casting machine exceeds 200 ℃, a steam exhaust fan is generally adopted in the design of the existing casting machine to exhaust the heat of part of the secondary cooling chamber outside the plant, but the roller way position only adopts natural heat dissipation of the environment. The continuous casting process has the following problems that a large amount of heat is not effectively utilized due to natural heat dissipation when a casting blank is positioned at a roller way, heat loss and waste are caused, the natural heat dissipation speed of the casting blank is low, casting efficiency is low, and the method can lead the cooling speed of the casting blank facing to the cold air side to be high, the cooling speed of the casting blank facing away from the cold air side to be low, and meanwhile, the recovery rate of waste heat is low, and a large amount of heat is wasted. Therefore, the device for recycling the waste heat of the steelmaking continuous casting machine, which has the advantages of less heat loss, high casting efficiency and high heat recovery rate, is objectively needed. Disclosure of utility model The utility model aims to provide a steelmaking continuous casting machine waste heat recycling device with less heat loss, high casting efficiency and high heat recovery rate. The utility model aims at realizing the purposes, the device comprises a conveying pipe and a heat exchanger, wherein an annular blocking plate is arranged at the inlet end of a casting blank of the conveying pipe, a plurality of annular cavities are sequentially arranged in the conveying pipe from the inlet end of the casting blank to the outlet end of the casting blank at intervals, each annular cavity is connected with a cold air pipe, a plurality of air nozzles are uniformly distributed on the circumference of the side wall of the annular cavity facing one side of the annular blocking plate, a cooling cavity is formed between adjacent annular cavities and between the annular blocking plate and the annular cavity, a plurality of conveying rollers are arranged in the cooling cavity, an exhaust pipe is arranged on the side wall of the cooling cavity near one side of the annular blocking plate, a heat exchange pipe assembly is arranged in the heat exchanger, the exhaust pipe is communicated with the inlet of the heat exchange pipe assembly, a water supplementing port is arranged on the heat exchanger, the outer side of the conveying pipe is provided with a communicated air compressor and a vortex pipe, and the cold air outlet of the vortex pipe is communicated with each cold air pipe. Further, a steam drum is arranged above the heat exchanger, a water vapor conveying pipe at the top of the heat exchanger is communicated with a steam inlet of the steam drum, and a condensed water outlet of the steam drum is communicated with the heat exchanger. Further, a gas mixer is arranged on the connecting pipeline between the exhaust pipe and the heat exchange pipe assembly. Further, a hot gas outlet of the vortex tube is in communication with the gas mixer. Further, the air jet is obliquely arranged, and the oblique direction faces the central line direction of the conveying pipe. Further, a jacket is arranged on the outer wall of the conveying pipe, a water inlet is arranged on the jacket near one side of the casting blank outlet end of the conveying pipe, a water outlet is arranged on the jacket near one side of the casting blank inlet end of the conveying pipe, and the water outlet is communicated with the water supplementing port of the heat exchanger. Further, a stirrer is arranged in the heat exchanger below the heat exchange tube assembly. When the continuous casting machine is in operation, the c