A molten salt constant temperature system and its application method

A constant temperature system and molten salt technology, applied in the field of heat treatment, can solve the problems of large constant temperature system equipment, poor constant temperature accuracy, complex structure, etc., and achieve the effect of ensuring good operation, reducing the temperature difference between the upper and lower walls, and reducing water level fluctuations.

Active Publication Date: 2022-04-29
QINGDAO SPECIAL STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the large output of wire rods and the huge heat generated, the traditional constant temperature system has huge equipment, complex structure, and poor constant temperature accuracy, which is difficult to meet the requirements

Method used

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  • A molten salt constant temperature system and its application method

Examples

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Comparison scheme
Effect test

Embodiment 1

[0030] This embodiment provides a molten salt constant temperature system, including a molten salt tank 6, a constant temperature working salt tank 1 and a water heat exchange system, the constant temperature working salt tank 1 is provided with a salt-salt heat exchanger 2, and the molten salt The outlet of the tank 6 communicates with the water heat exchange system, the outlet of the water heat exchange system communicates with the salt-salt heat exchanger 2 , and the outlet of the salt-salt heat exchanger 2 communicates with the molten salt tank 6 .

[0031] When the system is working, the temperature of the molten salt in the working salt tank is 560°C. Since high-temperature products (generally above 900°C) directly enter the constant temperature working salt tank 1, the temperature of the molten salt in the working salt tank rises rapidly. The salt-salt heat exchanger 2 is arranged. Low-temperature molten salt (cold salt for short) flows in the heat exchange tube, and 560...

Embodiment 2

[0034] On the basis of Example 1, this embodiment provides a molten salt constant temperature system. The water heat exchange system includes an evaporator 5, a water supply device and a steam drum 10, and the evaporator 5 and the water supply device are connected with each other. The steam drum 10 is connected, and a steam-water circulating pump 8 is installed between the evaporator 5 and the steam drum 10, and the outlet of the steam drum 10 is connected to a heat pipe network;

[0035] The outlet of the molten salt tank 6, the evaporator 5 and the inlet of the salt-salt heat exchanger 2 are sequentially connected through heat tracing pipes.

[0036] Hot salt (about 500°C) at the outlet of salt-salt heat exchanger 2 enters the molten salt tank 6, and is sent to the evaporator 5 through the molten salt pump 7 in the molten salt tank 6 for heat exchange, and the cold salt (about 400°C) at the outlet returns to the salt Salt heat exchanger 2. The water in the steam drum 10 is ...

Embodiment 3

[0038] On the basis of Embodiment 1 or 2, this embodiment provides a molten salt constant temperature system, which also includes a control system, a temperature sensor 1 is provided in the constant temperature working salt tank 1, and the molten salt tank 6 is exchanged with water A molten salt pump 7 is installed on the pipeline between the thermal systems, and the temperature sensor 1, the molten salt pump 7 and the water heat exchange system are all connected to the control system with electrical signals.

[0039] Input various parameters (such as wire quality and temperature, molten salt quality and temperature in constant temperature working salt tank 1, cold salt temperature, outlet hot salt temperature, medium specific heat capacity, density, etc.), and calculate the cold salt temperature through the control system according to the heat exchange formula Mass flow, this part belongs to the prior art. The control system monitors the value of the temperature sensor 1 in r...

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PUM

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Abstract

The invention provides a molten salt constant temperature system and its use method, comprising a molten salt tank, a constant temperature working salt tank and a water heat exchange system, the constant temperature working salt tank is provided with a salt-salt heat exchanger, the outlet of the molten salt tank is connected The heat exchange system is connected, the outlet of the water heat exchange system is connected with the salt-salt heat exchanger, and the outlet of the salt-salt heat exchanger is connected with the molten salt tank. The invention utilizes the low-temperature molten salt to take away the heat of the high-temperature molten salt in the working salt tank, and converts the excess heat into high-temperature steam, thereby achieving the purpose of constant temperature control of the working molten salt, ensuring that the temperature fluctuation of the molten salt is between ±2°C, and at the same time Realized waste heat recovery and utilization. The invention is safe, reliable, simple in structure, stable in performance, energy-saving, environment-friendly and low in cost. By installing a pre-heater between the water supply device and the steam drum, the temperature of the water entering the steam drum can be increased to ensure the good operation of the evaporator; at the same time, it can effectively reduce the fluctuation of the water level in the steam drum, reduce the temperature difference between the upper and lower walls of the steam drum, and reduce the exchange of metals. Variable stress, improve equipment life.

Description

technical field [0001] The invention belongs to the technical field of heat treatment, and in particular relates to a molten salt constant temperature system and an application method thereof. Background technique [0002] In recent years, with the development of the economy, the demand for wire rods has increased sharply, and the consumption of high-end wire rods is increasing day by day. Due to the development of key technologies such as long-span bridge design, civil engineering construction technology, steel box girder and steel wire for bridge cables, major progress has been made in the construction of large bridges, and suspension bridges and cable-stayed bridges have exceeded the kilometer span. With the increase of the span and the number of lanes, the steel wires of the main cables of suspension bridges at home and abroad are in the stage of ultra-high strength development, and the continuous improvement of the tensile strength of the steel wires has become the deve...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F28D20/00F28F27/00
CPCF28D20/0034F28F27/00F28D2020/0047Y02E60/14
Inventor 马海宽李培力隋健谷瑞杰刘慧超寇永乐王冬梅彭磊
Owner QINGDAO SPECIAL STEEL CO LTD
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