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Braze welding heating furnace of aluminum alloy plate-fin heat exchanger and heating partitioning and control methods

A technology of finned heat exchangers and aluminum alloy plates, applied in metal processing equipment, electric heating devices, manufacturing tools, etc., can solve the problems of large fluctuations in product quality, high energy consumption, and a large number of heat exchangers, and achieve excellent The effect of saving performance and good operability

Inactive Publication Date: 2012-08-01
HANGZHOU HANGYANG
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At the same time, each large-scale air separation unit requires a large number of heat exchangers. If manual brazing is relied on, the product quality will fluctuate greatly and the energy consumption will be high.

Method used

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  • Braze welding heating furnace of aluminum alloy plate-fin heat exchanger and heating partitioning and control methods
  • Braze welding heating furnace of aluminum alloy plate-fin heat exchanger and heating partitioning and control methods
  • Braze welding heating furnace of aluminum alloy plate-fin heat exchanger and heating partitioning and control methods

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Experimental program
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Effect test

Embodiment

[0021] Embodiment: The heating space 3 (heating chamber) is an all-metal reflective screen structure, which is butted in sections along the length direction. It is assembled by top suspension and bottom roller positioning to facilitate the installation and maintenance of the heating chamber; The layers of reflective screens are assembled, and the joints are staggered with a certain gap. They are fixed on the stainless steel frame, which can reduce thermal deformation. On the premise of ensuring the internal heat insulation performance of the furnace, the structure is simplified to the greatest extent, and the emission is reduced. Gas volume, so that the vacuum degree in the furnace has been well guaranteed. There is a reasonable space between the heating chamber and the inner wall of the furnace, which is convenient for daily maintenance.

[0022] The main support material of the heating structure is made of 0Cr18Ni9Ti stainless steel, and the heating element is made of Cr20Ni...

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PUM

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Abstract

The invention discloses a braze welding heating furnace of an aluminum alloy plate-fin heat exchanger and heating partitioning and control methods. The braze welding heating furnace comprises a horizontal furnace body, wherein a support for placing a workpiece to be brazed is arranged in the furnace body, and a heating device is also arranged in the furnace body and comprises at least four heating areas which are arranged around the position of the workpiece to be brazed in the furnace body. The heating partitioning method comprises the following steps of: partitioning the heating areas on left and right sides of a heating space into upper subareas, middle subareas, lower subareas and eight loops for control, wherein totally 48 heaters are arranged on two side surfaces; and partitioning the heating areas on the top and at the bottom into eight loops according to an eight-loop partitioning mode for control, wherein in one subarea, totally 16 heaters are arranged on the top and at the bottom; and the heating control method comprises the following steps of: dividing the braze welding into three major stages, and subdividing the major stages into thirteen small stages, wherein the first stage belongs to baking and is started from normal temperature until the central temperature of the workpiece is 650 Fahrenheit degrees, the second stage is performed until the central temperature of the workpiece is 1,000 Fahrenheit degrees, and the third stage is performed until the central temperature of the workpiece meets a technological requirement. The braze welding heating furnace has the characteristics of energy saving, high performance and capability of realizing automatic braze welding of a large-volume plate-fin heat exchanger, and has excellent control performance.

Description

technical field [0001] The invention relates to a brazing heating furnace for an aluminum alloy plate-fin heat exchanger, a heating zone and a control method, and belongs to the technical field of vacuum automatic brazing of large-scale aluminum plate-fin heat exchangers. Background technique [0002] During the "Eleventh Five-Year Plan" period, the country realized "four major start-ups", namely coal-to-oil, coal gasification combined power generation (IGCC), liquefied natural gas (LNG) receiving station and smelting reduction ironmaking. Coal gasification projects will be the potential customers with the largest oxygen consumption in the future, and synthetic oil (indirect liquefaction) projects will be the most. A 5 million / a synthetic oil factory needs 1.2 million to 1.3 million m 3 The amount of oxygen per hour; a coal chemical project with 1 million methanol per year requires about 120,000 m of oxygen 3 / h; 400MW IGCC power generation project requires 70,000 m of...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K3/047
Inventor 黄安庭车明明王金宏沙玉鹏
Owner HANGZHOU HANGYANG
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