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Method for reducing furnace door burning-through of tubular furnace through degreasing alkali washing heat exchanger

A technology for heat exchangers and tube furnaces, applied in furnaces, flushing, furnace components, etc., can solve problems such as burn-through of tube furnace doors, intensified temperature rise of pipes, and poor heat transfer effects, so as to reduce corrosion and prolong Service life and environmental protection effect

Pending Publication Date: 2022-05-06
NANJING POLYTECHNIC INSITUTE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, in the above-mentioned prior art, when the oil-rich heat exchanger is used for a period of time, the oil-rich heat exchanger is contaminated with scale, causing the spiral plates on the oil side and water side inside the oil-rich heat exchanger to corrode to form internal leakage, resulting in poor heat transfer effect after the material is strung together , the temperature of the pipeline along the line from the oil-rich heat exchanger to the tube furnace increases, and the temperature of the tube inside the tube furnace increases.

Method used

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  • Method for reducing furnace door burning-through of tubular furnace through degreasing alkali washing heat exchanger
  • Method for reducing furnace door burning-through of tubular furnace through degreasing alkali washing heat exchanger
  • Method for reducing furnace door burning-through of tubular furnace through degreasing alkali washing heat exchanger

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Embodiment 1

[0036] A method for reducing burn-through of a furnace door of a tubular furnace by cleaning a heat exchanger with degreasing alkali, comprising the following steps: (1) washing the inside of the oil-rich heat exchanger 17 with water through a circulation system, and the water washing time is 30 to 60 minutes;

[0037] (2) NaOH degreasing lye is added to the interior of the oil-rich heat exchanger 17 through the circulation system, and the first alkaline cleaning is performed, and the first alkaline cleaning time is 120 minutes;

[0038] (3) The inside of the oil-rich heat exchanger 17 is washed by adding aqueous solution through the circulation system, and at the same time, the waste liquid after washing is replaced outside the oil-rich heat exchanger 17, and the water washing time is 60-90 minutes;

[0039] (4) A mixed solution containing NaOH degreasing alkali, sodium silicate and trisodium phosphate is added to the inside of the oil-rich heat exchanger 17 through the circul...

Embodiment 2

[0047] A method for reducing burn-through of a furnace door of a tube furnace by cleaning a heat exchanger with degreasing alkali, comprising the following steps: (1) washing the inside of the oil-rich heat exchanger 17 with water through a circulation system, and the water washing time is 60 minutes;

[0048] (2) Add 25kg of NaOH degreasing lye to the interior of the oil-rich heat exchanger 17 through the circulation system, and perform the first alkaline cleaning, and the first alkaline cleaning time is 120 minutes;

[0049] (3) The inside of the oil-rich heat exchanger 17 is rinsed by adding aqueous solution through the circulation system, and at the same time, the waste liquid after washing is replaced outside the oil-rich heat exchanger 17, and the water flushing time is 60 minutes;

[0050](4) Add a mixed solution containing 50kg NaOH degreasing alkali, 25kg sodium silicate, and 25kg trisodium phosphate to the inside of the oil-rich heat exchanger 17 through the circulati...

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Abstract

The invention discloses a method for reducing burning through of a furnace door of a tubular furnace through a degreasing alkali washing heat exchanger, and relates to the field of oil-rich heat exchangers, and the method is characterized in that water washing is conducted in the oil-rich heat exchanger through a circulating system, the water washing time is 30-60 min, the circulating system comprises a water pump, the water pump is connected with a power distribution cabinet and a polytetrafluoroethylene tank, and the polytetrafluoroethylene tank is connected with a water pump. The PTFE groove is connected with a liquid conveying hose and a waste liquid hose, the liquid conveying hose and the waste liquid hose are provided with a first stop valve and a second stop valve respectively, and the liquid conveying hose and the waste liquid hose are communicated into the rich oil heat exchanger, so that corrosion of spiral plates on the oil side and the water side of the rich oil heat exchanger is reduced, and normal work of the heat exchanger is guaranteed. Therefore, the service life of the heat exchanger is prolonged.

Description

technical field [0001] The invention relates to the field of oil-rich heat exchangers, more specifically, it relates to a method for reducing the burn-through of a furnace door of a tube furnace for a degreasing alkali-washed heat exchanger. Background technique [0002] In the rich oil debenzene process, such as Figure 4 According to the existing technology, the rich oil enters the rich oil tank, and the oil in the rich oil tank enters the oil-steam heat exchanger through the rich oil pump along the pipeline, and enters the lean-rich oil heat exchanger when the temperature rises to 75°C. At 155°C, the rich oil enters the tube furnace along the pipeline for heating, and the rich oil enters the debenzene tower after the temperature rises to 185°C. [0003] However, in the above-mentioned prior art, when the oil-rich heat exchanger is used for a period of time, the oil-rich heat exchanger is contaminated with scale, causing the spiral plates on the oil side and water side ins...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F28G9/00F28G15/00F27D1/18F27D21/00
CPCF28G9/00F28G15/003F27D1/18F27D21/00F27D2021/0057
Inventor 周玉青李强
Owner NANJING POLYTECHNIC INSITUTE
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