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Boiler drying temperature control module and its control method

A technology for controlling components and boiler furnace walls, which is applied in the direction of reducing gas emissions and lining repair. It can solve the problems of difficulty in controlling the initial temperature, large linear expansion of high-alumina bricks, and the speed cannot be too fast, so as to ensure the quality of the oven, The temperature field is uniformly distributed and the effect of avoiding temperature fluctuations

Inactive Publication Date: 2012-11-07
BAOSTEEL STAINLESS STEEL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

During the drying process, it was found that the temperature in the low-temperature section should not be controlled, the heating temperature of heavy oil is about 100°C, and the initial temperature is difficult to control. However, due to the influence of the heating curve of the refractory high-alumina brick in the oven of the heavy-duty furnace wall boiler, the linearity of the high-alumina brick Large expansion, especially at 150°C, the amount of dehydration is large, and the rate should not be too fast

Method used

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  • Boiler drying temperature control module and its control method
  • Boiler drying temperature control module and its control method
  • Boiler drying temperature control module and its control method

Examples

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Effect test

Embodiment 1

[0036] The first-stage oven adopts a high-load oven (high-load oven: the average daily temperature rise ranges from 35°C to 45°C, excluding 35°C), with a daily temperature rise of 40°C, and the oven lasts for 4 days. The steam cooling pipe 2 of the oven adopts a three-dimensional arrangement, and the steam is superheated steam, and its parameters are as follows: P=1.4MPa, T=230°C, M=1200Kg / h. At the same time, through feedback control, that is, fine-tuning the furnace temperature through the first flow control valve 1 and the second flow control valve 3, it is ensured that the oven is strictly in accordance with the oven curve (oven curve: the heating rate, heat preservation Time, the graph represented by time-temperature is called the oven curve). In the second stage, the burner 6 is baked with natural gas at a small fire. The temperature inside the boiler wall 5 rises by 30°C every day, and the oven lasts for 2 days. This stage is also controlled by small flow feedback, that...

Embodiment 2

[0039] The first-stage oven adopts a medium-load oven (medium-load oven: the average daily temperature rise ranges from 25°C to 35°C, excluding 25°C), with a daily temperature rise of 30°C, and the oven lasts for 4.5 days. The steam cooling pipe 2 of the oven adopts a three-dimensional arrangement, and the steam is superheated steam, and its parameters are as follows: P=1.6MPa, T=250°C, M=1000Kg / h. At the same time, through feedback control, that is, through the first flow control valve 1 and the second flow control valve 3, the furnace temperature is fine-tuned to ensure that the oven is strictly in accordance with the oven curve. In the second stage, the burner 6 is baked by natural gas with a small fire. The temperature inside the boiler wall 5 rises by 40°C every day, and the oven lasts for 1.5 days. This stage is also controlled by small flow feedback, that is, through the third flow control valve 8 pairs The furnace temperature is controlled.

[0040] After the first an...

Embodiment 3

[0042] The first-stage oven adopts a low-load oven (low-load oven: the average daily temperature rise ranges from 15°C to 25°C, excluding 15°C), with a daily temperature rise of 25°C, and the oven lasts for 5 days. The steam cooling pipe 2 of the oven adopts a three-dimensional arrangement, and the steam is superheated steam, and its parameters are as follows: P=1.8MPa, T=270°C, M=800Kg / h. At the same time, through feedback control, that is, through the first flow control valve 1 and the second flow control valve 3, the furnace temperature is fine-tuned to ensure that the oven is strictly in accordance with the oven curve. In the second stage, the burner 6 is baked with natural gas on a small fire. The temperature inside the boiler wall 5 rises by 50°C every day, and the oven lasts for one day. This stage is also controlled by small flow feedback, that is, through the third flow control valve 8 pairs The furnace temperature is controlled.

[0043] After the first and second s...

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Abstract

The invention relates to a boiler drying temperature control module. The control module comprises a temperature measurement unit arranged at an inner side of a boiler wall. The control module is characterized in that a vapor heat dissipation pipe and a burner nozzle are arranged at the inner side of the boiler wall, and the vapor heat dissipation pipe is provided with a first flow control valve at an inlet end and a second flow control valve at an outlet end. Meanwhile, the invention also provides a method for controlling a boiler drying temperature by using the boiler drying temperature control module. The control module and method carry out drying by using vapor produced by a boiler without using novel special drying apparatus, simplify a drying process, ensure uniform distribution of a temperature field, achieve online regulation of a heating rate, and guarantee a boiler drying effect.

Description

technical field [0001] The invention relates to a control assembly and a control method thereof, in particular to a boiler oven temperature control assembly and a control method thereof, which are mainly applicable to 20-75 ton heavy furnace wall steam boilers. Background technique [0002] For boilers with heavy furnace walls (boilers with heavy furnace walls: the furnace wall is directly built on the boiler foundation, that is, the weight of the furnace wall is directly borne by the boiler wall foundation, and the furnace wall is composed of two layers of refractory bricks and red bricks.) A large amount of refractory and wear-resistant lining materials should be laid in the furnace, and a large amount of water is absorbed in the furnace wall materials and during the masonry process, resulting in a large amount of free water and crystal water after the furnace lining castables are completed. These free water and crystal water If it is in contact with high-temperature flue ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F27D1/16
CPCY02P10/143
Inventor 董永涛申筑
Owner BAOSTEEL STAINLESS STEEL
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