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A kind of flash steam cleaning method

A technology of flash steam and steam, which is applied in the field of flash steam cleaning, and can solve problems such as long steam injection time, large steam flow rate, and steam consumption

Active Publication Date: 2019-03-19
CHINA TOBACCO SICHUAN IND CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This cleaning method has the following problems: 1. The steam flow rate is large, and the steam flow rate is greater than the minimum steam flow rate required to complete the cleaning process, resulting in unnecessary steam consumption; 2. The steam injection time is long, and the cleaning time lasts until the fluidized bed is preheated At the end, the steam injection duration is longer than the minimum injection time required to complete the cleaning process, resulting in unnecessary steam consumption; 3. High-pressure steam is injected in the Venturi tube, which is prone to high-decibel noise

Method used

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  • A kind of flash steam cleaning method

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Effect test

Embodiment 1

[0021] see figure 1 , figure 1 A flow chart of a flash steam cleaning method is provided for the present invention.

[0022] The invention discloses a flash steam cleaning method, comprising the following steps:

[0023] Step S1: Open the steam membrane valve, pressurize and inject the venturi tube, the injection time is between 45s and 65s, and the opening of the steam membrane valve is between 45% and 60%.

[0024] When starting cleaning, due to the large amount of material, the steam membrane valve is adjusted to a large opening. Here, the inventor has obtained through experiments that the opening of the steam membrane valve is greater than or equal to 45%, and the opening of the steam membrane valve is less than or equal to 60%. , the pressurized injection to the Venturi tube can be realized, and the injection time is greater than 45s and less than 65s.

[0025] Step S2: Close the steam membrane valve and stop spraying for 15s to 20s.

[0026] Close the steam membrane ...

Embodiment 2

[0042] In yet another embodiment provided by the present invention, the flash steam cleaning method in this embodiment is similar to the flash steam cleaning method in Embodiment 1, and the similarities will not be repeated, and only the differences will be introduced.

[0043] In this embodiment, the inventor has obtained through multiple tests that the preset time in step S5 is 150 s, and the preset number of times in step S6 is 9 times, the blowing and cleaning of the venturi tube can be realized.

[0044] In the present embodiment, the opening of the steam film valve in step S1 is 45%, and the blowing time is 65s; the opening of the steam film valve in step S3 is 30%, and the blowing time is 65s; in steps S2 and S4 The closing time is 20s as an example for illustration.

[0045] After testing, the steam consumption of a single batch is about 65.5kg in the method of this embodiment; while the steam consumption of a single batch in the prior art is about 581.4kg, compared wi...

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Abstract

The invention discloses a flash steam cleaning method. A subsection cleaning method is adopted, firstly, pressurized injection is performed, opening of a steam film valve is in a range from 45% to 60% during pressurized injection, a part of a material in a venturi tube is rapidly blown out, the material in the venturi tube is reduced, then injection is performed again, the opening of the steam film valve is in a range from 25% to 35% during injection, and the injection intensity is divided into two sections, so that unnecessary steam consumption is reduced; besides, the opening of the steam film valve is reduced, and accordingly, noise in the venturi tube is also reduced. Additionally, injection is stopped once the condition that all the material is blown out or the venturi tube is blocked severely is detected, so that the injection time is shortened, and the injection flow is reduced.

Description

technical field [0001] The invention relates to the tobacco industry, in particular to a flash steam cleaning method. Background technique [0002] The flash evaporator is an important equipment in the expansion drying process of the tobacco industry's silk production line. Before the flash evaporator is produced, the Venturi tube needs to be cleaned first. The cleaning process is: high-pressure steam blows the Venturi tube. Water is injected from the Venturi tube to the outside of the flash steam body to ensure the purity of the material during the production process. [0003] At present, the flash evaporator is cleaned by manual control, that is, the steam membrane valve is manually opened for blowing. Usually, the opening of the membrane valve during the cleaning process is 60%, and the steam flow rate is 1150kg / h at this time; the cleaning time lasts until the fluidized bed ( The downstream equipment of the flash steam) is preheated and transferred to the production pr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B08B9/032
CPCB08B9/0325B08B9/0328B08B2209/032
Inventor 丁岩廖晓宁黄亮郭睿涵刘静远
Owner CHINA TOBACCO SICHUAN IND CO LTD
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