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A method for descaling and leak detection of fermenter coils at the same time

A fermenter and coil technology, applied in the field of amino acid fermentation, can solve the problems of low heat exchange efficiency, easy fouling on the inner wall of the coil, increased energy consumption, etc., and achieve the effects of saving manpower, reducing the rate of bacterial contamination, and improving production capacity

Active Publication Date: 2016-03-16
HENAN JULONG BIOLOGICAL ENG CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] The outer wall of the inner coil of the fermentation tank has been subjected to high temperature, high pressure and acid-base environment all year round, and it is easy to perforate, and it is not easy to be found, and it is easy to cause continuous batches of bacterial contamination, resulting in great losses
Due to long-term use, the inner wall of the coil is prone to fouling, resulting in low heat exchange efficiency and increased energy consumption

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] A method for simultaneous descaling and leak detection of fermenter coils, comprising the following steps:

[0025] Step 1. Clean the inside of the fermenter tank with tap water first, open the manhole cover after draining the water, and let air flow into the interior from the bottom of the fermenter tank at a speed of 8m / s. Control the pressure inside the coil to 0.11MPa, stop feeding steam after 30 minutes, the temperature of the steam is 95°C, and let the air flow in until the inner surface of the tank is air-dried;

[0026] Step 2, preparing a nitric acid solution with a volume fraction of 10%, then pumping it into the coil through a high-pressure pump, keeping the pressure of the coil at 0.2Mpa, and circulating the nitric acid solution inside the coil for 2 hours;

[0027] Step 3, take the litmus raw material, dissolve the impurities contained in it with an ethanol solution with a temperature of 40°C and 80% by mass, remove the ethanol solution, and obtain pure lit...

Embodiment 2

[0031] A method for simultaneous descaling and leak detection of fermenter coils, comprising the following steps:

[0032] Step 1. Clean the inside of the fermenter tank with tap water first, open the manhole cover after draining the water, and let air flow from the bottom of the fermenter tank to the inside at a speed of 15m / s. Control the pressure inside the coil to 0.11MPa, stop feeding steam after 30 minutes, the temperature of the steam is 120°C, and let the air flow in until the inner surface of the tank is air-dried;

[0033] Step 2, preparing a nitric acid solution with a volume fraction of 10%, then pumping it into the coil through a high-pressure pump, keeping the coil pressure at 0.2Mpa, and circulating the nitric acid solution for 6 hours inside the coil;

[0034] Step 3: Take the litmus raw material, dissolve the impurities contained in the ethanol solution with a temperature of 55°C and 90% by mass, remove the ethanol solution, and obtain pure litmus powder for s...

Embodiment 3

[0037] A method for simultaneous descaling and leak detection of fermenter coils, comprising the following steps:

[0038] Step 1. Clean the inside of the fermenter tank with tap water first, open the manhole cover after draining the water, and let air flow from the bottom of the fermenter tank to the inside at a speed of 12m / s. Control the internal pressure of the coil to 0.11MPa, stop feeding steam after 30 minutes, the temperature of the steam is 110°C, and feed air until the inner surface of the tank is air-dried;

[0039] Step 2, preparing a nitric acid solution with a volume fraction of 10%, then pumping it into the coil through a high-pressure pump, keeping the pressure of the coil at 0.2Mpa, and circulating the nitric acid solution for 4 hours inside the coil;

[0040] Step 3, take the litmus raw material, dissolve the impurities contained in it with an ethanol solution with a temperature of 48 ° C and 85% by mass, remove the ethanol solution, and obtain pure litmus po...

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PUM

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Abstract

The invention discloses a method for simultaneous descaling and leak detection of a fermentation tank coil. Put high-temperature steam into the coil of the tank; step 2, prepare nitric acid solution and pour it into the coil, and circulate for 2-6 hours; step 3, take the raw material of litmus, dissolve the impurities contained in it with ethanol solution, remove the ethanol solution, and put the pure litmus Dissolve the powder in water, stir, let it stand, and filter, then dilute the filtrate to a mass concentration of 1% to obtain a litmus solution for later use; step 4, take a clean rag, wet it with the litmus solution, and wipe the coil , the place where the blood red appears is the leak, that is to complete the descaling and leak detection of the fermenter coil. On the one hand, the invention can improve the heat exchange efficiency of the coil pipe and reduce energy consumption; on the other hand, it can timely detect the perforation of the coil pipe and repair it in time, thereby greatly reducing the bacteria contamination rate in the workshop.

Description

technical field [0001] The invention belongs to the technical field of amino acid fermentation, and mainly relates to a method for simultaneous descaling and leak detection of coil tubes of fermentation tanks. Background technique [0002] The outer wall of the inner coil of the fermentation tank has been subjected to high temperature, high pressure and acid-base environment all year round, so it is easy to perforate, and it is not easy to be found, and it is easy to cause continuous batches of bacterial contamination, resulting in huge losses. Due to long-term use, the inner wall of the coil is extremely prone to fouling, resulting in low heat exchange efficiency and increased energy consumption. Contents of the invention [0003] The purpose of the present invention is to address the deficiencies in the prior art and provide a method for simultaneous descaling and leak detection of the fermenter coil. The method is simple and effective. On the one hand, it can improve th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F28G9/00G01M3/20
Inventor 邢晓丽刘帅李静
Owner HENAN JULONG BIOLOGICAL ENG CO LTD