What to do if the sulfur dioxide residue exceeds the standard

You need to understand that different food testing items are different. First of all, this is determined by the different food production and processing technology, the use of sulfur fumigation, the addition of sulfite is used for bleaching and preservative. For example, yuba, daylily, flower tea, canned enoki mushrooms, wolfberry, white melon seeds, preserved fruit preserves, red wine, etc., these foods are easy to use sulfur dioxide additives in order to look good in color and shelf life, and in addition, the "Hygienic Standard for the Use of Food Additives" (GB2760-2007) stipulates that sulfites can be added or sulfur fumigation is used, and the detection indicators are sulfur dioxide residues.

Some companies are not standardized enough, and the amount of addition is not well mastered, and it is easy to exceed the standard.

There are many types of pesticide residues, and pesticide residues need to be detected for vegetables, fruits, tea, etc. They are grown in soil, some use pesticide residues that are not allowed to be used, and some are sold on the market without a 7-day pesticide safety decomposition period, which can be detected.

Of course, the testing agency only guesses what kind of problems may occur in the food, and it is impossible to check hundreds or thousands of indicators, one is not necessary, and the other is not so much manpower and energy.

So, the conclusion is, when you make food, you first have to understand food.

On the one hand, it is necessary to reduce the emission of sulfur dioxide and other sulfides, and on the other hand, it is necessary to plant more trees, purify the atmosphere by means of greening, and reduce the amount of sulfur dioxide in the air. Specifically, the use of low-sulphur fuels is one of the most effective ways to reduce sulphur dioxide emissions; Desulfurization is used for fuels with high sulfur content;

Add desulfurizer to remove sulfur during fuel combustion; Emission flue gas desulfurization, flue gas desulfurization can be roughly divided into two categories. One is the wet method: the method of using liquid absorbent to scrub the flue gas;

The second type is dry method: sulfur dioxide is removed by spraying powdered (or a small amount of liquid) absorbent and adsorbent into the flue gas; It is necessary to vigorously develop and utilize clean energy, such as geothermal energy, hydropower, solar energy, wind energy, tidal energy, etc.; reduce the use of motor vehicles as ordinary people; Pay attention to greening.

Hello, factory chimney exhaust sulfur dioxide exceeds the standard, and desulfurization facilities should be used.

The first step in the overall control is to use coal with a relatively low sulfur content.

Secondly, desulfurization equipment is used in exhaust emissions.

Alkaline liquids are usually used for absorption.

In this way, emissions can be avoided from exceeding the standard.

I think so.

It needs to be absorbed and treated before it can be discharged, and it can never be discharged if it exceeds the standard, so it can be done as an absorption device, and then tested after absorbing sodium hydroxide, and it can be discharged only if it is qualified, 2NaOH + SO2 = Na2SO3 + H2O

1.The necessity of controlling SO2 According to GB4915-2013 "Emission Standard for Air Pollutants in the Cement Industry", existing cement enterprises are required to implement new emission standards from July 1, 2015, and the SO2 emission limit is 200mg m3.

2.Mechanism analysis of sulfur in raw materials, one exists in the form of sulfides, in which sulfides are divided into organic sulfides and inorganic sulfides.

3.Internal circulation of sulfur The SO2 decomposed by various sulfides will also be absorbed by CAO and other substances in the decomposition furnace and preheater to form SO2.

4.Production practice 1 In 2010, when the production line was put into operation, the ingredients used by the company were limestone, sandstone, high-alumina ore and sulfuric acid slag.

Go to an environmental protection company like Daqi Environment that specializes in air pollution control.

Hello, according to your question of how to deal with the annual total amount of sulfur dioxide in environmental protection, there is only one answer for you in the library, that is, it is necessary to reduce the content of sulfur dioxide in the air. To solve this problem, we need to start from two aspects: on the one hand, we need to reduce the emission of sulfur dioxide and other sulfides, and on the other hand, we need to plant more trees on the land surface, and rely on greening to purify the atmosphere and reduce the amount of sulfur dioxide in the air.

Let's take a closer look: the use of low-sulfur fuels is one of the effective ways to reduce sulfur dioxide emissions; Desulfurization is used for fuels with high sulfur content; Add desulfurizer to remove sulfur during fuel combustion; Emission flue gas desulfurization, flue gas desulfurization can be roughly divided into categories. One is the wet process:

method of flue gas scrubbing using liquid absorbent; The second type is dry method: sulfur dioxide is removed by spraying powdered (or a small amount of liquid) absorbent and adsorbent into the flue gas; It is necessary to vigorously develop and utilize clean energy, such as geothermal energy, hydropower, solar energy, wind energy, tidal energy, etc.; As an ordinary person, the use of motor vehicles is less than that of the cave; Pay attention to greening.