Printing And Dyeing Industry: Natural Gas Is The Best Choice.

The problem of heating mode of coal-fired heat pfer oil has attracted people's attention: < p > the thermal efficiency of coal-fired heat pfer oil furnace is relatively low; the heat pfer mode of heating oil still has two times of heat exchange; the pollution caused by coal combustion is serious; the site needs to be large and the environment is poor; there are many more applications; and the power load of the heat pfer oil furnace is quite large.

In particular, the high pollution of coal to the environment makes the heating method restricted by many local governments, so alternative energy sources are needed.

There are many alternatives to coal substitution, of which the highest cost of oil is avoided.

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< p > consideration of coal water slurry (/p >).

< p > coal water slurry is a kind of plan that can be considered. In some places, coal water slurry has been used instead of coal. Coal water slurry (CWM) is a kind of fuel which can be evenly and steadily flowing under the action of chemical additives (0.2~1%), which is mainly composed of coal (60~68%) and water (40~32%) as auxiliary material, grinding and refining by special equipment and process.

Compared with the traditional solid fuel coal and fuel, CWS has the advantage that it can pmit fuel and spray combustion like fuel, and can replace fuel.

Burning in industrial boilers, industrial furnaces and utility boilers, the burnout rate increased from 70~80% of solid coal combustion to more than 98%.

The carbon content in slag is reduced from 13.7% of coal to 2% of coal water slurry, which directly reflects the characteristics of environmental protection and energy saving.

The overall economic cost is much lower than that of fuel.

Bring social environmental benefits and enterprise economic benefits.

Coal water slurry is similar to fuel oil, and pportation and storage of storage tanks reduce the pollution and storage area of solid coal pportation process.

It not only reduces the total area of the boiler house, but also improves the surrounding environment.

There is almost no danger in storage and operation.

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< p > the production of coal water slurry requires special equipment. The application of coal water slurry is different from that of coal-fired boilers. The exhaust gas discharged from coal water slurry is still serious. There are still 2 heat exchanges. In general, it is not as good as < a href= "http://www.91se91.com/news/" > Natural Gas energy conservation and environmental protection < /a >.

For places where there is no natural gas, coal water slurry instead of coal is an option that can be considered, of course, subject to the consent of the local government.

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< p > the selection of biomass energy < /p >

< p > it should be said that biomass is one of the energy sources popularized by the state, and some individual experts recommend it to be used in printing and dyeing enterprises. In some places, the acceptance of the project that the natural quality can replace coal is indeed completed. However, after careful investigation, there are great problems in its real application, and some factories are coping with the inspection of higher authorities and the restriction of the government.

They are still burning coal, and they burn natural materials when they inspect and visit.

As is known to all, taking a medium-sized printing and dyeing enterprise as an example, the average daily coal required for the 10 heat setting machines should be about 35 tons.

If biomass energy is used, its biomass fuel needs at least 48 tons per day. Biomass fuel has a small proportion and large volume. There are many problems in its source and usage, so there is a lack of practical feasibility.

In addition, there are more exhaust gases in the combustion process. Of course, in the long run, biomass energy can be applied and the use cost is low after solving the problem of the source and pportation of biomass fuel.

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< p > consideration of steam heat source < /p >

More than 20 years ago, a large number of enterprises had introduced such stereotyping machines. Some of the city's printing and dyeing enterprises had installed and reconstructed steam setting machines, but in the end, they could not be used for a long time. At that time, the main reason was the pressure and temperature of the steam supplied. Nowadays, the steam heating machine is very rare in the industry.

As for some printing and dyeing enterprises with thermal power plants, the use of steam as a heat source for molding machines does exist, but this is a special case. The general enterprises have no application conditions, and the number of setting machines is also limited.

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< p > last year, a number of units in China jointly carried out a detailed test of the 2.5~2.8MPa medium pressure steam supplied by the thermal power plant for heat setting. Although it could meet the requirements of heat setting, due to various reasons such as the cost of energy and the supply of medium pressure steam, the test unit installed < a href= "http://www.91se91.com/news/index_c.asp" > machine < /a > without normal application.

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< p > natural gas instead of coal is the best choice < /p >

< p > natural gas is an important part of the world's energy. It is also called the three pillar energy with coal and petroleum. It is high quality fuel and < a href= "http://www.91se91.com" > chemical raw material < /a >.

Natural gas is a clean energy. No waste residue and waste water after combustion, compared with coal, it can reduce sulfur dioxide emissions by nearly 100%, reduce carbon dioxide emissions by 60%, and nitrogen oxides emissions by 50%.

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< p > the establishment of natural gas as heat source in foreign developed countries is quite common, and the R & D and available equipment in this area are quite mature.

The establishment of natural gas as heat source in Jiangsu is quite common in Changzhou, Jiangsu. There are many manufacturers responsible for the pformation of the equipment. There are also many manufacturers in Jiangsu, Shanghai and even Shaoxing.

The application of natural gas in recent years has proved that natural gas instead of coal is the best choice. It has the effect of saving energy and reducing consumption, and accords with the requirements of environmental protection development both at home and abroad.

Of course, the choice of natural gas must be selected only if the source of gas is guaranteed.

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< p > advantages and disadvantages of natural gas replacing coal < /p >

< p > advantages: natural gas is a clean energy source, which can significantly reduce the discharge of three wastes, improve energy efficiency and reduce energy consumption; use natural gas without coal yard, no cinder, no dust, clean and clean plant area, and greatly improved production environment; because of the fast cooling up, the temperature can be generally raised about 15min, and the temperature control accuracy is high, and the accuracy is 1 degrees. Therefore, the production efficiency is improved, the setting speed can be increased by 5~10%, the product quality is stable, and the shaping repair is reduced.

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< p > disadvantages: the cost may increase.

When many units adopt natural gas, the cost of natural gas per day is compared with the cost of coal per day, and the cost is obviously increased. Generally speaking, the cost of natural gas will be higher than that of coal and the cost may increase as compared with the cost of gas and coal alone.

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< p > the first thing to consider when using natural gas is whether the local gas supply is adequate or not. In some places, natural gas supply is no problem at ordinary times. When the new year or gas source is tight, natural gas can not be guaranteed. This will bring serious impact to printing and dyeing enterprises.

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