Why should molecular sieves be set up with traps and what is the function?

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The role of the trap is to block the drainage.

Molecular sieve is a synthetic hydrated aluminosilicate (bubble zeolite) or natural zeolite with the function of screening molecules. It mainly serves as an organic chemical and petrochemical industry, and is also an excellent adsorbent for gas dehydration to purify pollutants in the air.

According to different pore sizes, molecular sieves have the following types: 3A (potassium A type A (sodium A type A (calcium A type Z (calcium Z type Z (sodium Z type), Y (sodium Y type), sodium mercerized zeolite type, etc. The most basic structure of the zeolite skeleton is SiO4 and ALO4 tetrahedral, and the crystallization of the three-dimensional network structure is composed of ordinary oxygen atoms.

This form of bonding constitutes voids and channels with molecular level and uniform pore size.

Molecular sieves have high adsorption capacity, strong selectivity and high temperature resistance. It is widely used in organic chemical industry and petrochemical industry, and is also an excellent adsorbent for gas dehydration. It has also received increasing attention to exhaust gas purification.

Molecular sieve is a kind of aluminosilicate compound with a cubic lattice, which is mainly composed of silicon and aluminum connected by an oxygen bridge to form an open skeleton structure, in which there are many pores with uniform pore size and holes arranged neatly arranged and large internal surface area. In addition, it also contains metal ions and water in a chemical state with a low electric price and a large ionic radius. Because the water molecules are continuously lost after heating, but the crystal skeleton structure remains unchanged, many cavities of the same size are formed, and the cavities are connected with many micropores of the same diameter, and the diameter of these tiny pores is uniform, which can adsorb molecules smaller than the diameter of the pores into the inside of the pores, and exclude molecules larger than the pores, so that molecules with different shapes and diameters, molecules with different degrees of polarity, molecules with different boiling points, and molecules with different degrees of saturation can be separated, that is, they have "sieving" The role of molecules, so it is called molecular sieve.

At present, molecular sieves are widely used in chemical, electronic, petrochemical, natural gas and other industries.

Molecular sieve models commonly used in the gas industry;

Type A: Potassium A (3A), Sodium A (4A), Calcium A (5A), Type X: Calcium X (10X), Sodium X (13X).

Type Y: , sodium Y, calcium Y

Molecular sieves have strong moisture absorption capacity and are used for gas purification and should be stored to avoid direct exposure to air. Molecular sieves that have been stored for a long time and have absorbed moisture should be regenerated before use. Molecular sieves avoid oil and liquid water.

When using, try to avoid contact with oil and liquid water. The gases that are dried in industrial production are, air, hydrogen, oxygen, nitrogen, argon, etc. Two adsorption dryers are connected in parallel, one works while the other can be regenerated.

Alternate work and regeneration with each other to ensure continuous operation of the equipment. The dryer works at room temperature and is regenerated by flushing at a temperature of up to 350 °C.

Bypass valves for steam traps.

When the trap is installed in a standardized manner, a bypass should generally be set, and the bypass valve is closed when the trap is working normally. When to use bypass? 1.

When the amount of condensate in the equipment increases sharply, the trap cannot be discharged in time for a while, including the initial stage of the heating equipment list, the condensate volume is several times greater than the average amount, and the trap cannot completely remove the condensate at once, so it relies on bypass help. 2.When the trap fails and cannot drain normally and affects production, it can be compensated by bypass.

Even temporarily replace the trap with a bypass, and quickly troubleshoot the trap or replace the faulty trap.

Of course, the bypass valve can generally work without installing the standard setting, but once there is a problem, it will feel inconvenient.

1. The function of the trap is to prevent steam drainage, that is, to prevent steam loss and discharge the condensate generated;

2. Why install the bypass valve; The bypass valve is installed to prevent the trap from working properly at times, and to open the bypass valve to drain the water to reach the temperature required for the production of the equipment; Another function is to remove impurities in the steam or pipes to prevent the trap from clogging.

The function of the steam trap is to be used in the steam heating equipment and steam pipes, which can automatically remove condensate and air from the steam using equipment and steam pipes, and can prevent steam leakage. So why install a bypass valve when installing a trap? Opinions differ.

Please refer to the details for detailsTrapsWhether a bypass valve needs to be installed.

Some technicians in the UK do not think that installation is required. Their reasons are:

1. The standby coefficient has been considered when selecting the trap, which can solve the discharge problem of a large amount of condensate when the steam-using equipment is started cold;

2. The installation of bypass valve not only increases investment, but sometimes makes the steam trap unable to function due to leakage of the bypass valve;

3. It is possible to give the operator an intentional or unintentional (the valve is opened and forgotten to close)."Running operation"(i.e. the bypass valve is opened and not closed) opportunity;

4. As for the installation of bypass valves, some people think that it is easy to overhaul, they think that as long as one valve is installed in front and behind. After removing the trap, the front valve of the steam trap can be used to drain the water, and it only takes 5-10 minutes to disassemble and replace, so that the short time will not affect the drainage of the steam-using equipment.

Some Japanese technicians believe that steam traps must be equipped with bypass valves in their piping. Their reasons are:

1. A large amount of condensate and air can be quickly discharged by opening the bypass valve when the cold car of the steam-using equipment is started, which can improve the operation efficiency of the steam-using equipment and prevent the failure caused by "air blockage";

2. In the event of a failure, the condensate can be discharged through the bypass valve;

3. Due to the bypass valve, the standby coefficient of the steam trap can be taken as a smaller value, or the standby coefficient is not considered. This allows for the use of small capacity traps, reducing investment;

4. It is easy to overhaul, and the disadvantage is that the bypass valve needs to increase investment and installation space.

As for the failure of the steam trap to perform its proper function after the leakage of the bypass valve and the opportunity to give the operator the opportunity to "run the steam operation", they believe that this is a problem of the operator's energy-saving ideology and factory management, and the installation of the bypass valve should not be hindered by the weak energy-saving ideology and lax factory management.

Based on years of observation of the steam trap piping system and understanding from the plant's energy-saving personnel, our engineers are generally willing to install bypass valves. After educating the operator about the functions of the trap and the bypass valve and strengthening the awareness of energy saving, there was no problem due to the installation of the bypass valve"Running operation"and other undesirable situations. Therefore, it is also preferred to install bypass valves on the steam trap piping system.

However, it is required to be more managed.

Natural or synthetic chemicals with a reticulated structure.

Molecular sieve is a crystalline silicate or aluminosilicate, which is connected by silicon-oxygen tetrahedra or aluminum-oxygen tetrahedron through oxygen bridge bonds to form a pores and cavities with molecular size, which has the characteristics of sieving molecules.

A molecular sieve is a silicaluminate compound with a cubic lattice.

Hello, our company is a manufacturer specializing in the production of molecular sieves Wang Chong.

The normal working life of molecular sieve is more than three years old, depending on the situation and regeneration conditions, and it is generally replaced once in one to one and a half years.

The air is sucked through a compressor and then passed through a molecular sieve column. Collect the oxygen and remove the rest, like nitrogen. It's simple and easy to operate. Press the switch and you're ready to go. If you can't find a place to sell it, you can come to me.

Through the compressor, (PSA) pressure swing adsorption air, the air is pumped into the molecular sieve, the molecular sieve adsorbs the nitrogen, carbon dioxide and other exhaust gases in the air, only the oxygen enters the gas collection cylinder, and the high-pressure purification is carried out through the high-pressure valve, and the concentration of the oxygen generator is raised to the standard and then the oxygen is released, which is basically this principle!

The molecular sieve oxygen generator adopts the world's advanced pressure swing adsorption (PSA) principle, using air as raw material, without any additives, turning on the power at room temperature, adsorbing nitrogen and other gases through the molecular sieve, and separating medical oxygen with a purity of more than 90% from the air.

The machine adopts the world's advanced pressure swing adsorption principle, at room temperature, the outside air is pressurized by the compressor, and the nitrogen and oxygen in the air are separated through physical adsorption and desorption operations, and all kinds of harmful substances contained in the air are removed at the same time. When the power is turned on, highly concentrated, dust-free, sterile medical oxygen can be continuously separated from the air in an instantaneous manner.

Conventional traps do not have a check function. If you need it, tell the manufacturer in advance that some traps can add a check device to the interior.

The structure of individual thermostatic traps can be checked

No. First, the thermostatic trap is switched on and off by the temperature control, and the backflow temperature will only be lower, so that the valve will open larger;

Second, the valve structure determines that the reverse direction is not tightly closed, even if the reflux temperature is high enough, it is not tightly closed.

By adsorbing moisture in the air, the moisture in the air is reduced and the humidity decreases when the moist air passes through the container equipped with a molecular sieve.