How to fertilize water to make Chinese cabbage

From the perspective of the whole growth period of Chinese cabbage, it is necessary to pass through three periods of seedling stage, rosette period and baldness period. The absorption of nutrients at the seedling stage of Chinese cabbage is small, accounting for only 10%, and the rosette period accounts for 30%. Production should be controlled during this period. Water-controlled fertilizers, especially nitrogen-controlled fertilizers, allow Chinese cabbage leaves to grow slowly. This is also known as seedling emergence. Do not allow the water to be too full to cause the leaves to grow upright and stand upright. The leaves should be made to look like rosettes. The leaves should be tightly flattened. When the ball is reached, it can be compacted, with high yields and good quality. It can be irrigated early in the rosette period. Both nitrogen and nitrogen application can cause the leaves to grow long, have large leaves, and have problems with their hearts. Partial application of nitrogen fertilizer, phosphorus and potassium nutrients will lead to lack of nutrients is not true; Chinese cabbage control rosette water control period, to lay a good foundation for the heart, premature watering and nitrogen will cause the heart is not true.

Industrial Filter Dedusting Devices

Industrial Filter dusting Devices

Describe:

The dust separation equipment is called dust-removing device. The modern industrial dust removal device can be divided into filter barrel type air dust collector and bag type air dust collector. They are suitable for fine, dry, non-fibrous dust.

Principle and classification:

1. Filter cartridge dust devices:

The filter barrel is used as the filter element. After the dust gas enters the dust collector, due to the sudden expansion of the air section and the effect of the air distribution plate, some coarse particles in the air flow settle in the ash hopper in the action of kinetic energy and inertia force, and the particles are fine. When the dust with low density enters the filter chamber, the dust is deposited on the surface of the Filter Material through the combined effects of Brownian diffusion and interception, and the purified gas enters the clean air chamber and is discharged by the fan through the exhaust pipe.
The installation methods of filter cartridge include oblique insertion type, side mounted type, lifting type, top type, filter tube material can be divided into long fiber polyester filter, composite fiber polyester filter, antistatic fiber filter, flame retardant fiber filter, high temperature resistant fiber filter, etc.

The material can be divided into long fiber polyester filter, composite fiber polyester filter, anti static fiber filter, flame-retardant fiber filter, high temperature resistant fiber filter and so on.

The structure of the filter tube type dust collector is composed of air inlet tube, exhaust tube, box body, ash hopper, ash cleaning device, flow guide device, air distribution plate, filter tube and electric control device.

1. Bag filter dust devices:

Bag filter is a kind of dry filter device. The filter bag is usually made of textile filter cloth or non-textile felt. The filter function of fiber fabric is used to filter the dust containing gas. When the dust gas enters the bag filter, the particles are large. The dust with large specific gravity is deposited by gravity and falls into the ash hopper. When the gas containing smaller dust passes through the filter material, the dust is captured and intercepted, and the gas is purified.

Bag dust collector structure is mainly composed of upper box, middle box, lower box (ash hopper), ash removal system and ash removal mechanism. In addition to the proper selection of bag material, the cleaning system plays a decisive role in bag dust collector. Therefore, the ash removal method is one of the characteristics of the bag dust collector, and also an important part in the operation of the bag filter. Ash cleaning methods include: simple manual ash cleaning, mechanical vibration ash cleaning, reverse air ash cleaning and pulse injection soot cleaning and so on.

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