Advantages of grille anti-wear technology compared with metal spray and other methods used befor

For a long time, the problem of water wall wear has been troubling the users of circulating vulcanized bed boilers. In order to solve the problem of wear and ensure the long-term stable operation of the boiler, various experts and users have been racking their brains for many years.

Here we briefly introduce and explain why grille anti-wear technology can eradicate wear problems. In addition to the boiler control end to do parameter down, spend a high amount of money every year to change the tube regularly, as well as the replacement of low ash coal and other negative means, here focuses on the introduction of anti-wear transformation and protection measures.

Before the grille anti-wear technology of our company was put on the market, the mainstream anti-wear transformation methods mainly include:

1. Metal spraying;

2. Pouring material covering;

3. Metal cladding;

4. Anti-wear beam;

5. Anti-wear beam with spraying;

6. Anti-wear tile, etc

Among them,

Metal spraying construction time is long, but anti-wear aging is generally not more than a year, coupled with the current low-price construction procurement model, leading to metal spraying quality difference, manufacturers suffer from its users.

There are even some improper spraying operation, but lead to the spray interface and other areas raised obviously cause local eddy instead of aggravating the local violent wear.Castable cover has a long history, good anti-wear effect, but castable cover is equivalent to the direct sacrifice of the heating surface of the boiler, resulting in the decline of boiler energy efficiency, general users do not adopt.

Metal cladding anti-wear effect is good, but the construction time is too long, it takes 2 or 3 months to move, according to the specific situation of the boiler or longer. And the construction environment requirements are very high, many manufacturers of boilers do not have cladding construction conditions, selection is not much.

Anti-wear beam is a relatively new anti-wear means in recent years, but the anti-wear effect is too simple and crude, almost since the use of the root have been found to have moustache and other wear phenomenon, can not eradicate wear.Anti-wear tiles need to be customized according to the diameter of the boiler tube wall anti-wear tiles construction time is long, and affect heat transfer, in addition, for the water wall deformation in the furnace region is not ready for construction, the application is not widely.

Anti-wear beam and spray is almost all the previous manufacturers of anti-wear helpless choice, almost every year need to repeat the construction of a metal spray. Compared with the first time, the effect of metal spraying repeated construction is not as good as the first time, and the construction time is longer.

Many of the above anti-wear methods are basically passive thickening anti-wear concept, they are not to solve the wear but only to help resist wear.Here we mainly introduce our grille anti-wear concept:At the beginning of the research and design of grille anti-wear technology, the direction of eliminating wear should be taken into account.

According to our research, the main factors that lead to wear are too high terminal velocity of the charge on the surface of the water wall, too high local concentration, or increased wear caused by eddy current caused by local protrusion on the surface of the water wall.

The grille anti-wear technology developed by our company forms anti-wear grid by welding anti-wear grille plates along the fins of the water wall horizontally and vertically to stabilize the gas-solid two-phase flow on the surface of the water wall, eliminate local eddy current and reduce the terminal velocity of materials impacting the water wall. The density and construction position of the grid plate are designed scientifically according to the technical situation of the boiler, so the wear problem of the boiler can be completely solved.

Grille anti-wear construction time is short, 400t/h boiler full furnace construction only 7 days. A construction, at least five years can ensure that the construction area without wear and leakage problems.