The Coolers & Insulated Bags is an indispensable device in the production of pellets or puffed materials. Most of the previous use of vertical Coolers & Insulated Bags, is now counter-current or flap-type, horizontal crawler type replaced.
The main feature of the countercurrent Coolers & Insulated Bags is that the discharge direction is opposite to the direction of the cooling wind and is called countercurrent. The advantage of the countercurrent Coolers & Insulated Bags is that the temperature at which the granulator is discharged and the higher water particles are top-down at the top of the Coolers & Insulated Bags, and the cold air enters from the lower end of the Coolers & Insulated Bags, Of the movement, the temperature is getting higher and higher, and thus play a slow cooling of the pellet hot material, this cooling method can achieve the material moisture in the temperature is reduced when the full discharge, but also to avoid the rapid cooling of the surface caused by particles Cracking phenomenon. In addition, because it covers an area of small, simple structure was fed by the general access.
The most critical performance of the Coolers & Insulated Bags is the cooling effect. And the cooling effect is mainly taken from its structure. Construction of Countercurrent Coolers & Insulated Bags
Countercurrent Coolers & Insulated Bags mainly by the hopper, hopper, discharge fence and other components. The key component is the discharge fence. Discharge fence is driven by the eccentric wheel for reciprocating movement to achieve the nesting, and the discharge of the fence from the upper and lower level device to control. The stop position is achieved by the stop level. From this point of view of the countercurrent Coolers & Insulated Bags control, is entirely achieved by the material level.
Coolers & Insulated Bags inlet and outlet side of the crack is a brittle cracking, the general performance of the tooth plate tip crack, and then along the intergranular cracking. The Coolers & Insulated Bags inlet and outlet side cracking has a serious impact on the work, not only will reduce the efficiency, but also cause irreversible damage to the equipment. Today, the most cold bacteria finishing some of the content, teach you how to prevent the Coolers & Insulated Bags inlet and outlet side of the problem. ,
First of all, we must first understand the reasons for the opening and closing of the Coolers & Insulated Bags inlet and outlet: the mouth of the Coolers & Insulated Bags inlet and outlet of the tooth plate weld cracks because the outlet end of the weld to withstand the larger welding residual stress and thermal stress, by the medium of high quality fraction of chloride ions and high temperature Role, the occurrence of chloride stress corrosion cracking. When the Coolers & Insulated Bags inlet and outlet side of the cracking problem, you should first disconnect the compression plate, and then in the insulation ladder to add the upper expansion joint, so that the plate and the compression plate between the expansion difference between the absorption. In order to greatly reduce the expansion of the width of the direction of the plate constraints, the first ablation of the tube plate structure, in the upper part of the beam with the lower part of the same roof cover.
How to prevent the Coolers & Insulated Bags inlet and outlet side cracking problem? First of all, to improve the carrying capacity of the Coolers & Insulated Bags, the comb plate can be updated into insert structure, 60mm length and the thickness of the plate is consistent with the welding, the end only play a sealing effect. The tubesheet is held by the device flange and can withstand board beam quality. Install the support beam at the end of the beam. In order to improve the heat transfer effect, the crack at the end of the beam shell into the exit channel length reduced. In order to facilitate inspection of the upper part of the beam bundle expansion joints, can be installed in the upper part of the Coolers & Insulated Bags into the hole. If you want to remove the tube bundle, you can first disconnect the lower part of the upper expansion, and then removable the upper shell and expansion joints.