CN2280113Y - Corrosion-proof rotary spherical digester - Google Patents

Abstract

The utility model discloses a corrosion-proof rotary spherical digester used in paper pulping industry. The outside of the carbon steel layer of a sphere is covered with a heat insulation layer; the inside of the carbon steel layer of the sphere is provided with a composite stainless steel layer which is formed by exploding with the sphere. The utility model has the advantages ofabrasion resistance, pressure resistance, and corrosion resistance.

Description

Corrosion-proof rotary spherical digester

The utility model belongs to a kind of paper-making pulping equipment.

At present, used rotary spherical digester in the paper industry, form by ordinary carbon steel machine-shaping, in the digestion process, owing to containing silt and crushed stone in timber, forage, the bamboo chip, to the spheroid serious wear, and the main chemicalss such as chemical adjuvant such as ammonium sulfite of using produce chemical attack to the carbon steel balls housing in the pulping process, and rotary spherical digester operating pressure (0.8MPa) and operating temperature (178 ℃) are higher in addition, when seriously denuding, can produce blast, this has become a big hidden danger of paper industry.

The purpose of this utility model provides a kind of anti-corrosion rotary spherical digester, makes it low wearing and tearing and corrosion of driving the interior material of rotary spherical digester to the ball inner surface, increases the service life, and reduces maintenance cost, guarantees safety in production.

For achieving the above object, the technical solution of the utility model is: rotary spherical digester is made up of spheroid and corresponding auxiliary equipment, and the carbon steel shell outside of spheroid is covered with the insulation layer, and the carbon steel shell is built-in with the compound stainless steel layer of explosive forming with it.

Adopt the rotary spherical digester of above-mentioned composite construction, because internal layer is a corrosion resistant plate, has unexpected variation wear-resisting, anticorrosive and energy bearing temperature and pressure, it is that receipts are close that stainless steel and carbon steel expand, thermal (temperature difference) stress is little, by the composite construction of explosive forming, layering and leakage can not take place, prolong rotary spherical digester service life and reduced maintenance cost, guaranteed safety in production.

The accompanying drawing drawing is described as follows:

Fig. 1 is the cutaway view of rotary spherical digester.

Fig. 2 is the enlarged drawing of K portion.

Following structure accompanying drawing and embodiment are done a step and are described in detail.

See that from Fig. 1, Fig. 2 the rotary spherical digester spheroid comprises charging aperture 1, air inlet 2, air inlet pipe 3, discharging opening 4, blow-off pipe 5, spherical shell is by insulation layer 6, carbon steel layer 7 and compound with it stainless steel layer 8.The rotary spherical digester spherical shell adds man-hour, earlier carbon steel sheet is become composite board with corrosion resistant plate through explosive forming, and shaped, adopts Welding Structure to be spliced into spherical shell, and the outside is coated heat preserving and insulating material again.

Claims (1)

1, Corrosion-proof rotary spherical digester, carbon steel shell (7) outside of spheroid is covered with insulation layer (6), it is characterized in that the carbon steel shell is built-in with compound stainless steel layer (8).

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