I. Overview
DGS series single-roll slag crusher (hereinafter referred to as GDS-830) is an update product of the original GDS-40 single-roll slag crusher (hereinafter referred to as GDS-40) and CE-830 single-roll slag crusher (referring to CE Company 30 "×33" single-roll slag crusher technology). Its technical parameters are shown in Table 1, and its technical progress compared with GDS-40 and CE-830 is shown in Table 2.

Table 1 Technical specifications of GDS-830

Table 2 Technological progress of GDS-830 over GDS-40 and CE-830

In order to meet various needs of power plant, GDS-830 tooth roller structure has three kinds: A, B and C; The shaft seal structure between the roller and the end wall of the housing is also divided into three types: "half hole maze" type, "multi-groove maze" type and "water barrier packing" type. Its body structure and Q, V, Y three. It is described as follows:
A type tooth roller, the roller surface is all arranged with the roller tooth plate, the granularity is finer after crushing, suitable for the occasion of high granularity requirements.
Type B gear roller in the structure of the universal CE-X gear plate, is the most widely used model. Roller tooth plate wear failure, can be easily replaced with a new tooth plate.
C-shaped tooth roller structure. Suitable for sea water slag removal or strong coking slag. The involute tooth ring is installed on the drum roller shaft, and only six bolts and nuts are added at one end. When the roller tooth ring is replaced, the bolts and nuts are also replaced, so as to adapt to seawater corrosion. The crushing force of type C tooth roller is stronger than that of type A and type B, which is conducive to slag crushing under the condition of strong coking.
Jaw plate design hook shape, embedded in the adjustable jaw body, no bolt fastening, easy to replace, economic operation.
"Half hole labyrinth" type shaft seal (Code H) structure, suitable for continuous slag discharge operation.
"Multi-groove labyrinth" type shaft seal (code M) structure, suitable for the inlet and outlet or only the inlet and the air isolation closed or semi-closed slag operation.
"Water barrier packing" type shaft seal (code W) structure, only located in the underground mortar pump room slag crusher used.
The use of "water packer" seals when unnecessary is not beneficial but harmful - increasing unnecessary water consumption, journal corrosion and daily maintenance.
The "half-hole Labyrinth" and "multi-slot Labyrinth" type seal uses no water, no packing (corrosive journal), and does not require routine maintenance, and is very popular with power plants.
Q type body structure, suitable for inlet and outlet without flange connection under the furnace continuous slag discharge.
V-type body structure, suitable for flange connection and outlet without flange connection under the furnace slag.
Y type body structure, suitable for inlet and outlet flange connection under the closed furnace or mortar pump room slag.
The upper and lower interfaces matched with the V-shaped body are convenient for welding of the same upper and lower inlet and outlet pipes. The upper flange surface is tilted 10° horizontally to facilitate the loading and withdrawal of slag crusher. The large hand hole on the side is used to replace the roller tooth plate and jaw plate and to remove the metal and other foreign bodies stuck in the slag crusher.
Gds-830 has a high crushing force and can break materials with similar strength to limestone (CaCO3). The slag output varies according to the condition of ash slag: when the ash water is mixed through the slag crusher (such as "regular ash bucket slag discharge") or supplemented by water to wash the slag crusher jaw plate, its output can reach 60t/h (dry base), ash dehydrated through the slag crusher and no water to wash the jaw plate, its output can reach 20t/h (dry base); When the diameter of a large number of ash blocks is greater than 200mm, the output will be reduced.
The GDS-830 drive mechanism consists of a planetary cycloid reducer, a hydraulic coupling and an ordinary asynchronous AC motor. With electrical "automatic control of the barrier" and electrical + hydraulic double overload protection function, safe and reliable. The automatic control and protection process is: if the slag crusher overload card is dead, the electric automatic slag crusher alternately positive and negative rotation to eliminate the stuck resistance, if the positive and negative rotation three times still can not eliminate the stuck resistance, the motor will automatically stop and issue an alarm; Once the electrical failure, the hydraulic coupling can avoid the motor "stuffy" and burned - the motor drives the input end of the coupling to rotate continuously (the output end is blocked) and the coupling is heated up rapidly until the oil plug melts (125℃) and the oil is discharged.
There are two transmission modes from the driving mechanism to the slag crusher: coupling shaft drive and chain drive to meet the choice of different applicable environments. Coupling shaft drive should be preferred. The chain drive increases the radial load of bearings and reduces the life of bearings. The chain and sprocket need to be lubricated and sealed, and the anchor bolt must be fixed and the chain tensioning adjustment mechanism. Chain drive is considered only when the environment is watery or the space size does not allow coupling shaft drive. In order to shorten the total length of the coupling shaft drive, the coupling shaft drive type of the belt drive coupling is also provided for use when necessary.
Both shaft drive and chain drive have left drive and right drive. The driving mechanism at the left end of the slag crusher (facing the slag crusher nameplate) is the left drive, and the driving mechanism at the right end of the slag crusher is called the right drive.
Ii. Installation
1. Mounting of coupling shaft drive
It is placed flat on the upper mouth of the ash ditch or the base platform without anchor bolts. When discharging slag continuously, a diversion flange is superimposed on the inlet of slag crusher of Q type body to prevent the gray water leakage. The slagging port is inserted into the diversion flange, and the gap between the lower edge of the slagging port and the diversion flange is not less than 30mm (to facilitate the slagging machine loading or withdrawal) and the sealing is filled with asbestos rope. When the slag is discharged regularly and the slag is flushed by the ash ditch, the interface of the slag crushing machine of the V-shaped body is welded with the slag discharging port of the large ash hopper. When the outlet of the slag crusher is connected with the jet pump on a regular basis, the lower interface of the slag crusher of the Y-type body is welded with the pipe leading to the jet pump.
2. Installation of chain drive
The difference between chain drive installation and coupling shaft drive installation is:
(1) The driving mechanism can be placed in a variety of positions and different elevations around the slag crusher, so the length of the chain needs to be determined accordingly, and the chain cover for sealing and lubrication needs to be prepared by the user on site.
(2) The slag crusher and the driving mechanism shall be fixed with anchor bolts.
3. Electrical installation
The electric control box can be hung on the wall or column near the slag crusher. The electric control button is on the front of the electric control box. If it is necessary to operate in different places, it can be realized by connecting another button group. For this purpose, wiring terminals are left for the electric control box. The type of alarm (sound or light), quantity and layout shall be taken care of by the user. A pair of wiring terminals (~220V, 1A) are also reserved for the electric control box. For details about the installation cable, see the installation instruction manual delivered with the cable.