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Dry slag extractor

key word:Heat exchange element


Product description

Dry slag extractor

 

1. Introduction

1.1. Purpose

Dry slag extractor is the main equipment of slag removal system of coal-fired boiler in thermal power plant. It cools the high-temperature slag produced by the boiler, and continuously transmits it to the subsequent cold slag treatment equipment, and finally transports the slag to the slag bin after crushing

The dry-type slag extractor uses natural air to cool hot slag without water; the hot air after cooling slag returns to the furnace to help combustion, so as to improve the steel efficiency.

1.2. Model meaning

GPZ-**-##

GPZ -- Model

** --- rated output (T / h)

## -------- effective width (mm)

1.3. Structural features

The dry slag extractor is composed of head drive section, tail reversing section, standard transmission section, material receiving section, bending transmission section, supporting platform, hydraulic station system and electrical control system. The mechanical part includes shell, conveyor chain, cleaning chain, conveyor chain driving roller, reversing roller, tensioning device of conveying chain and cleaning chain, driving system of conveying chain, driving system of cleaning chain, middle rolling of conveying chain, intermediate roller of conveying chain, anti deviation device of conveying chain, supporting roller and pressing wheel device of cleaning chain, observation window, inspection door, outrigger, platform and escalator.

1.4. Working principle

Due to the negative pressure in the chamber of pulverized coal boiler, under the action of negative pressure in the furnace of pulverized coal boiler, the white air enters the machine from the outside of the dry-type slag extractor to cool the hot slag with high temperature and large amount of heat into the cold slag that can be directly stored and transported. The hot air generated by the cooling slag directly enters the boiler furnace, which takes the heat away from the furnace back to the furnace, thus reducing the heat loss of the boiler and improving the efficiency of the boiler.

 

2. Main technical parameters

The main technical parameters of dry slag extractor are shown in table 58-1.

Table 58-1 main technical parameters of dry slag extractor

Parameters Model
GPZ-01 GPZ-03 GPZ-05 GPZ-10 GPZ-15 GPZ-20 GPZ-30
Rated capacity of dealing the slag (t/h) 1 3 5 10 15 20 30
Design feeding temperature(℃) 900
Design discharge temperature (℃) 100200
Belt widthmm 650 800 1000 1200 1200 1400 1400
Power of the main conveying motor 1.55.5 2.27.5 3.511 5.515 7.518 1122 1530
KW
Cleaning motor power 1.03.0 1.03.0 1.03.0 1.54 1.54 2.25.5 2.25.5
KW
Maximum lifting angle° 55

 

3. Equipment appearance and structural dimensions

See Fig. 58-1 and table 58-2 for the appearance and structural dimensions of the dry type screening machine

Table 58-2 structural dimensions of dry screening machine

Parameters Model
GPZ-01 GPZ-03 GPZ-05 GPZ-10 GPZ-15 GPZ-20 GPZ-30
A(mm) 1882 2032 2232 2432 2432 2632 2632
B(mm) 1346 1496 1696 1896 1896 2096 2096
H(mm) 2120 2147 2188
a(°) According to the spot conditions (less than 55)

 

4. Selection method

The model of dry-type slag extractor is selected according to the amount of slag discharged from the boiler, the size space of furnace bottom in the boiler room and the way of slag storage and transportation. The electric control system and hydraulic system are determined by the design form of the whole slag removal system.

 

5. Scope of supply and order requirements

5.1. Scope of supply

The whole machine is supplied, including dry slag machine body, platform ladder, local control box and hydraulic system. The local control box and hydraulic system can be selected according to the actual needs of users; the matching portal slag extruder, transition slag bucket, mechanical seal device and other users can choose at will.

5.2. Order requirements

When ordering, indicate the boiler model, coal burning parameters, boiler slag discharge quantity, slag temperature requirements after cooling and maximum air volume of the boiler; at the same time, provide the layout of slag dryer, the follow-up treatment method of slag and electric control requirements.