Desulfurization Pump

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STL series desulfurization pump

STL series desulfurization pump is divided into horizontal (STL) and vertical (STLL) two kinds of structure. For axial suction, single stage, single suction, cantilever centrifugal structure. This series of pumps in the hydraulic design, mechanism design and casting materials used, the comprehensive application of the advantages of similar products at home and abroad and to be innovative. It has the characteristics of high efficiency and energy saving, anti-corrosion and anti-wear, low vibration, low noise, reliable operation, long service life, and convenient maintenance. The comprehensive performance of the pump is at the domestic advanced level.

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Product Introduction

Horizontal, vertical (liquid) series of desulfurization pump in the hydraulic design, structural design and the use of wear-resistant materials, the comprehensive application of the advantages of similar products at home and abroad and to be innovative

Desulfurization pump has the characteristics of high efficiency and energy saving, low vibration, low noise, reliable operation, long service life, and convenient maintenance. The comprehensive performance of the pump is at the leading level in China, and the efficiency index of most pumps is at the international advanced level.

It can be widely used in electric power, metallurgy, coal, building materials and other industries to transport slurry containing solid particles. Such as thermal power plant desulfurization, hydraulic ash removal, metallurgical ore dressing plant slurry transportation, coal washing plant coal slurry and heavy medium transportation.

The maximum slurry weight concentration Cw allowed to be transported is: ash (slag) slurry and coal slurry 45%; Mineral slurry and heavy medium 60%.

Working conditions

Inlet and outlet diameter	25-900mm
Flow range	600-25000m³/h
Lug range	20-150
Speed	720,990,1480 and 2960r/min
Power	300-5000KW
Structural Design	The pump is axial suction, single stage, single suction, cantilever centrifugal structure.
Application areas	Widely used in thermal power plants, aluminum smelting plants and oil refineries and other industries desulfurization system conveying limestone or gypsum slurry
Medium	Conveying corrosive media containing fine particles
Material classification	high chromium alloy

Model meaning

Product Features

This series of desulfurization pump is divided into two categories, one is horizontal, for the axial suction single-stage single suction centrifugal desulfurization pump, another is vertical, single-stage single-suction centrifugal desulfurization pump for vertical axial suction.

1.Structural features and models of horizontal desulfurization pumps

(1)Structural characteristics of horizontal desulfurization pump

Pump head section

The pump head portion includes a pump casing, an impeller, and a shaft seal device. The pump head is bolted to the bracket. According to the need, the position of the outlet of the pump can be 45° Interval rotation is used for eight different angle mounting.

The pump shell of this series of desulfurization pump has both double-layer shell structure and single-layer shell structure. The outer layer of the double-layer structure is the metal pump shell (Front pump casing, rear pump casing),The material is usually HT200 or QT500-7. The inner shell can be made of wear-resistant and corrosion-resistant high-chromium alloy cast iron.(Including volute, front guard and rear guard), or made of rubber (Including front volute and rear volute).

The impeller is composed of front cover plate, rear cover plate, blade and back blade. The blades are twisted blades and usually have 3-6 pieces. The back blades are distributed on the outside of the front and rear cover plates, usually 8 pieces. The material of the impeller is high chromium alloy cast iron, and the impeller and the shaft are threaded connection.

Shaft seal device with auxiliary impeller+Packing combination seal, packing seal, mechanical seal three types.

Vice impeller+Packing combination sealing type consists of stuffing box, auxiliary impeller, water seal ring, packing, packing gland and shaft sleeve.
Packing seal type consists of stuffing box, spacer sleeve, water seal ring, packing, packing gland and shaft sleeve. The mechanical seal type consists of a sealing box, a spacer sleeve and a mechanical seal.

Bracket section

The bracket part has two structures: horizontal middle opening type and cylinder type.

Open bracket with thin oil lubrication and grease lubrication of two types. The thin oil lubrication bracket is mainly composed of bracket body, bracket cover, shaft, bearing box, bearing, bearing gland, stop sleeve, nut, oil seal, water retaining plate, disassembly ring and other parts. The larger diameter pump also has a water cooling device. The cylindrical brackets are lubricated with grease and are mainly composed of bracket body, bearing body, shaft, bearing, bearing top sleeve, bearing gland, oil seal, oil cup, water retaining plate, and other parts.

2. Vertical (liquid) desulfurization pump structure features and models

(1) Structural features

Vertical desulfurization pump is mainly composed of impeller, volute, rear guard plate, shaft sleeve, bracket, support plate, shaft, bearing, bearing body and other parts. The material of the impeller, volute and rear guard plate is high chromium alloy cast iron. The impeller and the shaft are connected by threads, and the volute, bracket and bearing body are connected by bolts. The pump shaft and motor can be driven by coupling direct connection or belt drive. The bearings are lubricated with grease.

(2) No shaft seal, hanging wall type vertical (liquid) desulfurization pump structure diagram