AH type slurry pump

AH horizontal centrifugal slurry pump. Suitable for metallurgical, mining, coal, power, building materials and other industrial sectors for transporting highly abrasive, high-concentration slurry. This type of pump can also be used in multi-stage series. The pump bodies of M, AH, and HH type pumps have replaceable wear-resistant metal or rubber linings, and the impellers use wear-resistant metal or rubber materials.

Introduction to AH type slurry pump

Pump body, pump cover and flow components: This series of pumps are horizontal, vertical, double-casing slurry pumps. The pump body and pump cover have replaceable metal linings. The lining material is high-chromium wear-resistant alloy material. The lining can be used until it is worn through, extending the maintenance cycle and reducing operating costs. The pump outlet direction can be rotated and installed at 8 angles.

Bearing assembly: The pump's bearing assembly adopts a cylindrical structure, which facilitates adjustment of the clearance between the impeller and the front guard plate, and can be removed as a whole during maintenance. The bearings are lubricated with grease.

Shaft seal (seal): The pump shaft seal types include packing seal, auxiliary impeller seal, and mechanical seal.

Transmission method: There are V-belt drive, elastic coupling drive, gear reducer drive, fluid coupling drive, variable frequency drive device, and thyristor speed regulation, etc. Among them, the V-belt drive has CL, CV, CR, ZL, ZV, and ZR drives.

Overall performance: The pump has a wide performance range, good cavitation performance, and high efficiency. Multi-stage series technology can be used to meet long-distance transportation. The flow components have a variety of metals to choose from, and the depth is increased. Using a variety of speeds and various modified methods allows the pump to operate in industrial and mining environments. It has a long service life, high operating efficiency, and can meet various harsh conveying conditions.

Slurry pump working principle

First, let's talk about the relationship between centrifugal pumps and slurry pumps, and then the principle of slurry pumps will naturally become clear. The centrifugal concept comes from the original pump. There are many types of pumps, and dozens of categories can be divided according to different perspectives. Centrifugal pumps are classified according to the working principle of the pump, which is the process of increasing the pressure of the transported medium through centrifugal force. Other common types include screw principle, plunger principle, etc., which can be divided into pumps different from the centrifugal principle. After talking about the concept of a centrifugal pump, let's talk about a slurry pump. A slurry pump is a classification of pumps from another perspective, that is, from the transported medium. As the name suggests, a slurry pump transports a mixture of solid particles containing slag and water. But in terms of principle, a slurry pump is a type of centrifugal pump. In this way, these two concepts are clarified.

The main working parts of a centrifugal pump are the impeller and the casing. The impeller in the casing is located on the shaft and connected to the prime mover to form an integrated unit. When the prime mover drives the impeller to rotate, the blades in the impeller force the fluid to rotate, that is, the blades do work on the fluid along its direction of motion, thereby forcing the pressure potential energy and kinetic energy of the fluid to increase. At the same time, under the action of inertial force, the fluid flows from the center to the edge of the impeller and flows out of the impeller at a high speed, enters the discharge chamber, and then is discharged through the diffuser. This process is called the water pressure process. At the same time, because the fluid at the center of the impeller flows to the edge, a low-pressure zone is formed at the center of the impeller. When it has sufficient vacuum, under the action of the pressure at the suction end (generally atmospheric pressure), the fluid enters the impeller through the suction chamber. This process is called the water suction process. Due to the continuous rotation of the impeller, the fluid is continuously discharged and sucked in, forming continuous operation.

The working process of a centrifugal pump (including a slurry pump) is actually a process of energy transfer and conversion. It converts the mechanical energy of the high-speed rotation of the electric motor into the pressure energy and kinetic energy of the pumped fluid through the pump blades.

Uses of AH type, M type, and HH type fractional slurry pumps

Slurry pumps are widely used in mining, power, metallurgy, coal, and environmental protection industries to transport slurries containing abrasive solid particles. For example, ore slurry transportation in metallurgical beneficiation plants, hydraulic ash removal in thermal power plants, coal slurry and heavy medium transportation in coal washing plants, dredging rivers and streams, and river cleaning. In the chemical industry, it can also transport some corrosive slurries containing crystals.

First, in the beneficiation plant application, about 80% are used in the mining industry beneficiation plant. Due to the harsh operating conditions of ore pre-selection, the service life of slurry pumps is generally lower in this section. Of course, different ores have different abrasiveness. For example, in sections such as concentrate transportation, the abrasiveness is relatively reduced, and the overall service life of the pump is longer. Therefore, when users often ask suppliers about the service life of their products during the procurement process, strictly speaking, no manufacturer can make an accurate service life cycle commitment to users without any basis, because the service life of flow components (wear-resistant and corrosion-resistant parts) depends on various factors. The diversity and complexity of operating conditions lead to differences in the service life of materials of the same quality. However, in the preliminary selection stage, a powerful manufacturer can design reasonable operating conditions for the user.

Secondly, in the power industry, it is mainly thermal power plants. At present, China's power plants are mainly thermal power generation and hydropower generation. In thermal power plants, due to the use of a large amount of coal-fired power generation, the ash or slag after coal combustion needs to be removed. The slurry pump is used for ash removal, and the slag is transported to the ash slag landfill after mixing with a certain amount of water through the slurry pump, so sometimes the slurry pump in the power plant is also called an ash slag pump.

Furthermore, in the coal washing industry, due to different operating conditions, larger coal lumps and gangue are prone to clogging, and the design requirements for slurry pumps are very high. A coal washing plant under Huaibei Mining Bureau adopted a specially designed slurry pump in 2005, replacing the slurry pumps originally imported from Australia. It has been operating normally and transporting larger coal lumps and gangue without clogging, and its wear life exceeds that of imported pumps.

In the field of seawater sand selection, slurry pumps are gradually gaining customer recognition. However, in seawater sand selection and river dredging, slurry pumps are more often referred to as sand pumps or dredging pumps. Despite the varying names, from a structural and performance perspective, they can all be generally called slurry pumps. Therefore, in seawater sand selection, they are often called sand pumps, while in river dredging, they are usually called dredging pumps.

While slurry pumps have wide applications, correct usage is crucial. The name itself limits understanding for those outside the industry; in fact, mud pumps, sludge pumps, dredging pumps, and desilting pumps all fall under the applications of slurry pumps. During slurry pump application, rational design, accurate calculations, and proper selection are extremely important.

AH Slurry Pump Performance Parameters

AH Type Slurry Pump Structure Diagram

	1. Shaft
	2. Shaft Seal
	3. Support Components
	4. Packing
	5. Packing Box
	6. Impeller
	7. Rear Casing
	8. Discharge Pipe
	9. Casing
	10. Impeller
	11. Liner
	12. Front Casing
	13. Pump Cover
	14. Suction Port
	15. Sleeve

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