Are there any domestically produced water-coal slurry pumps available now?

Shanghai Dalong produces high and low pressure coal slurry pumps; the pressure in our plant’s gasification furnace is 4.0 Mpa, and no problems have occurred so far； There is also a Shenyang Metallurgical Machinery Factory that produces high and low pressure slurry pumps; however, the actual performance of these pumps is not well known! :)

Thank you, I hope you can be more specific.

Low-pressure water-coal slurry pump – MY series centrifugal water-coal slurry pump by Shanghai No.1 Water Pump Factory Co., Ltd. Overview: Due to the special nature of the applications for water-coal slurry pumps, high demands are placed on the product’s service life, operational reliability, and ease of maintenance. Leveraging decades of technical expertise and experience in mining pumps, Shanghai No.1 Water Pump Factory Co., Ltd. conducted thorough research on coal gasification processes and the characteristics of water-coal slurry, and successfully developed the MY series of centrifugal water-coal slurry pumps on its own – a product that filled a gap both domestically and internationally. Through years of research, exploration, and continuous improvement, the MY-type centrifugal slurry pump system overcomes some of the inherent drawbacks of diaphragm pumps when used in coal gasification processes. These drawbacks include high investment costs, complex control systems, prone damage to the diaphragms, short lifespan of control valves, high maintenance costs, a narrow range of flow and pressure regulation, and large space requirements. Through expert evaluation and verification by actual user application, centrifugal water-coal slurry pumps can replace diaphragm pumps and be widely used in the field of water-coal slurry in coal gasification systems. The MY-type water-coal slurry pump is being used increasingly reliably in applications such as low-pressure slurry pumps on water-coal slurry production lines. Its advantages of safety, cost-effectiveness, and long service life will make the centrifugal water-coal slurry pump the preferred equipment for the production and transportation of water-coal slurry. The system consists of six components: the MY-type centrifugal coal slurry pump, the modular shaft seal and seal fluid auxiliary system, the vertical variable-frequency motor, the common base, the measuring instruments, and the control system. The MY coal slurry pump is a single-stage, single-suction vertical centrifugal pump, which can be used in applications such as low-pressure water-coal slurry pumps and slag pool pumps. The entire system utilizes new materials, new manufacturing processes, and high-quality components, ensuring the stability and reliability of its operation. Product features: 1. Wide flow rate adjustment range. The MY type centrifugal water-coal slurry pump boasts a wide range of adjustable performance parameters typical of centrifugal pumps, with no pressure fluctuations. Variable frequency speed control allows the pump’s speed to be adjusted precisely according to the requirements of the process flow, thereby optimizing the pump’s performance and achieving the desired operating conditions. 2. The pump is simple to operate, fast and convenient, and features a high degree of automation. The MY-type centrifugal water-coal slurry pump does not have the inlet and outlet control valves, gearboxes, or other auxiliary components required by piston pumps with hoses and diaphragms. Its operation is controlled by a system based on frequency converters, PLCs, and touch screens, making it fast and convenient while also ensuring a high level of automation. 3. High operational safety: The sealing mechanism utilizes a multi-layer sealing arrangement, and the sealing assistance system ensures proper functioning of the seals, thereby guaranteeing the safe and reliable operation of the pump. 4. Smooth medium transfer: Centrifugal pumps deliver the medium in a continuous, uniform, and stable manner, without the pressure fluctuations and overpressure issues associated with hose, diaphragm, or piston pumps. 5. Low wear: The specially designed structure along with the use of corrosion- and wear-resistant materials result in minimal wear. 6. Low vibration and noise: Thanks to its rational design, excellent stiffness and strength, as well as high rotor balance accuracy, the pump operates with minimal vibration and noise. 7. Easy maintenance: The structure of the centrifugal coal-water slurry pump is simpler than that of the hose-diaphragm piston pump. The pump casing features large doors on both sides, allowing the impeller along with other components such as the pump frame to be removed and installed as a whole from above, without having to move the inlet and outlet pipelines. 8. Low investment and maintenance costs, as well as small space requirements. The MY type centrifugal water-coal slurry pump was developed and manufactured by our company itself, which allows us to offer customers products and spare parts at the lowest prices with the fastest delivery times. The MY type centrifugal coal water slurry pump features a vertical structure, occupying less space and thus helping users save a significant amount of area. The supporting systems for the MY-type water-coal slurry pump system include: the pump’s automatic control system based on PLCs and touch screens, as well as the electrical control cabinet for the frequency conversion control system ； Sealing fluid assistance system ； Monitoring system. The pump automatic control system based on PLC and touch screen enables automatic operation, while the variable frequency control system can automatically adjust the pump’s speed in order to modify its performance and meet the requirements of the process. The seal fluid assistance system ensures the proper functioning of the mechanical seal ； The monitoring system provides feedback on the operating status of the pump. Operation modes of the MY-type water-coal slurry pump system The MY-type water-coal slurry pump system has two operation modes: manual mode and automatic mode. Technical level of MY slurry pump: This product combines the features of slurry pumps and chemical process pumps, addressing the challenges associated with transporting high-concentration water-coal slurry in the coal grinding and water-coal slurry transmission sections of gasification units; it thus holds great practical value. At present, our company holds multiple new technology patents related to the MY-type water-coal slurry pump.

Domestic water-coal slurry pump manufacturers: 1. Chongqing Water Pump Factory 2. Shanghai Dalong 3. Shenyang Metallurgy

High-pressure coal slurry pumps generally use foreign brands such as FELUWA Pumpen or GEHO PUMS, while low-pressure ones usually use domestic ones

The main types of slurry pumps used for coal slurry gasification in China are as follows:

I. High-pressure slurry pumps (hose, diaphragm type):
1. FELUWA
2. GEHO
3. Shenye

For solutions with four nozzles:
1. FELUWA – two pumps, double-cylinder double-acting type.
2. GEHO – two pumps, double-cylinder double-acting type.
3. Shenye – two motors, four pump units, triple-cylinder single-acting type; the flow rate is more stable compared to the double-cylinder double-acting type.

II. Low-pressure slurry pumps (positive displacement, centrifugal type):
Positive displacement pumps (hose, diaphragm type):
1. FELUWA
2. Shenye
3. Dalong
4. Chongqing
5. ...

Centrifugal pumps:
1. Shanghai Fostar
2. Shanghai No.1 Water Pump Factory Co., Ltd. (appears to be the same company as the first one, “FIRST”)

It seems there are reports that Jinling uses Shenye’s high-pressure pumps. Do any users who are aware of this situation know how they work?

Can a slurry pump be used in place of a coal slurry pump?

If the flow rate is not too high, a Vanah industrial pump can be used as a substitute. The Vanah industrial pump is also an imported diaphragm pump, but its cost is significantly lower compared to FELUWA and GEHO. However, the flow rate is subject to certain limitations; generally, a single pump is used for processes with a flow rate of less than 5 cubic meters per hour. Therefore, it is currently mainly used in water-coal slurry combustion and small gasifiers.