FJX stainless steel forced circulation axial flow pump

NegotiableUpdate on 05/12

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Nature of the Manufacturer: Producers

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Overview

FJX stainless steel forced circulation axial flow pump is manufactured according to universal standards, which is efficient, energy-saving, and easy to maintain. It is suitable for industries such as diaphragm caustic soda, phosphoric acid, vacuum salt production, lactic acid, calcium lactate, aluminum oxide, titanium powder, calcium chloride, ammonium chloride, sodium chlorate, sugar production, molten salt production, papermaking, and wastewater treatment for evaporation, concentration, and cooling. To improve equipment production capacity and increase the heat transfer coefficient of heat exchangers for forced circulation.

Product Details

■ FJX Stainless Steel Forced Circulation Axial Flow Pump Product Overview:

Stainless steel chemical axial flow pump, forced circulation pump, forced evaporation circulation pump

FJX type forced circulation pump is a high flow, low head axial flow pump. The FJX type forced circulation pump is manufactured according to universal standards, which is efficient, energy-saving, and easy to maintain. It is suitable for industries such as diaphragm caustic soda, phosphoric acid, vacuum salt production, lactic acid, calcium lactate, aluminum oxide, titanium powder, calcium chloride, ammonium chloride, sodium chlorate, sugar manufacturing, molten salt, papermaking, wastewater, etc. It is used for evaporation, concentration, and cooling to improve equipment production capacity and increase the heat transfer coefficient of heat exchangers for forced circulation.
Installation position: Ground foundation (elastic support can be configured according to user needs) directly suspended on the evaporator.
Pump form: vertical, horizontal.
Transmission methods: direct drive, belt drive, hydraulic coupling, universal joint drive.
Sealing structure: combination mechanical seal, packing seal.
Pump body manufacturing methods: casting, welding.

■ FJX stainless steelForced circulation axial flow pumpWorking Principle:

FJX forced circulation axial flow pump does not rely on the centrifugal force of the impeller to transport liquid, but uses the thrust of the rotating impeller blades to make the transported liquid flow along the pump shaft direction. When the pump shaft is driven to rotate by the electric motor, the blades have a certain helix angle with the pump shaft axis, which generates thrust (or lift) on the liquid, pushing it out and discharging it along the discharge pipe. After the liquid is pushed out, a local vacuum is formed at its original position, and the liquid outside will be sucked into the impeller along the inlet pipe under the action of atmospheric pressure. As long as the impeller continues to rotate, the pump can continuously suck in and discharge liquid.
FJX type forced circulation axial flow pump, with a maximum head of 5 meters and a flange standard of 6 kilograms. It can also be customized and modified as needed.

■ Advantages of FJX stainless steel forced circulation axial flow pump:

Zhongnai Company has introduced and absorbed the characteristics of similar products at home and abroad, and made significant adjustments to the product structure to ensure the reliability, economy, and safety of pump operation. Its advantages are mainly manifested in:
1. The speed is low, generally within 980r/min, which meets the requirements of the crystallization process and runs smoothly.
2. Excellent hydraulic performance, efficiency>70%, wide high-efficiency zone, and good anti cavitation performance.
3. Consider the flow direction of the pump medium to be vertically downward and horizontally outward. The significant impact of water flow force on the pump shaft requires the installation of a pump shaft sleeve protective device inside the pump body. By transferring the diving force of the medium to the pump body, the stable operation of the pump is ensured, greatly reducing the impact of the medium on the mechanical seal force and extending the service life of the mechanical seal. The improvement of this structure has taken a significant step forward among similar products in China. In addition, the pump body adopts integral casting with good rigidity, and the intermediate support structure is stably connected.
4. The bearing box is a square large-span heavy-duty structure with good stability, strong load-bearing capacity, and reliable operation. Compared with similar domestic products, it is easy and accurate to install (the original domestic bearing box was a split type). Radial short cylindrical bearings and heavy-duty paired bearings are used at the front and rear ends respectively. All of its bearings are made of NSK (SKF) or high-quality domestic bearings.
5. The shaft seal is well sealed, using a combination of secondary impeller power seal and Bergman quick installation double end mechanical seal, with external cooling and flushing water to improve the working conditions of the shaft seal, resulting in a long service life of the mechanical seal. The outer circle of the shaft sleeve is enlarged, and compared with similar domestic products, the wall thickness is thickened and the deformation is small.

■ Technical parameters of FJX forced circulation axial flow pump:

Flow rate: 300-23000m3/h
Lift: 2-7M
Work pressure: 0.1-0.7MPa. G
Working temperature: -20 ℃ -480 ℃

■ Performance parameters of FJX forced circulation axial flow pump:

model	trafficQ （m3/h）	headH （m）	Power（KW）		efficiency （%）	speed （r/min）
model	trafficQ （m3/h）	headH （m）	shaft power	Motor power	efficiency （%）	speed （r/min）
FJX-250	300	2.5	3.4	7.5	60	980
FJX-300	520	3	6.8	11	62	980
FJX-350	1350	4	29.6	37	65	980
FJX-450	2200	4	46.8	55	68	980
FJX-500	2650	4	42	75	70	740
FJX-550	4000	4	62.8	110	70	750
FJX-700	4772	3.3	56.7		75.6	370
	5320	3.4	64.7		76.1	400
	5700	3.5	70.7		76.9	430
	6154	3.6	78.8		76.6	460
	6579	3.6	85.8		75.2	490
FJX-800	6142	3.8	84.3		75.4	500
	6790	3.8	86.7		76.8
	7400	3.7	96.6		77.2
	7815	3.7	102.7		76.7
	8417	3.8	115.7		75.5
FJX-900	7748	3.4	94.3		76.1	424
	8407	3.4	100.6		77.4
	9000	3.5	110		78
	9656	3.5	119.1		77.3
	10280	3.6	130.2		77.4
FJX-1000	9210	3.4	111.8		76.3	380
	1078	3.5	132.6		77.5
	11000	3.5	134.4		78
	11970	3.6	151.1		77.3
	12700	3.6	162.8		76.5

■ FJX type forced circulation axial flow pump faults and troubleshooting methods:

fault phenomenon	cause of failure	exclusion method
Axis power approaches or exceeds the rated power of the motor	1The liquid level in the evaporation chamber decreases; 2Heating tube crystallization or crystal block detachment blocking the heating tube; 3The pump flow rate is too high, and the pump is running at a low flow rate; 4． The concentration of liquid and solid phases in the evaporator increases, and the medium degree exceeds the design value.	1The liquid level has risen to the normal value; 2Clean the evaporator; 3Reduce the pump speed; 4Check the liquid-solid separation equipment and evaporation operation of the evaporation system
The operating flow is lower than the design requirements	1Heating tube crystallization, crystal blocks blocking the evaporator circulation tube and heating tube; 2The pump speed is insufficient; 3Severe blade wear; 4The radial clearance between the impeller and the pump body is too large; 5The resistance of the evaporator circulation is greater than the design head of the pump (unreasonable pump selection)	1Wash and fill the evaporator; 2Check if the belt is slipping and tighten the belt 3Replace the blades; 4Weld the outer edge of the blade, then process or replace the impeller; 5Increase the blade installation angle or increase the speed. If the motor power is insufficient, replace it.
Excessive leakage of shaft seal	1Crystals enter the friction surface of the machine seal, causing excessive wear on the dynamic and static rings.	1Increase the pressure of the internal flushing fluid. If the sealing surface of the dynamic and static rings is worn, they should be repaired or replaced.
Excessive pump vibration or noise	1The liquid level of the evaporator is too low; 2． The vortex in the tangential feed evaporation chamber carries steam into the downcomer circulation pipe; 3Loose blades and unbalanced impellers; 4The inlet side of the pump is partially blocked by crystal blocks or foreign objects.	1Increase the liquid level of the evaporator; 2Add vortex eliminators or increase the diameter of vortex eliminators to the lower cone of the evaporation chamber; 3Adjust the installation angle of each blade and fix it firmly, and perform static balance on the impeller; 4Open the evaporator inlet for investigation and perform washing and filling operations.
The bearing temperature is too high	1The axial clearance of the outer radial thrust bearing is too small; 2The oil return groove on the inner side of the inner and outer bearing covers is not placed below; 3The lubricating oil level is too high or too low; 4Lubricating oil enters the water or deteriorates.	1Reduce the thickness of the gasket at the outer bearing cover and adjust the axial clearance to the specified value; 2The arrows on the inner and outer bearing covers should be directly above; 3Check if the constant position oil cup is blocked; 4Conduct a pressure test to check for sand holes in the water-cooled jacket and replace the lubricating oil.