1overview
Application scope
The FJX series evaporative circulation pump is a high flow, low head axial flow pump designed for forced circulation of evaporators in industries such as ammonium phosphate, phosphoric acid, vacuum salt production, alumina, caustic soda, and light industry. It can also be used as a circulation pump for crystallizers and reactors.

performance parameter

Flow range: 300-12000m ³/h

Head range: 2-4m

Work pressure: 1MPa · G

Working temperature: ≤ 170 ℃

Flow: When placing an order, the user should provide a detailed data sheet, and our company will recommend a reasonable pump model based on the required flow rate, head, and medium characteristics.

Model Description

Material of overcurrent components

The main materials for the pump body, impeller, rear cover, shaft seal box, shaft sleeve, shaft protection sleeve, throttling ring, impeller cover and other overcurrent components are 1Cr18NI9TI, 0Cr19NI9, 1Cr18Ni12Mo2TI, 316, 316L, 20cb3, CD4MCu, etc., which can be selected for different working conditions.

IISTRUCTURE DESCRIPTION
The FJX series circulating pump is a cantilever structure, installed horizontally, and some specifications have absorbed the advantages of advanced foreign products. Therefore, it has the following characteristics:
1. Slow speed type: meets the requirements of crystallization process and runs smoothly.
2. Excellent hydraulic performance, efficiency>70%, wide high-efficiency zone, and good anti cavitation performance.
3. Advanced shaft seal: Adopting a quick installation double end mechanical seal, equipped with a labyrinth type internal isolation chamber, improving the working conditions of the shaft seal and prolonging its service life.
4. Adjusting pump parameters is easy: the blade installation angle can be adjusted, and changing the speed of the belt drive is easy.
5. High reliability: A guide air chamber is installed at the cantilever end of the shaft to reduce shaft deflection.
6. Water cooled bearing seat: There are water-cooled jackets at the two bearing positions, lubricated with thin oil, and D-grade heavy-duty bearings are selected for long service life.
Special Forms
1. Suspended pump: The circulating pump is suspended below the evaporator circulation pipe and expands with the evaporator, eliminating the expensive large-diameter corrugated expansion joint of the evaporator and reducing the footprint.
2. Spring pump base: There is an adjustable spring box under the pump base, which can eliminate the waveform expansion joint of the evaporator.
3. Built in circulation pump: no pump body, specifically designed for internal circulation evaporators or crystallizers.

IIITechnical Performance Table

Note: When the performance of the pump is not within the listed range, the performance can be changed by changing the speed. The performance of variable speed is calculated according to the following formula:
Traffic Q ´/Q=(n ´/n)
Head H ´/H=(n ´/n) ²
Shaft power P ´/P=(n ´/n) ²
② The power and speed of the supporting motor are determined based on the flow rate, head, and medium density required by the user, as well as the required impeller linear velocity. The auxiliary power is calculated by multiplying the shaft power of the clean water in this table by the specific gravity and suspension correction factor.

4install
1. Before installation, the basic dimensions, position, and surface condition should be checked. Whether the elevation meets the design requirements, otherwise repair will be carried out. The foundation surface should be sandblasted and moistened.
2. Clear the accumulated water and debris in the reserved holes of the anchor bolts. Insert the anchor bolt into the bolt hole of the base, place the washer, preliminarily tighten the nut, place the pump unit on the foundation, and leave a certain grouting gap between the base and the foundation. Use a level to check the axial, perpendicular, and vertical flange surfaces of the pump's horizontal flange surface, with a maximum allowable deviation of 0.1mm/m.
3. Pour high-grade concrete into the anchor bolt holes, wait for the concrete to solidify (at least 48 hours), tighten the nuts of the anchor bolts, check the levelness and verticality, and correct them.
4. According to the installation diagram of the circulating pump, pour concrete into the base. The entire space of the base should be filled to be flush with the surface of the channel steel base, and concrete should also be poured around the channel steel to bury the entire steel base in the secondary grouting layer.
5. Install the motor slide rail and motor. The parallelism deviation between the motor axis and the pump axis (0.5mm/m) should be checked when powered on to ensure that the motor's direction of rotation is consistent with the pump installation diagram. The pulley should be installed and securely fixed. For direct coupled transmission, the two couplings should be checked for straightness.
6. The inner circumference of the V-belt should be selected, and the error of the inner circumference of each V-belt on the same pump should be less than 0.2%. It should be checked with a steel ruler, and the outer ends of the large and small pulleys should be on the same plane. The axial displacement should not exceed 0.5mm.
7. Connect each auxiliary pipeline (internal flushing pipe at the shaft seal box, condensate inlet and outlet pipes, shaft seal leakage discharge pipe, bearing seat cooling water inlet and outlet pipes) according to the pump installation diagram, and configure pressure gauges, flow meters, and globe valves.
8. In addition to using suspended and spring-loaded pumps, waveform expansion joints should be installed on the evaporator circulation pipes connected to the pump inlet and outlet. Calculate the thermal expansion based on the height from the bottom of the evaporator main support to the pump interface flange, the thermal expansion coefficient of the circulating pump material, and the difference between the maximum operating temperature of the evaporator and the installation temperature of the pump. Select the diameter, nominal pressure, and wave number of the expansion joint according to the JB1121-83 "Waveform Expansion Joint" standard. Check the table to determine the thermal expansion force acting on the inlet and outlet flanges of the pump during the operation of the evaporator.

5run
1. The oil storage chamber of the bearing should be cleaned thoroughly, and lubricating oil should be added to the oil tank according to the method described in Section 6, Clause 2 of this manual.
2. Open the flushing fluid of the shaft seal box, the valves on the inlet and outlet pipes of the sealing fluid (condensate water) and the inlet and outlet pipes of the bearing seat cooling water, and adjust the pressure and flow rate of the fluid on each pipe to meet the following requirements:
(1) The pressure of the flushing solution (such as brine) inside the machine seal should be greater than the system pressure by 0.03-0.05mPa.
(2) The inlet pressure of the cooling water for the bearing seat is 0.2MPa.
3. Before starting, the pulley or coupling should rotate flexibly.
4. The circulating pump can only be started when the water (or working medium) enters the evaporator and reaches the normal liquid level in the evaporator chamber. It is strictly prohibited to start the pump at a low liquid level to prevent excessive charge from burning out.

VIMaintenance
1. Mechanical seal
(1) Check and adjust the pressure and flow rate of the flushing and sealing fluids inside the mechanical seal every two hours.
(2) Check once per shift whether the sealing liquid outlet contains working medium, otherwise adjust the pressure of the internal flushing liquid and sealing liquid.
(3) When the leakage at the shaft seal exceeds the standard or the consumption of sealing fluid is large, if it is determined that the seal has been damaged, maintenance should be arranged. Polish or replace the sealing surface of the worn dynamic and static rings, while the O-ring must be replaced every time it is inspected.
2. Lubrication and cooling of bearings
(1) The selection of lubricating oil requires that the kinematic viscosity of the lubricating oil should not be lower than 12mm2/S within the working temperature range of the bearing to ensure good lubrication conditions.
(2) Refueling method: First, add lubricating oil from the oil hole above the bearing box. The oil should be added to the branch pipe of the constant oil cup until it is filled or marked with the oil mark.
(3) Oil change cycle: After the first use or bearing maintenance of the pump, the oil should be drained after 10 days of operation, the oil tank should be cleaned, and new lubricating oil should be injected. The normal oil change cycle depends on the working temperature of the oil tank. If the oil temperature is 40-65 ℃, the oil change cycle is one year. If the oil temperature is>65-75 ℃, the oil change cycle is six months.
3. Pump performance
(1) The actual operating flow rate of the evaporation cycle is determined by the head flow characteristics of the circulation pump and the resistance drop of the evaporator circulation loop. When production requires changing the pump flow rate, the pump speed can be changed by replacing the pulley first. The change in pump performance after changing the speed can be calculated according to the following formula. Note that the shaft power should not exceed the rated power of the motor when accelerating, otherwise increase the motor power.
Traffic Q/Q=n/n ₁
Head H/H=(n/n ₁) ²
Shaft power P/P=(n/n ₁) ²
(2) For externally heated evaporators with tangential feed to the evaporator chamber, in order to prevent the harm of vortices to the pump in the evaporator chamber, a cross shaped vortex eliminator should be installed below the conical shell of the evaporator chamber.
(3) Parking
When stopping the evaporator, the circulation pump should be stopped first, then the materials in the evaporator should be discharged, and finally the internal flushing solution and sealing solution of the mechanical seal should be stopped.

7Causes and elimination methods of faults

8、 The appearance and installation dimensions of the pump

Note: According to user requirements, a spring-loaded base plate or a rigid base plate can be used.

FJX-700Installation size

FJX-800Installation size

FJX-900Installation size

FJX-1100Installation size