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Today, Xiao Bian put together eight common failures and remedies for reactor equipment.
First, the failure phenomenon: shell damage (corrosion, cracks, through holes)
Failure reasons: 1, by the media radiation (pitting, intergranular corrosion);
2. Thermal stress affects cracks or alkali brittleness;
3, wear thin or uniform corrosion.
Treatment method: 1. The shell lined with corrosion-resistant material must be repaired or partially repaired;
2, to eliminate stress after welding, cracks to be repaired;
3. Exceeding the minimum allowable thickness of the design, the body must be replaced.
Second, the phenomenon of failure: overtemperature and overpressure fault causes: 1, instrument failure, control is not strict;
2. Misoperation; improper ratio of raw materials; violent reaction;
3, due to poor heat transfer or stirring performance, produce side reactions;
4, intake valve failure Intake pressure is too high, high pressure.
Treatment methods: 1. Check and repair the automatic control system and strictly implement the operating procedures;
2.According to the operation method, take emergency pressure, according to the provisions of regular quantitative feeding, prevent misuse;
3, increase the heat transfer area or remove scale, improve the heat transfer effect to repair the stirrer, improve the mixing efficiency;
4, off the total steam valve, steam valve repair.
Third, the phenomenon of failure: seal leakage fault causes: packing seal 1, stirring shaft at the packing at the wear or corrosion, resulting in excessive clearance;
2. Oil seals cannot be formed if the oil ring is improperly positioned or the oil line is blocked;
3, the gland is not pressed, the filler quality is poor, or it is used too long;
4, stuffing box corrosion.
Mechanical seal 1, static and dynamic ring end surface deformation, bruising;
2, the end face pressure is too large, friction pair thermal deformation;
3, the sealing ring material is not right, the pressing force is not enough, or the V-shaped sealing ring is installed in reverse, losing the seal;
4. The vertical error between the axis and the static ring face is too large;
5, operating pressure, temperature instability, hard particles into the friction pair;
6, shaft string exceeds the index;
7. Inserting or sticking joints leaking from moving and stationary rings.
Approach:
Packing seal 1ã€Change or repair the stirring shaft and process it on the machine to ensure the roughness;
2, adjust the position of the oil ring, clean the oil circuit;
3, press packing, or replace the packing;
4, repair or replace;
Mechanical seals 1, replacement of friction pairs or re-grinding;
2, adjust the pressure than appropriate, strengthen the cooling system, timely removal of heat;
3, sealing ring material selection, installation should be reasonable, there must be enough pressing force;
4, stop, re-correction, to ensure that the verticality is less than 0.5mm;
5, strict control of process indicators, particles and crystals can not enter the friction pair;
6, adjustment, maintenance so that the amount of shaft to achieve the standard;
7. Improve the installation process, or the amount of interference should be appropriate, or the adhesive should be easy to use and secure.
Fourth, the phenomenon of failure: abnormal noise inside the kettle causes: 1, agitator friction inside the kettle attachment (snake tube, thermometer tube, etc.) or scraping the wall;
2. The stirrer is loose;
3, lining bulge, and stirrer impact;
4, agitator bending or bearing damage.
Treatment method: 1, downtime maintenance to find out, so that there is a certain distance between the stirrer and accessories;
2, stop inspection, fastening bolts;
3, repair bubble, or replace the lining;
4, repair or replace the shaft and bearings.
Fifth, the phenomenon of failure: enamel mixer off reasons: 1, was the media corrosion fracture;
2. The motor rotates in the opposite direction.
Treatment methods: 1, replace the enamel shaft or repair with glass fiber;
2, stop changing steering.
Six, failure phenomenon: enamel kettle flange leak Causes: 1, flange porcelain surface damage;
2, choose the gasket material is not reasonable, the installation of joints is not correct, empty, misalignment;
3, loose or insufficient number of clips.
Treatment methods: 1, repair, coating anti-corrosion paint or resin;
2, according to process requirements, select the gasket material, gasket interface to be close, the location should be uniform;
3, according to design requirements, there are a sufficient number of clips, and to tighten.
VII. Failure phenomenon: Causes of scale explosion and micro-hole failure on porcelain surface: 1. Acid impurities in the jacket or agitator shaft tube, resulting in hydrogen embrittlement;
2, the porcelain layer is not dense, there are hidden holes.
Treatment methods: 1. After neutralization with sodium carbonate, flush or repair with water, and the corrosion must be replaced;
2, the number of micropores can be patched, serious updates.
VIII. Failure phenomenon: The motor current exceeds the rated value. Causes of failure: 1. Bearing damage;
2. The temperature in the kettle is low and the material is thick;
3, spindle speed faster;
4, the mixer diameter is too large.
Treatment method: 1, replace the bearing;
2, according to operating procedures to adjust the temperature, the viscosity of the material can not be too large;
3, control the spindle speed within a certain range;
4, appropriate adjustments.
Analysis of Eight Common Faults in Reactor Equipment and Remedy
The broad understanding of the reactor means that there is a physical or chemical reaction container. Through the structural design and parameter configuration of the container, the heating, evaporation, cooling and low-speed mixing functions required by the process are realized. Its widely used in medicine, food, chemical industry, rubber, pesticides, dyes, is used to complete the sulfide, nitration, hydrogenation, hydrocarbonization, polymerization, condensation and other process pressure vessels.