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| Reactor equipment common faults and solutions |
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Broad understanding of the reactor vessel that has a physical or chemical reaction, through the structural design and configuration parameters of the container, to achieve the required heating process, evaporation, cooling and low-speed mixed function. Its widely used in pharmaceutical, food, chemical, rubber, pesticides, dyes, was used to complete the vulcanization, nitration, hydrogenation, alkylation, polymerization, pressure vessels and other processes of condensation.
Today, Xiaobian finishing reactor equipment failures on the eight common and troubleshooting.
I. Symptom: housing damage (corrosion, cracks, through hole)
Cause: one, by the media radiation (pitting, intergranular corrosion);
2, thermal stress cracking or alkali brittle;
3, wear thin or uniform corrosion.
Approach: 1, using corrosion-resistant materials to repair the lining of the case to be re-lined or local welding;
2, after welding to eliminate stress cracks should be repaired;
3, more than the minimum allowable thickness design, the need to replace the body.
Second, the failure phenomenon: over-temperature overpressure
Cause: 1, instrument failure, the control is not strict;
2, misuse; improper ratio of raw materials; produce violent reactions;
3, due to heat or stirring poor performance, resulting in side effects;
4, the intake valve malfunction intake pressure, the pressure is high.
Approach: 1, inspection, repair automatic control system, strictly enforce the rules;
2, according to the operation of law, to take emergency pressure release, according to the provisions of quantitative timed feeding, to prevent misuse;
3, increasing the heat transfer area or remove fouling and improve the heat transfer effect repair stirrer, stirring to improve efficiency;
4, off the total steam valve, repair broken steam valve.
Third, the failure phenomenon: seal leakage
Cause: packing
A stirring shaft at the packing wear or corrosion, resulting gap is too large;
2, oil ring position can not form inappropriate or oil plug seal;
3, the gland is not pressed, poor packing quality, or used for a long time;
4, packing boxes corrosion.
Mechanical seal
1, movement ring face deformation, bumps;
2, face pressure is too large, the friction generates heat distortion;
3, ring selection is wrong, the pressing force is not enough, or V-shaped seal installed backwards, losing tightness;
4, the vertical axis of the stationary ring face error is too large;
5, the operating pressure, temperature instability, hard particles into friction;
6, the shaft string exceeds targets;
7, inserts or bonding move, insert seam leaks static ring.
Treatment:
Packing
1, replace or repair the shaft, and processed on the machine, ensure roughness;
2, adjust the position of the oil ring, cleaning the oil;
3, compression packing, or replace the packing;
4, repair or replacement;
Mechanical seal
1, replace or re-friction grinding;
2, adjust the pressure to the right than to enhance the cooling system in a timely manner heat away;
3, ring selection, installation should be reasonable, there must be sufficient clamping force;
4, stop and re-alignment to ensure that no less than the vertical 0.5mm;
5, strict control of process indicators, granules and crystals can not enter friction;
6, adjustment, maintenance shaft so that the amount of channeling up to standard;
7, improved installation process, or the amount of interference should be appropriate, or bonding agents to be easy to use, secure.
Fourth, the failure phenomenon: the kettle has an unusual noise
Cause: an inner friction kettle agitator attachment (snake tube, thermometer tubes, etc.) or scrape the wall;
2, agitator loose;
3, lining drum kits, and stirrer impact;
4, agitators bent or bearing damage.
Approach: 1, downtime alignment, so there is a certain distance between the agitator and accessories;
2, down to check and tighten bolts;
3, bubbling repair or replace the lining;
4, repair or replace the shaft and bearings.
V. Symptom: Enamel agitator off
Cause: one is medium corrosion cracking;
2, the opposite direction of motor rotation.
Approach: 1, the replacement or repair of glass enamel steel shaft;
2, stop changing the steering.
Six Symptom: enamel kettle flange leak
Cause: 1 flange porcelain surface damage;
2 Select gasket material is unreasonable, improper installation fittings, space, wrong move;
3, Kazi loose or insufficient quantity.
Approach: 1, repair, paint or resin coated corrosion;
2, according to the technical requirements, select the gasket material, gasket interface to take the rope, the position should be uniform;
3, according to the design requirements, a sufficient number of clips, and to tighten.
Seven Symptom: porcelain surface and produce microporous fishscale
Cause: a jacket or stirring shaft inner tube into the acidic impurities, producing hydrogen embrittlement;
2, not dense ceramic layer, microporous risks.
Approach: 1, neutralized with sodium carbonate, the water rinse or repair, corrosion serious need of replacement;
2, a small number of micropores can repair serious update.
Eight, failure phenomenon: the motor current exceeds rated
Cause: 1, bearing damage;
2, the reactor temperature is low, the material viscosity;
3, spindle speed faster;
4, the agitator diameter is too large.
Approach: 1, replace the bearings;
2, follow the rules and adjust the temperature, the viscosity of the material is not too large;
3, the control spindle speed within a certain range;
4, appropriate adjustments. |
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