Overview of FRP pipe connection technology in FGD system 5.1:
1.1. in the flue gas desulfurization system, because many of the flow medium in a pipeline has strong corrosion resistance, so a lot of carbon steel pipe with rubber lining or glass fiber reinforced plastic (FRP) pipes, pipe connections are docking, is the two with the same diameter of glass tube or pipe fittings, flat grinding, docking, then from the outside glass fiber and cement adhesive. The glass steel pipe leakage must also trap in a special way. Connection way of glass fiber reinforced plastic pipeline in FGD system
5.2. job sequence:
5.2.1. - Measurement - drawing - Pipe - pipe cutting grinding nozzle cleaning - adhesive - aging treatment
5.3. operation method:
5.3.1 drawing review: check the drawings and site to determine the material, size, etc..
5.3.2 size measurement: measuring the size of pipes, fittings, etc.. 3.3 pipe cutting: according to the measurement of the size, with a marker pen in the pipeline on the cutting line, the use of grinding wheel cutting machine.
5.3.4 pipe grinding: within the docking interface flat, polished on both sides of 5cm external orifice.
5.3.5 nozzle cleaning nozzle: using acetone butt cleaning.
5.3.6 bonding:
5.3.6.1 adhesive material: surface felt, lining resin, chopped chopped felt, 0.2 cloth, chopped felt.
In accordance with the formula 5.3.6.2 configuration adhesive cement formula in accordance with the prescribed procedures of layered bonding (formula below).
5.3.7 aging: each layer of clay smear after construction, in accordance with the provisions of the drying time, and then a layer of adhesive.
5.4. safety management, civilized construction and environmental protection
5.4.1 process pipeline grinding, bonding, installation process prone to electric shock, fire and gas accidents, against objects, height, litter fall, lifting wounding and mechanical damage such as lifting operation accidents: glass steel bonding with the solvent acetone is volatile and flammable. 1 control measures: A glass fiber reinforced plastic 5 meters within the scope of the fire is strictly prohibited, smoking and other fire. B fire protection zone set fire signs.
5.4.1.2. flat, stationary components should be placed. C proper use of personal protective equipment and tools. D construction workers wearing masks, gloves and other protective equipment, grinding dust blown a set to two fan will be polished to prevent damage.
5.4.2. construction electricity
The construction of 5.4.2.1. platform should be grounded in accordance with safety regulations of lighting voltage.
5.4.2.2. source: not installed leakage protection, grounding, grounding conductor exposed, zero defect, aging, aging power switch, power line layout messy.
5.4.2.3. control measures 1) power supply must be installed leakage protection, and regularly check. 2 all electrical facilities must be exposed to the conductor shall not be exposed, and grounding, zero good. 3) timely replacement of aging lines, switches, etc.. 4) maintenance, installation of electrical equipment must be cut off the power supply, and the operation of a warning board. 5 (site) power supply layout, construction electricity must have professional electrician operation.
5.4.2.4. mechanical wounding, mechanical damage 1) dangerous source: pipeline parts combination, mechanical damage during installation, mechanical damage. 2). Control measures A mechanical transmission part must install protective cover. B machinery must be refueling, repair, inspection, adjustment, cleaning, must stop and cut off the power supply.
5.4.2.5 against objects, high drop 1) high operating personnel to prevent high falls, all equipment should be placed in a safe position, to prevent the bolt and nut material falling, is strictly prohibited throw down objects or tools. 2). Construction waste before work down and classification place, not allow it to fall or carelessly throwing.
5.4.2.6 high altitude 1) before the construction, the work of the person in charge and the safety of the construction environment should be checked to confirm that all safety measures can be done before the start of work. 2) the height of the operating personnel must fasten the safety belt, safety belt should be hanging above the safe and reliable place, the staff to improve self-protection awareness, do not hurt three".
5.4.3 security management
5.4.3.1 all personnel entering the site must wear safety helmets. Connection way of glass fiber reinforced plastic pipeline in FGD system
5.4.3.2 special operations personnel should be certified.
5.4.3.3 comply with all mechanical operating procedures.
5.4.4 civilized construction: analysis of environmental factors and preventive measures
5.4.4.1 environmental factors: corner waste. 1) environmental impact: waste of resources. 2) preventive measures: reasonable material, scrap should recover in time to do the work, cleaning materials and site.
5.4.4.2 environmental factors: dust flying, body pollution. Soil. 2) preventive measures: pipe surface grinding, use of axial flow fan dust discharging time.
Method for connecting 5.5. desulfurizing resin pipe:
The ratio of adhesive connection pipeline 5.5.1. cement: 100 copies of 30 copies, a small amount of resin, accelerant coagulant, small emery. Note: with clay, before adding resin, plus accelerator, then add potassium peroxide, finally curing agent. Methods: brush a layer of resin and the first layer of adhesive lining brush resin glue, if oil groove joints second layer winding seam and then brush resin, third layers of short stick paint resin fourth layers of short brush resin, then dry humidity (the specific time and temperature, weather related. 20 - 30 minutes) and then polished. Then brush the resin glue, fifth layers of short stick, brush resin, sixth layers of short stick, seventh layers of short stick, brush resin, eighth to thirteenth layers of glass cloth winding, each layer between the resin glue brush. The fourteenth layer is cut with a short stick, the purpose is to smooth the plane, and then brush resin glue.
5.5.2. pipeline leakage plugging adhesive