Hydrogen electrolyzer splits water into hydrogen and oxygen. Electrolyzer by a number of small chambers, each chamber is made paddles, net pay very, diaphragm gasket composition.

First, on-site technical safety measures
Dress all staff 1 site, using tools and instruments shall comply with the safety requirements
2 will run the equipment and maintenance of equipment to isolate the power rectifier cabinet.
3. The maintenance work should be carried out every two hours, measured in the area of ​​maintenance work in the air hydrogen content.
4 during the degreasing operation, should be in the outdoors, such as must be carried out indoors, the air volume of acetone should not exceed 400mg / m3.
5 maintenance of industrial equipment, materials, spare parts neatly overhaul sites "three no landing.
Second, before the overhaul of spare parts requirements
1 spacer plate outside smooth no scratches, no debris attached to them. Gasket rigorous uniformity, no cracks, bending phenomenon.
2 shim thickness measuring chip size difference must not exceed 0.20mm, 50 Pian cumulative deviation should not exceed 0.50mm.
3 dowel hole size deviation should not exceed 0.5mm.
4 gas-liquid tunnel rigorous burr.
5 asbestos cloth density 10 * 10cm2 per warp threads 138, 174 for the weft, warp and weft textile uniform, radio head and fracture.
6-pole cable box sealed well, no dirt, no penetration stripes, no large-scale deformation phenomena.
7 plate surface without corrosion products, nickel layer intact, no penetration sealing line stripes, clean and free of dirt.
8 spring no distortion, no cracks metallographic examination.
Third, the preparation and examination
1 electrolyzer withdraw alkali lye tank, and with plenty of demineralized water is flushed until the water is clear and transparent so far.
Each valve switching and leakage 2 Check the hydrogen production system.
3 pole inspection cleaning cabinet, plate, main pole Ying, asbestos cloth and other components
4 Check the fastening bolts, nuts and disc springs
5 record four main plate spacing and height of the spring butterfly.
6 from the positive to the negative electrode in order to play word number on each pole frame.
7 to clean the external cell product base and make a mark at the base of the seepage.
8 breaking all connections and all kinds of pipe fittings and flanges attached to the cell, do good marker 9, nozzle with a cloth.
10 The four stud bolts evenly in turn release.
11 out of the upper portion of a bolt and remove the disc spring set.
No. 12 followed by unpacking boxes, plates.
13 Remove all pole frame and plate, should be placed on the board can not be stacked in order to prevent the joint surface damage and deformation of parts.
Fourth, the process of cell repair and overhaul quality
1. The dirt on the plates with a copper wire brush and rinse with clean demineralized water
2. Check the plate corrosion anode and cathode corrosion
3. Check and clean sealing line, the clean-up can only use a brass brush or wooden tools
1 plate and the plate should be connected securely attached, no loose
4. nickel anode side plate without serious loss or peeling phenomenon
5. The inner sealing plate line no debris, no penetrating stripes
6. lax plate sealing surface of no more than 0.2mm
Pole frame
1. washed with brine pole frame and asbestos cloth dirt removed, and scrub with a soft brush
2. Check the airway and lye channels
3. Clean pole box seal lines, the clean-up can only use a brass brush or wooden tools
4. Check breathable asbestos cloth case and do experiments, such as failure should be replaced
5. The sealing line pole frame No dirt, no penetrating stripes
6. The pole ring opening frame in place, pads firm, without loose
7. After translucent stone cotton experiment without translucent spots, no cracks and loosening
8. pole frame stomatal conductance and lye channels without clogging dirt
Fifth, cell attachment
1. Clean threaded tightening bolts and nuts, remove rust, tighten the threaded bolt thread good no mess
2. Check whether the deformation of the disc-shaped spring, the disc springs no distortion, no cracks. And metallographic examination
3. Check bakelite insulating gasket should be no break
4. Check the hydrogen, oxygen, alkali channels should be free from contamination
Sixth, stone cotton light test and installation
Light test
1 pole frame containing asbestos cloth placed through the aperture barrel, barrel ring containing three 60W bulbs, light from the cloth distance 400mm.
Experimental examination should be carried out in a dark room.
3 When the transparent point should be found and marked with a marker when translucent stone cloth dot diameter greater than 0.2mm, which points at 10 points or more should replace asbestos cloth, smaller than this standard can be repaired.
replace
1 pole box on the desk, a very uniform along the inner diameter of the auxiliary block away, and the split ring on the auxiliary good asbestos cloth, asbestos Brad tight fixtures mounted on the diaphragm box and hoop split ring, symmetrical tightening bolts fastening fixture on both sides of the tension measuring jig opening ring convex portion does not exceed the difference between 0.5mm, the asbestos cloth installation was successful.
2 pole along the interior trim box asbestos cloth.
3 Remove the tensioning fixtures, sheet lightly with a wooden hammer to knock in the opening split ring.
4 with a drill to remove hydrogen, oxygen, stone cotton base tunnel debris, to maintain its flow.
Seven cell assembly
Check the insulation spacer 1 level with spirit level, a height of not more than ± 2mm.
All parts before assembly cleaning C copper. The plates move along the pole to 80mm.
On the main board of the pole position tension bolts installed insulation sleeve and mounted on the tension bolts, following tightening bolts 2 Adjust the horizontal position, the horizontal deviation is less than 2mm.
3 The six locating pins mounted on the main cathode plate and top plate washer hung up, and then install the pole frame, the opening side of the ring to the main cathode plate during installation.
4-pole frame, plate, according to the intermediate pole box number when removing all installed, and not any debris falling into the cell interior installation.
The tension bolts penetrate and set a good conch slices.
Eight, cell fastening
Tight hot cell
1 from one end of the cell through the hole into the ditch hydroxide 0.1-0.15MPa steam discharged from the lye inlet tube is heated, the heating must be carried out continuously. Heating start every 2 hours evenly tighten bolts electrolyzer, the difference between the amount of each fastening bolt tight into the maximum size does not exceed 1mm.
2 In the process of tightening the bolt, the amount of compression of the disc-shaped spring is not greater than 4mm, measuring two main corners of the plate spacing is not more than 0.1mm.
3 heated for about 30-40 hours after stop, then tighten bolts 1-2 times, cooling behind the electrolytic cell to be tightened once, but no more than the tightening torque 4400kgf / m.
4 fastening two main electrolytic plate size should be equal to or before removing the last second fastening dimensional stability that is qualified unchanged.
Cold cell tight
1 cell cold spring directly tighten the bolts in the cell under cold, but hot tight tightening time and the same.
Each bolt load cell 2 reaches 4400kgf / m, for a pressure test of the electrolyzer.
Hydrostatic Test IX electrolyzer
After cooling, the electrolytic cell 1 to hydrostatic test, first filled with water, gradually reducing the pressure from 0.8MPa mentioned 1.2MPa, after 10 minutes, if the pressure does not drop, the pressure was reduced to 1.0MPa inspection, if found locally leakage, may once again tighten the bolt, after passing the test pressure, such as the cell is not up and running, should be within the electrolytic cell filled with 10% potassium hydroxide solution to prevent rusting.
Ten, the cell assembly process elements
1 cell assembly vertically stacked manner, a number of the cell plate number ,, accurate positioning is critical, otherwise inevitably distorted.
2 calibration assembly base, making positioning the monitor, ensure correct positioning stacked process.
3 The electro-hydraulic technology, but with more than just the level stretcher, diagonal carry out work to ensure that all parts of the pressing force uniform.
4 Use professional tools to monitor various gaskets and insulation plate stress situation. Avoid discontinuity phenomenon. Effect of cell sealing and service life.
5 cell using a plurality of tension bolts, gaskets and more uniform force.
After 6 cell multi-channel technology and visual inspection, checking and sealing pressure.
7 After the inspection and quality inspection departments, according to the company standard packaging and storage.