NOVELTY - A synchronous device has an electrolysis unit comprising a power supply, an electrolytic bath, a cycling system and electrolytic cell. The electrolytic cell is provided with an anode electrode, a cathode electrode, a gas purifying device and a clapboard with holes or diaphragm. The anode gas and the hydrogen gas generated during electrolysis are injected into the gas purifying device for purification. The upper and lower portions of electrolytic cell include an anode liquid inlet and outlet, and wastewater collecting groove.    USE - A synchronous device for treating waste water and preparing hydrogen.    ADVANTAGE - The device utilizes the porous clapboard, cation exchange membrane, cyclic system and electrode structure according to quality and characteristics of wastewater.    DETAILED DESCRIPTION - A synchronous device has an electrolysis unit provided with a power supply, an electrolytic bath, a cycling system and an electrolytic cell. The electrolytic cell is provided with an anode electrode, a cathode electrode, an anode area, a cathode area, an anode gas outlet, a cathode gas outlet, an anode gas washing device, a gas purifying device and a clapboard with holes or diaphragm. An electrolytic tank passes through the clapboard or cation exchange film, and is divided into anode area and cathode area. The anode electrode and cathode electrode are arranged in the anode and cathode regions of the electrolytic cell respectively, and connected through wire to the power supply. Anode gas generated from the anode area and hydrogen generated from the cathode area during electrolysis are entered into a gas purifying device for purification. The circulating system comprises a cyclic system in which electrolysis baths contain anode area and cathode area. Each anode region and cathode region containing upper portion and lower portion is provided with inlet and outlet for anode and cathode liquid water. Anode and cathode area can be used as clapboard with holes. A membrane or cation exchange membrane system comprises anode region and cathode region in the clapboard provided with holes, and water is added through the hole in such a way that the gas evolved does not enter into the other region of electrolytic cell. The anode region is located on the upper portion of the anode liquid water inlet and the cathode region is located on cathode liquid water inlet. Flow rate of the cathode liquid outlet pump is adjusted, ammonia is removed and made to enter into the waste water collecting tank. Down film heater distributing chamber consists of a liquid, two-layered sieve, screen holes, a heating chamber, a steam inlet, a condensed water outlet and an exhaust portion. Falling film heater includes liquid and a distributing chamber, which is provided with two-layered sieve plate, where the sieve plate with sieve contains a staggered solution. The upper portion of the liquid distribution chamber comprises an air outlet, an absorption device and a vacuum device, which is composed of a solution passing pipe, a shell pass in the heating steam space and condensed liquid. Falling film heater possess a water collecting tank, the upper portion of the water collecting tank is provided with an aeration inlet, the lower portion is provided with aeration disk and the bottom comprises outlet of the water collecting tank. The aeration inlet is directly connected with an air blower valve control and an absorption device comprises a first-level adsorbing device, ammonia absorber and utilizes multi-plate baffle absorbing groove or packing tower absorber. A vacuum device has vacuum pump and blower or air leg in the cylindrical electrode cycle system. The electrode in the electrolysis bath adapts a columnar electrode, an anode area and a cathode area with a column in the clapboard hole, cylindrical anode electrode and cathode electrode, and is concentric with holes and the cathode electrode is directly inserted with the cylindrical face of inner hole. Hydrogen generated from the cathode gas outlet and the anode gas evolved from anode area are purified by a purifying device.    DESCRIPTION OF DRAWING(S) - The drawing shows a hydraulic circuit diagram of a synchronous device.