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Using advanced technology to reduce power consumption of caustic soda

Voltage drop. General asbestos diaphragm in the electrolysis process,[link widoczny dla zalogowanych], with the passage of time,[link widoczny dla zalogowanych], membrane swelling, the thickness to increase, expansion up to 800. The modified diaphragm, diaphragm asbestos adding some modifiers, high temperature heat treatment, the membrane becomes tightened, strength increases, the film thickness can be properly thinned, and its expansion is not to 25. Thus through the use of membrane technology can be modified to reduce the purpose of membrane voltage drop. 1.2 The use of expanded anode cassette polar distance between the anode and the anode is usually 8.5mm ~ ・ 18 ・ Shanxi Gui leak and festival directors in March 2003 11.5mm between the use of expanded anode, electrode distance can be reduced to 3mm This reduces the voltage drop of electrolyte, electrolyte voltage drop can be expressed. V = DXL,[link widoczny dla zalogowanych], where: - electrolyte voltage drop (V) - the distance between anode and cathode (cm) D - current density (A / cm) X - electrolyte conductivity (Q ・ cm) from the type look out, when the electrolyte concentration,[link widoczny dla zalogowanych], temperature and current density is constant, the electrolyte between the anode and cathode voltage drop and proportional to the distance between the expanded anode reduced very moment, you can reduce the electrolyte voltage drop. In short, from the theoretical analysis using modified diaphragm and expansion of anode technology, can reduce the cell voltage 0.2V ~ 0.25V, saving power consumption per ton of caustic soda 140kwh ~ 200kwh. 2 cell transformation process of technological progress and the current implementation of the program cell transformation of the overall process of technological progress is the use of existing public works programs and chlor-alkali production system, increasing a brine procedure. PGK microporous filter tank makes people shake salt, Ca, Mg content significantly reduce buffeting and SS, to divide the modified requirements, tank repair to improve the procurement of a Taiwan special modified diaphragm curing oven, the expansion of the use of advanced anode and modification of membrane technology, the use of the normal maintenance cycle power slot, the existing 30 to 60 type Ⅲ metal anodes and anode all converted into a modified diaphragm cell expansion system, electrolyzer operating current density from the current 16A / cm rose 20A/cm, so that the caustic soda production capacity of the company 4 million t, t based on the original Base lower power consumption 150kWh. The project was started early in April 2002 implementation date of the project is implemented smoothly and repair slot transformation process has been completed,[link widoczny dla zalogowanych], modified diaphragm curing oven has purchased and put into operation, PGK microporous filter effect is ideal to use human salt water tank shaking in Ca, Mg content was shaking and ss 2mg / I below, the restructuring has been completed cell 20. 3 Effect of some 3.1 to implement expansion of anode slot operation (see Table 1) of the original cell before the restructuring is not the average cell voltage is 3.38V, 20 from the post-reform situation, the cell voltage can be reduced 0 .23 V. Benefit Analysis of Investment Estimate Table 3.2, Table 2. 3.3 3.3.1 Project economic situation after the reform of energy-saving benefits each year, at the same operating current density, electric slot after the reform the average saving is 60 × 0 .23-138 Table l expansion of anode operation l6A/dm slot slot slot voltage /,, slotted Date (day) 1-43. O1O5-3O1-93. O907 A O31-113. Q305 A O51-123. O307-211-163. OO07 a O11.183. O8O6-151-2O3.1205-261-223. O506 A O31-233. O2O7-151-243.1605-281-283.11O7-131-302.9705 A O32-53. O7O7-112-63. O2O7-192-82.946-132-93. O46-252-123.1306 A O12-153.1OO6-112-273. OO06-2O2-292.9807-23 average 3.047 Table Table 2 Estimated Investment Total investment / million PGK filter 2O. O Electric Solid furnace 1O. 5 repair slot transformation 1O. O anode sheet restructuring 3OO. O isolation sintered rod costs 2.6 4.5 4.2 modifier other 3O. O Total 381.8kwh /, ・ 100NaOH the full 60 slots after the reform of Taiwan Power Company, the annual count by 40,001, saving for the 6440000kwh, energy-saving benefits of 2.254 million yuan. 3.3.2 Project benefits increase each year after the reform: caustic soda increase 1000t, a corresponding increase in the actual production of caustic soda solid caustic soda off 104】 7t, chlorine production of 7531t, to increase hydrochloric acid production 5800t, a corresponding increase in the total profit of 4,364,700 yuan.
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