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This post was last edited by Guan Gongyu on July 28, 2016, at 22:25. The grand “public welfare” event organized by HaiChuan Wike has successfully taken place! http://bbs.hcbbs.com/thread-1576975-1-1.html (Source: Haichuan Chemical Engineering Forum) The Super Reward Board event is now in full swing! ! http://bbs.hcbbs.com/thread-1436442-1-1.html Current main topics for Witkey bounty campaigns (updated weekly): Summary of Witkey bounty campaigns; Last updated on July 28, 2016. No. Title Amount of Haichuan coins offered Status 1 Please conduct system testing for this technical Witkey (expert in technology) and provide a detailed user tutorial. 1000 In progress 2 A Witkey willing to accept Haichuan coins (180 Haichuan coins) is needed to prepare the required design documents based on the provided design drawings for a horizontal pressure vessel. 180 In progress 3 Seeking information regarding foreign trade export companies dealing with electromechanical pumps and valves, as well as international projects related to chemical engineering and environmental protection. 180 In progress 4 Haichuan coins: [Instructions for DCS control of centrifugal pumps] 100 In progress 5 Haichuan coins Witkey: Does anyone know which domestic factories are producing such axial flow pumps? 80 In progress 6 Haichuan Coin Wiker – Sealing issues in the solid powder feeding system 50 In progress 7 Seeking 50 In progress 8 Questionnaire regarding corrosion prevention in MTBE/butene plants 50 In progress 9 How to effectively learn various control theories 30 In progress 10 [Haichuan Coin Wiker] Request for PID diagrams related to a 3.5 million-ton heavy oil catalytic cracking plant 30 In progress 11 Control scheme for methanol distillation 20 In progress 12 Solutions for LNG regasification 20 In progress 13 [Wiker Public Welfare Activity] Our company has sodium sulfate as a by-product; we’re looking to install an electrolysis system with a capacity of 10,000 tons. 20 In progress 14 Haichuan Coin Wiker is seeking information on manufacturers selling used chlor-alkali electrolysis cells. 20 In progress 15 I’m looking for operational procedures and technical Q&A related to the skeletal isomerization of butene into isobutene so that I can learn more about it. 20 In progress 16 Materials from the 2015 National Symposium on Ethylene Oxide and Its Downstream Products – Technology & Market 15 In progress 17 Comprehensive explanation of PID legends 15 In progress 18 Seeking process and equipment design for air strippers 10 In progress 19 For Haichuan Coin Wiker’s water-based acrylic resin: The drying process results in stickiness; what solutions are there? 10 In progress 20 [Witkey Public Welfare Activity] The problem of excessive barium sulfate in brine using the barium chloride method 10 In progress 21 Seeking a process design for producing 50,000 tons of dimethyl carbonate per year – a thesis or guidance on the design of the distillation section... Generous rewards offered 10 In progress 22 Partial pressure, viscosity, and surface tension of dimethyl carbonate at temperatures between 100 and 200 degrees Celsius. . . 10 In progress 23 [Haichuan Coin Freelancers] Seeking assistance regarding research experiences related to methanol production from coal. 10 In progress 24 [Haichuan Coin Freelancers] Obtaining a demo version of JK Simmet, software for simulating grinding processes. 10 In progress 25 Selection of valve flow characteristics. 10 In progress 26 Production of bio-oil through high-temperature pyrolysis; seeking further separation and processing techniques! 10 In progress 27 [Haichuan Coin Freelancer] Appendices A, B, C, and D of the Chinese version of EN 12952-5 10 In progress 28 [Haichuan Coin Freelancer] Who has image materials of isothermal compressors? 10 In progress 29 [Haichuan Coin Freelancers] Chinese version of DNV GL’s materials and welding specifications. Who can provide it? 10 In progress 30 [Freelancer Public Welfare Activity] pH of carbonate buffer solutions at different concentrations 10 In progress 31 Introduction to examples of the application of plate heat exchangers with wide flow channels in oil fields 10 In progress 32 Errors caused by installing orifice plates in reverse 8 In progress 33 Haichuan Coin Freelancers: Seeking data related to urea-based compound fertilizers 5 In progress 34 Request for help from Haichuan Coin Freelancers! Manufacturer of DCC cracking agents and heavy oil catalysts! 5 In progress 35 Inquiring about the price of electrodesalination equipment? 5 In progress 36 HaiChuan Coin freelancers are seeking suppliers of membranes for the separation of organic gases. 5 In progress 37 Seeking the electronic version of the proceedings from the 2015 China Petroleum Refining Technology Conference. 5 In progress 38 Is there an electronic version of the technical manual for the SZorb catalytic gasoline adsorption desulfurization unit? 5 In progress 39 Unit control 5 In progress 40 Haichuan Wuke assistance request: Full version of JBT7689-2012 2 In progress 41 Request for a directory of recent coal chemical and petrochemical conferences in 2016 2 In progress 42 Special section for part-time projects and job postings for engineering professionals (updated on July 25) 1 In progress 43 Haichuan Wuke’s major “public welfare” event is now in full swing! 1 In progress 44 Freelancer bounty: Seeking help for glue filtration equipment! Hope manufacturers can provide good filtration equipment! 50 Completed. 45 What is the current status of the localization and operating conditions of the three major pieces of equipment in China’s ethylene plants? 20 Completed. 46 HaiChuan Coin freelancers: I would like to ask all the experts—what exactly is the concept of the ‘P’ value in PID control? 20 Completed. 47 HaiChuan Coin freelancers: Mature technology for mixed butyl phthalate plasticizers. 20 Completed. 48 Is there anyone who can provide drawings of prefabricated container houses? 15 Completed. 49 I’m looking for a Chinese-language contract template for on-site construction management outsourcing services. 10 Completed. 50 [HaiChuan Coin Freelancers]: CAD design drawings for fixed tube sheets, split double-tube sheet heat exchangers. 10 Completed. 51 HaiChuan Coin freelancers: I need the instruction manual for explosion-proof motors produced in Jiamusi. 10 Completed. 52 [HaiChuan Coin Freelancers]: Urgently needed: The Anhui local standard “Guidelines for Handling Liquefied Petroleum Gas Leaks”. 10 Completed. 53 [HaiChuan Coin Freelancers]: Does anyone have the instruction manuals for the speed control system and barring gear of MAN Turbo steam turbines? 10 Completed. 54 Operating procedures for replacing and purging container equipment prior to catalyst replacement in MTBE production. 10 Completed. 55 Seeking advice from Haichuan Coin freelancers! Magnesium oxide, wet flue gas desulfurization, crystallization issues. 5 Completed. 56 [Haichuan Coin Freelancers] Who can post “Fundamentals and Practices of Mechanical Engineering (Beginner Level)”? 5 Completed. 57 Request for downloading documents from CNKI. 5 Completed. 58 Safety design specifications for caustic soda plants (draft for comments). 1 Completed. 59 This post serves as a tutorial on how to use the Technical Freelancer system! 1 Completed. This post serves as a divider managed by moderators. Posts located above this one are new topic posts or replies; moderators need to carefully review them and perform actions such as “rating, commenting, editing, and marking as read”. In case any violating content is detected—such as spam posts, meaningless posts, or posts containing malicious attacks—moderators should promptly issue warnings or delete such posts. When moderating, please start from the moderation separator. After moderating all posts above this one in sequence, please pin this post. Relevant links: 1. Haichuan forum rules: http://bbs.hcbbs.com/thread-1213640-1-1.html 2. Prohibited content on the forum: http://bbs.hcbbs.com/thread-858040-1-1.html 3. Forum management regulations: http://bbs.hcbbs.com/thread-1223204-1-1.html 4. The Industry section is currently seeking moderators and technical personnel to join (open indefinitely): http://bbs.hcbbs.com/thread-1282486-1-1.html