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This post was last edited by LQ198619 on 2017-5-5 12:32. Q&A for 2017 (compiled for easy reference to past questions). Note: This is a compiled post; those who participated in answering questions should reply in the respective question posts； 【Q&A】March 13, 2017: Question: What is the principle of distillation? http://bbs.hcbbs.com/thread-1761168-1-1.html (Source: Haichuan Network) 【Q&A】March 14, 2017: Question: What are the basic conditions for the distillation process? http://bbs.hcbbs.com/thread-1761455-1-1.html (Source: Haichuan Network) [Q&A] March 15, 2017: What are the safety accessories of pressure vessels? http://bbs.hcbbs.com/thread-1761839-1-1.html (Source: Haichuan Network) [Q&A] March 16, 2017: Why cannot a centrifugal pump be started or stopped quickly when starting up – why must the outlet valve be opened slowly? http://bbs.hcbbs.com/thread-1762183-1-1.html (Source: Haichuan Net) [Q&A] March 17, 2017: Question: What is the working principle of a orifice plate flow meter? http://bbs.hcbbs.com/thread-1762517-1-1.html (Source: Haichuan Network) [Q&A] March 18, 2017: What is a fixed-bed reactor? http://bbs.hcbbs.com/forum-227-1.html (Source: Haichuan Network) [Q&A] March 19, 2017: Why shouldn’t liquefied gas containers be filled to capacity? http://bbs.hcbbs.com/thread-1763032-1-1.html (Source: Haichuan Network) [Q&A] March 20, 2017: What are the main aspects of the daily maintenance of tower equipment?http://bbs.hcbbs.com/thread-1763275-1-1.html (Source: Haichuan Network) [Q&A] March 21, 2017: What is the composition and characteristics of liquefied petroleum gas? http://bbs.hcbbs.com/thread-1763504-1-1.html (Source: Haichuan Net) [Q&A] March 22, 2017: Question: The physical and chemical properties of methanol. http://bbs.hcbbs.com/thread-1763905-1-1.html (Source: Haichuan Network) [Q&A] March 23, 2017: What are the methods for removing scale from heat exchangers?
http://bbs.hcbbs.com/thread-1764206-1-1.html (Source: Haichuan Network) [Q&A] March 24, 2017: Explanation of terms: Saturated vapor pressure
http://bbs.hcbbs.com/thread-1764518-1-1.html (Source: Haichuan Network) [Q&A] March 25, 2017: What is the difference between fractional distillation and rectification? http://bbs.hcbbs.com/thread-1764860-1-1.html (Source: Haichuan Net) [Q&A] March 26, 2017: Question: What is the difference between fractional distillation and distillation? http://bbs.hcbbs.com/thread-1765104-1-1.html (Source: Haichuan Net) [Q&A] March 27, 2017: Question: How to put a heat exchanger into use? http://bbs.hcbbs.com/thread-1765403-1-1.html (Source: Haichuan Net) [Q&A] March 28, 2017: Question: What are the physiological effects of MTBE? http://bbs.hcbbs.com/thread-1765709-1-1.html (Source: Haichuan Network) [Q&A] March 29, 2017 Question: What are the principles and purposes of aromatic isomerization? http://bbs.hcbbs.com/thread-1765960-1-1.html (Source: Haichuan Net) [Q&A] March 30, 2017: Question: What is the function of hydrogen in heterogenization? http://bbs.hcbbs.com/thread-1766279-1-1.html (Source: Haichuan Net) [Q&A] March 31, 2017: Question: What is the principle of \"four no-lets-go\"? http://bbs.hcbbs.com/thread-1766593-1-1.html (Source: Haichuan Net) [Q&A] April 1, 2017: Question: How to sample toxic gases? http://bbs.hcbbs.com/thread-1766893-1-1.html (Source: Haichuan Net) [Q&A] April 2, 2017: Question: What pre-treatment processes are required for heterogeneous fresh catalysts before use? Why? http://bbs.hcbbs.com/thread-1767115-1-1.html (Source: Haichuan Net) [Q&A] April 3, 2017: Explanation of terms – Aromatic hydrocarbon dealkylation http://bbs.hcbbs.com/thread-1767286-1-1.html (Source: Haichuan Net) [Q&A] April 4, 2017: Question: What are the hazards of liquefied gas? http://bbs.hcbbs.com/thread-1767437-1-1.html (Source: Haichuan Net) [Q&A] April 5, 2017: Question: What is the principle of separation in an MTBE azeotropic distillation column? http://bbs.hcbbs.com/thread-1767607-1-1.html (Source: Haichuan Net) [Q&A] April 6, 2017: Question: What is the purpose of steam purging during startup? http://bbs.hcbbs.com/thread-1767893-1-1.html (Source: Haichuan Net) [Q&A] April 7, 2017: Explanation of terms – Hydrogenation disruption. http://bbs.hcbbs.com/thread-1768218-1-1.html (Source: Haichuan Net) [Q&A] April 8, 2017: Question: What measures should be taken in the event of a large-scale leak of liquefied petroleum gas? http://bbs.hcbbs.com/thread-1768573-1-1.html (Source: Haichuan Net) [Q&A] April 9, 2017: Explanation of terms – Catalytic dehydrogenation. http://bbs.hcbbs.com/thread-1768793-1-1.html (Source: Haichuan Net) [Q&A] April 10, 2017: Question: What is distillation? http://bbs.hcbbs.com/thread-1768957-1-1.html (Source: Haichuan Net) [Q&A] April 11, 2017: What is MTBE? http://bbs.hcbbs.com/thread-1769228-1-1.html (Source: Haichuan Net) [Q&A] April 12, 2017: Explain the principle of orifice flow meters http://bbs.hcbbs.com/thread-1769571-1-1.html (Source: Haichuan Net) [Q&A] April 13, 2017: Question: What is the separation principle of the MTBE azeotropic distillation tower? http://bbs.hcbbs.com/thread-1770001-1-1.html (Source: Haichuan Net) [Q&A] April 14, 2017: Question: What is the purpose of water flushing in the equipment? http://bbs.hcbbs.com/thread-1770312-1-1.html (Source: Haichuan Net) [Q&A] April 15, 2017: Question: What is the \"air locking\" phenomenon in centrifugal pumps? http://bbs.hcbbs.com/thread-1770612-1-1.html(Source: Haichuan Net) [Q&A] April 16, 2017 Question: What are the key points for maintaining a centrifugal pump during operation? http://bbs.hcbbs.com/thread-1770613-1-1.html (Source: Haichuan Net) [Q&A] April 17, 2017: Question: Briefly explain the principle behind the production process for gas-phase operations http://bbs.hcbbs.com/thread-1771004-1-1.html (Source: Haichuan Network) [Q&A] April 18, 2017: What is saturated vapor pressure? http://bbs.hcbbs.com/thread-1771331-1-1.html (Source: Haichuan Chemical Forum) [Q&A] April 19, 2017: What does vacuum degree mean? http://bbs.hcbbs.com/thread-1771557-1-1.html (Source: Haichuan Chemical Industry Forum) [Q&A] April 20, 2017: Question: What is the relationship between the flow rate and head of a centrifugal pump? http://bbs.hcbbs.com/thread-1771962-1-1.html (Source: Haichuan Chemical Industry Forum) [Q&A] April 21, 2017: What are the characteristics of liquefied gas combustion? http://bbs.hcbbs.com/thread-1772310-1-1.html (Source: Haichuan Chemical Industry Forum) [Q&A] April 22, 2017: What is the working principle of a centrifugal pump? http://bbs.hcbbs.com/thread-1772686-1-1.html(Source: Haichuan Chemical Industry Forum) [Q&A] April 23, 2017 Question: What are the characteristics of shielded pumps? http://bbs.hcbbs.com/thread-1772902-1-1.html(Source: Haichuan Chemical Industry Forum) [Q&A] April 24, 2017: Question: What does the hydrogen-to-oil ratio mean in isomerization reactions? http://bbs.hcbbs.com/thread-1773097-1-1.html (Source: Haichuan Chemical Industry Forum) [Q&A] April 25, 2017: Question: What are the main process variables in isomerization reactions? http://bbs.hcbbs.com/thread-1773355-1-1.html (Source: Haichuan Chemical Industry Forum) [Q&A] April 26, 2017: Question: What is the function of the clay tower? http://bbs.hcbbs.com/thread-1773665-1-1.html (Source: Haichuan Chemical Industry Forum) [Q&A] April 27, 2017: Question: What is the function of the ceramic sand at the bottom of the white clay tower? http://bbs.hcbbs.com/thread-1773666-1-1.html(Source: Haichuan Chemical Industry Forum) [Q&A] April 28, 2017: Question: What are the factors that affect heat transfer? http://bbs.hcbbs.com/thread-1774213-1-1.html(Source: Haichuan Chemical Forum) [Q&A] April 29, 2017 Question: What is drying? http://bbs.hcbbs.com/thread-1774535-1-1.html (Source: Haichuan Chemical Industry Forum) [Q&A] April 30, 2017: Question: During normal production, what factors affect the isomerization reaction? (Multiple-choice question) http://bbs.hcbbs.com/thread-1774677-1-1.html (Source: Haichuan Chemical Industry Forum)
The basic principle of distillation is a unit operation in which a liquid mixture is partially vaporized, and separation is achieved by taking advantage of the different volatilities of its various components. Distillation can be classified according to its operation methods into: simple distillation, flash distillation, rectification, and special rectification, etc.
Utilizing the fact that each component in a mixture has a different vapor pressure (i.e., different volatility) at a given temperature, the liquid mixture is heated. Through multiple cycles of partial vaporization and partial condensation, mass and heat transfer between the gas and liquid phases occurs within the distillation column. As a result, the proportion of the more volatile component in the gas phase becomes significantly higher than that in the liquid phase, thereby achieving the separation of this component from the mixture.
Utilizing the fact that each component in a mixture has a different vapor pressure (i.e., different volatility) at a given temperature, the liquid mixture is heated. Through multiple cycles of partial vaporization and partial condensation, mass and heat transfer between the gas and liquid phases occurs within the distillation column. As a result, the proportion of the more volatile component in the gas phase becomes significantly higher than that in the liquid phase, thereby achieving the separation of this component from the mixture.
Utilizing the fact that each component in a mixture has a different vapor pressure (i.e., different volatility) at a given temperature, the liquid mixture is heated. Through multiple cycles of partial vaporization and partial condensation, mass and heat transfer between the gas and liquid phases occurs within the distillation column. As a result, the proportion of the more volatile component in the gas phase becomes significantly higher than that in the liquid phase, thereby achieving the separation of this component from the mixture.
Distillation is a process in which, taking advantage of the different volatilities of components in a liquid mixture under certain pressure, the components are completely separated through multiple cycles of partial vaporization and partial condensation within a column.
The azeotropic distillation column is used to separate MTBE from C4 and methanol, as C4 and MTBE form a minimum azeotrope under the feed composition and operating conditions here. In this way, through the separation action of the column, a C4 and methanol mixture is separated at the top of the column, while a qualified MTBE product is obtained at the bottom.
The heat exchanger should first be fed with cold material, and then with hot material
This post was last edited by LQ198619 on 2017-6-5 07:08. Summary of Q&A questions for May – Table of Contents. [Q&A] May 1, 2017: Question: What are the purposes of insulation in chemical processing units? ( ) Multiple-choice question (a reward for using a special skill will be provided for an upgrade) http://bbs.hcbbs.com/thread-1774780-1-1.html (Source: Haichuan Chemical Industry Forum) [Q&A] May 2, 2017: Question: Into which categories can pumps be classified based on their working principle? http://bbs.hcbbs.com/thread-1774954-1-1.html (Source: Haichuan Chemical Industry Forum) [Q&A] May 3, 2017: Question: Besides meeting the process requirements, what other factors should be taken into account in the design of a distillation tower? ( ) (Multiple-choice question) http://bbs.hcbbs.com/thread-1775364-1-1.html (Source: Haichuan Chemical Engineering Forum) [Q&A] May 4, 2017. Question: What are the main types of plate columns? (Multiple-choice question) http://bbs.hcbbs.com/thread-1775366-1-1.html (Source: Haichuan Chemical Industry Forum) [Q&A] May 5, 2017: Question: What factors are primarily taken into consideration in the operation of a distillation tower? ( ) (Multiple-choice question) http://bbs.hcbbs.com/thread-1775367-1-1.html (Source: Haichuan Chemical Engineering Forum) [Q&A] May 6, 2017. Question: What is a dynamic seal? http://bbs.hcbbs.com/thread-1775368-1-1.html (Source: Haichuan Chemical Engineering Forum) [Q&A] May 7, 2017. Question: What does relative volatility signify? http://bbs.hcbbs.com/thread-1776326-1-1.html (Source: Haichuan Chemical Engineering Forum) [Q&A] May 8, 2017. Question: What is vapor-liquid equilibrium? http://bbs.hcbbs.com/thread-1776325-1-1.html (Source: Haichuan Chemical Forum) [Q&A] May 9, 2017: What should be checked before starting a centrifugal pump? (Multiple-choice question) http://bbs.hcbbs.com/thread-1777009-1-1.html (Source: Haichuan Chemical Forum) [Q&A] May 10, 2017: What are the common types of special distillation processes? http://bbs.hcbbs.com/thread-1777320-1-1.html (Source: Haichuan Chemical Engineering Forum) [Q&A] May 11, 2017. Question: What are the commonly used methods for corrosion investigation? http://bbs.hcbbs.com/thread-1777707-1-1.html (Source: Haichuan Chemical Industry Forum) [Q&A] May 12, 2017: Question: What are the common methods used for investigating corrosion in towers and vessels? http://bbs.hcbbs.com/thread-1777708-1-1.html (Source: Haichuan Chemical Engineering Forum) [Q&A] May 13, 2017. Question: What are the common methods for investigating corrosion in heat exchangers? http://bbs.hcbbs.com/thread-1777709-1-1.html(Source: Haichuan Chemical Industry Forum) [Q&A] May 14, 2017: Question: What are the common methods used for investigating pipe corrosion? http://bbs.hcbbs.com/thread-1777710-1-1.html (Source: Haichuan Chemical Engineering Forum) [Q&A] May 15, 2017. Question: What is stress corrosion cracking? http://bbs.hcbbs.com/thread-1778727-1-1.html (Source: Haichuan Chemical Engineering Forum) [Q&A] May 16, 2017. Question: What is local corrosion? http://bbs.hcbbs.com/thread-1778730-1-1.html (Source: Haichuan Chemical Engineering Forum) [Q&A] May 17, 2017. Question: What is corrosion fatigue? http://bbs.hcbbs.com/thread-1778728-1-1.html(Source: Haichuan Chemical Industry Forum) [Q&A] May 18, 2017: Question: What are the consequences of scaling in heat exchange equipment? http://bbs.hcbbs.com/thread-1780487-1-1.html (Source: Haichuan Chemical Engineering Forum) [Q&A] May 19, 2017: What is the working principle of an orifice plate flowmeter? http://bbs.hcbbs.com/thread-1780488-1-1.html(Source: Haichuan Chemical Industry Forum) [Q&A] May 20, 2017 Question: What is critical pressure? http://bbs.hcbbs.com/thread-1781184-1-1.html(Source: Haichuan Chemical Industry Forum) [Q&A] May 22, 2017 Question: What is cavitation? http://bbs.hcbbs.com/thread-1781186-1-1.html (Source: Haichuan Chemical Forum) [Q&A] May 23, 2017: Question: What is mist entrainment? What harm does it do to operations? http://bbs.hcbbs.com/thread-1781187-1-1.html (Source: Haichuan Chemical Industry Forum) [Q&A] May 24, 2017: What is gas entrapment? http://bbs.hcbbs.com/forum.php?mod=viewthread&tid=1782350 (Source: Haichuan Chemical Industry Forum Website) [Q&A] May 25, 2017: What conditions must be met at a site where welding work is to be carried out in order to obtain a welding permit? http://bbs.hcbbs.com/forum.php?mod=viewthread&tid=1782729 (Source: Haichuan Chemical Industry Forum) [Q&A] May 26, 2017: Briefly describe the principle and usage of dry powder fire extinguishers http://bbs.hcbbs.com/forum.php?mod=viewthread&tid=1782730 (Source: Haichuan Chemical Industry Forum) [Q&A] May 27, 2017: What is the concept of compressor surge? http://bbs.hcbbs.com/forum.php?mod=viewthread&tid=1782731 (Source: Haichuan Chemical Industry Forum) [Q&A] May 28, 2017: Question: What is heat transfer? How many forms of heat transfer are there? http://bbs.hcbbs.com/forum.php?mod=viewthread&tid=1783751 (Source: Haichuan Chemical Engineering Forum) [Q&A] May 29, 2017 Question: What is vapor-liquid equilibrium? http://bbs.hcbbs.com/forum.php?mod=viewthread&tid=1783752 (Source: Haichuan Chemical Engineering Forum) [Q&A] May 30, 2017 Question: What is radiative heat transfer? http://bbs.hcbbs.com/forum.php?mod=viewthread&tid=1783753 (Source: Haichuan Chemical Industry Forum) [Q&A] May 31, 2017: Question: What is the thermal balance of a distillation tower? http://bbs.hcbbs.com/forum.php?mod=viewthread&tid=1783754 (Source: Haichuan Chemical Engineering Forum)
This post was last edited by LQ198619 on 2017-6-30 20:18. Summary of Q&A questions for June. Table of contents: [Q&A] June 1, 2017 – How should ordinary centrifugal pumps be kept in standby mode? http://bbs.hcbbs.com/forum.php?mod=viewthread&tid=1784486 (Source: Haichuan Chemical Industry Forum) [Q&A] June 2, 2017 – What are the principles for selecting the materials used in the tube side and shell side of heat exchangers (tubular heat exchangers)? http://bbs.hcbbs.com/forum.php?mod=viewthread&tid=1784487 (Source: Haichuan Chemical Industry Forum) [Q&A] June 3, 2017 – What are sensible heat and latent heat? http://bbs.hcbbs.com/forum.php?mod=viewthread&tid=1784488 (Source: Haichuan Chemical Industry Forum) [Q&A] June 4, 2017: What is the bubble point? Dew point? http://bbs.hcbbs.com/forum.php?mod=viewthread&tid=1784489 (Source: Haichuan Chemical Engineering Forum) [Q&A] June 5, 2017: What is a physical explosion? http://bbs.hcbbs.com/forum.php?mod=viewthread&tid=1785731 (Source: Haichuan Chemical Industry Forum) [Q&A] June 6, 2017 http://bbs.hcbbs.com/thread-1785732-1-1.html (Source: Haichuan Chemical Industry Forum) [Q&A] June 7, 2017 http://bbs.hcbbs.com/thread-1785733-1-1.html (Source: Haichuan Chemical Industry Forum) [Q&A] June 8, 2017 http://bbs.hcbbs.com/thread-1785734-1-1.html (Source: Haichuan Chemical Industry Forum) [Q&A] June 9, 2017 http://bbs.hcbbs.com/thread-1789644-1-1.html (Source: Haichuan Chemical Industry Forum) [Q&A] June 10, 2017 http://bbs.hcbbs.com/thread-1789645-1-1.html (Source: Haichuan Chemical Industry Forum) [Q&A] June 11, 2017 http://bbs.hcbbs.com/thread-1789647-1-1.html (Source: Haichuan Chemical Industry Forum) [Q&A] June 12, 2017 http://bbs.hcbbs.com/thread-1789648-1-1.html (Source: Haichuan Chemical Industry Forum) [Q&A] June 13, 2017 http://bbs.hcbbs.com/thread-1797337-1-1.html (Source: Haichuan Chemical Industry Forum) [Q&A] June 14, 2017 http://bbs.hcbbs.com/thread-1797338-1-1.html (Source: Haichuan Chemical Industry Forum) [Q&A] June 15, 2017 http://bbs.hcbbs.com/thread-1797339-1-1.html (Source: Haichuan Chemical Industry Forum) [Q&A] June 16, 2017 http://bbs.hcbbs.com/thread-1797341-1-1.html (Source: Haichuan Chemical Industry Forum) [Q&A] June 17, 2017 http://bbs.hcbbs.com/thread-1798500-1-1.html (Source: Haichuan Chemical Industry Forum) [Q&A] June 18, 2017 http://bbs.hcbbs.com/thread-1798501-1-1.html (Source: Haichuan Chemical Industry Forum) [Q&A] June 19, 2017 http://bbs.hcbbs.com/thread-1798502-1-1.html (Source: Haichuan Chemical Industry Forum) [Q&A] June 20, 2017 http://bbs.hcbbs.com/thread-1799135-1-1.html (Source: Haichuan Chemical Industry Forum) [Q&A] June 21, 2017 http://bbs.hcbbs.com/thread-1799136-1-1.html (Source: Haichuan Chemical Industry Forum) [Q&A] June 22, 2017 http://bbs.hcbbs.com/thread-1799137-1-1.html (Source: Haichuan Chemical Industry Forum) [Q&A] June 23, 2017 http://bbs.hcbbs.com/thread-1799138-1-1.html (Source: Haichuan Chemical Industry Forum) [Q&A] June 24, 2017 http://bbs.hcbbs.com/thread-1798499-1-1.html (Source: Haichuan Chemical Industry Forum) [Q&A] June 25, 2017 http://bbs.hcbbs.com/thread-1800380-1-1.html (Source: Haichuan Chemical Industry Forum) [Q&A] June 26, 2017 http://bbs.hcbbs.com/thread-1800379-1-1.html (Source: Haichuan Chemical Industry Forum) [Q&A] June 27, 2017 http://bbs.hcbbs.com/thread-1800378-1-1.html (Source: Haichuan Chemical Industry Forum) [Q&A] June 28, 2017 http://bbs.hcbbs.com/thread-1800377-1-1.html (Source: Haichuan Chemical Industry Forum) [Q&A] June 29, 2017 http://bbs.hcbbs.com/thread-1801292-1-1.html (Source: Haichuan Chemical Industry Forum) [Q&A] June 30, 2017 http://bbs.hcbbs.com/thread-1801293-1-1.html (Source: Haichuan Chemical Industry Forum)
This post was last edited by LQ198619 on July 31, 2017, at 00:16. Q&A for July [Q&A] July 1, 2017: http://bbs.hcbbs.com/thread-1801294-1-1.html (Source: Haichuan Chemical Engineering Forum) [Q&A] July 2, 2017: http://bbs.hcbbs.com/thread-1801295-1-1.html (Source: Haichuan Chemical Engineering Forum) [Q&A] July 3, 2017: http://bbs.hcbbs.com/thread-1802201-1-1.html (Source: Haichuan Chemical Engineering Forum) [Q&A] July 4, 2017: http://bbs.hcbbs.com/thread-1802202-1-1.html (Source: Haichuan Chemical Engineering Forum) [Q&A] July 5, 2017: http://bbs.hcbbs.com/thread-1802203-1-1.html (Source: Haichuan Chemical Engineering Forum) [Q&A] July 6, 2017: http://bbs.hcbbs.com/thread-1802204-1-1.html (Source: Haichuan Chemical Engineering Forum) [Q&A] July 7, 2017: http://bbs.hcbbs.com/thread-1803145-1-1.html (Source: Haichuan Chemical Engineering Forum) [Q&A] July 8, 2017: http://bbs.hcbbs.com/thread-1803146-1-1.html (Source: Haichuan Chemical Engineering Forum) [Q&A] July 9, 2017: http://bbs.hcbbs.com/thread-1803147-1-1.html (Source: Haichuan Chemical Engineering Forum) [Q&A] July 10, 2017: http://bbs.hcbbs.com/thread-1803148-1-1.html (Source: Haichuan Chemical Engineering Forum) [Q&A] July 11, 2017: http://bbs.hcbbs.com/thread-1804332-1-1.html (Source: Haichuan Chemical Engineering Forum) [Q&A] July 12, 2017: http://bbs.hcbbs.com/thread-1804333-1-1.html (Source: Haichuan Chemical Engineering Forum) [Q&A] July 13, 2017: http://bbs.hcbbs.com/thread-1804334-1-1.html (Source: Haichuan Chemical Engineering Forum) [Q&A] July 14, 2017: http://bbs.hcbbs.com/thread-1804335-1-1.html (Source: Haichuan Chemical Engineering Forum) [Q&A] July 15, 2017: http://bbs.hcbbs.com/thread-1805547-1-1.html (Source: Haichuan Chemical Engineering Forum) [Q&A] July 16, 2017: http://bbs.hcbbs.com/thread-1805548-1-1.html (Source: Haichuan Chemical Engineering Forum) [Q&A] July 17, 2017: http://bbs.hcbbs.com/thread-1805549-1-1.html (Source: Haichuan Chemical Engineering Forum) [Q&A] July 18, 2017: http://bbs.hcbbs.com/thread-1805550-1-1.html (Source: Haichuan Chemical Engineering Forum) [Q&A] July 19, 2017: http://bbs.hcbbs.com/thread-1806525-1-1.html (Source: Haichuan Chemical Engineering Forum) [Q&A] July 20, 2017: http://bbs.hcbbs.com/thread-1806526-1-1.html (Source: Haichuan Chemical Engineering Forum) [Q&A] July 21, 2017: http://bbs.hcbbs.com/thread-1806527-1-1.html (Source: Haichuan Chemical Engineering Forum) [Q&A] July 22, 2017: http://bbs.hcbbs.com/thread-1806528-1-1.html (Source: Haichuan Chemical Engineering Forum) [Q&A] July 23, 2017: http://bbs.hcbbs.com/thread-1807616-1-1.html (Source: Haichuan Chemical Engineering Forum) [Q&A] July 24, 2017: http://bbs.hcbbs.com/thread-1807615-1-1.html (Source: Haichuan Chemical Engineering Forum) [Q&A] July 25, 2017: http://bbs.hcbbs.com/thread-1807614-1-1.html (Source: Haichuan Chemical Engineering Forum) [Q&A] July 26, 2017: http://bbs.hcbbs.com/thread-1807613-1-1.html (Source: Haichuan Chemical Engineering Forum) [Q&A] July 27, 2017: http://bbs.hcbbs.com/thread-1808583-1-1.html (Source: Haichuan Chemical Engineering Forum) [Q&A] July 28, 2017: http://bbs.hcbbs.com/thread-1808582-1-1.html (Source: Haichuan Chemical Engineering Forum) [Q&A] July 29, 2017: http://bbs.hcbbs.com/thread-1808581-1-1.html (Source: Haichuan Chemical Engineering Forum) [Q&A] July 30, 2017: http://bbs.hcbbs.com/thread-1808580-1-1.html (Source: Haichuan Chemical Engineering Forum) [Q&A] July 31, 2017: http://bbs.hcbbs.com/thread-1810362-1-1.html (Source: Haichuan Chemical Engineering Forum)