English — Forum #723 (Page 424/642)

1. 【Picture of the Day】12.15: Take a look – what is in this picture? - HCBBS Forum
2. 【Daily Question】Question from Issue 20151207 - HCBBS Forum
3. Integrated denitration and desulfurization process scheme using ozone + hydrogen peroxide combination - HCBBS Forum
4. Explosion-proof safety measures for the condensation evaporator in air separation equipment - HCBBS Forum
5. Reasons for severe corrosion in low-profile water heat exchangers and treatment measures - HCBBS Forum
6. I would like to know what requirements are needed to work in chemical cleaning - HCBBS Forum
7. 【Daily Question】Question from 20151209 - HCBBS Forum
8. 【Daily Question】Question from Issue 20151207 - HCBBS Forum
9. What methods can be used to remove non-methane hydrocarbons? - HCBBS Forum
10. Is your company’s instrumentation department responsible for the maintenance of video surveillance systems in the factory? - HCBBS Forum
11. Weekly topic: 5 Wealth points for those who answer correctly, 2 Wealth points for participation； Question 235 - HCBBS Forum
12. 【Weekly Topic】Key points in the design and manufacturing of floating-head heat exchangers: - HCBBS Forum
13. 【Daily Question】True or False: The common sealing methods for centrifugal pumps are mechanical seal and packing seal. - HCBBS Forum
14. Issues related to pressure testing and leak checking after the installation of the concentrated sulfuric acid tank - HCBBS Forum
15. I met an amazing boyfriend - HCBBS Forum
16. 【Daily Question】True or False: 12/9/2015 If a pressure vessel has already undergone a pneumatic test, it is not necessary to conduct a leak test. ... - HCBBS Forum
17. Which teacher is familiar with the phthalic anhydride industry? Do they know where heat transfer oil is used in the phthalic anhydride production process? Why use lava? - HCBBS Forum
18. For equipment lined with PTFE (tetrafluoroethylene), if part of the fluorine lining is damaged, how can it be repaired? - HCBBS Forum
19. Application ranges of temperature transmitters and thermal resistors - HCBBS Forum
20. (Basic knowledge) What are particle entrainment and stripping phenomena in fluidized beds? - HCBBS Forum
21. 【Daily Question No. 76】December 15, 2015: +2 wealth for participation, plus another +3 to +8 wealth for correct answers - HCBBS Forum
22. All the problems with flange differential pressure level gauges? - HCBBS Forum
23. Under what conditions do chemical processing equipment and pipelines experience polarization? Does polarization accelerate corrosion? - HCBBS Forum
24. Regarding the turbine cruise speed - HCBBS Forum
25. 【Daily Question】Reissue 12.9 Multiple-choice question: The safety valve that is widely used in the production of petrochemical plants is ( ).[ - HCBBS Forum
26. An increase in bubbles in the wastewater on a large scale? - HCBBS Forum
27. How much longer before outdated production capacity is phased out? - HCBBS Forum
28. 20151216 One question per day - HCBBS Forum
29. Looking for a part-time job in instrument automation while I’m free - HCBBS Forum
30. Dedicated to children who have never seen heavy snow - HCBBS Forum
31. The formation of swirl flow in a cyclone separator - HCBBS Forum
32. Total rotor runout of Shengyu centrifugal compressors - HCBBS Forum
33. Why does the drum-type compound fertilizer granulator produce rice-like grains? - HCBBS Forum
34. Huaxing’s 4 billion cubic meters of coal-to-natural gas project has passed the preliminary review for water resource assessment - HCBBS Forum
35. Advantages and disadvantages of the reinforcement pattern for the flat cover of storage tanks - HCBBS Forum
36. The validity period of a marriage certificate is 7 years; after that, it becomes an illegal cohabitation relationship. What’s your opinion on this? - HCBBS Forum
37. 【Daily Question】 January 26th Why is the flame from the burner too intense? ? ? ? - HCBBS Forum
38. Have you sought help with the issue of superheated steam containing water? - HCBBS Forum
39. Seek solutions to cavitation in slurry pumps - HCBBS Forum
40. Effects of the distribution of mid-stage reflux in atmospheric distillation and changes in reboiler temperature - HCBBS Forum
41. Optical path calibration method for online Raman spectroscopy analyzer - HCBBS Forum
42. What to do with the steam trap during steam pipeline purging - HCBBS Forum
43. Has everyone managed to get tickets to go home for the New Year? - HCBBS Forum
44. Regarding the issue of removing old equipment. - HCBBS Forum
45. Spherical tanks: Discussion on the design parameters of spherical tanks - HCBBS Forum
46. Safety valve calculation - HCBBS Forum
47. Aspen video tutorials - HCBBS Forum
48. What does the maximum static pressure of a differential pressure gauge mean? - HCBBS Forum
49. CASS process sludge cultivation - HCBBS Forum
50. 【Daily Question】Question from Issue 20151208 - HCBBS Forum
51. What principles should guide the design of the water seal tank on top of large storage tanks? - HCBBS Forum
52. 【Daily Question】Reissued on 12.16 – Multiple-choice question: What is a disposable release device? - HCBBS Forum
53. Thoughts on the reform of the total pollutant emission control system during the 13th Five-Year Plan period - HCBBS Forum
54. Methanol Weekly Topic: What should be the water content control for pure methanol? 2015.12.07--12.13 - HCBBS Forum
55. 【Daily Question】12.13 True or False: A high content of alkanes in the raw materials results in a lower octane rating of the gasoline produced - HCBBS Forum
56. Layout plan of coal-to-methanol plant - HCBBS Forum
57. Aerobic/semi-aerobic single-stage autotrophic nitrogen removal process for wastewater with high ammonia nitrogen levels (average ammonia nitrogen removal rate of 94%) - HCBBS Forum
58. 【Basic Knowledge 13】What is local corrosion? Difference from general corrosion (quiz with prizes) - HCBBS Forum
59. 【Daily Question】Question from Issue 20151211 - HCBBS Forum
60. What do the letters in MFZ-class and ABC-class fire extinguishers represent? - HCBBS Forum
61. Electrical Version Quiz Activity (True/False) at the End of 2015 - HCBBS Forum
62. Design data for the transformation section - HCBBS Forum
63. Video on how to use a fire hydrant - HCBBS Forum
64. How is the phthalic anhydride market doing? - HCBBS Forum
65. Issues regarding the sulfidation and passivation of hydrogenation catalysts for sulfur-containing exhaust gases - HCBBS Forum
66. Condensate water issues after steam temperature reduction - HCBBS Forum
67. 【Daily Question】December 11, 2015: Participation +2 Wealth； +3 to 8 wealth for correct answers - HCBBS Forum
68. 【Daily Question】December 15, 2015: Participation +2 Wealth； +3 to 8 wealth for correct answers - HCBBS Forum
69. 【Picture of the Day】12.14 What device is shown in this picture? - HCBBS Forum
70. Can an inverter-driven motor operate for a long time at 60Hz? - HCBBS Forum
71. Click \"Remind\" in the notification; after entering the post, it’s not possible to go to the corresponding floor - HCBBS Forum
72. Regarding the calculation of control valves - HCBBS Forum
73. With the oil market in such a poor state, is there still a future for recycled oil? - HCBBS Forum
74. Why can’t I still download the forum materials after registering an account? - HCBBS Forum
75. 【Daily Question】12.8 Supplementary: Multiple-choice question. The most widely used pressure relief valve is ( ) - HCBBS Forum
76. 【Daily Question】December 7, 2015: Participation +2 Wealth； +3 to 8 wealth for correct answers - HCBBS Forum
77. I hope the experts here can help and tell me what the problem is - HCBBS Forum
78. Sudden value jumps in ultrasonic flowmeters when flow is stopped - HCBBS Forum
79. A daily question set for PVC along with the correct answers, thank you - HCBBS Forum
80. Inspection ratio for buried pipelines in oily media - HCBBS Forum
81. Huanyu Engineering signs EPC contract for clean energy project in Texas, USA - HCBBS Forum
82. 【Daily Question No. 70】December 07, 2015: +2 wealth for participation, +3 to +8 wealth for correct answers - HCBBS Forum
83. 【Daily Question】Question from Issue 20151214 - HCBBS Forum
84. How to calculate the flange thickness of equipment at atmospheric pressure - HCBBS Forum
85. List of equipment, differences and connections between equipment registers and equipment files - HCBBS Forum
86. Two problems with liquefied natural gas cylinders for trucks? - HCBBS Forum
87. How can the development of coal chemical industry overcome the challenges in wastewater treatment? - HCBBS Forum
88. 【Daily Question】12.13 True or False: What does the reflux ratio refer to? - HCBBS Forum
89. total head - HCBBS Forum
90. 20151214 One question per day - HCBBS Forum
91. Selection of first-level constructor textbooks. . Simplified version or non-simplified version? - HCBBS Forum
92. Why use two type of level gauges (double-flange and radio frequency admittance) at the same time? - HCBBS Forum
93. Control of reactor condensate volume in Unipol polypropylene plant? ? ? - HCBBS Forum
94. 【Daily Question】2015.12.14 Metal temperature of the shell-side cylinder and metal temperature of the heat exchange tubes (top 60 participants + 2 prizes) - HCBBS Forum
95. 【Basic Knowledge 8】Cathodic depolarization reactions that occur preferentially in neutral media (prize quiz) - HCBBS Forum
96. Safety - HCBBS Forum
97. What are the reasons for inaccurate bottom pressure in the absorption tower? - HCBBS Forum
98. Environmental Protection Daily Quiz 12.13: Participate for prizes; 3 correct answers and another 3 prizes will be given - HCBBS Forum
99. Could an expert please explain why alkanes are more prone to spontaneous combustion than aromatics? Thank you - HCBBS Forum
100. 【Daily Question】Chemical Engineering Principles 260: Drying (December 11) - HCBBS Forum