English — Forum #723 (Page 489/642)

1. Topic on the division of responsibilities for process pipelines (fourth week of October) - HCBBS Forum
2. Inorganic Salt Industry - HCBBS Forum
3. Is it more energy-efficient to use unfiltered air? - HCBBS Forum
4. 【Ethylene Question Bank】The main factors affecting the shutdown of ethylene plants are - HCBBS Forum
5. Daily Report on Alkylated Oil: Selling at reduced prices; no improvement in market atmosphere (20151021) - HCBBS Forum
6. Methanol recovery tower - HCBBS Forum
7. What are the categories of content for quality inspection of tower-type equipment? - HCBBS Forum
8. Detection of iron ion content in air - HCBBS Forum
9. Who knows if the furnace at Linyi Yehua Coking has resumed operation after its major repair? - HCBBS Forum
10. Domestic flow meter manufacturers - HCBBS Forum
11. 【MMA】MMA technology is set for an upgrade, which could benefit MTBE - HCBBS Forum
12. Handling of instrument air failure - HCBBS Forum
13. Problems in opening thick-walled composite panels - HCBBS Forum
14. Maximum design inventory in the preliminary evaluation - HCBBS Forum
15. Why do the crucibles used for SO3 and loss on ignition experiments crack? - HCBBS Forum
16. We are a reforming unit; the amount of catalyst dust has been high in recent days, while all other operations are normal. Please advise us on this issue... - HCBBS Forum
17. The difference between the lower workshop and the upper workshop - HCBBS Forum
18. 【Weekly Question】+9 for correct answers, +2 for participation； Close this post on Sunday - HCBBS Forum
19. Please write down the basic equation for flow rate in a rotameter And explain the relationship between flow rate and rotor height? - HCBBS Forum
20. Safe production - HCBBS Forum
21. I’m asking experts to recommend oxygen analyzers~ Thank you! - HCBBS Forum
22. 【Daily Question】Wastewater Knowledge - 10-22 (Answer +3, Correct Answer +5) - HCBBS Forum
23. Announcement on Administrative Issues Related to the Approval Process for Revoking the Eligibility for Tax Refunds for Ethylene and Aromatic Hydrocarbon Production Enterprises - HCBBS Forum
24. External dimensions of 5000L horizontal storage tank - HCBBS Forum
25. How to analyze the composition of alkylated oils - HCBBS Forum
26. 【Daily Question】Question from Issue 20151022 - HCBBS Forum
27. What is the urban heat island effect? - HCBBS Forum
28. How should a heat exchanger be selected for this operating condition? - HCBBS Forum
29. Which brand is better for total sulfur analyzers? Are there any useful domestic total sulfur analyzers? - HCBBS Forum
30. High-end manufacturer of pulp knife gate valves for the paper industry - HCBBS Forum
31. Let’s work on questions 07-2015 from the First-Class Constructor Examination, related to the \"Laws and Regulations\" section: multiple-choice questions 31-33 - HCBBS Forum
32. Could the Blind Advice Home version organize a series of events? - HCBBS Forum
33. Please provide the calculation process - HCBBS Forum
34. Dioxin content in UOP reformer regeneration gas - HCBBS Forum
35. For cogeneration, with a heating area of 1.2 million square meters, what size of units (two units) and boilers are needed? How is this calculated? - HCBBS Forum
36. Chemical plant - HCBBS Forum
37. 【Petrochemical Zone】Recent Updates on Jobs (Reply +10) - HCBBS Forum
38. SS exceeds the limit, need help - HCBBS Forum
39. The outlet temperature of the waste heat conversion boiler increases - HCBBS Forum
40. Regarding microchannel reactors - HCBBS Forum
41. Help translate - HCBBS Forum
42. Are there any steam compressors with a displacement of less than 1 cubic meter per hour, a pressure of 0.8 megapascals, and a temperature tolerance of around 200 degrees? - HCBBS Forum
43. Inquiries regarding activated carbon steam regeneration equipment - HCBBS Forum
44. Hydrogen peroxide is classified as a Category A liquid; which standard should be referred to in the design of hydrogen peroxide storage tanks? - HCBBS Forum
45. Why are the pumps located on the inside or outside of the pipe tray, depending on whether there are air coolers above it? - HCBBS Forum
46. What is the difference between hydrogen-fired boilers and ordinary boilers? Is a Zach burner better or an Oeko one? - HCBBS Forum
47. Help, waiting online - HCBBS Forum
48. The function of pressure gauges in activated carbon adsorption boxes and spray towers in waste gas treatment - HCBBS Forum
49. Seek Q150/950-60-3.82/450 boiler drawings - HCBBS Forum
50. Briefly describe the overview of the methanol synthesis process? - HCBBS Forum
51. 【Daily Question】Question from the 20151023 issue - HCBBS Forum
52. Methanol Weekly Topic: At what hydrogen-to-carbon ratio in the reactor is methanol production highest? 2015.10.26--11.02 - HCBBS Forum
53. Seeking help in drawing a factory floor plan - HCBBS Forum
54. Storage tank level calculation - HCBBS Forum
55. Issues with globe valves (tapered seal) - HCBBS Forum
56. What other good uses is there for the dry gas from the reforming unit, besides being used as fuel? - HCBBS Forum
57. How to draw a PID diagram for threaded connections at the pump inlet and outlet - HCBBS Forum
58. Acid cleaning of oil pipelines - HCBBS Forum
59. Guidelines for the Standardized Management of Industrial Hazardous Waste Generating Units--7 - HCBBS Forum
60. Blockage of the tubes in the tube side of the raw gas preheater in the conversion system - HCBBS Forum
61. Regarding the flushing scheme and operation steps for the secondary seal of the hot oil pump, as well as what the function of flushing the secondary seal is - HCBBS Forum
62. 【Daily Question】10.24 True or False: Platinum in reforming catalysts promotes the progress of dehydrogenation reactions. (Reply +2 wealth) - HCBBS Forum
63. 【Daily Question】Chemical Engineering Principles 205: Heat Flux (October 17) - HCBBS Forum
64. Weekly topic: 5 Wealth points for those who answer correctly, 2 Wealth points for participation； Question 197 - HCBBS Forum
65. 【Daily Question】Chemical Engineering Principles 209: Heat Exchangers (October 21) - HCBBS Forum
66. Does anyone know anything about ranitidine and cimetidine? - HCBBS Forum
67. What issues need to be considered when a circulating fluidized bed boiler is kept in pressurized hot standby mode? - HCBBS Forum
68. Why are valves that meet American standards more expensive than those that meet Chinese standards? - HCBBS Forum
69. What is fail-safe design? - HCBBS Forum
70. Profits from downstream products of propylene - HCBBS Forum
71. Investigation on the use of steam in urea hydrolysis towers - HCBBS Forum
72. Application of remote IO modules - HCBBS Forum
73. “The Puzzle of the Coal Chemical Industry during the 13th Five-Year Plan Period - HCBBS Forum
74. We are seeking guidance – what category does our company’s situation fall into? - HCBBS Forum
75. Regarding the mode masks and disturbance-free switching of the deltap system - HCBBS Forum
76. It is said that a patch has been released for SW6-2011 V2.0, right? Does anyone here have this patch for download? - HCBBS Forum
77. Questions regarding methane gas separation - HCBBS Forum
78. What is the structure of the rectangular furnace lining below? - HCBBS Forum
79. 【Cracking Question Bank】There is a balance line in the low-pressure and high-pressure sections of each cylinder in the cracking gas compressor; the purpose of this is - HCBBS Forum
80. Can a knife switch replace a gate valve? - HCBBS Forum
81. Design of medium-pressure valve internals - HCBBS Forum
82. What does “three doors and one panel” in a heating furnace refer to? How do the opening sizes of the flue dampers and air valves in a heating furnace affect operation? - HCBBS Forum
83. Severe ash accumulation in the synthesis gas pipeline inside the gasifier - HCBBS Forum
84. What precautions should be taken when sampling gases? - HCBBS Forum
85. Regarding the leakage issue of wafer-type double-disc check valves - HCBBS Forum
86. Weekly topic: 5 Wealth points for correct answers, 2 Wealth points for participation； Question 195 - HCBBS Forum
87. Activated carbon decolorization issue - HCBBS Forum
88. Discussion on coagulation and sedimentation processes - HCBBS Forum
89. Does anyone know about the application of horizontal sedimentation filtration centrifuges in chemical plants? - HCBBS Forum
90. One question per day; those who answer correctly receive 6 wealth points, while participants receive 2 wealth points； Question 341 - HCBBS Forum
91. Information related to light naphtha - HCBBS Forum
92. Measurement problems of the venturi flowmeter - HCBBS Forum
93. Online metal particle temperature monitoring instrument - HCBBS Forum
94. Interlock issues between combustible gases and spray systems - HCBBS Forum
95. I’d like to ask everyone about the materials used in pipelines; those who know, please share. How many specific brands are there for BB, DB, and FBB? - HCBBS Forum
96. Do you have a license for exporting metal powder? - HCBBS Forum
97. Why are preventive measures against spontaneous combustion required when removing pre-hydrogenation catalysts that have been used but not regenerated? How should they be removed? - HCBBS Forum
98. Maintenance and renovation of electrostatic tar collectors - HCBBS Forum
99. Q3 Summary of the Alkylated Oil Market - HCBBS Forum
100. How to optimize the feed position in azeotropic distillation - HCBBS Forum