English — Forum #723 (Page 632/642)

1. Excessive nitrogen stripping can lead to the release of hydrogen sulfide; will this result in excessive sulfur levels in the exhaust gases? - HCBBS Forum
2. Which absorbs more heat per unit of time: water at 100 degrees boiling or water at 50 degrees boiling (under negative pressure)? - HCBBS Forum
3. WHY?? - HCBBS Forum
4. Heating furnace tube issues - HCBBS Forum
5. The schematic diagram of the upper structure of the building? - HCBBS Forum
6. Packing tower pressure drop - HCBBS Forum
7. Case studies of corrosion repair for chemical processing equipment - HCBBS Forum
8. 【Weekly Topic】-004-Is it unprofessional to work in water treatment? - HCBBS Forum
9. Demand for talent in coal gasification - HCBBS Forum
10. Manufacturing containers from 825 nickel-based alloy steel plates: Design, manufacturing, and inspection considerations - HCBBS Forum
11. A solid is obtained after evaporation; when is a spray drying tower used? - HCBBS Forum
12. I need help in obtaining information on the hydroprocessing process for coal tar, as well as some introductions to such processes. Thank you very much - HCBBS Forum
13. Internal force analysis of curved pipes - HCBBS Forum
14. How is calcium hydroxide used to neutralize waste acid to produce calcium sulfate dihydrate? - HCBBS Forum
15. Who is familiar with the automation upgrades in chlorosulfonic acid production? - HCBBS Forum
16. Are there any requirements for the cooling water pipeline design of screw chiller units? - HCBBS Forum
17. Questions about ammonia valves - HCBBS Forum
18. Steel plate SMO254 - HCBBS Forum
19. What are the responsibilities of vocational instructors in chemical plants? - HCBBS Forum
20. Questions regarding the acceptance of end caps - HCBBS Forum
21. Which engineering companies in Guangzhou are quite well-known? It seems that there are few such companies established in Guangdong! - HCBBS Forum
22. The issue of the catalytic charring ratio - HCBBS Forum
23. Can pickling and passivation cause stainless steel to thin? - HCBBS Forum
24. What is the oil-free processing procedure for carbon steel valves? - HCBBS Forum
25. Operating temperature of PTFE flange gaskets - HCBBS Forum
26. Is there an effective way to remove odors using the natural gas odorizer THT? - HCBBS Forum
27. What are the main uses of tetrafluoroethane β-sulfolactone and perfluoropropyl vinyl ether? - HCBBS Forum
28. Reciprocating pump outlet safety valve - HCBBS Forum
29. 2014 Real Knowledge Questions 55 - HCBBS Forum
30. Urgently need Japanese standards HPIS C 103 guidelines for the design of ultra-high pressure cylindrical vessels - HCBBS Forum
31. I need to go home and rest. . . - HCBBS Forum
32. 【Daily Question】6.3 Low-Temperature Structures - HCBBS Forum
33. Feasibility of installing a frequency converter on vacuum units - HCBBS Forum
34. The composition of raw gas varies significantly - HCBBS Forum
35. Coal chemical industry waste brine, separation of sodium sulfate and sodium chloride - HCBBS Forum
36. Internal leakage in the safety valve bypass valve - HCBBS Forum
37. The steel plate has excessive scale - HCBBS Forum
38. Wax oil hydroprocessing, thermal cracking – challenges with level measurement instruments - HCBBS Forum
39. What equipment is generally included in a cabinet room? What conditions need to be submitted to the civil engineering department? - HCBBS Forum
40. Can one take the Chemical Engineering Qualification Exam and the First-Class Constructor Exam with different educational qualifications? - HCBBS Forum
41. Honeywell PKS training video - HCBBS Forum
42. Execution standards for stainless steel sections - HCBBS Forum
43. Do the instruments of the unit shafting need to be calibrated before installation? - HCBBS Forum
44. The pH value of the boiler feed water is too low - HCBBS Forum
45. Questions about centrifuges - HCBBS Forum
46. Size requirements for the test plates - HCBBS Forum
47. Why is the dashboard section so active? - HCBBS Forum
48. Does the deviation in self-control have a direction? - HCBBS Forum
49. Acrylic acid production by the acetic acid method - HCBBS Forum
50. Power supply issues for high-power electric control valves? - HCBBS Forum
51. Confused; I don’t want to do design work anymore. What can I do? - HCBBS Forum
52. Daily Question June 6, 2015 (Safe Communication): 3 wealth points for replies, 5 wealth points for correct answers; participation comes with rewards - HCBBS Forum
53. Physical image of plate-shell heat exchanger - HCBBS Forum
54. Who has a coating that is hydrophilic, corrosion-resistant, solvent-resistant, and capable of withstanding 150°C? - HCBBS Forum
55. Calculation of the outlet temperature of a safety valve - HCBBS Forum
56. What is the largest scale of hydrocracking at Sinopec? - HCBBS Forum
57. Is this an advertisement for the obscure welding profession? - HCBBS Forum
58. May I ask where to find the low calorific value of coal for simulating coal combustion? - HCBBS Forum
59. Wooden Discussion on Instruments (13) – Instruments for Flood Prevention - HCBBS Forum
60. Historical trend issues with central control - HCBBS Forum
61. Look for an antifoaming agent - HCBBS Forum
62. Pressure transmitter issues - HCBBS Forum
63. The differential pressure flow transmitter shows full scale at the field, but the DCS does not indicate full scale - HCBBS Forum
64. Questions regarding the vacuum gauge readings - HCBBS Forum
65. Worm gear drive display switch - HCBBS Forum
66. The correct way to use greenhouse film - HCBBS Forum
67. Regulations regarding the service life of petrochemical plants - HCBBS Forum
68. Packing tower pressure drop - HCBBS Forum
69. 【Daily Question】Basic knowledge of coking: +6 wealth for correct answers, +2 wealth for participation. Question 2 from June 201506 - HCBBS Forum
70. Requirements for preparing an application to become a senior engineer - HCBBS Forum
71. What is the reason why an electric actuator gets hot as soon as it starts working? - HCBBS Forum
72. Weekly topic: 5 Wealth points for those who answer correctly, 2 Wealth points for participation； Question 72 - HCBBS Forum
73. I’m unemployed; please take me! - HCBBS Forum
74. One question per day: 6 wealth points for correct answers, 2 wealth points for participation, Question 216 - HCBBS Forum
75. Compilation of environmental protection laws and regulations - HCBBS Forum
76. Regarding the interference of chloride ions in COD determination - HCBBS Forum
77. Configuration of the FO control valve in Honeywell PKS systems - HCBBS Forum
78. Regarding self-registration by safety engineers - HCBBS Forum
79. Daily Question June 7, 2015 (Safe Communication): 3 wealth points for replies, 5 wealth points for correct answers; participation comes with rewards - HCBBS Forum
80. For media with relatively high concentrations, should a pump with high speed or one with low speed be chosen? - HCBBS Forum
81. Hydraulic wrench - HCBBS Forum
82. If one obtains two different registered engineer certificates, can they be affiliated with different organizations? - HCBBS Forum
83. What do you think of the Lakers’ rebuild? - HCBBS Forum
84. Sharing experience: The Fox D20 locator sends a full-close signal to the DCS, yet air leakage still occurs in the locator - HCBBS Forum
85. 【Daily Question】What is bubble entrainment, and what are its hazards? - HCBBS Forum
86. Reflux tank calculation - HCBBS Forum
87. What tasks do the metrology departments carry out? - HCBBS Forum
88. Dry quenching coke boiler drum safety valve - HCBBS Forum
89. 【Daily Question】Wastewater Knowledge-097 (June 10) (2 points for answering, 4 points for a correct answer) - HCBBS Forum
90. What is the purpose of the vent valve on a magnetic flap level gauge? - HCBBS Forum
91. I would like to ask about on-site grounding, mandatory inspection of pressure gauges, and other related issues - HCBBS Forum
92. Torsional vibration analysis of reciprocating compressors - HCBBS Forum
93. Weekly topic: 5 wealth points for those who answer correctly, 2 wealth points for participation； Question 63 - HCBBS Forum
94. What type of gasket is suitable for use with fuming sulfuric acid? - HCBBS Forum
95. The two motors must not share the same control switch - HCBBS Forum
96. What should be the pressure of the fuel gas or fuel oil for the heating furnace burner? - HCBBS Forum
97. GE coal-water slurry gasification - HCBBS Forum
98. Is it feasible to neutralize the acidity and alkalinity of high-temperature flue gas? - HCBBS Forum
99. Mandatory nature of project feasibility studies - HCBBS Forum
100. 【Summary】Summary of Updates on Coal-Based Methanol to Olefins Projects in Operation (20150328-20150403) - HCBBS Forum