English — Forum #723 (Page 460/642)

1. Petrochemical Deep Processing Zone [One Question per Day] Summary Thread – Updated daily by the moderator - HCBBS Forum
2. Briefly describe the process of lifting and positioning tower-type equipment? - HCBBS Forum
3. Decarboxylation of tetra- and pentacarbon compounds in light hydrocarbon distillation towers - HCBBS Forum
4. Civil Engineering Structure Discussion Area ---- [Daily Question] Question from the 20151115 issue - HCBBS Forum
5. Problem of catalyst replacement in the aromatic extraction clay column - HCBBS Forum
6. 【Daily Question】November 12th Where does the coking reaction take place? ? ? It was carried out. - HCBBS Forum
7. Rosemount 5400 radar issues - HCBBS Forum
8. Is there anyone who works with water pumps, imported ones? Seeking quotes. A newcomer in the design field - HCBBS Forum
9. 【Daily Question】11.14 True or False: The sound similar to metal striking that is heard coming from the cylinder of a reciprocating compressor - HCBBS Forum
10. Describe the different methods for taking pressure readings using orifice plates What are their respective characteristics? - HCBBS Forum
11. On the selection of pneumatic and electric instruments in petrochemical industries - HCBBS Forum
12. Should the tray support rings of the hydrogenation reactor be welded to the transition layer or the face layer? - HCBBS Forum
13. 【Popular Science on Polymers and Materials】--008 Bubble gum needs to be chewed before blowing bubbles+jlszhoujidai - HCBBS Forum
14. In the AO process, the ammonia nitrogen level in the system rises suddenly and rapidly - HCBBS Forum
15. One question per day; those who answer correctly receive 6 wealth points, while participants receive 2 wealth points； Question 357 - HCBBS Forum
16. What is aluminum chloride coagulant? - HCBBS Forum
17. Please report your household’s gas usage metrics - HCBBS Forum
18. The differential-pressure V-cone flow meter fails to detect the differential pressure, resulting in a low flow rate; how can this be resolved? - HCBBS Forum
19. Are there any American boiler companies that have branches or offices in China? - HCBBS Forum
20. Issues regarding the use of naphtha fuel oil in the production of ethylene and aromatic products - HCBBS Forum
21. 【Daily Question】 November 20th Is it generally used for pipeline penetration? ? ? ? ? - HCBBS Forum
22. What is the space velocity of tower equipment? - HCBBS Forum
23. Belt scale - HCBBS Forum
24. Catalytic slurry yield - HCBBS Forum
25. 【Daily Question】 November 13th: What is the purpose of the reflux at the top of a distillation column? - HCBBS Forum
26. Ethylene glycol from coal - HCBBS Forum
27. Analysis of alkylation raw materials - HCBBS Forum
28. Avoid the ten \"misconceptions\" about environmental protection” - HCBBS Forum
29. 【Daily Question】Question from Issue 20151111 - HCBBS Forum
30. Mesityl bromination - HCBBS Forum
31. 【Daily Question】November 7, 2015: Participation +2 Wealth； +3 to 8 wealth for correct answers - HCBBS Forum
32. Looking for a simulation file on CO2 recovery in a help forum - HCBBS Forum
33. Advice from an organic synthesis professional to help you avoid detours! - HCBBS Forum
34. Regarding the torch testing issue at the LNG receiving station, I would like to ask the teacher for an explanation. - HCBBS Forum
35. Company recruiting engineers - HCBBS Forum
36. Crystallization treatment in desulfurization system - HCBBS Forum
37. Is another liquid filled inside the magnetic flap level gauge on the ammonia tank? - HCBBS Forum
38. Regarding the temperature difference in the superheater header - HCBBS Forum
39. How is the mass of ammonia in wastewater calculated? - HCBBS Forum
40. When is the right time to issue a commercial invoice to the customer? - HCBBS Forum
41. Regarding float valve towers - HCBBS Forum
42. Information on pneumatic clutches - HCBBS Forum
43. What is the impact of the circulation ratio on the combustion in circulating fluidized bed boilers? - HCBBS Forum
44. What are the requirements for fire-resistant coatings on steel structures according to foreign standards? - HCBBS Forum
45. When the air flow on the downstream side of the self-acting pressure regulator is 0, do the pressures before and after remain unchanged, or do they gradually reach equilibrium? - HCBBS Forum
46. What are the characteristics of vortex flow meters? - HCBBS Forum
47. Environmental Protection Daily Quiz: Participate on 11.11 for prizes; 3 correct answers earn an additional 5 as a bonus (Singles’ Day treat) - HCBBS Forum
48. What is the role of recycled hydrogen? Why is the compressor considered the heart of the reforming unit? - HCBBS Forum
49. What are the maintenance tasks for a carbon dioxide absorption tower? - HCBBS Forum
50. ASTM material properties - HCBBS Forum
51. 【Daily Question】11.13 True or False: Reversing the direction of rotation causes significant damage to the pump body - HCBBS Forum
52. Operation after surge in a centrifugal compressor - HCBBS Forum
53. Minister of Safety and Environmental Protection - HCBBS Forum
54. Construction drawings for HG21514～21535 steel manholes - HCBBS Forum
55. Can anaerobic bacteria be returned to the UASB reactor? - HCBBS Forum
56. Treatment of concentrated solutions from high-salt wastewater by evaporation - HCBBS Forum
57. Wanhua’s plant restarts; the operating rate of local MTBE plants reaches its highest level this year - HCBBS Forum
58. Why does a NY400 pad that hasn’t been used in a year start leaking? - HCBBS Forum
59. Explanation of the structure of gas boiler burners - HCBBS Forum
60. Seeking advice on treatment technologies for high-salt wastewater from chlor-alkali production! - HCBBS Forum
61. Case Review: Explosion Caused by Illegal Welding Work - HCBBS Forum
62. 【Daily Question】Question from Issue 20151110 - HCBBS Forum
63. How to simulate an exhaust gas scrubber using PRO/II, and how to set it up? - HCBBS Forum
64. Sign-in record post from November 12, 2015 - HCBBS Forum
65. Weekly topic: 5 wealth points for those who answer correctly, 2 wealth points for participation； Question 212 - HCBBS Forum
66. Principles of chemical engineering in daily life – The principle behind a burning oil pan - HCBBS Forum
67. Urgent! ! ! PDMS cannot be operated - HCBBS Forum
68. Issues with raw materials and products - HCBBS Forum
69. A friend of mine knows the following information; how can I find out his username? - HCBBS Forum
70. No hope in sight - HCBBS Forum
71. Vacuum feeder – catalyst is fed from the 1st floor to the 3rd floor - HCBBS Forum
72. 【Daily Question】November 13, 2015: Design of fixed-tube-sheet heat exchangers (first 80 participants + 2 rewards) - HCBBS Forum
73. Everyone, work on question 54-2: multiple-choice questions 29-30 from the 2015 First-Class Constructor Examination in Project Management; there will be a reward for those who answer correctly - HCBBS Forum
74. I am looking for the contact information of design firms that possess PAO synthetic oil technology; please help me out - HCBBS Forum
75. One question per day (1110) - HCBBS Forum
76. What are the vortex detection elements? How are they detected? - HCBBS Forum
77. Differential pressure for level measurement - HCBBS Forum
78. Is pure nickel, used as a reaction raw material, considered a **chemical? - HCBBS Forum
79. Why can’t valve body sizes of 1¼” and 2½” be used - HCBBS Forum
80. One Question per Day 20151109 - HCBBS Forum
81. Reduced turbine coasting time - HCBBS Forum
82. Should a steam trap be of the thermodynamic disc type or the pulse type? - HCBBS Forum
83. Looking for high-temperature thermocouple products - HCBBS Forum
84. Antifreezing of the shutdown system - HCBBS Forum
85. Seek CAD or PDF of ammonia recovery process diagram - HCBBS Forum
86. Is the naphtha resource from local refineries in Shandong actually in short supply? - HCBBS Forum
87. How to install a metal rotameter mounted on a vacuum suction pipe - HCBBS Forum
88. Please, experts and seniors, give me some guidance - HCBBS Forum
89. Special Topic 3 of the Registered Chemical Engineer Professional Examination: Chemical Thermodynamics Processes - HCBBS Forum
90. Why does the flow rate of a centrifugal pump increase as the water level rises? - HCBBS Forum
91. What does the meaning of the mandatory principle in security management entail? - HCBBS Forum
92. What are the factors that affect the design capacity of cooling towers? - HCBBS Forum
93. 【Popular Science Tips on Polymers and Materials】--004 Polymers in the Eyes of Engineers + Fish in the Desert - HCBBS Forum
94. What is high-temperature low-oxygen combustion technology? - HCBBS Forum
95. What is the frequency conversion signal type of the pump? - HCBBS Forum
96. What kind of flowmeters are used for measuring the ammonia to *ao acid ratio at the inlet of a 200,000-ton ** tubular reactor? - HCBBS Forum
97. Environmental Protection Daily Quiz 11.9: Participate for prizes; 3 correct answers earn an additional prize of 2 - HCBBS Forum
98. Are there high-pressure slurry pumps that don’t require water cooling? - HCBBS Forum
99. Issues with valve position feedback using a HART smart valve actuator? - HCBBS Forum
100. Part 4 of the college debate series: It’s quite popular to talk about entrepreneurship these days; so what’s our view on college students starting businesses? - HCBBS Forum