English — Forum #723 (Page 428/642)

1. Listen quietly to a song that isn’t quiet–Gray Bird - HCBBS Forum
2. 20151207 One question per day - HCBBS Forum
3. Calculation of volumetric flow rate and mass flow rate - HCBBS Forum
4. December 8th: True/False question No. 114 on boiler foundations: (A certain score will be given to the top 60 participants) - HCBBS Forum
5. 【Daily Question】Question from Issue 20151209 - HCBBS Forum
6. 【Daily Question】12.8 Fill-in-the-blank: The structure of a horizontal thermosyphon reboiler is essentially that of a regular heat exchanger, with the only difference being the shell side.... - HCBBS Forum
7. Industry prospects - HCBBS Forum
8. Low-fin threaded tube - HCBBS Forum
9. Cold reflux instead of circulating reflux - HCBBS Forum
10. Why is the liquid discharged by the compressor acidic? - HCBBS Forum
11. What do people do when the ion membrane gets contaminated? - HCBBS Forum
12. How to calculate the crystallization heat of sodium chromate crystals - HCBBS Forum
13. Purification of catalytic dry gas - HCBBS Forum
14. Issues related to corrosion protection of heat exchangers - HCBBS Forum
15. Issues with process handover - HCBBS Forum
16. Density of supercooled water - HCBBS Forum
17. Jack Ma, Bill Gates, Zuckerberg... will invest billions of dollars in clean energy research and development - HCBBS Forum
18. How are the distances between structures and between buildings determined in the layout plan? - HCBBS Forum
19. 【Daily Question】Question from 20151202 - HCBBS Forum
20. 20151127 One question per day - HCBBS Forum
21. Do you still remember whether Wang Erxiao herded goats or sheep? - HCBBS Forum
22. Is your air compressor still leaking oil? - HCBBS Forum
23. Increase the sulfur-to-air ratio - HCBBS Forum
24. Several issues with safety instrumented systems - HCBBS Forum
25. 【Daily Question】11.26 Essay Question: What is the content of the five-character operation method? - HCBBS Forum
26. The three simultaneities for environmental assessment of new construction projects? - HCBBS Forum
27. How many of the top 10 snack streets in the country have you visited? - HCBBS Forum
28. (Basic knowledge) What is compact fluidization? - HCBBS Forum
29. What is generally done with the mixed salts that come out of wastewater these days? - HCBBS Forum
30. To what position should the pump’s minimum flow line return? - HCBBS Forum
31. Wax oil hydrorefining: What to do if there is a disruption in the natural gas supply to the feedstock heating furnace? ? - HCBBS Forum
32. Apple Affection (II) - HCBBS Forum
33. 【Daily Question】 December 7: What is the pressure difference between the upper and lower parts of the rotor in a rotor flow meter? ? Decision - HCBBS Forum
34. Environmental Protection Daily Quiz 12.4: Participate for prizes; 3 correct answers and another 3 prizes will be given - HCBBS Forum
35. Nitrogen generator oxygen content control - HCBBS Forum
36. Seeking help regarding manufacturers of heat transfer oil furnaces - HCBBS Forum
37. 【Daily Question】 December 1st - HCBBS Forum
38. Training videos on fire safety - HCBBS Forum
39. Why is the Northeast not suitable for building coal chemical industries? - HCBBS Forum
40. Is it necessary to use composite steel plate for this device? - HCBBS Forum
41. Registration deadline for the Professional English Test - HCBBS Forum
42. Selection of static grounding wires for ammonia systems - HCBBS Forum
43. My eyes are uncomfortable, what should I do? - HCBBS Forum
44. 20151130 One question per day - HCBBS Forum
45. Gasoline octane number recovery technology - HCBBS Forum
46. Addition: [Daily Question] December 13 – Petroleum fractions are generally characterized by ( ) to indicate their evaporation and vaporization properties. - HCBBS Forum
47. One question per day; those who answer correctly receive 6 wealth points, while participants receive 2 wealth points； Question 381 - HCBBS Forum
48. Selection of the drain valve behind the radiator - HCBBS Forum
49. One question per day - HCBBS Forum
50. How to determine whether the liquid level is the true level or not? - HCBBS Forum
51. 【Picture of the Day】11.27 Look at how festive the color of the tank in this picture is – guess what kind of tank it is - HCBBS Forum
52. 【Daily Question】November 26, 2015: Participation +2 Wealth； +3 to 8 wealth for correct answers - HCBBS Forum
53. Ebara water pump bearing replacement models - HCBBS Forum
54. Weekly topic: 5 wealth points for those who answer correctly, 2 wealth points for those who participate； Question 225 - HCBBS Forum
55. Why does the aldehyde content in the storage tank gradually increase to an unacceptable level despite the production of qualified ethylene glycol? - HCBBS Forum
56. Has anyone encountered issues with ultrasonic level gauges flickering? - HCBBS Forum
57. Addition: [Daily Question] December 12 – Among the following substances, which one contains free nitrogen? - HCBBS Forum
58. How to conduct a airtightness test on a negative pressure tower? - HCBBS Forum
59. Is it necessary to equip the low-pressure ash water pump with an automatic start function? - HCBBS Forum
60. Seek contact information for TEC artec’s representative office in China - HCBBS Forum
61. Thermal inspection system - HCBBS Forum
62. Has anyone analyzed the flow patterns of styrene in the domestic market? - HCBBS Forum
63. The effect of MTO-grade methanol on olefins - HCBBS Forum
64. (Basic knowledge) What are the characteristics of widely screened particles? - HCBBS Forum
65. Are vertical thermosyphon reboilers equipped with valves or orifice plates on the inlet pipe? - HCBBS Forum
66. Pump and valve welding materials - HCBBS Forum
67. Crystallization issues in double-alkali desulfurization - HCBBS Forum
68. What is the fire hazard classification for hydrogen fluoride gas? - HCBBS Forum
69. ★Note: Specialty Exam for Chemical Engineering ★ — One question per day (2015-12-3) — Increased participation - HCBBS Forum
70. Please help choose a centrifugal pump, thank you! ! (Used on the Metso Caba analyzer) - HCBBS Forum
71. What to do if acid-base oil washing and filtration are very slow - HCBBS Forum
72. What preparations are required for instrument automation before a project starts? - HCBBS Forum
73. 【Daily Question】Chemical Engineering Principles 244: Types of Pipes (November 25) - HCBBS Forum
74. 【Weekly Topic】: Investigation into the closure status of the gasification framework? - HCBBS Forum
75. Civil Engineering Structure Discussion Area ----【Daily Question】Question from Issue 20151203 - HCBBS Forum
76. What principles are generally used to design the dimensions of the water seal tank in storage tanks? - HCBBS Forum
77. 【Daily Question No. 63】November 26, 2015: +2 wealth for participation, plus another +3 to +8 wealth for correct answers - HCBBS Forum
78. Xinjiang Guanghui Sinochem Energy Technology Development Co., Ltd. (Xi’an Branch) - HCBBS Forum
79. Looking for job recommendations. - HCBBS Forum
80. Process design of diesel storage tanks - HCBBS Forum
81. Oxygen content in contaminated nitrogen gas - HCBBS Forum
82. Pneumatic metering pump - HCBBS Forum
83. 【Picture of the Day】11.26: What is this device in the picture, and where is it used? - HCBBS Forum
84. Does the quick on/off operation of the control valve have any requirements regarding the control gas? - HCBBS Forum
85. Coal powder mass flow meter - HCBBS Forum
86. How are the eccentric load Ge and the eccentricity Se in a supported bearing determined? - HCBBS Forum
87. The bottom pump of the distillation tower cannot discharge material – how to solve it? ? ? - HCBBS Forum
88. 【Daily Question】Chemical Engineering Principles 251: Theoretical Plates (December 2) - HCBBS Forum
89. **Chemical warehouse management - HCBBS Forum
90. Methanol wash tower of the MTBE plant - HCBBS Forum
91. 【Daily Question】11.28 Multiple-choice question Tongue-shaped trays belong to ( ) - HCBBS Forum
92. What is the difference between high-pressure and low-pressure vent tanks? - HCBBS Forum
93. 【Daily Question】Question from the 20151125 issue - HCBBS Forum
94. Should this condenser have an expansion joint? - HCBBS Forum
95. What is the difference between a regulated valve and a control valve? - HCBBS Forum
96. What is the difference between GEN-HT- and GEN-HS in heat exchangers? - HCBBS Forum
97. Regarding instrument SIS control - HCBBS Forum
98. Which type of demister is better for limestone-gypsum wet flue gas desulfurization? - HCBBS Forum
99. Design of heating coils for asphalt tanks - HCBBS Forum
100. December 3rd, Boiler Foundation Question 109: (A certain score will be given to the top 50) - HCBBS Forum