English — Forum #723 (Page 421/642)

1. 【Picture of the Day】12.11 Do you know what kind of testing device this is? 10 wealth points for those who answer correctly! - HCBBS Forum
2. 【Daily Question】12.11 True or False: The distillation process is a process of two-way mass and heat transfer - HCBBS Forum
3. I earnestly request valuable literature on the calculation of the relief valve discharge capacity under tube rupture conditions in heat exchangers - HCBBS Forum
4. Lubrication and maintenance mechanisms of common machine pumps - HCBBS Forum
5. Regarding gasoline blending issues - HCBBS Forum
6. Fluctuations in the acid flow rate in the first and second absorption towers - HCBBS Forum
7. Physical property selection - HCBBS Forum
8. Why does the mechanical seal leak sometimes and not at other times during operation? - HCBBS Forum
9. In-depth explanation of 20 types of severe damage – essential knowledge for everyone who cares about safety! - HCBBS Forum
10. On heating solid materials with flue gas - HCBBS Forum
11. Torque display NMB csd-701b Torque display instruction manual - HCBBS Forum
12. 【Daily Question】Question from Issue 20151214 - HCBBS Forum
13. Choose DCS or PLC - HCBBS Forum
14. The honest thoughts of an environmental protection veteran on ultra-low emissions from coal-fired power plants and environmental subsidies! - HCBBS Forum
15. Oil tank sludge removal process - HCBBS Forum
16. Static grounding alarm - HCBBS Forum
17. Seeking manufacturers and information on the use of clearance adjustment in reciprocating compressors - HCBBS Forum
18. How to deal with the blockage in the cooler of the reduced-pressure residue outlet unit? - HCBBS Forum
19. Wastewater treatment is a hurdle in the development of coal chemical industry - HCBBS Forum
20. I’ve attached my own compilation titled “Inspection of Pressure Relief Towers”; I hope experts can offer their guidance - HCBBS Forum
21. What is the difference between secondary flashing and tertiary flashing for graywater? - HCBBS Forum
22. Reasons for frequent damage of the 3700A card in the TS3000 control system - HCBBS Forum
23. Deaerator water temperature - HCBBS Forum
24. I would like to ask how to calculate traffic - HCBBS Forum
25. Environmental Protection Daily Quiz 12.9: Participate for prizes; 3 correct answers earn an additional 3 prizes - HCBBS Forum
26. One question per day; those who answer correctly receive 6 wealth points, while participants receive 2 wealth points； Question 388 - HCBBS Forum
27. Environmental Protection Daily Quiz 12.14: Participate for prizes; 3 answers correct and you’ll get another 3 prizes - HCBBS Forum
28. Which are the good domestic brands of mass flow meters? - HCBBS Forum
29. Weekly topic: 5 Wealth points for correct answers, 2 Wealth points for participation； Question 233 - HCBBS Forum
30. Why is the H2S level in the exhaust gas from the CO2 separation tower too high, while the CO2 content is lower than normal? - HCBBS Forum
31. Is spray drying used in China to produce anhydrous betaine? How effective is it? - HCBBS Forum
32. Regarding the material temperature issue - HCBBS Forum
33. The difference between refrigerators and chillers - HCBBS Forum
34. What is a good densitometer for measuring the density of corrosive solutions? - HCBBS Forum
35. Sulfur issues in the liquid sulfur tank - HCBBS Forum
36. idiot - HCBBS Forum
37. PCB Plating Department - HCBBS Forum
38. Centrifugal pump oil seal specifications - HCBBS Forum
39. 【Petroleum Activities】Promotional poster for the Best SimSun Font competition – Don’t forget to vote if you’ve been given money! - HCBBS Forum
40. Chemical deaerator - HCBBS Forum
41. Which domestic manufacturers can produce such ring forgings? - HCBBS Forum
42. “\"Zero-oil\" air compressors = environmentally friendly and safe? - HCBBS Forum
43. Pre-treatment measures for waste gas incinerators in the pharmaceutical industry - HCBBS Forum
44. Microorganisms play a key role in dealing with volatile organic compounds - HCBBS Forum
45. Two calculation problems on water vapor evaporation - HCBBS Forum
46. What are the dew point temperatures of methanol and dimethyl ether at different pressures? ? ? - HCBBS Forum
47. Cannot pump enough volume - HCBBS Forum
48. The internet is very slow today. Why? - HCBBS Forum
49. Who has photos of the small platform with a core access hatch outside the storage tank? - HCBBS Forum
50. A problem with major hazard sources - HCBBS Forum
51. Repainting building coatings makes old buildings more attractive - HCBBS Forum
52. One question per day (multiple choice) - HCBBS Forum
53. Is a tube bundle or a coiled heat exchanger better for the top of a methanol distillation tower? - HCBBS Forum
54. The chemical industry is too poor, so I’ve started a small side business; I hope all fellow netizens will support me and wish my business success - HCBBS Forum
55. Software for calculating steam consumption in steam jet pumps - HCBBS Forum
56. Construction of a 20-million-ton oil refining plant has begun on Changxing Island - HCBBS Forum
57. I would like to ask about Plan53 - HCBBS Forum
58. 【Daily Question】Chemical Engineering Principles 263: Turbulent Flow (December 14) - HCBBS Forum
59. How can the gas-phase fraction expressed in terms of quality be obtained from ASPEN results? - HCBBS Forum
60. What failure criteria are used for pressure vessels, boilers, lifting machinery, and elevators in our country respectively? - HCBBS Forum
61. Questions about steam stripping - HCBBS Forum
62. On the treatment of phosphorus-containing wastewater - HCBBS Forum
63. I’m new to wastewater treatment and seeking advice - HCBBS Forum
64. pds desulfurization - HCBBS Forum
65. How is COD generated in the ash water from gasification? - HCBBS Forum
66. Environmental Protection Daily Quiz 12.11: Participate for prizes; 3 answers correct and you’ll get another 3 prizes - HCBBS Forum
67. Global is moving into the coal chemical industry - HCBBS Forum
68. What is the situation with gravity-fed return water and pressure-driven return water in cooling exchange equipment? - HCBBS Forum
69. 【Daily Question】12.12 True or False: After purging towers, containers, etc. with steam in winter, the vent switch must be closed to prevent freezing - HCBBS Forum
70. PID process piping and instrumentation diagram – I don’t know where to start - HCBBS Forum
71. 【Daily Question】December 10, 2015: Participation +2 Wealth； +3 to 8 wealth for correct answers - HCBBS Forum
72. Weekly topic: 5 wealth points for those who answer correctly, 2 wealth points for participation； Question 237 - HCBBS Forum
73. 1 point per true or false question - HCBBS Forum
74. Water distribution in a multi-nozzle opposed-type quenching ring - HCBBS Forum
75. Some inconveniences of the client side - HCBBS Forum
76. High/low speed switching for variable-frequency mixer - HCBBS Forum
77. Summary of winter anti-freezing measures - HCBBS Forum
78. Are there any manufacturers of CO2 membrane separation technology? - HCBBS Forum
79. What are the standards for quench water, washing water, and recycled ash water in various gasification furnaces? - HCBBS Forum
80. What water-saving measures have those involved in Texaco’s water-coal slurry gasification adopted? - HCBBS Forum
81. In ammonia-based desulfurization, how is the circulation rate of the circulation pump in the concentration circulation tank calculated? - HCBBS Forum
82. 【Daily Question No. 46】December 15, 2015: +2 wealth for participation, +3 wealth for a correct answer - HCBBS Forum
83. One question per day; those who answer correctly receive 6 wealth points, while participants receive 2 wealth points； Question 387 - HCBBS Forum
84. I have a few questions regarding the control valve assembly; I’d like to ask the experts - HCBBS Forum
85. Is the \"Professional and Technical Position Qualification Certificate\" issued by the employer itself useful? - HCBBS Forum
86. Occupational Health Fill-in-the-Blanks 2 - HCBBS Forum
87. Time issue in pressure swing adsorption hydrogen production? - HCBBS Forum
88. What are the specified safe flow rates for materials? - HCBBS Forum
89. One question per day; those who answer correctly receive 6 wealth points, while participants receive 2 wealth points； Question 390 - HCBBS Forum
90. In a reformation unit, which equipment uses low-voltage electricity and which uses high-voltage electricity? - HCBBS Forum
91. 【Daily Question】12.11 Short Answer: What are the reasons for a pump to stop operating automatically? What should be done in this situation? - HCBBS Forum
92. 【Daily Question】December 14, 2015: Participation +2 Wealth； +3 to 8 wealth for correct answers - HCBBS Forum
93. I have a question regarding gas volume; please advise - HCBBS Forum
94. How to translate “One equality, two purity, three vision, four absence, five lacklessness”” - HCBBS Forum
95. Distillation kettle level selection - HCBBS Forum
96. Is communication like this effective? - HCBBS Forum
97. Torque of reciprocating compressors - HCBBS Forum
98. Hot oil pump preheating issue - HCBBS Forum
99. Regarding the wall thickness issue for 200 small-diameter pipes under custody - HCBBS Forum
100. Temperature drop calculation for pipelines and storage tanks - HCBBS Forum