English — Forum #337 (Page 63/163)

1. Treatment methods for spent activated carbon - HCBBS Forum
2. I have a question for experts in boiler technology - HCBBS Forum
3. Does anyone have the contact information for hydrogenation catalyst manufacturers? - HCBBS Forum
4. A shut-off valve is installed on the inlet pipeline of the methanol storage tank; can it also be installed on the pump’s inlet pipeline? - HCBBS Forum
5. Is it necessary to install a nitrogen blanket for underground methanol storage tanks? - HCBBS Forum
6. Which control method is better? - HCBBS Forum
7. Has anyone ever seen this kind of separator? - HCBBS Forum
8. How is liquid ammonia loaded and unloaded? - HCBBS Forum
9. I have a question about azeotropy - HCBBS Forum
10. Aircraft gasoline loading/unloading, pre-filtering? Coarse filtering? Fine filtration? Newcomers don’t understand why there are so many filters. . . - HCBBS Forum
11. Backpressure issue in liquefied hydrocarbon pipeline expansion lines - HCBBS Forum
12. [Daily Question] Basic Process Knowledge (True/False Questions) 201912 17 - HCBBS Forum
13. Technical and Economic «Parameters and Data» for Project Feasibility Studies of Sinopec Group Corporation - HCBBS Forum
14. What inspections are required for pressure vessels and pipelines that are being put into use again in a high-pressure catalytic hydrogenation unit that has been idle for two years? - HCBBS Forum
15. Which of the emitted gases are considered waste gases? - HCBBS Forum
16. What are the reasons for the high water content in crude methanol? - HCBBS Forum
17. There are problems with the production of basic copper chloride - HCBBS Forum
18. Calculate the steam flow rate based on the water flow rate and calorific value - HCBBS Forum
19. Seeking everyone's advice on steam electric heating - HCBBS Forum
20. Can urban natural gas gate stations avoid centralized venting? - HCBBS Forum
21. Can the 316L heat exchange tube be used for a long time in alkali solution with a concentration of 10% at around 60-70 degrees? - HCBBS Forum
22. With changes in the pressure before the pressure relief valve and the self-acting control valve, can the pressure after the valve remain stable? - HCBBS Forum
23. Question for assistance: When a nitrogen seal is installed in a storage tank, should the diameter be increased downstream of the nitrogen seal valve? - HCBBS Forum
24. Search: GB/T30923-2014 Standard for plastic polypropylene (PP) material specifically for melt blowing** - HCBBS Forum
25. How is the string voltage risk level defined? - HCBBS Forum
26. Regarding the issue of determining the condenser inlet temperature - HCBBS Forum
27. I wonder why, in addition to the motor needing to be explosion-proof, the impeller of a centrifugal fan also has to be explosion-proof? - HCBBS Forum
28. Heat treatment issues after welding of hydrogen sulfide-resistant pipelines - HCBBS Forum
29. [Daily Question] Basic Process Knowledge (True/False: Fill in “√” for correct and “×” for incorrect) 2020.5.16 - HCBBS Forum
30. I would like to ask if each branch pipe of the combustible gas vent pipe is connected to the main pipe. Should the flame arrester be placed on each branch pipe or the main pipe? - HCBBS Forum
31. [Daily Question] Basic Process Knowledge (Multiple Choice) 20200407 - HCBBS Forum
32. The blind panel has secondary lines. Can this blind panel still be absolutely isolated? - HCBBS Forum
33. Sulfur Recovery Technology Exchange Group - HCBBS Forum
34. I have a question regarding vertical vapor-liquid separators that I’d like to ask everyone - HCBBS Forum
35. What is a remote monitoring system for the automatic control of temperature, liquid level, flow rate, and emergency shutdown? - HCBBS Forum
36. [Daily Question] Basic Process Knowledge (True/False: Fill in “√” for correct and “×” for incorrect) 2020.4.13 - HCBBS Forum
37. Designing heat exchangers: setting the minimum heat transfer temperature difference - HCBBS Forum
38. Construction of chemical engineering projects - HCBBS Forum
39. Help request: Design of gas distributor - HCBBS Forum
40. New Comprehensive Book on the Design of Drug Synthesis Reaction Route Maps and New Practical Techniques in Production Processes - HCBBS Forum
41. [Daily Question] Basic Process Knowledge (Multiple Choice) 20200308 - HCBBS Forum
42. How should flammable liquids such as propylene and methyl tert-butyl ether be stored safely? - HCBBS Forum
43. [Daily Question] Basic Process Knowledge (True/False Questions) 20191117 - HCBBS Forum
44. May I ask how many level points are required by the specifications for storage tanks, such as high-high, high, medium, low, low-low, etc.? - HCBBS Forum
45. May I ask what software was used to draw the color pictures in the paper? What kind of software was used to draw the paper pictures? - HCBBS Forum
46. High reward for professionals in desulfurization exhaust air handling! - HCBBS Forum
47. I’m a bit confused about the understanding of hazardous waste and solid waste. - HCBBS Forum
48. [Daily Question] Basic Process Knowledge (True/False: Fill in “√” for correct and “×” for incorrect) May 7, 2020 - HCBBS Forum
49. Expansion amount calculation - HCBBS Forum
50. Milestone Software---Functions of the Intelligent Support and Hanger System - HCBBS Forum
51. Material selection for gaseous hydrochloric acid - HCBBS Forum
52. Future market prospects for non-woven fabrics - HCBBS Forum
53. Method for determining the inspection ratio of pressure pipelines - HCBBS Forum
54. Material selection for solid sodium hydroxide dissolution tanks - HCBBS Forum
55. I’m looking for information on environmental protection projects, environmental engineering, chemical plants, and other relevant contacts for business purposes. What are the best ways to find this information? - HCBBS Forum
56. On the dewatering effect of coagulators - HCBBS Forum
57. Basic Process Knowledge (True/False Questions: Fill in “√” for correct answers and “×” for incorrect ones) May 25, 2020 - HCBBS Forum
58. Is it normal for 98% sulfuric acid to be milky white? - HCBBS Forum
59. [Daily Question] Basic Process Knowledge (True/False Questions) 20191122 - HCBBS Forum
60. [Daily Question] Basic Process Knowledge (Multiple Choice) 20200212 - HCBBS Forum
61. [Daily Question] Basic Process Knowledge (True/False: Fill in “√” for correct and “×” for incorrect) April 15, 2020 - HCBBS Forum
62. Illustration of two polylactic acid synthesis processes - HCBBS Forum
63. How can process engineers grow? - HCBBS Forum
64. Seek advice: choosing an offer from campus recruitment - HCBBS Forum
65. The organic waste gas contains a small amount of hydrochloric acid vapor; what material is suitable for use in adsorption equipment? - HCBBS Forum
66. [Daily Question] Basic Process Knowledge (Multiple Choice) 20191031 - HCBBS Forum
67. Shielded pumps are highly sensitive to cavitation - HCBBS Forum
68. Technical characteristics of closed-shell hydroforming - HCBBS Forum
69. What material is suitable for the finer hoses used in dosing pumps at present? - HCBBS Forum
70. Using polyvinyl alcohol for puffing - HCBBS Forum
71. How to reduce water consumption for filter cake washing - HCBBS Forum
72. What type of pump is suitable for pumping lime milk? - HCBBS Forum
73. Steam condensate recovery - HCBBS Forum
74. What is the standby state of a filter? - HCBBS Forum
75. One-line diagram shading - HCBBS Forum
76. How is medium toxicity defined? - HCBBS Forum
77. What standards should be used in the design and manufacture of atmospheric pressure vessels with design pressures other than zero? - HCBBS Forum
78. Where can I find the specifications for π-type expansion joints - HCBBS Forum
79. Seeking sources for oxychlorination technology - HCBBS Forum
80. A question regarding the nitrogen sealing of storage tanks - HCBBS Forum
81. Seeking advice on the emergency cooling of stainless steel reaction vessels - HCBBS Forum
82. What software was used to create the 3D models of the wastewater treatment plant (tanks, equipment, etc.) presented during the bidding process? - HCBBS Forum
83. The purification air dew point curve is as shown below. What’s going on? Which manufacturer is this dew point meter from?~ - HCBBS Forum
84. Questions about **mandatory standards - HCBBS Forum
85. There are occupational exposure limits, but is it necessary to install toxic gas detection alarms for those not required by the regulations? - HCBBS Forum
86. Solid acid catalysts - HCBBS Forum
87. Circulation flow rate in chemical processing units - HCBBS Forum
88. Does the electrolysis of hydrogen fluoride fall under the category of electrolytic processes that are subject to strict regulation? - HCBBS Forum
89. Are combustible gas detectors required to be installed near air compressors? Which standard specifies this? - HCBBS Forum
90. Why is a bypass line provided separately for the check valve at the pump outlet? - HCBBS Forum
91. The pressure inside the filter is 1 MPa. A backwashing system is installed at the filter outlet; the backwashing is carried out using liquid at 2 MPa for a duration of 2 seconds. Could water hammer occur? - HCBBS Forum
92. How are the high and low reports determined in a DCS system? Is it based on experience? - HCBBS Forum
93. Electrodialysis (ED) - HCBBS Forum
94. [Daily Question] Basic Process Knowledge (Multiple Choice) 20200402 - HCBBS Forum
95. What’s going on with the Spillback process? What is pump spillback? - HCBBS Forum
96. Low boiling point, how to separate after mixing - HCBBS Forum
97. Problem with the steam trap - HCBBS Forum
98. Temperature of benzene extraction sensitive plate - HCBBS Forum
99. What is the heat of combustion of several organic substances? - HCBBS Forum
100. What is the fire hazard category of spent activated carbon that has absorbed some Class A gases? - HCBBS Forum