English — Forum #337 (Page 91/163)

1. For ultrafiltration systems, the transmembrane pressure difference can be used to determine when cleaning or backwashing is necessary; but what is used to determine when backwashing or cleaning is needed in reverse osmosis systems? - HCBBS Forum
2. Dehydrogenation of ethylbenzene to styrene - HCBBS Forum
3. Process pipe diameter selection? - HCBBS Forum
4. Mercury removal technologies - HCBBS Forum
5. [Daily Question] Basic Process Knowledge (True/False Questions) 20190320 - HCBBS Forum
6. Consult on the feasibility of using catalytic cracking slurry as a POX feedstock - HCBBS Forum
7. What is the Raoult vapor pressure of catalytically reformed gasoline? - HCBBS Forum
8. Seeking expert help with freezing system calculations - HCBBS Forum
9. Design of gas protection station - HCBBS Forum
10. Calculation of the flow rate in the tube side of a heat exchanger - HCBBS Forum
11. Is the timing for determining medium toxicity based on the date when the project is submitted for approval? Or should it be based on the project acceptance? - HCBBS Forum
12. How to simulate the diffusion of gases heavier than air using FLaresim - HCBBS Forum
13. The function of the four-stage outlet differential pressure valve for the propylene unit in the SW process - HCBBS Forum
14. Problems with acetylene busbars - HCBBS Forum
15. [Daily Question] Basic Process Knowledge (Multiple Choice) 20190204 - HCBBS Forum
16. 【Daily Question】 【AC Version for Static Equipment...Question 100】 April 10, 2019 – Revised multiple-choice questions...Everything is going well - HCBBS Forum
17. Calculations for preparing a K2CO3 solution - HCBBS Forum
18. [Daily Question] Basic Process Knowledge (Multiple Choice) 20190114 - HCBBS Forum
19. The role of IGBT in variable-frequency power supplies: What is the working principle of IGBT? - HCBBS Forum
20. Separation of ternary azeotrope systems - HCBBS Forum
21. 【Daily Question】 【AC Version for Static Equipment... Question 26】 January 26, 2019 – True/False Question... A bright future ahead - HCBBS Forum
22. What is the nominal pressure for? What’s the use? - HCBBS Forum
23. Fundamentals of Manufacturing Processes (Multiple Choice) 20181130 - HCBBS Forum
24. Illustrated simple calculation method for the short pipe in a elbow - HCBBS Forum
25. The holidays are coming up soon – how much bonus can those working in chemical engineering design expect? - HCBBS Forum
26. 【Daily Question】 【AC Version for Static Equipment...Question 08】 January 8, 2019 – True/False Multiple Choice Question...Wish you all the best - HCBBS Forum
27. catalyst - HCBBS Forum
28. [Daily Question] Basic Process Knowledge (Multiple Choice) 20190127 - HCBBS Forum
29. Conditions provided by the process to the instruments - HCBBS Forum
30. Heat exchanger network design - HCBBS Forum
31. Compressed air, nitrogen storage tanks - HCBBS Forum
32. Activation scheme for hydrogenation catalyst in butyl octyl alcohol plant - HCBBS Forum
33. Activated carbon production - HCBBS Forum
34. Understanding the provisions of GB50489 \"Code for General Layout and Transportation Design of Chemical Enterprises\" - HCBBS Forum
35. What should be included in a complete set of process construction drawings provided by a design institute? - HCBBS Forum
36. I have a question regarding the fire separation requirements for factory buildings - HCBBS Forum
37. [Daily Question] Basic Process Knowledge (Multiple Choice) 20190217 - HCBBS Forum
38. Leak detection of formaldehyde oxidizer head - HCBBS Forum
39. Maximum cooling water temperature and maximum temperature difference - HCBBS Forum
40. [Daily Question] Basic Process Knowledge (True/False Questions) 20190407 - HCBBS Forum
41. 【Daily Question】【AC Version for Static Equipment...Question 108】April 18, 2019 – Revised multiple-choice questions...Everything is going well - HCBBS Forum
42. Factors affecting the yield of light hydrocarbons - HCBBS Forum
43. I’m asking: every time the low-pressure steam pipeline is opened, it vibrates heavily, generates a lot of noise, and there are significant water hammer effects. Are there any good measures or methods to address this? - HCBBS Forum
44. Chloride ions in methanol production - HCBBS Forum
45. Heat exchange between the high-temperature ethylene gas produced by bogging and the low-temperature liquid - HCBBS Forum
46. I have a question regarding a kettle-type reboiler - HCBBS Forum
47. When using circulating water to cool steam, is it necessary to install a safety valve on the circulating water pipeline? Which specification specifies this? - HCBBS Forum
48. I need help installing a device outside the pipeline - HCBBS Forum
49. [Daily Question] Basic Process Knowledge (True/False Questions) 20190316 - HCBBS Forum
50. How to implement process isolation - HCBBS Forum
51. 【Daily Question】 【AC Version for Static Equipment...Question 84】 March 25, 2019 – Revised multiple-choice questions...Everything is going well - HCBBS Forum
52. Chemical projects such as natural gas production from straw - HCBBS Forum
53. How to select the damper for the inducer fan inlet? - HCBBS Forum
54. Characteristics of hydrocracking denitration reaction - HCBBS Forum
55. The impact of pressure on the gasifier - HCBBS Forum
56. Regarding the high tank pressure when propylene is fed into the spherical tank, can it be handled in this way? - HCBBS Forum
57. Process Engineering Technology Section – Recommendations for Outstanding Members, Self-Recommendation Posts - HCBBS Forum
58. [Daily Question] Basic Process Knowledge (True/False Questions) 20190318 - HCBBS Forum
59. What are the suitable aromatic extraction solvents for catalytic diesel or hydrocatalyzed diesel? - HCBBS Forum
60. What are the European standards for fuel oil? - HCBBS Forum
61. Will the water not flow if the drain valve is chosen to be too large? Is there any way? - HCBBS Forum
62. What are the three basic ways of heat transfer? - HCBBS Forum
63. Atmospheric and vacuum distillation unit - HCBBS Forum
64. Are there any distance requirements between the safety valve installed on the pipeline and the pipeline fittings upstream and downstream of it? ? - HCBBS Forum
65. Air separation - HCBBS Forum
66. [Daily Question] Basic Process Knowledge (Fill-in-the-blank) 20190213 - HCBBS Forum
67. What is the principle behind using a differential pressure level gauge to measure the level of volatile or condensable fluids in an isolation tank? - HCBBS Forum
68. Selection and installation requirements and methods for thermocouples and thermal resistors agree - HCBBS Forum
69. Abnormally high pressure at the pump outlet in the tank area; seeking online assistance - HCBBS Forum
70. May Q235B be used for highly hazardous and extremely hazardous media? Which standard specifies the criteria for selecting media and materials? - HCBBS Forum
71. [Daily Question] Basic Process Knowledge (True/False Questions) 20190403 - HCBBS Forum
72. Is there a lot of condensation water generated at the user end from the pipeline steam? ! - HCBBS Forum
73. Installation location of high and low liquid level alarms for fuel tank at gas stations - HCBBS Forum
74. Butterfly valve installed in reverse - HCBBS Forum
75. Explained thoroughly! 168-page high-quality PPT on gear mechanisms – a must-read for robotics enthusiasts! - HCBBS Forum
76. How should pressure testing and purging be carried out after the low-pressure steam pipeline is installed? ? Are there any regulations? - HCBBS Forum
77. What is the difference between plasma and ionization? ! - HCBBS Forum
78. Specifications for purging crude oil (fuel oil) storage tanks - HCBBS Forum
79. Seeking guidance - HCBBS Forum
80. Seeking acrylic process package, - HCBBS Forum
81. I would like to know: when using gas to push water out of the pipeline from the bottom of the storage tank, it’s important that too much gas doesn’t enter the pipeline. What control solutions are available? - HCBBS Forum
82. 【Daily Question】【AC Version for Static Equipment...Question 45】February 14, 2019 – True/False Question...Everything is going well - HCBBS Forum
83. Acetonitrile water removal methods or equipment? - HCBBS Forum
84. Seeking a teacher with practical experience in continuous distillation design - HCBBS Forum
85. 【Daily Question】【Static Equipment AC Version...Question 01】 January 1, 2019 – True/False Multiple Choice Question......Question released on New Year’s Day - HCBBS Forum
86. How are short-term, medium-term, and long-term shutdowns in chemical plants classified? - HCBBS Forum
87. Process pipelines and instrumentation diagrams for exhaust fans and blower units - HCBBS Forum
88. I want to use evaporation to remove salt, and I want to use a membrane to concentrate it first. What is the general limit of salt concentration entering the membrane? - HCBBS Forum
89. Dear experts, seeking advice on the industrial application of processes for removing COS, CS2, sulfides, and thiophenes from natural gas - HCBBS Forum
90. Bromine-free technology - HCBBS Forum
91. Will stainless steel be corroded when used for the metal strip of wound gaskets? - HCBBS Forum
92. Code for Building Design 4.2.2 and Code for Building Design 4.2.3 - HCBBS Forum
93. [Daily Question] Basic Process Knowledge (True/False) 20190305 - HCBBS Forum
94. 【Daily Question】 【AC Version for Static Equipment...Question 87】 March 28, 2019 – Revised multiple-choice questions...Everything is going well - HCBBS Forum
95. Combined unit or separate unit in the tank farm? - HCBBS Forum
96. [Daily Question] [Static Equipment Exchange Edition...Question 102] Adapted multiple choice question on April 12, 2019...all the best - HCBBS Forum
97. Is a equipment layout diagram used for civil engineering construction, or is there a separate dedicated diagram for the layout of equipment foundations? - HCBBS Forum
98. Funding is allocated to specialties such as electrical instrumentation design; what do primary funding and secondary funding refer to respectively? - HCBBS Forum
99. I have a question regarding the design of a styrene storage tank; I hope experts can help answer it. - HCBBS Forum
100. Reaction of glycerol with chlorine - HCBBS Forum