English — Forum #337 (Page 2/163)

1. Sodium fluoride, sodium nitrate, 500-1000 ppm, at room temperature, with a alkalinity of 3-4%, can carbon steel be used? - HCBBS Forum
2. What temperature of chilled water is required to cool dichloromethane waste gas? - HCBBS Forum
3. Liquid chlorine storage tank outlet isolation valve - HCBBS Forum
4. Overused phrase: design pressure of nitrogen-sealed tanks - HCBBS Forum
5. Help, urgently! ! ! - HCBBS Forum
6. May I ask, the cooling circulating water is used to regulate the temperature of the condensate; should the control valve be installed on the inlet pipe or the return pipe of the circulating water? - HCBBS Forum
7. Process safety relief design - HCBBS Forum
8. The inlet temperature of the circulating water is higher than the ambient air temperature in spring, autumn, and winter – how can it then serve a cooling purpose? - HCBBS Forum
9. 【Mechanical Equipment Technology Edition】Daily Question 201805028: Refrigeration Systems — Refrigeration Parameters (2) - HCBBS Forum
10. What line types are used when drawing construction drawings? - HCBBS Forum
11. Looking for recommended domestic companies that are good at the design, processing, and manufacturing of tubular reactors - HCBBS Forum
12. How to verify equipment with incomplete penetration in the longitudinal welds of cylinder welding - HCBBS Forum
13. What is the current production process for cresol in China? - HCBBS Forum
14. Does anyone know the reason why the slurry used for flue gas desulfurization and denitration in ammonia-based catalytic cracking turns red? - HCBBS Forum
15. I need a process flow diagram for the ethylene hydration process, preferably with control points indicated - HCBBS Forum
16. 【Ten Years of Rapid Development in Chemical Equipment】The 1,000-ton modular flexible ammonia synthesis plant developed by the Energy Research Institute was successfully commissioned between 2064 and 2024 - HCBBS Forum
17. Applications of triethyl orthoformate - HCBBS Forum
18. When salts dissolve in water, is it necessary to use a bottom-settling tank? Is a flat-bottomed container sufficient? - HCBBS Forum
19. Confused! Help! Issues regarding the nitrogen seal pressure and saturated vapor pressure of ammonia storage tanks - HCBBS Forum
20. Issues regarding the classification and calculation of acute toxicity of media - HCBBS Forum
21. Daily Question ---------- True or False Questions on Basic Process Knowledge (January 4) - HCBBS Forum
22. 【Standard Communication Version--One Question per Day】20170817 - HCBBS Forum
23. Is the Ergun equation for calculating the pressure drop in a catalyst bed correct? ! - HCBBS Forum
24. Zero emissions - HCBBS Forum
25. Could you recommend any manufacturers that produce high-quality air coolers (finned coolers)? - HCBBS Forum
26. What is the minimum reactor diameter below which manholes cannot be installed on the head? - HCBBS Forum
27. Can a firewall reduce the fire separation distance? - HCBBS Forum
28. May I ask that the process should provide logic relationship conditions and interlock conditions to the automatic control system; what standards should be followed when drawing this logic diagram? - HCBBS Forum
29. (Information Sharing) Chemical Process Engineering - HCBBS Forum
30. Some knowledge about valves (I) - HCBBS Forum
31. What is the typical ethylene conversion rate in the gas-phase fluidized-bed polyethylene polymerization process? - HCBBS Forum
32. How can dimensions be annotated in bulk for the system diagrams (axonometric views) generated by Tianzheng for water supply and drainage systems? - HCBBS Forum
33. 【HVAC Version】Daily Question 20171212 - HCBBS Forum
34. In the nickel-cobalt extraction unit, what is the typical O/A ratio for a single stage? (Not always the O/A ratio) - HCBBS Forum
35. Air flow calculation - HCBBS Forum
36. Thoughts on Reading “Chemical Process Design” III – Separation - HCBBS Forum
37. Seek experts to examine the diagram and identify the problems! - HCBBS Forum
38. The origin of printers - HCBBS Forum
39. Seeking advice on tank material issues - HCBBS Forum
40. 【Ten Years of Rapid Development in Chemical Equipment】From 2017 to 2024, significant breakthroughs were achieved in the research, development, and application of technologies related to the production of aromatic hydrocarbons from diesel through adsorption, as well as the downstream utilization of these aromatic hydrocarbons by CNPC - HCBBS Forum
41. The brine contains free chlorine - HCBBS Forum
42. For a batch mixing tank with continuous feeding, how to ensure accurate concentration ratios - HCBBS Forum
43. Online switching of turbine-driven centrifugal compressors - HCBBS Forum
44. 【Mechanical Equipment Technology Edition】Daily Question 20171114: Lubrication System of Screw Compressor Units (4) - HCBBS Forum
45. HTRI finned heat exchanger - HCBBS Forum
46. Barium oxide production process - HCBBS Forum
47. Why are metal pipes used for pipelines that transport flammable and explosive gases, while gas extraction pipes in coal mines are made of non-metallic materials... - HCBBS Forum
48. What is the definition of heavy hydrocarbons? - HCBBS Forum
49. The issue of temperature changes when feeding propane into the distillation tower - HCBBS Forum
50. Steam volume calculation - HCBBS Forum
51. Issues with mating flanges for ceramic-lined pipelines - HCBBS Forum
52. Construction of chemical plant projects - HCBBS Forum
53. I have a question about azeotropy - HCBBS Forum
54. How is liquid ammonia loaded and unloaded? - HCBBS Forum
55. The blind panel has secondary lines. Can this blind panel still be absolutely isolated? - HCBBS Forum
56. What does it mean to add vanadium pentoxide to the desulfurization solution? - HCBBS Forum
57. Heat exchanger selection - HCBBS Forum
58. What type of steel is resistant to corrosion when using 4% hydrochloric acid (with the remainder being water), at a temperature of 20–50°C? - HCBBS Forum
59. Does liquid ethane belong to the category of petroleum and natural gas? What are the relevant classification criteria? - HCBBS Forum
60. 【Frontiers of HaiChuan Technology】Chinese scientists develop a new method for synthesizing adipic acid - HCBBS Forum
61. [Daily Question] Basic Process Knowledge (True/False Questions) 20191122 - HCBBS Forum
62. Reciprocating compressor inlet - HCBBS Forum
63. Are manual valves required before and after the belt-type fan in exhaust gas treatment? Same as for pump inlet and outlet - HCBBS Forum
64. Purpose of chemical engineering design - HCBBS Forum
65. Class A tank area air dryer principle - HCBBS Forum
66. 0.3 micron molecular sieve filtration and washing - HCBBS Forum
67. Alcohol distillation - HCBBS Forum
68. A letter from a security professional to his wife - HCBBS Forum
69. Venting at the top of the steam pipeline - HCBBS Forum
70. Energy savings in electrically heated heat transfer oil furnaces - HCBBS Forum
71. [Daily Question] Basic Process Knowledge (Multiple Choice) 20190923 - HCBBS Forum
72. A brief analysis of the key elements in the synthesis process of active pharmaceutical ingredients - HCBBS Forum
73. The confusion of Jianbei Design North - HCBBS Forum
74. Interlock settings for the waste heat boiler downstream of the ammonia synthesis tower in ammonia synthesis plants - HCBBS Forum
75. Fan inlet pressure - HCBBS Forum
76. Calculations related to drying rooms - HCBBS Forum
77. 【Piping Valve Technical Edition – Daily Question on Common Piping Errors – Piping Design for Thermometers】20170825 - HCBBS Forum
78. Is it dangerous to use gas heating or electric heating? What should I do? - HCBBS Forum
79. Phosphoric acid concentration - HCBBS Forum
80. Oil and gas recovery, adsorption, activated carbon - HCBBS Forum
81. Throttle orifice plates and orifice plate flow meters in the basic pump unit mode - HCBBS Forum
82. May I ask, when installing a pH meter on a storage tank, should it be installed at the top or on the side? ? ? - HCBBS Forum
83. I would like some advice regarding the problem of explosive polymers in dibutylene production (NMP method) - HCBBS Forum
84. Post on the distribution of wealth rewards for Process Area in December 2019 - HCBBS Forum
85. Steam and water heat transfer coefficients - HCBBS Forum
86. 【Process Area Event – Bizarre Designs – 11】-- Problem with the control valve bypass - HCBBS Forum
87. Compressed heat regeneration adsorption dryer - HCBBS Forum
88. May I ask whether it is better to build a 30-cubic-meter hydrochloric acid storage tank in an upright or horizontal configuration? - HCBBS Forum
89. Safety Valve Calculation Table - HCBBS Forum
90. Centrifuge - HCBBS Forum
91. PID problem - HCBBS Forum
92. Method for determining the inspection ratio of pressure pipelines - HCBBS Forum
93. Is there such a belt filter press? - HCBBS Forum
94. For trenches, should sump pits be installed, and should they be filled with fine sand? - HCBBS Forum
95. What is a good method for solvent dehydration? - HCBBS Forum
96. The China Association for Science and Technology has announced key scientific and technological challenges for 2025, with several projects in the field of chemistry and chemical engineering selected - HCBBS Forum
97. How do you bring in and take out the large equipment in the factory building? Enter through the door? From the top of the factory building? - HCBBS Forum
98. “Becoming an Excellent Process Engineer” --1--- “How to Become an Excellent Engineer?” ” - HCBBS Forum
99. Dry gas, propane-based hydrogen production - HCBBS Forum
100. What caused the pump to stop? - HCBBS Forum