English — Forum #337 (Page 32/163)

1. How can automatic oil-water separation be achieved for substances such as dichloromethane, acetic acid, benzene, and water within the same system? - HCBBS Forum
2. Low-temperature gasket - HCBBS Forum
3. What are the problems with choosing a larger diameter for the mesh mist eliminator at the top of the spray tower? What are the effects of too low an operating gas velocity? - HCBBS Forum
4. "Heat Pump Technical Manual" Share - HCBBS Forum
5. Can exhaust pipe installations take on a π shape, or what’s known as an inverted U shape, or a U-shaped form? - HCBBS Forum
6. What is full vacuum distillation? - HCBBS Forum
7. Claim the download link for Aspen V14 - HCBBS Forum
8. Production of hydrogen sulfide from hydrogen sulfide - HCBBS Forum
9. Can EO and PO storage tanks be located in the same tank farm? - HCBBS Forum
10. sodium persulfate - HCBBS Forum
11. Catalysis/Catalytic cracking/Catalytic pyrolysis - HCBBS Forum
12. Regarding the issue of measuring steam and liquids with differential pressure flow meters? - HCBBS Forum
13. For adjusting the pH in applications requiring large volumes of water, a relatively high level of precision is needed. However, building water tanks is too costly and there’s no suitable location for them. Is there any better solution? - HCBBS Forum
14. For a tower with a plastic lining made of steel, methanol or ethanol is used; how should the static electricity from this tower be discharged? What measures can be taken to prevent static electricity? - HCBBS Forum
15. Volume conversion - HCBBS Forum
16. Catalyst selection for the reaction of aniline with ethanol - HCBBS Forum
17. Motor class II energy efficiency, pipe thread connections – what do pipe thread connections mean? Why this format? - HCBBS Forum
18. Compiled Version of Examination Guidelines for the Chemical Engineering Major - HCBBS Forum
19. Polyurethane - HCBBS Forum
20. Why cannot Class B liquid materials be transported directly from the facility to the loading station for immediate loading? Is it necessary to go to the tank area first before sending it to the loading station? Is there a regulatory basis? - HCBBS Forum
21. Does liquid carbon dioxide vaporize after being buried underground? - HCBBS Forum
22. Chemical engineering PDF single-line diagram materials - HCBBS Forum
23. Saturated gas moisture content - HCBBS Forum
24. Steam outer tube, tube support - HCBBS Forum
25. May I ask under what circumstances is a handwheel necessary for a control valve? Are there any regulations specifying that it must be installed in certain situations? - HCBBS Forum
26. What type of flow meter offers good cost-performance for measuring flow rates in the range of several thousand cubic meters per hour, for use in waste gas adsorption? - HCBBS Forum
27. Polypropylene by-products - HCBBS Forum
28. What is the distance between the device’s power distribution room and the factory fence? - HCBBS Forum
29. How can the amount of waste gas generated by the vacuum pumps in a chemical plant be calculated accurately? - HCBBS Forum
30. There is a problem: given the saturated vapor pressure at a certain temperature, and knowing that it is carried away by purging with dry air at atmospheric pressure, how can its concentration be determined? - HCBBS Forum
31. Do gas boilers belong to open-flame equipment? - HCBBS Forum
32. Are MVR evaporation and heat pump evaporation the same thing? What is the relationship between them? Can’t figure it out - HCBBS Forum
33. How can I determine if there is flow deviation inside a packed adsorption tower? - HCBBS Forum
34. Reformed cycle hydrogen - HCBBS Forum
35. Description of the equipment material - HCBBS Forum
36. Calculation of comprehensive energy consumption for circulating water - HCBBS Forum
37. Organic waste gas is purified through adsorption treatment; a fan with a flow rate of 2000 and a pressure rating of 4000 Pa is selected. Why is the actual flow rate only around half of that, and unable to reach the desired level? - HCBBS Forum
38. Difference between TRIM.5or5A-HF and TRIM.8or8A-13Cr+HF - HCBBS Forum
39. Discussion on naphtha distillation units - HCBBS Forum
40. What kind of pump is suitable for the biochemical nitrogen removal mixed liquid reflux pump? Where should the aerobic effluent mixture be drawn from? - HCBBS Forum
41. If the total pressure selected for the fan is too high, will both the negative pressure in front of the fan and the pressure behind it increase? - HCBBS Forum
42. What does \"explosion-proof throat\" for fans mean? - HCBBS Forum
43. Are there parameters for the density of toluene at its saturated vapor pressures at different temperatures? - HCBBS Forum
44. Judgment of pressure pipelines - HCBBS Forum
45. The protrusion on the valve and its purpose - HCBBS Forum
46. Problems with atmospheric distillation and nitrogen sealing - HCBBS Forum
47. The top pressure of the distillation column can be maintained stably, but the reflux temperature increases as the temperature of the circulating water rises, resulting in an increase in the pressure difference across the column. - HCBBS Forum
48. The melamine project uses multiple sets of multi-stage piston-fed centrifuges - HCBBS Forum
49. I would like to ask why the tank connected below the condenser downcomer is designed to be a sealed tank - HCBBS Forum
50. Adding balls to the ball mill - HCBBS Forum
51. Which teacher has knowledge on the safety aspects of handling, transporting, and storing acrylics? - HCBBS Forum
52. Instructions for nitrogen closed-loop cycle drying of materials containing solutes - HCBBS Forum
53. Are there any relatively successful chemical industrial parks in China? - HCBBS Forum
54. A safety distance of 5 meters must be maintained between the hydrochloric acid and liquid alkali tanks. Should the height of the retaining wall be 1.2 meters? - HCBBS Forum
55. The equipment manufacturing company provides the drawings to our unit; so how does our unit pass these drawings on to the client? - HCBBS Forum
56. Seeking help from experts! Saltwater and salt mud treatment - HCBBS Forum
57. Question: Do liquid ethylene oxide and propylene oxide belong to liquefied hydrocarbons? - HCBBS Forum
58. For 2 50-cubic-meter methanol storage tanks and 2 50-cubic-meter toluene storage tanks, what safety regulations and requirements must be met during their first operation? - HCBBS Forum
59. Pressure gauge for anhydrous hydrogen chloride medium - HCBBS Forum
60. 50 cubic meters dichloromethane storage tank - HCBBS Forum
61. What’s the difference between an evaporator and an evaporative crystallizer? - HCBBS Forum
62. What is the unit of ug.g-1, and how is it converted to mg/kg or ppm? - HCBBS Forum
63. How is safety intrinsically guaranteed in this system? - HCBBS Forum
64. Help: Polyethylene glycol process, does anyone have it? Thank you, expert! - HCBBS Forum
65. Experts, I have a question: what is the purpose of adding pressure boost pumps and surge tanks to the process of the freezing plant (chillers)? - HCBBS Forum
66. How to remove sediment that cannot be reached by the stirrer blade - HCBBS Forum
67. Why is the gas generation rate in the drum always greater than the water supply volume? - HCBBS Forum
68. Ask a chemistry question about the strength of metal reactivity - HCBBS Forum
69. Underwater combustion technology - HCBBS Forum
70. Since the complete set of equipment involves pressure pipelines, is specialized qualification required for the design and installation of these pipelines? - HCBBS Forum
71. Can the manufacturer not produce pH meter probes and displays that are explosion-proof? How do you use pH meters in explosive environments? - HCBBS Forum
72. Statistics on nitrogen consumption in the factory area - HCBBS Forum
73. Is it valid if this type of technical stamp is applied to the drawing without a signature? What are the risks? - HCBBS Forum
74. Should constant-pressure or constant-volume specific heats be used to calculate the heat capacity of a heat exchanger? - HCBBS Forum
75. Rubber corrosion data - HCBBS Forum
76. Can a turbine flow meter measure the flow rate of methanol and ethanol at 45 degrees? - HCBBS Forum
77. Which are the brands that perform well in RTO? - HCBBS Forum
78. Seek Reppe process package for propionic acid production - HCBBS Forum
79. What design books should a beginner in the chemical industry read? - HCBBS Forum
80. I have been in this field for 14 years; recently I’ve been feeling unwell and was diagnosed with severe hair loss. I plan to - HCBBS Forum
81. How to calculate the production of bisphenol A - HCBBS Forum
82. Friends, who has a flowchart of the industrial production process for nylon 1212? - HCBBS Forum
83. What are the commonly used spare parts listed in the bid, such as pumps, containers, etc.? How many are in stock? Are there any regulatory requirements? - HCBBS Forum
84. What are the specifications for the range of pipe diameters covered by the welding procedure qualification for pipes? - HCBBS Forum
85. Are there any masters of processes for regenerating base oil from waste engine oil? - HCBBS Forum
86. What should be done with the valves on high-pressure welded pipelines during pressure testing? - HCBBS Forum
87. Why is the liquid level unstable in the tower for acid water single-column air stripping? - HCBBS Forum
88. In the explosion protection rating Ex tD A21 IP66 T135℃ for instruments, what does tD A21 mean? - HCBBS Forum
89. Design calculation and software simulation techniques for plate-fin heat exchangers - HCBBS Forum
90. Will switching the U-tube affect the fluidization state of the acrylonitrile reactor? - HCBBS Forum
91. Construction sequence for leakage test and purging - HCBBS Forum
92. Determination of operating pressure in pipeline data sheets - HCBBS Forum
93. In which sources can I find the pH range at which precipitation of ions begins, as mentioned by experts? I checked the inorganic chemistry textbooks, but it wasn’t there. - HCBBS Forum
94. Does the calculation of the flow rate for a circulating water pump need to take into account the temperature drop along the pipeline? - HCBBS Forum
95. How to reduce free ammonia - HCBBS Forum
96. ANSI/American ASTM Standard Catalog Search - HCBBS Forum
97. 【Ten Years of Great Progress in Chemical Technology】The green and low-carbon process for producing acetylene by using barium carbide as a substitute for calcium carbide coal, 279–2023 - HCBBS Forum
98. There are parallel pipelines at the pump outlet; how should the pump head be calculated? - HCBBS Forum
99. How to determine the optimal process control points - HCBBS Forum
100. The role of quartz sand in the hydration reactor - HCBBS Forum