English — Forum #337 (Page 23/163)

1. YM coal ash gasification furnace gasification technology - HCBBS Forum
2. Sharing of the performance experience of MVR steam compressors - HCBBS Forum
3. How to extract hexamethylenediamine from wastewater containing it - HCBBS Forum
4. What software is good for creating animation simulations? - HCBBS Forum
5. On PID diagrams, how are interlocks such as SIS and ESD, as well as system control and shutdown functions, represented? Are there any examples? - HCBBS Forum
6. May I ask if 316L material can be used for 5% PAC solutions in water treatment? Can you endure it? - HCBBS Forum
7. How to choose the addition rate for the esterification reaction - HCBBS Forum
8. 7. For a single-acting valve, if the solenoid valve loses power but air supply continues, will the solenoid valve return to its original position? - HCBBS Forum
9. 【Survey results available】Accident analysis of hazardous chemicals enterprises: Primary causes account for approximately 58.82% - HCBBS Forum
10. Selection of insulation materials: aluminum silicate and perlite - HCBBS Forum
11. Reaction with water involved, reduced energy consumption - HCBBS Forum
12. Composite insulation - HCBBS Forum
13. How should the boiler water drainage system of a negative pressure steam generator be designed in a reasonable manner? - HCBBS Forum
14. What elements should a proper equipment assembly diagram include? Things such as a material list, pipe connection details, technical specifications, etc. – the more comprehensive, the better - HCBBS Forum
15. Industrial deoxygenation methods for organic solvents - HCBBS Forum
16. Analysis of the fluorine chemical industry: sealed sampling - HCBBS Forum
17. Is a qualification required to clean sludge from anaerobic tanks? What are the requirements? - HCBBS Forum
18. Is it necessary to install a safety valve behind the chlorine compressor in chlor-alkali production? - HCBBS Forum
19. What do MTR and VFD mean for pumps or fans on a PID flow diagram? - HCBBS Forum
20. Should the solenoid voltage for pneumatic valves be 24V or 220V? - HCBBS Forum
21. For 3,000 m3/h of waste gas, what concentration can be achieved using water spraying for methanol, ethanol, **furan, benzene, toluene, etc.? - HCBBS Forum
22. How is the volume of the circulation tank at the bottom of the spray tower determined? By duration of stay? - HCBBS Forum
23. Addition of natural gas blending to the torch gas pipeline - HCBBS Forum
24. What type of valve is generally suitable for draining pipes? - HCBBS Forum
25. Does plate heat exchanger not have a non-condensable gas outlet? How to remove non-condensable gas? - HCBBS Forum
26. For steel atmospheric pressure vessels where the medium is extremely hazardous, are there any requirements regarding the pressure rating of manholes? - HCBBS Forum
27. Gentle experts, is it necessary to use a crane pipe for unloading carbon dioxide? - HCBBS Forum
28. Differences in applicable operating conditions among hot-pressed tees, forged tees, and welded tees - HCBBS Forum
29. Should a nitrogen-sealed tank be equipped with an emergency breathing manhole or an emergency pressure relief manhole? - HCBBS Forum
30. Hainan advances the development and construction of offshore wind power projects - HCBBS Forum
31. Production process of antimony mercuric oxide and related knowledge - HCBBS Forum
32. Seeking cooperation for chlorine chlorination equipment - HCBBS Forum
33. The problem of easy evaporation in siphon reboilers - HCBBS Forum
34. Polyethylene-polypropylene composite sheets are used to prevent moisture in insulated pipes - HCBBS Forum
35. We sincerely invite partners or referers of chemical projects across the country - HCBBS Forum
36. Technology for directly capturing CO2 from the air - HCBBS Forum
37. What are the maximum temperature and pressure tolerances of the pH meter? What types of pollution and corrosion are most harmful to electrodes? - HCBBS Forum
38. Process - HCBBS Forum
39. Is it feasible to install 14 pumps on the floor? - HCBBS Forum
40. Does anyone know when it is necessary to install two remote level gauges? - HCBBS Forum
41. Seeking purchase of ethyl silicate process package - HCBBS Forum
42. PTA oxidation reaction - HCBBS Forum
43. Is it feasible to place oxygen cylinders and liquefied petroleum gas cylinders in the same building but in different fire compartments? - HCBBS Forum
44. Do you know anything about Sinopec Luoyang Technology R&D Center? - HCBBS Forum
45. Is there a basis for shutting down pipelines due to natural gas leaks? - HCBBS Forum
46. Where are the gases released by the safety valves, rupture discs, and pressure relief manholes in your chemical plant discharged to? Can it be released into the atmosphere? - HCBBS Forum
47. Flue gas recovery measures for yellow phosphorus electric furnaces - HCBBS Forum
48. Questions regarding LNG cryogenic tanks - HCBBS Forum
49. For transporting flammable solvents, what is the typical flow rate in the outlet pipeline of a centrifugal pump? - HCBBS Forum
50. Is it necessary to insulate the outside of the circulating water and 7-degree water, as well as the cryogenic brine condenser equipment at minus 15 degrees? - HCBBS Forum
51. Do buried pressure vessels, as special equipment, require sand removal for annual inspections? - HCBBS Forum
52. May I ask: where can I buy the printed versions of \"Appendix to HG 20559\" and \"HG 20570\"? - HCBBS Forum
53. Selection between downward and upward movement of the stirrer blade - HCBBS Forum
54. Is it required that methanol be heated using a heat exchanger, and are there any rules against using steam as a heat source? - HCBBS Forum
55. For the same processing volume Q, what are the advantages of series adsorption compared to parallel adsorption mode for two towers (with the same adsorbent)? - HCBBS Forum
56. MS resin - HCBBS Forum
57. Is the nitrogen storage tank equipped with a breathing valve to allow air to be sucked in when the negative pressure is too low? Or can it only call one way? - HCBBS Forum
58. What are the standards for carrying out pipeline blasting and purging? - HCBBS Forum
59. How can dust generation be avoided when adding powdered activated carbon? Does your factory have any good methods? - HCBBS Forum
60. Various fire protection codes - HCBBS Forum
61. Are there any standard specifications in place to regulate the fiberglass ducts, PP ducts, or stainless steel ducts used for exhaust gases? - HCBBS Forum
62. Are there any specifications regarding the size of the built-in coils for heating or cooling? - HCBBS Forum
63. Regarding the fire hazard classification of heat transfer oil furnaces - HCBBS Forum
64. Fine chemical projects seeking cooperation - HCBBS Forum
65. Structure or valve to prevent overfilling - HCBBS Forum
66. What should be the wall thickness and pressure rating of the stainless steel ducts used for VOC waste gas? What pressure rating is used for the air valve? - HCBBS Forum
67. Filter screen format - HCBBS Forum
68. Why is the head of a reciprocating pump unlimited? - HCBBS Forum
69. Installation of flame arresters in storage tanks - HCBBS Forum
70. Refining of crude phosphorus - HCBBS Forum
71. Can a pneumatic diaphragm pump operate without load or under pressure for a long time? - HCBBS Forum
72. What is the current market price of DMC? - HCBBS Forum
73. Seeking advice - HCBBS Forum
74. Is a pH meter effective in an air-stirred tank? Will the probe break down frequently? - HCBBS Forum
75. Requirements for on-site manual operation of emergency shut-off valves at the inlets and outlets of storage tanks in the tank farm - HCBBS Forum
76. What is the highest concentration of ammonia solution that can be obtained from the ammonia nitrogen in wastewater, after it has been removed using a stripping tower? What is the highest concentration that sulfuric acid an can be made at? - HCBBS Forum
77. Can a pressure reducing valve for compressed air reduce the pressure from around 0.6 to 0.08 MPa instantly? - HCBBS Forum
78. Measures for environmental management in the factory area - HCBBS Forum
79. Separation of hydrogen chloride and sulfur dioxide from exhaust gases by controlled water absorption method - HCBBS Forum
80. Is it necessary to install a minimum flow valve on the recirculation pipe at the outlet of the feed water pump? - HCBBS Forum
81. Which expert can recommend a book on the butyl alcohol production process? - HCBBS Forum
82. Can a pressure relief valve be installed on a riser? - HCBBS Forum
83. Electronic version of the selection guide for piping materials in process piping specialties - HCBBS Forum
84. Is it necessary to install a manual valve in front of the breather valves of Class A and B storage tanks? Is there a regulatory basis? - HCBBS Forum
85. Reuse of drain water from the hydrogen production drum - HCBBS Forum
86. Discussion on fire separation distances between Class A factories under petrochemical regulations? - HCBBS Forum
87. How many tons of hydrogen peroxide tanks are needed in Class A workshops, and they should be enclosed with barriers; does the design institute say this doesn’t comply with the regulations? What doesn’t fit? - HCBBS Forum
88. What is the principle behind the use of a water seal for hydrochloric acid absorption? How to prevent water from returning to the hydrochloric acid tank? - HCBBS Forum
89. Ratio of non-destructive testing for welds in ethyl acetate storage tanks at atmospheric pressure - HCBBS Forum
90. Atmospheric pressure storage tank exhaust system - HCBBS Forum
91. Environmental engineers are looking for a job - HCBBS Forum
92. How are the burst discs on organic waste gas treatment pipelines and equipment calculated? How many should be set per one? Are there any guidelines? - HCBBS Forum
93. Please help me figure out what’s going on here - HCBBS Forum
94. Toxic liquid storage tanks and flammable liquid storage tanks are arranged in groups - HCBBS Forum
95. If the safety valve is to be sent for calibration, does it need to be fitted with a valve that shuts it off in front of the safety valve on the equipment? - HCBBS Forum
96. What is the startup sequence for the adsorption fan used to handle exhaust gases when it is started for the first time? How to protect fans? - HCBBS Forum
97. What do the valve numbers KV and XV on the PID diagram mean? - HCBBS Forum
98. Refilling of fire water tanks - HCBBS Forum
99. The pressure in the exhaust gas is around 2-5 Kpa. What pressure value is appropriate for selecting butterfly valves and other piping components in this case? - HCBBS Forum
100. What is the flow rate of the DN25 electromagnetic flowmeter? - HCBBS Forum