Prize-winning Quiz on Coal Chemical Engineering Knowledge 12

1. The valve that is not suitable for regulating fluid flow and transporting particulate materials is (B). A. Globe valve B. Gate valve C. Ball valve 2. In a tubular heat exchanger, the most common fluid flow direction is (A). A. Counterflow B. Cross-flow C. Co-current. 3. For containers containing toxic, flammable substances, or those that can pollute the environment, a (A) safety valve should be used. A. Fully enclosed type B. Semi-enclosed type C. Open type 4. The setting pressure of the safety valve on a pressure vessel should be (A) the design pressure of the vessel. A. Less than B. Equal to C. Greater than 5. What is the function of the torch system? Function of the torch: (1) It is a safety measure to ensure the safe operation of the plant, allowing for the timely ignition of any emissions in the event of an accident. (2) It is a special combustion facility used to deal with flammable and flammable toxic gases that cannot be collected and reprocessed by devices; it represents an environmental protection measure aimed at reducing air pollution and improving the surrounding environment. (3) The treatment method involves converting flammable and flammable toxic gases and vapors into non-flammable inert gases, as well as transforming harmful, malodorous, and toxic substances into harmless, odorless, and non-toxic substances before releasing them. This post was last edited by Ma Hai on 2009-4-12 at 14:14.]

1. The valve that is not suitable for regulating fluid flow and transporting particulate materials is (B). B. Globe valve 2. In shell and tube heat exchangers, the most common fluid flow direction is (A). A. Backflow 3. For containers whose internal contents are toxic, flammable, or environmentally harmful, (A) safety valves should be used. A. Fully enclosed type 4. The setting pressure of the pressure vessel safety valve should be (A) the design pressure of the vessel. A. Less than 5. What is the function of the torch system? In chemical production, there are the following flare gases: (1) Process gases discharged by pressure control valves during system pressure adjustment ； 　　(2) Leaks in the plant system, such as leaks in valves and safety valves connected to the flare system ； 　　(3) Flammable and explosive materials that must be released during the production process ； 　　(4) Gases released from towers, spherical tanks, containers, etc. 　　If the flare gas mentioned above is not recovered but released directly into the atmosphere, it not only results in economic losses for the enterprise; moreover, since flare gas is often flammable, toxic, and corrosive, failing to burn it to form harmless or less toxic compounds will cause environmental pollution. The function of the flare system is to burn the flare gas into harmless or less toxic compounds, thereby reducing environmental pollution

1. B. Globe valve 2. A. Backflow 3. A. Fully sealed 4. A. Less than　

1. The valve that is not suitable for regulating fluid flow and transporting particulate materials is (C). A. Globe valve B. Gate valve C. Ball valve 2. In a tubular heat exchanger, the most common fluid flow direction is (A). A. Counterflow B. Cross-flow C. Co-current. 3. For containers containing toxic, flammable substances, or those that can pollute the environment, a (A) safety valve should be used. A. Fully enclosed type B. Semi-enclosed type C. Open type 4. The setting pressure of a pressure vessel’s safety valve should be (A) higher than the vessel’s design pressure. A. Less than B. Equal to C. Greater than 5. What is the function of the torch system? Function of the torch: (1) It is a safety measure to ensure the safe operation of the plant, allowing for the timely ignition of any emissions in the event of an accident. (2) It is a special combustion facility used to handle combustible and flammable toxic gases that cannot be collected and reprocessed by devices; it represents an environmental protection measure aimed at reducing air pollution and improving the surrounding environment. (3) The treatment method involves converting combustible and flammable toxic gases and vapors into non-combustible inert gases, as well as transforming harmful, malodorous, and toxic substances into harmless, odorless, and non-toxic substances before releasing them.

Functions of 1B, 2A, 3A, 4A flares: They are generally used by chemical enterprises to emit toxic, harmful, flammable, and explosive waste gases; such gases generated by the facilities can be converted through combustion into CO2, H2O, SO2, and NOx, which pose less hazard, before being released into the atmosphere. Due to energy-saving requirements, chemical plants generally have set the goal of eliminating flares in order to minimize the energy losses caused by flare combustion emissions.

1. The valve that is not suitable for regulating fluid flow and transporting particulate materials is (b). A. Plug valve B. Globe valve C. Gate valve 2. In a tubular heat exchanger, the most common fluid flow direction is (a). A. Counterflow B. Cross-flow C. Co-flow. 3. For containers whose internal contents are toxic, flammable, or harmful to the environment, a （a） safety valve should be used. A. Fully enclosed type B. Semi-enclosed type C. Open type 4. The setting pressure of the safety valve on a pressure vessel should be (a) higher than the design pressure of the vessel. A. Less than B. Equal to C. Greater than 5. What is the function of the torch system? Burning toxic, hard-to-recycle gases

1. The valve that is not suitable for regulating fluid flow and transporting particulate materials is (C). A. Globe valve B. Gate valve C. Ball valve 2. In a tubular heat exchanger, the most common fluid flow direction is (A). A. Counterflow B. Cross-flow C. Co-current. 3. For containers containing toxic, flammable substances, or those that can pollute the environment, a (A) safety valve should be used. A. Fully enclosed type B. Semi-enclosed type C. Open type 4. The setting pressure of a pressure vessel’s safety valve should be (A) higher than the vessel’s design pressure. A. Less than B. Equal to C. Greater than 5. What is the function of the torch system? It ensures that the exhaust gases generated by the production unit under various operating conditions such as startup, shutdown, normal operation, and accident situations can be vented for combustion in a timely, safe, and reliable manner.

1. The valve that is not suitable for regulating fluid flow and transporting particulate materials is (C). A. Globe valve B. Gate valve C. Ball valve 2. In a tubular heat exchanger, the most common fluid flow direction is (A). A. Counterflow B. Cross-flow C. Co-current. 3. For containers containing toxic, flammable substances, or those that can pollute the environment, a (A) safety valve should be used. A. Fully enclosed type B. Semi-enclosed type C. Open type 4. The setting pressure of a pressure vessel’s safety valve should be (A) higher than the vessel’s design pressure. A. Less than B. Equal to C. Greater than 5. What is the function of the torch system? It ensures that the exhaust gases generated by the production unit under various operating conditions such as startup, shutdown, normal operation, and accident situations can be vented for combustion in a timely, safe, and reliable manner.

1.b.2a.3a.4a Function of the flame: Of course, it is to ensure pressure regulation during startup and shutdown, to allow the safety valve to vent gas, and to prevent the gases released during these periods from contaminating the environment; after combustion, harmless gases are generated and vented.

1. The valve that is not suitable for regulating fluid flow and transporting particulate materials is (B). A. Globe valve B. Gate valve C. Ball valve 2. In a tubular heat exchanger, the most common fluid flow direction is (A). A. Counterflow B. Cross-flow C. Co-current. 3. For containers containing toxic, flammable substances, or those that can pollute the environment, a (A) safety valve should be used. A. Fully enclosed type B. Semi-enclosed type C. Open type 4. The setting pressure of the safety valve on a pressure vessel should be (A) the design pressure of the vessel. A. Less than B. Equal to C. Greater than 5. What is the function of the torch system? The function of the flare is to ensure that the off-gases generated by the production units under various operating conditions can be vented for combustion in a timely, safe, and reliable manner.

1. B 2. A 3. A 4. A 5. The function of the flare: (1) It is a safety measure to ensure the safe operation of the facility; it allows for the immediate ignition of any gases released in the event of an accident. (2) It is a special combustion facility used to deal with flammable and flammable toxic gases that cannot be collected and reprocessed by devices; it represents an environmental protection measure aimed at reducing air pollution and improving the surrounding environment. (3) The treatment method involves converting flammable and flammable toxic gases and vapors into non-flammable inert gases, as well as transforming harmful, malodorous, and toxic substances into harmless, odorless, and non-toxic substances before releasing them.

1. The valve that is not suitable for regulating fluid flow and transporting particulate materials is ( ). 2. In a shell-and-tube heat exchanger, the most common fluid flow direction is (A). 3. For containers that are toxic, flammable to the internal medium, or harmful to the environment, a (A) safety valve should be used. 4. The setting pressure of the safety valve on a pressure vessel should be (A) higher than the design pressure of the vessel. 5. What is the function of the torch system? The main function of the flare system is to safely ignite the non-recyclable toxic and flammable gases in the system at high altitudes, thereby protecting the environment. This post was last edited by eastnow on 2009-4-12 20:37.]

1. The valve that is not suitable for regulating fluid flow and transporting particulate materials is (B). B. Globe valve 2. In shell and tube heat exchangers, the most common fluid flow direction is (A). A. Backflow 3. For containers whose internal contents are toxic, flammable, or environmentally harmful, (A) safety valves should be used. A. Fully enclosed type 4. The setting pressure of the pressure vessel safety valve should be (A) the design pressure of the vessel. A. Less than 5. What is the function of the torch system? In chemical production, there are the following flare gases: (1) Process gases discharged by pressure control valves during system pressure adjustment ； 　　(2) Leaks in the plant system, such as leaks in valves and safety valves connected to the flare system ； 　　(3) Flammable and explosive materials that must be released during the production process ； 　　(4) Gases released from towers, spherical tanks, containers, etc. 　　If the flare gas mentioned above is not recovered but released directly into the atmosphere, it not only results in economic losses for the enterprise; moreover, since flare gas is often flammable, toxic, and corrosive, failing to burn it to form harmless or less toxic compounds will cause environmental pollution. The function of the flare system is to burn the flare gas into harmless or less toxic compounds, thereby reducing environmental pollution

1. The valve that is not suitable for regulating fluid flow and transporting particulate materials is (C). A. Globe valve B. Gate valve C. Ball valve 2. In a tubular heat exchanger, the most common fluid flow direction is (A). A. Counterflow B. Cross-flow C. Co-current. 3. For containers containing toxic, flammable substances, or those that can pollute the environment, a (A) safety valve should be used. A. Fully enclosed type B. Semi-enclosed type C. Open type 4. The setting pressure of a pressure vessel’s safety valve should be (A) higher than the vessel’s design pressure. A. Less than B. Equal to C. Greater than 5. What is the function of the torch system? In chemical production, there are the following flare gases: (1) Process gases discharged by pressure control valves during system pressure adjustment ； 　　(2) Leaks in the plant system, such as leaks in valves and safety valves connected to the flare system ； 　　(3) Flammable and explosive materials that must be released during the production process ； 　　(4) Gases released from towers, spherical tanks, containers, etc. 　　If the flare gas mentioned above is not recovered but released directly into the atmosphere, it not only results in economic losses for the enterprise; moreover, since flare gas is often flammable, toxic, and corrosive, failing to burn it to form harmless or less toxic compounds will cause environmental pollution. The function of the flare system is to burn the flare gas into harmless or less toxic compounds, thereby reducing environmental pollution

1. The valve that is not suitable for regulating fluid flow and transporting particulate materials is (C). A. Globe valve B. Gate valve C. Ball valve 2. In a tubular heat exchanger, the most common fluid flow direction is (A). A. Counterflow B. Cross-flow C. Co-current. 3. For containers containing toxic, flammable substances, or those that can pollute the environment, a (A) safety valve should be used. A. Fully enclosed type B. Semi-enclosed type C. Open type 4. The setting pressure of a pressure vessel’s safety valve should be (A) higher than the vessel’s design pressure. A. Less than B. Equal to C. Greater than 5. What is the function of the torch system? 1: It is a safety measure to ensure the safe operation of the device, allowing for the timely ignition of any emissions in the event of an accident. 2: It is a special combustion facility used to deal with flammable and flammable toxic gases that cannot be collected and reprocessed by devices; it represents an environmental protection measure aimed at reducing air pollution and improving the surrounding environment. 3: The treatment method involves converting flammable and flammable toxic gases and vapors into non-flammable inert gases, as well as transforming harmful, odorous, and toxic substances into harmless, odorless, and non-toxic substances before releasing them.

1. B 2. A 3. A 4. A Function of the flame: It is generally used by chemical enterprises to handle toxic, harmful, flammable, and explosive waste gases; it enables the conversion of such gases produced by the facilities into less hazardous substances such as CO2, H2O, SO2, and NOx, which can then be released into the atmosphere. Due to energy-saving requirements, chemical plants generally have set the goal of eliminating flares in order to minimize the energy losses caused by flare combustion emissions.

- 1. The valve that is not suitable for regulating fluid flow and transporting particulate materials is (B). B. Globe valve 2. In shell and tube heat exchangers, the most common fluid flow direction is (A). A. Backflow 3. For containers whose internal contents are toxic, flammable, or environmentally harmful, (A) safety valves should be used. A. Fully enclosed type 4. The setting pressure of the pressure vessel safety valve should be (A) the design pressure of the vessel. A. Less than 5. What is the function of the torch system? In chemical production, there are the following flare gases: (1) Process gases discharged by pressure control valves during system pressure adjustment ； 　　(2) Leaks in the plant system, such as leaks in valves and safety valves connected to the flare system ； 　　(3) Flammable and explosive materials that must be released during the production process ； 　　(4) Gases released from towers, spherical tanks, containers, etc. 　　If the flare gas mentioned above is not recovered but released directly into the atmosphere, it not only results in economic losses for the enterprise; moreover, since flare gas is often flammable, toxic, and corrosive, failing to burn it to form harmless or less toxic compounds will cause environmental pollution. The function of the flare system is to burn the flare gas into harmless or less toxic compounds, thereby reducing environmental pollution

The function of the B, A, A, A flares is to burn toxic and harmful substances generated during normal operations or accidents, thereby ensuring their safe and environmentally friendly emission

1、B 2、A 3、A 4、A 5、Safely ignite the non-recyclable toxic and flammable gases generated in the system at high altitudes to protect the environment.

1 B 2 A 3 A 4 A 5 The flame converts flammable, toxic, and corrosive gases into harmless or less toxic compounds through combustion, thereby protecting the environment