Waste heat boiler using heat pipes for gas generation

Thread Content

The heat-pipe waste heat boiler is a gas-water heat exchanger primarily used for recovering the sensible heat from the ascending and descending semi-water gas in the gas production section of fertilizer plants, thereby generating low-pressure saturated steam as a by-product. I. Equipment structure and working principle: This product is mainly composed of an inner cylinder, an outer cylinder, and heat pipes; the heat pipes are welded obliquely onto the wall of the inner cylinder. During operation, semi-water gas flows between the inner and outer tubes, while water flows inside the inner tube; heat transfer between the semi-water gas and water is achieved through heat pipes. II. Product features: 1. The heat pipe is welded to the inner tube wall at a single pivot point, allowing it to expand and contract freely without being constrained, thus preventing stress-induced damage. 2. By taking advantage of the ability of heat pipes to control wall temperature, the corrosion of equipment caused by semi-water gas is mitigated. 3. Operation with a single heat pipe: the failure of one or some heat pipes does not affect the normal operation of the equipment. 4. Both fluids involved in heat exchange flow outside the tubes, and the heat pipe can be finned. 5. The equipment has low fluid resistance, high heat exchange efficiency, and a compact structure. III. Instructions for use: (Note: It is strictly prohibited to operate this device without water supply; otherwise, the heat pipes may burst.) 1. In the design of the gas production process, it is necessary to take into account the treatment of semi-water gas before it enters this device. A cyclone dust collector should be used for dust removal, with a dust removal efficiency of over 85%, in order to ensure optimal performance of this device and extend its service life. 2. Ensure that the temperature does not rise too high when replacing the gas in the equipment during startup and shutdown. 3. Before putting the equipment into operation, it is necessary to read the drawings carefully to understand the technical specifications of the equipment (design pressure, temperature, fluid type, medium, etc.). Based on these technical parameters, verify one by one whether the process parameters of the gaseous or liquid substances connected to this equipment are consistent. 4. Before initial operation, the inner cylinder must first be filled with the process fluid or steam specified in the technical specifications, before the heat medium is introduced, to prevent tube rupture. 5. During the operation of the equipment, all relevant standards must be strictly followed, and overpressure is strictly prohibited. The semi-water gas entering this equipment should be at ≤450°C. If, due to production requirements, the type of coal used changes and as a result the temperature of the gas at the inlet and outlet exceeds the specified operating temperature, please contact our factory promptly to avoid unnecessary losses. 6. When the equipment needs to be stopped for some reason, it is necessary to first turn off the heat source—water or gas, and then turn off the cold source—soft water or steam. Operation is strictly prohibited when there is a lack of water or steam, while the heat source is still functioning properly. 7. Before introducing inert gas into the system, the inner cylinder of this equipment should first be filled with water, and then inert gas should be introduced. 8. When parking in winter, completely drain the process water and condensate from the equipment to prevent the heat pipes from being damaged by freezing.