Integrated heat transfer equipment in natural gas hydrogen production system
A technology of heat exchange equipment and hydrogen production system, which is applied in the direction of lighting and heating equipment, indirect heat exchangers, etc., and can solve the problems of large number of heat exchange tubes, large footprint, waste, etc.
Pending Publication Date: 2018-12-04
四川创达新能科技有限公司
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Problems solved by technology
[0003] For small devices, more than 50% of the heat exchange tubes in the convection section of the flue gas are located in the insulation layer of the tube box, and do not directly contact the flue gas for heat exchange; in order to ensure the utilization rate of the flue gas heat, convection The heat exchange tubes in the section have the disadvantages of large number of heat exchange tubes, large area, high investment, and large area occupation.
[0004] In addition, in the existing scheme, the flue gas convection section will be equipped with a flue gas waste heat boiler to exchange the remaining flue gas heat with the boiler feed water, and the reformed gas will exchange heat with the boiler feed water through an independent reformed gas waste heat boiler, which causes Duplication and waste of equipment and resources
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[0019] The present invention will be described in more detail below in conjunction with the drawings.
[0020] reference figure 1 , The traditional natural gas hydrogen production process includes the following steps.
[0021] Desulfurization step: preheat the raw natural gas to about 300-400°C before desulfurization. The raw material natural gas in this embodiment is methane-based natural gas, which contains various impurities and usually contains trace amounts of sulfur. The purpose of desulfurization is to avoid catalyst poisoning in the subsequent steps. The conversion catalyst is very susceptible to poisoning and loses activity during use. There are strict requirements on the content of impurities in the raw materials, especially the content of sulfur. Since natural gas contains trace amounts of sulfur, the natural gas must be desulfurized first.
[0022] Conversion step: The conversion process is carried out in a reforming furnace. A general reformer includes a convection se...
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The invention provides integrated heat transfer equipment in a natural gas hydrogen production system. The integrated heat transfer equipment comprises a first heat exchange part and a second heat exchange part which are manufactured integrally. The first heat transfer part comprises a flue gas cylinder body, a raw material natural gas coil and a natural gas steam mixing coil, and the second heattransfer part comprises a reformed gas pipe bundle, a first flue gas pipe bundle and a boiler water supply shell. The first flue gas pipe bundle is connected in series to an outlet of the flue gas cylinder body. The integrated heat transfer equipment can reasonably optimize and effectively integrate a plurality of heat transfer equipment in the process of natural gas hydrogen production, can saveequipment investment, improves heat transfer efficiency of a system, reduces heat loss of the device, and ultimately reduces energy consumption of the device.
Description
technical field [0001] The invention relates to a heat exchange device, in particular to an integrated heat exchange device applied in a natural gas hydrogen production system. Background technique [0002] At present, the heat utilization of high-temperature flue gas in natural gas hydrogen production equipment generally adopts the convection section, and the convection section is composed of several independent heat exchange tubes. When the high-temperature flue gas passes through the convection section, it exchanges heat with natural gas steam mixture, raw natural gas, boiler feed water, air, etc., and finally is discharged into the atmosphere through the induced draft fan. The heat recovery of reformed gas is carried out through an independent reformed gas waste heat boiler. The waste heat boiler is generally a shell-and-tube heat exchange equipment, in which the reformed gas is used in the tube side, and the boiler feed water is used in the shell side. Saturated steam ...
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Login to View More IPC IPC(8): F28D21/00
CPCF28D21/00F28D2021/0019
Inventor 张维杨帆
Owner 四川创达新能科技有限公司