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System and method for increasing CO recovery rate of HyCO cold box

A recovery rate and cold box technology, applied in the system field of improving the CO recovery rate of HyCO cold box, can solve the problems of high technical difficulty and high equipment cost, and achieve the effects of increasing profits, increasing stability and reducing greenhouse gas emissions.

Pending Publication Date: 2018-07-27
SHANGHAI HUALIN IND GASES
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, an additional steam reformer for natural gas is required, which is costly and technically difficult

Method used

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  • System and method for increasing CO recovery rate of HyCO cold box

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Experimental program
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Embodiment

[0031] A system to increase CO recovery in HyCO cold boxes, such as figure 1 As shown, including: vapor-liquid separation tank 6, CO / CH4 Reboiler 7, N 2 / CO reboiler 8, N 2 / CO condenser 9, N 2 / CO separation tower 10, CO / CH 4 Separation tower 11, H 2 Stripper 12, liquid CO tank 14, liquid CO vaporizer 15, CO compressor 2, expander 3, plate-fin heat exchanger 4, vapor-liquid separation tank 6, H 2 Stripper 12, N 2 / CO separation tower 10, CO / CH 4 The separation towers 11 are connected in sequence, and the plate-fin heat exchanger 4 is arranged in front of the vapor-liquid separation tank 6, and the CO / CH 4 Reboiler 7 with CO / CH 4 Separation tower 11 is connected, N 2 / CO reboiler 8, N 2 / CO condenser 9 respectively with N 2 The / CO separation tower 10 is connected, and the gas-liquid separation tank 6 is connected to the synthesis gas raw material pipeline 17, CO / CH 4 The outlet of the separation tower 11 is connected to the low-pressure CO pipeline 18, the low-pres...

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Abstract

The invention relates to a system and method for increasing the CO recovery rate of a HyCO cold box. According to the system and the method, a supplement pipeline is externally connected to a pipelinebetween a CO / CH4 reboiler and a CO / CH4 separation tower, a liquid CO tank is arranged on the supplement pipeline, a liquid CO tank inlet valve is arranged at an inlet of the liquid CO tank, a liquidCO vaporizer and a liquid CO vaporizer outlet valve are arranged at an outlet of the liquid CO tank, the supplement pipeline is converged to a CO product pipeline; the liquid CO tank, a liquid CO regulating valve and the liquid CO vaporizer are additionally arranged to control liquid CO to be gasified into a gaseous CO product; during normal operation, the usage amount of CO is decreased by a client, and the usage amount of H2 is unchanged; a CO product external feeding valve is closed to be smaller, the liquid CO tank inlet valve is opened to be bigger, the liquid CO vaporizer outlet valve isclosed to be smaller, and the liquid level of the liquid CO tank is increased; and until the amount of the CO product is recovered by the client, the CO product external feeding valve is opened to bebigger, the opening degree of the liquid CO tank inlet valve is decreased, meanwhile, the liquid CO vaporizer outlet valve is opened to be bigger, and the liquid level of the liquid CO tank is decreased.

Description

technical field [0001] The invention relates to a HyCO cold box system, in particular to a system and method for improving the CO recovery rate of the HyCO cold box. Background technique [0002] At present, the HYCO device mainly uses the raw material (synthesis gas, the composition includes about 54% CO, about 45% H 2 and a small amount of N 2 、CH 4 , Ar) changes from high-pressure CO to low-pressure CO throttling expansion refrigeration, enters the cold box for liquefaction, and uses the different boiling points of each gas to gradually remove CH 4 , N 2 , Ar, and can make CO and H 2 pass. After purification, the final product is H 2 And CO products to customers. [0003] HYCO natural gas steam reformer to produce H 2 The device is to produce H through the reaction of natural gas as raw material and steam 2 The device of the product. [0004] Same 100Nm 3 The syngas enters the cold box, and the CO product that comes out is 54Nm 3 , H 2 Product is 45Nm 3 . T...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F25J3/06
CPCF25J3/0625F25J3/0665F25J3/0695F25J3/0223F25J3/0233F25J3/0252F25J3/0257F25J3/0261F25J2200/40F25J2200/70F25J2200/72F25J2200/76F25J2205/04F25J2215/04F25J2250/30F25J2270/04F25J2270/24F25J2290/62
Inventor 徐晶李现民苏科峰陆连根钱海玲宋孝林谢惠云
Owner SHANGHAI HUALIN IND GASES