Method for using hydrogen and carbon monoxide to separate cold box tail gas as reformer fuel

Abstract

The invention relates to a method using hydrogen and carbon monoxide separation cold box tail gas as a converter fuel. Partial cold box tail gas is connected to a torch through a discharge pipeline, and combusts, and the residual cold ox tail gas is connected to a converter through a tail gas reuse pipeline, and is used as a converter fuel; and the discharge pipeline is provided with a regulating valve for regulating the flow amount and the pressure of the cold box tail gas entering the torch and combusting, and the tail gas reuse pipeline is provided with a regulating valve for regulating the flow amount and the pressure of the cold box tail gas entering the converter and combusting. The method concretely comprises the following steps: starting the converter to make the converter normally run; regulating the regulating valve on the discharge pipeline to regulate the pressure of the cold box tail gas entering the torch and combusting to 0.6-1bar; regulating the regulating valve on the tail gas reuse pipeline to regulate the pressure of the cold box tail gas entering the converter and combusting to 0.4-0.8bar; and controlling the flow amount of the cold box tail gas entering the converter and combusting to 30-120nm<3> / h. Compared with the prior art, the method has the advantages of cost saving, large economy value, environmental protection and cleanness.

Description

technical field

[0001] The invention relates to a method for reusing tail gas, in particular to a method for using hydrogen and carbon monoxide to separate cold box tail gas as reformer fuel. Background technique

[0002] The treatment of industrial tail gas is generally carried out by adsorption and treatment according to its physical and chemical properties, which largely requires the investment of manpower and material resources, as well as the recovery of treated waste liquid and waste residue. For example, sulfuric acid industrial tail gas needs ammonia water to adsorb, nitric acid industrial tail gas needs to be adsorbed by sodium hydroxide, etc. Although this treatment method can reduce the pollution of the tail gas to the environment, the utilization rate of useful substances in the tail gas is low.

[0003] HyCO is a mixture of hydrogen and carbon monoxide (Hydrogen+CO). In a narrow sense, HyCO is a chemical process that simultaneously produces hydrogen and carbon...

Examples

Embodiment 1

[0025] A method of using hydrogen and carbon monoxide to separate cold box tail gas as reformer fuel, the process flow is as follows figure 1 As shown, a part of the tail gas in the cold box 1 is connected to the torch 2 for combustion through the discharge pipe 4, and the remaining cold box tail gas is connected to the reformer 3 through the tail gas reuse pipe 6 as the reformer fuel; The first regulating valve 5 for the flow and pressure of the cold box tail gas of combustion is provided. The tail gas reuse pipeline 6 is provided with a second regulating valve 7 for adjusting the flow and pressure of the cold box tail gas entering the reformer combustion. The tail gas reuse pipe 6 is also provided with There is a hand valve to control the opening and closing of the pipeline. The reformer 3 is a reformer for steam methane reforming (SMR).

[0026] The method specifically includes the following steps:

[0027] (1) Open the reformer to make it run normally;

[0028] (2) adju...

Embodiment 2

[0033] A method of how to lead the cold box tail gas to the SMR reformer:

[0034] (1) The SMR reformer has been started and is in normal production;

[0035] (2) Process setting, open all hand valves on the reutilization pipeline from the cold box exhaust gas to the SMR reformer exhaust gas.

[0036] (3) Regulate the regulating valve on the discharge pipeline so that the pressure of the cold box tail gas entering the torch combustion is adjusted to 0.6 bar;

[0037] (4) Regulate the regulating valve on the tail gas reuse pipeline, so that the pressure of the cold box tail gas entering the reformer combustion is adjusted to 0.7 bar;

[0038] (5) Control the flow rate of the cold box exhaust gas entering the reformer to be 0m 3 / h.

[0039] (6) The valve opening degree of the second regulating valve is 0%, and the first regulating valve is opened, and now the tail gas is all vented and burned.

Embodiment 3

[0041] A method of how to lead the cold box tail gas to the SMR reformer:

[0042] (1) The SMR reformer has been started and is in normal production;

[0043] (2) Process setting, open all hand valves on the reutilization pipeline from the cold box exhaust gas to the SMR reformer exhaust gas.

[0044] (3) adjust the regulating valve on the discharge pipeline so that the pressure of the cold box tail gas entering the torch combustion is adjusted to 0.8 bar;

[0045] (4) Regulate the regulating valve on the tail gas reuse pipeline, so that the pressure of the cold box tail gas entering the reformer combustion is adjusted to 0.4 bar;

[0046] (5) Control the flow rate of the cold box exhaust gas entering the reformer to be 100m 3 / h.

[0047] (6) The opening degree of the first regulating valve is 0%, and the second regulating valve is opened. At this time, all the tail gas is led to the SMR reformer for combustion.

technical field

[0001] The invention relates to a method for reusing tail gas, in particular to a method for using hydrogen and carbon monoxide to separate cold box tail gas as reformer fuel. Background technique

[0002] The treatment of industrial tail gas is generally carried out by adsorption and treatment according to its physical and chemical properties, which largely requires the investment of manpower and material resources, as well as the recovery of treated waste liquid and waste residue. For example, sulfuric acid industrial tail gas needs ammonia water to adsorb, nitric acid industrial tail gas needs to be adsorbed by sodium hydroxide, etc. Although this treatment method can reduce the pollution of the tail gas to the environment, the utilization rate of useful substances in the tail gas is low.

[0003] HyCO is a mixture of hydrogen and carbon monoxide (Hydrogen+CO). In a narrow sense, HyCO is a chemical process that simultaneously produces hydrogen and carbon...

Examples

Embodiment 1

[0025] A method of using hydrogen and carbon monoxide to separate cold box tail gas as reformer fuel, the process flow is as follows figure 1 As shown, a part of the tail gas in the cold box 1 is connected to the torch 2 for combustion through the discharge pipe 4, and the remaining cold box tail gas is connected to the reformer 3 through the tail gas reuse pipe 6 as the reformer fuel; The first regulating valve 5 for the flow and pressure of the cold box tail gas of combustion is provided. The tail gas reuse pipeline 6 is provided with a second regulating valve 7 for adjusting the flow and pressure of the cold box tail gas entering the reformer combustion. The tail gas reuse pipe 6 is also provided with There is a hand valve to control the opening and closing of the pipeline. The reformer 3 is a reformer for steam methane reforming (SMR).

[0026] The method specifically includes the following steps:

[0027] (1) Open the reformer to make it run normally;

[0028] (2) adju...

Embodiment 2

[0033] A method of how to lead the cold box tail gas to the SMR reformer:

[0034] (1) The SMR reformer has been started and is in normal production;

[0035] (2) Process setting, open all hand valves on the reutilization pipeline from the cold box exhaust gas to the SMR reformer exhaust gas.

[0036] (3) Regulate the regulating valve on the discharge pipeline so that the pressure of the cold box tail gas entering the torch combustion is adjusted to 0.6 bar;

[0037] (4) Regulate the regulating valve on the tail gas reuse pipeline, so that the pressure of the cold box tail gas entering the reformer combustion is adjusted to 0.7 bar;

[0038] (5) Control the flow rate of the cold box exhaust gas entering the reformer to be 0m 3 / h.

[0039] (6) The valve opening degree of the second regulating valve is 0%, and the first regulating valve is opened, and now the tail gas is all vented and burned.

Embodiment 3

[0041] A method of how to lead the cold box tail gas to the SMR reformer:

[0042] (1) The SMR reformer has been started and is in normal production;

[0043] (2) Process setting, open all hand valves on the reutilization pipeline from the cold box exhaust gas to the SMR reformer exhaust gas.

[0044] (3) adjust the regulating valve on the discharge pipeline so that the pressure of the cold box tail gas entering the torch combustion is adjusted to 0.8 bar;

[0045] (4) Regulate the regulating valve on the tail gas reuse pipeline, so that the pressure of the cold box tail gas entering the reformer combustion is adjusted to 0.4 bar;

[0046] (5) Control the flow rate of the cold box exhaust gas entering the reformer to be 100m 3 / h.

[0047] (6) The opening degree of the first regulating valve is 0%, and the second regulating valve is opened. At this time, all the tail gas is led to the SMR reformer for combustion.

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