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Method for synthesizing ethylene glycol by using coke oven gas

A technology for coke oven gas and ethylene glycol, which is applied in chemical instruments and methods, removal of gas pollutants, preparation of organic compounds, etc. Great economic and social environmental benefits, the effect of making up for blast furnace heat loss and avoiding environmental pollution

Inactive Publication Date: 2021-09-14
SHANXI JINNAN IRON & STEEL GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Firstly, the use of salt solution (such as calcium chloride, magnesium chloride, sodium nitrate, sodium nitrite) can lower the freezing point to below -30°C, but it cannot solve the rust problem
The freezing point can also be lowered with sugar and honey, and it does not corrode metals, but it is expensive and has poor thermal stability
Although kerosene and diesel oil are used as coolants with low freezing points, they are poor in heat transfer, easy to burn, and have a swelling effect on rubber, so they are not used.
Before and after World War II, methanol and ethanol were used as coolants. Although they are cheap and have a low freezing point, they cannot be ideal coolants due to their low boiling point, volatile, and flammable properties.

Method used

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  • Method for synthesizing ethylene glycol by using coke oven gas

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] A method for synthesizing ethylene glycol with coke oven gas, comprising the following steps:

[0034] 1. The pressure sent from the coking plant is 5KPa and the flow rate is 120000Nm 3 / h The coke oven gas is sent to the FD type electric tar catcher to remove tar and dust;

[0035] 2. Send the coke oven gas after removing tar and dust to the screw compressor, and increase the pressure of the coke oven gas from 10Kpa to 0.6Mpa;

[0036] 3. Send the coke oven gas with a pressure of 0.6Mpa to the coke oven gas rough desulfurization tower to absorb and remove H in the gas 2 S, making H in the coke oven gas exiting the coke oven gas rough desulfurization tower 2 S content <1ppm;

[0037] 4. Send the coke oven gas from the coke oven gas rough desulfurization tower in step 3 into the TSA adsorption tower for adsorption and regeneration, and transfer to the regeneration process after the TSA tower absorbs tar, naphthalene, benzene, ammonia, HCN and a small amount of sulfur ...

Embodiment 2

[0052] With the isolated H 2 76% analytical gas (the composition of the analytical gas is as shown in Table 1) is used for blast furnace injection ironmaking

[0053] Table 1 Analysis gas composition

[0054] Element H 2

CH 4

CO CO 2

N 2

h 2 o

Total content / % 76 12.5 1.5 1 9 0 100

[0055] 1. Will contain H 2 The desorption gas with a volume of 76% is pressurized to 0.80Mpa by a pressurizer;

[0056] 2. The analytic gas pressurized to 0.80Mpa is sent to the high-temperature multi-tube heat exchanger through the gas delivery pipeline with a diameter of DN500, and is heated in sections under the action of the high-temperature flue gas of 1100°C generated by the flue gas generator. Heating it to 750°C in the same way (normal temperature → 250°C → 500°C → 750°C);

[0057] 3. Send the analytical gas heated in step 2 into the cracking furnace, and use 2417Nm 3 / h Supplement oxygen for combustion, thereby adjusting the comp...

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Abstract

The invention relates to the technical field of coke oven gas application, and discloses a method for synthesizing ethylene glycol by using coke oven gas. The method specifically comprises the following steps: after coke oven gas is subjected to tar and dust removal, compression, coarse desulfurization, TSA adsorption tower adsorption and regeneration, further compression, fine desulfurization, cooling and cryogenic separation, CO in the purity of 99% is synthesized into DMO, H2 in the purity of 99% and the synthesized DMO are synthesized in ethylene glycol, and meanwhile, the separated desorption gas containing 70%-80% of H2 is conveyed to a blast furnace for hydrogen injection ironmaking. According to the method, CO and H2 in coke oven gas are fully recycled and utilized to be converted into an ethylene glycol product with a higher additional value by adopting the coke oven gas to produce ethylene glycol, waste is turned into wealth, energy is utilized, the problems of energy waste and environmental pollution caused by the fact that the coke oven gas is emptied and burnt off are avoided, great economic benefits and social and environmental benefits are achieved, and the method plays a demonstration role in utilization of coke oven gas in iron and steel enterprises.

Description

technical field [0001] The invention relates to the technical field of coke oven gas application, in particular to a method for synthesizing ethylene glycol with coke oven gas. Background technique [0002] Coke oven gas, also known as coke oven gas, refers to a combustible gas produced while coke and tar products are produced after coking coal is subjected to high-temperature dry distillation in a coke oven. It is a by-product of the coking industry. Coke oven gas has a high calorific value and is usually used as fuel for high-temperature industrial furnaces or city gas. [0003] With the gradual improvement of environmental protection requirements, the new coking industry access standard has clearly stipulated that the utilization rate of coke oven gas should exceed 98%. Therefore, many coke oven gas utilization technologies have been developed, such as coke oven gas to liquefied natural gas, coke oven gas to methanol, etc. [0004] Ethylene glycol, commonly known as gly...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C29/149C07C31/20C10K1/32C10K1/08C10K1/04C10K1/02C10K1/00C21B5/00C01B32/40C01B3/56
CPCC07C29/149C10K1/028C10K1/002C10K1/004C10K1/32C10K1/003C10K1/08C10K1/04C21B5/001C01B32/40C01B3/56C21B2005/005C07C31/202Y02P10/143
Inventor 赵雷雷林
Owner SHANXI JINNAN IRON & STEEL GRP CO LTD
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